ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 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"
8		11
		12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
		16
		17	#ifdef HAVE_MMAP
		18	# include <unistd.h>
		19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
		26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
		39
9	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
10	# include <valgrind/valgrind.h>	41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
11	#endif	45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
12		49
13	#define PERL_VERSION_ATLEAST(a,b,c) \	50	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \	51	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \	52	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \	53	&& (PERL_VERSION > (b) \
…		…
35	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
37	# endif	74	# endif
38	#endif	75	#endif
39		76
40	#include <stdio.h>	77	/* 5.8.8 */
41	#include <errno.h>	78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
		90	/* 5.8.7 */
		91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
42		94
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD	96	# undef CORO_STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50
51	#ifdef HAVE_MMAP
52	# include <unistd.h>
53	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS
55	# ifdef MAP_ANON
56	# define MAP_ANONYMOUS MAP_ANON
57	# else
58	# undef HAVE_MMAP
59	# endif
60	# endif	97	#endif
61	# include <limits.h>	98
62	# ifndef PAGESIZE	99	#ifndef CORO_STACKGUARD
63	# define PAGESIZE pagesize	100	# define CORO_STACKGUARD 0
64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65	static long pagesize;
66	# else
67	# define BOOT_PAGESIZE
68	# endif	101	#endif
69	#endif
70		102
71	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* prefer perl internal functions over our own? */
72	* to the current C stack pointer. Its property is that it changes with each call	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
73	* and should be unique. */	105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
		107
		108	/* The next macros try to return the current stack pointer, in an as
		109	* portable way as possible. */
74	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
75	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
76		112
77	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
78		114
79	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
80	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
81	#else	119	#else
82	# define attribute(x)	120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
83	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
84		127
85	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
86		129
87	#include "CoroAPI.h"	130	#include "CoroAPI.h"
88
89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90		131
91	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
92	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	134	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	135	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95	#else	136	#else
96	# define LOCK (void)0	137	# define LOCK (void)0
97	# define UNLOCK (void)0	138	# define UNLOCK (void)0
98	#endif	139	#endif
99		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
100	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
101	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
102	static HV *coro_state_stash, *coro_stash;	154	static HV *coro_state_stash, *coro_stash;
103	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
		156
		157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
		167
		168	static struct coro_cctx *cctx_first;
		169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
104		179
105	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
106	typedef struct coro_stack {	181	typedef struct coro_cctx {
107	struct coro_stack *next;	182	struct coro_cctx *next;
108		183
109	/* the stack */	184	/* the stack */
110	void *sptr;	185	void *sptr;
111	long ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
112		187
113	/* cpu state */	188	/* cpu state */
114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
115	JMPENV *top_env;	191	JMPENV *top_env;
116	coro_context cctx;	192	coro_context cctx;
117		193
118	#if USE_VALGRIND	194	#if CORO_USE_VALGRIND
119	int valgrind_id;	195	int valgrind_id;
120	#endif	196	#endif
121	} coro_stack;	197	unsigned char flags;
		198	} coro_cctx;
		199
		200	enum {
		201	CF_RUNNING = 0x0001, /* coroutine is running */
		202	CF_READY = 0x0002, /* coroutine is ready */
		203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122		219
123	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
124	struct coro {	221	struct coro {
125	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
126	coro_stack *stack;	223	coro_cctx *cctx;
127		224
128	/* data associated with this coroutine (initial args) */	225	/* process data */
129	AV *args;
130	int refcnt;
131
132	/* optionally saved, might be zero */
133	AV *defav;
134	SV *defsv;
135	SV *errsv;
136
137	/* saved global state not related to stacks */
138	U8 dowarn;
139	I32 in_eval;
140
141	/* the stacks and related info (callchain etc..) */
142	PERL_SI *curstackinfo;
143	AV *curstack;
144	AV *mainstack;	226	AV *mainstack;
145	SV **stack_sp;	227	perl_slots *slot; /* basically the saved sp */
146	OP *op;	228
147	SV **curpad;	229	AV *args; /* data associated with this coroutine (initial args) */
148	AV *comppad;	230	int refcnt; /* coroutines are refcounted, yes */
149	CV *compcv;	231	int flags; /* CF_ flags */
150	SV **stack_base;	232	HV *hv; /* the perl hash associated with this coro, if any */
151	SV **stack_max;	233
152	SV **tmps_stack;	234	/* statistics */
153	I32 tmps_floor;	235	int usecount; /* number of transfers to this coro */
154	I32 tmps_ix;
155	I32 tmps_max;
156	I32 *markstack;
157	I32 *markstack_ptr;
158	I32 *markstack_max;
159	I32 *scopestack;
160	I32 scopestack_ix;
161	I32 scopestack_max;
162	ANY *savestack;
163	I32 savestack_ix;
164	I32 savestack_max;
165	OP **retstack;
166	I32 retstack_ix;
167	I32 retstack_max;
168	PMOP *curpm;
169	COP *curcop;
170		236
171	/* coro process data */	237	/* coro process data */
172	int prio;	238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro *next, *prev;
173	};	246	};
174		247
175	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
176	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
177		250
		251	/** Coro ********************************************************************/
		252
		253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,10,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
178	static AV *	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,10,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,10,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
179	coro_clone_padlist (CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
180	{	300	{
181	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
182	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
183		303
184	newpadlist = newAV ();	304	newpadlist = newAV ();
185	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
186	#if PERL_VERSION_ATLEAST (5,9,0)	306	#if PERL_VERSION_ATLEAST (5,10,0)
187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188	#else	308	#else
189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190	#endif	310	#endif
191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
196		316
197	return newpadlist;	317	return newpadlist;
198	}	318	}
199		319
200	static void	320	static void
201	free_padlist (AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
202	{	322	{
203	/* may be during global destruction */	323	/* may be during global destruction */
204	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
205	{	325	{
206	I32 i = AvFILLp (padlist);	326	I32 i = AvFILLp (padlist);
…		…
227	AV *padlist;	347	AV *padlist;
228	AV *av = (AV *)mg->mg_obj;	348	AV *av = (AV *)mg->mg_obj;
229		349
230	/* casting is fun. */	350	/* casting is fun. */
231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232	free_padlist (padlist);	352	free_padlist (aTHX_ padlist);
233
234	SvREFCNT_dec (av);
235		353
236	return 0;	354	return 0;
237	}	355	}
238		356
239	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
240		359
241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
		364
		365	#define CORO_MAGIC(sv,type) \
		366	SvMAGIC (sv) \
		367	? SvMAGIC (sv)->mg_type == type \
		368	? SvMAGIC (sv) \
		369	: mg_find (sv, type) \
		370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
242		400
243	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
244	static void	402	static void
245	get_padlist (CV *cv)	403	get_padlist (pTHX_ CV *cv)
246	{	404	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
		406	AV *av;
248		407
249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251	else	410	else
252	{	411	{
253	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
254	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
255	CV *cp = Perl_cv_clone (cv);	414	CV *cp = Perl_cv_clone (cv);
256	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
257	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
258	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
259	#else	418	#else
260	CvPADLIST (cv) = coro_clone_padlist (cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261	#endif	420	#endif
262	}	421	}
263	}	422	}
264		423
265	static void	424	static void
266	put_padlist (CV *cv)	425	put_padlist (pTHX_ CV *cv)
267	{	426	{
268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
		428	AV *av;
269		429
270	if (!mg)	430	if (expect_false (!mg))
271	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274	mg->mg_virtual = &vtbl_coro;
275	mg->mg_obj = (SV *)newAV ();
276	}
277		432
278	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	433	av = (AV *)mg->mg_obj;
279	}
280		434
281	#define SB do {	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
282	#define SE } while (0)	436	av_extend (av, AvMAX (av) + 1);
283		437
284	#define LOAD(state) load_state((state));	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	#define SAVE(state,flags) save_state((state),(flags));	439	}
286		440
287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	441	/** load & save, init *******************************************************/
288		442
289	static void	443	static void
290	load_state(Coro__State c)	444	load_perl (pTHX_ Coro__State c)
291	{	445	{
292	PL_dowarn = c->dowarn;	446	perl_slots *slot = c->slot;
