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Comparing Coro/Coro/State.xs (file contents):
Revision 1.16 by root, Wed Jul 25 04:26:55 2001 UTC vs.
Revision 1.288 by root, Mon Nov 17 07:14:50 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.h> 28# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
13# else 32# else
14# undef HAVE_MMAP 33# undef HAVE_MMAP
15# endif 34# endif
16# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
17#endif 43# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 44#else
30# define TRANSFER_LAZY_STACK 0x00000000 45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
31#endif 65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
32 82
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 83/* 5.11 */
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
35 87
36#define SUB_INIT "Coro::State::initialize" 88/* 5.10.0 */
37#define UCORO_STATE "_coro_state" 89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
38 92
39/* The next macro should delcare a variable stacklevel that contains and approximation 93/* 5.8.8 */
40 * to the current C stack pointer. It's property is that it changes with each call 94#ifndef GV_NOTQUAL
41 * and should be unique. */ 95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
126#else
42#define dSTACKLEVEL void *stacklevel = &stacklevel 127# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
128#endif
43 129
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 130#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 131
46/* this is actually not only the c stack but also c registers etc... */ 132#if __GNUC__ >= 3
133# define attribute(x) __attribute__(x)
134# define expect(expr,value) __builtin_expect ((expr),(value))
135# define INLINE static inline
136#else
137# define attribute(x)
138# define expect(expr,value) (expr)
139# define INLINE static
140#endif
141
142#define expect_false(expr) expect ((expr) != 0, 0)
143#define expect_true(expr) expect ((expr) != 0, 1)
144
145#define NOINLINE attribute ((noinline))
146
147#include "CoroAPI.h"
148
149#ifdef USE_ITHREADS
150# if CORO_PTHREAD
151static void *coro_thx;
152# endif
153#endif
154
155static double (*nvtime)(); /* so why doesn't it take void? */
156
157static U32 cctx_gen;
158static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
191/* this is a structure representing a c-level coroutine */
47typedef struct { 192typedef struct coro_cctx
48 int refcnt; /* pointer reference counter */ 193{
49 int usecnt; /* shared by how many coroutines */ 194 struct coro_cctx *next;
50 int gencnt; /* generation counter */
51 195
196 /* the stack */
197 void *sptr;
198 size_t ssize;
199
200 /* cpu state */
201 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
202 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
203 JMPENV *top_env;
52 coro_context cctx; 204 coro_context cctx;
53 205
54 void *sptr; 206 U32 gen;
55 long ssize; /* positive == mmap, otherwise malloc */ 207#if CORO_USE_VALGRIND
56} coro_stack; 208 int valgrind_id;
209#endif
210 unsigned char flags;
211} coro_cctx;
57 212
58static coro_stack main_stack = { 1, 0, 0 }; 213enum {
214 CF_RUNNING = 0x0001, /* coroutine is running */
215 CF_READY = 0x0002, /* coroutine is ready */
216 CF_NEW = 0x0004, /* has never been switched to */
217 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
218};
59 219
220/* the structure where most of the perl state is stored, overlaid on the cxstack */
221typedef struct
222{
223 SV *defsv;
224 AV *defav;
225 SV *errsv;
226 SV *irsgv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
231
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233
234/* this is a structure representing a perl-level coroutine */
60struct coro { 235struct coro {
61 /* the optional C context */ 236 /* the C coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 237 coro_cctx *cctx;
63 void *cursp;
64 int gencnt;
65 238
66 /* optionally saved, might be zero */ 239 /* state data */
67 AV *defav; 240 struct CoroSLF slf_frame; /* saved slf frame */
68 SV *defsv;
69 SV *errsv;
70
71 /* saved global state not related to stacks */
72 U8 dowarn;
73
74 /* the stacks and related info (callchain etc..) */
75 PERL_SI *curstackinfo;
76 AV *curstack;
77 AV *mainstack; 241 AV *mainstack;
78 SV **stack_sp; 242 perl_slots *slot; /* basically the saved sp */
79 OP *op;
80 SV **curpad;
81 SV **stack_base;
82 SV **stack_max;
83 SV **tmps_stack;
84 I32 tmps_floor;
85 I32 tmps_ix;
86 I32 tmps_max;
87 I32 *markstack;
88 I32 *markstack_ptr;
89 I32 *markstack_max;
90 I32 *scopestack;
91 I32 scopestack_ix;
92 I32 scopestack_max;
93 ANY *savestack;
94 I32 savestack_ix;
95 I32 savestack_max;
96 OP **retstack;
97 I32 retstack_ix;
98 I32 retstack_max;
99 COP *curcop;
100 JMPENV start_env;
101 JMPENV *top_env;
102 243
103 /* data associated with this coroutine (initial args) */ 244 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 245 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */
248 void (*on_destroy)(pTHX_ struct coro *coro);
249
250 /* statistics */
251 int usecount; /* number of transfers to this coro */
252
253 /* coro process data */
254 int prio;
255 SV *throw; /* exception to be thrown */
256
257 /* async_pool */
258 SV *saved_deffh;
259
260 /* linked list */
261 struct coro *next, *prev;
105}; 262};
106 263
107typedef struct coro *Coro__State; 264typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 265typedef struct coro *Coro__State_or_hashref;
109 266
110static AV *main_mainstack; /* used to differentiate between $main and others */ 267/* the following variables are effectively part of the perl context */
111static HV *coro_state_stash; 268/* and get copied between struct coro and these variables */
269/* the mainr easonw e don't support windows process emulation */
270static struct CoroSLF slf_frame; /* the current slf frame */
112static SV *ucoro_state_sv; 271static SV *coro_throw;
113static U32 ucoro_state_hash;
114static HV *padlist_cache;
115 272
116/* mostly copied from op.c:cv_clone2 */ 273/** Coro ********************************************************************/
117STATIC AV * 274
118clone_padlist (AV *protopadlist) 275#define PRIO_MAX 3
276#define PRIO_HIGH 1
277#define PRIO_NORMAL 0
278#define PRIO_LOW -1
279#define PRIO_IDLE -3
280#define PRIO_MIN -4
281
282/* for Coro.pm */
283static SV *coro_current;
284static SV *coro_readyhook;
285static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
286static struct coro *coro_first;
287#define coro_nready coroapi.nready
288
289/** lowlevel stuff **********************************************************/
290
291static SV *
292coro_get_sv (pTHX_ const char *name, int create)
119{ 293{
120 AV *av; 294#if PERL_VERSION_ATLEAST (5,10,0)
121 I32 ix; 295 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 296 get_sv (name, create);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 297#endif
124 SV **pname = AvARRAY (protopad_name); 298 return get_sv (name, create);
125 SV **ppad = AvARRAY (protopad); 299}
126 I32 fname = AvFILLp (protopad_name); 300
127 I32 fpad = AvFILLp (protopad); 301static AV *
302coro_get_av (pTHX_ const char *name, int create)
303{
304#if PERL_VERSION_ATLEAST (5,10,0)
305 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
306 get_av (name, create);
307#endif
308 return get_av (name, create);
309}
310
311static HV *
312coro_get_hv (pTHX_ const char *name, int create)
313{
314#if PERL_VERSION_ATLEAST (5,10,0)
315 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
316 get_hv (name, create);
317#endif
318 return get_hv (name, create);
319}
320
321static AV *
322coro_clone_padlist (pTHX_ CV *cv)
323{
324 AV *padlist = CvPADLIST (cv);
128 AV *newpadlist, *newpad_name, *newpad; 325 AV *newpadlist, *newpad;
129 SV **npad;
130
131 newpad_name = newAV ();
132 for (ix = fname; ix >= 0; ix--)
133 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135 newpad = newAV ();
136 av_fill (newpad, AvFILLp (protopad));
137 npad = AvARRAY (newpad);
138 326
139 newpadlist = newAV (); 327 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 328 AvREAL_off (newpadlist);
141 av_store (newpadlist, 0, (SV *) newpad_name); 329#if PERL_VERSION_ATLEAST (5,10,0)
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
331#else
332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
333#endif
334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
335 --AvFILLp (padlist);
336
337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
142 av_store (newpadlist, 1, (SV *) newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
143 339
144 av = newAV (); /* will be @_ */ 340 return newpadlist;
145 av_extend (av, 0); 341}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 342
149 for (ix = fpad; ix > 0; ix--) 343static void
344free_padlist (pTHX_ AV *padlist)
345{
346 /* may be during global destruction */
347 if (SvREFCNT (padlist))
150 { 348 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 349 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 350 while (i >= 0)
153 { 351 {
154 char *name = SvPVX (namesv); /* XXX */ 352 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 353 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 354 {
159 else
160 { /* our own lexical */
161 SV *sv; 355 SV *sv;
162 if (*name == '&') 356 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 357 SvREFCNT_dec (sv);
164 else if (*name == '@') 358
165 sv = (SV *) newAV (); 359 SvREFCNT_dec (*svp);
166 else if (*name == '%')
167 sv = (SV *) newHV ();
168 else
169 sv = NEWSV (0, 0);
170 if (!SvPADBUSY (sv))
171 SvPADMY_on (sv);
172 npad[ix] = sv;
173 } 360 }
174 } 361 }
175 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
176 {
177 npad[ix] = SvREFCNT_inc (ppad[ix]);
178 }
179 else
180 {
181 SV *sv = NEWSV (0, 0);
182 SvPADTMP_on (sv);
183 npad[ix] = sv;
184 }
185 }
186 362
187#if 0 /* return -ENOTUNDERSTOOD */
188 /* Now that vars are all in place, clone nested closures. */
189
190 for (ix = fpad; ix > 0; ix--) {
191 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192 if (namesv
193 && namesv != &PL_sv_undef
194 && !(SvFLAGS(namesv) & SVf_FAKE)
195 && *SvPVX(namesv) == '&'
196 && CvCLONE(ppad[ix]))
197 {
198 CV *kid = cv_clone((CV*)ppad[ix]);
199 SvREFCNT_dec(ppad[ix]);
200 CvCLONE_on(kid);
201 SvPADMY_on(kid);
202 npad[ix] = (SV*)kid;
203 }
204 }
205#endif
206
207 return newpadlist;
208}
209
210#ifdef MAY_FLUSH
211STATIC AV *
212free_padlist (AV *padlist)
213{
214 /* may be during global destruction */
215 if (SvREFCNT(padlist))
216 {
217 I32 i = AvFILLp(padlist);
218 while (i >= 0)
219 {
220 SV **svp = av_fetch(padlist, i--, FALSE);
221 SV *sv = svp ? *svp : Nullsv;
222 if (sv)
223 SvREFCNT_dec(sv);
224 }
225
226 SvREFCNT_dec((SV*)padlist); 363 SvREFCNT_dec ((SV*)padlist);
227 } 364 }
228} 365}
229#endif 366
367static int
368coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
369{
370 AV *padlist;
371 AV *av = (AV *)mg->mg_obj;
372
373 /* casting is fun. */
374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
375 free_padlist (aTHX_ padlist);
376
377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
378
379 return 0;
380}
381
382#define CORO_MAGIC_type_cv 26
383#define CORO_MAGIC_type_state PERL_MAGIC_ext
384
385static MGVTBL coro_cv_vtbl = {
386 0, 0, 0, 0,
387 coro_cv_free
388};
389
390#define CORO_MAGIC_NN(sv, type) \
391 (expect_true (SvMAGIC (sv)->mg_type == type) \
392 ? SvMAGIC (sv) \
393 : mg_find (sv, type))
394
395#define CORO_MAGIC(sv, type) \
396 (expect_true (SvMAGIC (sv)) \
397 ? CORO_MAGIC_NN (sv, type) \
398 : 0)
399
400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
401#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
402
403INLINE struct coro *
404SvSTATE_ (pTHX_ SV *coro)
405{
406 HV *stash;
407 MAGIC *mg;
408
409 if (SvROK (coro))
410 coro = SvRV (coro);
411
412 if (expect_false (SvTYPE (coro) != SVt_PVHV))
413 croak ("Coro::State object required");
414
415 stash = SvSTASH (coro);
416 if (expect_false (stash != coro_stash && stash != coro_state_stash))
417 {
418 /* very slow, but rare, check */
419 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
420 croak ("Coro::State object required");
421 }
422
423 mg = CORO_MAGIC_state (coro);
424 return (struct coro *)mg->mg_ptr;
425}
426
427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* faster than SvSTATE, but expects a coroutine hv */
430#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
431#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
230 432
231/* the next two functions merely cache the padlists */ 433/* the next two functions merely cache the padlists */
232STATIC void 434static void
233get_padlist (CV *cv) 435get_padlist (pTHX_ CV *cv)
234{ 436{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 437 MAGIC *mg = CORO_MAGIC_cv (cv);
438 AV *av;
236 439
237 if (he && AvFILLp ((AV *)*he) >= 0) 440 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 441 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239 else 442 else
240 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241}
242
243STATIC void
244put_padlist (CV *cv)
245{
246 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248 if (SvTYPE (*he) != SVt_PVAV)
249 { 443 {
444#if CORO_PREFER_PERL_FUNCTIONS
445 /* this is probably cleaner? but also slower! */
446 /* in practise, it seems to be less stable */
447 CV *cp = Perl_cv_clone (cv);
448 CvPADLIST (cv) = CvPADLIST (cp);
449 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (*he); 450 SvREFCNT_dec (cp);
251 *he = (SV *)newAV (); 451#else
452 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
453#endif
252 } 454 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 455}
256 456
257#ifdef MAY_FLUSH
258STATIC void
259flush_padlist_cache ()
260{
261 HV *hv = padlist_cache;
262 padlist_cache = newHV ();
263
264 if (hv_iterinit (hv))
265 {
266 HE *he;
267 AV *padlist;
268
269 while (!!(he = hv_iternext (hv)))
270 {
271 AV *av = (AV *)HeVAL(he);
272
273 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (padlist);
276 }
277 }
278
279 SvREFCNT_dec (hv);
280}
281#endif
282
283#define SB do {
284#define SE } while (0)
285
286#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
287#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
290
291static void 457static void
458put_padlist (pTHX_ CV *cv)
459{
460 MAGIC *mg = CORO_MAGIC_cv (cv);
461 AV *av;
462
463 if (expect_false (!mg))
464 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
465
466 av = (AV *)mg->mg_obj;
467
468 if (expect_false (AvFILLp (av) >= AvMAX (av)))
469 av_extend (av, AvMAX (av) + 1);
470
471 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
472}
473
474/** load & save, init *******************************************************/
475
476static void
292load_state(pTHX_ Coro__State c) 477load_perl (pTHX_ Coro__State c)
293{ 478{
294 PL_dowarn = c->dowarn; 479 perl_slots *slot = c->slot;
480 c->slot = 0;
295 481
296 PL_curstackinfo = c->curstackinfo;
297 PL_curstack = c->curstack;
298 PL_mainstack = c->mainstack; 482 PL_mainstack = c->mainstack;
299 PL_stack_sp = c->stack_sp;
300 PL_op = c->op;
301 PL_curpad = c->curpad;
302 PL_stack_base = c->stack_base;
303 PL_stack_max = c->stack_max;
304 PL_tmps_stack = c->tmps_stack;
305 PL_tmps_floor = c->tmps_floor;
306 PL_tmps_ix = c->tmps_ix;
307 PL_tmps_max = c->tmps_max;
308 PL_markstack = c->markstack;
309 PL_markstack_ptr = c->markstack_ptr;
310 PL_markstack_max = c->markstack_max;
311 PL_scopestack = c->scopestack;
312 PL_scopestack_ix = c->scopestack_ix;
313 PL_scopestack_max = c->scopestack_max;
314 PL_savestack = c->savestack;
315 PL_savestack_ix = c->savestack_ix;
316 PL_savestack_max = c->savestack_max;
317 PL_retstack = c->retstack;
318 PL_retstack_ix = c->retstack_ix;
319 PL_retstack_max = c->retstack_max;
320 PL_curcop = c->curcop;
321 PL_start_env = c->start_env;
322 PL_top_env = c->top_env;
323 483
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 484 GvSV (PL_defgv) = slot->defsv;
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 485 GvAV (PL_defgv) = slot->defav;
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 486 GvSV (PL_errgv) = slot->errsv;
487 GvSV (irsgv) = slot->irsgv;
488
489 #define VAR(name,type) PL_ ## name = slot->name;
490 # include "state.h"
491 #undef VAR
327 492
328 { 493 {
329 dSP; 494 dSP;
495
330 CV *cv; 496 CV *cv;
331 497
332 /* now do the ugly restore mess */ 498 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 499 while (expect_true (cv = (CV *)POPs))
334 { 500 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 501 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 502 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 503 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 504 }
348 505
349 PUTBACK; 506 PUTBACK;
350 } 507 }
351}
352 508
509 slf_frame = c->slf_frame;
510 coro_throw = c->throw;
511}
512
353static void 513static void
354save_state(pTHX_ Coro__State c, int flags) 514save_perl (pTHX_ Coro__State c)
355{ 515{
516 c->throw = coro_throw;
517 c->slf_frame = slf_frame;
518
356 { 519 {
357 dSP; 520 dSP;
358 I32 cxix = cxstack_ix; 521 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 522 PERL_CONTEXT *ccstk = cxstack;
360 PERL_SI *top_si = PL_curstackinfo; 523 PERL_SI *top_si = PL_curstackinfo;
… …
362 /* 525 /*
363 * the worst thing you can imagine happens first - we have to save 526 * the worst thing you can imagine happens first - we have to save
364 * (and reinitialize) all cv's in the whole callchain :( 527 * (and reinitialize) all cv's in the whole callchain :(
365 */ 528 */
366 529
367 PUSHs (Nullsv); 530 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 531 /* this loop was inspired by pp_caller */
369 for (;;) 532 for (;;)
370 { 533 {
371 do 534 while (expect_true (cxix >= 0))
372 { 535 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 536 PERL_CONTEXT *cx = &ccstk[cxix--];
374 537
375 if (CxTYPE(cx) == CXt_SUB) 538 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376 { 539 {
377 CV *cv = cx->blk_sub.cv; 540 CV *cv = cx->blk_sub.cv;
541
378 if (CvDEPTH(cv)) 542 if (expect_true (CvDEPTH (cv)))
379 { 543 {
380#ifdef USE_THREADS
381 /*XPUSHs ((SV *)CvOWNER(cv));*/
382 /*CvOWNER(cv) = 0;*/
383 /*error must unlock this cv etc.. etc...*/
384#endif
385 EXTEND (SP, CvDEPTH(cv)*2); 544 EXTEND (SP, 3);
386
387 while (--CvDEPTH(cv))
388 {
389 /* this tells the restore code to increment CvDEPTH */
390 PUSHs (Nullsv);
391 PUSHs ((SV *)cv);
392 }
393
394 PUSHs ((SV *)CvPADLIST(cv)); 545 PUSHs ((SV *)CvPADLIST (cv));
546 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 547 PUSHs ((SV *)cv);
396 548
397 get_padlist (cv); /* this is a monster */ 549 CvDEPTH (cv) = 0;
550 get_padlist (aTHX_ cv);
398 } 551 }
399 } 552 }
400 else if (CxTYPE(cx) == CXt_FORMAT)
401 {
402 /* I never used formats, so how should I know how these are implemented? */
403 /* my bold guess is as a simple, plain sub... */
404 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405 }
406 } 553 }
407 while (cxix >= 0);
408 554
409 if (top_si->si_type == PERLSI_MAIN) 555 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 556 break;
411 557
412 top_si = top_si->si_prev; 558 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 559 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 560 cxix = top_si->si_cxix;
415 } 561 }
416 562
417 PUTBACK; 563 PUTBACK;
418 } 564 }
419 565
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 566 /* allocate some space on the context stack for our purposes */
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 567 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 568 if (SLOT_COUNT >= 1) CXINC;
569 if (SLOT_COUNT >= 2) CXINC;
570 if (SLOT_COUNT >= 3) CXINC;
571 {
572 int i;
573 for (i = 3; i < SLOT_COUNT; ++i)
574 CXINC;
575 }
576 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 577
424 /* I have not the slightest idea of why av_reify is necessary */
425 /* but if it's missing the defav contents magically get replaced sometimes */
426 if (c->defav)
427 av_reify (c->defav);
428
429 c->dowarn = PL_dowarn;
430
431 c->curstackinfo = PL_curstackinfo;
432 c->curstack = PL_curstack;
433 c->mainstack = PL_mainstack; 578 c->mainstack = PL_mainstack;
434 c->stack_sp = PL_stack_sp; 579
435 c->op = PL_op; 580 {
436 c->curpad = PL_curpad; 581 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
437 c->stack_base = PL_stack_base; 582
438 c->stack_max = PL_stack_max; 583 slot->defav = GvAV (PL_defgv);
439 c->tmps_stack = PL_tmps_stack; 584 slot->defsv = DEFSV;
440 c->tmps_floor = PL_tmps_floor; 585 slot->errsv = ERRSV;
441 c->tmps_ix = PL_tmps_ix; 586 slot->irsgv = GvSV (irsgv);
442 c->tmps_max = PL_tmps_max; 587
443 c->markstack = PL_markstack; 588 #define VAR(name,type) slot->name = PL_ ## name;
444 c->markstack_ptr = PL_markstack_ptr; 589 # include "state.h"
445 c->markstack_max = PL_markstack_max; 590 #undef VAR
446 c->scopestack = PL_scopestack; 591 }
447 c->scopestack_ix = PL_scopestack_ix;
448 c->scopestack_max = PL_scopestack_max;
449 c->savestack = PL_savestack;
450 c->savestack_ix = PL_savestack_ix;
451 c->savestack_max = PL_savestack_max;
452 c->retstack = PL_retstack;
453 c->retstack_ix = PL_retstack_ix;
454 c->retstack_max = PL_retstack_max;
455 c->curcop = PL_curcop;
456 c->start_env = PL_start_env;
457 c->top_env = PL_top_env;
458} 592}
459 593
460/* 594/*
461 * allocate various perl stacks. This is an exact copy 595 * allocate various perl stacks. This is almost an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 596 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 597 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 598 * not usually need a lot of stackspace.
