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Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.333 by root, Thu Nov 27 12:39:00 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 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 */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.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
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
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) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <stdio.h> 83/* 5.11 */
33#include <errno.h> 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
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#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
34 114
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 116# undef CORO_STACKGUARD
37#endif 117#endif
38 118
39#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
40# define STACKGUARD 0 120# define CORO_STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif 121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
52# endif 161# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 162#endif
61#endif
62 163
63/* The next macro should declare a variable stacklevel that contains and approximation 164static double (*nvtime)(); /* so why doesn't it take void? */
64 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel)
68 165
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
70 169
71#include "CoroAPI.h" 170static U32 cctx_gen;
72 171static size_t cctx_stacksize = CORO_STACKSIZE;
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
88 211
89/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 213typedef struct coro_cctx
214{
91 struct coro_stack *next; 215 struct coro_cctx *next;
92 216
93 /* the stack */ 217 /* the stack */
94 void *sptr; 218 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
96 220
97 /* cpu state */ 221 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 224 JMPENV *top_env;
100 coro_context cctx; 225 coro_context cctx;
101} coro_stack; 226
227 U32 gen;
228#if CORO_USE_VALGRIND
229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243};
244
245/* the structure where most of the perl state is stored, overlaid on the cxstack */
246typedef struct
247{
248 SV *defsv;
249 AV *defav;
250 SV *errsv;
251 SV *irsgv;
252 HV *hinthv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 259
103/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
104struct coro { 261struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 263 coro_cctx *cctx;
107 264
108 /* data associated with this coroutine (initial args) */ 265 /* state data */
109 AV *args; 266 struct CoroSLF slf_frame; /* saved slf frame */
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 267 AV *mainstack;
125 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
126 OP *op; 269
127 SV **curpad; 270 CV *startcv; /* the CV to execute */
128 AV *comppad; 271 AV *args; /* data associated with this coroutine (initial args) */
129 CV *compcv; 272 int refcnt; /* coroutines are refcounted, yes */
130 SV **stack_base; 273 int flags; /* CF_ flags */
131 SV **stack_max; 274 HV *hv; /* the perl hash associated with this coro, if any */
132 SV **tmps_stack; 275 void (*on_destroy)(pTHX_ struct coro *coro);
133 I32 tmps_floor; 276
134 I32 tmps_ix; 277 /* statistics */
135 I32 tmps_max; 278 int usecount; /* number of transfers to this coro */
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 279
151 /* coro process data */ 280 /* coro process data */
152 int prio; 281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* linked list */
291 struct coro *next, *prev;
153}; 292};
154 293
155typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
157 296
158static AV * 297/* the following variables are effectively part of the perl context */
159coro_clone_padlist (pTHX_ CV *cv) 298/* and get copied between struct coro and these variables */
160{ 299/* the mainr easonw e don't support windows process emulation */
161 AV *padlist = CvPADLIST (cv); 300static struct CoroSLF slf_frame; /* the current slf frame */
162 AV *newpadlist, *newpad;
163
164 newpadlist = newAV ();
165 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist);
173
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad);
176
177 return newpadlist;
178}
179
180static void
181free_padlist (pTHX_ AV *padlist)
182{
183 /* may be during global destruction */
184 if (SvREFCNT (padlist))
185 {
186 I32 i = AvFILLp (padlist);
187 while (i >= 0)
188 {
189 SV **svp = av_fetch (padlist, i--, FALSE);
190 if (svp)
191 {
192 SV *sv;
193 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
194 SvREFCNT_dec (sv);
195
196 SvREFCNT_dec (*svp);
197 }
198 }
199
200 SvREFCNT_dec ((SV*)padlist);
201 }
202}
203
204static int
205coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
206{
207 AV *padlist;
208 AV *av = (AV *)mg->mg_obj;
209
210 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist);
213
214 SvREFCNT_dec (av);
215
216 return 0;
217}
218
219#define PERL_MAGIC_coro PERL_MAGIC_ext
220
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222
223/* the next two functions merely cache the padlists */
224static void
225get_padlist (pTHX_ CV *cv)
226{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
228
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
231 else
232 {
233#if 0
234 /* this is probably cleaner, but also slower? */
235 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp);
239#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
241#endif
242 }
243}
244
245static void
246put_padlist (pTHX_ CV *cv)
247{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
249
250 if (!mg)
251 {
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
259}
260
261#define SB do {
262#define SE } while (0)
263
264#define LOAD(state) load_state(aTHX_ (state));
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
268
269static void
270load_state(pTHX_ Coro__State c)
271{
272 PL_dowarn = c->dowarn;
273 PL_in_eval = c->in_eval;
274
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309
310 {
311 dSP;
312 CV *cv;
313
314 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs))
316 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist;
323 }
324
325 ++CvDEPTH(cv);
326 }
327
328 PUTBACK;
329 }
330}
331
332static void
333save_state(pTHX_ Coro__State c, int flags)
334{
335 {
336 dSP;
337 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo;
340
341 /*
342 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :(
344 */
345
346 PUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */
348 for (;;)
349 {
350 while (cxix >= 0)
351 {
352 PERL_CONTEXT *cx = &ccstk[cxix--];
353
354 if (CxTYPE(cx) == CXt_SUB)
355 {
356 CV *cv = cx->blk_sub.cv;
357 if (CvDEPTH(cv))
358 {
359 EXTEND (SP, CvDEPTH(cv)*2);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv));
369 PUSHs ((SV *)cv);
370
371 get_padlist (aTHX_ cv);
372 }
373 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 }
383
384 if (top_si->si_type == PERLSI_MAIN)
385 break;
386
387 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix;
390 }
391
392 PUTBACK;
393 }
394
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp;
406 c->op = PL_op;
407 c->curpad = PL_curpad;
408 c->comppad = PL_comppad;
409 c->compcv = PL_compcv;
410 c->stack_base = PL_stack_base;
411 c->stack_max = PL_stack_max;
412 c->tmps_stack = PL_tmps_stack;
413 c->tmps_floor = PL_tmps_floor;
414 c->tmps_ix = PL_tmps_ix;
415 c->tmps_max = PL_tmps_max;
416 c->markstack = PL_markstack;
417 c->markstack_ptr = PL_markstack_ptr;
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432}
433
434/*
435 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace.
439 */
440static void
441coro_init_stacks (pTHX)
442{
443 LOCK;
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449
450 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453
454 New(50,PL_tmps_stack,96,SV*);
455 PL_tmps_floor = -1;
456 PL_tmps_ix = -1;
457 PL_tmps_max = 96;
458
459 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16;
462
463#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET;
465#endif
466
467 New(54,PL_scopestack,16,I32);
468 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16;
470
471 New(54,PL_savestack,96,ANY);
472 PL_savestack_ix = 0;
473 PL_savestack_max = 96;
474
475#if PERL_VERSION < 9
476 New(54,PL_retstack,8,OP*);
477 PL_retstack_ix = 0;
478 PL_retstack_max = 8;
479#endif
480
481 UNLOCK;
482}
483
484/*
485 * destroy the stacks, the callchain etc...
486 */
487static void
488destroy_stacks(pTHX)
489{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next;
503
504 while (PL_curstackinfo)
505 {
506 PERL_SI *p = PL_curstackinfo->si_prev;
507
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519
520 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p;
523 }
524
525 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack);
527 Safefree (PL_scopestack);
528 Safefree (PL_savestack);
529#if PERL_VERSION < 9
530 Safefree (PL_retstack);
531#endif
532}
533
534static void
535setup_coro (struct coro *coro)
536{
537 /*
538 * emulate part of the perl startup here.
539 */
540 dTHX;
541 dSP;
542 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544
545 coro_init_stacks (aTHX);
546 /*PL_curcop = 0;*/
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */
548 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0;
550
551 SPAGAIN;
552
553 Zero (&myop, 1, UNOP);
554 myop.op_next = Nullop;
555 myop.op_flags = OPf_WANT_VOID;
556
557 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566}
567
568static void
569free_coro_mortal ()
570{
571 if (coro_mortal)
572 {
573 dTHX;
574
575 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0;
577 }
578}
579
580static void
581coro_run (void *arg)
582{
583 /*
584 * this is a _very_ stripped down perl interpreter ;)
585 */
586 dTHX;
587 int ret;
588
589 UNLOCK;
590
591 PL_top_env = &PL_start_env;
592
593 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595
596 /* continue at cctx_init, without entersub */
597 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599 /* somebody will hit me for both perl_run and PL_restartop */
600 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601 printf ("ret %d\n", ret);//D
602
603 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613
614#if HAVE_MMAP
615
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
617 /* mmap suppsedly does allocate-on-write for us */
618 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619
620 if (stack->sptr == (void *)-1)
621 {
622 perror ("FATAL: unable to mmap stack for coroutine");
623 _exit (EXIT_FAILURE);
624 }
625
626# if STACKGUARD
627 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
628# endif
629
630#else
631
632 stack->ssize = STACKSIZE * (long)sizeof (long);
633 New (0, stack->sptr, STACKSIZE, long);
634
635 if (!stack->sptr)
636 {
637 perror (stderr, "FATAL: unable to malloc stack for coroutine");
638 _exit (EXIT_FAILURE);
639 }
640
641#endif
642
643 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
644
645 return stack;
646}
647
648static void
649stack_free (coro_stack *stack)
650{
651 if (!stack)
652 return;
653
654#if HAVE_MMAP
655 munmap (stack->sptr, stack->ssize);
656#else
657 Safefree (stack->sptr);
658#endif
659
660 Safefree (stack);
661}
662
663static coro_stack *stack_first;
664
665static coro_stack *
666stack_get ()
667{
668 coro_stack *stack;
669
670 if (stack_first)
671 {
672 stack = stack_first;
673 stack_first = stack->next;
674 }
675 else
676 {
677 stack = stack_new ();
678 PL_op = PL_op->op_next;
679 }
680
681 return stack;
682}
683
684static void
685stack_put (coro_stack *stack)
686{
687 stack->next = stack_first;
688 stack_first = stack;
689}
690
691/* never call directly, always through the coro_state_transfer global variable */
692static void
693transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
694{
695 dSTACKLEVEL;
696
697 /* sometimes transfer is only called to set idle_sp */
698 if (flags == TRANSFER_SET_STACKLEVEL)
699 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
700 else if (prev != next)
701 {
702 coro_stack *prev__stack;
703
704 LOCK;
705
706 if (next->mainstack)
707 {
708 /* coroutine already started */
709 SAVE (prev, flags);
710 LOAD (next);
711 }
712 else
713 {
714 /* need to start coroutine */
715 /* first get rid of the old state */
716 SAVE (prev, -1);
717 /* setup coroutine call */
718 setup_coro (next);
719 /* need a stack */
720 next->stack = 0;
721 }
722
723 if (!prev->stack)
724 /* create a new empty context */
725 Newz (0, prev->stack, 1, coro_stack);
726
727 prev__stack = prev->stack;
728
729 /* possibly "free" the stack */
730 if (prev__stack->idle_sp == STACKLEVEL)
731 {
732 stack_put (prev__stack);
733 prev->stack = 0;
734 }
735
736 if (!next->stack)
737 next->stack = stack_get ();
738
739 if (prev__stack != next->stack)
740 {
741 prev__stack->top_env = PL_top_env;
742 PL_top_env = next->stack->top_env;
743 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
744 }
745
746 free_coro_mortal ();
747
748 UNLOCK;
749 }
750}
751
752/* use this function pointer to call the above function */
753/* this is done to increase chances of the compiler not inlining the call */
754/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757struct transfer_args
758{
759 struct coro *prev, *next;
760 int flags;
761};
762
763#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
764
765static void
766coro_state_destroy (struct coro *coro)
767{
768 if (coro->refcnt--)
769 return;
770