293	PL_in_eval = c->in_eval;	447	c->slot = 0;
294		448
295	PL_curstackinfo = c->curstackinfo;
296	PL_curstack = c->curstack;
297	PL_mainstack = c->mainstack;	449	PL_mainstack = c->mainstack;
298	PL_stack_sp = c->stack_sp;
299	PL_op = c->op;
300	PL_curpad = c->curpad;
301	PL_comppad = c->comppad;
302	PL_compcv = c->compcv;
303	PL_stack_base = c->stack_base;
304	PL_stack_max = c->stack_max;
305	PL_tmps_stack = c->tmps_stack;
306	PL_tmps_floor = c->tmps_floor;
307	PL_tmps_ix = c->tmps_ix;
308	PL_tmps_max = c->tmps_max;
309	PL_markstack = c->markstack;
310	PL_markstack_ptr = c->markstack_ptr;
311	PL_markstack_max = c->markstack_max;
312	PL_scopestack = c->scopestack;
313	PL_scopestack_ix = c->scopestack_ix;
314	PL_scopestack_max = c->scopestack_max;
315	PL_savestack = c->savestack;
316	PL_savestack_ix = c->savestack_ix;
317	PL_savestack_max = c->savestack_max;
318	#if !PERL_VERSION_ATLEAST (5,9,0)
319	PL_retstack = c->retstack;
320	PL_retstack_ix = c->retstack_ix;
321	PL_retstack_max = c->retstack_max;
322	#endif
323	PL_curpm = c->curpm;
324	PL_curcop = c->curcop;
325		450
326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	451	GvSV (PL_defgv) = slot->defsv;
327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	452	GvAV (PL_defgv) = slot->defav;
328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
		456	#define VAR(name,type) PL_ ## name = slot->name;
		457	# include "state.h"
		458	#undef VAR
329		459
330	{	460	{
331	dSP;	461	dSP;
		462
332	CV *cv;	463	CV *cv;
333		464
334	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
336	{	467	{
337	AV *padlist = (AV *)POPs;
338
339	if (padlist)
340	{
341	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
342	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
343	}	470	CvPADLIST (cv) = (AV *)POPs;
344
345	++CvDEPTH(cv);
346	}	471	}
347		472
348	PUTBACK;	473	PUTBACK;
349	}	474	}
350	}	475	}
351		476
352	static void	477	static void
353	save_state(Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
354	{	479	{
355	{	480	{
356	dSP;	481	dSP;
357	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
358	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
361	/*	486	/*
362	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
363	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
364	*/	489	*/
365		490
366	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
367	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
368	for (;;)	493	for (;;)
369	{	494	{
370	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
371	{	496	{
372	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
373		498
374	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375	{	500	{
376	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
377	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
378	{	504	{
379	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
390		509
		510	CvDEPTH (cv) = 0;
391	get_padlist (cv);	511	get_padlist (aTHX_ cv);
392	}	512	}
393	}	513	}
394	#ifdef CXt_FORMAT
395	else if (CxTYPE(cx) == CXt_FORMAT)
396	{
397	/* I never used formats, so how should I know how these are implemented? */
398	/* my bold guess is as a simple, plain sub... */
399	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400	}
401	#endif
402	}	514	}
403		515
404	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
405	break;	517	break;
406		518
407	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
408	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
409	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
410	}	522	}
411		523
412	PUTBACK;	524	PUTBACK;
413	}	525	}
414		526
415	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
416	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
417	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
418		538
419	c->dowarn = PL_dowarn;
420	c->in_eval = PL_in_eval;
421
422	c->curstackinfo = PL_curstackinfo;
423	c->curstack = PL_curstack;
424	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
425	c->stack_sp = PL_stack_sp;	540
426	c->op = PL_op;	541	{
427	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428	c->comppad = PL_comppad;	543
429	c->compcv = PL_compcv;	544	slot->defav = GvAV (PL_defgv);
430	c->stack_base = PL_stack_base;	545	slot->defsv = DEFSV;
431	c->stack_max = PL_stack_max;	546	slot->errsv = ERRSV;
432	c->tmps_stack = PL_tmps_stack;	547	slot->irsgv = GvSV (irsgv);
433	c->tmps_floor = PL_tmps_floor;	548
434	c->tmps_ix = PL_tmps_ix;	549	#define VAR(name,type) slot->name = PL_ ## name;
435	c->tmps_max = PL_tmps_max;	550	# include "state.h"
436	c->markstack = PL_markstack;	551	#undef VAR
437	c->markstack_ptr = PL_markstack_ptr;	552	}
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	#if !PERL_VERSION_ATLEAST (5,9,0)
446	c->retstack = PL_retstack;
447	c->retstack_ix = PL_retstack_ix;
448	c->retstack_max = PL_retstack_max;
449	#endif
450	c->curpm = PL_curpm;
451	c->curcop = PL_curcop;
452	}	553	}
453		554
454	/*	555	/*
455	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
456	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
457	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
458	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
459	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
460	static void	564	static void
461	coro_init_stacks ()	565	coro_init_stacks (pTHX)
462	{	566	{
463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	567	PL_curstackinfo = new_stackinfo(32, 8);
464	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
465	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467		571
468	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
469	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471		575
472	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
473	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
474	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
475	PL_tmps_max = 96;	579	PL_tmps_max = 32;
476		580
477	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
478	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
479	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
480		584
481	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
482	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
483	#endif	587	#endif
484		588
485	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
486	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
487	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
488		592
489	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
490	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
491	PL_savestack_max = 96;	595	PL_savestack_max = 24;
492		596
493	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,10,0)
494	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
495	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
496	PL_retstack_max = 8;	600	PL_retstack_max = 4;
497	#endif	601	#endif
498	}	602	}
		603	#endif
499		604
500	/*	605	/*
501	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
502	*/	607	*/
503	static void	608	static void
504	coro_destroy_stacks()	609	coro_destroy_stacks (pTHX)
505	{	610	{
506	if (!IN_DESTRUCT)
507	{
508	/* is this ugly, I ask? */
509	LEAVE_SCOPE (0);
510
511	/* sure it is, but more important: is it correct?? :/ */
512	FREETMPS;
513
514	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515	}
516
517	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
519		613
520	while (PL_curstackinfo)	614	while (PL_curstackinfo)
521	{	615	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
523		617
524	{ /*D*//*remove*/
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
531	{
532	dounwind (-1);/*D*//*remove*/
533	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
534	}
535		620
536	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
537	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
538	PL_curstackinfo = p;	623	PL_curstackinfo = p;
539	}	624	}
540		625
541	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
542	Safefree (PL_markstack);	627	Safefree (PL_markstack);
543	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
544	Safefree (PL_savestack);	629	Safefree (PL_savestack);
545	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,10,0)
546	Safefree (PL_retstack);	631	Safefree (PL_retstack);
547	#endif	632	#endif
548	}	633	}
549		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,10,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
550	static void	724	static void
551	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
552	{	726	{
553	/*	727	/*
554	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
555	*/	729	*/
556
557	coro_init_stacks ();	730	coro_init_stacks (aTHX);
558		731
		732	PL_runops = RUNOPS_DEFAULT;
		733	PL_curcop = &PL_compiling;
		734	PL_in_eval = EVAL_NULL;
559	PL_curcop = 0;	735	PL_comppad = 0;
560	PL_in_eval = 0;
561	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
		738	PL_localizing = 0;
		739	PL_dirty = 0;
		740	PL_restartop = 0;
		741	#if PERL_VERSION_ATLEAST (5,10,0)
		742	PL_parser = 0;
		743	#endif
		744
		745	/* recreate the die/warn hooks */
		746	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		747	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		748
		749	GvSV (PL_defgv) = newSV (0);
		750	GvAV (PL_defgv) = coro->args; coro->args = 0;
		751	GvSV (PL_errgv) = newSV (0);
		752	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		753	PL_rs = newSVsv (GvSV (irsgv));
		754	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
562		755
563	{	756	{
564	dSP;	757	dSP;
565	LOGOP myop;	758	LOGOP myop;
566		759
567	/* I have no idea why this is needed, but it is */
568	PUSHMARK (SP);
569
570	SvREFCNT_dec (GvAV (PL_defgv));
571	GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573	Zero (&myop, 1, LOGOP);	760	Zero (&myop, 1, LOGOP);
574	myop.op_next = Nullop;	761	myop.op_next = Nullop;
575	myop.op_flags = OPf_WANT_VOID;	762	myop.op_flags = OPf_WANT_VOID;
576		763
		764	PUSHMARK (SP);
		765	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		766	PUTBACK;
577	PL_op = (OP *)&myop;	767	PL_op = (OP *)&myop;
578
579	PUSHMARK (SP);
580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581	PUTBACK;
582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	768	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583	SPAGAIN;	769	SPAGAIN;
584
585	ENTER; /* necessary e.g. for dounwind */
586	}	770	}
		771
		772	/* this newly created coroutine might be run on an existing cctx which most
		773	* likely was suspended in set_stacklevel, called from entersub.
