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Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.340 by root, Mon Dec 15 00:30:40 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "patchlevel.h" 11#include "patchlevel.h"
6 12
7#if PATCHLEVEL < 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)
8# ifndef PL_ppaddr 63# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
10# endif 65# endif
11# ifndef call_sv 66# ifndef call_sv
12# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 78# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
25# endif 80# endif
26#endif 81#endif
27 82
28#include "libcoro/coro.c" 83/* 5.11 */
29 84#ifndef CxHASARGS
30#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# endif 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
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
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;
41# endif 161# endif
42#endif 162#endif
43 163
44#define MAY_FLUSH /* increases codesize and is rarely used */ 164static double (*nvtime)(); /* so why doesn't it take void? */
45 165
46#define SUB_INIT "Coro::State::initialize" 166/* we hijack an hopefully unused CV flag for our purposes */
47#define UCORO_STATE "_coro_state" 167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
48 169
49/* The next macro should declare a variable stacklevel that contains and approximation 170static U32 cctx_gen;
50 * to the current C stack pointer. Its property is that it changes with each call 171static size_t cctx_stacksize = CORO_STACKSIZE;
51 * and should be unique. */
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53
54#define IN_DESTRUCT (PL_main_cv == Nullcv)
55
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
175static HV *coro_state_stash, *coro_stash;
176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
61 177
62/* this is actually not only the c stack but also c registers etc... */ 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};
211
212/* this is a structure representing a c-level coroutine */
63typedef struct { 213typedef struct coro_cctx
64 int refcnt; /* pointer reference counter */ 214{
65 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
66 int gencnt; /* generation counter */
67 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
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 */
224 JMPENV *top_env;
68 coro_context cctx; 225 coro_context cctx;
69 226
70 void *sptr; 227 U32 gen;
71 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
72} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
73 233
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))
259
260/* this is a structure representing a perl-level coroutine */
74struct coro { 261struct coro {
75 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 262 /* the C coroutine allocated to this perl coroutine, if any */
76 JMPENV start_env; 263 coro_cctx *cctx;
77 264
78 /* the optional C context */ 265 /* state data */
79 coro_stack *stack; 266 struct CoroSLF slf_frame; /* saved slf frame */
80 void *cursp;
81 int gencnt;
82
83 /* optionally saved, might be zero */
84 AV *defav;
85 SV *defsv;
86 SV *errsv;
87
88 /* saved global state not related to stacks */
89 U8 dowarn;
90 I32 in_eval;
91
92 /* the stacks and related info (callchain etc..) */
93 PERL_SI *curstackinfo;
94 AV *curstack;
95 AV *mainstack; 267 AV *mainstack;
96 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
97 OP *op;
98 SV **curpad;
99 AV *comppad;
100 SV **stack_base;
101 SV **stack_max;
102 SV **tmps_stack;
103 I32 tmps_floor;
104 I32 tmps_ix;
105 I32 tmps_max;
106 I32 *markstack;
107 I32 *markstack_ptr;
108 I32 *markstack_max;
109 I32 *scopestack;
110 I32 scopestack_ix;
111 I32 scopestack_max;
112 ANY *savestack;
113 I32 savestack_ix;
114 I32 savestack_max;
115 OP **retstack;
116 I32 retstack_ix;
117 I32 retstack_max;
118 COP *curcop;
119 JMPENV *top_env;
120 269
270 CV *startcv; /* the CV to execute */
121 /* data associated with this coroutine (initial args) */ 271 AV *args; /* data associated with this coroutine (initial args) */
122 AV *args; 272 int refcnt; /* coroutines are refcounted, yes */
273 int flags; /* CF_ flags */
274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
279
280 /* coro process data */
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 /* on_enter/on_leave */
291 AV *on_enter;
292 AV *on_leave;
293
294 /* linked list */
295 struct coro *next, *prev;
123}; 296};
124 297
125typedef struct coro *Coro__State; 298typedef struct coro *Coro__State;
126typedef struct coro *Coro__State_or_hashref; 299typedef struct coro *Coro__State_or_hashref;
127 300
128static AV *main_mainstack; /* used to differentiate between $main and others */ 301/* the following variables are effectively part of the perl context */
129static HV *coro_state_stash; 302/* and get copied between struct coro and these variables */
130static SV *ucoro_state_sv; 303/* the mainr easonw e don't support windows process emulation */
131static U32 ucoro_state_hash; 304static struct CoroSLF slf_frame; /* the current slf frame */
132static HV *padlist_cache;
133static SV *coro_mortal; /* will be freed after next transfer */
134
135/* mostly copied from op.c:cv_clone2 */
136STATIC AV *
137clone_padlist (AV *protopadlist)
138{
139 AV *av;
140 I32 ix;
141 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143 SV **pname = AvARRAY (protopad_name);
144 SV **ppad = AvARRAY (protopad);
145 I32 fname = AvFILLp (protopad_name);
146 I32 fpad = AvFILLp (protopad);
147 AV *newpadlist, *newpad_name, *newpad;
148 SV **npad;
149
150 newpad_name = newAV ();
151 for (ix = fname; ix >= 0; ix--)
152 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154 newpad = newAV ();
155 av_fill (newpad, AvFILLp (protopad));
156 npad = AvARRAY (newpad);
157
158 newpadlist = newAV ();
159 AvREAL_off (newpadlist);
160 av_store (newpadlist, 0, (SV *) newpad_name);
161 av_store (newpadlist, 1, (SV *) newpad);
162
163 av = newAV (); /* will be @_ */
164 av_extend (av, 0);
165 av_store (newpad, 0, (SV *) av);
166 AvFLAGS (av) = AVf_REIFY;
167
168 for (ix = fpad; ix > 0; ix--)
169 {
170 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
171 if (namesv && namesv != &PL_sv_undef)
172 {
173 char *name = SvPVX (namesv); /* XXX */
174 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
175 { /* lexical from outside? */
176 npad[ix] = SvREFCNT_inc (ppad[ix]);
177 }
178 else
179 { /* our own lexical */
180 SV *sv;
181 if (*name == '&')
182 sv = SvREFCNT_inc (ppad[ix]);
183 else if (*name == '@')
184 sv = (SV *) newAV ();
185 else if (*name == '%')
186 sv = (SV *) newHV ();
187 else
188 sv = NEWSV (0, 0);
189 if (!SvPADBUSY (sv))
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 }
193 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205
206#if 0 /* return -ENOTUNDERSTOOD */
207 /* Now that vars are all in place, clone nested closures. */
208
209 for (ix = fpad; ix > 0; ix--) {
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211 if (namesv
212 && namesv != &PL_sv_undef
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225
226 return newpadlist;
227}
228
229#ifdef MAY_FLUSH
230STATIC void
231free_padlist (AV *padlist)
232{
233 /* may be during global destruction */
234 if (SvREFCNT(padlist))
235 {
236 I32 i = AvFILLp(padlist);
237 while (i >= 0)
238 {
239 SV **svp = av_fetch(padlist, i--, FALSE);
240 SV *sv = svp ? *svp : Nullsv;
241 if (sv)
242 SvREFCNT_dec(sv);
243 }
244
245 SvREFCNT_dec((SV*)padlist);
246 }
247}
248#endif
249
250/* the next two functions merely cache the padlists */
251STATIC void
252get_padlist (CV *cv)
253{
254 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
255
256 if (he && AvFILLp ((AV *)*he) >= 0)
257 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
258 else
259 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260}
261
262STATIC void
263put_padlist (CV *cv)
264{
265 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
266
267 if (SvTYPE (*he) != SVt_PVAV)
268 {
269 SvREFCNT_dec (*he);
270 *he = (SV *)newAV ();
271 }
272
273 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
274}
275
276#ifdef MAY_FLUSH
277STATIC void
278flush_padlist_cache ()
279{
280 HV *hv = padlist_cache;
281 padlist_cache = newHV ();
282
283 if (hv_iterinit (hv))
284 {
285 HE *he;
286 AV *padlist;
287
288 while (!!(he = hv_iternext (hv)))
289 {
290 AV *av = (AV *)HeVAL(he);
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (padlist);
295 }
296 }
297
298 SvREFCNT_dec (hv);
299}
300#endif
301
302#define SB do {
303#define SE } while (0)
304
305#define LOAD(state) load_state(aTHX_ (state));
306#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307
308#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
309
310static void
311load_state(pTHX_ Coro__State c)
312{
313 PL_dowarn = c->dowarn;
314 PL_in_eval = c->in_eval;
315
316 PL_curstackinfo = c->curstackinfo;
317 PL_curstack = c->curstack;
318 PL_mainstack = c->mainstack;
319 PL_stack_sp = c->stack_sp;
320 PL_op = c->op;
321 PL_curpad = c->curpad;
322 PL_comppad = c->comppad;
323 PL_stack_base = c->stack_base;
324 PL_stack_max = c->stack_max;
325 PL_tmps_stack = c->tmps_stack;
326 PL_tmps_floor = c->tmps_floor;
327 PL_tmps_ix = c->tmps_ix;
328 PL_tmps_max = c->tmps_max;
329 PL_markstack = c->markstack;
330 PL_markstack_ptr = c->markstack_ptr;
331 PL_markstack_max = c->markstack_max;
332 PL_scopestack = c->scopestack;
333 PL_scopestack_ix = c->scopestack_ix;
334 PL_scopestack_max = c->scopestack_max;
335 PL_savestack = c->savestack;
336 PL_savestack_ix = c->savestack_ix;
337 PL_savestack_max = c->savestack_max;
338 PL_retstack = c->retstack;
339 PL_retstack_ix = c->retstack_ix;
340 PL_retstack_max = c->retstack_max;
341 PL_curcop = c->curcop;
342 PL_top_env = c->top_env;
343
344 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347
348 {
349 dSP;
350 CV *cv;
351
352 /* now do the ugly restore mess */
353 while ((cv = (CV *)POPs))
354 {
355 AV *padlist = (AV *)POPs;
356
357 if (padlist)
358 {
359 put_padlist (cv); /* mark this padlist as available */
360 CvPADLIST(cv) = padlist;
361#ifdef USE_THREADS
362 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363#endif
364 }
365
366 ++CvDEPTH(cv);
367 }
368
369 PUTBACK;
370 }
371}
372
373static void
374save_state(pTHX_ Coro__State c, int flags)
375{
376 {
377 dSP;
378 I32 cxix = cxstack_ix;
379 PERL_CONTEXT *ccstk = cxstack;
380 PERL_SI *top_si = PL_curstackinfo;
381
382 /*
383 * the worst thing you can imagine happens first - we have to save
384 * (and reinitialize) all cv's in the whole callchain :(
385 */
386
387 PUSHs (Nullsv);
388 /* this loop was inspired by pp_caller */
389 for (;;)
390 {
391 while (cxix >= 0)
392 {
393 PERL_CONTEXT *cx = &ccstk[cxix--];
394
395 if (CxTYPE(cx) == CXt_SUB)
396 {
397 CV *cv = cx->blk_sub.cv;
398 if (CvDEPTH(cv))
399 {
400#ifdef USE_THREADS
401 /*XPUSHs ((SV *)CvOWNER(cv));*/
402 /*CvOWNER(cv) = 0;*/
403 /*error must unlock this cv etc.. etc...*/
404#endif
405 EXTEND (SP, CvDEPTH(cv)*2);
406
407 while (--CvDEPTH(cv))
408 {
409 /* this tells the restore code to increment CvDEPTH */
410 PUSHs (Nullsv);
411 PUSHs ((SV *)cv);
412 }
413
414 PUSHs ((SV *)CvPADLIST(cv));
415 PUSHs ((SV *)cv);
416
417 get_padlist (cv); /* this is a monster */
418 }
419 }
420#ifdef CXt_FORMAT
421 else if (CxTYPE(cx) == CXt_FORMAT)
422 {
423 /* I never used formats, so how should I know how these are implemented? */
424 /* my bold guess is as a simple, plain sub... */
425 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426 }
427#endif
428 }
429
430 if (top_si->si_type == PERLSI_MAIN)
431 break;
432
433 top_si = top_si->si_prev;
434 ccstk = top_si->si_cxstack;
435 cxix = top_si->si_cxix;
436 }
437
438 PUTBACK;
439 }
440
441 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
444
445 c->dowarn = PL_dowarn;
446 c->in_eval = PL_in_eval;
447
448 c->curstackinfo = PL_curstackinfo;
449 c->curstack = PL_curstack;
450 c->mainstack = PL_mainstack;
451 c->stack_sp = PL_stack_sp;
452 c->op = PL_op;
453 c->curpad = PL_curpad;
454 c->comppad = PL_comppad;
455 c->stack_base = PL_stack_base;
456 c->stack_max = PL_stack_max;
457 c->tmps_stack = PL_tmps_stack;
458 c->tmps_floor = PL_tmps_floor;
459 c->tmps_ix = PL_tmps_ix;
460 c->tmps_max = PL_tmps_max;
461 c->markstack = PL_markstack;
462 c->markstack_ptr = PL_markstack_ptr;
463 c->markstack_max = PL_markstack_max;
464 c->scopestack = PL_scopestack;
465 c->scopestack_ix = PL_scopestack_ix;
466 c->scopestack_max = PL_scopestack_max;
467 c->savestack = PL_savestack;
468 c->savestack_ix = PL_savestack_ix;
469 c->savestack_max = PL_savestack_max;
470 c->retstack = PL_retstack;
471 c->retstack_ix = PL_retstack_ix;
472 c->retstack_max = PL_retstack_max;
473 c->curcop = PL_curcop;
474 c->top_env = PL_top_env;
475}
476
477/*
478 * allocate various perl stacks. This is an exact copy
479 * of perl.c:init_stacks, except that it uses less memory
480 * on the assumption that coroutines do not usually need
481 * a lot of stackspace.
