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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.299 by root, Wed Nov 19 00:06:55 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>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
10#endif 35# endif
11 36# include <limits.h>
12#define MAY_FLUSH /* increases codesize */ 37# ifndef PAGESIZE
13 38# define PAGESIZE pagesize
14/* perl-related */ 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
15#define TRANSFER_SAVE_DEFAV 0x00000001 40static long pagesize;
16#define TRANSFER_SAVE_DEFSV 0x00000002 41# else
17#define TRANSFER_SAVE_ERRSV 0x00000004 42# define BOOT_PAGESIZE (void)0
18/* c-related */ 43# endif
19#define TRANSFER_SAVE_CCTXT 0x00000008
20#ifdef CORO_LAZY_STACK
21# define TRANSFER_LAZY_STACK 0x00000010
22#else 44#else
23# 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
24#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
25 82
26#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 83/* 5.11 */
27 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
28 87
29#define SUB_INIT "Coro::State::initialize" 88/* 5.10.0 */
30#define UCORO_STATE "_coro_state" 89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
31 92
32/* The next macro should delcare a variable stacklevel that contains and approximation 93/* 5.8.8 */
33 * to the current C stack pointer. It's property is that it changes with each call 94#ifndef GV_NOTQUAL
34 * 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 int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
35#define dSTACKLEVEL void *stacklevel = &stacklevel 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
36 131
37#define labs(l) ((l) >= 0 ? (l) : -(l)) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
38 133
39/* this is actually not only the c stack but also c registers etc... */ 134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
148
149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
155# endif
156#endif
157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
40typedef struct { 199typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 200{
42 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
45 coro_context cctx; 211 coro_context cctx;
46 212
47 void *sptr; 213 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
49} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
50 219
51static coro_stack main_stack = { 1, 0, 0 }; 220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
52 226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
53struct coro { 242struct coro {
54 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
55 coro_stack *stack; 244 coro_cctx *cctx;
56 void *cursp;
57 int gencnt;
58 245
59 /* optionally saved, might be zero */ 246 /* state data */
60 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
61 SV *defsv;
62 SV *errsv;
63
64 /* saved global state not related to stacks */
65 U8 dowarn;
66
67 /* the stacks and related info (callchain etc..) */
68 PERL_SI *curstackinfo;
69 AV *curstack;
70 AV *mainstack; 248 AV *mainstack;
71 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV start_env;
94 JMPENV *top_env;
95 250
96 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
97 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *except; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
98}; 269};
99 270
100typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
101typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
102 273
103static AV *main_mainstack; /* used to differentiate between $main and others */ 274/* the following variables are effectively part of the perl context */
104static HV *coro_state_stash; 275/* and get copied between struct coro and these variables */
105static SV *ucoro_state_sv; 276/* the mainr easonw e don't support windows process emulation */
106static U32 ucoro_state_hash; 277static struct CoroSLF slf_frame; /* the current slf frame */
107static HV *padlist_cache;
108 278
109/* mostly copied from op.c:cv_clone2 */ 279/** Coro ********************************************************************/
110STATIC AV * 280
111clone_padlist (AV *protopadlist) 281#define PRIO_MAX 3
282#define PRIO_HIGH 1
283#define PRIO_NORMAL 0
284#define PRIO_LOW -1
285#define PRIO_IDLE -3
286#define PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
112{ 299{
113 AV *av; 300#if PERL_VERSION_ATLEAST (5,10,0)
114 I32 ix; 301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 302 get_sv (name, create);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 303#endif
117 SV **pname = AvARRAY (protopad_name); 304 return get_sv (name, create);
118 SV **ppad = AvARRAY (protopad); 305}
119 I32 fname = AvFILLp (protopad_name); 306
120 I32 fpad = AvFILLp (protopad); 307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
326
327static AV *
328coro_clone_padlist (pTHX_ CV *cv)
329{
330 AV *padlist = CvPADLIST (cv);
121 AV *newpadlist, *newpad_name, *newpad; 331 AV *newpadlist, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 332
132 newpadlist = newAV (); 333 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 335#if PERL_VERSION_ATLEAST (5,10,0)
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
337#else
338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
339#endif
340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
341 --AvFILLp (padlist);
342
343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
135 av_store (newpadlist, 1, (SV *) newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
136 345
137 av = newAV (); /* will be @_ */ 346 return newpadlist;
138 av_extend (av, 0); 347}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 348
142 for (ix = fpad; ix > 0; ix--) 349static void
350free_padlist (pTHX_ AV *padlist)
351{
352 /* may be during global destruction */
353 if (SvREFCNT (padlist))
143 { 354 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 355 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 356 while (i >= 0)
146 { 357 {
147 char *name = SvPVX (namesv); /* XXX */ 358 SV **svp = av_fetch (padlist, i--, FALSE);
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 359 if (svp)
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 360 {
152 else
153 { /* our own lexical */
154 SV *sv; 361 SV *sv;
155 if (*name == '&') 362 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156 sv = SvREFCNT_inc (ppad[ix]); 363 SvREFCNT_dec (sv);
157 else if (*name == '@') 364
158 sv = (SV *) newAV (); 365 SvREFCNT_dec (*svp);
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 } 366 }
167 } 367 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179 368
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC AV *
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist); 369 SvREFCNT_dec ((SV*)padlist);
220 } 370 }
221} 371}
222#endif 372
373static int
374coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
375{
376 AV *padlist;
377 AV *av = (AV *)mg->mg_obj;
378
379 /* casting is fun. */
380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
381 free_padlist (aTHX_ padlist);
382
383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
384
385 return 0;
386}
387
388#define CORO_MAGIC_type_cv 26
389#define CORO_MAGIC_type_state PERL_MAGIC_ext
390
391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
395
396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
398 ? SvMAGIC (sv) \
399 : mg_find (sv, type))
400
401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
223 438