		774	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		775	* so we ENTER here for symmetry
		776	*/
		777	ENTER;
587	}	778	}
588		779
589	static void	780	static void
		781	coro_destroy (pTHX_ struct coro *coro)
		782	{
		783	if (!IN_DESTRUCT)
		784	{
		785	/* restore all saved variables and stuff */
		786	LEAVE_SCOPE (0);
		787	assert (PL_tmps_floor == -1);
		788
		789	/* free all temporaries */
		790	FREETMPS;
		791	assert (PL_tmps_ix == -1);
		792
		793	/* unwind all extra stacks */
		794	POPSTACK_TO (PL_mainstack);
		795
		796	/* unwind main stack */
		797	dounwind (-1);
		798	}
		799
		800	SvREFCNT_dec (GvSV (PL_defgv));
		801	SvREFCNT_dec (GvAV (PL_defgv));
		802	SvREFCNT_dec (GvSV (PL_errgv));
		803	SvREFCNT_dec (PL_defoutgv);
		804	SvREFCNT_dec (PL_rs);
		805	SvREFCNT_dec (GvSV (irsgv));
		806
		807	SvREFCNT_dec (PL_diehook);
		808	SvREFCNT_dec (PL_warnhook);
		809
		810	SvREFCNT_dec (coro->saved_deffh);
		811	SvREFCNT_dec (coro->throw);
		812
		813	coro_destroy_stacks (aTHX);
		814	}
		815
		816	static void
590	free_coro_mortal ()	817	free_coro_mortal (pTHX)
591	{	818	{
592	if (coro_mortal)	819	if (expect_true (coro_mortal))
593	{	820	{
594	SvREFCNT_dec (coro_mortal);	821	SvREFCNT_dec (coro_mortal);
595	coro_mortal = 0;	822	coro_mortal = 0;
596	}	823	}
597	}	824	}
598		825
		826	static int
		827	runops_trace (pTHX)
		828	{
		829	COP *oldcop = 0;
		830	int oldcxix = -2;
		831	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		832	coro_cctx *cctx = coro->cctx;
		833
		834	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		835	{
		836	PERL_ASYNC_CHECK ();
		837
		838	if (cctx->flags & CC_TRACE_ALL)
		839	{
		840	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		841	{
		842	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		843	SV **bot, **top;
		844	AV *av = newAV (); /* return values */
		845	SV **cb;
		846	dSP;
		847
		848	GV *gv = CvGV (cx->blk_sub.cv);
		849	SV *fullname = sv_2mortal (newSV (0));
		850	if (isGV (gv))
		851	gv_efullname3 (fullname, gv, 0);
		852
		853	bot = PL_stack_base + cx->blk_oldsp + 1;
		854	top = cx->blk_gimme == G_ARRAY ? SP + 1
		855	: cx->blk_gimme == G_SCALAR ? bot + 1
		856	: bot;
		857
		858	av_extend (av, top - bot);
		859	while (bot < top)
		860	av_push (av, SvREFCNT_inc (*bot++));
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_no);
		868	PUSHs (fullname);
		869	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		872	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	if (oldcop != PL_curcop)
		880	{
		881	oldcop = PL_curcop;
		882
		883	if (PL_curcop != &PL_compiling)
		884	{
		885	SV **cb;
		886
		887	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		888	{
		889	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		890
		891	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		892	{
		893	runops_proc_t old_runops = PL_runops;
		894	dSP;
		895	GV *gv = CvGV (cx->blk_sub.cv);
		896	SV *fullname = sv_2mortal (newSV (0));
		897
		898	if (isGV (gv))
		899	gv_efullname3 (fullname, gv, 0);
		900
		901	PL_runops = RUNOPS_DEFAULT;
		902	ENTER;
		903	SAVETMPS;
		904	EXTEND (SP, 3);
		905	PUSHMARK (SP);
		906	PUSHs (&PL_sv_yes);
		907	PUSHs (fullname);
		908	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		909	PUTBACK;
		910	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		911	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		912	SPAGAIN;
		913	FREETMPS;
		914	LEAVE;
		915	PL_runops = runops_trace;
		916	}
		917
		918	oldcxix = cxstack_ix;
		919	}
		920
		921	if (cctx->flags & CC_TRACE_LINE)
		922	{
		923	dSP;
		924
		925	PL_runops = RUNOPS_DEFAULT;
		926	ENTER;
		927	SAVETMPS;
		928	EXTEND (SP, 3);
		929	PL_runops = RUNOPS_DEFAULT;
		930	PUSHMARK (SP);
		931	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		932	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		933	PUTBACK;
		934	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		935	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		936	SPAGAIN;
		937	FREETMPS;
		938	LEAVE;
		939	PL_runops = runops_trace;
		940	}
		941	}
		942	}
		943	}
		944	}
		945
		946	TAINT_NOT;
		947	return 0;
		948	}
		949
		950	/* inject a fake call to Coro::State::_cctx_init into the execution */
		951	/* _cctx_init should be careful, as it could be called at almost any time */
		952	/* during execution of a perl program */
599	static void NOINLINE	953	static void NOINLINE
600	prepare_cctx (coro_stack *cctx)	954	cctx_prepare (pTHX_ coro_cctx *cctx)
601	{	955	{
602	dSP;	956	dSP;
603	LOGOP myop;	957	LOGOP myop;
604		958
		959	PL_top_env = &PL_start_env;
		960
		961	if (cctx->flags & CC_TRACE)
		962	PL_runops = runops_trace;
		963
605	Zero (&myop, 1, LOGOP);	964	Zero (&myop, 1, LOGOP);
606	myop.op_next = PL_op;	965	myop.op_next = PL_op;
607	myop.op_flags = OPf_WANT_VOID;	966	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610		967
611	PUSHMARK (SP);	968	PUSHMARK (SP);
		969	EXTEND (SP, 2);
		970	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	971	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613	PUTBACK;	972	PUTBACK;
		973	PL_op = (OP *)&myop;
614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	974	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615	SPAGAIN;	975	SPAGAIN;
616	}	976	}
617		977
		978	/*
		979	* this is a _very_ stripped down perl interpreter ;)
		980	*/
618	static void	981	static void
619	coro_run (void *arg)	982	cctx_run (void *arg)
620	{	983	{
		984	dTHX;
		985
621	/* coro_run is the alternative epilogue of transfer() */	986	/* cctx_run is the alternative tail of transfer(), so unlock here. */
622	UNLOCK;	987	UNLOCK;
623		988
		989	/* we now skip the entersub that lead to transfer() */
		990	PL_op = PL_op->op_next;
		991
		992	/* inject a fake subroutine call to cctx_init */
		993	cctx_prepare (aTHX_ (coro_cctx *)arg);
		994
		995	/* somebody or something will hit me for both perl_run and PL_restartop */
		996	PL_restartop = PL_op;
		997	perl_run (PL_curinterp);
		998
624	/*	999	/*
625	* this is a _very_ stripped down perl interpreter ;)	1000	* If perl-run returns we assume exit() was being called or the coro
		1001	* fell off the end, which seems to be the only valid (non-bug)
		1002	* reason for perl_run to return. We try to exit by jumping to the
		1003	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1004	* coroutine as Coro has no such concept
626	*/	1005	*/
627	PL_top_env = &PL_start_env;	1006	PL_top_env = main_top_env;
628	/* inject call to cctx_init */	1007	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
629	prepare_cctx ((coro_stack *)arg);
630
631	/* somebody will hit me for both perl_run and PL_restartop */
632	perl_run (PL_curinterp);
633
634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
635	abort ();
636	}	1008	}
637		1009
638	static coro_stack *	1010	static coro_cctx *
639	stack_new ()	1011	cctx_new ()
640	{	1012	{
641	coro_stack *stack;	1013	coro_cctx *cctx;
		1014	void *stack_start;
		1015	size_t stack_size;
642		1016
		1017	++cctx_count;
		1018
643	New (0, stack, 1, coro_stack);	1019	Newz (0, cctx, 1, coro_cctx);
644		1020
645	#if HAVE_MMAP	1021	#if HAVE_MMAP