482 */
483STATIC void
484coro_init_stacks (pTHX)
485{
486 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487 PL_curstackinfo->si_type = PERLSI_MAIN;
488 PL_curstack = PL_curstackinfo->si_stack;
489 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490
491 PL_stack_base = AvARRAY(PL_curstack);
492 PL_stack_sp = PL_stack_base;
493 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494
495 New(50,PL_tmps_stack,96,SV*);
496 PL_tmps_floor = -1;
497 PL_tmps_ix = -1;
498 PL_tmps_max = 96;
499
500 New(54,PL_markstack,16,I32);
501 PL_markstack_ptr = PL_markstack;
502 PL_markstack_max = PL_markstack + 16;
503
504#ifdef SET_MARK_OFFSET
505 SET_MARK_OFFSET;
506#endif
507
508 New(54,PL_scopestack,16,I32);
509 PL_scopestack_ix = 0;
510 PL_scopestack_max = 16;
511
512 New(54,PL_savestack,96,ANY);
513 PL_savestack_ix = 0;
514 PL_savestack_max = 96;
515
516 New(54,PL_retstack,8,OP*);
517 PL_retstack_ix = 0;
518 PL_retstack_max = 8;
519}
520
521/*
522 * destroy the stacks, the callchain etc...
523 * still there is a memleak of 128 bytes...
524 */
525STATIC void
526destroy_stacks(pTHX)
527{
528 if (!IN_DESTRUCT)
529 {
530 /* is this ugly, I ask? */
531 while (PL_scopestack_ix)
532 LEAVE;
533
534 /* sure it is, but more important: is it correct?? :/ */
535 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536 FREETMPS;
537 }
538
539 while (PL_curstackinfo->si_next)
540 PL_curstackinfo = PL_curstackinfo->si_next;
541
542 while (PL_curstackinfo)
543 {
544 PERL_SI *p = PL_curstackinfo->si_prev;
545
546 {
547 dSP;
548 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549 PUTBACK; /* possibly superfluous */
550 }
551
552 if (!IN_DESTRUCT)
553 {
554 dounwind(-1);
555 SvREFCNT_dec(PL_curstackinfo->si_stack);
556 }
557
558 Safefree(PL_curstackinfo->si_cxstack);
559 Safefree(PL_curstackinfo);
560 PL_curstackinfo = p;
561 }
562
563 Safefree(PL_tmps_stack);
564 Safefree(PL_markstack);
565 Safefree(PL_scopestack);
566 Safefree(PL_savestack);
567 Safefree(PL_retstack);
568}
569
570static void
571allocate_stack (Coro__State ctx, int alloc)
572{
573 coro_stack *stack;
574
575 New (0, stack, 1, coro_stack);
576
577 stack->refcnt = 1;
578 stack->usecnt = 1;
579 stack->gencnt = ctx->gencnt = 0;
580 if (alloc)
581 {
582#if HAVE_MMAP
583 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585 if (stack->sptr == (void *)-1)
586#endif
587 {
588 /*FIXME*//*D*//* reasonable stack size! */
589 stack->ssize = -4096 * sizeof (long);
590 New (0, stack->sptr, 4096, long);
591 }
592 }
593 else
594 stack->sptr = 0;
595
596 ctx->stack = stack;
597}
598
599static void
600deallocate_stack (Coro__State ctx)
601{
602 coro_stack *stack = ctx->stack;
603
604 ctx->stack = 0;
605
606 if (stack)
607 {
608 if (!--stack->refcnt)
609 {
610#ifdef HAVE_MMAP
611 if (stack->ssize > 0 && stack->sptr)
612 munmap (stack->sptr, stack->ssize);
613 else
614#else
615 Safefree (stack->sptr);
616#endif
617 Safefree (stack);
618 }
619 else if (ctx->gencnt == stack->gencnt)
620 --stack->usecnt;
621 }
622}
623
624static void
625setup_coro (void *arg)
626{
627 /*
628 * emulate part of the perl startup here.
629 */
630 dSP;
631 Coro__State ctx = (Coro__State)arg;
632 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
633
634 coro_init_stacks (aTHX);
635 /*PL_curcop = 0;*/
636 /*PL_in_eval = PL_in_eval;*/ /* inherit */
637 SvREFCNT_dec (GvAV (PL_defgv));
638 GvAV (PL_defgv) = ctx->args;
639
640 SPAGAIN;
641
642 if (ctx->stack)
643 {
644 ctx->cursp = 0;
645
646 PUSHMARK(SP);
647 PUTBACK;
648 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650 if (SvTRUE (ERRSV))
651 croak (NULL);
652 else
653 croak ("FATAL: CCTXT coroutine returned!");
654 }
655 else
656 {
657 UNOP myop;
658
659 PL_op = (OP *)&myop;
660
661 Zero(&myop, 1, UNOP);
662 myop.op_next = Nullop;
663 myop.op_flags = OPf_WANT_VOID;
664
665 PUSHMARK(SP);
666 XPUSHs (sub_init);
667 /*
668 * the next line is slightly wrong, as PL_op->op_next
669 * is actually being executed so we skip the first op.
670 * that doesn't matter, though, since it is only
671 * pp_nextstate and we never return...
672 * ah yes, and I don't care anyways ;)
673 */
674 PUTBACK;
675 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676 SPAGAIN;
677
678 ENTER; /* necessary e.g. for dounwind */
679 }
680}
681
682static void
683continue_coro (void *arg)
684{
685 /*
686 * this is a _very_ stripped down perl interpreter ;)
687 */
688 Coro__State ctx = (Coro__State)arg;
689 JMPENV coro_start_env;
690
691 PL_top_env = &ctx->start_env;
692
693 ctx->cursp = 0;
694 PL_op = PL_op->op_next;
695 CALLRUNOPS(aTHX);
696
697 abort ();
698}
699
700STATIC void
701transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
702{
703 dSTACKLEVEL;
704 static struct coro *xnext;
705
706 if (prev != next)
707 {
708 xnext = next;
709
710 if (next->mainstack)
711 {
712 SAVE (prev, flags);
713 LOAD (next);
714
715 /* mark this state as in-use */
716 next->mainstack = 0;
717 next->tmps_ix = -2;
718
719 /* stacklevel changed? if yes, grab the stack for us! */
720 if (flags & TRANSFER_SAVE_CCTXT)
721 {
722 if (!prev->stack)
723 allocate_stack (prev, 0);
724 else if (prev->cursp != stacklevel
725 && prev->stack->usecnt > 1)
726 {
727 prev->gencnt = ++prev->stack->gencnt;
728 prev->stack->usecnt = 1;
729 }
730
731 /* has our stack been invalidated? */
732 if (next->stack && next->stack->gencnt != next->gencnt)
733 {
734 deallocate_stack (next);
735 allocate_stack (next, 1);
736 coro_create (&(next->stack->cctx),
737 continue_coro, (void *)next,
738 next->stack->sptr, labs (next->stack->ssize));
739 }
740
741 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742 /* don't add any code here */
743 }
744
745 }
746 else if (next->tmps_ix == -2)
747 croak ("tried to transfer to running coroutine");
748 else
749 {
750 SAVE (prev, -1); /* first get rid of the old state */
751
752 if (flags & TRANSFER_SAVE_CCTXT)
753 {
754 if (!prev->stack)
755 allocate_stack (prev, 0);
756
757 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758 {
759 PL_top_env = &next->start_env;
760
761 setup_coro (next);
762
763 prev->stack->refcnt++;
764 prev->stack->usecnt++;
765 next->stack = prev->stack;
766 next->gencnt = prev->gencnt;
767 }
768 else
769 {
770 allocate_stack (next, 1);
771 coro_create (&(next->stack->cctx),
772 setup_coro, (void *)next,
773 next->stack->sptr, labs (next->stack->ssize));
774 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775 /* don't add any code here */
776 }
777 }
778 else
779 setup_coro (next);
780 }
781
782 /*
783 * xnext is now either prev or next, depending on wether
784 * we switched the c stack or not. that's why I use a global
785 * variable, that should become thread-specific at one point.
786 */
787 xnext->cursp = stacklevel;
788 }
789
790 if (coro_mortal)
791 {
792 SvREFCNT_dec (coro_mortal);
793 coro_mortal = 0;
794 }
795}
796
797#define SV_CORO(sv,func) \
798 do { \
799 if (SvROK (sv)) \
800 sv = SvRV (sv); \
801 \
802 if (SvTYPE(sv) == SVt_PVHV) \
803 { \
804 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
805 \
806 if (!he) \
807 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808 \
809 (sv) = SvRV (HeVAL(he)); \
810 } \
811 \
812 /* must also be changed inside Coro::Cont::yield */ \
813 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
814 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815 \
816 } while(0)
817
818#define SvSTATE(sv) (struct coro *)SvIV (sv)
819
820static void
821api_transfer(pTHX_ SV *prev, SV *next, int flags)
822{
823 SV_CORO (prev, "Coro::transfer");
824 SV_CORO (next, "Coro::transfer");
825
826 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
827}
828 305
829/** Coro ********************************************************************/ 306/** Coro ********************************************************************/
830 307
831#define PRIO_MAX 3 308#define PRIO_MAX 3
832#define PRIO_HIGH 1 309#define PRIO_HIGH 1
… …
834#define PRIO_LOW -1 311#define PRIO_LOW -1
835#define PRIO_IDLE -3 312#define PRIO_IDLE -3
836#define PRIO_MIN -4 313#define PRIO_MIN -4
837 314
838/* for Coro.pm */ 315/* for Coro.pm */
839static GV *coro_current, *coro_idle; 316static SV *coro_current;
317static SV *coro_readyhook;
840static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 318static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
841static int coro_nready; 319static CV *cv_coro_run, *cv_coro_terminate;
320static struct coro *coro_first;
321#define coro_nready coroapi.nready
842 322
843static void 323/** lowlevel stuff **********************************************************/
844coro_enq (SV *sv)
845{
846 if (SvTYPE (sv) == SVt_PVHV)
847 {
848 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
849 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851 prio = prio > PRIO_MAX ? PRIO_MAX
852 : prio < PRIO_MIN ? PRIO_MIN
853 : prio;
854
855 av_push (coro_ready [prio - PRIO_MIN], sv);
856 coro_nready++;
857
858 return;
859 }
860
861 croak ("Coro::ready tried to enqueue something that is not a coroutine");
862}
863 324
864static SV * 325static SV *
865coro_deq (int min_prio) 326coro_get_sv (pTHX_ const char *name, int create)
866{ 327{
867 int prio = PRIO_MAX - PRIO_MIN; 328#if PERL_VERSION_ATLEAST (5,10,0)
329 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
330 get_sv (name, create);
331#endif
332 return get_sv (name, create);
333}
868 334
869 min_prio -= PRIO_MIN; 335static AV *
870 if (min_prio < 0) 336coro_get_av (pTHX_ const char *name, int create)
871 min_prio = 0; 337{
338#if PERL_VERSION_ATLEAST (5,10,0)
339 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
340 get_av (name, create);
341#endif
342 return get_av (name, create);
343}
872 344
873 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 345static HV *
874 if (av_len (coro_ready[prio]) >= 0) 346coro_get_hv (pTHX_ const char *name, int create)
875 { 347{
876 coro_nready--; 348#if PERL_VERSION_ATLEAST (5,10,0)
877 return av_shift (coro_ready[prio]); 349 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
878 } 350 get_hv (name, create);
351#endif
352 return get_hv (name, create);
353}
879 354
355/* may croak */
356INLINE CV *
357coro_sv_2cv (pTHX_ SV *sv)
358{
359 HV *st;
360 GV *gvp;
361 CV *cv = sv_2cv (sv, &st, &gvp, 0);
362
363 if (!cv)
364 croak ("code reference expected");
365
880 return 0; 366 return cv;
881} 367}
882 368
883static void 369/*****************************************************************************/
884api_ready (SV *coro) 370/* magic glue */
371
372#define CORO_MAGIC_type_cv 26
373#define CORO_MAGIC_type_state PERL_MAGIC_ext
374
375#define CORO_MAGIC_NN(sv, type) \
376 (expect_true (SvMAGIC (sv)->mg_type == type) \
377 ? SvMAGIC (sv) \
378 : mg_find (sv, type))
379
380#define CORO_MAGIC(sv, type) \
381 (expect_true (SvMAGIC (sv)) \
382 ? CORO_MAGIC_NN (sv, type) \
383 : 0)
384
385#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
386#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
387
388INLINE struct coro *
389SvSTATE_ (pTHX_ SV *coro)
885{ 390{
391 HV *stash;
392 MAGIC *mg;
393
886 if (SvROK (coro)) 394 if (SvROK (coro))
887 coro = SvRV (coro); 395 coro = SvRV (coro);
888 396
889 coro_enq (SvREFCNT_inc (coro)); 397 if (expect_false (SvTYPE (coro) != SVt_PVHV))
890} 398 croak ("Coro::State object required");
891 399
400 stash = SvSTASH (coro);
401 if (expect_false (stash != coro_stash && stash != coro_state_stash))
402 {
403 /* very slow, but rare, check */
404 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
405 croak ("Coro::State object required");
406 }
407
408 mg = CORO_MAGIC_state (coro);
409 return (struct coro *)mg->mg_ptr;