771 if (coro->mainstack && coro->mainstack != main_mainstack)
772 {
773 struct coro temp;
774
775 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
776 LOAD (aTHX_ coro);
777
778 destroy_stacks (aTHX);
779
780 LOAD ((&temp)); /* this will get rid of defsv etc.. */
781
782 coro->mainstack = 0;
783 }
784
785 stack_free (coro->stack);
786 SvREFCNT_dec (coro->args);
787 Safefree (coro);
788}
789
790static int
791coro_state_clear (SV *sv, MAGIC *mg)
792{
793 struct coro *coro = (struct coro *)mg->mg_ptr;
794 mg->mg_ptr = 0;
795
796 coro_state_destroy (coro);
797
798 return 0;
799}
800
801static int
802coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
803{
804 struct coro *coro = (struct coro *)mg->mg_ptr;
805
806 ++coro->refcnt;
807
808 return 0;
809}
810
811static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
812
813static struct coro *
814SvSTATE (SV *coro)
815{
816 HV *stash;
817 MAGIC *mg;
818
819 if (SvROK (coro))
820 coro = SvRV (coro);
821
822 stash = SvSTASH (coro);
823 if (stash != coro_stash && stash != coro_state_stash)
824 {
825 /* very slow, but rare, check */
826 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827 croak ("Coro::State object required");
828 }
829
830 mg = SvMAGIC (coro);
831 assert (mg->mg_type == PERL_MAGIC_ext);
832 return (struct coro *)mg->mg_ptr;
833}
834
835static void
836prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
837{
838 ta->prev = SvSTATE (prev);
839 ta->next = SvSTATE (next);
840 ta->flags = flags;
841}
842
843static void
844api_transfer (SV *prev, SV *next, int flags)
845{
846 dTHX;
847 struct transfer_args ta;
848
849 prepare_transfer (aTHX_ &ta, prev, next, flags);
850 TRANSFER (ta);
851}
852 301
853/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
854 303
855#define PRIO_MAX 3 304#define PRIO_MAX 3
856#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
858#define PRIO_LOW -1 307#define PRIO_LOW -1
859#define PRIO_IDLE -3 308#define PRIO_IDLE -3
860#define PRIO_MIN -4 309#define PRIO_MIN -4
861 310
862/* for Coro.pm */ 311/* for Coro.pm */
863static GV *coro_current, *coro_idle; 312static SV *coro_current;
313static SV *coro_readyhook;
864static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
865static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
866 318
867static void 319/** lowlevel stuff **********************************************************/
868coro_enq (pTHX_ SV *sv)
869{
870 int prio;
871
872 if (SvTYPE (sv) != SVt_PVHV)
873 croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875 prio = SvSTATE (sv)->prio;
876
877 av_push (coro_ready [prio - PRIO_MIN], sv);
878 coro_nready++;
879}
880 320
881static SV * 321static SV *
882coro_deq (pTHX_ int min_prio) 322coro_get_sv (pTHX_ const char *name, int create)
883{ 323{
884 int prio = PRIO_MAX - PRIO_MIN; 324#if PERL_VERSION_ATLEAST (5,10,0)
885 325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
886 min_prio -= PRIO_MIN; 326 get_sv (name, create);
887 if (min_prio < 0) 327#endif
888 min_prio = 0; 328 return get_sv (name, create);
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891 if (AvFILLp (coro_ready [prio]) >= 0)
892 {
893 coro_nready--;
894 return av_shift (coro_ready [prio]);
895 }
896
897 return 0;
898} 329}
899 330
900static void 331static AV *
901api_ready (SV *coro) 332coro_get_av (pTHX_ const char *name, int create)
902{ 333{
903 dTHX; 334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360/*****************************************************************************/
361/* magic glue */
362
363#define CORO_MAGIC_type_cv 26
364#define CORO_MAGIC_type_state PERL_MAGIC_ext
365
366#define CORO_MAGIC_NN(sv, type) \
367 (expect_true (SvMAGIC (sv)->mg_type == type) \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type))
370
371#define CORO_MAGIC(sv, type) \
372 (expect_true (SvMAGIC (sv)) \
373 ? CORO_MAGIC_NN (sv, type) \
374 : 0)
375
376#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
377#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
378
379INLINE struct coro *
380SvSTATE_ (pTHX_ SV *coro)
381{
382 HV *stash;
383 MAGIC *mg;
904 384
905 if (SvROK (coro)) 385 if (SvROK (coro))
906 coro = SvRV (coro); 386 coro = SvRV (coro);
907 387
908 LOCK; 388 if (expect_false (SvTYPE (coro) != SVt_PVHV))
909 coro_enq (aTHX_ SvREFCNT_inc (coro)); 389 croak ("Coro::State object required");
910 UNLOCK;
911}
912 390
391 stash = SvSTASH (coro);
392 if (expect_false (stash != coro_stash && stash != coro_state_stash))
393 {
394 /* very slow, but rare, check */
395 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
396 croak ("Coro::State object required");
397 }
398
399 mg = CORO_MAGIC_state (coro);
400 return (struct coro *)mg->mg_ptr;
401}
402
403#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
404
405/* faster than SvSTATE, but expects a coroutine hv */
406#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
407#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408
409/*****************************************************************************/
410/* padlist management and caching */
411
412static AV *
413coro_derive_padlist (pTHX_ CV *cv)
414{
415 AV *padlist = CvPADLIST (cv);
416 AV *newpadlist, *newpad;
417
418 newpadlist = newAV ();
419 AvREAL_off (newpadlist);
420#if PERL_VERSION_ATLEAST (5,10,0)
421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
422#else
423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
424#endif
425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
426 --AvFILLp (padlist);
427
428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
429 av_store (newpadlist, 1, (SV *)newpad);
430
431 return newpadlist;
432}
433
434static void
435free_padlist (pTHX_ AV *padlist)
436{
437 /* may be during global destruction */
438 if (!IN_DESTRUCT)
439 {
440 I32 i = AvFILLp (padlist);
441
442 while (i > 0) /* special-case index 0 */
443 {
444 /* we try to be extra-careful here */
445 AV *av = (AV *)AvARRAY (padlist)[i--];
446 I32 j = AvFILLp (av);
447
448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
452 SvREFCNT_dec (av);
453 }
454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
458 SvREFCNT_dec ((SV*)padlist);
459 }
460}
461
913static void 462static int
463coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
464{
465 AV *padlist;
466 AV *av = (AV *)mg->mg_obj;
467
468 /* casting is fun. */
469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
470 free_padlist (aTHX_ padlist);
471
472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
473
474 return 0;
475}
476
477static MGVTBL coro_cv_vtbl = {
478 0, 0, 0, 0,
479 coro_cv_free
480};
481
482/* the next two functions merely cache the padlists */
483static void
484get_padlist (pTHX_ CV *cv)
485{
486 MAGIC *mg = CORO_MAGIC_cv (cv);
487 AV *av;
488
489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
491 else
492 {
493#if CORO_PREFER_PERL_FUNCTIONS
494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
496 CV *cp = Perl_cv_clone (aTHX_ cv);
497 CvPADLIST (cv) = CvPADLIST (cp);
498 CvPADLIST (cp) = 0;
499 SvREFCNT_dec (cp);
500#else
501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
502#endif
503 }
504}
505
506static void
507put_padlist (pTHX_ CV *cv)
508{
509 MAGIC *mg = CORO_MAGIC_cv (cv);
510 AV *av;
511
512 if (expect_false (!mg))
513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
514
515 av = (AV *)mg->mg_obj;
516
517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
518 av_extend (av, AvFILLp (av) + 1);
519
520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
521}
522
523/** load & save, init *******************************************************/
524
525static void
526load_perl (pTHX_ Coro__State c)
527{
528 perl_slots *slot = c->slot;
529 c->slot = 0;
530
531 PL_mainstack = c->mainstack;
532
533 GvSV (PL_defgv) = slot->defsv;
534 GvAV (PL_defgv) = slot->defav;
535 GvSV (PL_errgv) = slot->errsv;
536 GvSV (irsgv) = slot->irsgv;
537 GvHV (PL_hintgv) = slot->hinthv;
538
539 #define VAR(name,type) PL_ ## name = slot->name;
540 # include "state.h"
541 #undef VAR
542
543 {
544 dSP;
545
546 CV *cv;
547
548 /* now do the ugly restore mess */
549 while (expect_true (cv = (CV *)POPs))
550 {
551 put_padlist (aTHX_ cv); /* mark this padlist as available */
552 CvDEPTH (cv) = PTR2IV (POPs);
553 CvPADLIST (cv) = (AV *)POPs;
554 }
555
556 PUTBACK;
557 }
558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
561}
562
563static void
564save_perl (pTHX_ Coro__State c)
565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
569 {
570 dSP;
571 I32 cxix = cxstack_ix;
572 PERL_CONTEXT *ccstk = cxstack;
573 PERL_SI *top_si = PL_curstackinfo;
574
575 /*
576 * the worst thing you can imagine happens first - we have to save
577 * (and reinitialize) all cv's in the whole callchain :(
578 */
579
580 XPUSHs (Nullsv);
581 /* this loop was inspired by pp_caller */
582 for (;;)
583 {
584 while (expect_true (cxix >= 0))
585 {
586 PERL_CONTEXT *cx = &ccstk[cxix--];
587
588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
589 {
590 CV *cv = cx->blk_sub.cv;
591
592 if (expect_true (CvDEPTH (cv)))
593 {
594 EXTEND (SP, 3);
595 PUSHs ((SV *)CvPADLIST (cv));
596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
597 PUSHs ((SV *)cv);
598
599 CvDEPTH (cv) = 0;
600 get_padlist (aTHX_ cv);
601 }
602 }
603 }
604
605 if (expect_true (top_si->si_type == PERLSI_MAIN))
606 break;
607
608 top_si = top_si->si_prev;
609 ccstk = top_si->si_cxstack;
610 cxix = top_si->si_cxix;
611 }
612
613 PUTBACK;
614 }
615
616 /* allocate some space on the context stack for our purposes */
617 /* we manually unroll here, as usually 2 slots is enough */
618 if (SLOT_COUNT >= 1) CXINC;
619 if (SLOT_COUNT >= 2) CXINC;
620 if (SLOT_COUNT >= 3) CXINC;
621 {
622 int i;
623 for (i = 3; i < SLOT_COUNT; ++i)
624 CXINC;
625 }
626 cxstack_ix -= SLOT_COUNT; /* undo allocation */
627
628 c->mainstack = PL_mainstack;
629
630 {
631 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
632
633 slot->defav = GvAV (PL_defgv);
634 slot->defsv = DEFSV;
635 slot->errsv = ERRSV;
636 slot->irsgv = GvSV (irsgv);
637 slot->hinthv = GvHV (PL_hintgv);
638
639 #define VAR(name,type) slot->name = PL_ ## name;
640 # include "state.h"
641 #undef VAR
642 }
643}
644
645/*
646 * allocate various perl stacks. This is almost an exact copy
647 * of perl.c:init_stacks, except that it uses less memory
648 * on the (sometimes correct) assumption that coroutines do
649 * not usually need a lot of stackspace.
650 */
651#if CORO_PREFER_PERL_FUNCTIONS
652# define coro_init_stacks(thx) init_stacks ()
653#else
654static void
655coro_init_stacks (pTHX)
656{
657 PL_curstackinfo = new_stackinfo(32, 8);
658 PL_curstackinfo->si_type = PERLSI_MAIN;
659 PL_curstack = PL_curstackinfo->si_stack;
660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
661
662 PL_stack_base = AvARRAY(PL_curstack);
663 PL_stack_sp = PL_stack_base;
664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
665
666 New(50,PL_tmps_stack,32,SV*);
667 PL_tmps_floor = -1;
668 PL_tmps_ix = -1;
669 PL_tmps_max = 32;
670
671 New(54,PL_markstack,16,I32);
672 PL_markstack_ptr = PL_markstack;
673 PL_markstack_max = PL_markstack + 16;
674
675#ifdef SET_MARK_OFFSET
676 SET_MARK_OFFSET;
677#endif
678
679 New(54,PL_scopestack,8,I32);
680 PL_scopestack_ix = 0;
681 PL_scopestack_max = 8;
682
683 New(54,PL_savestack,24,ANY);
684 PL_savestack_ix = 0;
685 PL_savestack_max = 24;
686
687#if !PERL_VERSION_ATLEAST (5,10,0)
688 New(54,PL_retstack,4,OP*);
689 PL_retstack_ix = 0;
690 PL_retstack_max = 4;
691#endif
692}
693#endif
694
695/*
696 * destroy the stacks, the callchain etc...
697 */
698static void
699coro_destruct_stacks (pTHX)
700{
701 while (PL_curstackinfo->si_next)
702 PL_curstackinfo = PL_curstackinfo->si_next;
703
704 while (PL_curstackinfo)
705 {
706 PERL_SI *p = PL_curstackinfo->si_prev;
707
708 if (!IN_DESTRUCT)
709 SvREFCNT_dec (PL_curstackinfo->si_stack);
710
711 Safefree (PL_curstackinfo->si_cxstack);
712 Safefree (PL_curstackinfo);
713 PL_curstackinfo = p;
714 }
715
716 Safefree (PL_tmps_stack);
717 Safefree (PL_markstack);
718 Safefree (PL_scopestack);
719 Safefree (PL_savestack);
720#if !PERL_VERSION_ATLEAST (5,10,0)
721 Safefree (PL_retstack);
722#endif
723}
724
725#define CORO_RSS \
726 rss += sizeof (SYM (curstackinfo)); \
727 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
728 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
729 rss += SYM (tmps_max) * sizeof (SV *); \
730 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
731 rss += SYM (scopestack_max) * sizeof (I32); \
732 rss += SYM (savestack_max) * sizeof (ANY);
733
734static size_t
735coro_rss (pTHX_ struct coro *coro)
736{
737 size_t rss = sizeof (*coro);
738
739 if (coro->mainstack)
740 {
741 if (coro->flags & CF_RUNNING)
742 {
743 #define SYM(sym) PL_ ## sym
744 CORO_RSS;
745 #undef SYM
746 }
747 else
748 {
749 #define SYM(sym) coro->slot->sym
750 CORO_RSS;
751 #undef SYM
752 }
753 }
754
755 return rss;
756}
757
758/** coroutine stack handling ************************************************/
759
760static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
761static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
762static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
763
764/* apparently < 5.8.8 */
765#ifndef MgPV_nolen_const
766#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
767 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
768 (const char*)(mg)->mg_ptr)
769#endif
770
771/*
772 * This overrides the default magic get method of %SIG elements.