646
647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1022	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648	/* mmap suppsedly does allocate-on-write for us */	1023	/* mmap supposedly does allocate-on-write for us */
649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1024	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650		1025
651	if (stack->sptr == (void *)-1)	1026	if (cctx->sptr != (void *)-1)
652	{
653	perror ("FATAL: unable to mmap stack for coroutine");
654	_exit (EXIT_FAILURE);
655	}	1027	{
656
657	# if STACKGUARD	1028	# if CORO_STACKGUARD
658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1029	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659	# endif	1030	# endif
660		1031	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
661	#else	1032	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
662		1033	cctx->flags |= CC_MAPPED;
663	stack->ssize = STACKSIZE * (long)sizeof (long);
664	New (0, stack->sptr, STACKSIZE, long);
665
666	if (!stack->sptr)
667	{	1034	}
		1035	else
		1036	#endif
		1037	{
		1038	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1039	New (0, cctx->sptr, coro_stacksize, long);
		1040
		1041	if (!cctx->sptr)
		1042	{
668	perror (stderr, "FATAL: unable to malloc stack for coroutine");	1043	perror ("FATAL: unable to allocate stack for coroutine");
669	_exit (EXIT_FAILURE);	1044	_exit (EXIT_FAILURE);
670	}	1045	}
671		1046
672	#endif	1047	stack_start = cctx->sptr;
		1048	stack_size = cctx->ssize;
		1049	}
673		1050
674	#if USE_VALGRIND	1051	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675	stack->valgrind_id = VALGRIND_STACK_REGISTER (	1052	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
677	stack->ssize + (char *)stack->sptr
678	);
679	#endif
680		1053
681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683	return stack;	1054	return cctx;
684	}	1055	}
685		1056
686	static void	1057	static void
687	stack_free (coro_stack *stack)	1058	cctx_destroy (coro_cctx *cctx)
688	{	1059	{
689	if (!stack)	1060	if (!cctx)
690	return;	1061	return;
691		1062
		1063	--cctx_count;
		1064
692	#if USE_VALGRIND	1065	#if CORO_USE_VALGRIND
693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);	1066	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694	#endif	1067	#endif
695		1068
696	#if HAVE_MMAP	1069	#if HAVE_MMAP
		1070	if (cctx->flags & CC_MAPPED)
697	munmap (stack->sptr, stack->ssize);	1071	munmap (cctx->sptr, cctx->ssize);
698	#else	1072	else
		1073	#endif
699	Safefree (stack->sptr);	1074	Safefree (cctx->sptr);
700	#endif
701		1075
702	Safefree (stack);	1076	Safefree (cctx);
703	}	1077	}
704		1078
705	static coro_stack *stack_first;	1079	/* wether this cctx should be destructed */
706	static int cctx_count, cctx_idle;	1080	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
707		1081
708	static coro_stack *	1082	static coro_cctx *
709	stack_get ()	1083	cctx_get (pTHX)
710	{	1084	{
711	coro_stack *stack;	1085	while (expect_true (cctx_first))
712
713	if (stack_first)
714	{	1086	{
		1087	coro_cctx *cctx = cctx_first;
		1088	cctx_first = cctx->next;
715	--cctx_idle;	1089	--cctx_idle;
716	stack = stack_first;	1090
717	stack_first = stack->next;	1091	if (expect_true (!CCTX_EXPIRED (cctx)))
718	}	1092	return cctx;
719	else	1093
720	{	1094	cctx_destroy (cctx);
721	++cctx_count;
722	stack = stack_new ();
723	PL_op = PL_op->op_next;
724	}	1095	}
725		1096
726	return stack;	1097	return cctx_new ();
727	}	1098	}
728		1099
729	static void	1100	static void
730	stack_put (coro_stack *stack)	1101	cctx_put (coro_cctx *cctx)
731	{	1102	{
		1103	/* free another cctx if overlimit */
		1104	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1105	{
		1106	coro_cctx *first = cctx_first;
		1107	cctx_first = first->next;
		1108	--cctx_idle;
		1109
		1110	cctx_destroy (first);
		1111	}
		1112
732	++cctx_idle;	1113	++cctx_idle;
733	stack->next = stack_first;	1114	cctx->next = cctx_first;
734	stack_first = stack;	1115	cctx_first = cctx;
735	}	1116	}
736		1117
737	/* never call directly, always through the coro_state_transfer global variable */	1118	/** coroutine switching *****************************************************/
		1119
		1120	static void
		1121	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1122	{
		1123	if (expect_true (prev != next))
		1124	{
		1125	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1126	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1127
		1128	if (expect_false (next->flags & CF_RUNNING))
		1129	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (expect_false (next->flags & CF_DESTROYED))
		1132	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1133
		1134	#if !PERL_VERSION_ATLEAST (5,10,0)
		1135	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1136	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1137	#endif
		1138	}
		1139	}
		1140
		1141	/* always use the TRANSFER macro */
738	static void NOINLINE	1142	static void NOINLINE
739	transfer (struct coro *prev, struct coro *next, int flags)	1143	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740	{	1144	{
741	dSTACKLEVEL;	1145	dSTACKLEVEL;
		1146	static volatile int has_throw;
742		1147
743	/* sometimes transfer is only called to set idle_sp */	1148	/* sometimes transfer is only called to set idle_sp */
744	if (flags == TRANSFER_SET_STACKLEVEL)	1149	if (expect_false (!next))
		1150	{
745	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1151	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746	else if (prev != next)	1152	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747	{	1153	}
		1154	else if (expect_true (prev != next))
		1155	{
748	coro_stack *prev__stack;	1156	coro_cctx *prev__cctx;
		1157
		1158	if (expect_false (prev->flags & CF_NEW))
		1159	{
		1160	/* create a new empty context */
		1161	Newz (0, prev->cctx, 1, coro_cctx);
		1162	prev->flags &= ~CF_NEW;
		1163	prev->flags |= CF_RUNNING;
		1164	}
		1165
		1166	prev->flags &= ~CF_RUNNING;
		1167	next->flags |= CF_RUNNING;
749		1168
750	LOCK;	1169	LOCK;
751		1170
752	if (next->mainstack)	1171	/* first get rid of the old state */
		1172	save_perl (aTHX_ prev);
		1173
		1174	if (expect_false (next->flags & CF_NEW))
753	{	1175	{
754	/* coroutine already started */	1176	/* need to start coroutine */
755	SAVE (prev, flags);	1177	next->flags &= ~CF_NEW;
756	LOAD (next);	1178	/* setup coroutine call */
		1179	coro_setup (aTHX_ next);
757	}	1180	}
758	else	1181	else
		1182	load_perl (aTHX_ next);
		1183
		1184	prev__cctx = prev->cctx;
		1185
		1186	/* possibly "free" the cctx */
		1187	if (expect_true (
		1188	prev__cctx->idle_sp == STACKLEVEL
		1189	&& !(prev__cctx->flags & CC_TRACE)
		1190	&& !force_cctx
		1191	))
759	{	1192	{
760	/* need to start coroutine */	1193	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761	/* first get rid of the old state */	1194	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762	SAVE (prev, -1);	1195
763	/* setup coroutine call */	1196	prev->cctx = 0;
764	setup_coro (next);	1197
765	/* need a stack */	1198	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766	next->stack = 0;	1199	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1200	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1201	if (!next->cctx)