465 */ 599 */
466STATIC void 600#if CORO_PREFER_PERL_FUNCTIONS
601# define coro_init_stacks init_stacks
602#else
603static void
467coro_init_stacks (pTHX) 604coro_init_stacks (pTHX)
468{ 605{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 606 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 607 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 608 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 609 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 610
474 PL_stack_base = AvARRAY(PL_curstack); 611 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 612 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 613 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 614
478 New(50,PL_tmps_stack,96,SV*); 615 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 616 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 617 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 618 PL_tmps_max = 32;
482 619
483 New(54,PL_markstack,16,I32); 620 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 621 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 622 PL_markstack_max = PL_markstack + 16;
486 623
624#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 625 SET_MARK_OFFSET;
626#endif
488 627
489 New(54,PL_scopestack,16,I32); 628 New(54,PL_scopestack,8,I32);
490 PL_scopestack_ix = 0; 629 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 630 PL_scopestack_max = 8;
492 631
493 New(54,PL_savestack,96,ANY); 632 New(54,PL_savestack,24,ANY);
494 PL_savestack_ix = 0; 633 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 634 PL_savestack_max = 24;
496 635
636#if !PERL_VERSION_ATLEAST (5,10,0)
497 New(54,PL_retstack,8,OP*); 637 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 638 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 639 PL_retstack_max = 4;
640#endif
500} 641}
642#endif
501 643
502/* 644/*
503 * destroy the stacks, the callchain etc... 645 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 646 */
506STATIC void 647static void
507destroy_stacks(pTHX) 648coro_destruct_stacks (pTHX)
508{ 649{
509 /* is this ugly, I ask? */
510 while (PL_scopestack_ix)
511 LEAVE;
512
513 /* sure it is, but more important: is it correct?? :/ */
514 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515 FREETMPS;
516
517 while (PL_curstackinfo->si_next) 650 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 651 PL_curstackinfo = PL_curstackinfo->si_next;
519 652
520 while (PL_curstackinfo) 653 while (PL_curstackinfo)
521 { 654 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 655 PERL_SI *p = PL_curstackinfo->si_prev;
523 656
524 { 657 if (!IN_DESTRUCT)
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 dounwind(-1);
531
532 SvREFCNT_dec(PL_curstackinfo->si_stack); 658 SvREFCNT_dec (PL_curstackinfo->si_stack);
659
533 Safefree(PL_curstackinfo->si_cxstack); 660 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 661 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 662 PL_curstackinfo = p;
536 } 663 }
537 664
538 Safefree(PL_tmps_stack); 665 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 666 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 667 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 668 Safefree (PL_savestack);
669#if !PERL_VERSION_ATLEAST (5,10,0)
542 Safefree(PL_retstack); 670 Safefree (PL_retstack);
543}
544
545static void
546allocate_stack (Coro__State ctx, int alloc)
547{
548 coro_stack *stack;
549
550 New (0, stack, 1, coro_stack);
551
552 stack->refcnt = 1;
553 stack->usecnt = 1;
554 stack->gencnt = ctx->gencnt = 0;
555 if (alloc)
556 {
557#ifdef HAVE_MMAP
558 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write */
559 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560 if (stack->sptr == (void *)-1)
561#endif 671#endif
672}
673
674static size_t
675coro_rss (pTHX_ struct coro *coro)
676{
677 size_t rss = sizeof (*coro);
678
679 if (coro->mainstack)
680 {
681 perl_slots tmp_slot;
682 perl_slots *slot;
683
684 if (coro->flags & CF_RUNNING)
562 { 685 {
563 /*FIXME*//*D*//* reasonable stack size! */ 686 slot = &tmp_slot;
564 stack->ssize = -4096 * sizeof (long); 687
565 New (0, stack->sptr, 4096, long); 688 #define VAR(name,type) slot->name = PL_ ## name;
689 # include "state.h"
690 #undef VAR
566 } 691 }
567 }
568 else 692 else
569 stack->sptr = 0; 693 slot = coro->slot;
570 694
571 ctx->stack = stack; 695 if (slot)
572}
573
574static void
575deallocate_stack (Coro__State ctx)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
583 if (!--stack->refcnt)
584 { 696 {
585#ifdef HAVE_MMAP 697 rss += sizeof (slot->curstackinfo);
586 if (stack->ssize > 0 && stack->sptr) 698 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
587 munmap (stack->sptr, stack->ssize); 699 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
588 else 700 rss += slot->tmps_max * sizeof (SV *);
589#else 701 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
590 Safefree (stack->sptr); 702 rss += slot->scopestack_max * sizeof (I32);
703 rss += slot->savestack_max * sizeof (ANY);
704
705#if !PERL_VERSION_ATLEAST (5,10,0)
706 rss += slot->retstack_max * sizeof (OP *);
591#endif 707#endif
592 Safefree (stack);
593 } 708 }
594 else if (ctx->gencnt == stack->gencnt) 709 }
595 --stack->usecnt; 710
711 return rss;
712}
713
714/** coroutine stack handling ************************************************/
715
716static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
718static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
719
720/* apparently < 5.8.8 */
721#ifndef MgPV_nolen_const
722#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
723 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
724 (const char*)(mg)->mg_ptr)
725#endif
726
727/*
728 * This overrides the default magic get method of %SIG elements.
729 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
730 * and instead of tryign to save and restore the hash elements, we just provide
731 * readback here.
732 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
733 * not expecting this to actually change the hook. This is a potential problem
734 * when a schedule happens then, but we ignore this.
735 */
736static int
737coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
738{
739 const char *s = MgPV_nolen_const (mg);
740
741 if (*s == '_')
596 } 742 {
597} 743 SV **svp = 0;
598 744
745 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
746 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
747
748 if (svp)
749 {
750 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
751 return 0;
752 }
753 }
754
755 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
756}
757
599static void 758static int
600setup_coro (void *arg) 759coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = 0;
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
780}
781
782static int
783coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
784{
785 const char *s = MgPV_nolen_const (mg);
786
787 if (*s == '_')
788 {
789 SV **svp = 0;
790
791 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
792 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
793
794 if (svp)
795 {
796 SV *old = *svp;
797 *svp = newSVsv (sv);
798 SvREFCNT_dec (old);
799 return 0;
800 }
801 }
802
803 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
804}
805
806static void
807prepare_nop (pTHX_ struct coro_transfer_args *ta)
808{
809 /* kind of mega-hacky, but works */
810 ta->next = ta->prev = (struct coro *)ta;
811}
812
813static int
814slf_check_nop (pTHX_ struct CoroSLF *frame)
815{
816 return 0;
817}
818
819static void NOINLINE /* noinline to keep it out of the transfer fast path */
820coro_setup (pTHX_ struct coro *coro)
601{ 821{
602 /* 822 /*
603 * emulate part of the perl startup here. 823 * emulate part of the perl startup here.