410}
411
412#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
413
414/* faster than SvSTATE, but expects a coroutine hv */
415#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
416#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
417
418/*****************************************************************************/
419/* padlist management and caching */
420
421static AV *
422coro_derive_padlist (pTHX_ CV *cv)
423{
424 AV *padlist = CvPADLIST (cv);
425 AV *newpadlist, *newpad;
426
427 newpadlist = newAV ();
428 AvREAL_off (newpadlist);
429#if PERL_VERSION_ATLEAST (5,10,0)
430 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
431#else
432 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
433#endif
434 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
435 --AvFILLp (padlist);
436
437 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
438 av_store (newpadlist, 1, (SV *)newpad);
439
440 return newpadlist;
441}
442
443static void
444free_padlist (pTHX_ AV *padlist)
445{
446 /* may be during global destruction */
447 if (!IN_DESTRUCT)
448 {
449 I32 i = AvFILLp (padlist);
450
451 while (i > 0) /* special-case index 0 */
452 {
453 /* we try to be extra-careful here */
454 AV *av = (AV *)AvARRAY (padlist)[i--];
455 I32 j = AvFILLp (av);
456
457 while (j >= 0)
458 SvREFCNT_dec (AvARRAY (av)[j--]);
459
460 AvFILLp (av) = -1;
461 SvREFCNT_dec (av);
462 }
463
464 SvREFCNT_dec (AvARRAY (padlist)[0]);
465
466 AvFILLp (padlist) = -1;
467 SvREFCNT_dec ((SV*)padlist);
468 }
469}
470
892static void 471static int
893api_schedule (void) 472coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
894{ 473{
895 SV *prev, *next; 474 AV *padlist;
475 AV *av = (AV *)mg->mg_obj;
896 476
477 /* casting is fun. */
478 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
479 free_padlist (aTHX_ padlist);
480
481 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
482
483 return 0;
484}
485
486static MGVTBL coro_cv_vtbl = {
487 0, 0, 0, 0,
488 coro_cv_free
489};
490
491/* the next two functions merely cache the padlists */
492static void
493get_padlist (pTHX_ CV *cv)
494{
495 MAGIC *mg = CORO_MAGIC_cv (cv);
496 AV *av;
497
498 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
499 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
500 else
501 {
502#if CORO_PREFER_PERL_FUNCTIONS
503 /* this is probably cleaner? but also slower! */
504 /* in practise, it seems to be less stable */
505 CV *cp = Perl_cv_clone (aTHX_ cv);
506 CvPADLIST (cv) = CvPADLIST (cp);
507 CvPADLIST (cp) = 0;
508 SvREFCNT_dec (cp);
509#else
510 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
511#endif
512 }
513}
514
515static void
516put_padlist (pTHX_ CV *cv)
517{
518 MAGIC *mg = CORO_MAGIC_cv (cv);
519 AV *av;
520
521 if (expect_false (!mg))
522 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
523
524 av = (AV *)mg->mg_obj;
525
526 if (expect_false (AvFILLp (av) >= AvMAX (av)))
527 av_extend (av, AvFILLp (av) + 1);
528
529 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
530}
531
532/** load & save, init *******************************************************/
533
534static void
535on_enterleave_call (pTHX_ SV *cb);
536
537static void
538load_perl (pTHX_ Coro__State c)
539{
540 perl_slots *slot = c->slot;
541 c->slot = 0;
542
543 PL_mainstack = c->mainstack;
544
545 GvSV (PL_defgv) = slot->defsv;
546 GvAV (PL_defgv) = slot->defav;
547 GvSV (PL_errgv) = slot->errsv;
548 GvSV (irsgv) = slot->irsgv;
549 GvHV (PL_hintgv) = slot->hinthv;
550
551 #define VAR(name,type) PL_ ## name = slot->name;
552 # include "state.h"
553 #undef VAR
554
555 {
556 dSP;
557
558 CV *cv;
559
560 /* now do the ugly restore mess */
561 while (expect_true (cv = (CV *)POPs))
562 {
563 put_padlist (aTHX_ cv); /* mark this padlist as available */
564 CvDEPTH (cv) = PTR2IV (POPs);
565 CvPADLIST (cv) = (AV *)POPs;
566 }
567
568 PUTBACK;
569 }
570
571 slf_frame = c->slf_frame;
572 CORO_THROW = c->except;
573
574 if (expect_false (c->on_enter))
575 {
576 int i;
577
578 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
579 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
580 }
581}
582
583static void
584save_perl (pTHX_ Coro__State c)
585{
586 if (expect_false (c->on_leave))
587 {
588 int i;
589
590 for (i = AvFILLp (c->on_leave); i >= 0; --i)
591 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
592 }
593
594 c->except = CORO_THROW;
595 c->slf_frame = slf_frame;
596
597 {
598 dSP;
599 I32 cxix = cxstack_ix;
600 PERL_CONTEXT *ccstk = cxstack;
601 PERL_SI *top_si = PL_curstackinfo;
602
603 /*
604 * the worst thing you can imagine happens first - we have to save
605 * (and reinitialize) all cv's in the whole callchain :(
606 */
607
608 XPUSHs (Nullsv);
609 /* this loop was inspired by pp_caller */
610 for (;;)
611 {
612 while (expect_true (cxix >= 0))
613 {
614 PERL_CONTEXT *cx = &ccstk[cxix--];
615
616 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
617 {
618 CV *cv = cx->blk_sub.cv;
619
620 if (expect_true (CvDEPTH (cv)))
621 {
622 EXTEND (SP, 3);
623 PUSHs ((SV *)CvPADLIST (cv));
624 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
625 PUSHs ((SV *)cv);
626
627 CvDEPTH (cv) = 0;
628 get_padlist (aTHX_ cv);
629 }
630 }
631 }
632
633 if (expect_true (top_si->si_type == PERLSI_MAIN))
634 break;
635
636 top_si = top_si->si_prev;
637 ccstk = top_si->si_cxstack;
638 cxix = top_si->si_cxix;
639 }
640
641 PUTBACK;
642 }
643
644 /* allocate some space on the context stack for our purposes */
645 /* we manually unroll here, as usually 2 slots is enough */
646 if (SLOT_COUNT >= 1) CXINC;
647 if (SLOT_COUNT >= 2) CXINC;
648 if (SLOT_COUNT >= 3) CXINC;
649 {
650 int i;
651 for (i = 3; i < SLOT_COUNT; ++i)
652 CXINC;
653 }
654 cxstack_ix -= SLOT_COUNT; /* undo allocation */
655
656 c->mainstack = PL_mainstack;
657
658 {
659 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
660
661 slot->defav = GvAV (PL_defgv);
662 slot->defsv = DEFSV;
663 slot->errsv = ERRSV;
664 slot->irsgv = GvSV (irsgv);
665 slot->hinthv = GvHV (PL_hintgv);
666
667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR
670 }
671}
672
673/*
674 * allocate various perl stacks. This is almost an exact copy
675 * of perl.c:init_stacks, except that it uses less memory
676 * on the (sometimes correct) assumption that coroutines do
677 * not usually need a lot of stackspace.
678 */
679#if CORO_PREFER_PERL_FUNCTIONS
680# define coro_init_stacks(thx) init_stacks ()
681#else
682static void
683coro_init_stacks (pTHX)
684{
685 PL_curstackinfo = new_stackinfo(32, 8);
686 PL_curstackinfo->si_type = PERLSI_MAIN;
687 PL_curstack = PL_curstackinfo->si_stack;
688 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
689
690 PL_stack_base = AvARRAY(PL_curstack);
691 PL_stack_sp = PL_stack_base;
692 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
693
694 New(50,PL_tmps_stack,32,SV*);
695 PL_tmps_floor = -1;
696 PL_tmps_ix = -1;
697 PL_tmps_max = 32;
698
699 New(54,PL_markstack,16,I32);
700 PL_markstack_ptr = PL_markstack;
701 PL_markstack_max = PL_markstack + 16;
702
703#ifdef SET_MARK_OFFSET
704 SET_MARK_OFFSET;
705#endif
706
707 New(54,PL_scopestack,8,I32);
708 PL_scopestack_ix = 0;
709 PL_scopestack_max = 8;
710
711 New(54,PL_savestack,24,ANY);
712 PL_savestack_ix = 0;
713 PL_savestack_max = 24;
714
715#if !PERL_VERSION_ATLEAST (5,10,0)
716 New(54,PL_retstack,4,OP*);
717 PL_retstack_ix = 0;
718 PL_retstack_max = 4;
719#endif
720}
721#endif
722
723/*
724 * destroy the stacks, the callchain etc...
725 */
726static void
727coro_destruct_stacks (pTHX)
728{
729 while (PL_curstackinfo->si_next)
730 PL_curstackinfo = PL_curstackinfo->si_next;
731
732 while (PL_curstackinfo)
733 {
734 PERL_SI *p = PL_curstackinfo->si_prev;
735
736 if (!IN_DESTRUCT)
737 SvREFCNT_dec (PL_curstackinfo->si_stack);
738
739 Safefree (PL_curstackinfo->si_cxstack);
740 Safefree (PL_curstackinfo);
741 PL_curstackinfo = p;
742 }
743
744 Safefree (PL_tmps_stack);
745 Safefree (PL_markstack);
746 Safefree (PL_scopestack);
747 Safefree (PL_savestack);
748#if !PERL_VERSION_ATLEAST (5,10,0)
749 Safefree (PL_retstack);
750#endif
751}
752
753#define CORO_RSS \
754 rss += sizeof (SYM (curstackinfo)); \
755 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
756 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
757 rss += SYM (tmps_max) * sizeof (SV *); \
758 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
759 rss += SYM (scopestack_max) * sizeof (I32); \
760 rss += SYM (savestack_max) * sizeof (ANY);
761
762static size_t
763coro_rss (pTHX_ struct coro *coro)
764{
765 size_t rss = sizeof (*coro);
766
767 if (coro->mainstack)
768 {
769 if (coro->flags & CF_RUNNING)
770 {
771 #define SYM(sym) PL_ ## sym
772 CORO_RSS;
773 #undef SYM
774 }
775 else
776 {
777 #define SYM(sym) coro->slot->sym
778 CORO_RSS;
779 #undef SYM
780 }
781 }
782
783 return rss;
784}
785
786/** coroutine stack handling ************************************************/
787
788static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
789static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
790static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
791
792/* apparently < 5.8.8 */
793#ifndef MgPV_nolen_const
794#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
795 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
796 (const char*)(mg)->mg_ptr)
797#endif
798
799/*
800 * This overrides the default magic get method of %SIG elements.
801 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
802 * and instead of trying to save and restore the hash elements, we just provide
803 * readback here.
804 */
805static int
806coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
807{
808 const char *s = MgPV_nolen_const (mg);
809
810 if (*s == '_')
811 {
812 SV **svp = 0;
813
814 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
815 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
816
817 if (svp)
818 {
819 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
820 return 0;
821 }
822 }
823
824 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
825}
826
827static int
828coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
829{
830 const char *s = MgPV_nolen_const (mg);
831
832 if (*s == '_')
833 {
834 SV **svp = 0;
835
836 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
837 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
838
839 if (svp)
840 {
841 SV *old = *svp;
842 *svp = 0;
843 SvREFCNT_dec (old);
844 return 0;
845 }
846 }
847
848 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
849}
850
851static int
852coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
853{
854 const char *s = MgPV_nolen_const (mg);
855
856 if (*s == '_')
857 {
858 SV **svp = 0;
859
860 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
861 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
862
863 if (svp)
864 {
865 SV *old = *svp;
866 *svp = SvOK (sv) ? newSVsv (sv) : 0;
867 SvREFCNT_dec (old);
868 return 0;
869 }
870 }
871
872 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
873}
874
875static void
876prepare_nop (pTHX_ struct coro_transfer_args *ta)
877{
878 /* kind of mega-hacky, but works */
879 ta->next = ta->prev = (struct coro *)ta;
880}
881
882static int
883slf_check_nop (pTHX_ struct CoroSLF *frame)
884{
885 return 0;
886}
887
888static int
889slf_check_repeat (pTHX_ struct CoroSLF *frame)
890{
891 return 1;
892}
893
894static UNOP coro_setup_op;
895
896static void NOINLINE /* noinline to keep it out of the transfer fast path */
897coro_setup (pTHX_ struct coro *coro)
898{
899 /*
900 * emulate part of the perl startup here.