773 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
774 * and instead of tryign to save and restore the hash elements, we just provide
775 * readback here.
776 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
777 * not expecting this to actually change the hook. This is a potential problem
778 * when a schedule happens then, but we ignore this.
779 */
780static int
781coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
782{
783 const char *s = MgPV_nolen_const (mg);
784
785 if (*s == '_')
786 {
787 SV **svp = 0;
788
789 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
790 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
791
792 if (svp)
793 {
794 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = 0;
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
824}
825
826static int
827coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
828{
829 const char *s = MgPV_nolen_const (mg);
830
831 if (*s == '_')
832 {
833 SV **svp = 0;
834
835 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
836 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
837
838 if (svp)
839 {
840 SV *old = *svp;
841 *svp = newSVsv (sv);
842 SvREFCNT_dec (old);
843 return 0;
844 }
845 }
846
847 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
848}
849
850static void
851prepare_nop (pTHX_ struct coro_transfer_args *ta)
852{
853 /* kind of mega-hacky, but works */
854 ta->next = ta->prev = (struct coro *)ta;
855}
856
857static int
858slf_check_nop (pTHX_ struct CoroSLF *frame)
859{
860 return 0;
861}
862
863static int
864slf_check_repeat (pTHX_ struct CoroSLF *frame)
865{
866 return 1;
867}
868
869static UNOP coro_setup_op;
870
871static void NOINLINE /* noinline to keep it out of the transfer fast path */
872coro_setup (pTHX_ struct coro *coro)
873{
874 /*
875 * emulate part of the perl startup here.
876 */
877 coro_init_stacks (aTHX);
878
879 PL_runops = RUNOPS_DEFAULT;
880 PL_curcop = &PL_compiling;
881 PL_in_eval = EVAL_NULL;
882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
886 PL_curpm = 0;
887 PL_curpad = 0;
888 PL_localizing = 0;
889 PL_dirty = 0;
890 PL_restartop = 0;
891#if PERL_VERSION_ATLEAST (5,10,0)
892 PL_parser = 0;
893#endif
894 PL_hints = 0;
895
896 /* recreate the die/warn hooks */
897 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
898 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
899
900 GvSV (PL_defgv) = newSV (0);
901 GvAV (PL_defgv) = coro->args; coro->args = 0;
902 GvSV (PL_errgv) = newSV (0);
903 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
904 GvHV (PL_hintgv) = 0;
905 PL_rs = newSVsv (GvSV (irsgv));
906 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
907
908 {
909 dSP;
910 UNOP myop;
911
912 Zero (&myop, 1, UNOP);
913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
915 myop.op_flags = OPf_WANT_VOID;
916
917 PUSHMARK (SP);
918 PUSHs ((SV *)coro->startcv);
919 PUTBACK;
920 PL_op = (OP *)&myop;
921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
922 }
923
924 /* this newly created coroutine might be run on an existing cctx which most
925 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
926 */
927 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
928 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
929
930 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
931 coro_setup_op.op_next = PL_op;
932 coro_setup_op.op_type = OP_ENTERSUB;
933 coro_setup_op.op_ppaddr = pp_slf;
934 /* no flags etc. required, as an init function won't be called */
935
936 PL_op = (OP *)&coro_setup_op;
937
938 /* copy throw, in case it was set before coro_setup */
939 CORO_THROW = coro->except;
940}
941
942static void
943coro_destruct (pTHX_ struct coro *coro)
944{
945 if (!IN_DESTRUCT)
946 {
947 /* restore all saved variables and stuff */
948 LEAVE_SCOPE (0);
949 assert (PL_tmps_floor == -1);
950
951 /* free all temporaries */
952 FREETMPS;
953 assert (PL_tmps_ix == -1);
954
955 /* unwind all extra stacks */
956 POPSTACK_TO (PL_mainstack);
957
958 /* unwind main stack */
959 dounwind (-1);
960 }
961
962 SvREFCNT_dec (GvSV (PL_defgv));
963 SvREFCNT_dec (GvAV (PL_defgv));
964 SvREFCNT_dec (GvSV (PL_errgv));
965 SvREFCNT_dec (PL_defoutgv);
966 SvREFCNT_dec (PL_rs);
967 SvREFCNT_dec (GvSV (irsgv));
968 SvREFCNT_dec (GvHV (PL_hintgv));
969
970 SvREFCNT_dec (PL_diehook);
971 SvREFCNT_dec (PL_warnhook);
972
973 SvREFCNT_dec (coro->saved_deffh);
974 SvREFCNT_dec (coro->rouse_cb);
975 SvREFCNT_dec (coro->invoke_cb);
976 SvREFCNT_dec (coro->invoke_av);
977
978 coro_destruct_stacks (aTHX);
979}
980
981INLINE void
982free_coro_mortal (pTHX)
983{
984 if (expect_true (coro_mortal))
985 {
986 SvREFCNT_dec (coro_mortal);
987 coro_mortal = 0;
988 }
989}
990
991static int
992runops_trace (pTHX)
993{
994 COP *oldcop = 0;
995 int oldcxix = -2;
996
997 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
998 {
999 PERL_ASYNC_CHECK ();
1000
1001 if (cctx_current->flags & CC_TRACE_ALL)
1002 {
1003 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1004 {
1005 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1006 SV **bot, **top;
1007 AV *av = newAV (); /* return values */
1008 SV **cb;
1009 dSP;
1010
1011 GV *gv = CvGV (cx->blk_sub.cv);
1012 SV *fullname = sv_2mortal (newSV (0));
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 bot = PL_stack_base + cx->blk_oldsp + 1;
1017 top = cx->blk_gimme == G_ARRAY ? SP + 1
1018 : cx->blk_gimme == G_SCALAR ? bot + 1
1019 : bot;
1020
1021 av_extend (av, top - bot);
1022 while (bot < top)
1023 av_push (av, SvREFCNT_inc_NN (*bot++));
1024
1025 PL_runops = RUNOPS_DEFAULT;
1026 ENTER;
1027 SAVETMPS;
1028 EXTEND (SP, 3);
1029 PUSHMARK (SP);
1030 PUSHs (&PL_sv_no);
1031 PUSHs (fullname);
1032 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1033 PUTBACK;
1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1036 SPAGAIN;
1037 FREETMPS;
1038 LEAVE;
1039 PL_runops = runops_trace;
1040 }
1041
1042 if (oldcop != PL_curcop)
1043 {
1044 oldcop = PL_curcop;
1045
1046 if (PL_curcop != &PL_compiling)
1047 {
1048 SV **cb;
1049
1050 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1051 {
1052 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1053
1054 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1055 {
1056 dSP;
1057 GV *gv = CvGV (cx->blk_sub.cv);
1058 SV *fullname = sv_2mortal (newSV (0));
1059
1060 if (isGV (gv))
1061 gv_efullname3 (fullname, gv, 0);
1062
1063 PL_runops = RUNOPS_DEFAULT;
1064 ENTER;
1065 SAVETMPS;
1066 EXTEND (SP, 3);
1067 PUSHMARK (SP);
1068 PUSHs (&PL_sv_yes);
1069 PUSHs (fullname);
1070 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1071 PUTBACK;
1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1074 SPAGAIN;
1075 FREETMPS;
1076 LEAVE;
1077 PL_runops = runops_trace;
1078 }
1079
1080 oldcxix = cxstack_ix;
1081 }
1082
1083 if (cctx_current->flags & CC_TRACE_LINE)
1084 {
1085 dSP;
1086
1087 PL_runops = RUNOPS_DEFAULT;
1088 ENTER;
1089 SAVETMPS;
1090 EXTEND (SP, 3);
1091 PL_runops = RUNOPS_DEFAULT;
1092 PUSHMARK (SP);
1093 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1094 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1095 PUTBACK;
1096 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1097 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1098 SPAGAIN;
1099 FREETMPS;
1100 LEAVE;
1101 PL_runops = runops_trace;
1102 }
1103 }
1104 }
1105 }
1106 }
1107
1108 TAINT_NOT;
1109 return 0;
1110}
1111
1112static struct CoroSLF cctx_ssl_frame;
1113
1114static void
1115slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1116{
1117 ta->prev = 0;
1118}
1119
1120static int
1121slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1122{
1123 *frame = cctx_ssl_frame;
1124
1125 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1126}
1127
1128/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1129static void NOINLINE
1130cctx_prepare (pTHX)
1131{
1132 PL_top_env = &PL_start_env;
1133
1134 if (cctx_current->flags & CC_TRACE)
1135 PL_runops = runops_trace;
1136
1137 /* we already must be executing an SLF op, there is no other valid way
1138 * that can lead to creation of a new cctx */
1139 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1140 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1141
1142 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1143 cctx_ssl_frame = slf_frame;
1144
1145 slf_frame.prepare = slf_prepare_set_stacklevel;
1146 slf_frame.check = slf_check_set_stacklevel;
1147}
1148
1149/* the tail of transfer: execute stuff we can only do after a transfer */
1150INLINE void
1151transfer_tail (pTHX)
1152{
1153 free_coro_mortal (aTHX);
1154}
1155
1156/*
1157 * this is a _very_ stripped down perl interpreter ;)
1158 */
1159static void
1160cctx_run (void *arg)
1161{
1162#ifdef USE_ITHREADS
1163# if CORO_PTHREAD
1164 PERL_SET_CONTEXT (coro_thx);
1165# endif
1166#endif
1167 {
1168 dTHX;
1169
1170 /* normally we would need to skip the entersub here */
1171 /* not doing so will re-execute it, which is exactly what we want */
1172 /* PL_nop = PL_nop->op_next */
1173
1174 /* inject a fake subroutine call to cctx_init */
1175 cctx_prepare (aTHX);
1176
1177 /* cctx_run is the alternative tail of transfer() */
1178 transfer_tail (aTHX);
1179
1180 /* somebody or something will hit me for both perl_run and PL_restartop */
1181 PL_restartop = PL_op;
1182 perl_run (PL_curinterp);
1183 /*
1184 * Unfortunately, there is no way to get at the return values of the
1185 * coro body here, as perl_run destroys these
1186 */
1187
1188 /*
1189 * If perl-run returns we assume exit() was being called or the coro
1190 * fell off the end, which seems to be the only valid (non-bug)
1191 * reason for perl_run to return. We try to exit by jumping to the
1192 * bootstrap-time "top" top_env, as we cannot restore the "main"
1193 * coroutine as Coro has no such concept.
1194 * This actually isn't valid with the pthread backend, but OSes requiring
1195 * that backend are too broken to do it in a standards-compliant way.