224/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
225STATIC void 440static void
226get_padlist (CV *cv) 441get_padlist (pTHX_ CV *cv)
227{ 442{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
229 445
230 if (he && AvFILLp ((AV *)*he) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232 else 448 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 { 449 {
450#if CORO_PREFER_PERL_FUNCTIONS
451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
453 CV *cp = Perl_cv_clone (cv);
454 CvPADLIST (cv) = CvPADLIST (cp);
455 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (*he); 456 SvREFCNT_dec (cp);
244 *he = (SV *)newAV (); 457#else
458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
459#endif
245 } 460 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248} 461}
249 462
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
280#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void 463static void
464put_padlist (pTHX_ CV *cv)
465{
466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
468
469 if (expect_false (!mg))
470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
471
472 av = (AV *)mg->mg_obj;
473
474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
475 av_extend (av, AvMAX (av) + 1);
476
477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
478}
479
480/** load & save, init *******************************************************/
481
482static void
285load_state(pTHX_ Coro__State c) 483load_perl (pTHX_ Coro__State c)
286{ 484{
287 PL_dowarn = c->dowarn; 485 perl_slots *slot = c->slot;
486 c->slot = 0;
288 487
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 488 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_start_env = c->start_env;
315 PL_top_env = c->top_env;
316 489
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 490 GvSV (PL_defgv) = slot->defsv;
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 491 GvAV (PL_defgv) = slot->defav;
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
495 #define VAR(name,type) PL_ ## name = slot->name;
496 # include "state.h"
497 #undef VAR
320 498
321 { 499 {
322 dSP; 500 dSP;
501
323 CV *cv; 502 CV *cv;
324 503
325 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
327 { 506 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 508 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 509 CvPADLIST (cv) = (AV *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 510 }
341 511
342 PUTBACK; 512 PUTBACK;
343 } 513 }
344}
345 514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
517}
518
346static void 519static void
347save_state(pTHX_ Coro__State c, int flags) 520save_perl (pTHX_ Coro__State c)
348{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
349 { 525 {
350 dSP; 526 dSP;
351 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 531 /*
356 * the worst thing you can imagine happens first - we have to save 532 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 533 * (and reinitialize) all cv's in the whole callchain :(
358 */ 534 */
359 535
360 PUSHs (Nullsv); 536 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
362 for (;;) 538 for (;;)
363 { 539 {
364 do 540 while (expect_true (cxix >= 0))
365 { 541 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
367 543
368 if (CxTYPE(cx) == CXt_SUB) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
369 { 545 {
370 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
547
371 if (CvDEPTH(cv)) 548 if (expect_true (CvDEPTH (cv)))
372 { 549 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 550 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
389 554
390 get_padlist (cv); /* this is a monster */ 555 CvDEPTH (cv) = 0;
556 get_padlist (aTHX_ cv);
391 } 557 }
392 } 558 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 559 }
400 while (cxix >= 0);
401 560
402 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
403 break; 562 break;
404 563
405 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
408 } 567 }
409 568
410 PUTBACK; 569 PUTBACK;
411 } 570 }
412 571
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 574 if (SLOT_COUNT >= 1) CXINC;
575 if (SLOT_COUNT >= 2) CXINC;
576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 583
417 /* I have not the slightest idea of why av_reify is necessary */
418 /* but if it's missing the defav contents magically get replaced sometimes */
419 if (c->defav)
420 av_reify (c->defav);
421
422 c->dowarn = PL_dowarn;
423
424 c->curstackinfo = PL_curstackinfo;
425 c->curstack = PL_curstack;
426 c->mainstack = PL_mainstack; 584 c->mainstack = PL_mainstack;
427 c->stack_sp = PL_stack_sp; 585
428 c->op = PL_op; 586 {
429 c->curpad = PL_curpad; 587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
430 c->stack_base = PL_stack_base; 588
431 c->stack_max = PL_stack_max; 589 slot->defav = GvAV (PL_defgv);
432 c->tmps_stack = PL_tmps_stack; 590 slot->defsv = DEFSV;
433 c->tmps_floor = PL_tmps_floor; 591 slot->errsv = ERRSV;
434 c->tmps_ix = PL_tmps_ix; 592 slot->irsgv = GvSV (irsgv);
435 c->tmps_max = PL_tmps_max; 593
436 c->markstack = PL_markstack; 594 #define VAR(name,type) slot->name = PL_ ## name;
437 c->markstack_ptr = PL_markstack_ptr; 595 # include "state.h"
438 c->markstack_max = PL_markstack_max; 596 #undef VAR
439 c->scopestack = PL_scopestack; 597 }
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->start_env = PL_start_env;
450 c->top_env = PL_top_env;
451} 598}
452 599
453/* 600/*
454 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
455 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
456 * on the assumption that coroutines do not usually need 603 * on the (sometimes correct) assumption that coroutines do
457 * a lot of stackspace. 604 * not usually need a lot of stackspace.
458 */ 605 */
459STATIC void 606#if CORO_PREFER_PERL_FUNCTIONS
607# define coro_init_stacks init_stacks
608#else
609static void
460coro_init_stacks (pTHX) 610coro_init_stacks (pTHX)
461{ 611{
462 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 612 PL_curstackinfo = new_stackinfo(32, 8);
463 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
464 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
465 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466 616
467 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
468 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
469 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470 620
471 New(50,PL_tmps_stack,96,SV*); 621 New(50,PL_tmps_stack,32,SV*);
472 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
473 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
474 PL_tmps_max = 96; 624 PL_tmps_max = 32;
475 625
476 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
477 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
478 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
479 629
630#ifdef SET_MARK_OFFSET
480 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
632#endif
481 633
482 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
485 637
486 New(54,PL_savestack,96,ANY); 638 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
488 PL_savestack_max = 96; 640 PL_savestack_max = 24;
489 641
642#if !PERL_VERSION_ATLEAST (5,10,0)
490 New(54,PL_retstack,8,OP*); 643 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
492 PL_retstack_max = 8; 645 PL_retstack_max = 4;
646#endif
493} 647}
648#endif
494 649
495/* 650/*
496 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
497 * still there is a memleak of 128 bytes...