901 */
902 coro_init_stacks (aTHX);
903
904 PL_runops = RUNOPS_DEFAULT;
905 PL_curcop = &PL_compiling;
906 PL_in_eval = EVAL_NULL;
907 PL_comppad = 0;
908 PL_comppad_name = 0;
909 PL_comppad_name_fill = 0;
910 PL_comppad_name_floor = 0;
911 PL_curpm = 0;
912 PL_curpad = 0;
913 PL_localizing = 0;
914 PL_dirty = 0;
915 PL_restartop = 0;
916#if PERL_VERSION_ATLEAST (5,10,0)
917 PL_parser = 0;
918#endif
919 PL_hints = 0;
920
921 /* recreate the die/warn hooks */
922 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
923 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
924
925 GvSV (PL_defgv) = newSV (0);
926 GvAV (PL_defgv) = coro->args; coro->args = 0;
927 GvSV (PL_errgv) = newSV (0);
928 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
929 GvHV (PL_hintgv) = 0;
930 PL_rs = newSVsv (GvSV (irsgv));
931 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
932
933 {
934 dSP;
935 UNOP myop;
936
937 Zero (&myop, 1, UNOP);
938 myop.op_next = Nullop;
939 myop.op_type = OP_ENTERSUB;
940 myop.op_flags = OPf_WANT_VOID;
941
942 PUSHMARK (SP);
943 PUSHs ((SV *)coro->startcv);
944 PUTBACK;
945 PL_op = (OP *)&myop;
946 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
947 }
948
949 /* this newly created coroutine might be run on an existing cctx which most
950 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
951 */
952 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
953 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
954
955 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
956 coro_setup_op.op_next = PL_op;
957 coro_setup_op.op_type = OP_ENTERSUB;
958 coro_setup_op.op_ppaddr = pp_slf;
959 /* no flags etc. required, as an init function won't be called */
960
961 PL_op = (OP *)&coro_setup_op;
962
963 /* copy throw, in case it was set before coro_setup */
964 CORO_THROW = coro->except;
965}
966
967static void
968coro_unwind_stacks (pTHX)
969{
970 if (!IN_DESTRUCT)
971 {
972 /* restore all saved variables and stuff */
973 LEAVE_SCOPE (0);
974 assert (PL_tmps_floor == -1);
975
976 /* free all temporaries */
977 FREETMPS;
978 assert (PL_tmps_ix == -1);
979
980 /* unwind all extra stacks */
981 POPSTACK_TO (PL_mainstack);
982
983 /* unwind main stack */
984 dounwind (-1);
985 }
986}
987
988static void
989coro_destruct_perl (pTHX_ struct coro *coro)
990{
991 coro_unwind_stacks (aTHX);
992
993 SvREFCNT_dec (GvSV (PL_defgv));
994 SvREFCNT_dec (GvAV (PL_defgv));
995 SvREFCNT_dec (GvSV (PL_errgv));
996 SvREFCNT_dec (PL_defoutgv);
997 SvREFCNT_dec (PL_rs);
998 SvREFCNT_dec (GvSV (irsgv));
999 SvREFCNT_dec (GvHV (PL_hintgv));
1000
1001 SvREFCNT_dec (PL_diehook);
1002 SvREFCNT_dec (PL_warnhook);
1003
1004 SvREFCNT_dec (coro->saved_deffh);
1005 SvREFCNT_dec (coro->rouse_cb);
1006 SvREFCNT_dec (coro->invoke_cb);
1007 SvREFCNT_dec (coro->invoke_av);
1008
1009 coro_destruct_stacks (aTHX);
1010}
1011
1012INLINE void
1013free_coro_mortal (pTHX)
1014{
1015 if (expect_true (coro_mortal))
1016 {
1017 SvREFCNT_dec (coro_mortal);
1018 coro_mortal = 0;
1019 }
1020}
1021
1022static int
1023runops_trace (pTHX)
1024{
1025 COP *oldcop = 0;
1026 int oldcxix = -2;
1027
1028 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1029 {
1030 PERL_ASYNC_CHECK ();
1031
1032 if (cctx_current->flags & CC_TRACE_ALL)
1033 {
1034 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1035 {
1036 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1037 SV **bot, **top;
1038 AV *av = newAV (); /* return values */
1039 SV **cb;
1040 dSP;
1041
1042 GV *gv = CvGV (cx->blk_sub.cv);
1043 SV *fullname = sv_2mortal (newSV (0));
1044 if (isGV (gv))
1045 gv_efullname3 (fullname, gv, 0);
1046
1047 bot = PL_stack_base + cx->blk_oldsp + 1;
1048 top = cx->blk_gimme == G_ARRAY ? SP + 1
1049 : cx->blk_gimme == G_SCALAR ? bot + 1
1050 : bot;
1051
1052 av_extend (av, top - bot);
1053 while (bot < top)
1054 av_push (av, SvREFCNT_inc_NN (*bot++));
1055
1056 PL_runops = RUNOPS_DEFAULT;
1057 ENTER;
1058 SAVETMPS;
1059 EXTEND (SP, 3);
1060 PUSHMARK (SP);
1061 PUSHs (&PL_sv_no);
1062 PUSHs (fullname);
1063 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1064 PUTBACK;
1065 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1066 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1067 SPAGAIN;
1068 FREETMPS;
1069 LEAVE;
1070 PL_runops = runops_trace;
1071 }
1072
1073 if (oldcop != PL_curcop)
1074 {
1075 oldcop = PL_curcop;
1076
1077 if (PL_curcop != &PL_compiling)
1078 {
1079 SV **cb;
1080
1081 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1082 {
1083 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1084
1085 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1086 {
1087 dSP;
1088 GV *gv = CvGV (cx->blk_sub.cv);
1089 SV *fullname = sv_2mortal (newSV (0));
1090
1091 if (isGV (gv))
1092 gv_efullname3 (fullname, gv, 0);
1093
1094 PL_runops = RUNOPS_DEFAULT;
1095 ENTER;
1096 SAVETMPS;
1097 EXTEND (SP, 3);
1098 PUSHMARK (SP);
1099 PUSHs (&PL_sv_yes);
1100 PUSHs (fullname);
1101 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1102 PUTBACK;
1103 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1104 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1105 SPAGAIN;
1106 FREETMPS;
1107 LEAVE;
1108 PL_runops = runops_trace;
1109 }
1110
1111 oldcxix = cxstack_ix;
1112 }
1113
1114 if (cctx_current->flags & CC_TRACE_LINE)
1115 {
1116 dSP;
1117
1118 PL_runops = RUNOPS_DEFAULT;
1119 ENTER;
1120 SAVETMPS;
1121 EXTEND (SP, 3);
1122 PL_runops = RUNOPS_DEFAULT;
1123 PUSHMARK (SP);
1124 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1125 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1126 PUTBACK;
1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1129 SPAGAIN;
1130 FREETMPS;
1131 LEAVE;
1132 PL_runops = runops_trace;
1133 }
1134 }
1135 }
1136 }
1137 }
1138
1139 TAINT_NOT;
1140 return 0;
1141}
1142
1143static struct CoroSLF cctx_ssl_frame;
1144
1145static void
1146slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1147{
1148 ta->prev = 0;
1149}
1150
1151static int
1152slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1153{
1154 *frame = cctx_ssl_frame;
1155
1156 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1157}
1158
1159/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1160static void NOINLINE
1161cctx_prepare (pTHX)
1162{
1163 PL_top_env = &PL_start_env;
1164
1165 if (cctx_current->flags & CC_TRACE)
1166 PL_runops = runops_trace;
1167
1168 /* we already must be executing an SLF op, there is no other valid way
1169 * that can lead to creation of a new cctx */
1170 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1171 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1172
1173 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1174 cctx_ssl_frame = slf_frame;
1175
1176 slf_frame.prepare = slf_prepare_set_stacklevel;
1177 slf_frame.check = slf_check_set_stacklevel;
1178}
1179
1180/* the tail of transfer: execute stuff we can only do after a transfer */
1181INLINE void
1182transfer_tail (pTHX)
1183{
1184 free_coro_mortal (aTHX);
1185}
1186
1187/*
1188 * this is a _very_ stripped down perl interpreter ;)
1189 */
1190static void
1191cctx_run (void *arg)
1192{
1193#ifdef USE_ITHREADS
1194# if CORO_PTHREAD
1195 PERL_SET_CONTEXT (coro_thx);
1196# endif
1197#endif
1198 {
1199 dTHX;
1200
1201 /* normally we would need to skip the entersub here */
1202 /* not doing so will re-execute it, which is exactly what we want */
1203 /* PL_nop = PL_nop->op_next */
1204
1205 /* inject a fake subroutine call to cctx_init */
1206 cctx_prepare (aTHX);
1207
1208 /* cctx_run is the alternative tail of transfer() */
1209 transfer_tail (aTHX);
1210
1211 /* somebody or something will hit me for both perl_run and PL_restartop */
1212 PL_restartop = PL_op;
1213 perl_run (PL_curinterp);
1214 /*
1215 * Unfortunately, there is no way to get at the return values of the
1216 * coro body here, as perl_run destroys these
1217 */
1218
1219 /*
1220 * If perl-run returns we assume exit() was being called or the coro
1221 * fell off the end, which seems to be the only valid (non-bug)
1222 * reason for perl_run to return. We try to exit by jumping to the
1223 * bootstrap-time "top" top_env, as we cannot restore the "main"
1224 * coroutine as Coro has no such concept.
1225 * This actually isn't valid with the pthread backend, but OSes requiring
1226 * that backend are too broken to do it in a standards-compliant way.
1227 */
1228 PL_top_env = main_top_env;
1229 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1230 }
1231}
1232
1233static coro_cctx *
1234cctx_new ()
1235{
1236 coro_cctx *cctx;
1237
1238 ++cctx_count;
1239 New (0, cctx, 1, coro_cctx);
1240
1241 cctx->gen = cctx_gen;
1242 cctx->flags = 0;
1243 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1244
1245 return cctx;
1246}
1247
1248/* create a new cctx only suitable as source */
1249static coro_cctx *
1250cctx_new_empty ()
1251{
1252 coro_cctx *cctx = cctx_new ();
1253
1254 cctx->sptr = 0;
1255 coro_create (&cctx->cctx, 0, 0, 0, 0);
1256
1257 return cctx;
1258}
1259
1260/* create a new cctx suitable as destination/running a perl interpreter */
1261static coro_cctx *
1262cctx_new_run ()
1263{
1264 coro_cctx *cctx = cctx_new ();
1265 void *stack_start;
1266 size_t stack_size;
1267
1268#if HAVE_MMAP
1269 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1270 /* mmap supposedly does allocate-on-write for us */
1271 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1272
1273 if (cctx->sptr != (void *)-1)
1274 {
1275 #if CORO_STACKGUARD
1276 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1277 #endif
1278 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1279 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1280 cctx->flags |= CC_MAPPED;
1281 }
1282 else
1283#endif
1284 {
1285 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1286 New (0, cctx->sptr, cctx_stacksize, long);
1287
1288 if (!cctx->sptr)
1289 {
1290 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1291 _exit (EXIT_FAILURE);
1292 }
1293
1294 stack_start = cctx->sptr;
1295 stack_size = cctx->ssize;
1296 }
1297
1298 #if CORO_USE_VALGRIND
1299 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1300 #endif
1301
1302 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1303
1304 return cctx;
1305}
1306
1307static void
1308cctx_destroy (coro_cctx *cctx)
1309{
1310 if (!cctx)
1311 return;
1312
1313 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1314
1315 --cctx_count;
1316 coro_destroy (&cctx->cctx);
1317
1318 /* coro_transfer creates new, empty cctx's */
1319 if (cctx->sptr)
1320 {
1321 #if CORO_USE_VALGRIND
1322 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1323 #endif
1324
1325#if HAVE_MMAP
1326 if (cctx->flags & CC_MAPPED)
1327 munmap (cctx->sptr, cctx->ssize);
1328 else
1329#endif
1330 Safefree (cctx->sptr);
1331 }
1332
1333 Safefree (cctx);
1334}
1335
1336/* wether this cctx should be destructed */
1337#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1338
1339static coro_cctx *
1340cctx_get (pTHX)
1341{
1342 while (expect_true (cctx_first))
1343 {
1344 coro_cctx *cctx = cctx_first;
1345 cctx_first = cctx->next;
1346 --cctx_idle;
1347
1348 if (expect_true (!CCTX_EXPIRED (cctx)))
1349 return cctx;
1350
1351 cctx_destroy (cctx);
1352 }
1353
1354 return cctx_new_run ();
1355}
1356
1357static void
1358cctx_put (coro_cctx *cctx)
1359{
1360 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1361
1362 /* free another cctx if overlimit */
1363 if (expect_false (cctx_idle >= cctx_max_idle))
1364 {
1365 coro_cctx *first = cctx_first;
1366 cctx_first = first->next;
1367 --cctx_idle;
1368
1369 cctx_destroy (first);
1370 }
1371
1372 ++cctx_idle;
1373 cctx->next = cctx_first;
1374 cctx_first = cctx;
1375}
1376
1377/** coroutine switching *****************************************************/
1378
1379static void
1380transfer_check (pTHX_ struct coro *prev, struct coro *next)
1381{
1382 /* TODO: throwing up here is considered harmful */
1383
1384 if (expect_true (prev != next))
1385 {
1386 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1387 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1388
1389 if (expect_false (next->flags & CF_RUNNING))
1390 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1391
1392 if (expect_false (next->flags & CF_DESTROYED))
1393 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1394
1395#if !PERL_VERSION_ATLEAST (5,10,0)
1396 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1397 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1398#endif
1399 }
1400}
1401
1402/* always use the TRANSFER macro */
1403static void NOINLINE /* noinline so we have a fixed stackframe */
1404transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1405{
1406 dSTACKLEVEL;
1407
1408 /* sometimes transfer is only called to set idle_sp */
1409 if (expect_false (!prev))
1410 {
1411 cctx_current->idle_sp = STACKLEVEL;
1412 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1413 }
1414 else if (expect_true (prev != next))
1415 {
1416 coro_cctx *cctx_prev;
1417
1418 if (expect_false (prev->flags & CF_NEW))
1419 {
1420 /* create a new empty/source context */
1421 prev->flags &= ~CF_NEW;
1422 prev->flags |= CF_RUNNING;
1423 }
1424
1425 prev->flags &= ~CF_RUNNING;
1426 next->flags |= CF_RUNNING;
1427
1428 /* first get rid of the old state */
1429 save_perl (aTHX_ prev);
1430
1431 if (expect_false (next->flags & CF_NEW))
1432 {
1433 /* need to start coroutine */
1434 next->flags &= ~CF_NEW;
1435 /* setup coroutine call */
1436 coro_setup (aTHX_ next);
1437 }
1438 else
1439 load_perl (aTHX_ next);
1440
1441 /* possibly untie and reuse the cctx */
1442 if (expect_true (
1443 cctx_current->idle_sp == STACKLEVEL
1444 && !(cctx_current->flags & CC_TRACE)
1445 && !force_cctx
1446 ))
1447 {
1448 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1449 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1450
1451 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1452 /* without this the next cctx_get might destroy the running cctx while still in use */
1453 if (expect_false (CCTX_EXPIRED (cctx_current)))
1454 if (expect_true (!next->cctx))
1455 next->cctx = cctx_get (aTHX);
1456
1457 cctx_put (cctx_current);
1458 }
1459 else
1460 prev->cctx = cctx_current;
1461
1462 ++next->usecount;
1463
1464 cctx_prev = cctx_current;
1465 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1466
1467 next->cctx = 0;
1468
1469 if (expect_false (cctx_prev != cctx_current))
1470 {
1471 cctx_prev->top_env = PL_top_env;
1472 PL_top_env = cctx_current->top_env;
1473 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1474 }
1475
1476 transfer_tail (aTHX);
1477 }
1478}
1479
1480#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1481#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1482
1483/** high level stuff ********************************************************/
1484
1485static int
1486coro_state_destroy (pTHX_ struct coro *coro)
1487{
1488 if (coro->flags & CF_DESTROYED)
1489 return 0;
1490
1491 if (coro->on_destroy)
1492 coro->on_destroy (aTHX_ coro);
1493
1494 coro->flags |= CF_DESTROYED;
1495
1496 if (coro->flags & CF_READY)
1497 {
1498 /* reduce nready, as destroying a ready coro effectively unreadies it */
1499 /* alternative: look through all ready queues and remove the coro */
1500 --coro_nready;
1501 }
1502 else
1503 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1504
1505 if (coro->mainstack
1506 && coro->mainstack != main_mainstack
1507 && coro->slot
1508 && !PL_dirty)
1509 {
1510 struct coro *current = SvSTATE_current;
1511
1512 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1513
1514 save_perl (aTHX_ current);
1515 load_perl (aTHX_ coro);
1516
1517 coro_destruct_perl (aTHX_ coro);
1518
1519 load_perl (aTHX_ current);
1520
1521 coro->slot = 0;
1522 }
1523
1524 cctx_destroy (coro->cctx);
1525 SvREFCNT_dec (coro->startcv);
1526 SvREFCNT_dec (coro->args);
1527 SvREFCNT_dec (CORO_THROW);
1528
1529 if (coro->next) coro->next->prev = coro->prev;
1530 if (coro->prev) coro->prev->next = coro->next;
1531 if (coro == coro_first) coro_first = coro->next;
1532
1533 return 1;
1534}