		1202	next->cctx = cctx_get (aTHX);
		1203
		1204	cctx_put (prev__cctx);
767	}	1205	}
768		1206
769	if (!prev->stack)	1207	++next->usecount;
770	/* create a new empty context */
771	Newz (0, prev->stack, 1, coro_stack);
772		1208
773	prev__stack = prev->stack;	1209	if (expect_true (!next->cctx))
		1210	next->cctx = cctx_get (aTHX);
774		1211
775	/* possibly "free" the stack */	1212	has_throw = !!next->throw;
776	if (prev__stack->idle_sp == STACKLEVEL)	1213
		1214	if (expect_false (prev__cctx != next->cctx))
777	{	1215	{
778	stack_put (prev__stack);	1216	prev__cctx->top_env = PL_top_env;
779	prev->stack = 0;	1217	PL_top_env = next->cctx->top_env;
		1218	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780	}	1219	}
781		1220
782	if (!next->stack)	1221	free_coro_mortal (aTHX);
783	next->stack = stack_get ();	1222	UNLOCK;
784		1223
785	if (prev__stack != next->stack)	1224	if (expect_false (has_throw))
786	{	1225	{
787	prev__stack->top_env = PL_top_env;	1226	struct coro *coro = SvSTATE (coro_current);
788	PL_top_env = next->stack->top_env;	1227
789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1228	if (coro->throw)
		1229	{
		1230	SV *exception = coro->throw;
		1231	coro->throw = 0;
		1232	sv_setsv (ERRSV, exception);
		1233	croak (0);
		1234	}
790	}	1235	}
		1236	}
		1237	}
791		1238
792	free_coro_mortal ();	1239	struct transfer_args
		1240	{
		1241	struct coro *prev, *next;
		1242	};
793		1243
		1244	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1245	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1246
		1247	/** high level stuff ********************************************************/
		1248
		1249	static int
		1250	coro_state_destroy (pTHX_ struct coro *coro)
		1251	{
		1252	if (coro->flags & CF_DESTROYED)
		1253	return 0;
		1254
		1255	coro->flags |= CF_DESTROYED;
		1256
		1257	if (coro->flags & CF_READY)
		1258	{
		1259	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1260	/* alternative: look through all ready queues and remove the coro */
		1261	LOCK;
		1262	--coro_nready;
794	UNLOCK;	1263	UNLOCK;
795	}	1264	}
796	}	1265	else
797		1266	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798	struct transfer_args
799	{
800	struct coro *prev, *next;
801	int flags;
802	};
803
804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
805
806	static void
807	coro_state_destroy (struct coro *coro)
808	{
809	if (coro->refcnt--)
810	return;
811		1267
812	if (coro->mainstack && coro->mainstack != main_mainstack)	1268	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	1269	{
814	struct coro temp;	1270	struct coro temp;
815		1271
816	SAVE ((&temp), TRANSFER_SAVE_ALL);	1272	if (coro->flags & CF_RUNNING)
817	LOAD (coro);	1273	croak ("FATAL: tried to destroy currently running coroutine");
818		1274
819	coro_destroy_stacks ();	1275	save_perl (aTHX_ &temp);
		1276	load_perl (aTHX_ coro);
820		1277
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1278	coro_destroy (aTHX_ coro);
822		1279
		1280	load_perl (aTHX_ &temp);
		1281
823	coro->mainstack = 0;	1282	coro->slot = 0;
824	}	1283	}
825		1284
826	stack_free (coro->stack);	1285	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	1286	SvREFCNT_dec (coro->args);
828	Safefree (coro);	1287
		1288	if (coro->next) coro->next->prev = coro->prev;
		1289	if (coro->prev) coro->prev->next = coro->next;
		1290	if (coro == coro_first) coro_first = coro->next;
		1291
		1292	return 1;
829	}	1293	}
830		1294
831	static int	1295	static int
832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1296	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833	{	1297	{
834	struct coro *coro = (struct coro *)mg->mg_ptr;	1298	struct coro *coro = (struct coro *)mg->mg_ptr;
835	mg->mg_ptr = 0;	1299	mg->mg_ptr = 0;
836		1300
		1301	coro->hv = 0;
		1302
		1303	if (--coro->refcnt < 0)
		1304	{
837	coro_state_destroy (coro);	1305	coro_state_destroy (aTHX_ coro);
		1306	Safefree (coro);
		1307	}
838		1308
839	return 0;	1309	return 0;
840	}	1310	}
841		1311
842	static int	1312	static int
…		…
849	return 0;	1319	return 0;
850	}	1320	}
851		1321
852	static MGVTBL coro_state_vtbl = {	1322	static MGVTBL coro_state_vtbl = {
853	0, 0, 0, 0,	1323	0, 0, 0, 0,
854	coro_state_clear,	1324	coro_state_free,
855	0,	1325	0,
856	#ifdef MGf_DUP	1326	#ifdef MGf_DUP
857	coro_state_dup,	1327	coro_state_dup,
858	#else	1328	#else
859	# define MGf_DUP 0	1329	# define MGf_DUP 0
860	#endif	1330	#endif
861	};	1331	};
862		1332
863	static struct coro *
864	SvSTATE (SV *coro)
865	{
866	HV *stash;
867	MAGIC *mg;
868
869	if (SvROK (coro))
870	coro = SvRV (coro);
871
872	stash = SvSTASH (coro);
873	if (stash != coro_stash && stash != coro_state_stash)
874	{
875	/* very slow, but rare, check */
876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877	croak ("Coro::State object required");
878	}
879
880	mg = SvMAGIC (coro);
881	assert (mg->mg_type == PERL_MAGIC_ext);
882	return (struct coro *)mg->mg_ptr;
883	}
884
885	static void	1333	static void
886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1334	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887	{	1335	{
888	ta->prev = SvSTATE (prev);	1336	ta->prev = SvSTATE (prev_sv);
889	ta->next = SvSTATE (next);	1337	ta->next = SvSTATE (next_sv);
890	ta->flags = flags;	1338	TRANSFER_CHECK (*ta);
891	}	1339	}
892		1340
893	static void	1341	static void
894	api_transfer (SV *prev, SV *next, int flags)	1342	api_transfer (SV *prev_sv, SV *next_sv)
895	{	1343	{
896	dTHX;	1344	dTHX;
897	struct transfer_args ta;	1345	struct transfer_args ta;
898		1346
899	prepare_transfer (&ta, prev, next, flags);	1347	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1348	TRANSFER (ta, 1);
901	}	1349	}
902		1350
903	/** Coro ********************************************************************/	1351	/** Coro ********************************************************************/
904		1352
905	#define PRIO_MAX 3
906	#define PRIO_HIGH 1
907	#define PRIO_NORMAL 0
908	#define PRIO_LOW -1
909	#define PRIO_IDLE -3
910	#define PRIO_MIN -4
911
912	/* for Coro.pm */
913	static GV *coro_current, *coro_idle;
914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915	static int coro_nready;
916
917	static void	1353	static void
918	coro_enq (SV *sv)	1354	coro_enq (pTHX_ SV *coro_sv)
		1355	{
		1356	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1357	}
		1358
		1359	static SV *
		1360	coro_deq (pTHX)
919	{	1361	{
920	int prio;	1362	int prio;
921		1363
922	if (SvTYPE (sv) != SVt_PVHV)
923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925	prio = SvSTATE (sv)->prio;
926
927	av_push (coro_ready [prio - PRIO_MIN], sv);
928	coro_nready++;
929	}
930
931	static SV *
932	coro_deq (int min_prio)
933	{
934	int prio = PRIO_MAX - PRIO_MIN;
935
936	min_prio -= PRIO_MIN;
937	if (min_prio < 0)
938	min_prio = 0;
939
940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1364	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941	if (AvFILLp (coro_ready [prio]) >= 0)	1365	if (AvFILLp (coro_ready [prio]) >= 0)
942	{
943	coro_nready--;