604 */ 824 */
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 825 coro_init_stacks (aTHX);
610 JMPENV_BOOTSTRAP; 826
827 PL_runops = RUNOPS_DEFAULT;
828 PL_curcop = &PL_compiling;
829 PL_in_eval = EVAL_NULL;
830 PL_comppad = 0;
831 PL_curpm = 0;
832 PL_curpad = 0;
833 PL_localizing = 0;
834 PL_dirty = 0;
835 PL_restartop = 0;
836#if PERL_VERSION_ATLEAST (5,10,0)
837 PL_parser = 0;
838#endif
839
840 /* recreate the die/warn hooks */
841 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
842 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
843
844 GvSV (PL_defgv) = newSV (0);
845 GvAV (PL_defgv) = coro->args; coro->args = 0;
846 GvSV (PL_errgv) = newSV (0);
847 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
848 PL_rs = newSVsv (GvSV (irsgv));
849 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
850
851 {
852 dSP;
853 UNOP myop;
854
855 Zero (&myop, 1, UNOP);
856 myop.op_next = Nullop;
857 myop.op_flags = OPf_WANT_VOID;
858
859 PUSHMARK (SP);
860 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
861 PUTBACK;
862 PL_op = (OP *)&myop;
863 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611 SPAGAIN; 864 SPAGAIN;
865 }
612 866
613 /*PL_curcop = 0;*/ 867 /* this newly created coroutine might be run on an existing cctx which most
868 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
869 */
870 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
871 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
872
873 coro_throw = coro->throw;
874}
875
876static void
877coro_destruct (pTHX_ struct coro *coro)
878{
879 if (!IN_DESTRUCT)
880 {
881 /* restore all saved variables and stuff */
882 LEAVE_SCOPE (0);
883 assert (PL_tmps_floor == -1);
884
885 /* free all temporaries */
886 FREETMPS;
887 assert (PL_tmps_ix == -1);
888
889 /* unwind all extra stacks */
890 POPSTACK_TO (PL_mainstack);
891
892 /* unwind main stack */
893 dounwind (-1);
894 }
895
896 SvREFCNT_dec (GvSV (PL_defgv));
614 SvREFCNT_dec (GvAV (PL_defgv)); 897 SvREFCNT_dec (GvAV (PL_defgv));
615 GvAV (PL_defgv) = ctx->args; 898 SvREFCNT_dec (GvSV (PL_errgv));
899 SvREFCNT_dec (PL_defoutgv);
900 SvREFCNT_dec (PL_rs);
901 SvREFCNT_dec (GvSV (irsgv));
616 902
617 if (ctx->stack) 903 SvREFCNT_dec (PL_diehook);
618 { 904 SvREFCNT_dec (PL_warnhook);
619 ctx->cursp = 0; 905
906 SvREFCNT_dec (coro->saved_deffh);
907 SvREFCNT_dec (coro_throw);
620 908
621 PUSHMARK(SP); 909 coro_destruct_stacks (aTHX);
622 PUTBACK; 910}
623 (void) call_sv (sub_init, G_VOID|G_NOARGS); 911
624 croak ("FATAL: CCTXT coroutine returned!"); 912INLINE void
913free_coro_mortal (pTHX)
914{
915 if (expect_true (coro_mortal))
625 } 916 {
626 else 917 SvREFCNT_dec (coro_mortal);
918 coro_mortal = 0;
627 { 919 }
628 UNOP myop; 920}
629 921
630 PL_op = (OP *)&myop; 922static int
923runops_trace (pTHX)
924{
925 COP *oldcop = 0;
926 int oldcxix = -2;
927 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
928 coro_cctx *cctx = coro->cctx;
631 929
632 Zero(&myop, 1, UNOP); 930 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = pp_entersub();
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 } 931 {
651} 932 PERL_ASYNC_CHECK ();
652 933
653static void 934 if (cctx->flags & CC_TRACE_ALL)
654continue_coro (void *arg)
655{
656 /*
657 * this is a _very_ stripped down perl interpreter ;)
658 */
659 Coro__State ctx = (Coro__State)arg;
660
661 ctx->cursp = 0;
662 PL_op = PL_op->op_next;
663 CALLRUNOPS(aTHX);
664 /*NORETURN*/
665 abort ();
666}
667
668STATIC void
669transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
670{
671 dSP;
672 dSTACKLEVEL;
673
674 if (prev != next)
675 {
676 if (next->mainstack)
677 { 935 {
678 SAVE (prev, flags); 936 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
679 LOAD (next);
680
681 /* mark this state as in-use */
682 next->mainstack = 0;
683 next->tmps_ix = -2;
684
685 /* stacklevel changed? if yes, grab the stack for us! */
686 if (flags & TRANSFER_SAVE_CCTXT)
687 { 937 {
688 if (!prev->stack) 938 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
689 allocate_stack (prev, 0); 939 SV **bot, **top;
690 else if (prev->cursp != stacklevel 940 AV *av = newAV (); /* return values */
691 && prev->stack->usecnt > 1) 941 SV **cb;
942 dSP;
943
944 GV *gv = CvGV (cx->blk_sub.cv);
945 SV *fullname = sv_2mortal (newSV (0));
946 if (isGV (gv))
947 gv_efullname3 (fullname, gv, 0);
948
949 bot = PL_stack_base + cx->blk_oldsp + 1;
950 top = cx->blk_gimme == G_ARRAY ? SP + 1
951 : cx->blk_gimme == G_SCALAR ? bot + 1
952 : bot;
953
954 av_extend (av, top - bot);
955 while (bot < top)
956 av_push (av, SvREFCNT_inc_NN (*bot++));
957
958 PL_runops = RUNOPS_DEFAULT;
959 ENTER;
960 SAVETMPS;
961 EXTEND (SP, 3);
962 PUSHMARK (SP);
963 PUSHs (&PL_sv_no);
964 PUSHs (fullname);
965 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
966 PUTBACK;
967 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
968 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
969 SPAGAIN;
970 FREETMPS;
971 LEAVE;
972 PL_runops = runops_trace;
973 }
974
975 if (oldcop != PL_curcop)
976 {
977 oldcop = PL_curcop;
978
979 if (PL_curcop != &PL_compiling)
692 { 980 {
693 prev->gencnt = ++prev->stack->gencnt; 981 SV **cb;
694 prev->stack->usecnt = 1;
695 }
696 982
697 /* has our stack been invalidated? */ 983 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
698 if (next->stack && next->stack->gencnt != next->gencnt)
699 { 984 {
700 deallocate_stack (next); 985 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
701 allocate_stack (next, 1); 986
702 coro_create (&(next->stack->cctx), 987 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
703 continue_coro, (void *)next, 988 {
704 next->stack->sptr, labs (next->stack->ssize)); 989 runops_proc_t old_runops = PL_runops;
990 dSP;
991 GV *gv = CvGV (cx->blk_sub.cv);
992 SV *fullname = sv_2mortal (newSV (0));
993
994 if (isGV (gv))
995 gv_efullname3 (fullname, gv, 0);
996
997 PL_runops = RUNOPS_DEFAULT;
998 ENTER;
999 SAVETMPS;
1000 EXTEND (SP, 3);
1001 PUSHMARK (SP);
1002 PUSHs (&PL_sv_yes);
1003 PUSHs (fullname);
1004 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1005 PUTBACK;
1006 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1007 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1008 SPAGAIN;
1009 FREETMPS;
1010 LEAVE;
1011 PL_runops = runops_trace;
1012 }
1013
1014 oldcxix = cxstack_ix;
705 } 1015 }
706 1016
707 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1017 if (cctx->flags & CC_TRACE_LINE)
708 }
709
710 }
711 else if (next->tmps_ix == -2)
712 croak ("tried to transfer to running coroutine");
713 else
714 {
715 SAVE (prev, -1); /* first get rid of the old state */
716
717 if (flags & TRANSFER_SAVE_CCTXT)
718 {
719 if (!prev->stack)
720 allocate_stack (prev, 0);
721
722 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
723 { 1018 {
724 setup_coro (next); 1019 dSP;
725 1020
726 prev->stack->refcnt++; 1021 PL_runops = RUNOPS_DEFAULT;
727 prev->stack->usecnt++; 1022 ENTER;
728 next->stack = prev->stack; 1023 SAVETMPS;
729 next->gencnt = prev->gencnt; 1024 EXTEND (SP, 3);
1025 PL_runops = RUNOPS_DEFAULT;
1026 PUSHMARK (SP);
1027 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1028 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1029 PUTBACK;
1030 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1031 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1032 SPAGAIN;
1033 FREETMPS;
1034 LEAVE;
1035 PL_runops = runops_trace;
730 } 1036 }
731 else
732 {
733 allocate_stack (next, 1);
734 coro_create (&(next->stack->cctx),
735 setup_coro, (void *)next,
736 next->stack->sptr, labs (next->stack->ssize));
737 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738 } 1037 }
739 } 1038 }
740 else
741 setup_coro (next);
742 } 1039 }
743 } 1040 }
744 1041
745 next->cursp = stacklevel; 1042 TAINT_NOT;
1043 return 0;
746} 1044}
747 1045
1046static void
1047prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1048{
1049 ta->prev = (struct coro *)cctx;
1050 ta->next = 0;
1051}
1052
1053/* inject a fake call to Coro::State::_cctx_init into the execution */
1054/* _cctx_init should be careful, as it could be called at almost any time */
1055/* during execution of a perl program */
1056/* also initialises PL_top_env */
1057static void NOINLINE
1058cctx_prepare (pTHX_ coro_cctx *cctx)
1059{
1060 dSP;
1061 UNOP myop;
1062
1063 PL_top_env = &PL_start_env;
1064
1065 if (cctx->flags & CC_TRACE)
1066 PL_runops = runops_trace;
1067
1068 Zero (&myop, 1, UNOP);
1069 myop.op_next = PL_op;
1070 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1071
1072 PUSHMARK (SP);
1073 EXTEND (SP, 2);
1074 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1075 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1076 PUTBACK;
1077 PL_op = (OP *)&myop;
1078 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1079 SPAGAIN;
1080}
1081
1082/* the tail of transfer: execute stuff we can only do after a transfer */
1083INLINE void
1084transfer_tail (pTHX)
1085{
1086 free_coro_mortal (aTHX);
1087}
1088
1089/*
1090 * this is a _very_ stripped down perl interpreter ;)
1091 */
1092static void
1093cctx_run (void *arg)
1094{
1095#ifdef USE_ITHREADS
1096# if CORO_PTHREAD
1097 PERL_SET_CONTEXT (coro_thx);
1098# endif
1099#endif
1100 {
1101 dTHX;
1102
1103 /* normally we would need to skip the entersub here */
1104 /* not doing so will re-execute it, which is exactly what we want */
1105 /* PL_nop = PL_nop->op_next */
1106
1107 /* inject a fake subroutine call to cctx_init */
1108 cctx_prepare (aTHX_ (coro_cctx *)arg);
1109
1110 /* cctx_run is the alternative tail of transfer() */
1111 transfer_tail (aTHX);
1112
1113 /* somebody or something will hit me for both perl_run and PL_restartop */
1114 PL_restartop = PL_op;
1115 perl_run (PL_curinterp);
1116
1117 /*
1118 * If perl-run returns we assume exit() was being called or the coro
1119 * fell off the end, which seems to be the only valid (non-bug)
1120 * reason for perl_run to return. We try to exit by jumping to the