1535
1536static int
1537coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1538{
1539 struct coro *coro = (struct coro *)mg->mg_ptr;
1540 mg->mg_ptr = 0;
1541
1542 coro->hv = 0;
1543
1544 if (--coro->refcnt < 0)
1545 {
1546 coro_state_destroy (aTHX_ coro);
1547 Safefree (coro);
1548 }
1549
1550 return 0;
1551}
1552
1553static int
1554coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1555{
1556 struct coro *coro = (struct coro *)mg->mg_ptr;
1557
1558 ++coro->refcnt;
1559
1560 return 0;
1561}
1562
1563static MGVTBL coro_state_vtbl = {
1564 0, 0, 0, 0,
1565 coro_state_free,
1566 0,
1567#ifdef MGf_DUP
1568 coro_state_dup,
1569#else
1570# define MGf_DUP 0
1571#endif
1572};
1573
1574static void
1575prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1576{
1577 ta->prev = SvSTATE (prev_sv);
1578 ta->next = SvSTATE (next_sv);
1579 TRANSFER_CHECK (*ta);
1580}
1581
1582static void
1583api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1584{
1585 struct coro_transfer_args ta;
1586
1587 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1588 TRANSFER (ta, 1);
1589}
1590
1591/*****************************************************************************/
1592/* gensub: simple closure generation utility */
1593
1594#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1595
1596/* create a closure from XS, returns a code reference */
1597/* the arg can be accessed via GENSUB_ARG from the callback */
1598/* the callback must use dXSARGS/XSRETURN */
1599static SV *
1600gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1601{
1602 CV *cv = (CV *)newSV (0);
1603
1604 sv_upgrade ((SV *)cv, SVt_PVCV);
1605
1606 CvANON_on (cv);
1607 CvISXSUB_on (cv);
1608 CvXSUB (cv) = xsub;
1609 GENSUB_ARG = arg;
1610
1611 return newRV_noinc ((SV *)cv);
1612}
1613
1614/** Coro ********************************************************************/
1615
1616INLINE void
1617coro_enq (pTHX_ struct coro *coro)
1618{
1619 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1620}
1621
1622INLINE SV *
1623coro_deq (pTHX)
1624{
1625 int prio;
1626
1627 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1628 if (AvFILLp (coro_ready [prio]) >= 0)
1629 return av_shift (coro_ready [prio]);
1630
1631 return 0;
1632}
1633
1634static int
1635api_ready (pTHX_ SV *coro_sv)
1636{
1637 struct coro *coro;
1638 SV *sv_hook;
1639 void (*xs_hook)(void);
1640
1641 coro = SvSTATE (coro_sv);
1642
1643 if (coro->flags & CF_READY)
1644 return 0;
1645
1646 coro->flags |= CF_READY;
1647
1648 sv_hook = coro_nready ? 0 : coro_readyhook;
1649 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1650
1651 coro_enq (aTHX_ coro);
1652 ++coro_nready;
1653
1654 if (sv_hook)
1655 {
1656 dSP;
1657
1658 ENTER;
1659 SAVETMPS;
1660
1661 PUSHMARK (SP);
1662 PUTBACK;
1663 call_sv (sv_hook, G_VOID | G_DISCARD);
1664
1665 FREETMPS;
1666 LEAVE;
1667 }
1668
1669 if (xs_hook)
1670 xs_hook ();
1671
1672 return 1;
1673}
1674
1675static int
1676api_is_ready (pTHX_ SV *coro_sv)
1677{
1678 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1679}
1680
1681/* expects to own a reference to next->hv */
1682INLINE void
1683prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1684{
897 prev = SvRV (GvSV (coro_current)); 1685 SV *prev_sv = SvRV (coro_current);
898 next = coro_deq (PRIO_MIN);
899 1686
900 if (!next) 1687 ta->prev = SvSTATE_hv (prev_sv);
901 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1688 ta->next = next;
902 1689
903 /* free this only after the transfer */ 1690 TRANSFER_CHECK (*ta);
1691
1692 SvRV_set (coro_current, (SV *)next->hv);
1693
1694 free_coro_mortal (aTHX);
904 coro_mortal = prev; 1695 coro_mortal = prev_sv;
905 SV_CORO (prev, "Coro::schedule");
906
907 SvRV (GvSV (coro_current)) = next;
908
909 SV_CORO (next, "Coro::schedule");
910
911 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
913} 1696}
914 1697
915static void 1698static void
916api_cede (void) 1699prepare_schedule (pTHX_ struct coro_transfer_args *ta)
917{ 1700{
918 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1701 for (;;)
1702 {
1703 SV *next_sv = coro_deq (aTHX);
919 1704
1705 if (expect_true (next_sv))
1706 {
1707 struct coro *next = SvSTATE_hv (next_sv);
1708
1709 /* cannot transfer to destroyed coros, skip and look for next */
1710 if (expect_false (next->flags & CF_DESTROYED))
1711 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1712 else
1713 {
1714 next->flags &= ~CF_READY;
1715 --coro_nready;
1716
1717 prepare_schedule_to (aTHX_ ta, next);
1718 break;
1719 }
1720 }
1721 else
1722 {
1723 /* nothing to schedule: call the idle handler */
1724 if (SvROK (sv_idle)
1725 && SvOBJECT (SvRV (sv_idle)))
1726 {
1727 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1728 api_ready (aTHX_ SvRV (sv_idle));
1729 --coro_nready;
1730 }
1731 else
1732 {
1733 dSP;
1734
1735 ENTER;
1736 SAVETMPS;
1737
1738 PUSHMARK (SP);
1739 PUTBACK;
1740 call_sv (sv_idle, G_VOID | G_DISCARD);
1741
1742 FREETMPS;
1743 LEAVE;
1744 }
1745 }
1746 }
1747}
1748
1749INLINE void
1750prepare_cede (pTHX_ struct coro_transfer_args *ta)
1751{
1752 api_ready (aTHX_ coro_current);
1753 prepare_schedule (aTHX_ ta);
1754}
1755
1756INLINE void
1757prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1758{
1759 SV *prev = SvRV (coro_current);
1760
1761 if (coro_nready)
1762 {
1763 prepare_schedule (aTHX_ ta);
1764 api_ready (aTHX_ prev);
1765 }
1766 else
1767 prepare_nop (aTHX_ ta);
1768}
1769
1770static void
920 api_schedule (); 1771api_schedule (pTHX)
921} 1772{
1773 struct coro_transfer_args ta;
922 1774
1775 prepare_schedule (aTHX_ &ta);
1776 TRANSFER (ta, 1);
1777}
1778
1779static void
1780api_schedule_to (pTHX_ SV *coro_sv)
1781{
1782 struct coro_transfer_args ta;
1783 struct coro *next = SvSTATE (coro_sv);
1784
1785 SvREFCNT_inc_NN (coro_sv);
1786 prepare_schedule_to (aTHX_ &ta, next);
1787}
1788
1789static int
1790api_cede (pTHX)
1791{
1792 struct coro_transfer_args ta;
1793
1794 prepare_cede (aTHX_ &ta);
1795
1796 if (expect_true (ta.prev != ta.next))
1797 {
1798 TRANSFER (ta, 1);
1799 return 1;
1800 }
1801 else
1802 return 0;
1803}
1804
1805static int
1806api_cede_notself (pTHX)
1807{
1808 if (coro_nready)
1809 {
1810 struct coro_transfer_args ta;
1811
1812 prepare_cede_notself (aTHX_ &ta);
1813 TRANSFER (ta, 1);
1814 return 1;
1815 }
1816 else
1817 return 0;
1818}
1819
1820static void
1821api_trace (pTHX_ SV *coro_sv, int flags)
1822{
1823 struct coro *coro = SvSTATE (coro_sv);
1824
1825 if (coro->flags & CF_RUNNING)
1826 croak ("cannot enable tracing on a running coroutine, caught");
1827
1828 if (flags & CC_TRACE)
1829 {
1830 if (!coro->cctx)
1831 coro->cctx = cctx_new_run ();
1832 else if (!(coro->cctx->flags & CC_TRACE))
1833 croak ("cannot enable tracing on coroutine with custom stack, caught");
1834
1835 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1836 }
1837 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1838 {
1839 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1840
1841 if (coro->flags & CF_RUNNING)
1842 PL_runops = RUNOPS_DEFAULT;
1843 else
1844 coro->slot->runops = RUNOPS_DEFAULT;
1845 }
1846}
1847
1848static void
1849coro_call_on_destroy (pTHX_ struct coro *coro)
1850{
1851 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1852 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1853
1854 if (on_destroyp)
1855 {
1856 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1857
1858 while (AvFILLp (on_destroy) >= 0)
1859 {
1860 dSP; /* don't disturb outer sp */
1861 SV *cb = av_pop (on_destroy);
1862
1863 PUSHMARK (SP);
1864
1865 if (statusp)
1866 {
1867 int i;
1868 AV *status = (AV *)SvRV (*statusp);
1869 EXTEND (SP, AvFILLp (status) + 1);
1870
1871 for (i = 0; i <= AvFILLp (status); ++i)
1872 PUSHs (AvARRAY (status)[i]);
1873 }
1874
1875 PUTBACK;
1876 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1877 }
1878 }
1879}
1880
1881static void
1882slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1883{
1884 int i;
1885 HV *hv = (HV *)SvRV (coro_current);
1886 AV *av = newAV ();
1887
1888 av_extend (av, items - 1);
1889 for (i = 0; i < items; ++i)
1890 av_push (av, SvREFCNT_inc_NN (arg [i]));
1891
1892 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1893
1894 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1895 api_ready (aTHX_ sv_manager);
1896
1897 frame->prepare = prepare_schedule;
1898 frame->check = slf_check_repeat;
1899
1900 /* as a minor optimisation, we could unwind all stacks here */
1901 /* but that puts extra pressure on pp_slf, and is not worth much */
1902 /*coro_unwind_stacks (aTHX);*/
1903}
1904
1905/*****************************************************************************/
1906/* async pool handler */
1907
1908static int
1909slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1910{
1911 HV *hv = (HV *)SvRV (coro_current);
1912 struct coro *coro = (struct coro *)frame->data;
1913
1914 if (!coro->invoke_cb)
1915 return 1; /* loop till we have invoke */
1916 else
1917 {
1918 hv_store (hv, "desc", sizeof ("desc") - 1,
1919 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1920
1921 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1922
1923 {
1924 dSP;
1925 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1926 PUTBACK;
1927 }
1928
1929 SvREFCNT_dec (GvAV (PL_defgv));
1930 GvAV (PL_defgv) = coro->invoke_av;
1931 coro->invoke_av = 0;
1932
1933 return 0;
1934 }
1935}
1936
1937static void
1938slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1939{
1940 HV *hv = (HV *)SvRV (coro_current);
1941 struct coro *coro = SvSTATE_hv ((SV *)hv);
1942
1943 if (expect_true (coro->saved_deffh))
1944 {
1945 /* subsequent iteration */
1946 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1947 coro->saved_deffh = 0;
1948
1949 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1950 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1951 {
1952 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1953 coro->invoke_av = newAV ();
1954
1955 frame->prepare = prepare_nop;
1956 }
1957 else
1958 {
1959 av_clear (GvAV (PL_defgv));
1960 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1961
1962 coro->prio = 0;
1963
1964 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1965 api_trace (aTHX_ coro_current, 0);
1966
1967 frame->prepare = prepare_schedule;
1968 av_push (av_async_pool, SvREFCNT_inc (hv));
1969 }
1970 }
1971 else
1972 {
1973 /* first iteration, simply fall through */
1974 frame->prepare = prepare_nop;
1975 }
1976
1977 frame->check = slf_check_pool_handler;
1978 frame->data = (void *)coro;
1979}
1980
1981/*****************************************************************************/
1982/* rouse callback */
1983
1984#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1985
1986static void
1987coro_rouse_callback (pTHX_ CV *cv)
1988{
1989 dXSARGS;
1990 SV *data = (SV *)GENSUB_ARG;
1991
1992 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1993 {
1994 /* first call, set args */
1995 AV *av = newAV ();
1996 SV *coro = SvRV (data);
1997
1998 SvRV_set (data, (SV *)av);
1999 api_ready (aTHX_ coro);
2000 SvREFCNT_dec (coro);
2001
2002 /* better take a full copy of the arguments */
2003 while (items--)
2004 av_store (av, items, newSVsv (ST (items)));
2005 }
2006
2007 XSRETURN_EMPTY;
2008}
2009
2010static int
2011slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2012{
2013 SV *data = (SV *)frame->data;
2014
2015 if (CORO_THROW)
2016 return 0;
2017
2018 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2019 return 1;
2020
2021 /* now push all results on the stack */
2022 {
2023 dSP;
2024 AV *av = (AV *)SvRV (data);
2025 int i;
2026
2027 EXTEND (SP, AvFILLp (av) + 1);
2028 for (i = 0; i <= AvFILLp (av); ++i)
2029 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2030
2031 /* we have stolen the elements, so ste length to zero and free */
2032 AvFILLp (av) = -1;
2033 av_undef (av);
2034
2035 PUTBACK;
2036 }
2037
2038 return 0;
2039}
2040
2041static void
2042slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2043{
2044 SV *cb;
2045
2046 if (items)
2047 cb = arg [0];
2048 else
2049 {
2050 struct coro *coro = SvSTATE_current;
2051
2052 if (!coro->rouse_cb)
2053 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2054
2055 cb = sv_2mortal (coro->rouse_cb);
2056 coro->rouse_cb = 0;
2057 }
2058
2059 if (!SvROK (cb)
2060 || SvTYPE (SvRV (cb)) != SVt_PVCV
2061 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2062 croak ("Coro::rouse_wait called with illegal callback argument,");
2063
2064 {
2065 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2066 SV *data = (SV *)GENSUB_ARG;
2067
2068 frame->data = (void *)data;
2069 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2070 frame->check = slf_check_rouse_wait;
2071 }
2072}
2073
2074static SV *
2075coro_new_rouse_cb (pTHX)
2076{
2077 HV *hv = (HV *)SvRV (coro_current);
2078 struct coro *coro = SvSTATE_hv (hv);
2079 SV *data = newRV_inc ((SV *)hv);
2080 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2081
2082 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2083 SvREFCNT_dec (data); /* magicext increases the refcount */
2084
2085 SvREFCNT_dec (coro->rouse_cb);
2086 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2087
2088 return cb;
2089}
2090
2091/*****************************************************************************/
2092/* schedule-like-function opcode (SLF) */
2093
2094static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2095static const CV *slf_cv;
2096static SV **slf_argv;
2097static int slf_argc, slf_arga; /* count, allocated */
2098static I32 slf_ax; /* top of stack, for restore */
2099
2100/* this restores the stack in the case we patched the entersub, to */
2101/* recreate the stack frame as perl will on following calls */
2102/* since entersub cleared the stack */
2103static OP *
2104pp_restore (pTHX)
2105{
2106 int i;
2107 SV **SP = PL_stack_base + slf_ax;
2108
2109 PUSHMARK (SP);
2110
2111 EXTEND (SP, slf_argc + 1);
2112
2113 for (i = 0; i < slf_argc; ++i)
2114 PUSHs (sv_2mortal (slf_argv [i]));
2115
2116 PUSHs ((SV *)CvGV (slf_cv));
2117
2118 RETURNOP (slf_restore.op_first);
2119}
2120
2121static void
2122slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2123{
2124 SV **arg = (SV **)slf_frame.data;
2125
2126 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2127}
2128
2129static void
2130slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2131{
2132 if (items != 2)
2133 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2134
2135 frame->prepare = slf_prepare_transfer;
2136 frame->check = slf_check_nop;
2137 frame->data = (void *)arg; /* let's hope it will stay valid */
2138}
2139
2140static void
2141slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2142{
2143 frame->prepare = prepare_schedule;
2144 frame->check = slf_check_nop;
2145}
2146
2147static void
2148slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2149{
2150 struct coro *next = (struct coro *)slf_frame.data;
2151
2152 SvREFCNT_inc_NN (next->hv);
2153 prepare_schedule_to (aTHX_ ta, next);
2154}
2155
2156static void
2157slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2158{
2159 if (!items)
2160 croak ("Coro::schedule_to expects a coroutine argument, caught");
2161
2162 frame->data = (void *)SvSTATE (arg [0]);
2163 frame->prepare = slf_prepare_schedule_to;
2164 frame->check = slf_check_nop;
2165}
2166
2167static void
2168slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2169{
2170 api_ready (aTHX_ SvRV (coro_current));
2171
2172 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2173}
2174
2175static void
2176slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2177{
2178 frame->prepare = prepare_cede;
2179 frame->check = slf_check_nop;
2180}
2181
2182static void
2183slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 frame->prepare = prepare_cede_notself;
2186 frame->check = slf_check_nop;
2187}
2188
2189/*
2190 * these not obviously related functions are all rolled into one
2191 * function to increase chances that they all will call transfer with the same
2192 * stack offset
2193 * SLF stands for "schedule-like-function".