944	return av_shift (coro_ready [prio]);	1366	return av_shift (coro_ready [prio]);
945	}
946		1367
947	return 0;	1368	return 0;
948	}	1369	}
949		1370
		1371	static int
		1372	api_ready (SV *coro_sv)
		1373	{
		1374	dTHX;
		1375	struct coro *coro;
		1376
		1377	if (SvROK (coro_sv))
		1378	coro_sv = SvRV (coro_sv);
		1379
		1380	coro = SvSTATE (coro_sv);
		1381
		1382	if (coro->flags & CF_READY)
		1383	return 0;
		1384
		1385	coro->flags |= CF_READY;
		1386
		1387	LOCK;
		1388	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1389	++coro_nready;
		1390	UNLOCK;
		1391
		1392	return 1;
		1393	}
		1394
		1395	static int
		1396	api_is_ready (SV *coro_sv)
		1397	{
		1398	dTHX;
		1399	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1400	}
		1401
950	static void	1402	static void
951	api_ready (SV *coro)	1403	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1404	{
953	dTHX;	1405	SV *prev_sv, *next_sv;
954		1406
955	if (SvROK (coro))	1407	for (;;)
956	coro = SvRV (coro);	1408	{
		1409	LOCK;
		1410	next_sv = coro_deq (aTHX);
		1411
		1412	/* nothing to schedule: call the idle handler */
		1413	if (expect_false (!next_sv))
		1414	{
		1415	dSP;
		1416	UNLOCK;
		1417
		1418	ENTER;
		1419	SAVETMPS;
		1420
		1421	PUSHMARK (SP);
		1422	PUTBACK;
		1423	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1424	SPAGAIN;
		1425
		1426	FREETMPS;
		1427	LEAVE;
		1428	continue;
		1429	}
		1430
		1431	ta->next = SvSTATE (next_sv);
		1432
		1433	/* cannot transfer to destroyed coros, skip and look for next */
		1434	if (expect_false (ta->next->flags & CF_DESTROYED))
		1435	{
		1436	UNLOCK;
		1437	SvREFCNT_dec (next_sv);
		1438	/* coro_nready is already taken care of by destroy */
		1439	continue;
		1440	}
		1441
		1442	--coro_nready;
		1443	UNLOCK;
		1444	break;
		1445	}
		1446
		1447	/* free this only after the transfer */
		1448	prev_sv = SvRV (coro_current);
		1449	ta->prev = SvSTATE (prev_sv);
		1450	TRANSFER_CHECK (*ta);
		1451	assert (ta->next->flags & CF_READY);
		1452	ta->next->flags &= ~CF_READY;
		1453	SvRV_set (coro_current, next_sv);
957		1454
958	LOCK;	1455	LOCK;
959	coro_enq (SvREFCNT_inc (coro));	1456	free_coro_mortal (aTHX);
		1457	coro_mortal = prev_sv;
960	UNLOCK;	1458	UNLOCK;
961	}	1459	}
962		1460
963	static void	1461	static void
964	prepare_schedule (struct transfer_args *ta)
965	{
966	SV *current, *prev, *next;
967
968	current = GvSV (coro_current);
969
970	for (;;)
971	{
972	LOCK;
973	next = coro_deq (PRIO_MIN);
974	UNLOCK;
975
976	if (next)
977	break;
978
979	{
980	dSP;
981
982	ENTER;
983	SAVETMPS;
984
985	PUSHMARK (SP);
986	PUTBACK;
987	call_sv (GvSV (coro_idle), G_DISCARD);
988
989	FREETMPS;
990	LEAVE;
991	}
992	}
993
994	prev = SvRV (current);
995	SvRV (current) = next;
996
997	/* free this only after the transfer */
998	LOCK;
999	free_coro_mortal ();
1000	UNLOCK;
1001	coro_mortal = prev;
1002
1003	ta->prev = SvSTATE (prev);
1004	ta->next = SvSTATE (next);
1005	ta->flags = TRANSFER_SAVE_ALL;
1006	}
1007
1008	static void
1009	prepare_cede (struct transfer_args *ta)	1462	prepare_cede (pTHX_ struct transfer_args *ta)
1010	{	1463	{
1011	LOCK;	1464	api_ready (coro_current);
1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013	UNLOCK;
1014
1015	prepare_schedule (ta);	1465	prepare_schedule (aTHX_ ta);
		1466	}
		1467
		1468	static int
		1469	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1470	{
		1471	if (coro_nready)
		1472	{
		1473	SV *prev = SvRV (coro_current);
		1474	prepare_schedule (aTHX_ ta);
		1475	api_ready (prev);
		1476	return 1;
		1477	}
		1478	else
		1479	return 0;
1016	}	1480	}
1017		1481
1018	static void	1482	static void
1019	api_schedule (void)	1483	api_schedule (void)
1020	{	1484	{
1021	dTHX;	1485	dTHX;
1022	struct transfer_args ta;	1486	struct transfer_args ta;
1023		1487
1024	prepare_schedule (&ta);	1488	prepare_schedule (aTHX_ &ta);
1025	TRANSFER (ta);	1489	TRANSFER (ta, 1);
1026	}	1490	}
1027		1491
1028	static void	1492	static int
1029	api_cede (void)	1493	api_cede (void)
1030	{	1494	{
1031	dTHX;	1495	dTHX;
1032	struct transfer_args ta;	1496	struct transfer_args ta;
1033		1497
1034	prepare_cede (&ta);	1498	prepare_cede (aTHX_ &ta);
		1499
		1500	if (expect_true (ta.prev != ta.next))
		1501	{
1035	TRANSFER (ta);	1502	TRANSFER (ta, 1);
		1503	return 1;
		1504	}
		1505	else
		1506	return 0;
1036	}	1507	}
1037		1508
		1509	static int
		1510	api_cede_notself (void)
		1511	{
		1512	dTHX;
		1513	struct transfer_args ta;
		1514
		1515	if (prepare_cede_notself (aTHX_ &ta))
		1516	{
		1517	TRANSFER (ta, 1);
		1518	return 1;
		1519	}
		1520	else
		1521	return 0;
		1522	}
		1523
		1524	static void
		1525	api_trace (SV *coro_sv, int flags)
		1526	{
		1527	dTHX;
		1528	struct coro *coro = SvSTATE (coro_sv);
		1529
		1530	if (flags & CC_TRACE)
		1531	{
		1532	if (!coro->cctx)
		1533	coro->cctx = cctx_new ();
		1534	else if (!(coro->cctx->flags & CC_TRACE))
		1535	croak ("cannot enable tracing on coroutine with custom stack");
		1536
		1537	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1538	}
		1539	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1540	{
		1541	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1542
		1543	if (coro->flags & CF_RUNNING)
		1544	PL_runops = RUNOPS_DEFAULT;
		1545	else
		1546	coro->slot->runops = RUNOPS_DEFAULT;
		1547	}
		1548	}
		1549
1038	MODULE = Coro::State PACKAGE = Coro::State	1550	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039		1551
1040	PROTOTYPES: DISABLE	1552	PROTOTYPES: DISABLE
1041		1553
1042	BOOT:	1554	BOOT:
1043	{	1555	{
1044	#ifdef USE_ITHREADS	1556	#ifdef USE_ITHREADS
1045	MUTEX_INIT (&coro_mutex);	1557	MUTEX_INIT (&coro_mutex);
1046	#endif	1558	#endif
1047	BOOT_PAGESIZE;	1559	BOOT_PAGESIZE;
1048		1560
		1561	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1562	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1563
		1564	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1565	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1566	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1567	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1568
		1569	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1570	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1571	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1572
1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1573	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050		1574
1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1578	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054		1579
1055	main_mainstack = PL_mainstack;	1580	main_mainstack = PL_mainstack;
		1581	main_top_env = PL_top_env;
		1582
		1583	while (main_top_env->je_prev)
		1584	main_top_env = main_top_env->je_prev;
1056		1585
1057	coroapi.ver = CORO_API_VERSION;	1586	coroapi.ver = CORO_API_VERSION;
		1587	coroapi.rev = CORO_API_REVISION;
1058	coroapi.transfer = api_transfer;	1588	coroapi.transfer = api_transfer;
1059		1589
1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1590	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061	}	1591	}
1062		1592
1063	SV *	1593	SV *
1064	new (char *klass, ...)	1594	new (char *klass, ...)