1196 */
1197 PL_top_env = main_top_env;
1198 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1199 }
1200}
1201
1202static coro_cctx *
1203cctx_new ()
1204{
1205 coro_cctx *cctx;
1206
1207 ++cctx_count;
1208 New (0, cctx, 1, coro_cctx);
1209
1210 cctx->gen = cctx_gen;
1211 cctx->flags = 0;
1212 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1213
1214 return cctx;
1215}
1216
1217/* create a new cctx only suitable as source */
1218static coro_cctx *
1219cctx_new_empty ()
1220{
1221 coro_cctx *cctx = cctx_new ();
1222
1223 cctx->sptr = 0;
1224 coro_create (&cctx->cctx, 0, 0, 0, 0);
1225
1226 return cctx;
1227}
1228
1229/* create a new cctx suitable as destination/running a perl interpreter */
1230static coro_cctx *
1231cctx_new_run ()
1232{
1233 coro_cctx *cctx = cctx_new ();
1234 void *stack_start;
1235 size_t stack_size;
1236
1237#if HAVE_MMAP
1238 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1239 /* mmap supposedly does allocate-on-write for us */
1240 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1241
1242 if (cctx->sptr != (void *)-1)
1243 {
1244 #if CORO_STACKGUARD
1245 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1246 #endif
1247 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1248 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1249 cctx->flags |= CC_MAPPED;
1250 }
1251 else
1252#endif
1253 {
1254 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1255 New (0, cctx->sptr, cctx_stacksize, long);
1256
1257 if (!cctx->sptr)
1258 {
1259 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1260 _exit (EXIT_FAILURE);
1261 }
1262
1263 stack_start = cctx->sptr;
1264 stack_size = cctx->ssize;
1265 }
1266
1267 #if CORO_USE_VALGRIND
1268 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1269 #endif
1270
1271 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1272
1273 return cctx;
1274}
1275
1276static void
1277cctx_destroy (coro_cctx *cctx)
1278{
1279 if (!cctx)
1280 return;
1281
1282 assert (cctx != cctx_current);//D temporary
1283
1284 --cctx_count;
1285 coro_destroy (&cctx->cctx);
1286
1287 /* coro_transfer creates new, empty cctx's */
1288 if (cctx->sptr)
1289 {
1290 #if CORO_USE_VALGRIND
1291 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1292 #endif
1293
1294#if HAVE_MMAP
1295 if (cctx->flags & CC_MAPPED)
1296 munmap (cctx->sptr, cctx->ssize);
1297 else
1298#endif
1299 Safefree (cctx->sptr);
1300 }
1301
1302 Safefree (cctx);
1303}
1304
1305/* wether this cctx should be destructed */
1306#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1307
1308static coro_cctx *
1309cctx_get (pTHX)
1310{
1311 while (expect_true (cctx_first))
1312 {
1313 coro_cctx *cctx = cctx_first;
1314 cctx_first = cctx->next;
1315 --cctx_idle;
1316
1317 if (expect_true (!CCTX_EXPIRED (cctx)))
1318 return cctx;
1319
1320 cctx_destroy (cctx);
1321 }
1322
1323 return cctx_new_run ();
1324}
1325
1326static void
1327cctx_put (coro_cctx *cctx)
1328{
1329 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1330
1331 /* free another cctx if overlimit */
1332 if (expect_false (cctx_idle >= cctx_max_idle))
1333 {
1334 coro_cctx *first = cctx_first;
1335 cctx_first = first->next;
1336 --cctx_idle;
1337
1338 cctx_destroy (first);
1339 }
1340
1341 ++cctx_idle;
1342 cctx->next = cctx_first;
1343 cctx_first = cctx;
1344}
1345
1346/** coroutine switching *****************************************************/
1347
1348static void
1349transfer_check (pTHX_ struct coro *prev, struct coro *next)
1350{
1351 /* TODO: throwing up here is considered harmful */
1352
1353 if (expect_true (prev != next))
1354 {
1355 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1356 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1357
1358 if (expect_false (next->flags & CF_RUNNING))
1359 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1360
1361 if (expect_false (next->flags & CF_DESTROYED))
1362 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1363
1364#if !PERL_VERSION_ATLEAST (5,10,0)
1365 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1366 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1367#endif
1368 }
1369}
1370
1371/* always use the TRANSFER macro */
1372static void NOINLINE /* noinline so we have a fixed stackframe */
1373transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1374{
1375 dSTACKLEVEL;
1376
1377 /* sometimes transfer is only called to set idle_sp */
1378 if (expect_false (!prev))
1379 {
1380 cctx_current->idle_sp = STACKLEVEL;
1381 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1382 }
1383 else if (expect_true (prev != next))
1384 {
1385 coro_cctx *cctx_prev;
1386
1387 if (expect_false (prev->flags & CF_NEW))
1388 {
1389 /* create a new empty/source context */
1390 prev->flags &= ~CF_NEW;
1391 prev->flags |= CF_RUNNING;
1392 }
1393
1394 prev->flags &= ~CF_RUNNING;
1395 next->flags |= CF_RUNNING;
1396
1397 /* first get rid of the old state */
1398 save_perl (aTHX_ prev);
1399
1400 if (expect_false (next->flags & CF_NEW))
1401 {
1402 /* need to start coroutine */
1403 next->flags &= ~CF_NEW;
1404 /* setup coroutine call */
1405 coro_setup (aTHX_ next);
1406 }
1407 else
1408 load_perl (aTHX_ next);
1409
1410 assert (!prev->cctx);//D temporary
1411
1412 /* possibly untie and reuse the cctx */
1413 if (expect_true (
1414 cctx_current->idle_sp == STACKLEVEL
1415 && !(cctx_current->flags & CC_TRACE)
1416 && !force_cctx
1417 ))
1418 {
1419 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1420 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1421
1422 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1423 /* without this the next cctx_get might destroy the running cctx while still in use */
1424 if (expect_false (CCTX_EXPIRED (cctx_current)))
1425 if (expect_true (!next->cctx))
1426 next->cctx = cctx_get (aTHX);
1427
1428 cctx_put (cctx_current);
1429 }
1430 else
1431 prev->cctx = cctx_current;
1432
1433 ++next->usecount;
1434
1435 cctx_prev = cctx_current;
1436 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1437
1438 next->cctx = 0;
1439
1440 if (expect_false (cctx_prev != cctx_current))
1441 {
1442 cctx_prev->top_env = PL_top_env;
1443 PL_top_env = cctx_current->top_env;
1444 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1445 }
1446
1447 transfer_tail (aTHX);
1448 }
1449}
1450
1451#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1452#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1453
1454/** high level stuff ********************************************************/
1455
1456static int
1457coro_state_destroy (pTHX_ struct coro *coro)
1458{
1459 if (coro->flags & CF_DESTROYED)
1460 return 0;
1461
1462 if (coro->on_destroy)
1463 coro->on_destroy (aTHX_ coro);
1464
1465 coro->flags |= CF_DESTROYED;
1466
1467 if (coro->flags & CF_READY)
1468 {
1469 /* reduce nready, as destroying a ready coro effectively unreadies it */
1470 /* alternative: look through all ready queues and remove the coro */
1471 --coro_nready;
1472 }
1473 else
1474 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1475
1476 if (coro->mainstack && coro->mainstack != main_mainstack)
1477 {
1478 struct coro temp;
1479
1480 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1481
1482 save_perl (aTHX_ &temp);
1483 load_perl (aTHX_ coro);
1484
1485 coro_destruct (aTHX_ coro);
1486
1487 load_perl (aTHX_ &temp);
1488
1489 coro->slot = 0;
1490 }
1491
1492 cctx_destroy (coro->cctx);
1493 SvREFCNT_dec (coro->startcv);
1494 SvREFCNT_dec (coro->args);
1495 SvREFCNT_dec (CORO_THROW);
1496
1497 if (coro->next) coro->next->prev = coro->prev;
1498 if (coro->prev) coro->prev->next = coro->next;
1499 if (coro == coro_first) coro_first = coro->next;
1500
1501 return 1;
1502}
1503
1504static int
1505coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1506{
1507 struct coro *coro = (struct coro *)mg->mg_ptr;
1508 mg->mg_ptr = 0;
1509
1510 coro->hv = 0;
1511
1512 if (--coro->refcnt < 0)
1513 {
1514 coro_state_destroy (aTHX_ coro);
1515 Safefree (coro);
1516 }
1517
1518 return 0;
1519}
1520
1521static int
1522coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1523{
1524 struct coro *coro = (struct coro *)mg->mg_ptr;
1525
1526 ++coro->refcnt;
1527
1528 return 0;
1529}
1530
1531static MGVTBL coro_state_vtbl = {
1532 0, 0, 0, 0,
1533 coro_state_free,
1534 0,
1535#ifdef MGf_DUP
1536 coro_state_dup,
1537#else
1538# define MGf_DUP 0
1539#endif
1540};
1541
1542static void
1543prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1544{
1545 ta->prev = SvSTATE (prev_sv);
1546 ta->next = SvSTATE (next_sv);
1547 TRANSFER_CHECK (*ta);
1548}
1549
1550static void
1551api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1552{
1553 struct coro_transfer_args ta;
1554
1555 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1556 TRANSFER (ta, 1);
1557}
1558
1559/*****************************************************************************/
1560/* gensub: simple closure generation utility */
1561
1562#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1563
1564/* create a closure from XS, returns a code reference */
1565/* the arg can be accessed via GENSUB_ARG from the callback */
1566/* the callback must use dXSARGS/XSRETURN */
1567static SV *
1568gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1569{
1570 CV *cv = (CV *)newSV (0);
1571
1572 sv_upgrade ((SV *)cv, SVt_PVCV);
1573
1574 CvANON_on (cv);
1575 CvISXSUB_on (cv);
1576 CvXSUB (cv) = xsub;
1577 GENSUB_ARG = arg;
1578
1579 return newRV_noinc ((SV *)cv);
1580}
1581
1582/** Coro ********************************************************************/
1583
1584INLINE void
1585coro_enq (pTHX_ struct coro *coro)
1586{
1587 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1588}
1589
1590INLINE SV *
1591coro_deq (pTHX)
1592{
1593 int prio;
1594
1595 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1596 if (AvFILLp (coro_ready [prio]) >= 0)
1597 return av_shift (coro_ready [prio]);
1598
1599 return 0;
1600}
1601
1602static int
1603api_ready (pTHX_ SV *coro_sv)
1604{
1605 struct coro *coro;
1606 SV *sv_hook;
1607 void (*xs_hook)(void);
1608
1609 coro = SvSTATE (coro_sv);
1610
1611 if (coro->flags & CF_READY)
1612 return 0;
1613
1614 coro->flags |= CF_READY;
1615
1616 sv_hook = coro_nready ? 0 : coro_readyhook;
1617 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1618
1619 coro_enq (aTHX_ coro);
1620 ++coro_nready;
1621
1622 if (sv_hook)
1623 {
1624 dSP;
1625
1626 ENTER;
1627 SAVETMPS;
1628
1629 PUSHMARK (SP);
1630 PUTBACK;
1631 call_sv (sv_hook, G_VOID | G_DISCARD);
1632
1633 FREETMPS;
1634 LEAVE;
1635 }
1636
1637 if (xs_hook)
1638 xs_hook ();
1639
1640 return 1;
1641}
1642
1643static int
1644api_is_ready (pTHX_ SV *coro_sv)
1645{
1646 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1647}
1648
1649/* expects to own a reference to next->hv */
1650INLINE void
1651prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1652{
1653 SV *prev_sv = SvRV (coro_current);
1654
1655 ta->prev = SvSTATE_hv (prev_sv);
1656 ta->next = next;
1657
1658 TRANSFER_CHECK (*ta);
1659
1660 SvRV_set (coro_current, (SV *)next->hv);
1661
1662 free_coro_mortal (aTHX);
1663 coro_mortal = prev_sv;
1664}
1665
1666static void
914prepare_schedule (aTHX_ struct transfer_args *ta) 1667prepare_schedule (pTHX_ struct coro_transfer_args *ta)
915{ 1668{
916 SV *current, *prev, *next;
917
918 LOCK;
919
920 current = GvSV (coro_current);
921
922 for (;;) 1669 for (;;)
923 { 1670 {
924 LOCK;
925
926 next = coro_deq (aTHX_ PRIO_MIN); 1671 SV *next_sv = coro_deq (aTHX);
927 1672
928 if (next) 1673 if (expect_true (next_sv))
1674 {
1675 struct coro *next = SvSTATE_hv (next_sv);
1676
1677 /* cannot transfer to destroyed coros, skip and look for next */
1678 if (expect_false (next->flags & CF_DESTROYED))
1679 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1680 else
1681 {
1682 next->flags &= ~CF_READY;
1683 --coro_nready;
1684
1685 prepare_schedule_to (aTHX_ ta, next);
929 break; 1686 break;
1687 }
1688 }
1689 else
1690 {
1691 /* nothing to schedule: call the idle handler */