1121 * bootstrap-time "top" top_env, as we cannot restore the "main"
1122 * coroutine as Coro has no such concept
1123 */
1124 PL_top_env = main_top_env;
1125 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1126 }
1127}
1128
1129static coro_cctx *
1130cctx_new ()
1131{
1132 coro_cctx *cctx;
1133
1134 ++cctx_count;
1135 New (0, cctx, 1, coro_cctx);
1136
1137 cctx->gen = cctx_gen;
1138 cctx->flags = 0;
1139 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1140
1141 return cctx;
1142}
1143
1144/* create a new cctx only suitable as source */
1145static coro_cctx *
1146cctx_new_empty ()
1147{
1148 coro_cctx *cctx = cctx_new ();
1149
1150 cctx->sptr = 0;
1151 coro_create (&cctx->cctx, 0, 0, 0, 0);
1152
1153 return cctx;
1154}
1155
1156/* create a new cctx suitable as destination/running a perl interpreter */
1157static coro_cctx *
1158cctx_new_run ()
1159{
1160 coro_cctx *cctx = cctx_new ();
1161 void *stack_start;
1162 size_t stack_size;
1163
1164#if HAVE_MMAP
1165 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1166 /* mmap supposedly does allocate-on-write for us */
1167 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1168
1169 if (cctx->sptr != (void *)-1)
1170 {
1171 #if CORO_STACKGUARD
1172 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1173 #endif
1174 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1175 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1176 cctx->flags |= CC_MAPPED;
1177 }
1178 else
1179#endif
1180 {
1181 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1182 New (0, cctx->sptr, cctx_stacksize, long);
1183
1184 if (!cctx->sptr)
1185 {
1186 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1187 _exit (EXIT_FAILURE);
1188 }
1189
1190 stack_start = cctx->sptr;
1191 stack_size = cctx->ssize;
1192 }
1193
1194 #if CORO_USE_VALGRIND
1195 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1196 #endif
1197
1198 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1199
1200 return cctx;
1201}
1202
1203static void
1204cctx_destroy (coro_cctx *cctx)
1205{
1206 if (!cctx)
1207 return;
1208
1209 --cctx_count;
1210 coro_destroy (&cctx->cctx);
1211
1212 /* coro_transfer creates new, empty cctx's */
1213 if (cctx->sptr)
1214 {
1215 #if CORO_USE_VALGRIND
1216 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1217 #endif
1218
1219#if HAVE_MMAP
1220 if (cctx->flags & CC_MAPPED)
1221 munmap (cctx->sptr, cctx->ssize);
1222 else
1223#endif
1224 Safefree (cctx->sptr);
1225 }
1226
1227 Safefree (cctx);
1228}
1229
1230/* wether this cctx should be destructed */
1231#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1232
1233static coro_cctx *
1234cctx_get (pTHX)
1235{
1236 while (expect_true (cctx_first))
1237 {
1238 coro_cctx *cctx = cctx_first;
1239 cctx_first = cctx->next;
1240 --cctx_idle;
1241
1242 if (expect_true (!CCTX_EXPIRED (cctx)))
1243 return cctx;
1244
1245 cctx_destroy (cctx);
1246 }
1247
1248 return cctx_new_run ();
1249}
1250
1251static void
1252cctx_put (coro_cctx *cctx)
1253{
1254 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1255
1256 /* free another cctx if overlimit */
1257 if (expect_false (cctx_idle >= cctx_max_idle))
1258 {
1259 coro_cctx *first = cctx_first;
1260 cctx_first = first->next;
1261 --cctx_idle;
1262
1263 cctx_destroy (first);
1264 }
1265
1266 ++cctx_idle;
1267 cctx->next = cctx_first;
1268 cctx_first = cctx;
1269}
1270
1271/** coroutine switching *****************************************************/
1272
1273static void
1274transfer_check (pTHX_ struct coro *prev, struct coro *next)
1275{
1276 /* TODO: throwing up here is considered harmful */
1277
1278 if (expect_true (prev != next))
1279 {
1280 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1281 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1282
1283 if (expect_false (next->flags & CF_RUNNING))
1284 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1285
1286 if (expect_false (next->flags & CF_DESTROYED))
1287 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1288
1289#if !PERL_VERSION_ATLEAST (5,10,0)
1290 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1291 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1292#endif
1293 }
1294}
1295
1296/* always use the TRANSFER macro */
1297static void NOINLINE /* noinline so we have a fixed stackframe */
1298transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1299{
1300 dSTACKLEVEL;
1301
1302 /* sometimes transfer is only called to set idle_sp */
1303 if (expect_false (!next))
1304 {
1305 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1306 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1307 }
1308 else if (expect_true (prev != next))
1309 {
1310 coro_cctx *prev__cctx;
1311
1312 if (expect_false (prev->flags & CF_NEW))
1313 {
1314 /* create a new empty/source context */
1315 prev->cctx = cctx_new_empty ();
1316 prev->flags &= ~CF_NEW;
1317 prev->flags |= CF_RUNNING;
1318 }
1319
1320 prev->flags &= ~CF_RUNNING;
1321 next->flags |= CF_RUNNING;
1322
1323 /* first get rid of the old state */
1324 save_perl (aTHX_ prev);
1325
1326 if (expect_false (next->flags & CF_NEW))
1327 {
1328 /* need to start coroutine */
1329 next->flags &= ~CF_NEW;
1330 /* setup coroutine call */
1331 coro_setup (aTHX_ next);
1332 }
1333 else
1334 load_perl (aTHX_ next);
1335
1336 prev__cctx = prev->cctx;
1337
1338 /* possibly untie and reuse the cctx */
1339 if (expect_true (
1340 prev__cctx->idle_sp == (void *)stacklevel
1341 && !(prev__cctx->flags & CC_TRACE)
1342 && !force_cctx
1343 ))
1344 {
1345 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1346 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1347
1348 prev->cctx = 0;
1349
1350 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1351 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1352 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1353 if (!next->cctx)
1354 next->cctx = cctx_get (aTHX);
1355
1356 cctx_put (prev__cctx);
1357 }
1358
1359 ++next->usecount;
1360
1361 if (expect_true (!next->cctx))
1362 next->cctx = cctx_get (aTHX);
1363
1364 if (expect_false (prev__cctx != next->cctx))
1365 {
1366 prev__cctx->top_env = PL_top_env;
1367 PL_top_env = next->cctx->top_env;
1368 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1369 }
1370
1371 transfer_tail (aTHX);
1372 }
1373}
1374
1375#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1376#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1377
1378/** high level stuff ********************************************************/
1379
1380static int
1381coro_state_destroy (pTHX_ struct coro *coro)
1382{
1383 if (coro->flags & CF_DESTROYED)
1384 return 0;
1385
1386 if (coro->on_destroy)
1387 coro->on_destroy (aTHX_ coro);
1388
1389 coro->flags |= CF_DESTROYED;
1390
1391 if (coro->flags & CF_READY)
1392 {
1393 /* reduce nready, as destroying a ready coro effectively unreadies it */
1394 /* alternative: look through all ready queues and remove the coro */
1395 --coro_nready;
1396 }
1397 else
1398 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1399
1400 if (coro->mainstack && coro->mainstack != main_mainstack)
1401 {
1402 struct coro temp;
1403
1404 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1405
1406 save_perl (aTHX_ &temp);
1407 load_perl (aTHX_ coro);
1408
1409 coro_destruct (aTHX_ coro);
1410
1411 load_perl (aTHX_ &temp);
1412
1413 coro->slot = 0;
1414 }
1415
1416 cctx_destroy (coro->cctx);
1417 SvREFCNT_dec (coro->args);
1418
1419 if (coro->next) coro->next->prev = coro->prev;
1420 if (coro->prev) coro->prev->next = coro->next;
1421 if (coro == coro_first) coro_first = coro->next;
1422
1423 return 1;
1424}
1425
1426static int
1427coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1428{
1429 struct coro *coro = (struct coro *)mg->mg_ptr;
1430 mg->mg_ptr = 0;
1431
1432 coro->hv = 0;
1433
1434 if (--coro->refcnt < 0)
1435 {
1436 coro_state_destroy (aTHX_ coro);
1437 Safefree (coro);
1438 }
1439
1440 return 0;
1441}
1442
1443static int
1444coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1445{
1446 struct coro *coro = (struct coro *)mg->mg_ptr;
1447
1448 ++coro->refcnt;
1449
1450 return 0;
1451}
1452
1453static MGVTBL coro_state_vtbl = {
1454 0, 0, 0, 0,
1455 coro_state_free,
1456 0,
1457#ifdef MGf_DUP
1458 coro_state_dup,
1459#else
1460# define MGf_DUP 0
1461#endif
1462};
1463
1464static void
1465prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1466{
1467 ta->prev = SvSTATE (prev_sv);
1468 ta->next = SvSTATE (next_sv);
1469 TRANSFER_CHECK (*ta);
1470}
1471
1472static void
1473api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1474{
1475 struct coro_transfer_args ta;
1476
1477 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1478 TRANSFER (ta, 1);
1479}
1480
1481/** Coro ********************************************************************/
1482
1483INLINE void
1484coro_enq (pTHX_ struct coro *coro)
1485{
1486 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1487}
1488
1489INLINE SV *
1490coro_deq (pTHX)
1491{
1492 int prio;
1493
1494 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1495 if (AvFILLp (coro_ready [prio]) >= 0)
1496 return av_shift (coro_ready [prio]);
1497
1498 return 0;
1499}
1500
1501static int
1502api_ready (pTHX_ SV *coro_sv)
1503{
1504 struct coro *coro;
1505 SV *sv_hook;
1506 void (*xs_hook)(void);
1507
1508 if (SvROK (coro_sv))
1509 coro_sv = SvRV (coro_sv);
1510
1511 coro = SvSTATE (coro_sv);
1512
1513 if (coro->flags & CF_READY)
1514 return 0;
1515
1516 coro->flags |= CF_READY;
1517
1518 sv_hook = coro_nready ? 0 : coro_readyhook;
1519 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1520
1521 coro_enq (aTHX_ coro);
1522 ++coro_nready;
1523
1524 if (sv_hook)
1525 {
1526 dSP;
1527
1528 ENTER;
1529 SAVETMPS;
1530
1531 PUSHMARK (SP);
1532 PUTBACK;
1533 call_sv (sv_hook, G_DISCARD);
1534 SPAGAIN;
1535
1536 FREETMPS;
1537 LEAVE;
1538 }
1539
1540 if (xs_hook)
1541 xs_hook ();
1542
1543 return 1;
1544}
1545
1546static int
1547api_is_ready (pTHX_ SV *coro_sv)