2194 */
2195static OP *
2196pp_slf (pTHX)
2197{
2198 I32 checkmark; /* mark SP to see how many elements check has pushed */
2199
2200 /* set up the slf frame, unless it has already been set-up */
2201 /* the latter happens when a new coro has been started */
2202 /* or when a new cctx was attached to an existing coroutine */
2203 if (expect_true (!slf_frame.prepare))
2204 {
2205 /* first iteration */
2206 dSP;
2207 SV **arg = PL_stack_base + TOPMARK + 1;
2208 int items = SP - arg; /* args without function object */
2209 SV *gv = *sp;
2210
2211 /* do a quick consistency check on the "function" object, and if it isn't */
2212 /* for us, divert to the real entersub */
2213 if (SvTYPE (gv) != SVt_PVGV
2214 || !GvCV (gv)
2215 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2216 return PL_ppaddr[OP_ENTERSUB](aTHX);
2217
2218 if (!(PL_op->op_flags & OPf_STACKED))
2219 {
2220 /* ampersand-form of call, use @_ instead of stack */
2221 AV *av = GvAV (PL_defgv);
2222 arg = AvARRAY (av);
2223 items = AvFILLp (av) + 1;
2224 }
2225
2226 /* now call the init function, which needs to set up slf_frame */
2227 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2228 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2229
2230 /* pop args */
2231 SP = PL_stack_base + POPMARK;
2232
2233 PUTBACK;
2234 }
2235
2236 /* now that we have a slf_frame, interpret it! */
2237 /* we use a callback system not to make the code needlessly */
2238 /* complicated, but so we can run multiple perl coros from one cctx */
2239
2240 do
2241 {
2242 struct coro_transfer_args ta;
2243
2244 slf_frame.prepare (aTHX_ &ta);
2245 TRANSFER (ta, 0);
2246
2247 checkmark = PL_stack_sp - PL_stack_base;
2248 }
2249 while (slf_frame.check (aTHX_ &slf_frame));
2250
2251 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2252
2253 /* exception handling */
2254 if (expect_false (CORO_THROW))
2255 {
2256 SV *exception = sv_2mortal (CORO_THROW);
2257
2258 CORO_THROW = 0;
2259 sv_setsv (ERRSV, exception);
2260 croak (0);
2261 }
2262
2263 /* return value handling - mostly like entersub */
2264 /* make sure we put something on the stack in scalar context */
2265 if (GIMME_V == G_SCALAR)
2266 {
2267 dSP;
2268 SV **bot = PL_stack_base + checkmark;
2269
2270 if (sp == bot) /* too few, push undef */
2271 bot [1] = &PL_sv_undef;
2272 else if (sp != bot + 1) /* too many, take last one */
2273 bot [1] = *sp;
2274
2275 SP = bot + 1;
2276
2277 PUTBACK;
2278 }
2279
2280 return NORMAL;
2281}
2282
2283static void
2284api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2285{
2286 int i;
2287 SV **arg = PL_stack_base + ax;
2288 int items = PL_stack_sp - arg + 1;
2289
2290 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2291
2292 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2293 && PL_op->op_ppaddr != pp_slf)
2294 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2295
2296 CvFLAGS (cv) |= CVf_SLF;
2297 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2298 slf_cv = cv;
2299
2300 /* we patch the op, and then re-run the whole call */
2301 /* we have to put the same argument on the stack for this to work */
2302 /* and this will be done by pp_restore */
2303 slf_restore.op_next = (OP *)&slf_restore;
2304 slf_restore.op_type = OP_CUSTOM;
2305 slf_restore.op_ppaddr = pp_restore;
2306 slf_restore.op_first = PL_op;
2307
2308 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2309
2310 if (PL_op->op_flags & OPf_STACKED)
2311 {
2312 if (items > slf_arga)
2313 {
2314 slf_arga = items;
2315 free (slf_argv);
2316 slf_argv = malloc (slf_arga * sizeof (SV *));
2317 }
2318
2319 slf_argc = items;
2320
2321 for (i = 0; i < items; ++i)
2322 slf_argv [i] = SvREFCNT_inc (arg [i]);
2323 }
2324 else
2325 slf_argc = 0;
2326
2327 PL_op->op_ppaddr = pp_slf;
2328 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2329
2330 PL_op = (OP *)&slf_restore;
2331}
2332
2333/*****************************************************************************/
2334/* dynamic wind */
2335
2336static void
2337on_enterleave_call (pTHX_ SV *cb)
2338{
2339 dSP;
2340
2341 PUSHSTACK;
2342
2343 PUSHMARK (SP);
2344 PUTBACK;
2345 call_sv (cb, G_VOID | G_DISCARD);
2346 SPAGAIN;
2347
2348 POPSTACK;
2349}
2350
2351static SV *
2352coro_avp_pop_and_free (pTHX_ AV **avp)
2353{
2354 AV *av = *avp;
2355 SV *res = av_pop (av);
2356
2357 if (AvFILLp (av) < 0)
2358 {
2359 *avp = 0;
2360 SvREFCNT_dec (av);
2361 }
2362
2363 return res;
2364}
2365
2366static void
2367coro_pop_on_enter (pTHX_ void *coro)
2368{
2369 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2370 SvREFCNT_dec (cb);
2371}
2372
2373static void
2374coro_pop_on_leave (pTHX_ void *coro)
2375{
2376 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2377 on_enterleave_call (aTHX_ sv_2mortal (cb));
2378}
2379
2380/*****************************************************************************/
2381/* PerlIO::cede */
2382
2383typedef struct
2384{
2385 PerlIOBuf base;
2386 NV next, every;
2387} PerlIOCede;
2388
2389static IV
2390PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2391{
2392 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2393
2394 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2395 self->next = nvtime () + self->every;
2396
2397 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2398}
2399
2400static SV *
2401PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2402{
2403 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2404
2405 return newSVnv (self->every);
2406}
2407
2408static IV
2409PerlIOCede_flush (pTHX_ PerlIO *f)
2410{
2411 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2412 double now = nvtime ();
2413
2414 if (now >= self->next)
2415 {
2416 api_cede (aTHX);
2417 self->next = now + self->every;
2418 }
2419
2420 return PerlIOBuf_flush (aTHX_ f);
2421}
2422
2423static PerlIO_funcs PerlIO_cede =
2424{
2425 sizeof(PerlIO_funcs),
2426 "cede",
2427 sizeof(PerlIOCede),
2428 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2429 PerlIOCede_pushed,
2430 PerlIOBuf_popped,
2431 PerlIOBuf_open,
2432 PerlIOBase_binmode,
2433 PerlIOCede_getarg,
2434 PerlIOBase_fileno,
2435 PerlIOBuf_dup,
2436 PerlIOBuf_read,
2437 PerlIOBuf_unread,
2438 PerlIOBuf_write,
2439 PerlIOBuf_seek,
2440 PerlIOBuf_tell,
2441 PerlIOBuf_close,
2442 PerlIOCede_flush,
2443 PerlIOBuf_fill,
2444 PerlIOBase_eof,
2445 PerlIOBase_error,
2446 PerlIOBase_clearerr,
2447 PerlIOBase_setlinebuf,
2448 PerlIOBuf_get_base,
2449 PerlIOBuf_bufsiz,
2450 PerlIOBuf_get_ptr,
2451 PerlIOBuf_get_cnt,
2452 PerlIOBuf_set_ptrcnt,
2453};
2454
2455/*****************************************************************************/
2456/* Coro::Semaphore & Coro::Signal */
2457
2458static SV *
2459coro_waitarray_new (pTHX_ int count)
2460{
2461 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2462 AV *av = newAV ();
2463 SV **ary;
2464
2465 /* unfortunately, building manually saves memory */
2466 Newx (ary, 2, SV *);
2467 AvALLOC (av) = ary;
2468#if PERL_VERSION_ATLEAST (5,10,0)
2469 AvARRAY (av) = ary;
2470#else
2471 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2472 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2473 SvPVX ((SV *)av) = (char *)ary;
2474#endif
2475 AvMAX (av) = 1;
2476 AvFILLp (av) = 0;
2477 ary [0] = newSViv (count);
2478
2479 return newRV_noinc ((SV *)av);
2480}
2481
2482/* semaphore */
2483
2484static void
2485coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2486{
2487 SV *count_sv = AvARRAY (av)[0];
2488 IV count = SvIVX (count_sv);
2489
2490 count += adjust;
2491 SvIVX (count_sv) = count;
2492
2493 /* now wake up as many waiters as are expected to lock */
2494 while (count > 0 && AvFILLp (av) > 0)
2495 {
2496 SV *cb;
2497
2498 /* swap first two elements so we can shift a waiter */
2499 AvARRAY (av)[0] = AvARRAY (av)[1];
2500 AvARRAY (av)[1] = count_sv;
2501 cb = av_shift (av);
2502
2503 if (SvOBJECT (cb))
2504 {
2505 api_ready (aTHX_ cb);
2506 --count;
2507 }
2508 else if (SvTYPE (cb) == SVt_PVCV)
2509 {
2510 dSP;
2511 PUSHMARK (SP);
2512 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2513 PUTBACK;
2514 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2515 }
2516
2517 SvREFCNT_dec (cb);
2518 }
2519}
2520
2521static void
2522coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2523{
2524 /* call $sem->adjust (0) to possibly wake up some other waiters */
2525 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2526}
2527
2528static int
2529slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2530{
2531 AV *av = (AV *)frame->data;
2532 SV *count_sv = AvARRAY (av)[0];
2533
2534 /* if we are about to throw, don't actually acquire the lock, just throw */
2535 if (CORO_THROW)
2536 return 0;
2537 else if (SvIVX (count_sv) > 0)
2538 {
2539 SvSTATE_current->on_destroy = 0;
2540
2541 if (acquire)
2542 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2543 else
2544 coro_semaphore_adjust (aTHX_ av, 0);
2545
2546 return 0;
2547 }
2548 else
2549 {
2550 int i;
2551 /* if we were woken up but can't down, we look through the whole */
2552 /* waiters list and only add us if we aren't in there already */
2553 /* this avoids some degenerate memory usage cases */
2554
2555 for (i = 1; i <= AvFILLp (av); ++i)
2556 if (AvARRAY (av)[i] == SvRV (coro_current))
2557 return 1;
2558
2559 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2560 return 1;
2561 }
2562}
2563
2564static int
2565slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2566{
2567 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2568}
2569
2570static int
2571slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2572{
2573 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2574}
2575
2576static void
2577slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2578{
2579 AV *av = (AV *)SvRV (arg [0]);
2580
2581 if (SvIVX (AvARRAY (av)[0]) > 0)
2582 {
2583 frame->data = (void *)av;
2584 frame->prepare = prepare_nop;
2585 }
2586 else
2587 {
2588 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2589
2590 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2591 frame->prepare = prepare_schedule;
2592
2593 /* to avoid race conditions when a woken-up coro gets terminated */
2594 /* we arrange for a temporary on_destroy that calls adjust (0) */
2595 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2596 }
2597}
2598
2599static void
2600slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2601{
2602 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2603 frame->check = slf_check_semaphore_down;
2604}
2605
2606static void
2607slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2608{
2609 if (items >= 2)
2610 {
2611 /* callback form */
2612 AV *av = (AV *)SvRV (arg [0]);
2613 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2614