1692 if (SvROK (sv_idle)
1693 && SvOBJECT (SvRV (sv_idle)))
1694 {
1695 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1696 api_ready (aTHX_ SvRV (sv_idle));
1697 --coro_nready;
1698 }
1699 else
1700 {
1701 dSP;
930 1702
931 UNLOCK; 1703 ENTER;
1704 SAVETMPS;
1705
1706 PUSHMARK (SP);
1707 PUTBACK;
1708 call_sv (sv_idle, G_VOID | G_DISCARD);
1709
1710 FREETMPS;
1711 LEAVE;
1712 }
1713 }
1714 }
1715}
1716
1717INLINE void
1718prepare_cede (pTHX_ struct coro_transfer_args *ta)
1719{
1720 api_ready (aTHX_ coro_current);
1721 prepare_schedule (aTHX_ ta);
1722}
1723
1724INLINE void
1725prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1726{
1727 SV *prev = SvRV (coro_current);
1728
1729 if (coro_nready)
1730 {
1731 prepare_schedule (aTHX_ ta);
1732 api_ready (aTHX_ prev);
1733 }
1734 else
1735 prepare_nop (aTHX_ ta);
1736}
1737
1738static void
1739api_schedule (pTHX)
1740{
1741 struct coro_transfer_args ta;
1742
1743 prepare_schedule (aTHX_ &ta);
1744 TRANSFER (ta, 1);
1745}
1746
1747static void
1748api_schedule_to (pTHX_ SV *coro_sv)
1749{
1750 struct coro_transfer_args ta;
1751 struct coro *next = SvSTATE (coro_sv);
1752
1753 SvREFCNT_inc_NN (coro_sv);
1754 prepare_schedule_to (aTHX_ &ta, next);
1755}
1756
1757static int
1758api_cede (pTHX)
1759{
1760 struct coro_transfer_args ta;
1761
1762 prepare_cede (aTHX_ &ta);
1763
1764 if (expect_true (ta.prev != ta.next))
1765 {
1766 TRANSFER (ta, 1);
1767 return 1;
1768 }
1769 else
1770 return 0;
1771}
1772
1773static int
1774api_cede_notself (pTHX)
1775{
1776 if (coro_nready)
1777 {
1778 struct coro_transfer_args ta;
1779
1780 prepare_cede_notself (aTHX_ &ta);
1781 TRANSFER (ta, 1);
1782 return 1;
1783 }
1784 else
1785 return 0;
1786}
1787
1788static void
1789api_trace (pTHX_ SV *coro_sv, int flags)
1790{
1791 struct coro *coro = SvSTATE (coro_sv);
1792
1793 if (coro->flags & CF_RUNNING)
1794 croak ("cannot enable tracing on a running coroutine, caught");
1795
1796 if (flags & CC_TRACE)
1797 {
1798 if (!coro->cctx)
1799 coro->cctx = cctx_new_run ();
1800 else if (!(coro->cctx->flags & CC_TRACE))
1801 croak ("cannot enable tracing on coroutine with custom stack, caught");
1802
1803 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1804 }
1805 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1806 {
1807 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1808
1809 if (coro->flags & CF_RUNNING)
1810 PL_runops = RUNOPS_DEFAULT;
1811 else
1812 coro->slot->runops = RUNOPS_DEFAULT;
1813 }
1814}
1815
1816static void
1817coro_call_on_destroy (pTHX_ struct coro *coro)
1818{
1819 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1820 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1821
1822 if (on_destroyp)
1823 {
1824 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1825
1826 while (AvFILLp (on_destroy) >= 0)
1827 {
1828 dSP; /* don't disturb outer sp */
1829 SV *cb = av_pop (on_destroy);
1830
1831 PUSHMARK (SP);
1832
1833 if (statusp)
1834 {
1835 int i;
1836 AV *status = (AV *)SvRV (*statusp);
1837 EXTEND (SP, AvFILLp (status) + 1);
1838
1839 for (i = 0; i <= AvFILLp (status); ++i)
1840 PUSHs (AvARRAY (status)[i]);
1841 }
1842
1843 PUTBACK;
1844 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1845 }
1846 }
1847}
1848
1849static void
1850slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1851{
1852 int i;
1853 HV *hv = (HV *)SvRV (coro_current);
1854 AV *av = newAV ();
1855
1856 av_extend (av, items - 1);
1857 for (i = 0; i < items; ++i)
1858 av_push (av, SvREFCNT_inc_NN (arg [i]));
1859
1860 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1861
1862 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1863 api_ready (aTHX_ sv_manager);
1864
1865 frame->prepare = prepare_schedule;
1866 frame->check = slf_check_repeat;
1867}
1868
1869/*****************************************************************************/
1870/* async pool handler */
1871
1872static int
1873slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1874{
1875 HV *hv = (HV *)SvRV (coro_current);
1876 struct coro *coro = (struct coro *)frame->data;
1877
1878 if (!coro->invoke_cb)
1879 return 1; /* loop till we have invoke */
1880 else
1881 {
1882 hv_store (hv, "desc", sizeof ("desc") - 1,
1883 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1884
1885 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
932 1886
933 { 1887 {
934 dSP; 1888 dSP;
935 1889 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
936 ENTER;
937 SAVETMPS;
938
939 PUSHMARK (SP);
940 PUTBACK; 1890 PUTBACK;
941 call_sv (GvSV (coro_idle), G_DISCARD);
942
943 FREETMPS;
944 LEAVE;
945 } 1891 }
1892
1893 SvREFCNT_dec (GvAV (PL_defgv));
1894 GvAV (PL_defgv) = coro->invoke_av;
1895 coro->invoke_av = 0;
1896
1897 return 0;
1898 }
1899}
1900
1901static void
1902slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 HV *hv = (HV *)SvRV (coro_current);
1905 struct coro *coro = SvSTATE_hv ((SV *)hv);
1906
1907 if (expect_true (coro->saved_deffh))
946 } 1908 {
1909 /* subsequent iteration */
1910 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1911 coro->saved_deffh = 0;
947 1912
948 prev = SvRV (current); 1913 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
949 SvRV (current) = next; 1914 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1915 {
1916 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1917 coro->invoke_av = newAV ();
950 1918
951 /* free this only after the transfer */ 1919 frame->prepare = prepare_nop;
952 free_coro_mortal (); 1920 }
953 coro_mortal = prev; 1921 else
1922 {
1923 av_clear (GvAV (PL_defgv));
1924 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
954 1925
955 ta->prev = SvSTATE (prev); 1926 coro->prio = 0;
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958 1927
959 UNLOCK; 1928 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
960} 1929 api_trace (aTHX_ coro_current, 0);
961 1930
1931 frame->prepare = prepare_schedule;
1932 av_push (av_async_pool, SvREFCNT_inc (hv));
1933 }
1934 }
1935 else
1936 {
1937 /* first iteration, simply fall through */
1938 frame->prepare = prepare_nop;
1939 }
1940
1941 frame->check = slf_check_pool_handler;
1942 frame->data = (void *)coro;
1943}
1944
1945/*****************************************************************************/
1946/* rouse callback */
1947
1948#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1949
1950static void
1951coro_rouse_callback (pTHX_ CV *cv)
1952{
1953 dXSARGS;
1954 SV *data = (SV *)GENSUB_ARG;
1955
1956 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1957 {
1958 /* first call, set args */
1959 AV *av = newAV ();
1960 SV *coro = SvRV (data);
1961
1962 SvRV_set (data, (SV *)av);
1963 api_ready (aTHX_ coro);
1964 SvREFCNT_dec (coro);
1965
1966 /* better take a full copy of the arguments */
1967 while (items--)
1968 av_store (av, items, newSVsv (ST (items)));
1969 }
1970
1971 XSRETURN_EMPTY;
1972}
1973
962static void 1974static int
1975slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1976{
1977 SV *data = (SV *)frame->data;
1978
1979 if (CORO_THROW)
1980 return 0;
1981
1982 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1983 return 1;
1984
1985 /* now push all results on the stack */
1986 {
1987 dSP;
1988 AV *av = (AV *)SvRV (data);
1989 int i;
1990
1991 EXTEND (SP, AvFILLp (av) + 1);
1992 for (i = 0; i <= AvFILLp (av); ++i)
1993 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1994
1995 /* we have stolen the elements, so ste length to zero and free */
1996 AvFILLp (av) = -1;
1997 av_undef (av);
1998
1999 PUTBACK;
2000 }
2001
2002 return 0;
2003}
2004
2005static void
2006slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2007{
2008 SV *cb;
2009
2010 if (items)
2011 cb = arg [0];
2012 else
2013 {
2014 struct coro *coro = SvSTATE_current;
2015
2016 if (!coro->rouse_cb)
2017 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2018
2019 cb = sv_2mortal (coro->rouse_cb);
2020 coro->rouse_cb = 0;
2021 }
2022
2023 if (!SvROK (cb)
2024 || SvTYPE (SvRV (cb)) != SVt_PVCV
2025 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2026 croak ("Coro::rouse_wait called with illegal callback argument,");
2027
2028 {
2029 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2030 SV *data = (SV *)GENSUB_ARG;
2031
2032 frame->data = (void *)data;
2033 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2034 frame->check = slf_check_rouse_wait;
2035 }
2036}
2037
2038static SV *
2039coro_new_rouse_cb (pTHX)
2040{
2041 HV *hv = (HV *)SvRV (coro_current);
2042 struct coro *coro = SvSTATE_hv (hv);
2043 SV *data = newRV_inc ((SV *)hv);
2044 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2045
2046 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2047 SvREFCNT_dec (data); /* magicext increases the refcount */
2048
2049 SvREFCNT_dec (coro->rouse_cb);
2050 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2051
2052 return cb;
2053}
2054
2055/*****************************************************************************/
2056/* schedule-like-function opcode (SLF) */
2057
2058static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2059static const CV *slf_cv;
2060static SV **slf_argv;
2061static int slf_argc, slf_arga; /* count, allocated */
2062static I32 slf_ax; /* top of stack, for restore */
2063
2064/* this restores the stack in the case we patched the entersub, to */
2065/* recreate the stack frame as perl will on following calls */
2066/* since entersub cleared the stack */
2067static OP *
2068pp_restore (pTHX)
2069{
2070 int i;
2071 SV **SP = PL_stack_base + slf_ax;
2072
2073 PUSHMARK (SP);
2074
2075 EXTEND (SP, slf_argc + 1);
2076
2077 for (i = 0; i < slf_argc; ++i)
2078 PUSHs (sv_2mortal (slf_argv [i]));
2079
2080 PUSHs ((SV *)CvGV (slf_cv));
2081
2082 RETURNOP (slf_restore.op_first);
2083}
2084
2085static void
2086slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2087{
2088 SV **arg = (SV **)slf_frame.data;
2089
2090 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2091}
2092
2093static void
2094slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2095{
2096 if (items != 2)
2097 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2098
2099 frame->prepare = slf_prepare_transfer;
2100 frame->check = slf_check_nop;
2101 frame->data = (void *)arg; /* let's hope it will stay valid */
2102}
2103
2104static void
2105slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 frame->prepare = prepare_schedule;
2108 frame->check = slf_check_nop;
2109}
2110
2111static void
963prepare_cede (aTHX_ struct transfer_args *ta) 2112slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
964{ 2113{
965 LOCK; 2114 struct coro *next = (struct coro *)slf_frame.data;
966 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967 UNLOCK;
968 2115
2116 SvREFCNT_inc_NN (next->hv);
969 prepare_schedule (ta); 2117 prepare_schedule_to (aTHX_ ta, next);
970} 2118}
971 2119
972static void 2120static void
973api_schedule (void) 2121slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
974{ 2122{
975 dTHX; 2123 if (!items)
2124 croak ("Coro::schedule_to expects a coroutine argument, caught");
2125
2126 frame->data = (void *)SvSTATE (arg [0]);
2127 frame->prepare = slf_prepare_schedule_to;
2128 frame->check = slf_check_nop;
2129}
2130
2131static void
2132slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2133{
2134 api_ready (aTHX_ SvRV (coro_current));
2135
2136 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2137}
2138
2139static void
2140slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2141{
2142 frame->prepare = prepare_cede;
2143 frame->check = slf_check_nop;
2144}
2145
2146static void
2147slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2148{
2149 frame->prepare = prepare_cede_notself;
2150 frame->check = slf_check_nop;
2151}
2152
2153/*
2154 * these not obviously related functions are all rolled into one
2155 * function to increase chances that they all will call transfer with the same
2156 * stack offset
2157 * SLF stands for "schedule-like-function".