1548{
1549 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1550}
1551
1552INLINE void
1553prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1554{
1555 SV *prev_sv, *next_sv;
1556
1557 for (;;)
1558 {
1559 next_sv = coro_deq (aTHX);
1560
1561 /* nothing to schedule: call the idle handler */
1562 if (expect_false (!next_sv))
1563 {
1564 dSP;
1565
1566 ENTER;
1567 SAVETMPS;
1568
1569 PUSHMARK (SP);
1570 PUTBACK;
1571 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1572 SPAGAIN;
1573
1574 FREETMPS;
1575 LEAVE;
1576 continue;
1577 }
1578
1579 ta->next = SvSTATE_hv (next_sv);
1580
1581 /* cannot transfer to destroyed coros, skip and look for next */
1582 if (expect_false (ta->next->flags & CF_DESTROYED))
1583 {
1584 SvREFCNT_dec (next_sv);
1585 /* coro_nready has already been taken care of by destroy */
1586 continue;
1587 }
1588
1589 --coro_nready;
1590 break;
1591 }
1592
1593 /* free this only after the transfer */
1594 prev_sv = SvRV (coro_current);
1595 ta->prev = SvSTATE_hv (prev_sv);
1596 TRANSFER_CHECK (*ta);
1597 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1598 ta->next->flags &= ~CF_READY;
1599 SvRV_set (coro_current, next_sv);
1600
1601 free_coro_mortal (aTHX);
1602 coro_mortal = prev_sv;
1603}
1604
1605INLINE void
1606prepare_cede (pTHX_ struct coro_transfer_args *ta)
1607{
1608 api_ready (aTHX_ coro_current);
1609 prepare_schedule (aTHX_ ta);
1610}
1611
1612INLINE void
1613prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1614{
1615 SV *prev = SvRV (coro_current);
1616
1617 if (coro_nready)
1618 {
1619 prepare_schedule (aTHX_ ta);
1620 api_ready (aTHX_ prev);
1621 }
1622 else
1623 prepare_nop (aTHX_ ta);
1624}
1625
1626static void
1627api_schedule (pTHX)
1628{
1629 struct coro_transfer_args ta;
1630
1631 prepare_schedule (aTHX_ &ta);
1632 TRANSFER (ta, 1);
1633}
1634
1635static int
1636api_cede (pTHX)
1637{
1638 struct coro_transfer_args ta;
1639
1640 prepare_cede (aTHX_ &ta);
1641
1642 if (expect_true (ta.prev != ta.next))
1643 {
1644 TRANSFER (ta, 1);
1645 return 1;
1646 }
1647 else
1648 return 0;
1649}
1650
1651static int
1652api_cede_notself (pTHX)
1653{
1654 if (coro_nready)
1655 {
1656 struct coro_transfer_args ta;
1657
1658 prepare_cede_notself (aTHX_ &ta);
1659 TRANSFER (ta, 1);
1660 return 1;
1661 }
1662 else
1663 return 0;
1664}
1665
1666static void
1667api_trace (pTHX_ SV *coro_sv, int flags)
1668{
1669 struct coro *coro = SvSTATE (coro_sv);
1670
1671 if (flags & CC_TRACE)
1672 {
1673 if (!coro->cctx)
1674 coro->cctx = cctx_new_run ();
1675 else if (!(coro->cctx->flags & CC_TRACE))
1676 croak ("cannot enable tracing on coroutine with custom stack,");
1677
1678 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1679 }
1680 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1681 {
1682 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1683
1684 if (coro->flags & CF_RUNNING)
1685 PL_runops = RUNOPS_DEFAULT;
1686 else
1687 coro->slot->runops = RUNOPS_DEFAULT;
1688 }
1689}
1690
1691/*****************************************************************************/
1692/* schedule-like-function opcode (SLF) */
1693
1694static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1695static const CV *slf_cv;
1696static SV **slf_argv;
1697static int slf_argc, slf_arga; /* count, allocated */
1698static I32 slf_ax; /* top of stack, for restore */
1699
1700/* this restores the stack in the case we patched the entersub, to */
1701/* recreate the stack frame as perl will on following calls */
1702/* since entersub cleared the stack */
1703static OP *
1704pp_restore (pTHX)
1705{
1706 int i;
1707 SV **SP = PL_stack_base + slf_ax;
1708
1709 PUSHMARK (SP);
1710
1711 EXTEND (SP, slf_argc + 1);
1712
1713 for (i = 0; i < slf_argc; ++i)
1714 PUSHs (sv_2mortal (slf_argv [i]));
1715
1716 PUSHs ((SV *)CvGV (slf_cv));
1717
1718 RETURNOP (slf_restore.op_first);
1719}
1720
1721static void
1722slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1723{
1724 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1725}
1726
1727static void
1728slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1729{
1730 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1731
1732 frame->prepare = slf_prepare_set_stacklevel;
1733 frame->check = slf_check_nop;
1734 frame->data = (void *)SvIV (arg [0]);
1735}
1736
1737static void
1738slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1739{
1740 SV **arg = (SV **)slf_frame.data;
1741
1742 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1743}
1744
1745static void
1746slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1747{
1748 if (items != 2)
1749 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1750
1751 frame->prepare = slf_prepare_transfer;
1752 frame->check = slf_check_nop;
1753 frame->data = (void *)arg; /* let's hope it will stay valid */
1754}
1755
1756static void
1757slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1758{
1759 frame->prepare = prepare_schedule;
1760 frame->check = slf_check_nop;
1761}
1762
1763static void
1764slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1765{
1766 frame->prepare = prepare_cede;
1767 frame->check = slf_check_nop;
1768}
1769
1770static void
1771slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1772{
1773 frame->prepare = prepare_cede_notself;
1774 frame->check = slf_check_nop;
1775}
1776
1777/* we hijack an hopefully unused CV flag for our purposes */
1778#define CVf_SLF 0x4000
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* return value handling - mostly like entersub */
1845 {
1846 dSP;
1847 SV **bot = PL_stack_base + checkmark;
1848 int gimme = GIMME_V;
1849
1850 /* make sure we put something on the stack in scalar context */
1851 if (gimme == G_SCALAR)
1852 {
1853 if (sp == bot)
1854 XPUSHs (&PL_sv_undef);
1855
1856 SP = bot + 1;
1857 }
1858
1859 PUTBACK;
1860 }
1861
1862 /* exception handling */
1863 if (expect_false (coro_throw))
1864 {
1865 SV *exception = sv_2mortal (coro_throw);
1866
1867 coro_throw = 0;
1868 sv_setsv (ERRSV, exception);
1869 croak (0);
1870 }
1871
1872 return NORMAL;
1873}
1874
1875static void
1876api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1877{
1878 int i;
1879 SV **arg = PL_stack_base + ax;
1880 int items = PL_stack_sp - arg + 1;
1881
1882 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1883
1884 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1885 && PL_op->op_ppaddr != pp_slf)
1886 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1887
1888 CvFLAGS (cv) |= CVf_SLF;
1889 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1890 slf_cv = cv;
1891
1892 /* we patch the op, and then re-run the whole call */
1893 /* we have to put the same argument on the stack for this to work */
1894 /* and this will be done by pp_restore */
1895 slf_restore.op_next = (OP *)&slf_restore;
1896 slf_restore.op_type = OP_CUSTOM;
1897 slf_restore.op_ppaddr = pp_restore;
1898 slf_restore.op_first = PL_op;
1899
1900 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1901
1902 if (PL_op->op_flags & OPf_STACKED)
1903 {
1904 if (items > slf_arga)
1905 {
1906 slf_arga = items;
1907 free (slf_argv);
1908 slf_argv = malloc (slf_arga * sizeof (SV *));
1909 }
1910
1911 slf_argc = items;
1912
1913 for (i = 0; i < items; ++i)
1914 slf_argv [i] = SvREFCNT_inc (arg [i]);
1915 }
1916 else
1917 slf_argc = 0;
1918
1919 PL_op->op_ppaddr = pp_slf;
1920 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1921
1922 PL_op = (OP *)&slf_restore;
1923}
1924
1925/*****************************************************************************/
1926/* PerlIO::cede */
1927
1928typedef struct
1929{
1930 PerlIOBuf base;
1931 NV next, every;
1932} PerlIOCede;
1933
1934static IV
1935PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1936{
1937 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1938
1939 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1940 self->next = nvtime () + self->every;
1941
1942 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1943}
1944
1945static SV *
1946PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1947{
1948 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1949
1950 return newSVnv (self->every);
1951}
1952
1953static IV
1954PerlIOCede_flush (pTHX_ PerlIO *f)
1955{
1956 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1957 double now = nvtime ();
1958
1959 if (now >= self->next)
1960 {
1961 api_cede (aTHX);
1962 self->next = now + self->every;
1963 }
1964
1965 return PerlIOBuf_flush (aTHX_ f);
1966}
1967
1968static PerlIO_funcs PerlIO_cede =
1969{
1970 sizeof(PerlIO_funcs),
1971 "cede",
1972 sizeof(PerlIOCede),
1973 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1974 PerlIOCede_pushed,
1975 PerlIOBuf_popped,
1976 PerlIOBuf_open,
1977 PerlIOBase_binmode,
1978 PerlIOCede_getarg,
1979 PerlIOBase_fileno,
1980 PerlIOBuf_dup,
1981 PerlIOBuf_read,
1982 PerlIOBuf_unread,
1983 PerlIOBuf_write,
1984 PerlIOBuf_seek,
1985 PerlIOBuf_tell,
1986 PerlIOBuf_close,
1987 PerlIOCede_flush,
1988 PerlIOBuf_fill,
1989 PerlIOBase_eof,
1990 PerlIOBase_error,
1991 PerlIOBase_clearerr,
1992 PerlIOBase_setlinebuf,
1993 PerlIOBuf_get_base,
1994 PerlIOBuf_bufsiz,
1995 PerlIOBuf_get_ptr,
1996 PerlIOBuf_get_cnt,
1997 PerlIOBuf_set_ptrcnt,
1998};
1999
2000/*****************************************************************************/
2001/* Coro::Semaphore */
2002
2003static void
2004coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2005{
2006 SV *count_sv = AvARRAY (av)[0];
2007 IV count = SvIVX (count_sv);
2008
2009 count += adjust;
2010 SvIVX (count_sv) = count;
2011
2012 /* now wake up as many waiters as are expected to lock */
2013 while (count > 0 && AvFILLp (av) > 0)
2014 {
2015 SV *cb;
2016
2017 /* swap first two elements so we can shift a waiter */
2018 AvARRAY (av)[0] = AvARRAY (av)[1];
2019 AvARRAY (av)[1] = count_sv;
2020 cb = av_shift (av);
2021
2022 if (SvOBJECT (cb))
2023 api_ready (aTHX_ cb);
2024 else
2025 croak ("callbacks not yet supported");