1065	CODE:	1595	CODE:
1066	{	1596	{
1067	struct coro *coro;	1597	struct coro *coro;
		1598	MAGIC *mg;
1068	HV *hv;	1599	HV *hv;
1069	int i;	1600	int i;
1070		1601
1071	Newz (0, coro, 1, struct coro);	1602	Newz (0, coro, 1, struct coro);
1072	coro->args = newAV ();	1603	coro->args = newAV ();
		1604	coro->flags = CF_NEW;
1073		1605
		1606	if (coro_first) coro_first->prev = coro;
		1607	coro->next = coro_first;
		1608	coro_first = coro;
		1609
1074	hv = newHV ();	1610	coro->hv = hv = newHV ();
1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1611	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1612	mg->mg_flags |= MGf_DUP;
1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1613	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077		1614
		1615	av_extend (coro->args, items - 1);
1078	for (i = 1; i < items; i++)	1616	for (i = 1; i < items; i++)
1079	av_push (coro->args, newSVsv (ST (i)));	1617	av_push (coro->args, newSVsv (ST (i)));
1080
1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1082	/*coro->stack = 0;*/
1083	}	1618	}
1084	OUTPUT:	1619	OUTPUT:
1085	RETVAL	1620	RETVAL
1086		1621
		1622	# these not obviously related functions are all rolled into the same xs
		1623	# function to increase chances that they all will call transfer with the same
		1624	# stack offset
1087	void	1625	void
1088	_set_stacklevel (...)	1626	_set_stacklevel (...)
1089	ALIAS:	1627	ALIAS:
1090	Coro::State::transfer = 1	1628	Coro::State::transfer = 1
1091	Coro::schedule = 2	1629	Coro::schedule = 2
1092	Coro::cede = 3	1630	Coro::cede = 3
1093	Coro::Cont::yield = 4	1631	Coro::cede_notself = 4
1094	CODE:	1632	CODE:
1095	{	1633	{
1096	struct transfer_args ta;	1634	struct transfer_args ta;
1097		1635
		1636	PUTBACK;
1098	switch (ix)	1637	switch (ix)
1099	{	1638	{
1100	case 0:	1639	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1640	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1641	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1642	break;
1105		1643
1106	case 1:	1644	case 1:
1107	if (items != 3)	1645	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1646	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1647
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1648	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1649	break;
1112		1650
1113	case 2:	1651	case 2:
1114	prepare_schedule (&ta);	1652	prepare_schedule (aTHX_ &ta);
1115	break;	1653	break;
1116		1654
1117	case 3:	1655	case 3:
1118	prepare_cede (&ta);	1656	prepare_cede (aTHX_ &ta);
1119	break;	1657	break;
1120		1658
1121	case 4:	1659	case 4:
1122	{	1660	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1661	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1662
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1663	break;
1146
1147	}	1664	}
		1665	SPAGAIN;
1148		1666
		1667	BARRIER;
		1668	PUTBACK;
1149	TRANSFER (ta);	1669	TRANSFER (ta, 0);
		1670	SPAGAIN; /* might be the sp of a different coroutine now */
		1671	/* be extra careful not to ever do anything after TRANSFER */
1150	}	1672	}
1151		1673
1152	void	1674	bool
1153	_clone_state_from (SV *dst, SV *src)	1675	_destroy (SV *coro_sv)
1154	CODE:	1676	CODE:
1155	{	1677	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1678	OUTPUT:
1157		1679	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162	}
1163		1680
1164	void	1681	void
1165	_exit (code)	1682	_exit (code)
1166	int code	1683	int code
1167	PROTOTYPE: $	1684	PROTOTYPE: $
1168	CODE:	1685	CODE:
1169	_exit (code);	1686	_exit (code);
1170		1687
		1688	int
		1689	cctx_stacksize (int new_stacksize = 0)
		1690	CODE:
		1691	RETVAL = coro_stacksize;
		1692	if (new_stacksize)
		1693	coro_stacksize = new_stacksize;
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	int
		1698	cctx_count ()
		1699	CODE:
		1700	RETVAL = cctx_count;
		1701	OUTPUT:
		1702	RETVAL
		1703
		1704	int
		1705	cctx_idle ()
		1706	CODE:
		1707	RETVAL = cctx_idle;
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	void
		1712	list ()
		1713	PPCODE:
		1714	{
		1715	struct coro *coro;
		1716	for (coro = coro_first; coro; coro = coro->next)
		1717	if (coro->hv)
		1718	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1719	}
		1720
		1721	void
		1722	call (Coro::State coro, SV *coderef)
		1723	ALIAS:
		1724	eval = 1
		1725	CODE:
		1726	{
		1727	if (coro->mainstack)
		1728	{
		1729	struct coro temp;
		1730
		1731	if (!(coro->flags & CF_RUNNING))
		1732	{
		1733	PUTBACK;
		1734	save_perl (aTHX_ &temp);
		1735	load_perl (aTHX_ coro);
		1736	}
		1737
		1738	{
		1739	dSP;
		1740	ENTER;
		1741	SAVETMPS;
		1742	PUTBACK;
		1743	PUSHSTACK;
		1744	PUSHMARK (SP);
		1745
		1746	if (ix)
		1747	eval_sv (coderef, 0);
		1748	else
		1749	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1750
		1751	POPSTACK;
		1752	SPAGAIN;
		1753	FREETMPS;
		1754	LEAVE;
		1755	PUTBACK;
		1756	}
		1757
		1758	if (!(coro->flags & CF_RUNNING))
		1759	{
		1760	save_perl (aTHX_ coro);
		1761	load_perl (aTHX_ &temp);
		1762	SPAGAIN;
		1763	}
		1764	}
		1765	}
		1766
		1767	SV *
		1768	is_ready (Coro::State coro)
		1769	PROTOTYPE: $
		1770	ALIAS:
		1771	is_ready = CF_READY
		1772	is_running = CF_RUNNING
		1773	is_new = CF_NEW
		1774	is_destroyed = CF_DESTROYED
		1775	CODE:
		1776	RETVAL = boolSV (coro->flags & ix);
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	void
		1781	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1782
		1783	SV *
		1784	has_stack (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = boolSV (!!coro->cctx);
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	int
		1792	is_traced (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	IV
		1800	rss (Coro::State coro)
		1801	PROTOTYPE: $
		1802	ALIAS:
		1803	usecount = 1
		1804	CODE:
		1805	switch (ix)
		1806	{
		1807	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1808	case 1: RETVAL = coro->usecount; break;
		1809	}
		1810	OUTPUT:
		1811	RETVAL
		1812
		1813	void
		1814	force_cctx ()
		1815	CODE:
		1816	struct coro *coro = SvSTATE (coro_current);
		1817	coro->cctx->idle_sp = 0;
		1818
1171	MODULE = Coro::State PACKAGE = Coro	1819	MODULE = Coro::State PACKAGE = Coro
1172		1820
1173	BOOT:	1821	BOOT:
1174	{	1822	{
1175	int i;	1823	int i;
1176		1824
		1825	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1826	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1827	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1828
		1829	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1830	SvREADONLY_on (coro_current);
		1831
1177	coro_stash = gv_stashpv ("Coro", TRUE);	1832	coro_stash = gv_stashpv ("Coro", TRUE);
1178		1833