2158 */
2159static OP *
2160pp_slf (pTHX)
2161{
2162 I32 checkmark; /* mark SP to see how many elements check has pushed */
2163
2164 /* set up the slf frame, unless it has already been set-up */
2165 /* the latter happens when a new coro has been started */
2166 /* or when a new cctx was attached to an existing coroutine */
2167 if (expect_true (!slf_frame.prepare))
2168 {
2169 /* first iteration */
2170 dSP;
2171 SV **arg = PL_stack_base + TOPMARK + 1;
2172 int items = SP - arg; /* args without function object */
2173 SV *gv = *sp;
2174
2175 /* do a quick consistency check on the "function" object, and if it isn't */
2176 /* for us, divert to the real entersub */
2177 if (SvTYPE (gv) != SVt_PVGV
2178 || !GvCV (gv)
2179 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2180 return PL_ppaddr[OP_ENTERSUB](aTHX);
2181
2182 if (!(PL_op->op_flags & OPf_STACKED))
2183 {
2184 /* ampersand-form of call, use @_ instead of stack */
2185 AV *av = GvAV (PL_defgv);
2186 arg = AvARRAY (av);
2187 items = AvFILLp (av) + 1;
2188 }
2189
2190 /* now call the init function, which needs to set up slf_frame */
2191 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2192 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2193
2194 /* pop args */
2195 SP = PL_stack_base + POPMARK;
2196
2197 PUTBACK;
2198 }
2199
2200 /* now that we have a slf_frame, interpret it! */
2201 /* we use a callback system not to make the code needlessly */
2202 /* complicated, but so we can run multiple perl coros from one cctx */
2203
2204 do
2205 {
976 struct transfer_args ta; 2206 struct coro_transfer_args ta;
977 2207
978 prepare_schedule (&ta); 2208 slf_frame.prepare (aTHX_ &ta);
979 TRANSFER (ta); 2209 TRANSFER (ta, 0);
980}
981 2210
2211 checkmark = PL_stack_sp - PL_stack_base;
2212 }
2213 while (slf_frame.check (aTHX_ &slf_frame));
2214
2215 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2216
2217 /* exception handling */
2218 if (expect_false (CORO_THROW))
2219 {
2220 SV *exception = sv_2mortal (CORO_THROW);
2221
2222 CORO_THROW = 0;
2223 sv_setsv (ERRSV, exception);
2224 croak (0);
2225 }
2226
2227 /* return value handling - mostly like entersub */
2228 /* make sure we put something on the stack in scalar context */
2229 if (GIMME_V == G_SCALAR)
2230 {
2231 dSP;
2232 SV **bot = PL_stack_base + checkmark;
2233
2234 if (sp == bot) /* too few, push undef */
2235 bot [1] = &PL_sv_undef;
2236 else if (sp != bot + 1) /* too many, take last one */
2237 bot [1] = *sp;
2238
2239 SP = bot + 1;
2240
2241 PUTBACK;
2242 }
2243
2244 return NORMAL;
2245}
2246
2247static void
2248api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2249{
2250 int i;
2251 SV **arg = PL_stack_base + ax;
2252 int items = PL_stack_sp - arg + 1;
2253
2254 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2255
2256 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2257 && PL_op->op_ppaddr != pp_slf)
2258 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2259
2260 CvFLAGS (cv) |= CVf_SLF;
2261 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2262 slf_cv = cv;
2263
2264 /* we patch the op, and then re-run the whole call */
2265 /* we have to put the same argument on the stack for this to work */
2266 /* and this will be done by pp_restore */
2267 slf_restore.op_next = (OP *)&slf_restore;
2268 slf_restore.op_type = OP_CUSTOM;
2269 slf_restore.op_ppaddr = pp_restore;
2270 slf_restore.op_first = PL_op;
2271
2272 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2273
2274 if (PL_op->op_flags & OPf_STACKED)
2275 {
2276 if (items > slf_arga)
2277 {
2278 slf_arga = items;
2279 free (slf_argv);
2280 slf_argv = malloc (slf_arga * sizeof (SV *));
2281 }
2282
2283 slf_argc = items;
2284
2285 for (i = 0; i < items; ++i)
2286 slf_argv [i] = SvREFCNT_inc (arg [i]);
2287 }
2288 else
2289 slf_argc = 0;
2290
2291 PL_op->op_ppaddr = pp_slf;
2292 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2293
2294 PL_op = (OP *)&slf_restore;
2295}
2296
2297/*****************************************************************************/
2298/* PerlIO::cede */
2299
2300typedef struct
2301{
2302 PerlIOBuf base;
2303 NV next, every;
2304} PerlIOCede;
2305
2306static IV
2307PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2308{
2309 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2310
2311 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2312 self->next = nvtime () + self->every;
2313
2314 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2315}
2316
2317static SV *
2318PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2319{
2320 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2321
2322 return newSVnv (self->every);
2323}
2324
2325static IV
2326PerlIOCede_flush (pTHX_ PerlIO *f)
2327{
2328 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2329 double now = nvtime ();
2330
2331 if (now >= self->next)
2332 {
2333 api_cede (aTHX);
2334 self->next = now + self->every;
2335 }
2336
2337 return PerlIOBuf_flush (aTHX_ f);
2338}
2339
2340static PerlIO_funcs PerlIO_cede =
2341{
2342 sizeof(PerlIO_funcs),
2343 "cede",
2344 sizeof(PerlIOCede),
2345 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2346 PerlIOCede_pushed,
2347 PerlIOBuf_popped,
2348 PerlIOBuf_open,
2349 PerlIOBase_binmode,
2350 PerlIOCede_getarg,
2351 PerlIOBase_fileno,
2352 PerlIOBuf_dup,
2353 PerlIOBuf_read,
2354 PerlIOBuf_unread,
2355 PerlIOBuf_write,
2356 PerlIOBuf_seek,
2357 PerlIOBuf_tell,
2358 PerlIOBuf_close,
2359 PerlIOCede_flush,
2360 PerlIOBuf_fill,
2361 PerlIOBase_eof,
2362 PerlIOBase_error,
2363 PerlIOBase_clearerr,
2364 PerlIOBase_setlinebuf,
2365 PerlIOBuf_get_base,
2366 PerlIOBuf_bufsiz,
2367 PerlIOBuf_get_ptr,
2368 PerlIOBuf_get_cnt,
2369 PerlIOBuf_set_ptrcnt,
2370};
2371
2372/*****************************************************************************/
2373/* Coro::Semaphore & Coro::Signal */
2374
2375static SV *
2376coro_waitarray_new (pTHX_ int count)
2377{
2378 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2379 AV *av = newAV ();
2380 SV **ary;
2381
2382 /* unfortunately, building manually saves memory */
2383 Newx (ary, 2, SV *);
2384 AvALLOC (av) = ary;
2385#if PERL_VERSION_ATLEAST (5,10,0)
2386 AvARRAY (av) = ary;
2387#else
2388 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2389 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2390 SvPVX ((SV *)av) = (char *)ary;
2391#endif
2392 AvMAX (av) = 1;
2393 AvFILLp (av) = 0;
2394 ary [0] = newSViv (count);
2395
2396 return newRV_noinc ((SV *)av);
2397}
2398
2399/* semaphore */
2400
2401static void
2402coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2403{
2404 SV *count_sv = AvARRAY (av)[0];
2405 IV count = SvIVX (count_sv);
2406
2407 count += adjust;
2408 SvIVX (count_sv) = count;
2409
2410 /* now wake up as many waiters as are expected to lock */
2411 while (count > 0 && AvFILLp (av) > 0)
2412 {
2413 SV *cb;
2414
2415 /* swap first two elements so we can shift a waiter */
2416 AvARRAY (av)[0] = AvARRAY (av)[1];
2417 AvARRAY (av)[1] = count_sv;
2418 cb = av_shift (av);
2419
2420 if (SvOBJECT (cb))
2421 {
2422 api_ready (aTHX_ cb);
2423 --count;
2424 }
2425 else if (SvTYPE (cb) == SVt_PVCV)
2426 {
2427 dSP;
2428 PUSHMARK (SP);
2429 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2430 PUTBACK;
2431 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2432 }
2433
2434 SvREFCNT_dec (cb);
2435 }
2436}
2437
2438static void
2439coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2440{
2441 /* call $sem->adjust (0) to possibly wake up some other waiters */
2442 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2443}
2444
982static void 2445static int
983api_cede (void) 2446slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
984{ 2447{
985 dTHX; 2448 AV *av = (AV *)frame->data;
986 struct transfer_args ta; 2449 SV *count_sv = AvARRAY (av)[0];
987 2450
988 prepare_cede (&ta); 2451 /* if we are about to throw, don't actually acquire the lock, just throw */
989 TRANSFER (ta); 2452 if (CORO_THROW)
990} 2453 return 0;
2454 else if (SvIVX (count_sv) > 0)
2455 {
2456 SvSTATE_current->on_destroy = 0;
991 2457
2458 if (acquire)
2459 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2460 else
2461 coro_semaphore_adjust (aTHX_ av, 0);
2462
2463 return 0;
2464 }
2465 else
2466 {
2467 int i;
2468 /* if we were woken up but can't down, we look through the whole */
2469 /* waiters list and only add us if we aren't in there already */
2470 /* this avoids some degenerate memory usage cases */
2471
2472 for (i = 1; i <= AvFILLp (av); ++i)
2473 if (AvARRAY (av)[i] == SvRV (coro_current))
2474 return 1;
2475
2476 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2477 return 1;
2478 }
2479}
2480
2481static int
2482slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2483{
2484 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2485}
2486
2487static int
2488slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2489{
2490 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2491}
2492
2493static void
2494slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2495{
2496 AV *av = (AV *)SvRV (arg [0]);
2497
2498 if (SvIVX (AvARRAY (av)[0]) > 0)
2499 {
2500 frame->data = (void *)av;
2501 frame->prepare = prepare_nop;
2502 }
2503 else
2504 {
2505 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2506
2507 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2508 frame->prepare = prepare_schedule;
2509
2510 /* to avoid race conditions when a woken-up coro gets terminated */
2511 /* we arrange for a temporary on_destroy that calls adjust (0) */
2512 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2513 }
2514}
2515
2516static void
2517slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2518{
2519 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2520 frame->check = slf_check_semaphore_down;
2521}
2522
2523static void
2524slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 if (items >= 2)
2527 {
2528 /* callback form */
2529 AV *av = (AV *)SvRV (arg [0]);
2530 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2531
2532 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2533
2534 if (SvIVX (AvARRAY (av)[0]) > 0)
2535 coro_semaphore_adjust (aTHX_ av, 0);
2536
2537 frame->prepare = prepare_nop;
2538 frame->check = slf_check_nop;
2539 }
2540 else
2541 {
2542 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2543 frame->check = slf_check_semaphore_wait;
2544 }
2545}
2546
2547/* signal */
2548
2549static void
2550coro_signal_wake (pTHX_ AV *av, int count)
2551{
2552 SvIVX (AvARRAY (av)[0]) = 0;
2553
2554 /* now signal count waiters */
2555 while (count > 0 && AvFILLp (av) > 0)
2556 {
2557 SV *cb;
2558
2559 /* swap first two elements so we can shift a waiter */
2560 cb = AvARRAY (av)[0];
2561 AvARRAY (av)[0] = AvARRAY (av)[1];
2562 AvARRAY (av)[1] = cb;
2563
2564 cb = av_shift (av);
2565
2566 api_ready (aTHX_ cb);
2567 sv_setiv (cb, 0); /* signal waiter */
2568 SvREFCNT_dec (cb);
2569
2570 --count;
2571 }
2572}
2573
2574static int
2575slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2576{
2577 /* if we are about to throw, also stop waiting */
2578 return SvROK ((SV *)frame->data) && !CORO_THROW;
2579}
2580
2581static void
2582slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 AV *av = (AV *)SvRV (arg [0]);
2585
2586 if (SvIVX (AvARRAY (av)[0]))
2587 {
2588 SvIVX (AvARRAY (av)[0]) = 0;
2589 frame->prepare = prepare_nop;
2590 frame->check = slf_check_nop;
2591 }
2592 else
2593 {
2594 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2595
2596 av_push (av, waiter);
2597
2598 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2599 frame->prepare = prepare_schedule;
2600 frame->check = slf_check_signal_wait;
2601 }
2602}
2603
2604/*****************************************************************************/
2605/* Coro::AIO */
2606
2607#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2608
2609/* helper storage struct */
2610struct io_state
2611{
2612 int errorno;
2613 I32 laststype; /* U16 in 5.10.0 */
2614 int laststatval;
2615 Stat_t statcache;
2616};
2617
2618static void
2619coro_aio_callback (pTHX_ CV *cv)
2620{
2621 dXSARGS;
2622 AV *state = (AV *)GENSUB_ARG;
2623 SV *coro = av_pop (state);
2624 SV *data_sv = newSV (sizeof (struct io_state));
2625
2626 av_extend (state, items - 1);
2627
2628 sv_upgrade (data_sv, SVt_PV);
2629 SvCUR_set (data_sv, sizeof (struct io_state));
2630 SvPOK_only (data_sv);
2631
2632 {
2633 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2634
2635 data->errorno = errno;
2636 data->laststype = PL_laststype;
2637 data->laststatval = PL_laststatval;
2638 data->statcache = PL_statcache;
2639 }
2640
2641 /* now build the result vector out of all the parameters and the data_sv */
2642 {
2643 int i;
2644
2645 for (i = 0; i < items; ++i)
2646 av_push (state, SvREFCNT_inc_NN (ST (i)));
2647 }
2648
2649 av_push (state, data_sv);
2650
2651 api_ready (aTHX_ coro);
2652 SvREFCNT_dec (coro);
2653 SvREFCNT_dec ((AV *)state);
2654}
2655
2656static int
2657slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2658{
2659 AV *state = (AV *)frame->data;
2660
2661 /* if we are about to throw, return early */
2662 /* this does not cancel the aio request, but at least */
2663 /* it quickly returns */
2664 if (CORO_THROW)
2665 return 0;
2666
2667 /* one element that is an RV? repeat! */
2668 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2669 return 1;
2670
2671 /* restore status */
2672 {
2673 SV *data_sv = av_pop (state);
2674 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2675
2676 errno = data->errorno;
2677 PL_laststype = data->laststype;
2678 PL_laststatval = data->laststatval;
2679 PL_statcache = data->statcache;
2680
2681 SvREFCNT_dec (data_sv);
2682 }
2683
2684 /* push result values */
2685 {
2686 dSP;
2687 int i;
2688
2689 EXTEND (SP, AvFILLp (state) + 1);
2690 for (i = 0; i <= AvFILLp (state); ++i)
2691 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2692
2693 PUTBACK;
2694 }
2695
2696 return 0;
2697}
2698
2699static void
2700slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2701{
2702 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2703 SV *coro_hv = SvRV (coro_current);
2704 struct coro *coro = SvSTATE_hv (coro_hv);
2705
2706 /* put our coroutine id on the state arg */
2707 av_push (state, SvREFCNT_inc_NN (coro_hv));
2708
2709 /* first see whether we have a non-zero priority and set it as AIO prio */
2710 if (coro->prio)
2711 {
2712 dSP;
2713
2714 static SV *prio_cv;
2715 static SV *prio_sv;
2716
2717 if (expect_false (!prio_cv))
2718 {