2026
2027 SvREFCNT_dec (cb);
2028
2029 --count;
2030 }
2031}
2032
2033static void
2034coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2035{
2036 /* call $sem->adjust (0) to possibly wake up some other waiters */
2037 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2038}
2039
2040static int
2041slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2042{
2043 AV *av = (AV *)frame->data;
2044 SV *count_sv = AvARRAY (av)[0];
2045
2046 if (SvIVX (count_sv) > 0)
2047 {
2048 SvSTATE_current->on_destroy = 0;
2049 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2050 return 0;
2051 }
2052 else
2053 {
2054 int i;
2055 /* if we were woken up but can't down, we look through the whole */
2056 /* waiters list and only add us if we aren't in there already */
2057 /* this avoids some degenerate memory usage cases */
2058
2059 for (i = 1; i <= AvFILLp (av); ++i)
2060 if (AvARRAY (av)[i] == SvRV (coro_current))
2061 return 1;
2062
2063 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2064 return 1;
2065 }
2066}
2067
2068static void
2069slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2070{
2071 AV *av = (AV *)SvRV (arg [0]);
2072
2073 if (SvIVX (AvARRAY (av)[0]) > 0)
2074 {
2075 frame->data = (void *)av;
2076 frame->prepare = prepare_nop;
2077 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2078 }
2079 else
2080 {
2081 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2082
2083 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2084 frame->prepare = prepare_schedule;
2085
2086 /* to avoid race conditions when a woken-up coro gets terminated */
2087 /* we arrange for a temporary on_destroy that calls adjust (0) */
2088 assert (!SvSTATE_current->on_destroy);//D
2089 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2090 }
2091
2092 frame->check = slf_check_semaphore_down;
2093
2094}
2095
2096/*****************************************************************************/
2097/* gensub: simple closure generation utility */
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)newSV (0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120/* Coro::AIO */
2121
2122#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2123
2124/* helper storage struct */
2125struct io_state
2126{
2127 int errorno;
2128 I32 laststype; /* U16 in 5.10.0 */
2129 int laststatval;
2130 Stat_t statcache;
2131};
2132
2133static void
2134coro_aio_callback (pTHX_ CV *cv)
2135{
2136 dXSARGS;
2137 AV *state = (AV *)GENSUB_ARG;
2138 SV *coro = av_pop (state);
2139 SV *data_sv = newSV (sizeof (struct io_state));
2140
2141 av_extend (state, items);
2142
2143 sv_upgrade (data_sv, SVt_PV);
2144 SvCUR_set (data_sv, sizeof (struct io_state));
2145 SvPOK_only (data_sv);
2146
2147 {
2148 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2149
2150 data->errorno = errno;
2151 data->laststype = PL_laststype;
2152 data->laststatval = PL_laststatval;
2153 data->statcache = PL_statcache;
2154 }
2155
2156 /* now build the result vector out of all the parameters and the data_sv */
2157 {
2158 int i;
2159
2160 for (i = 0; i < items; ++i)
2161 av_push (state, SvREFCNT_inc_NN (ST (i)));
2162 }
2163
2164 av_push (state, data_sv);
2165
2166 api_ready (aTHX_ coro);
2167 SvREFCNT_dec (coro);
2168 SvREFCNT_dec ((AV *)state);
2169}
2170
2171static int
2172slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2173{
2174 AV *state = (AV *)frame->data;
2175
2176 /* one element that is an RV? repeat! */
2177 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2178 return 1;
2179
2180 /* restore status */
2181 {
2182 SV *data_sv = av_pop (state);
2183 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2184
2185 errno = data->errorno;
2186 PL_laststype = data->laststype;
2187 PL_laststatval = data->laststatval;
2188 PL_statcache = data->statcache;
2189
2190 SvREFCNT_dec (data_sv);
2191 }
2192
2193 /* push result values */
2194 {
2195 dSP;
2196 int i;
2197
2198 EXTEND (SP, AvFILLp (state) + 1);
2199 for (i = 0; i <= AvFILLp (state); ++i)
2200 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2212 SV *coro_hv = SvRV (coro_current);
2213 struct coro *coro = SvSTATE_hv (coro_hv);
2214
2215 /* put our coroutine id on the state arg */
2216 av_push (state, SvREFCNT_inc_NN (coro_hv));
2217
2218 /* first see whether we have a non-zero priority and set it as AIO prio */
2219 if (coro->prio)
2220 {
2221 dSP;
2222
2223 static SV *prio_cv;
2224 static SV *prio_sv;
2225
2226 if (expect_false (!prio_cv))
2227 {
2228 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2229 prio_sv = newSViv (0);
2230 }
2231
2232 PUSHMARK (SP);
2233 sv_setiv (prio_sv, coro->prio);
2234 XPUSHs (prio_sv);
2235
2236 PUTBACK;
2237 call_sv (prio_cv, G_VOID | G_DISCARD);
2238 }
2239
2240 /* now call the original request */
2241 {
2242 dSP;
2243 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2244 int i;
2245
2246 PUSHMARK (SP);
2247
2248 /* first push all args to the stack */
2249 EXTEND (SP, items + 1);
2250
2251 for (i = 0; i < items; ++i)
2252 PUSHs (arg [i]);
2253
2254 /* now push the callback closure */
2255 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2256
2257 /* now call the AIO function - we assume our request is uncancelable */
2258 PUTBACK;
2259 call_sv ((SV *)req, G_VOID | G_DISCARD);
2260 }
2261
2262 /* now that the requets is going, we loop toll we have a result */
2263 frame->data = (void *)state;
2264 frame->prepare = prepare_schedule;
2265 frame->check = slf_check_aio_req;
2266}
2267
2268static void
2269coro_aio_req_xs (pTHX_ CV *cv)
2270{
2271 dXSARGS;
2272
2273 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2274
2275 XSRETURN_EMPTY;
2276}
2277
2278/*****************************************************************************/
2279
748MODULE = Coro::State PACKAGE = Coro::State 2280MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749 2281
750PROTOTYPES: ENABLE 2282PROTOTYPES: DISABLE
751 2283
752BOOT: 2284BOOT:
753{ /* {} necessary for stoopid perl-5.6.x */ 2285{
754 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2286#ifdef USE_ITHREADS
755 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2287# if CORO_PTHREAD
2288 coro_thx = PERL_GET_CONTEXT;
2289# endif
2290#endif
2291 BOOT_PAGESIZE;
2292
2293 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2294 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2295
2296 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2297 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2298 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2299
2300 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2301 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2302 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2303
756 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2304 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757 2305
758 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2306 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2307 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2308 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2309 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763 if (!padlist_cache)
764 padlist_cache = newHV ();
765 2310
766 main_mainstack = PL_mainstack; 2311 main_mainstack = PL_mainstack;
767} 2312 main_top_env = PL_top_env;
768 2313
769Coro::State 2314 while (main_top_env->je_prev)
770_newprocess(args) 2315 main_top_env = main_top_env->je_prev;
771 SV * args 2316
772 PROTOTYPE: $ 2317 {
2318 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2319
2320 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2321 hv_store_ent (PL_custom_op_names, slf,
2322 newSVpv ("coro_slf", 0), 0);
2323
2324 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2325 hv_store_ent (PL_custom_op_descs, slf,
2326 newSVpv ("coro schedule like function", 0), 0);
2327 }
2328
2329 coroapi.ver = CORO_API_VERSION;
2330 coroapi.rev = CORO_API_REVISION;
2331
2332 coroapi.transfer = api_transfer;
2333
2334 coroapi.sv_state = SvSTATE_;
2335 coroapi.execute_slf = api_execute_slf;
2336 coroapi.prepare_nop = prepare_nop;
2337 coroapi.prepare_schedule = prepare_schedule;
2338 coroapi.prepare_cede = prepare_cede;
2339 coroapi.prepare_cede_notself = prepare_cede_notself;
2340
2341 {
2342 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2343
2344 if (!svp) croak ("Time::HiRes is required");
2345 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2346
2347 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2348 }
2349
2350 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2351}
2352
2353SV *
2354new (char *klass, ...)
773 CODE: 2355 CODE:
774 Coro__State coro; 2356{
2357 struct coro *coro;
2358 MAGIC *mg;
2359 HV *hv;
2360 int i;
775 2361
776 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
777 croak ("Coro::State::_newprocess expects an arrayref");
778
779 New (0, coro, 1, struct coro); 2362 Newz (0, coro, 1, struct coro);
2363 coro->args = newAV ();
2364 coro->flags = CF_NEW;
780 2365
781 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2366 if (coro_first) coro_first->prev = coro;
782 coro->mainstack = 0; /* actual work is done inside transfer */ 2367 coro->next = coro_first;
783 coro->stack = 0; 2368 coro_first = coro;
784 2369
785 RETVAL = coro; 2370 coro->hv = hv = newHV ();
2371 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2372 mg->mg_flags |= MGf_DUP;
2373 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2374
2375 av_extend (coro->args, items - 1);
2376 for (i = 1; i < items; i++)
2377 av_push (coro->args, newSVsv (ST (i)));
2378}
786 OUTPUT: 2379 OUTPUT:
787 RETVAL 2380 RETVAL
788 2381
789void 2382void
790transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2383_set_stacklevel (...)
791 Coro::State_or_hashref prev 2384 CODE:
792 Coro::State_or_hashref next 2385 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
793 int flags
794 PROTOTYPE: @
795 CODE:
796 transfer (aTHX_ prev, next, flags);
797 2386
798void 2387void
799DESTROY(coro) 2388transfer (...)