2615 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2616
2617 if (SvIVX (AvARRAY (av)[0]) > 0)
2618 coro_semaphore_adjust (aTHX_ av, 0);
2619
2620 frame->prepare = prepare_nop;
2621 frame->check = slf_check_nop;
2622 }
2623 else
2624 {
2625 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2626 frame->check = slf_check_semaphore_wait;
2627 }
2628}
2629
2630/* signal */
2631
2632static void
2633coro_signal_wake (pTHX_ AV *av, int count)
2634{
2635 SvIVX (AvARRAY (av)[0]) = 0;
2636
2637 /* now signal count waiters */
2638 while (count > 0 && AvFILLp (av) > 0)
2639 {
2640 SV *cb;
2641
2642 /* swap first two elements so we can shift a waiter */
2643 cb = AvARRAY (av)[0];
2644 AvARRAY (av)[0] = AvARRAY (av)[1];
2645 AvARRAY (av)[1] = cb;
2646
2647 cb = av_shift (av);
2648
2649 api_ready (aTHX_ cb);
2650 sv_setiv (cb, 0); /* signal waiter */
2651 SvREFCNT_dec (cb);
2652
2653 --count;
2654 }
2655}
2656
2657static int
2658slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2659{
2660 /* if we are about to throw, also stop waiting */
2661 return SvROK ((SV *)frame->data) && !CORO_THROW;
2662}
2663
2664static void
2665slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 AV *av = (AV *)SvRV (arg [0]);
2668
2669 if (SvIVX (AvARRAY (av)[0]))
2670 {
2671 SvIVX (AvARRAY (av)[0]) = 0;
2672 frame->prepare = prepare_nop;
2673 frame->check = slf_check_nop;
2674 }
2675 else
2676 {
2677 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2678
2679 av_push (av, waiter);
2680
2681 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2682 frame->prepare = prepare_schedule;
2683 frame->check = slf_check_signal_wait;
2684 }
2685}
2686
2687/*****************************************************************************/
2688/* Coro::AIO */
2689
2690#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2691
2692/* helper storage struct */
2693struct io_state
2694{
2695 int errorno;
2696 I32 laststype; /* U16 in 5.10.0 */
2697 int laststatval;
2698 Stat_t statcache;
2699};
2700
2701static void
2702coro_aio_callback (pTHX_ CV *cv)
2703{
2704 dXSARGS;
2705 AV *state = (AV *)GENSUB_ARG;
2706 SV *coro = av_pop (state);
2707 SV *data_sv = newSV (sizeof (struct io_state));
2708
2709 av_extend (state, items - 1);
2710
2711 sv_upgrade (data_sv, SVt_PV);
2712 SvCUR_set (data_sv, sizeof (struct io_state));
2713 SvPOK_only (data_sv);
2714
2715 {
2716 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2717
2718 data->errorno = errno;
2719 data->laststype = PL_laststype;
2720 data->laststatval = PL_laststatval;
2721 data->statcache = PL_statcache;
2722 }
2723
2724 /* now build the result vector out of all the parameters and the data_sv */
2725 {
2726 int i;
2727
2728 for (i = 0; i < items; ++i)
2729 av_push (state, SvREFCNT_inc_NN (ST (i)));
2730 }
2731
2732 av_push (state, data_sv);
2733
2734 api_ready (aTHX_ coro);
2735 SvREFCNT_dec (coro);
2736 SvREFCNT_dec ((AV *)state);
2737}
2738
2739static int
2740slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2741{
2742 AV *state = (AV *)frame->data;
2743
2744 /* if we are about to throw, return early */
2745 /* this does not cancel the aio request, but at least */
2746 /* it quickly returns */
2747 if (CORO_THROW)
2748 return 0;
2749
2750 /* one element that is an RV? repeat! */
2751 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2752 return 1;
2753
2754 /* restore status */
2755 {
2756 SV *data_sv = av_pop (state);
2757 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2758
2759 errno = data->errorno;
2760 PL_laststype = data->laststype;
2761 PL_laststatval = data->laststatval;
2762 PL_statcache = data->statcache;
2763
2764 SvREFCNT_dec (data_sv);
2765 }
2766
2767 /* push result values */
2768 {
2769 dSP;
2770 int i;
2771
2772 EXTEND (SP, AvFILLp (state) + 1);
2773 for (i = 0; i <= AvFILLp (state); ++i)
2774 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2775
2776 PUTBACK;
2777 }
2778
2779 return 0;
2780}
2781
2782static void
2783slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2784{
2785 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2786 SV *coro_hv = SvRV (coro_current);
2787 struct coro *coro = SvSTATE_hv (coro_hv);
2788
2789 /* put our coroutine id on the state arg */
2790 av_push (state, SvREFCNT_inc_NN (coro_hv));
2791
2792 /* first see whether we have a non-zero priority and set it as AIO prio */
2793 if (coro->prio)
2794 {
2795 dSP;
2796
2797 static SV *prio_cv;
2798 static SV *prio_sv;
2799
2800 if (expect_false (!prio_cv))
2801 {
2802 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2803 prio_sv = newSViv (0);
2804 }
2805
2806 PUSHMARK (SP);
2807 sv_setiv (prio_sv, coro->prio);
2808 XPUSHs (prio_sv);
2809
2810 PUTBACK;
2811 call_sv (prio_cv, G_VOID | G_DISCARD);
2812 }
2813
2814 /* now call the original request */
2815 {
2816 dSP;
2817 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2818 int i;
2819
2820 PUSHMARK (SP);
2821
2822 /* first push all args to the stack */
2823 EXTEND (SP, items + 1);
2824
2825 for (i = 0; i < items; ++i)
2826 PUSHs (arg [i]);
2827
2828 /* now push the callback closure */
2829 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2830
2831 /* now call the AIO function - we assume our request is uncancelable */
2832 PUTBACK;
2833 call_sv ((SV *)req, G_VOID | G_DISCARD);
2834 }
2835
2836 /* now that the requets is going, we loop toll we have a result */
2837 frame->data = (void *)state;
2838 frame->prepare = prepare_schedule;
2839 frame->check = slf_check_aio_req;
2840}
2841
2842static void
2843coro_aio_req_xs (pTHX_ CV *cv)
2844{
2845 dXSARGS;
2846
2847 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2848
2849 XSRETURN_EMPTY;
2850}
2851
2852/*****************************************************************************/
2853
2854#if CORO_CLONE
2855# include "clone.c"
2856#endif
2857
923MODULE = Coro::State PACKAGE = Coro::State 2858MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
924 2859
925PROTOTYPES: ENABLE 2860PROTOTYPES: DISABLE
926 2861
927BOOT: 2862BOOT:
928{ /* {} necessary for stoopid perl-5.6.x */ 2863{
929 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2864#ifdef USE_ITHREADS
930 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2865# if CORO_PTHREAD
2866 coro_thx = PERL_GET_CONTEXT;
2867# endif
2868#endif
2869 BOOT_PAGESIZE;
2870
2871 cctx_current = cctx_new_empty ();
2872
2873 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2874 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2875
2876 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2877 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2878 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2879
2880 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2881 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2882 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2883
931 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2884 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932 2885
933 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2886 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
934 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2887 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
935 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2888 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
936 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2889 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
937
938 if (!padlist_cache)
939 padlist_cache = newHV ();
940 2890
941 main_mainstack = PL_mainstack; 2891 main_mainstack = PL_mainstack;
2892 main_top_env = PL_top_env;
942 2893
2894 while (main_top_env->je_prev)
2895 main_top_env = main_top_env->je_prev;
2896
2897 {
2898 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2899
2900 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2901 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2902
2903 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2904 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2905 }
2906
943 coroapi.ver = CORO_API_VERSION; 2907 coroapi.ver = CORO_API_VERSION;
2908 coroapi.rev = CORO_API_REVISION;
2909
944 coroapi.transfer = api_transfer; 2910 coroapi.transfer = api_transfer;
945}
946 2911
947Coro::State 2912 coroapi.sv_state = SvSTATE_;
948_newprocess(args) 2913 coroapi.execute_slf = api_execute_slf;
949 SV * args 2914 coroapi.prepare_nop = prepare_nop;
950 PROTOTYPE: $ 2915 coroapi.prepare_schedule = prepare_schedule;
2916 coroapi.prepare_cede = prepare_cede;
2917 coroapi.prepare_cede_notself = prepare_cede_notself;
2918
2919 {
2920 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2921
2922 if (!svp) croak ("Time::HiRes is required");
2923 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2924
2925 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2926 }
2927
2928 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2929}
2930
2931SV *
2932new (char *klass, ...)
2933 ALIAS:
2934 Coro::new = 1
951 CODE: 2935 CODE:
952 Coro__State coro; 2936{
2937 struct coro *coro;
2938 MAGIC *mg;
2939 HV *hv;
2940 CV *cb;
2941 int i;
953 2942
954 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2943 if (items > 1)
955 croak ("Coro::State::_newprocess expects an arrayref");
956 2944 {
2945 cb = coro_sv_2cv (aTHX_ ST (1));
2946
2947 if (!ix)
2948 {
2949 if (CvISXSUB (cb))
2950 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2951
2952 if (!CvROOT (cb))
2953 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2954 }
2955 }
2956
957 New (0, coro, 1, struct coro); 2957 Newz (0, coro, 1, struct coro);
2958 coro->args = newAV ();
2959 coro->flags = CF_NEW;
958 2960
959 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2961 if (coro_first) coro_first->prev = coro;
960 coro->mainstack = 0; /* actual work is done inside transfer */ 2962 coro->next = coro_first;
961 coro->stack = 0; 2963 coro_first = coro;
962 2964
963 /* same as JMPENV_BOOTSTRAP */ 2965 coro->hv = hv = newHV ();
964 /* we might be able to recycle start_env, but safe is safe */ 2966 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
965 Zero(&coro->start_env, 1, JMPENV); 2967 mg->mg_flags |= MGf_DUP;
966 coro->start_env.je_ret = -1; 2968 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
967 coro->start_env.je_mustcatch = TRUE;
968 2969
969 RETVAL = coro; 2970 if (items > 1)
2971 {
2972 av_extend (coro->args, items - 1 + ix - 1);
2973
2974 if (ix)
2975 {
2976 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2977 cb = cv_coro_run;
2978 }
2979
2980 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2981
2982 for (i = 2; i < items; i++)
2983 av_push (coro->args, newSVsv (ST (i)));
2984 }
2985}
970 OUTPUT: 2986 OUTPUT:
971 RETVAL 2987 RETVAL
972 2988
973void 2989void
974transfer(prev, next, flags) 2990transfer (...)