498 */ 652 */
499STATIC void 653static void
500destroy_stacks(pTHX) 654coro_destruct_stacks (pTHX)
501{ 655{
502 /* is this ugly, I ask? */
503 while (PL_scopestack_ix)
504 LEAVE;
505
506 /* sure it is, but more important: is it correct?? :/ */
507 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508 FREETMPS;
509
510 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
512 658
513 while (PL_curstackinfo) 659 while (PL_curstackinfo)
514 { 660 {
515 PERL_SI *p = PL_curstackinfo->si_prev; 661 PERL_SI *p = PL_curstackinfo->si_prev;
516 662
517 { 663 if (!IN_DESTRUCT)
518 dSP;
519 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520 PUTBACK; /* possibly superfluous */
521 }
522
523 dounwind(-1);
524
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 664 SvREFCNT_dec (PL_curstackinfo->si_stack);
665
526 Safefree(PL_curstackinfo->si_cxstack); 666 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 667 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 668 PL_curstackinfo = p;
529 } 669 }
530 670
531 Safefree(PL_tmps_stack); 671 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 672 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 673 Safefree (PL_scopestack);
534 Safefree(PL_savestack); 674 Safefree (PL_savestack);
675#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree(PL_retstack); 676 Safefree (PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#ifdef HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif 677#endif
678}
679
680static size_t
681coro_rss (pTHX_ struct coro *coro)
682{
683 size_t rss = sizeof (*coro);
684
685 if (coro->mainstack)
686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
690 if (coro->flags & CF_RUNNING)
555 { 691 {
556 /*FIXME*//*D*//* reasonable stack size! */ 692 slot = &tmp_slot;
557 stack->ssize = -4096 * sizeof (long); 693
558 New (0, stack->sptr, 4096, long); 694 #define VAR(name,type) slot->name = PL_ ## name;
695 # include "state.h"
696 #undef VAR
559 } 697 }
560 }
561 else 698 else
562 stack->sptr = 0; 699 slot = coro->slot;
563 700
564 ctx->stack = stack; 701 if (slot)
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 { 702 {
578#ifdef HAVE_MMAP 703 rss += sizeof (slot->curstackinfo);
579 if (stack->ssize > 0 && stack->sptr) 704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
580 munmap (stack->sptr, stack->ssize); 705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
581 else 706 rss += slot->tmps_max * sizeof (SV *);
582#else 707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
583 Safefree (stack->sptr); 708 rss += slot->scopestack_max * sizeof (I32);
709 rss += slot->savestack_max * sizeof (ANY);
710
711#if !PERL_VERSION_ATLEAST (5,10,0)
712 rss += slot->retstack_max * sizeof (OP *);
584#endif 713#endif
585 Safefree (stack);
586 } 714 }
587 else if (ctx->gencnt == stack->gencnt) 715 }
588 --stack->usecnt; 716
717 return rss;
718}
719
720/** coroutine stack handling ************************************************/
721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
742static int
743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
589 } 748 {
590} 749 SV **svp = 0;
591 750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
592static void 764static int
593setup_coro (void *arg) 765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
828coro_setup (pTHX_ struct coro *coro)
594{ 829{
595 /* 830 /*
596 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
597 */ 832 */
598 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601
602 coro_init_stacks (aTHX); 833 coro_init_stacks (aTHX);
603 JMPENV_BOOTSTRAP; 834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
604 SPAGAIN; 872 SPAGAIN;
873 }
605 874
606 /*PL_curcop = 0;*/ 875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 CORO_THROW = coro->except;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
607 SvREFCNT_dec (GvAV (PL_defgv)); 914 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args; 915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
609 919
610 if (ctx->stack) 920 SvREFCNT_dec (PL_diehook);
611 { 921 SvREFCNT_dec (PL_warnhook);
612 ctx->cursp = 0; 922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (CORO_THROW);
613 925
614 PUSHMARK(SP); 926 coro_destruct_stacks (aTHX);
615 PUTBACK; 927}
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 928
617 croak ("FATAL: CCTXT coroutine returned!"); 929INLINE void
930free_coro_mortal (pTHX)
931{
932 if (expect_true (coro_mortal))
618 } 933 {
619 else 934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
620 { 936 }
621 UNOP myop; 937}
622 938
623 PL_op = (OP *)&myop; 939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
624 946
625 Zero(&myop, 1, UNOP); 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 } 948 {
644} 949 PERL_ASYNC_CHECK ();
645 950
646static void 951 if (cctx->flags & CC_TRACE_ALL)
647continue_coro (void *arg)
648{
649 /*
650 * this is a _very_ stripped down perl interpreter ;)
651 */
652 Coro__State ctx = (Coro__State)arg;
653
654 ctx->cursp = 0;
655 PL_op = PL_op->op_next;
656 CALLRUNOPS(aTHX);
657 /*NORETURN*/
658 abort ();
659}
660
661STATIC void
662transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
663{
664 dSP;
665 dSTACKLEVEL;
666
667 if (prev != next)
668 {
669 if (next->mainstack)
670 { 952 {
671 SAVE (prev, flags); 953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
672 LOAD (next);
673
674 /* mark this state as in-use */
675 next->mainstack = 0;
676 next->tmps_ix = -2;
677
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 { 954 {
681 if (!prev->stack) 955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
682 allocate_stack (prev, 0); 956 SV **bot, **top;
683 else if (prev->cursp != stacklevel 957 AV *av = newAV (); /* return values */
684 && prev->stack->usecnt > 1) 958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
685 { 997 {
686 prev->gencnt = ++prev->stack->gencnt; 998 SV **cb;
687 prev->stack->usecnt = 1;
688 }
689 999
690 /* has our stack been invalidated? */ 1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
691 if (next->stack && next->stack->gencnt != next->gencnt)
692 { 1001 {
693 deallocate_stack (next); 1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
694 allocate_stack (next, 1); 1003
695 coro_create (&(next->stack->cctx), 1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
696 continue_coro, (void *)next, 1005 {
697 next->stack->sptr, labs (next->stack->ssize)); 1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
698 } 1032 }
699 1033
700 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1034 if (cctx->flags & CC_TRACE_LINE)
701 }
702
703 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else
707 {
708 SAVE (prev, -1); /* first get rid of the old state */
709
710 if (flags & TRANSFER_SAVE_CCTXT)
711 {
712 if (!prev->stack)
713 allocate_stack (prev, 0);
714
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 { 1035 {
717 setup_coro (next); 1036 dSP;
718 1037
719 prev->stack->refcnt++; 1038 PL_runops = RUNOPS_DEFAULT;
720 prev->stack->usecnt++; 1039 ENTER;
721 next->stack = prev->stack; 1040 SAVETMPS;
722 next->gencnt = prev->gencnt; 1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
723 } 1053 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 } 1054 }
732 } 1055 }
733 else
734 setup_coro (next);
735 } 1056 }
736 } 1057 }
737 1058
738 next->cursp = stacklevel; 1059 TAINT_NOT;
1060 return 0;
739} 1061}
740 1062
1063static struct coro_cctx *cctx_ssl_cctx;
1064static struct CoroSLF cctx_ssl_frame;
1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1082static void NOINLINE
1083cctx_prepare (pTHX_ coro_cctx *cctx)
1084{
1085 PL_top_env = &PL_start_env;
1086
1087 if (cctx->flags & CC_TRACE)
1088 PL_runops = runops_trace;
1089
1090 /* we already must be executing an SLF op, there is no other valid way
1091 * that can lead to creation of a new cctx */
1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1094
1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1096 cctx_ssl_cctx = cctx;
1097 cctx_ssl_frame = slf_frame;
1098
1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1100 slf_frame.check = slf_check_set_stacklevel;
1101}
1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
1134 /* somebody or something will hit me for both perl_run and PL_restartop */
1135 PL_restartop = PL_op;
1136 perl_run (PL_curinterp);
1137
1138 /*
1139 * If perl-run returns we assume exit() was being called or the coro
1140 * fell off the end, which seems to be the only valid (non-bug)
1141 * reason for perl_run to return. We try to exit by jumping to the
1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1143 * coroutine as Coro has no such concept
1144 */
1145 PL_top_env = main_top_env;
1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
1148}
1149
1150static coro_cctx *
1151cctx_new ()
1152{
1153 coro_cctx *cctx;
1154
1155 ++cctx_count;
1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182 void *stack_start;
1183 size_t stack_size;
1184
1185#if HAVE_MMAP
1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1187 /* mmap supposedly does allocate-on-write for us */
1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1189
1190 if (cctx->sptr != (void *)-1)
1191 {
1192 #if CORO_STACKGUARD
1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1194 #endif
1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1197 cctx->flags |= CC_MAPPED;
1198 }
1199 else
1200#endif
1201 {
1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1203 New (0, cctx->sptr, cctx_stacksize, long);
1204
1205 if (!cctx->sptr)
1206 {
1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1208 _exit (EXIT_FAILURE);
1209 }
1210
1211 stack_start = cctx->sptr;
1212 stack_size = cctx->ssize;
1213 }
1214
1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1217 #endif
1218
1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1220
1221 return cctx;
1222}
1223
1224static void
1225cctx_destroy (coro_cctx *cctx)
1226{
1227 if (!cctx)
1228 return;
1229
1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1236 #if CORO_USE_VALGRIND
1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1238 #endif
1239
1240#if HAVE_MMAP
1241 if (cctx->flags & CC_MAPPED)
1242 munmap (cctx->sptr, cctx->ssize);
1243 else
1244#endif
1245 Safefree (cctx->sptr);
1246 }
1247
1248 Safefree (cctx);
1249}
1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1253
1254static coro_cctx *
1255cctx_get (pTHX)
1256{
1257 while (expect_true (cctx_first))
1258 {
1259 coro_cctx *cctx = cctx_first;
1260 cctx_first = cctx->next;
1261 --cctx_idle;
1262
1263 if (expect_true (!CCTX_EXPIRED (cctx)))
1264 return cctx;
1265
1266 cctx_destroy (cctx);
1267 }
1268
1269 return cctx_new_run ();
1270}
1271
1272static void
1273cctx_put (coro_cctx *cctx)
1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
1277 /* free another cctx if overlimit */
1278 if (expect_false (cctx_idle >= cctx_max_idle))
1279 {
1280 coro_cctx *first = cctx_first;
1281 cctx_first = first->next;
1282 --cctx_idle;
1283
1284 cctx_destroy (first);
1285 }
1286
1287 ++cctx_idle;
1288 cctx->next = cctx_first;
1289 cctx_first = cctx;
1290}
1291
1292/** coroutine switching *****************************************************/
1293
1294static void
1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1320{
1321 dSTACKLEVEL;
1322
1323 /* sometimes transfer is only called to set idle_sp */
1324 if (expect_false (!next))
1325 {
1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1328 }
1329 else if (expect_true (prev != next))
1330 {
1331 coro_cctx *prev__cctx;
1332
1333 if (expect_false (prev->flags & CF_NEW))
1334 {
1335 /* create a new empty/source context */
1336 prev->cctx = cctx_new_empty ();
1337 prev->flags &= ~CF_NEW;
1338 prev->flags |= CF_RUNNING;
1339 }
1340
1341 prev->flags &= ~CF_RUNNING;
1342 next->flags |= CF_RUNNING;
1343
1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
1346
1347 if (expect_false (next->flags & CF_NEW))
1348 {
1349 /* need to start coroutine */
1350 next->flags &= ~CF_NEW;
1351 /* setup coroutine call */
1352 coro_setup (aTHX_ next);
1353 }
1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
1365 {
1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1368
1369 prev->cctx = 0;
1370
1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1376
1377 cctx_put (prev__cctx);
1378 }
1379
1380 ++next->usecount;
1381
1382 if (expect_true (!next->cctx))
1383 next->cctx = cctx_get (aTHX);
1384
1385 if (expect_false (prev__cctx != next->cctx))
1386 {
1387 prev__cctx->top_env = PL_top_env;
1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1390 }
1391
1392 transfer_tail (aTHX);
1393 }
1394}
1395
1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1398
1399/** high level stuff ********************************************************/
1400
1401static int
1402coro_state_destroy (pTHX_ struct coro *coro)
1403{
1404 if (coro->flags & CF_DESTROYED)
1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1420
1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1422 {
1423 struct coro temp;
1424
1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
1429
1430 coro_destruct (aTHX_ coro);
1431
1432 load_perl (aTHX_ &temp);
1433
1434 coro->slot = 0;
1435 }
1436
1437 cctx_destroy (coro->cctx);
1438 SvREFCNT_dec (coro->args);
1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
1445}
1446
1447static int
1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1449{
1450 struct coro *coro = (struct coro *)mg->mg_ptr;
1451 mg->mg_ptr = 0;
1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
1460
1461 return 0;
1462}
1463
1464static int
1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1466{
1467 struct coro *coro = (struct coro *)mg->mg_ptr;
1468
1469 ++coro->refcnt;
1470
1471 return 0;
1472}
1473
1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
1484
1485static void
1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1487{
1488 ta->prev = SvSTATE (prev_sv);
1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1491}
1492
1493static void
1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1495{
1496 struct coro_transfer_args ta;
1497
1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1499 TRANSFER (ta, 1);
1500}
1501
1502/** Coro ********************************************************************/
1503
1504INLINE void
1505coro_enq (pTHX_ struct coro *coro)
1506{
1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1508}
1509
1510INLINE SV *
1511coro_deq (pTHX)
1512{
1513 int prio;
1514
1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
1518
1519 return 0;
1520}
1521
1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1562
1563 return 1;
1564}
1565
1566static int
1567api_is_ready (pTHX_ SV *coro_sv)
1568{
1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1570}
1571
1572INLINE void
1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1574{
1575 SV *prev_sv, *next_sv;
1576
1577 for (;;)
1578 {
1579 next_sv = coro_deq (aTHX);
1580
1581 /* nothing to schedule: call the idle handler */
1582 if (expect_false (!next_sv))
1583 {
1584 dSP;
1585
1586 ENTER;
1587 SAVETMPS;
1588
1589 PUSHMARK (SP);
1590 PUTBACK;
1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1592
1593 FREETMPS;
1594 LEAVE;
1595 continue;
1596 }
1597
1598 ta->next = SvSTATE_hv (next_sv);
1599
1600 /* cannot transfer to destroyed coros, skip and look for next */
1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1602 {
1603 SvREFCNT_dec (next_sv);
1604 /* coro_nready has already been taken care of by destroy */
1605 continue;
1606 }
1607
1608 --coro_nready;
1609 break;
1610 }
1611
1612 /* free this only after the transfer */
1613 prev_sv = SvRV (coro_current);
1614 ta->prev = SvSTATE_hv (prev_sv);
1615 TRANSFER_CHECK (*ta);
1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1617 ta->next->flags &= ~CF_READY;
1618 SvRV_set (coro_current, next_sv);
1619
1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
1622}
1623
1624INLINE void
1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1626{
1627 api_ready (aTHX_ coro_current);
1628 prepare_schedule (aTHX_ ta);
1629}
1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1654static int
1655api_cede (pTHX)
1656{
1657 struct coro_transfer_args ta;
1658
1659 prepare_cede (aTHX_ &ta);
1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1664 return 1;
1665 }
1666 else
1667 return 0;
1668}
1669
1670static int
1671api_cede_notself (pTHX)
1672{
1673 if (coro_nready)
1674 {
1675 struct coro_transfer_args ta;
1676
1677 prepare_cede_notself (aTHX_ &ta);
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
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 /* exception handling */
1845 if (expect_false (CORO_THROW))
1846 {
1847 SV *exception = sv_2mortal (CORO_THROW);
1848
1849 CORO_THROW = 0;
1850 sv_setsv (ERRSV, exception);
1851 croak (0);
1852 }
1853
1854 /* return value handling - mostly like entersub */
1855 /* make sure we put something on the stack in scalar context */
1856 if (GIMME_V == G_SCALAR)
1857 {
1858 dSP;
1859 SV **bot = PL_stack_base + checkmark;
1860
1861 if (sp == bot) /* too few, push undef */
1862 bot [1] = &PL_sv_undef;
1863 else if (sp != bot + 1) /* too many, take last one */
1864 bot [1] = *sp;
1865
1866 SP = bot + 1;
1867
1868 PUTBACK;
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static SV *
2003coro_semaphore_new (int count)
2004{
2005 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2006 AV *av = newAV ();
2007 SV **ary;
2008
2009 /* unfortunately, building manually saves memory */
2010 Newx (ary, 2, SV *);
2011 AvALLOC (av) = ary;
2012 AvARRAY (av) = ary;
2013 AvMAX (av) = 1;
2014 AvFILLp (av) = 0;
2015 ary [0] = newSViv (count);
2016
2017 return newRV_noinc ((SV *)av);
2018}
2019
2020static void
2021coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2022{
2023 SV *count_sv = AvARRAY (av)[0];
2024 IV count = SvIVX (count_sv);
2025
2026 count += adjust;
2027 SvIVX (count_sv) = count;
2028
2029 /* now wake up as many waiters as are expected to lock */
2030 while (count > 0 && AvFILLp (av) > 0)
2031 {
2032 SV *cb;
2033
2034 /* swap first two elements so we can shift a waiter */
2035 AvARRAY (av)[0] = AvARRAY (av)[1];
2036 AvARRAY (av)[1] = count_sv;
2037 cb = av_shift (av);
2038
2039 if (SvOBJECT (cb))
2040 api_ready (aTHX_ cb);
2041 else
2042 croak ("callbacks not yet supported");
2043
2044 SvREFCNT_dec (cb);
2045
2046 --count;
2047 }
2048}
2049
2050static void
2051coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2052{
2053 /* call $sem->adjust (0) to possibly wake up some other waiters */
2054 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2055}
2056
2057static int
2058slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2059{
2060 AV *av = (AV *)frame->data;
2061 SV *count_sv = AvARRAY (av)[0];
2062
2063 /* if we are about to throw, don't actually acquire the lock, just throw */
2064 if (CORO_THROW)
2065 return 0;
2066 else if (SvIVX (count_sv) > 0)
2067 {
2068 SvSTATE_current->on_destroy = 0;
2069
2070 if (acquire)
2071 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2072 else
2073 coro_semaphore_adjust (aTHX_ av, 0);
2074
2075 return 0;
2076 }
2077 else
2078 {
2079 int i;
2080 /* if we were woken up but can't down, we look through the whole */
2081 /* waiters list and only add us if we aren't in there already */
2082 /* this avoids some degenerate memory usage cases */
2083
2084 for (i = 1; i <= AvFILLp (av); ++i)
2085 if (AvARRAY (av)[i] == SvRV (coro_current))
2086 return 1;
2087
2088 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2089 return 1;
2090 }
2091}
2092
2093static int
2094slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2095{
2096 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2097}
2098
2099static int
2100slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2101{
2102 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2103}
2104
2105static void
2106slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2107{
2108 AV *av = (AV *)SvRV (arg [0]);
2109
2110 if (SvIVX (AvARRAY (av)[0]) > 0)
2111 {
2112 frame->data = (void *)av;
2113 frame->prepare = prepare_nop;
2114 }
2115 else
2116 {
2117 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2118
2119 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2120 frame->prepare = prepare_schedule;
2121
2122 /* to avoid race conditions when a woken-up coro gets terminated */
2123 /* we arrange for a temporary on_destroy that calls adjust (0) */
2124 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2125 }
2126}
2127
2128static void
2129slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2130{
2131 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2132 frame->check = slf_check_semaphore_down;
2133}
2134
2135static void
2136slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2137{
2138 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2139 frame->check = slf_check_semaphore_wait;
2140}
2141
2142/*****************************************************************************/
2143/* gensub: simple closure generation utility */
2144
2145#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2146
2147/* create a closure from XS, returns a code reference */
2148/* the arg can be accessed via GENSUB_ARG from the callback */
2149/* the callback must use dXSARGS/XSRETURN */
2150static SV *
2151gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2152{
2153 CV *cv = (CV *)newSV (0);
2154
2155 sv_upgrade ((SV *)cv, SVt_PVCV);
2156
2157 CvANON_on (cv);
2158 CvISXSUB_on (cv);
2159 CvXSUB (cv) = xsub;
2160 GENSUB_ARG = arg;
2161
2162 return newRV_noinc ((SV *)cv);
2163}
2164
2165/*****************************************************************************/
2166/* Coro::AIO */
2167
2168#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2169
2170/* helper storage struct */
2171struct io_state
2172{
2173 int errorno;
2174 I32 laststype; /* U16 in 5.10.0 */
2175 int laststatval;
2176 Stat_t statcache;
2177};
2178
2179static void
2180coro_aio_callback (pTHX_ CV *cv)
2181{
2182 dXSARGS;
2183 AV *state = (AV *)GENSUB_ARG;
2184 SV *coro = av_pop (state);
2185 SV *data_sv = newSV (sizeof (struct io_state));
2186
2187 av_extend (state, items);
2188
2189 sv_upgrade (data_sv, SVt_PV);
2190 SvCUR_set (data_sv, sizeof (struct io_state));
2191 SvPOK_only (data_sv);
2192
2193 {
2194 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2195
2196 data->errorno = errno;
2197 data->laststype = PL_laststype;
2198 data->laststatval = PL_laststatval;
2199 data->statcache = PL_statcache;
2200 }
2201
2202 /* now build the result vector out of all the parameters and the data_sv */
2203 {
2204 int i;
2205
2206 for (i = 0; i < items; ++i)
2207 av_push (state, SvREFCNT_inc_NN (ST (i)));
2208 }
2209
2210 av_push (state, data_sv);
2211
2212 api_ready (aTHX_ coro);
2213 SvREFCNT_dec (coro);
2214 SvREFCNT_dec ((AV *)state);
2215}
2216
2217static int
2218slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2219{
2220 AV *state = (AV *)frame->data;
2221
2222 /* if we are about to throw, return early */
2223 /* this does not cancel the aio request, but at least */
2224 /* it quickly returns */
2225 if (CORO_THROW)
2226 return 0;
2227
2228 /* one element that is an RV? repeat! */
2229 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2230 return 1;
2231
2232 /* restore status */
2233 {
2234 SV *data_sv = av_pop (state);
2235 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2236
2237 errno = data->errorno;
2238 PL_laststype = data->laststype;
2239 PL_laststatval = data->laststatval;
2240 PL_statcache = data->statcache;
2241
2242 SvREFCNT_dec (data_sv);
2243 }
2244
2245 /* push result values */
2246 {
2247 dSP;
2248 int i;
2249
2250 EXTEND (SP, AvFILLp (state) + 1);
2251 for (i = 0; i <= AvFILLp (state); ++i)
2252 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2253
2254 PUTBACK;
2255 }
2256
2257 return 0;
2258}
2259
2260static void
2261slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2262{
2263 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2264 SV *coro_hv = SvRV (coro_current);
2265 struct coro *coro = SvSTATE_hv (coro_hv);
2266
2267 /* put our coroutine id on the state arg */
2268 av_push (state, SvREFCNT_inc_NN (coro_hv));
2269
2270 /* first see whether we have a non-zero priority and set it as AIO prio */
2271 if (coro->prio)
2272 {
2273 dSP;
2274
2275 static SV *prio_cv;
2276 static SV *prio_sv;
2277
2278 if (expect_false (!prio_cv))
2279 {
2280 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2281 prio_sv = newSViv (0);
2282 }
2283
2284 PUSHMARK (SP);
2285 sv_setiv (prio_sv, coro->prio);
2286 XPUSHs (prio_sv);
2287
2288 PUTBACK;
2289 call_sv (prio_cv, G_VOID | G_DISCARD);
2290 }
2291
2292 /* now call the original request */
2293 {
2294 dSP;
2295 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2296 int i;
2297
2298 PUSHMARK (SP);
2299
2300 /* first push all args to the stack */
2301 EXTEND (SP, items + 1);
2302
2303 for (i = 0; i < items; ++i)
2304 PUSHs (arg [i]);
2305
2306 /* now push the callback closure */
2307 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2308
2309 /* now call the AIO function - we assume our request is uncancelable */
2310 PUTBACK;
2311 call_sv ((SV *)req, G_VOID | G_DISCARD);
2312 }
2313
2314 /* now that the requets is going, we loop toll we have a result */
2315 frame->data = (void *)state;
2316 frame->prepare = prepare_schedule;
2317 frame->check = slf_check_aio_req;
2318}
2319
2320static void
2321coro_aio_req_xs (pTHX_ CV *cv)
2322{
2323 dXSARGS;
2324
2325 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2326
2327 XSRETURN_EMPTY;
2328}
2329
2330/*****************************************************************************/
2331
741MODULE = Coro::State PACKAGE = Coro::State 2332MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 2333
743PROTOTYPES: ENABLE 2334PROTOTYPES: DISABLE
744 2335
745BOOT: 2336BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 2337{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2338#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2339# if CORO_PTHREAD
2340 coro_thx = PERL_GET_CONTEXT;
2341# endif
2342#endif
2343 BOOT_PAGESIZE;
2344
2345 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2346 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2347
2348 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2349 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2350 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2351
2352 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2353 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2354 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2355
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2356 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 2357
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2358 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2359 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2360 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2361 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 2362
759 main_mainstack = PL_mainstack; 2363 main_mainstack = PL_mainstack;
760} 2364 main_top_env = PL_top_env;
761 2365
762Coro::State 2366 while (main_top_env->je_prev)
763_newprocess(args) 2367 main_top_env = main_top_env->je_prev;
764 SV * args 2368
765 PROTOTYPE: $ 2369 {
2370 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2371
2372 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2373 hv_store_ent (PL_custom_op_names, slf,
2374 newSVpv ("coro_slf", 0), 0);
2375
2376 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2377 hv_store_ent (PL_custom_op_descs, slf,
2378 newSVpv ("coro schedule like function", 0), 0);
2379 }
2380
2381 coroapi.ver = CORO_API_VERSION;
2382 coroapi.rev = CORO_API_REVISION;
2383
2384 coroapi.transfer = api_transfer;
2385
2386 coroapi.sv_state = SvSTATE_;
2387 coroapi.execute_slf = api_execute_slf;
2388 coroapi.prepare_nop = prepare_nop;
2389 coroapi.prepare_schedule = prepare_schedule;
2390 coroapi.prepare_cede = prepare_cede;
2391 coroapi.prepare_cede_notself = prepare_cede_notself;
2392
2393 {
2394 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2395
2396 if (!svp) croak ("Time::HiRes is required");
2397 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2398
2399 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2400 }
2401
2402 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2403}
2404
2405SV *
2406new (char *klass, ...)
766 CODE: 2407 CODE:
767 Coro__State coro; 2408{
2409 struct coro *coro;
2410 MAGIC *mg;
2411 HV *hv;
2412 int i;
768 2413
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
770 croak ("Coro::State::_newprocess expects an arrayref");
771
772 New (0, coro, 1, struct coro); 2414 Newz (0, coro, 1, struct coro);
2415 coro->args = newAV ();
2416 coro->flags = CF_NEW;
773 2417
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2418 if (coro_first) coro_first->prev = coro;
775 coro->mainstack = 0; /* actual work is done inside transfer */ 2419 coro->next = coro_first;
776 coro->stack = 0; 2420 coro_first = coro;
777 2421
778 RETVAL = coro; 2422 coro->hv = hv = newHV ();
2423 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2424 mg->mg_flags |= MGf_DUP;
2425 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2426
2427 av_extend (coro->args, items - 1);
2428 for (i = 1; i < items; i++)
2429 av_push (coro->args, newSVsv (ST (i)));
2430}
779 OUTPUT: 2431 OUTPUT:
780 RETVAL 2432 RETVAL
781 2433
782void 2434void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2435transfer (...)
784 Coro::State_or_hashref prev
785 Coro::State_or_hashref next
786 int flags
787 PROTOTYPE: @ 2436 PROTOTYPE: $$
788 CODE: 2437 CODE:
789 transfer (aTHX_ prev, next, flags); 2438 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2439
2440bool
2441_destroy (SV *coro_sv)
2442 CODE:
2443 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2444 OUTPUT:
2445 RETVAL
790 2446
791void 2447void
792DESTROY(coro) 2448_exit (int code)
793 Coro::State coro 2449 PROTOTYPE: $
794 CODE: 2450 CODE:
2451 _exit (code);
795 2452
796 if (coro->mainstack && coro->mainstack != main_mainstack) 2453int
2454cctx_stacksize (int new_stacksize = 0)
2455 PROTOTYPE: ;$
2456 CODE:
2457 RETVAL = cctx_stacksize;
2458 if (new_stacksize)
2459 {
2460 cctx_stacksize = new_stacksize;
2461 ++cctx_gen;
2462 }
2463 OUTPUT:
2464 RETVAL
2465
2466int
2467cctx_max_idle (int max_idle = 0)
2468 PROTOTYPE: ;$
2469 CODE:
2470 RETVAL = cctx_max_idle;
2471 if (max_idle > 1)
2472 cctx_max_idle = max_idle;
2473 OUTPUT:
2474 RETVAL
2475
2476int
2477cctx_count ()
2478 PROTOTYPE:
2479 CODE:
2480 RETVAL = cctx_count;
2481 OUTPUT:
2482 RETVAL
2483
2484int
2485cctx_idle ()
2486 PROTOTYPE:
2487 CODE:
2488 RETVAL = cctx_idle;
2489 OUTPUT:
2490 RETVAL
2491
2492void
2493list ()
2494 PROTOTYPE:
2495 PPCODE:
2496{
2497 struct coro *coro;
2498 for (coro = coro_first; coro; coro = coro->next)
2499 if (coro->hv)
2500 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2501}
2502
2503void
2504call (Coro::State coro, SV *coderef)
2505 ALIAS:
2506 eval = 1
2507 CODE:
2508{
2509 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
797 { 2510 {
798 struct coro temp; 2511 struct coro temp;
799 2512
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2513 if (!(coro->flags & CF_RUNNING))
801 LOAD(aTHX_ coro); 2514 {
2515 PUTBACK;
2516 save_perl (aTHX_ &temp);
2517 load_perl (aTHX_ coro);
2518 }
802 2519
803 destroy_stacks (aTHX); 2520 {
2521 dSP;
2522 ENTER;
2523 SAVETMPS;
2524 PUTBACK;
2525 PUSHSTACK;
2526 PUSHMARK (SP);
804 2527
805 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2528 if (ix)
2529 eval_sv (coderef, 0);
2530 else
2531 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
806 2532
807 coro->mainstack = 0; 2533 POPSTACK;
2534 SPAGAIN;
2535 FREETMPS;
2536 LEAVE;
2537 PUTBACK;
2538 }
2539
2540 if (!(coro->flags & CF_RUNNING))
2541 {
2542 save_perl (aTHX_ coro);
2543 load_perl (aTHX_ &temp);
2544 SPAGAIN;
2545 }
808 } 2546 }
2547}
809 2548
810 deallocate_stack (coro); 2549SV *
811 2550is_ready (Coro::State coro)
812 Safefree (coro); 2551 PROTOTYPE: $
2552 ALIAS:
2553 is_ready = CF_READY
2554 is_running = CF_RUNNING
2555 is_new = CF_NEW
2556 is_destroyed = CF_DESTROYED
2557 CODE:
2558 RETVAL = boolSV (coro->flags & ix);
2559 OUTPUT:
2560 RETVAL
813 2561
814void 2562void
815flush() 2563throw (Coro::State self, SV *throw = &PL_sv_undef)
2564 PROTOTYPE: $;$
2565 CODE:
2566{
2567 struct coro *current = SvSTATE_current;
2568 SV **throwp = self == current ? &CORO_THROW : &self->except;
2569 SvREFCNT_dec (*throwp);
2570 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2571}
2572
2573void
2574api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2575 PROTOTYPE: $;$
2576 C_ARGS: aTHX_ coro, flags
2577
2578SV *
2579has_cctx (Coro::State coro)
2580 PROTOTYPE: $
816 CODE: 2581 CODE:
817#ifdef MAY_FLUSH 2582 RETVAL = boolSV (!!coro->cctx);
818 flush_padlist_cache (); 2583 OUTPUT:
819#endif 2584 RETVAL
820 2585
821MODULE = Coro::State PACKAGE = Coro::Cont 2586int
2587is_traced (Coro::State coro)
2588 PROTOTYPE: $
2589 CODE:
2590 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2591 OUTPUT:
2592 RETVAL
822 2593
823# this is slightly dirty 2594UV
2595rss (Coro::State coro)
2596 PROTOTYPE: $
2597 ALIAS:
2598 usecount = 1
2599 CODE:
2600 switch (ix)
2601 {
2602 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2603 case 1: RETVAL = coro->usecount; break;
2604 }
2605 OUTPUT:
2606 RETVAL
824 2607
825void 2608void
826yield(...) 2609force_cctx ()
2610 PROTOTYPE:
2611 CODE:
2612 SvSTATE_current->cctx->idle_sp = 0;
2613
2614void
2615swap_defsv (Coro::State self)
827 PROTOTYPE: @ 2616 PROTOTYPE: $
2617 ALIAS:
2618 swap_defav = 1
828 CODE: 2619 CODE:
829 static SV *returnstk; 2620 if (!self->slot)
830 SV *sv; 2621 croak ("cannot swap state with coroutine that has no saved state,");
2622 else
2623 {
2624 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2625 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2626
2627 SV *tmp = *src; *src = *dst; *dst = tmp;
2628 }
2629
2630
2631MODULE = Coro::State PACKAGE = Coro
2632
2633BOOT:
2634{
2635 int i;
2636
2637 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2638 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2639 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2640
2641 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2642 SvREADONLY_on (coro_current);
2643
2644 coro_stash = gv_stashpv ("Coro", TRUE);
2645
2646 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2647 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2648 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2649 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2650 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2651 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2652
2653 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2654 coro_ready[i] = newAV ();
2655
2656 {
2657 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2658
2659 coroapi.schedule = api_schedule;
2660 coroapi.cede = api_cede;
2661 coroapi.cede_notself = api_cede_notself;
2662 coroapi.ready = api_ready;
2663 coroapi.is_ready = api_is_ready;
2664 coroapi.nready = coro_nready;
2665 coroapi.current = coro_current;
2666
2667 /*GCoroAPI = &coroapi;*/
2668 sv_setiv (sv, (IV)&coroapi);
2669 SvREADONLY_on (sv);
2670 }
2671}
2672
2673void
2674schedule (...)
2675 CODE:
2676 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2677
2678void
2679cede (...)
2680 CODE:
2681 CORO_EXECUTE_SLF_XS (slf_init_cede);
2682
2683void
2684cede_notself (...)
2685 CODE:
2686 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2687
2688void
2689_set_current (SV *current)
2690 PROTOTYPE: $
2691 CODE:
2692 SvREFCNT_dec (SvRV (coro_current));
2693 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2694
2695void
2696_set_readyhook (SV *hook)
2697 PROTOTYPE: $
2698 CODE:
2699 SvREFCNT_dec (coro_readyhook);
2700 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2701
2702int
2703prio (Coro::State coro, int newprio = 0)
2704 PROTOTYPE: $;$
2705 ALIAS:
2706 nice = 1
2707 CODE:
2708{
2709 RETVAL = coro->prio;
2710
2711 if (items > 1)
2712 {
2713 if (ix)
2714 newprio = coro->prio - newprio;
2715
2716 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2717 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2718
2719 coro->prio = newprio;
2720 }
2721}
2722 OUTPUT:
2723 RETVAL
2724
2725SV *
2726ready (SV *self)
2727 PROTOTYPE: $
2728 CODE:
2729 RETVAL = boolSV (api_ready (aTHX_ self));
2730 OUTPUT:
2731 RETVAL
2732
2733int
2734nready (...)
2735 PROTOTYPE:
2736 CODE:
2737 RETVAL = coro_nready;
2738 OUTPUT:
2739 RETVAL
2740
2741# for async_pool speedup
2742void
2743_pool_1 (SV *cb)
2744 CODE:
2745{
2746 HV *hv = (HV *)SvRV (coro_current);
2747 struct coro *coro = SvSTATE_hv ((SV *)hv);
831 AV *defav = GvAV (PL_defgv); 2748 AV *defav = GvAV (PL_defgv);
832 struct coro *prev, *next; 2749 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2750 AV *invoke_av;
2751 int i, len;
833 2752
834 if (!returnstk) 2753 if (!invoke)
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2754 {
2755 SV *old = PL_diehook;
2756 PL_diehook = 0;
2757 SvREFCNT_dec (old);
2758 croak ("\3async_pool terminate\2\n");
2759 }
836 2760
837 /* set up @_ -- ugly */ 2761 SvREFCNT_dec (coro->saved_deffh);
838 av_clear (defav); 2762 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2763
2764 hv_store (hv, "desc", sizeof ("desc") - 1,
2765 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2766
2767 invoke_av = (AV *)SvRV (invoke);
2768 len = av_len (invoke_av);
2769
2770 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2771
2772 if (len > 0)
2773 {
839 av_fill (defav, items - 1); 2774 av_fill (defav, len - 1);
840 while (items--) 2775 for (i = 0; i < len; ++i)
841 av_store (defav, items, SvREFCNT_inc (ST(items))); 2776 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2777 }
2778}
842 2779
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2780void
844 sv = av_pop ((AV *)SvRV (returnstk)); 2781_pool_2 (SV *cb)
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 2782 CODE:
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 2783{
2784 HV *hv = (HV *)SvRV (coro_current);
2785 struct coro *coro = SvSTATE_hv ((SV *)hv);
2786
2787 sv_setsv (cb, &PL_sv_undef);
2788
2789 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2790 coro->saved_deffh = 0;
2791
2792 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2793 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2794 {
2795 SV *old = PL_diehook;
2796 PL_diehook = 0;
847 SvREFCNT_dec (sv); 2797 SvREFCNT_dec (old);
2798 croak ("\3async_pool terminate\2\n");
2799 }
848 2800
849 transfer(aTHX_ prev, next, 0); 2801 av_clear (GvAV (PL_defgv));
2802 hv_store (hv, "desc", sizeof ("desc") - 1,
2803 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
850 2804
2805 coro->prio = 0;
2806
2807 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2808 api_trace (aTHX_ coro_current, 0);
2809
2810 av_push (av_async_pool, newSVsv (coro_current));
2811}
2812
2813
2814MODULE = Coro::State PACKAGE = PerlIO::cede
2815
2816BOOT:
2817 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2818
2819
2820MODULE = Coro::State PACKAGE = Coro::Semaphore
2821
2822SV *
2823new (SV *klass, SV *count = 0)
2824 CODE:
2825 RETVAL = sv_bless (
2826 coro_semaphore_new (count && SvOK (count) ? SvIV (count) : 1),
2827 GvSTASH (CvGV (cv))
2828 );
2829 OUTPUT:
2830 RETVAL
2831
2832# helper for Coro::Channel
2833SV *
2834_alloc (int count)
2835 CODE:
2836 RETVAL = coro_semaphore_new (count);
2837 OUTPUT:
2838 RETVAL
2839
2840SV *
2841count (SV *self)
2842 CODE:
2843 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2844 OUTPUT:
2845 RETVAL
2846
2847void
2848up (SV *self, int adjust = 1)
2849 ALIAS:
2850 adjust = 1
2851 CODE:
2852 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2853
2854void
2855down (SV *self)
2856 ALIAS:
2857 Coro::Signal::wait = 0
2858 CODE:
2859 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2860
2861void
2862wait (SV *self)
2863 CODE:
2864 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2865
2866void
2867try (SV *self)
2868 PPCODE:
2869{
2870 AV *av = (AV *)SvRV (self);
2871 SV *count_sv = AvARRAY (av)[0];
2872 IV count = SvIVX (count_sv);
2873
2874 if (count > 0)
2875 {
2876 --count;
2877 SvIVX (count_sv) = count;
2878 XSRETURN_YES;
2879 }
2880 else
2881 XSRETURN_NO;
2882}
2883
2884void
2885waiters (SV *self)
2886 PPCODE:
2887{
2888 AV *av = (AV *)SvRV (self);
2889 int wcount = AvFILLp (av) + 1 - 1;
2890
2891 if (GIMME_V == G_SCALAR)
2892 XPUSHs (sv_2mortal (newSViv (wcount)));
2893 else
2894 {
2895 int i;
2896 EXTEND (SP, wcount);
2897 for (i = 1; i <= wcount; ++i)
2898 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2899 }
2900}
2901
2902MODULE = Coro::State PACKAGE = Coro::Signal
2903
2904SV *
2905new (SV *klass)
2906 CODE:
2907 RETVAL = sv_bless (
2908 coro_semaphore_new (0),
2909 GvSTASH (CvGV (cv))
2910 );
2911 OUTPUT:
2912 RETVAL
2913
2914void
2915broadcast (SV *self, int adjust = 1)
2916 CODE:
2917{
2918 AV *av = (AV *)SvRV (self);
2919 SvIVX (AvARRAY (av)[0]) = 0; /* not necessary, but gives me fuzzy warm feelings */
2920 coro_semaphore_adjust (aTHX_ av, AvFILLp (av) + 1 - 1);
2921 SvIVX (AvARRAY (av)[0]) = 0; /* necessary */
2922}
2923
2924
2925MODULE = Coro::State PACKAGE = Coro::AnyEvent
2926
2927BOOT:
2928 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2929
2930void
2931_schedule (...)
2932 CODE:
2933{
2934 static int incede;
2935
2936 api_cede_notself (aTHX);
2937
2938 ++incede;
2939 while (coro_nready >= incede && api_cede (aTHX))
2940 ;
2941
2942 sv_setsv (sv_activity, &PL_sv_undef);
2943 if (coro_nready >= incede)
2944 {
2945 PUSHMARK (SP);
2946 PUTBACK;
2947 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2948 }
2949
2950 --incede;
2951}
2952
2953
2954MODULE = Coro::State PACKAGE = Coro::AIO
2955
2956void
2957_register (char *target, char *proto, SV *req)
2958 CODE:
2959{
2960 HV *st;
2961 GV *gvp;
2962 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2963 /* newXSproto doesn't return the CV on 5.8 */
2964 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2965 sv_setpv ((SV *)slf_cv, proto);
2966 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2967}
2968

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