800 Coro::State coro 2389 PROTOTYPE: $$
801 CODE: 2390 CODE:
2391 CORO_EXECUTE_SLF_XS (slf_init_transfer);
802 2392
803 if (coro->mainstack && coro->mainstack != main_mainstack) 2393bool
2394_destroy (SV *coro_sv)
2395 CODE:
2396 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2397 OUTPUT:
2398 RETVAL
2399
2400void
2401_exit (int code)
2402 PROTOTYPE: $
2403 CODE:
2404 _exit (code);
2405
2406int
2407cctx_stacksize (int new_stacksize = 0)
2408 PROTOTYPE: ;$
2409 CODE:
2410 RETVAL = cctx_stacksize;
2411 if (new_stacksize)
2412 {
2413 cctx_stacksize = new_stacksize;
2414 ++cctx_gen;
2415 }
2416 OUTPUT:
2417 RETVAL
2418
2419int
2420cctx_max_idle (int max_idle = 0)
2421 PROTOTYPE: ;$
2422 CODE:
2423 RETVAL = cctx_max_idle;
2424 if (max_idle > 1)
2425 cctx_max_idle = max_idle;
2426 OUTPUT:
2427 RETVAL
2428
2429int
2430cctx_count ()
2431 PROTOTYPE:
2432 CODE:
2433 RETVAL = cctx_count;
2434 OUTPUT:
2435 RETVAL
2436
2437int
2438cctx_idle ()
2439 PROTOTYPE:
2440 CODE:
2441 RETVAL = cctx_idle;
2442 OUTPUT:
2443 RETVAL
2444
2445void
2446list ()
2447 PROTOTYPE:
2448 PPCODE:
2449{
2450 struct coro *coro;
2451 for (coro = coro_first; coro; coro = coro->next)
2452 if (coro->hv)
2453 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2454}
2455
2456void
2457call (Coro::State coro, SV *coderef)
2458 ALIAS:
2459 eval = 1
2460 CODE:
2461{
2462 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
804 { 2463 {
805 struct coro temp; 2464 struct coro temp;
806 2465
807 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2466 if (!(coro->flags & CF_RUNNING))
808 LOAD(aTHX_ coro); 2467 {
2468 PUTBACK;
2469 save_perl (aTHX_ &temp);
2470 load_perl (aTHX_ coro);
2471 }
809 2472
810 destroy_stacks (aTHX); 2473 {
2474 dSP;
2475 ENTER;
2476 SAVETMPS;
2477 PUTBACK;
2478 PUSHSTACK;
2479 PUSHMARK (SP);
811 2480
812 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2481 if (ix)
2482 eval_sv (coderef, 0);
2483 else
2484 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813 2485
814 coro->mainstack = 0; 2486 POPSTACK;
2487 SPAGAIN;
2488 FREETMPS;
2489 LEAVE;
2490 PUTBACK;
2491 }
2492
2493 if (!(coro->flags & CF_RUNNING))
2494 {
2495 save_perl (aTHX_ coro);
2496 load_perl (aTHX_ &temp);
2497 SPAGAIN;
2498 }
815 } 2499 }
2500}
816 2501
817 deallocate_stack (coro); 2502SV *
818 2503is_ready (Coro::State coro)
819 Safefree (coro); 2504 PROTOTYPE: $
2505 ALIAS:
2506 is_ready = CF_READY
2507 is_running = CF_RUNNING
2508 is_new = CF_NEW
2509 is_destroyed = CF_DESTROYED
2510 CODE:
2511 RETVAL = boolSV (coro->flags & ix);
2512 OUTPUT:
2513 RETVAL
820 2514
821void 2515void
822flush() 2516throw (Coro::State self, SV *throw = &PL_sv_undef)
2517 PROTOTYPE: $;$
2518 CODE:
2519{
2520 struct coro *current = SvSTATE_current;
2521 SV **throwp = self == current ? &coro_throw : &self->throw;
2522 SvREFCNT_dec (*throwp);
2523 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2524}
2525
2526void
2527api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2528 PROTOTYPE: $;$
2529 C_ARGS: aTHX_ coro, flags
2530
2531SV *
2532has_cctx (Coro::State coro)
2533 PROTOTYPE: $
823 CODE: 2534 CODE:
824#ifdef MAY_FLUSH 2535 RETVAL = boolSV (!!coro->cctx);
825 flush_padlist_cache (); 2536 OUTPUT:
826#endif 2537 RETVAL
827 2538
828MODULE = Coro::State PACKAGE = Coro::Cont 2539int
2540is_traced (Coro::State coro)
2541 PROTOTYPE: $
2542 CODE:
2543 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2544 OUTPUT:
2545 RETVAL
829 2546
830# this is slightly dirty 2547UV
2548rss (Coro::State coro)
2549 PROTOTYPE: $
2550 ALIAS:
2551 usecount = 1
2552 CODE:
2553 switch (ix)
2554 {
2555 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2556 case 1: RETVAL = coro->usecount; break;
2557 }
2558 OUTPUT:
2559 RETVAL
831 2560
832void 2561void
833yield(...) 2562force_cctx ()
2563 PROTOTYPE:
2564 CODE:
2565 SvSTATE_current->cctx->idle_sp = 0;
2566
2567void
2568swap_defsv (Coro::State self)
834 PROTOTYPE: @ 2569 PROTOTYPE: $
2570 ALIAS:
2571 swap_defav = 1
835 CODE: 2572 CODE:
836 static SV *returnstk; 2573 if (!self->slot)
837 SV *sv; 2574 croak ("cannot swap state with coroutine that has no saved state,");
2575 else
2576 {
2577 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2578 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2579
2580 SV *tmp = *src; *src = *dst; *dst = tmp;
2581 }
2582
2583
2584MODULE = Coro::State PACKAGE = Coro
2585
2586BOOT:
2587{
2588 int i;
2589
2590 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2591 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2592 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2593
2594 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2595 SvREADONLY_on (coro_current);
2596
2597 coro_stash = gv_stashpv ("Coro", TRUE);
2598
2599 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2600 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2601 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2602 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2603 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2604 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2605
2606 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2607 coro_ready[i] = newAV ();
2608
2609 {
2610 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2611
2612 coroapi.schedule = api_schedule;
2613 coroapi.cede = api_cede;
2614 coroapi.cede_notself = api_cede_notself;
2615 coroapi.ready = api_ready;
2616 coroapi.is_ready = api_is_ready;
2617 coroapi.nready = coro_nready;
2618 coroapi.current = coro_current;
2619
2620 GCoroAPI = &coroapi;
2621 sv_setiv (sv, (IV)&coroapi);
2622 SvREADONLY_on (sv);
2623 }
2624}
2625
2626void
2627schedule (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2630
2631void
2632cede (...)
2633 CODE:
2634 CORO_EXECUTE_SLF_XS (slf_init_cede);
2635
2636void
2637cede_notself (...)
2638 CODE:
2639 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2640
2641void
2642_set_current (SV *current)
2643 PROTOTYPE: $
2644 CODE:
2645 SvREFCNT_dec (SvRV (coro_current));
2646 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2647
2648void
2649_set_readyhook (SV *hook)
2650 PROTOTYPE: $
2651 CODE:
2652 SvREFCNT_dec (coro_readyhook);
2653 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2654
2655int
2656prio (Coro::State coro, int newprio = 0)
2657 PROTOTYPE: $;$
2658 ALIAS:
2659 nice = 1
2660 CODE:
2661{
2662 RETVAL = coro->prio;
2663
2664 if (items > 1)
2665 {
2666 if (ix)
2667 newprio = coro->prio - newprio;
2668
2669 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2670 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2671
2672 coro->prio = newprio;
2673 }
2674}
2675 OUTPUT:
2676 RETVAL
2677
2678SV *
2679ready (SV *self)
2680 PROTOTYPE: $
2681 CODE:
2682 RETVAL = boolSV (api_ready (aTHX_ self));
2683 OUTPUT:
2684 RETVAL
2685
2686int
2687nready (...)
2688 PROTOTYPE:
2689 CODE:
2690 RETVAL = coro_nready;
2691 OUTPUT:
2692 RETVAL
2693
2694# for async_pool speedup
2695void
2696_pool_1 (SV *cb)
2697 CODE:
2698{
2699 HV *hv = (HV *)SvRV (coro_current);
2700 struct coro *coro = SvSTATE_hv ((SV *)hv);
838 AV *defav = GvAV (PL_defgv); 2701 AV *defav = GvAV (PL_defgv);
839 struct coro *prev, *next; 2702 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2703 AV *invoke_av;
2704 int i, len;
840 2705
841 if (!returnstk) 2706 if (!invoke)
842 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2707 {
2708 SV *old = PL_diehook;
2709 PL_diehook = 0;
2710 SvREFCNT_dec (old);
2711 croak ("\3async_pool terminate\2\n");
2712 }
843 2713
844 /* set up @_ -- ugly */ 2714 SvREFCNT_dec (coro->saved_deffh);
845 av_clear (defav); 2715 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2716
2717 hv_store (hv, "desc", sizeof ("desc") - 1,
2718 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2719
2720 invoke_av = (AV *)SvRV (invoke);
2721 len = av_len (invoke_av);
2722
2723 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2724
2725 if (len > 0)
2726 {
846 av_fill (defav, items - 1); 2727 av_fill (defav, len - 1);
847 while (items--) 2728 for (i = 0; i < len; ++i)
848 av_store (defav, items, SvREFCNT_inc (ST(items))); 2729 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2730 }
2731}
849 2732
850 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2733void
851 sv = av_pop ((AV *)SvRV (returnstk)); 2734_pool_2 (SV *cb)
852 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 2735 CODE:
853 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 2736{
2737 HV *hv = (HV *)SvRV (coro_current);
2738 struct coro *coro = SvSTATE_hv ((SV *)hv);
2739
2740 sv_setsv (cb, &PL_sv_undef);
2741
2742 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2743 coro->saved_deffh = 0;
2744
2745 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2746 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2747 {
2748 SV *old = PL_diehook;
2749 PL_diehook = 0;
854 SvREFCNT_dec (sv); 2750 SvREFCNT_dec (old);
2751 croak ("\3async_pool terminate\2\n");
2752 }
855 2753
856 transfer(aTHX_ prev, next, 0); 2754 av_clear (GvAV (PL_defgv));
2755 hv_store (hv, "desc", sizeof ("desc") - 1,
2756 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
857 2757
2758 coro->prio = 0;
2759
2760 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2761 api_trace (aTHX_ coro_current, 0);
2762
2763 av_push (av_async_pool, newSVsv (coro_current));
2764}
2765
2766
2767MODULE = Coro::State PACKAGE = PerlIO::cede
2768
2769BOOT:
2770 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2771
2772
2773MODULE = Coro::State PACKAGE = Coro::Semaphore
2774
2775SV *
2776new (SV *klass, SV *count_ = 0)
2777 CODE:
2778{
2779 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2780 AV *av = newAV ();
2781 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2782 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2783}
2784 OUTPUT:
2785 RETVAL
2786
2787SV *
2788count (SV *self)
2789 CODE:
2790 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2791 OUTPUT:
2792 RETVAL
2793
2794void
2795up (SV *self, int adjust = 1)
2796 ALIAS:
2797 adjust = 1
2798 CODE:
2799 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2800
2801void
2802down (SV *self)
2803 CODE:
2804 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2805
2806void
2807try (SV *self)
2808 PPCODE:
2809{
2810 AV *av = (AV *)SvRV (self);
2811 SV *count_sv = AvARRAY (av)[0];
2812 IV count = SvIVX (count_sv);
2813
2814 if (count > 0)
2815 {
2816 --count;
2817 SvIVX (count_sv) = count;
2818 XSRETURN_YES;
2819 }
2820 else
2821 XSRETURN_NO;
2822}
2823
2824void
2825waiters (SV *self)
2826 CODE:
2827{
2828 AV *av = (AV *)SvRV (self);
2829
2830 if (GIMME_V == G_SCALAR)
2831 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2832 else
2833 {
2834 int i;
2835 EXTEND (SP, AvFILLp (av) + 1 - 1);
2836 for (i = 1; i <= AvFILLp (av); ++i)
2837 PUSHs (newSVsv (AvARRAY (av)[i]));
2838 }
2839}
2840
2841
2842MODULE = Coro::State PACKAGE = Coro::AnyEvent
2843
2844BOOT:
2845 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2846
2847void
2848_schedule (...)
2849 CODE:
2850{
2851 static int incede;
2852
2853 api_cede_notself (aTHX);
2854
2855 ++incede;
2856 while (coro_nready >= incede && api_cede (aTHX))
2857 ;
2858
2859 sv_setsv (sv_activity, &PL_sv_undef);
2860 if (coro_nready >= incede)
2861 {
2862 PUSHMARK (SP);
2863 PUTBACK;
2864 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2865 SPAGAIN;
2866 }
2867
2868 --incede;
2869}
2870
2871
2872MODULE = Coro::State PACKAGE = Coro::AIO
2873
2874void
2875_register (char *target, char *proto, SV *req)
2876 CODE:
2877{
2878 HV *st;
2879 GV *gvp;
2880 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2881 /* newXSproto doesn't return the CV on 5.8 */
2882 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2883 sv_setpv ((SV *)slf_cv, proto);
2884 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2885}
2886

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