975 SV *prev
976 SV *next
977 int flags
978 PROTOTYPE: @ 2991 PROTOTYPE: $$
979 CODE: 2992 CODE:
980 PUTBACK; 2993 CORO_EXECUTE_SLF_XS (slf_init_transfer);
981 SV_CORO (next, "Coro::transfer"); 2994
982 SV_CORO (prev, "Coro::transfer"); 2995bool
983 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2996_destroy (SV *coro_sv)
984 SPAGAIN; 2997 CODE:
2998 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2999 OUTPUT:
3000 RETVAL
985 3001
986void 3002void
987DESTROY(coro)
988 Coro::State coro
989 CODE:
990
991 if (coro->mainstack && coro->mainstack != main_mainstack)
992 {
993 struct coro temp;
994
995 PUTBACK;
996 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
997 LOAD(aTHX_ coro);
998 SPAGAIN;
999
1000 destroy_stacks (aTHX);
1001
1002 LOAD((&temp)); /* this will get rid of defsv etc.. */
1003 SPAGAIN;
1004
1005 coro->mainstack = 0;
1006 }
1007
1008 deallocate_stack (coro);
1009
1010 Safefree (coro);
1011
1012void
1013flush()
1014 CODE:
1015#ifdef MAY_FLUSH
1016 flush_padlist_cache ();
1017#endif
1018
1019void
1020_exit(code) 3003_exit (int code)
1021 int code
1022 PROTOTYPE: $ 3004 PROTOTYPE: $
1023 CODE: 3005 CODE:
1024#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025 _exit (code); 3006 _exit (code);
3007
3008SV *
3009clone (Coro::State coro)
3010 CODE:
3011{
3012#if CORO_CLONE
3013 struct coro *ncoro = coro_clone (aTHX_ coro);
3014 MAGIC *mg;
3015 /* TODO: too much duplication */
3016 ncoro->hv = newHV ();
3017 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3018 mg->mg_flags |= MGf_DUP;
3019 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
1026#else 3020#else
1027 signal (SIGTERM, SIG_DFL); 3021 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
1028 raise (SIGTERM);
1029 exit (code);
1030#endif 3022#endif
3023}
3024 OUTPUT:
3025 RETVAL
1031 3026
1032MODULE = Coro::State PACKAGE = Coro::Cont 3027int
3028cctx_stacksize (int new_stacksize = 0)
3029 PROTOTYPE: ;$
3030 CODE:
3031 RETVAL = cctx_stacksize;
3032 if (new_stacksize)
3033 {
3034 cctx_stacksize = new_stacksize;
3035 ++cctx_gen;
3036 }
3037 OUTPUT:
3038 RETVAL
1033 3039
1034# this is slightly dirty (should expose a c-level api) 3040int
3041cctx_max_idle (int max_idle = 0)
3042 PROTOTYPE: ;$
3043 CODE:
3044 RETVAL = cctx_max_idle;
3045 if (max_idle > 1)
3046 cctx_max_idle = max_idle;
3047 OUTPUT:
3048 RETVAL
3049
3050int
3051cctx_count ()
3052 PROTOTYPE:
3053 CODE:
3054 RETVAL = cctx_count;
3055 OUTPUT:
3056 RETVAL
3057
3058int
3059cctx_idle ()
3060 PROTOTYPE:
3061 CODE:
3062 RETVAL = cctx_idle;
3063 OUTPUT:
3064 RETVAL
1035 3065
1036void 3066void
1037yield(...) 3067list ()
1038 PROTOTYPE: @ 3068 PROTOTYPE:
3069 PPCODE:
3070{
3071 struct coro *coro;
3072 for (coro = coro_first; coro; coro = coro->next)
3073 if (coro->hv)
3074 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3075}
3076
3077void
3078call (Coro::State coro, SV *coderef)
3079 ALIAS:
3080 eval = 1
3081 CODE:
3082{
3083 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3084 {
3085 struct coro *current = SvSTATE_current;
3086
3087 if (current != coro)
3088 {
3089 PUTBACK;
3090 save_perl (aTHX_ current);
3091 load_perl (aTHX_ coro);
3092 SPAGAIN;
3093 }
3094
3095 PUSHSTACK;
3096
3097 PUSHMARK (SP);
3098 PUTBACK;
3099
3100 if (ix)
3101 eval_sv (coderef, 0);
3102 else
3103 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3104
3105 SPAGAIN;
3106 POPSTACK;
3107
3108 if (current != coro)
3109 {
3110 PUTBACK;
3111 save_perl (aTHX_ coro);
3112 load_perl (aTHX_ current);
3113 SPAGAIN;
3114 }
3115 }
3116}
3117
3118SV *
3119is_ready (Coro::State coro)
3120 PROTOTYPE: $
3121 ALIAS:
3122 is_ready = CF_READY
3123 is_running = CF_RUNNING
3124 is_new = CF_NEW
3125 is_destroyed = CF_DESTROYED
3126 CODE:
3127 RETVAL = boolSV (coro->flags & ix);
3128 OUTPUT:
3129 RETVAL
3130
3131void
3132throw (Coro::State self, SV *throw = &PL_sv_undef)
3133 PROTOTYPE: $;$
1039 CODE: 3134 CODE:
1040 static SV *returnstk; 3135{
1041 SV *sv; 3136 struct coro *current = SvSTATE_current;
1042 AV *defav = GvAV (PL_defgv); 3137 SV **throwp = self == current ? &CORO_THROW : &self->except;
1043 struct coro *prev, *next;
1044
1045 if (!returnstk)
1046 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048 /* set up @_ -- ugly */
1049 av_clear (defav);
1050 av_fill (defav, items - 1);
1051 while (items--)
1052 av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055 sv = av_pop ((AV *)SvRV (returnstk));
1056 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058 SvREFCNT_dec (sv); 3138 SvREFCNT_dec (*throwp);
3139 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3140}
1059 3141
1060 transfer(aTHX_ prev, next, 0); 3142void
3143api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3144 PROTOTYPE: $;$
3145 C_ARGS: aTHX_ coro, flags
3146
3147SV *
3148has_cctx (Coro::State coro)
3149 PROTOTYPE: $
3150 CODE:
3151 /* maybe manage the running flag differently */
3152 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3153 OUTPUT:
3154 RETVAL
3155
3156int
3157is_traced (Coro::State coro)
3158 PROTOTYPE: $
3159 CODE:
3160 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3161 OUTPUT:
3162 RETVAL
3163
3164UV
3165rss (Coro::State coro)
3166 PROTOTYPE: $
3167 ALIAS:
3168 usecount = 1
3169 CODE:
3170 switch (ix)
3171 {
3172 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3173 case 1: RETVAL = coro->usecount; break;
3174 }
3175 OUTPUT:
3176 RETVAL
3177
3178void
3179force_cctx ()
3180 PROTOTYPE:
3181 CODE:
3182 cctx_current->idle_sp = 0;
3183
3184void
3185swap_defsv (Coro::State self)
3186 PROTOTYPE: $
3187 ALIAS:
3188 swap_defav = 1
3189 CODE:
3190 if (!self->slot)
3191 croak ("cannot swap state with coroutine that has no saved state,");
3192 else
3193 {
3194 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3195 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3196
3197 SV *tmp = *src; *src = *dst; *dst = tmp;
3198 }
3199
1061 3200
1062MODULE = Coro::State PACKAGE = Coro 3201MODULE = Coro::State PACKAGE = Coro
1063 3202
1064# this is slightly dirty (should expose a c-level api)
1065
1066BOOT: 3203BOOT:
1067{ 3204{
1068 int i; 3205 int i;
3206
3207 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3208 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3209 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3210 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3211 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3212 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3213 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3214 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3215 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3216
3217 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3218 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3219 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3220 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3221
1069 HV *stash = gv_stashpv ("Coro", TRUE); 3222 coro_stash = gv_stashpv ("Coro", TRUE);
1070 3223
1071 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3224 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3225 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3226 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3227 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3228 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3229 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080 3230
1081 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3231 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082 coro_ready[i] = newAV (); 3232 coro_ready[i] = newAV ();
1083 3233
1084 { 3234 {
1085 SV *sv = perl_get_sv("Coro::API", 1); 3235 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1086 3236
1087 coroapi.schedule = api_schedule; 3237 coroapi.schedule = api_schedule;
3238 coroapi.schedule_to = api_schedule_to;
1088 coroapi.cede = api_cede; 3239 coroapi.cede = api_cede;
3240 coroapi.cede_notself = api_cede_notself;
1089 coroapi.ready = api_ready; 3241 coroapi.ready = api_ready;
3242 coroapi.is_ready = api_is_ready;
1090 coroapi.nready = &coro_nready; 3243 coroapi.nready = coro_nready;
1091 coroapi.current = coro_current; 3244 coroapi.current = coro_current;
1092 3245
1093 GCoroAPI = &coroapi; 3246 /*GCoroAPI = &coroapi;*/
1094 sv_setiv(sv, (IV)&coroapi); 3247 sv_setiv (sv, (IV)&coroapi);
1095 SvREADONLY_on(sv); 3248 SvREADONLY_on (sv);
1096 } 3249 }
1097} 3250}
1098 3251
1099void 3252void
1100ready(self) 3253terminate (...)
1101 SV * self 3254 CODE:
3255 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3256
3257void
3258schedule (...)
3259 CODE:
3260 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3261
3262void
3263schedule_to (...)
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3266
3267void
3268cede_to (...)
3269 CODE:
3270 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3271
3272void
3273cede (...)
3274 CODE:
3275 CORO_EXECUTE_SLF_XS (slf_init_cede);
3276
3277void
3278cede_notself (...)
3279 CODE:
3280 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3281
3282void
3283_cancel (Coro::State self)
3284 CODE:
3285 coro_state_destroy (aTHX_ self);
3286 coro_call_on_destroy (aTHX_ self);
3287
3288void
3289_set_current (SV *current)
1102 PROTOTYPE: $ 3290 PROTOTYPE: $
1103 CODE: 3291 CODE:
1104 api_ready (self); 3292 SvREFCNT_dec (SvRV (coro_current));
3293 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3294
3295void
3296_set_readyhook (SV *hook)
3297 PROTOTYPE: $
3298 CODE:
3299 SvREFCNT_dec (coro_readyhook);
3300 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1105 3301
1106int 3302int
3303prio (Coro::State coro, int newprio = 0)
3304 PROTOTYPE: $;$
3305 ALIAS:
3306 nice = 1
3307 CODE:
3308{
3309 RETVAL = coro->prio;
3310
3311 if (items > 1)
3312 {
3313 if (ix)
3314 newprio = coro->prio - newprio;
3315
3316 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3317 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3318
3319 coro->prio = newprio;
3320 }
3321}
3322 OUTPUT:
3323 RETVAL
3324
3325SV *
3326ready (SV *self)
3327 PROTOTYPE: $
3328 CODE:
3329 RETVAL = boolSV (api_ready (aTHX_ self));
3330 OUTPUT:
3331 RETVAL
3332
3333int
1107nready(...) 3334nready (...)
1108 PROTOTYPE: 3335 PROTOTYPE:
1109 CODE: 3336 CODE:
1110 RETVAL = coro_nready; 3337 RETVAL = coro_nready;
1111 OUTPUT: 3338 OUTPUT:
1112 RETVAL 3339 RETVAL
1113 3340
1114void 3341void
1115schedule(...) 3342_pool_handler (...)
1116 PROTOTYPE:
1117 CODE: 3343 CODE:
1118 api_schedule (); 3344 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1119 3345
1120void 3346void
1121cede(...) 3347async_pool (SV *cv, ...)
1122 PROTOTYPE: 3348 PROTOTYPE: &@
3349 PPCODE:
3350{
3351 HV *hv = (HV *)av_pop (av_async_pool);
3352 AV *av = newAV ();
3353 SV *cb = ST (0);
3354 int i;
3355
3356 av_extend (av, items - 2);
3357 for (i = 1; i < items; ++i)
3358 av_push (av, SvREFCNT_inc_NN (ST (i)));
3359
3360 if ((SV *)hv == &PL_sv_undef)
3361 {
3362 PUSHMARK (SP);
3363 EXTEND (SP, 2);
3364 PUSHs (sv_Coro);
3365 PUSHs ((SV *)cv_pool_handler);
3366 PUTBACK;
3367 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3368 SPAGAIN;
3369
3370 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3371 }
3372
3373 {
3374 struct coro *coro = SvSTATE_hv (hv);
3375
3376 assert (!coro->invoke_cb);
3377 assert (!coro->invoke_av);
3378 coro->invoke_cb = SvREFCNT_inc (cb);
3379 coro->invoke_av = av;
3380 }
3381
3382 api_ready (aTHX_ (SV *)hv);
3383
3384 if (GIMME_V != G_VOID)
3385 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3386 else
3387 SvREFCNT_dec (hv);
3388}
3389
3390SV *
3391rouse_cb ()
3392 PROTOTYPE:
1123 CODE: 3393 CODE:
3394 RETVAL = coro_new_rouse_cb (aTHX);
3395 OUTPUT:
3396 RETVAL
3397
3398void
3399rouse_wait (...)
3400 PROTOTYPE: ;$
3401 PPCODE:
3402 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3403
3404void
3405on_enter (SV *block)
3406 ALIAS:
3407 on_leave = 1
3408 PROTOTYPE: &
3409 CODE:
3410{
3411 struct coro *coro = SvSTATE_current;
3412 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3413
3414 block = (SV *)coro_sv_2cv (aTHX_ block);
3415
3416 if (!*avp)
3417 *avp = newAV ();
3418
3419 av_push (*avp, SvREFCNT_inc (block));
3420
3421 if (!ix)
3422 on_enterleave_call (aTHX_ block);
3423
3424 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3425 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3426 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3427}
3428
3429
3430MODULE = Coro::State PACKAGE = PerlIO::cede
3431
3432BOOT:
3433 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3434
3435
3436MODULE = Coro::State PACKAGE = Coro::Semaphore
3437
3438SV *
3439new (SV *klass, SV *count = 0)
3440 CODE:
3441 RETVAL = sv_bless (
3442 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3443 GvSTASH (CvGV (cv))
3444 );
3445 OUTPUT:
3446 RETVAL
3447
3448# helper for Coro::Channel
3449SV *
3450_alloc (int count)
3451 CODE:
3452 RETVAL = coro_waitarray_new (aTHX_ count);
3453 OUTPUT:
3454 RETVAL
3455
3456SV *
3457count (SV *self)
3458 CODE:
3459 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3460 OUTPUT:
3461 RETVAL
3462
3463void
3464up (SV *self, int adjust = 1)
3465 ALIAS:
3466 adjust = 1
3467 CODE:
3468 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3469
3470void
3471down (...)
3472 CODE:
3473 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3474
3475void
3476wait (...)
3477 CODE:
3478 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3479
3480void
3481try (SV *self)
3482 PPCODE:
3483{
3484 AV *av = (AV *)SvRV (self);
3485 SV *count_sv = AvARRAY (av)[0];
3486 IV count = SvIVX (count_sv);
3487
3488 if (count > 0)
3489 {
3490 --count;
3491 SvIVX (count_sv) = count;
3492 XSRETURN_YES;
3493 }
3494 else
3495 XSRETURN_NO;
3496}
3497
3498void
3499waiters (SV *self)
3500 PPCODE:
3501{
3502 AV *av = (AV *)SvRV (self);
3503 int wcount = AvFILLp (av) + 1 - 1;
3504
3505 if (GIMME_V == G_SCALAR)
3506 XPUSHs (sv_2mortal (newSViv (wcount)));
3507 else
3508 {
3509 int i;
3510 EXTEND (SP, wcount);
3511 for (i = 1; i <= wcount; ++i)
3512 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3513 }
3514}
3515
3516MODULE = Coro::State PACKAGE = Coro::Signal
3517
3518SV *
3519new (SV *klass)
3520 CODE:
3521 RETVAL = sv_bless (
3522 coro_waitarray_new (aTHX_ 0),
3523 GvSTASH (CvGV (cv))
3524 );
3525 OUTPUT:
3526 RETVAL
3527
3528void
3529wait (...)
3530 CODE:
3531 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3532
3533void
3534broadcast (SV *self)
3535 CODE:
3536{
3537 AV *av = (AV *)SvRV (self);
3538 coro_signal_wake (aTHX_ av, AvFILLp (av));
3539}
3540
3541void
3542send (SV *self)
3543 CODE:
3544{
3545 AV *av = (AV *)SvRV (self);
3546
3547 if (AvFILLp (av))
3548 coro_signal_wake (aTHX_ av, 1);
3549 else
3550 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3551}
3552
3553IV
3554awaited (SV *self)
3555 CODE:
3556 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3557 OUTPUT:
3558 RETVAL
3559
3560
3561MODULE = Coro::State PACKAGE = Coro::AnyEvent
3562
3563BOOT:
3564 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3565
3566void
3567_schedule (...)
3568 CODE:
3569{
3570 static int incede;
3571
1124 api_cede (); 3572 api_cede_notself (aTHX);
1125 3573
3574 ++incede;
3575 while (coro_nready >= incede && api_cede (aTHX))
3576 ;
3577
3578 sv_setsv (sv_activity, &PL_sv_undef);
3579 if (coro_nready >= incede)
3580 {
3581 PUSHMARK (SP);
3582 PUTBACK;
3583 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3584 }
3585
3586 --incede;
3587}
3588
3589
3590MODULE = Coro::State PACKAGE = Coro::AIO
3591
3592void
3593_register (char *target, char *proto, SV *req)
3594 CODE:
3595{
3596 CV *req_cv = coro_sv_2cv (aTHX_ req);
3597 /* newXSproto doesn't return the CV on 5.8 */
3598 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3599 sv_setpv ((SV *)slf_cv, proto);
3600 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3601}
3602

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