2719 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2720 prio_sv = newSViv (0);
2721 }
2722
2723 PUSHMARK (SP);
2724 sv_setiv (prio_sv, coro->prio);
2725 XPUSHs (prio_sv);
2726
2727 PUTBACK;
2728 call_sv (prio_cv, G_VOID | G_DISCARD);
2729 }
2730
2731 /* now call the original request */
2732 {
2733 dSP;
2734 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2735 int i;
2736
2737 PUSHMARK (SP);
2738
2739 /* first push all args to the stack */
2740 EXTEND (SP, items + 1);
2741
2742 for (i = 0; i < items; ++i)
2743 PUSHs (arg [i]);
2744
2745 /* now push the callback closure */
2746 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2747
2748 /* now call the AIO function - we assume our request is uncancelable */
2749 PUTBACK;
2750 call_sv ((SV *)req, G_VOID | G_DISCARD);
2751 }
2752
2753 /* now that the requets is going, we loop toll we have a result */
2754 frame->data = (void *)state;
2755 frame->prepare = prepare_schedule;
2756 frame->check = slf_check_aio_req;
2757}
2758
2759static void
2760coro_aio_req_xs (pTHX_ CV *cv)
2761{
2762 dXSARGS;
2763
2764 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2765
2766 XSRETURN_EMPTY;
2767}
2768
2769/*****************************************************************************/
2770
2771#if CORO_CLONE
2772# include "clone.c"
2773#endif
2774
992MODULE = Coro::State PACKAGE = Coro::State 2775MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993 2776
994PROTOTYPES: DISABLE 2777PROTOTYPES: DISABLE
995 2778
996BOOT: 2779BOOT:
997{ 2780{
998#ifdef USE_ITHREADS 2781#ifdef USE_ITHREADS
999 MUTEX_INIT (&coro_mutex); 2782# if CORO_PTHREAD
2783 coro_thx = PERL_GET_CONTEXT;
2784# endif
1000#endif 2785#endif
1001 BOOT_PAGESIZE; 2786 BOOT_PAGESIZE;
1002 2787
2788 cctx_current = cctx_new_empty ();
2789
2790 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2791 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2792
2793 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2794 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2795 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2796
2797 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2798 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2799 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2800
1003 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2801 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004 2802
1005 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2803 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1006 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2804 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1007 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2805 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2806 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1008 2807
1009 main_mainstack = PL_mainstack; 2808 main_mainstack = PL_mainstack;
2809 main_top_env = PL_top_env;
1010 2810
2811 while (main_top_env->je_prev)
2812 main_top_env = main_top_env->je_prev;
2813
2814 {
2815 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2816
2817 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2818 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2819
2820 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2821 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2822 }
2823
1011 coroapi.ver = CORO_API_VERSION; 2824 coroapi.ver = CORO_API_VERSION;
2825 coroapi.rev = CORO_API_REVISION;
2826
1012 coroapi.transfer = api_transfer; 2827 coroapi.transfer = api_transfer;
2828
2829 coroapi.sv_state = SvSTATE_;
2830 coroapi.execute_slf = api_execute_slf;
2831 coroapi.prepare_nop = prepare_nop;
2832 coroapi.prepare_schedule = prepare_schedule;
2833 coroapi.prepare_cede = prepare_cede;
2834 coroapi.prepare_cede_notself = prepare_cede_notself;
2835
2836 {
2837 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2838
2839 if (!svp) croak ("Time::HiRes is required");
2840 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2841
2842 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2843 }
1013 2844
1014 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2845 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1015} 2846}
1016 2847
1017SV * 2848SV *
1018new (char *klass, ...) 2849new (char *klass, ...)
2850 ALIAS:
2851 Coro::new = 1
1019 CODE: 2852 CODE:
1020{ 2853{
1021 struct coro *coro; 2854 struct coro *coro;
2855 MAGIC *mg;
1022 HV *hv; 2856 HV *hv;
2857 CV *cb;
1023 int i; 2858 int i;
1024 2859
2860 if (items > 1)
2861 {
2862 cb = coro_sv_2cv (aTHX_ ST (1));
2863
2864 if (!ix)
2865 {
2866 if (CvISXSUB (cb))
2867 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2868
2869 if (!CvROOT (cb))
2870 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2871 }
2872 }
2873
1025 Newz (0, coro, 1, struct coro); 2874 Newz (0, coro, 1, struct coro);
1026 coro->args = newAV (); 2875 coro->args = newAV ();
2876 coro->flags = CF_NEW;
1027 2877
2878 if (coro_first) coro_first->prev = coro;
2879 coro->next = coro_first;
2880 coro_first = coro;
2881
1028 hv = newHV (); 2882 coro->hv = hv = newHV ();
1029 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2883 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2884 mg->mg_flags |= MGf_DUP;
1030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2885 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031 2886
2887 if (items > 1)
2888 {
2889 av_extend (coro->args, items - 1 + ix - 1);
2890
2891 if (ix)
2892 {
2893 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2894 cb = cv_coro_run;
2895 }
2896
2897 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2898
1032 for (i = 1; i < items; i++) 2899 for (i = 2; i < items; i++)
1033 av_push (coro->args, newSVsv (ST (i))); 2900 av_push (coro->args, newSVsv (ST (i)));
1034 2901 }
1035 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1036 /*coro->stack = 0;*/
1037} 2902}
1038 OUTPUT: 2903 OUTPUT:
1039 RETVAL 2904 RETVAL
1040 2905
1041void 2906void
1042_set_stacklevel (...) 2907transfer (...)
1043 ALIAS: 2908 PROTOTYPE: $$
1044 Coro::State::transfer = 1 2909 CODE:
1045 Coro::schedule = 2 2910 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1046 Coro::cede = 3
1047 Coro::Cont::yield = 4
1048 CODE:
1049{
1050 struct transfer_args ta;
1051 2911
1052 switch (ix) 2912bool
1053 { 2913_destroy (SV *coro_sv)
1054 case 0: 2914 CODE:
1055 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 2915 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1056 ta.next = 0; 2916 OUTPUT:
1057 ta.flags = TRANSFER_SET_STACKLEVEL; 2917 RETVAL
1058 break;
1059
1060 case 1:
1061 if (items != 3)
1062 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1063
1064 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1065 break;
1066
1067 case 2:
1068 prepare_schedule (&ta);
1069 break;
1070
1071 case 3:
1072 prepare_cede (&ta);
1073 break;
1074
1075 case 4:
1076 {
1077 SV *yieldstack;
1078 SV *sv;
1079 AV *defav = GvAV (PL_defgv);
1080
1081 yieldstack = *hv_fetch (
1082 (HV *)SvRV (GvSV (coro_current)),
1083 "yieldstack", sizeof ("yieldstack") - 1,
1084 0
1085 );
1086
1087 /* set up @_ -- ugly */
1088 av_clear (defav);
1089 av_fill (defav, items - 1);
1090 while (items--)
1091 av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093 sv = av_pop ((AV *)SvRV (yieldstack));
1094 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096 ta.flags = 0;
1097 SvREFCNT_dec (sv);
1098 }
1099 break;
1100
1101 }
1102
1103 TRANSFER (ta);
1104}
1105 2918
1106void 2919void
1107_clone_state_from (SV *dst, SV *src)
1108 CODE:
1109{
1110 struct coro *coro_src = SvSTATE (src);
1111
1112 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114 ++coro_src->refcnt;
1115 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116}
1117
1118void
1119_nonlocal_goto (IV nextop)
1120 CODE:
1121 /* uuh, somebody will kill me again for this */
1122 PL_op->op_next = INT2PTR (OP *, nextop);
1123
1124void
1125_exit (code) 2920_exit (int code)
1126 int code
1127 PROTOTYPE: $ 2921 PROTOTYPE: $
1128 CODE: 2922 CODE:
1129 _exit (code); 2923 _exit (code);
1130 2924
2925SV *
2926clone (Coro::State coro)
2927 CODE:
2928{
2929#if CORO_CLONE
2930 struct coro *ncoro = coro_clone (aTHX_ coro);
2931 MAGIC *mg;
2932 /* TODO: too much duplication */
2933 ncoro->hv = newHV ();
2934 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2935 mg->mg_flags |= MGf_DUP;
2936 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2937#else
2938 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2939#endif
2940}
2941 OUTPUT:
2942 RETVAL
2943
2944int
2945cctx_stacksize (int new_stacksize = 0)
2946 PROTOTYPE: ;$
2947 CODE:
2948 RETVAL = cctx_stacksize;
2949 if (new_stacksize)
2950 {
2951 cctx_stacksize = new_stacksize;
2952 ++cctx_gen;
2953 }
2954 OUTPUT:
2955 RETVAL
2956
2957int
2958cctx_max_idle (int max_idle = 0)
2959 PROTOTYPE: ;$
2960 CODE:
2961 RETVAL = cctx_max_idle;
2962 if (max_idle > 1)
2963 cctx_max_idle = max_idle;
2964 OUTPUT:
2965 RETVAL
2966
2967int
2968cctx_count ()
2969 PROTOTYPE:
2970 CODE:
2971 RETVAL = cctx_count;
2972 OUTPUT:
2973 RETVAL
2974
2975int
2976cctx_idle ()
2977 PROTOTYPE:
2978 CODE:
2979 RETVAL = cctx_idle;
2980 OUTPUT:
2981 RETVAL
2982
2983void
2984list ()
2985 PROTOTYPE:
2986 PPCODE:
2987{
2988 struct coro *coro;
2989 for (coro = coro_first; coro; coro = coro->next)
2990 if (coro->hv)
2991 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2992}
2993
2994void
2995call (Coro::State coro, SV *coderef)
2996 ALIAS:
2997 eval = 1
2998 CODE:
2999{
3000 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3001 {
3002 struct coro temp;
3003
3004 if (!(coro->flags & CF_RUNNING))
3005 {
3006 PUTBACK;
3007 save_perl (aTHX_ &temp);
3008 load_perl (aTHX_ coro);
3009 }
3010
3011 {
3012 dSP;
3013 ENTER;
3014 SAVETMPS;
3015 PUTBACK;
3016 PUSHSTACK;
3017 PUSHMARK (SP);
3018
3019 if (ix)
3020 eval_sv (coderef, 0);
3021 else
3022 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3023
3024 POPSTACK;
3025 SPAGAIN;
3026 FREETMPS;
3027 LEAVE;
3028 PUTBACK;
3029 }
3030
3031 if (!(coro->flags & CF_RUNNING))
3032 {
3033 save_perl (aTHX_ coro);
3034 load_perl (aTHX_ &temp);
3035 SPAGAIN;
3036 }
3037 }
3038}
3039
3040SV *
3041is_ready (Coro::State coro)
3042 PROTOTYPE: $
3043 ALIAS:
3044 is_ready = CF_READY
3045 is_running = CF_RUNNING
3046 is_new = CF_NEW
3047 is_destroyed = CF_DESTROYED
3048 CODE:
3049 RETVAL = boolSV (coro->flags & ix);
3050 OUTPUT:
3051 RETVAL
3052
3053void
3054throw (Coro::State self, SV *throw = &PL_sv_undef)
3055 PROTOTYPE: $;$
3056 CODE:
3057{
3058 struct coro *current = SvSTATE_current;
3059 SV **throwp = self == current ? &CORO_THROW : &self->except;
3060 SvREFCNT_dec (*throwp);
3061 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3062}
3063
3064void
3065api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3066 PROTOTYPE: $;$
3067 C_ARGS: aTHX_ coro, flags
3068
3069SV *
3070has_cctx (Coro::State coro)
3071 PROTOTYPE: $
3072 CODE:
3073 /* maybe manage the running flag differently */
3074 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3075 OUTPUT:
3076 RETVAL
3077
3078int
3079is_traced (Coro::State coro)
3080 PROTOTYPE: $
3081 CODE:
3082 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3083 OUTPUT:
3084 RETVAL
3085
3086UV
3087rss (Coro::State coro)
3088 PROTOTYPE: $
3089 ALIAS:
3090 usecount = 1
3091 CODE:
3092 switch (ix)
3093 {
3094 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3095 case 1: RETVAL = coro->usecount; break;
3096 }
3097 OUTPUT:
3098 RETVAL
3099
3100void
3101force_cctx ()
3102 PROTOTYPE:
3103 CODE:
3104 cctx_current->idle_sp = 0;
3105
3106void
3107swap_defsv (Coro::State self)
3108 PROTOTYPE: $
3109 ALIAS:
3110 swap_defav = 1
3111 CODE:
3112 if (!self->slot)
3113 croak ("cannot swap state with coroutine that has no saved state,");
3114 else
3115 {
3116 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3117 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3118
3119 SV *tmp = *src; *src = *dst; *dst = tmp;
3120 }
3121
3122
1131MODULE = Coro::State PACKAGE = Coro 3123MODULE = Coro::State PACKAGE = Coro
1132 3124
1133BOOT: 3125BOOT:
1134{ 3126{
1135 int i; 3127 int i;
1136 3128
3129 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3130 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3131 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3132 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3133 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3134 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3135 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3136 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3137 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3138
3139 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3140 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3141 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3142 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3143
1137 coro_stash = gv_stashpv ("Coro", TRUE); 3144 coro_stash = gv_stashpv ("Coro", TRUE);
1138 3145
1139 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3146 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1140 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3147 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1141 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3148 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3149 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3150 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3151 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145 3152
1146 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3153 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150 coro_ready[i] = newAV (); 3154 coro_ready[i] = newAV ();
1151 3155
1152 { 3156 {
1153 SV *sv = perl_get_sv("Coro::API", 1); 3157 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1154 3158
1155 coroapi.schedule = api_schedule; 3159 coroapi.schedule = api_schedule;
3160 coroapi.schedule_to = api_schedule_to;
1156 coroapi.cede = api_cede; 3161 coroapi.cede = api_cede;
3162 coroapi.cede_notself = api_cede_notself;
1157 coroapi.ready = api_ready; 3163 coroapi.ready = api_ready;
3164 coroapi.is_ready = api_is_ready;
1158 coroapi.nready = &coro_nready; 3165 coroapi.nready = coro_nready;
1159 coroapi.current = coro_current; 3166 coroapi.current = coro_current;
1160 3167
1161 GCoroAPI = &coroapi; 3168 /*GCoroAPI = &coroapi;*/
1162 sv_setiv (sv, (IV)&coroapi); 3169 sv_setiv (sv, (IV)&coroapi);
1163 SvREADONLY_on (sv); 3170 SvREADONLY_on (sv);
1164 } 3171 }
1165} 3172}
1166 3173
3174void
3175terminate (...)
3176 CODE:
3177 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3178
3179void
3180schedule (...)
3181 CODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3183
3184void
3185schedule_to (...)
3186 CODE:
3187 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3188
3189void
3190cede_to (...)
3191 CODE:
3192 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3193
3194void
3195cede (...)
3196 CODE:
3197 CORO_EXECUTE_SLF_XS (slf_init_cede);
3198
3199void
3200cede_notself (...)
3201 CODE:
3202 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3203
3204void
3205_cancel (Coro::State self)
3206 CODE:
3207 coro_state_destroy (aTHX_ self);
3208 coro_call_on_destroy (aTHX_ self);
3209
3210void
3211_set_current (SV *current)
3212 PROTOTYPE: $
3213 CODE:
3214 SvREFCNT_dec (SvRV (coro_current));
3215 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3216
3217void
3218_set_readyhook (SV *hook)
3219 PROTOTYPE: $
3220 CODE:
3221 SvREFCNT_dec (coro_readyhook);
3222 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3223
1167int 3224int
1168prio (Coro::State coro, int newprio = 0) 3225prio (Coro::State coro, int newprio = 0)
3226 PROTOTYPE: $;$
1169 ALIAS: 3227 ALIAS:
1170 nice = 1 3228 nice = 1
1171 CODE: 3229 CODE:
1172{ 3230{
1173 RETVAL = coro->prio; 3231 RETVAL = coro->prio;
1174 3232
1175 if (items > 1) 3233 if (items > 1)
1176 { 3234 {
1177 if (ix) 3235 if (ix)
1178 newprio += coro->prio; 3236 newprio = coro->prio - newprio;
1179 3237
1180 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3238 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3239 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182 3240
1183 coro->prio = newprio; 3241 coro->prio = newprio;
1184 } 3242 }
1185} 3243}
3244 OUTPUT:
3245 RETVAL
1186 3246
1187void 3247SV *
1188ready (SV *self) 3248ready (SV *self)
1189 PROTOTYPE: $ 3249 PROTOTYPE: $
1190 CODE: 3250 CODE:
1191 api_ready (self); 3251 RETVAL = boolSV (api_ready (aTHX_ self));
3252 OUTPUT:
3253 RETVAL
1192 3254
1193int 3255int
1194nready (...) 3256nready (...)
1195 PROTOTYPE: 3257 PROTOTYPE:
1196 CODE: 3258 CODE:
1197 RETVAL = coro_nready; 3259 RETVAL = coro_nready;
1198 OUTPUT: 3260 OUTPUT:
1199 RETVAL 3261 RETVAL
1200 3262
1201MODULE = Coro::State PACKAGE = Coro::AIO 3263void
3264_pool_handler (...)
3265 CODE:
3266 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3267
3268void
3269async_pool (SV *cv, ...)
3270 PROTOTYPE: &@
3271 PPCODE:
3272{
3273 HV *hv = (HV *)av_pop (av_async_pool);
3274 AV *av = newAV ();
3275 SV *cb = ST (0);
3276 int i;
3277
3278 av_extend (av, items - 2);
3279 for (i = 1; i < items; ++i)
3280 av_push (av, SvREFCNT_inc_NN (ST (i)));
3281
3282 if ((SV *)hv == &PL_sv_undef)
3283 {
3284 PUSHMARK (SP);
3285 EXTEND (SP, 2);
3286 PUSHs (sv_Coro);
3287 PUSHs ((SV *)cv_pool_handler);
3288 PUTBACK;
3289 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3290 SPAGAIN;
3291
3292 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3293 }
3294
3295 {
3296 struct coro *coro = SvSTATE_hv (hv);
3297
3298 assert (!coro->invoke_cb);
3299 assert (!coro->invoke_av);
3300 coro->invoke_cb = SvREFCNT_inc (cb);
3301 coro->invoke_av = av;
3302 }
3303
3304 api_ready (aTHX_ (SV *)hv);
3305
3306 if (GIMME_V != G_VOID)
3307 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3308 else
3309 SvREFCNT_dec (hv);
3310}
1202 3311
1203SV * 3312SV *
1204_get_state () 3313rouse_cb ()
3314 PROTOTYPE:
1205 CODE: 3315 CODE:
1206{ 3316 RETVAL = coro_new_rouse_cb (aTHX);
1207 struct {
1208 int errorno;
1209 int laststype;
1210 int laststatval;
1211 Stat_t statcache;
1212 } data;
1213
1214 data.errorno = errno;
1215 data.laststype = PL_laststype;
1216 data.laststatval = PL_laststatval;
1217 data.statcache = PL_statcache;
1218
1219 RETVAL = newSVpvn ((char *)&data, sizeof data);
1220}
1221 OUTPUT: 3317 OUTPUT:
1222 RETVAL 3318 RETVAL
1223 3319
1224void 3320void
1225_set_state (char *data_) 3321rouse_wait (...)
1226 PROTOTYPE: $ 3322 PROTOTYPE: ;$
3323 PPCODE:
3324 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3325
3326
3327MODULE = Coro::State PACKAGE = PerlIO::cede
3328
3329BOOT:
3330 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3331
3332
3333MODULE = Coro::State PACKAGE = Coro::Semaphore
3334
3335SV *
3336new (SV *klass, SV *count = 0)
1227 CODE: 3337 CODE:
3338 RETVAL = sv_bless (
3339 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3340 GvSTASH (CvGV (cv))
3341 );
3342 OUTPUT:
3343 RETVAL
3344
3345# helper for Coro::Channel
3346SV *
3347_alloc (int count)
3348 CODE:
3349 RETVAL = coro_waitarray_new (aTHX_ count);
3350 OUTPUT:
3351 RETVAL
3352
3353SV *
3354count (SV *self)
3355 CODE:
3356 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3357 OUTPUT:
3358 RETVAL
3359
3360void
3361up (SV *self, int adjust = 1)
3362 ALIAS:
3363 adjust = 1
3364 CODE:
3365 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3366
3367void
3368down (...)
3369 CODE:
3370 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3371
3372void
3373wait (...)
3374 CODE:
3375 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3376
3377void
3378try (SV *self)
3379 PPCODE:
1228{ 3380{
1229 struct { 3381 AV *av = (AV *)SvRV (self);
3382 SV *count_sv = AvARRAY (av)[0];
3383 IV count = SvIVX (count_sv);
3384
3385 if (count > 0)
3386 {
3387 --count;
3388 SvIVX (count_sv) = count;
3389 XSRETURN_YES;
3390 }
3391 else
3392 XSRETURN_NO;
3393}
3394
3395void
3396waiters (SV *self)
3397 PPCODE:
3398{
3399 AV *av = (AV *)SvRV (self);
3400 int wcount = AvFILLp (av) + 1 - 1;
3401
3402 if (GIMME_V == G_SCALAR)
3403 XPUSHs (sv_2mortal (newSViv (wcount)));
3404 else
3405 {
1230 int errorno; 3406 int i;
1231 int laststype; 3407 EXTEND (SP, wcount);
1232 int laststatval; 3408 for (i = 1; i <= wcount; ++i)
1233 Stat_t statcache; 3409 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1234 } *data = (void *)data_; 3410 }
1235
1236 errno = data->errorno;
1237 PL_laststype = data->laststype;
1238 PL_laststatval = data->laststatval;
1239 PL_statcache = data->statcache;
1240} 3411}
3412
3413MODULE = Coro::State PACKAGE = Coro::Signal
3414
3415SV *
3416new (SV *klass)
3417 CODE:
3418 RETVAL = sv_bless (
3419 coro_waitarray_new (aTHX_ 0),
3420 GvSTASH (CvGV (cv))
3421 );
3422 OUTPUT:
3423 RETVAL
3424
3425void
3426wait (...)
3427 CODE:
3428 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3429
3430void
3431broadcast (SV *self)
3432 CODE:
3433{
3434 AV *av = (AV *)SvRV (self);
3435 coro_signal_wake (aTHX_ av, AvFILLp (av));
3436}
3437
3438void
3439send (SV *self)
3440 CODE:
3441{
3442 AV *av = (AV *)SvRV (self);
3443
3444 if (AvFILLp (av))
3445 coro_signal_wake (aTHX_ av, 1);
3446 else
3447 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3448}
3449
3450IV
3451awaited (SV *self)
3452 CODE:
3453 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3454 OUTPUT:
3455 RETVAL
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::AnyEvent
3459
3460BOOT:
3461 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3462
3463void
3464_schedule (...)
3465 CODE:
3466{
3467 static int incede;
3468
3469 api_cede_notself (aTHX);
3470
3471 ++incede;
3472 while (coro_nready >= incede && api_cede (aTHX))
3473 ;
3474
3475 sv_setsv (sv_activity, &PL_sv_undef);
3476 if (coro_nready >= incede)
3477 {
3478 PUSHMARK (SP);
3479 PUTBACK;
3480 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3481 }
3482
3483 --incede;
3484}
3485
3486
3487MODULE = Coro::State PACKAGE = Coro::AIO
3488
3489void
3490_register (char *target, char *proto, SV *req)
3491 CODE:
3492{
3493 CV *req_cv = coro_sv_2cv (aTHX_ req);
3494 /* newXSproto doesn't return the CV on 5.8 */
3495 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3496 sv_setpv ((SV *)slf_cv, proto);
3497 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3498}
3499

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