1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1834	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1835	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1836	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1837	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1838	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1839	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1840
1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1841	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1842	coro_ready[i] = newAV ();
1191		1843
1192	{	1844	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1845	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1846	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194		1847
1195	coroapi.schedule = api_schedule;	1848	coroapi.schedule = api_schedule;
1196	coroapi.cede = api_cede;	1849	coroapi.cede = api_cede;
		1850	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1851	coroapi.ready = api_ready;
		1852	coroapi.is_ready = api_is_ready;
1198	coroapi.nready = &coro_nready;	1853	coroapi.nready = &coro_nready;
1199	coroapi.current = coro_current;	1854	coroapi.current = coro_current;
1200		1855
1201	GCoroAPI = &coroapi;	1856	GCoroAPI = &coroapi;
1202	sv_setiv (sv, (IV)&coroapi);	1857	sv_setiv (sv, (IV)&coroapi);
1203	SvREADONLY_on (sv);	1858	SvREADONLY_on (sv);
1204	}	1859	}
1205	}	1860	}
		1861
		1862	void
		1863	_set_current (SV *current)
		1864	PROTOTYPE: $
		1865	CODE:
		1866	SvREFCNT_dec (SvRV (coro_current));
		1867	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1206		1868
1207	int	1869	int
1208	prio (Coro::State coro, int newprio = 0)	1870	prio (Coro::State coro, int newprio = 0)
1209	ALIAS:	1871	ALIAS:
1210	nice = 1	1872	nice = 1
…		…
1213	RETVAL = coro->prio;	1875	RETVAL = coro->prio;
1214		1876
1215	if (items > 1)	1877	if (items > 1)
1216	{	1878	{
1217	if (ix)	1879	if (ix)
1218	newprio += coro->prio;	1880	newprio = coro->prio - newprio;
1219		1881
1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1882	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1883	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222		1884
1223	coro->prio = newprio;	1885	coro->prio = newprio;
1224	}	1886	}
1225	}	1887	}
		1888	OUTPUT:
		1889	RETVAL
1226		1890
1227	void	1891	SV *
1228	ready (SV *self)	1892	ready (SV *self)
1229	PROTOTYPE: $	1893	PROTOTYPE: $
1230	CODE:	1894	CODE:
1231	api_ready (self);	1895	RETVAL = boolSV (api_ready (self));
		1896	OUTPUT:
		1897	RETVAL
1232		1898
1233	int	1899	int
1234	nready (...)	1900	nready (...)
1235	PROTOTYPE:	1901	PROTOTYPE:
1236	CODE:	1902	CODE:
1237	RETVAL = coro_nready;	1903	RETVAL = coro_nready;
1238	OUTPUT:	1904	OUTPUT:
1239	RETVAL	1905	RETVAL
1240		1906
		1907	void
		1908	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1909	PROTOTYPE: $;$
		1910	CODE:
		1911	SvREFCNT_dec (self->throw);
		1912	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1913
		1914	void
		1915	swap_defsv (Coro::State self)
		1916	PROTOTYPE: $
		1917	ALIAS:
		1918	swap_defav = 1
		1919	CODE:
		1920	if (!self->slot)
		1921	croak ("cannot swap state with coroutine that has no saved state");
		1922	else
		1923	{
		1924	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1925	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1926
		1927	SV *tmp = *src; *src = *dst; *dst = tmp;
		1928	}
		1929
		1930	# for async_pool speedup
		1931	void
		1932	_pool_1 (SV *cb)
		1933	CODE:
		1934	{
		1935	struct coro *coro = SvSTATE (coro_current);
		1936	HV *hv = (HV *)SvRV (coro_current);
		1937	AV *defav = GvAV (PL_defgv);
		1938	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1939	AV *invoke_av;
		1940	int i, len;
		1941
		1942	if (!invoke)
		1943	{
		1944	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1945	croak ("\3async_pool terminate\2\n");
		1946	}
		1947
		1948	SvREFCNT_dec (coro->saved_deffh);
		1949	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1950
		1951	hv_store (hv, "desc", sizeof ("desc") - 1,
		1952	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1953
		1954	invoke_av = (AV *)SvRV (invoke);
		1955	len = av_len (invoke_av);
		1956
		1957	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1958
		1959	if (len > 0)
		1960	{
		1961	av_fill (defav, len - 1);
		1962	for (i = 0; i < len; ++i)
		1963	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1964	}
		1965
		1966	SvREFCNT_dec (invoke);
		1967	}
		1968
		1969	void
		1970	_pool_2 (SV *cb)
		1971	CODE:
		1972	{
		1973	struct coro *coro = SvSTATE (coro_current);
		1974
		1975	sv_setsv (cb, &PL_sv_undef);
		1976
		1977	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1978	coro->saved_deffh = 0;
		1979
		1980	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1981	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1982	{
		1983	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1984	croak ("\3async_pool terminate\2\n");
		1985	}
		1986
		1987	av_clear (GvAV (PL_defgv));
		1988	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1989	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1990
		1991	coro->prio = 0;
		1992
		1993	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1994	api_trace (coro_current, 0);
		1995
		1996	av_push (av_async_pool, newSVsv (coro_current));
		1997	}
		1998
		1999
1241	MODULE = Coro::State PACKAGE = Coro::AIO	2000	MODULE = Coro::State PACKAGE = Coro::AIO
1242		2001
1243	SV *	2002	SV *
1244	_get_state ()	2003	_get_state ()
1245	CODE:	2004	CODE:
1246	{	2005	{
1247	struct {	2006	struct io_state *data;
1248	int errorno;
1249	int laststype;
1250	int laststatval;
1251	Stat_t statcache;
1252	} data;
1253		2007
		2008	RETVAL = newSV (sizeof (struct io_state));
		2009	data = (struct io_state *)SvPVX (RETVAL);
		2010	SvCUR_set (RETVAL, sizeof (struct io_state));
		2011	SvPOK_only (RETVAL);
		2012
1254	data.errorno = errno;	2013	data->errorno = errno;
1255	data.laststype = PL_laststype;	2014	data->laststype = PL_laststype;
1256	data.laststatval = PL_laststatval;	2015	data->laststatval = PL_laststatval;
1257	data.statcache = PL_statcache;	2016	data->statcache = PL_statcache;
1258
1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
1260	}	2017	}
1261	OUTPUT:	2018	OUTPUT:
1262	RETVAL	2019	RETVAL
1263		2020
1264	void	2021	void
1265	_set_state (char *data_)	2022	_set_state (char *data_)
1266	PROTOTYPE: $	2023	PROTOTYPE: $
1267	CODE:	2024	CODE:
1268	{	2025	{
1269	struct {	2026	struct io_state *data = (void *)data_;
1270	int errorno;
1271	int laststype;
1272	int laststatval;
1273	Stat_t statcache;
1274	} *data = (void *)data_;
1275		2027
1276	errno = data->errorno;	2028	errno = data->errorno;
1277	PL_laststype = data->laststype;	2029	PL_laststype = data->laststype;
1278	PL_laststatval = data->laststatval;	2030	PL_laststatval = data->laststatval;
1279	PL_statcache = data->statcache;	2031	PL_statcache = data->statcache;
1280	}	2032	}
		2033

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines