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Comparing Coro/Coro/State.xs (file contents):
Revision 1.37 by root, Tue Oct 9 00:39:11 2001 UTC vs.
Revision 1.308 by root, Wed Nov 19 15:09:57 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 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
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# 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
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
30 131
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 133
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
34 148
35#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
36 151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
155# endif
156#endif
157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 171
39/* this is actually not only the c stack but also c registers etc... */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
40typedef struct { 199typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 200{
42 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
45 coro_context cctx; 211 coro_context cctx;
46 212
47 void *sptr; 213 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
49} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
50 219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
51struct coro { 242struct coro {
52 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 244 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 245
57 /* optionally saved, might be zero */ 246 /* state data */
58 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65
66 /* the stacks and related info (callchain etc..) */
67 PERL_SI *curstackinfo;
68 AV *curstack;
69 AV *mainstack; 248 AV *mainstack;
70 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 250
251 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
260
261 /* coro process data */
262 int prio;
263 SV *except; /* exception to be thrown */
264 SV *rouse_cb;
265
266 /* async_pool */
267 SV *saved_deffh;
268
269 /* linked list */
270 struct coro *next, *prev;
96}; 271};
97 272
98typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
100 275
101static AV *main_mainstack; /* used to differentiate between $main and others */ 276/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 277/* and get copied between struct coro and these variables */
103static SV *ucoro_state_sv; 278/* the mainr easonw e don't support windows process emulation */
104static U32 ucoro_state_hash; 279static struct CoroSLF slf_frame; /* the current slf frame */
105static HV *padlist_cache;
106
107/* mostly copied from op.c:cv_clone2 */
108STATIC AV *
109clone_padlist (AV *protopadlist)
110{
111 AV *av;
112 I32 ix;
113 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115 SV **pname = AvARRAY (protopad_name);
116 SV **ppad = AvARRAY (protopad);
117 I32 fname = AvFILLp (protopad_name);
118 I32 fpad = AvFILLp (protopad);
119 AV *newpadlist, *newpad_name, *newpad;
120 SV **npad;
121
122 newpad_name = newAV ();
123 for (ix = fname; ix >= 0; ix--)
124 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126 newpad = newAV ();
127 av_fill (newpad, AvFILLp (protopad));
128 npad = AvARRAY (newpad);
129
130 newpadlist = newAV ();
131 AvREAL_off (newpadlist);
132 av_store (newpadlist, 0, (SV *) newpad_name);
133 av_store (newpadlist, 1, (SV *) newpad);
134
135 av = newAV (); /* will be @_ */
136 av_extend (av, 0);
137 av_store (newpad, 0, (SV *) av);
138 AvFLAGS (av) = AVf_REIFY;
139
140 for (ix = fpad; ix > 0; ix--)
141 {
142 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
143 if (namesv && namesv != &PL_sv_undef)
144 {
145 char *name = SvPVX (namesv); /* XXX */
146 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
147 { /* lexical from outside? */
148 npad[ix] = SvREFCNT_inc (ppad[ix]);
149 }
150 else
151 { /* our own lexical */
152 SV *sv;
153 if (*name == '&')
154 sv = SvREFCNT_inc (ppad[ix]);
155 else if (*name == '@')
156 sv = (SV *) newAV ();
157 else if (*name == '%')
158 sv = (SV *) newHV ();
159 else
160 sv = NEWSV (0, 0);
161 if (!SvPADBUSY (sv))
162 SvPADMY_on (sv);
163 npad[ix] = sv;
164 }
165 }
166 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
167 {
168 npad[ix] = SvREFCNT_inc (ppad[ix]);
169 }
170 else
171 {
172 SV *sv = NEWSV (0, 0);
173 SvPADTMP_on (sv);
174 npad[ix] = sv;
175 }
176 }
177
178#if 0 /* return -ENOTUNDERSTOOD */
179 /* Now that vars are all in place, clone nested closures. */
180
181 for (ix = fpad; ix > 0; ix--) {
182 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183 if (namesv
184 && namesv != &PL_sv_undef
185 && !(SvFLAGS(namesv) & SVf_FAKE)
186 && *SvPVX(namesv) == '&'
187 && CvCLONE(ppad[ix]))
188 {
189 CV *kid = cv_clone((CV*)ppad[ix]);
190 SvREFCNT_dec(ppad[ix]);
191 CvCLONE_on(kid);
192 SvPADMY_on(kid);
193 npad[ix] = (SV*)kid;
194 }
195 }
196#endif
197
198 return newpadlist;
199}
200
201#ifdef MAY_FLUSH
202STATIC void
203free_padlist (AV *padlist)
204{
205 /* may be during global destruction */
206 if (SvREFCNT(padlist))
207 {
208 I32 i = AvFILLp(padlist);
209 while (i >= 0)
210 {
211 SV **svp = av_fetch(padlist, i--, FALSE);
212 SV *sv = svp ? *svp : Nullsv;
213 if (sv)
214 SvREFCNT_dec(sv);
215 }
216
217 SvREFCNT_dec((SV*)padlist);
218 }
219}
220#endif
221
222/* the next two functions merely cache the padlists */
223STATIC void
224get_padlist (CV *cv)
225{
226 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228 if (he && AvFILLp ((AV *)*he) >= 0)
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230 else
231 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232}
233
234STATIC void
235put_padlist (CV *cv)
236{
237 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239 if (SvTYPE (*he) != SVt_PVAV)
240 {
241 SvREFCNT_dec (*he);
242 *he = (SV *)newAV ();
243 }
244
245 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246}
247
248#ifdef MAY_FLUSH
249STATIC void
250flush_padlist_cache ()
251{
252 HV *hv = padlist_cache;
253 padlist_cache = newHV ();
254
255 if (hv_iterinit (hv))
256 {
257 HE *he;
258 AV *padlist;
259
260 while (!!(he = hv_iternext (hv)))
261 {
262 AV *av = (AV *)HeVAL(he);
263
264 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (padlist);
267 }
268 }
269
270 SvREFCNT_dec (hv);
271}
272#endif
273
274#define SB do {
275#define SE } while (0)
276
277#define LOAD(state) load_state(aTHX_ (state));
278#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282static void
283load_state(pTHX_ Coro__State c)
284{
285 PL_dowarn = c->dowarn;
286 PL_in_eval = c->in_eval;
287
288 PL_curstackinfo = c->curstackinfo;
289 PL_curstack = c->curstack;
290 PL_mainstack = c->mainstack;
291 PL_stack_sp = c->stack_sp;
292 PL_op = c->op;
293 PL_curpad = c->curpad;
294 PL_stack_base = c->stack_base;
295 PL_stack_max = c->stack_max;
296 PL_tmps_stack = c->tmps_stack;
297 PL_tmps_floor = c->tmps_floor;
298 PL_tmps_ix = c->tmps_ix;
299 PL_tmps_max = c->tmps_max;
300 PL_markstack = c->markstack;
301 PL_markstack_ptr = c->markstack_ptr;
302 PL_markstack_max = c->markstack_max;
303 PL_scopestack = c->scopestack;
304 PL_scopestack_ix = c->scopestack_ix;
305 PL_scopestack_max = c->scopestack_max;
306 PL_savestack = c->savestack;
307 PL_savestack_ix = c->savestack_ix;
308 PL_savestack_max = c->savestack_max;
309 PL_retstack = c->retstack;
310 PL_retstack_ix = c->retstack_ix;
311 PL_retstack_max = c->retstack_max;
312 PL_curcop = c->curcop;
313 PL_top_env = c->top_env;
314
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318
319 {
320 dSP;
321 CV *cv;
322
323 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs))
325 {
326 AV *padlist = (AV *)POPs;
327
328 if (padlist)
329 {
330 put_padlist (cv); /* mark this padlist as available */
331 CvPADLIST(cv) = padlist;
332#ifdef USE_THREADS
333 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334#endif
335 }
336
337 ++CvDEPTH(cv);
338 }
339
340 PUTBACK;
341 }
342}
343
344static void
345save_state(pTHX_ Coro__State c, int flags)
346{
347 {
348 dSP;
349 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo;
352
353 /*
354 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :(
356 */
357
358 PUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */
360 for (;;)
361 {
362 while (cxix >= 0)
363 {
364 PERL_CONTEXT *cx = &ccstk[cxix--];
365
366 if (CxTYPE(cx) == CXt_SUB)
367 {
368 CV *cv = cx->blk_sub.cv;
369 if (CvDEPTH(cv))
370 {
371#ifdef USE_THREADS
372 /*XPUSHs ((SV *)CvOWNER(cv));*/
373 /*CvOWNER(cv) = 0;*/
374 /*error must unlock this cv etc.. etc...*/
375#endif
376 EXTEND (SP, CvDEPTH(cv)*2);
377
378 while (--CvDEPTH(cv))
379 {
380 /* this tells the restore code to increment CvDEPTH */
381 PUSHs (Nullsv);
382 PUSHs ((SV *)cv);
383 }
384
385 PUSHs ((SV *)CvPADLIST(cv));
386 PUSHs ((SV *)cv);
387
388 get_padlist (cv); /* this is a monster */
389 }
390 }
391 else if (CxTYPE(cx) == CXt_FORMAT)
392 {
393 /* I never used formats, so how should I know how these are implemented? */
394 /* my bold guess is as a simple, plain sub... */
395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396 }
397 }
398
399 if (top_si->si_type == PERLSI_MAIN)
400 break;
401
402 top_si = top_si->si_prev;
403 ccstk = top_si->si_cxstack;
404 cxix = top_si->si_cxix;
405 }
406
407 PUTBACK;
408 }
409
410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413
414 c->dowarn = PL_dowarn;
415 c->in_eval = PL_in_eval;
416
417 c->curstackinfo = PL_curstackinfo;
418 c->curstack = PL_curstack;
419 c->mainstack = PL_mainstack;
420 c->stack_sp = PL_stack_sp;
421 c->op = PL_op;
422 c->curpad = PL_curpad;
423 c->stack_base = PL_stack_base;
424 c->stack_max = PL_stack_max;
425 c->tmps_stack = PL_tmps_stack;
426 c->tmps_floor = PL_tmps_floor;
427 c->tmps_ix = PL_tmps_ix;
428 c->tmps_max = PL_tmps_max;
429 c->markstack = PL_markstack;
430 c->markstack_ptr = PL_markstack_ptr;
431 c->markstack_max = PL_markstack_max;
432 c->scopestack = PL_scopestack;
433 c->scopestack_ix = PL_scopestack_ix;
434 c->scopestack_max = PL_scopestack_max;
435 c->savestack = PL_savestack;
436 c->savestack_ix = PL_savestack_ix;
437 c->savestack_max = PL_savestack_max;
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441 c->curcop = PL_curcop;
442 c->top_env = PL_top_env;
443}
444
445/*
446 * allocate various perl stacks. This is an exact copy
447 * of perl.c:init_stacks, except that it uses less memory
448 * on the assumption that coroutines do not usually need
449 * a lot of stackspace.
450 */
451STATIC void
452coro_init_stacks (pTHX)
453{
454 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455 PL_curstackinfo->si_type = PERLSI_MAIN;
456 PL_curstack = PL_curstackinfo->si_stack;
457 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458
459 PL_stack_base = AvARRAY(PL_curstack);
460 PL_stack_sp = PL_stack_base;
461 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462
463 New(50,PL_tmps_stack,96,SV*);
464 PL_tmps_floor = -1;
465 PL_tmps_ix = -1;
466 PL_tmps_max = 96;
467
468 New(54,PL_markstack,16,I32);
469 PL_markstack_ptr = PL_markstack;
470 PL_markstack_max = PL_markstack + 16;
471
472 SET_MARK_OFFSET;
473
474 New(54,PL_scopestack,16,I32);
475 PL_scopestack_ix = 0;
476 PL_scopestack_max = 16;
477
478 New(54,PL_savestack,96,ANY);
479 PL_savestack_ix = 0;
480 PL_savestack_max = 96;
481
482 New(54,PL_retstack,8,OP*);
483 PL_retstack_ix = 0;
484 PL_retstack_max = 8;
485}
486
487/*
488 * destroy the stacks, the callchain etc...
489 * still there is a memleak of 128 bytes...
490 */
491STATIC void
492destroy_stacks(pTHX)
493{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next;
507
508 while (PL_curstackinfo)
509 {
510 PERL_SI *p = PL_curstackinfo->si_prev;
511
512 {
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 }
523
524 Safefree(PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo);
526 PL_curstackinfo = p;
527 }
528
529 Safefree(PL_tmps_stack);
530 Safefree(PL_markstack);
531 Safefree(PL_scopestack);
532 Safefree(PL_savestack);
533 Safefree(PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#if HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599
600 coro_init_stacks (aTHX);
601 /*PL_curcop = 0;*/
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP);
613 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616 if (SvTRUE (ERRSV))
617 croak (NULL);
618 else
619 croak ("FATAL: CCTXT coroutine returned!");
620 }
621 else
622 {
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 {
682 SAVE (prev, flags);
683 LOAD (next);
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 {
692 if (!prev->stack)
693 allocate_stack (prev, 0);
694 else if (prev->cursp != stacklevel
695 && prev->stack->usecnt > 1)
696 {
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 }
714
715 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else
719 {
720 SAVE (prev, -1); /* first get rid of the old state */
721
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 {
729 setup_coro (next);
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 }
746 else
747 setup_coro (next);
748 }
749
750 /*
751 * xnext is now either prev or next, depending on wether
752 * we switched the c stack or not. that's why i use a global
753 * variable, that should become thread-specific at one point.
754 */
755 xnext->cursp = stacklevel;
756 }
757}
758
759static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766 if (!he)
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779}
780
781static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags)
783{
784 transfer(aTHX_
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789 280
790/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
791 282
792#define PRIO_MAX 3 283#define PRIO_MAX 3
793#define PRIO_HIGH 1 284#define PRIO_HIGH 1
… …
795#define PRIO_LOW -1 286#define PRIO_LOW -1
796#define PRIO_IDLE -3 287#define PRIO_IDLE -3
797#define PRIO_MIN -4 288#define PRIO_MIN -4
798 289
799/* for Coro.pm */ 290/* for Coro.pm */
800static GV *coro_current, *coro_idle; 291static SV *coro_current;
292static SV *coro_readyhook;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 293static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
802static int coro_nready; 294static struct coro *coro_first;
295#define coro_nready coroapi.nready
803 296
804static void 297/** lowlevel stuff **********************************************************/
298
299static SV *
300coro_get_sv (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_sv (name, create);
305#endif
306 return get_sv (name, create);
307}
308
309static AV *
310coro_get_av (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_av (name, create);
315#endif
316 return get_av (name, create);
317}
318
319static HV *
320coro_get_hv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_hv (name, create);
325#endif
326 return get_hv (name, create);
327}
328
329/* may croak */
330INLINE CV *
805coro_enq (SV *sv) 331coro_sv_2cv (SV *sv)
806{ 332{
807 if (SvROK (sv)) 333 HV *st;
334 GV *gvp;
335 return sv_2cv (sv, &st, &gvp, 0);
336}
337
338static AV *
339coro_clone_padlist (pTHX_ CV *cv)
340{
341 AV *padlist = CvPADLIST (cv);
342 AV *newpadlist, *newpad;
343
344 newpadlist = newAV ();
345 AvREAL_off (newpadlist);
346#if PERL_VERSION_ATLEAST (5,10,0)
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
348#else
349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
350#endif
351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
352 --AvFILLp (padlist);
353
354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
355 av_store (newpadlist, 1, (SV *)newpad);
356
357 return newpadlist;
358}
359
360static void
361free_padlist (pTHX_ AV *padlist)
362{
363 /* may be during global destruction */
364 if (SvREFCNT (padlist))
808 { 365 {
809 SV *hv = SvRV (sv); 366 I32 i = AvFILLp (padlist);
810 if (SvTYPE (hv) == SVt_PVHV) 367 while (i >= 0)
811 { 368 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 369 SV **svp = av_fetch (padlist, i--, FALSE);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 370 if (svp)
371 {
372 SV *sv;
373 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
374 SvREFCNT_dec (sv);
814 375
815 prio = prio > PRIO_MAX ? PRIO_MAX 376 SvREFCNT_dec (*svp);
816 : prio < PRIO_MIN ? PRIO_MIN 377 }
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 } 378 }
379
380 SvREFCNT_dec ((SV*)padlist);
381 }
382}
383
384static int
385coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
386{
387 AV *padlist;
388 AV *av = (AV *)mg->mg_obj;
389
390 /* casting is fun. */
391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
392 free_padlist (aTHX_ padlist);
393
394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
395
396 return 0;
397}
398
399#define CORO_MAGIC_type_cv 26
400#define CORO_MAGIC_type_state PERL_MAGIC_ext
401
402static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0,
404 coro_cv_free
405};
406
407#define CORO_MAGIC_NN(sv, type) \
408 (expect_true (SvMAGIC (sv)->mg_type == type) \
409 ? SvMAGIC (sv) \
410 : mg_find (sv, type))
411
412#define CORO_MAGIC(sv, type) \
413 (expect_true (SvMAGIC (sv)) \
414 ? CORO_MAGIC_NN (sv, type) \
415 : 0)
416
417#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
418#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
419
420INLINE struct coro *
421SvSTATE_ (pTHX_ SV *coro)
422{
423 HV *stash;
424 MAGIC *mg;
425
426 if (SvROK (coro))
427 coro = SvRV (coro);
428
429 if (expect_false (SvTYPE (coro) != SVt_PVHV))
430 croak ("Coro::State object required");
431
432 stash = SvSTASH (coro);
433 if (expect_false (stash != coro_stash && stash != coro_state_stash))
434 {
435 /* very slow, but rare, check */
436 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
437 croak ("Coro::State object required");
438 }
439
440 mg = CORO_MAGIC_state (coro);
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
445
446/* faster than SvSTATE, but expects a coroutine hv */
447#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
448#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
449
450/* the next two functions merely cache the padlists */
451static void
452get_padlist (pTHX_ CV *cv)
453{
454 MAGIC *mg = CORO_MAGIC_cv (cv);
455 AV *av;
456
457 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
458 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
459 else
460 {
461#if CORO_PREFER_PERL_FUNCTIONS
462 /* this is probably cleaner? but also slower! */
463 /* in practise, it seems to be less stable */
464 CV *cp = Perl_cv_clone (aTHX_ cv);
465 CvPADLIST (cv) = CvPADLIST (cp);
466 CvPADLIST (cp) = 0;
467 SvREFCNT_dec (cp);
468#else
469 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
470#endif
824 } 471 }
825
826 croak ("Coro::ready tried to enqueue something that is not a coroutine");
827} 472}
828 473
474static void
475put_padlist (pTHX_ CV *cv)
476{
477 MAGIC *mg = CORO_MAGIC_cv (cv);
478 AV *av;
479
480 if (expect_false (!mg))
481 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
482
483 av = (AV *)mg->mg_obj;
484
485 if (expect_false (AvFILLp (av) >= AvMAX (av)))
486 av_extend (av, AvMAX (av) + 1);
487
488 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
489}
490
491/** load & save, init *******************************************************/
492
493static void
494load_perl (pTHX_ Coro__State c)
495{
496 perl_slots *slot = c->slot;
497 c->slot = 0;
498
499 PL_mainstack = c->mainstack;
500
501 GvSV (PL_defgv) = slot->defsv;
502 GvAV (PL_defgv) = slot->defav;
503 GvSV (PL_errgv) = slot->errsv;
504 GvSV (irsgv) = slot->irsgv;
505
506 #define VAR(name,type) PL_ ## name = slot->name;
507 # include "state.h"
508 #undef VAR
509
510 {
511 dSP;
512
513 CV *cv;
514
515 /* now do the ugly restore mess */
516 while (expect_true (cv = (CV *)POPs))
517 {
518 put_padlist (aTHX_ cv); /* mark this padlist as available */
519 CvDEPTH (cv) = PTR2IV (POPs);
520 CvPADLIST (cv) = (AV *)POPs;
521 }
522
523 PUTBACK;
524 }
525
526 slf_frame = c->slf_frame;
527 CORO_THROW = c->except;
528}
529
530static void
531save_perl (pTHX_ Coro__State c)
532{
533 c->except = CORO_THROW;
534 c->slf_frame = slf_frame;
535
536 {
537 dSP;
538 I32 cxix = cxstack_ix;
539 PERL_CONTEXT *ccstk = cxstack;
540 PERL_SI *top_si = PL_curstackinfo;
541
542 /*
543 * the worst thing you can imagine happens first - we have to save
544 * (and reinitialize) all cv's in the whole callchain :(
545 */
546
547 XPUSHs (Nullsv);
548 /* this loop was inspired by pp_caller */
549 for (;;)
550 {
551 while (expect_true (cxix >= 0))
552 {
553 PERL_CONTEXT *cx = &ccstk[cxix--];
554
555 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
556 {
557 CV *cv = cx->blk_sub.cv;
558
559 if (expect_true (CvDEPTH (cv)))
560 {
561 EXTEND (SP, 3);
562 PUSHs ((SV *)CvPADLIST (cv));
563 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
564 PUSHs ((SV *)cv);
565
566 CvDEPTH (cv) = 0;
567 get_padlist (aTHX_ cv);
568 }
569 }
570 }
571
572 if (expect_true (top_si->si_type == PERLSI_MAIN))
573 break;
574
575 top_si = top_si->si_prev;
576 ccstk = top_si->si_cxstack;
577 cxix = top_si->si_cxix;
578 }
579
580 PUTBACK;
581 }
582
583 /* allocate some space on the context stack for our purposes */
584 /* we manually unroll here, as usually 2 slots is enough */
585 if (SLOT_COUNT >= 1) CXINC;
586 if (SLOT_COUNT >= 2) CXINC;
587 if (SLOT_COUNT >= 3) CXINC;
588 {
589 int i;
590 for (i = 3; i < SLOT_COUNT; ++i)
591 CXINC;
592 }
593 cxstack_ix -= SLOT_COUNT; /* undo allocation */
594
595 c->mainstack = PL_mainstack;
596
597 {
598 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
599
600 slot->defav = GvAV (PL_defgv);
601 slot->defsv = DEFSV;
602 slot->errsv = ERRSV;
603 slot->irsgv = GvSV (irsgv);
604
605 #define VAR(name,type) slot->name = PL_ ## name;
606 # include "state.h"
607 #undef VAR
608 }
609}
610
611/*
612 * allocate various perl stacks. This is almost an exact copy
613 * of perl.c:init_stacks, except that it uses less memory
614 * on the (sometimes correct) assumption that coroutines do
615 * not usually need a lot of stackspace.
616 */
617#if CORO_PREFER_PERL_FUNCTIONS
618# define coro_init_stacks(thx) init_stacks ()
619#else
620static void
621coro_init_stacks (pTHX)
622{
623 PL_curstackinfo = new_stackinfo(32, 8);
624 PL_curstackinfo->si_type = PERLSI_MAIN;
625 PL_curstack = PL_curstackinfo->si_stack;
626 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
627
628 PL_stack_base = AvARRAY(PL_curstack);
629 PL_stack_sp = PL_stack_base;
630 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
631
632 New(50,PL_tmps_stack,32,SV*);
633 PL_tmps_floor = -1;
634 PL_tmps_ix = -1;
635 PL_tmps_max = 32;
636
637 New(54,PL_markstack,16,I32);
638 PL_markstack_ptr = PL_markstack;
639 PL_markstack_max = PL_markstack + 16;
640
641#ifdef SET_MARK_OFFSET
642 SET_MARK_OFFSET;
643#endif
644
645 New(54,PL_scopestack,8,I32);
646 PL_scopestack_ix = 0;
647 PL_scopestack_max = 8;
648
649 New(54,PL_savestack,24,ANY);
650 PL_savestack_ix = 0;
651 PL_savestack_max = 24;
652
653#if !PERL_VERSION_ATLEAST (5,10,0)
654 New(54,PL_retstack,4,OP*);
655 PL_retstack_ix = 0;
656 PL_retstack_max = 4;
657#endif
658}
659#endif
660
661/*
662 * destroy the stacks, the callchain etc...
663 */
664static void
665coro_destruct_stacks (pTHX)
666{
667 while (PL_curstackinfo->si_next)
668 PL_curstackinfo = PL_curstackinfo->si_next;
669
670 while (PL_curstackinfo)
671 {
672 PERL_SI *p = PL_curstackinfo->si_prev;
673
674 if (!IN_DESTRUCT)
675 SvREFCNT_dec (PL_curstackinfo->si_stack);
676
677 Safefree (PL_curstackinfo->si_cxstack);
678 Safefree (PL_curstackinfo);
679 PL_curstackinfo = p;
680 }
681
682 Safefree (PL_tmps_stack);
683 Safefree (PL_markstack);
684 Safefree (PL_scopestack);
685 Safefree (PL_savestack);
686#if !PERL_VERSION_ATLEAST (5,10,0)
687 Safefree (PL_retstack);
688#endif
689}
690
691static size_t
692coro_rss (pTHX_ struct coro *coro)
693{
694 size_t rss = sizeof (*coro);
695
696 if (coro->mainstack)
697 {
698 perl_slots tmp_slot;
699 perl_slots *slot;
700
701 if (coro->flags & CF_RUNNING)
702 {
703 slot = &tmp_slot;
704
705 #define VAR(name,type) slot->name = PL_ ## name;
706 # include "state.h"
707 #undef VAR
708 }
709 else
710 slot = coro->slot;
711
712 if (slot)
713 {
714 rss += sizeof (slot->curstackinfo);
715 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
716 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
717 rss += slot->tmps_max * sizeof (SV *);
718 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
719 rss += slot->scopestack_max * sizeof (I32);
720 rss += slot->savestack_max * sizeof (ANY);
721
722#if !PERL_VERSION_ATLEAST (5,10,0)
723 rss += slot->retstack_max * sizeof (OP *);
724#endif
725 }
726 }
727
728 return rss;
729}
730
731/** coroutine stack handling ************************************************/
732
733static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
734static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
736
737/* apparently < 5.8.8 */
738#ifndef MgPV_nolen_const
739#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
740 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
741 (const char*)(mg)->mg_ptr)
742#endif
743
744/*
745 * This overrides the default magic get method of %SIG elements.
746 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
747 * and instead of tryign to save and restore the hash elements, we just provide
748 * readback here.
749 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
750 * not expecting this to actually change the hook. This is a potential problem
751 * when a schedule happens then, but we ignore this.
752 */
753static int
754coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
768 return 0;
769 }
770 }
771
772 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
773}
774
775static int
776coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
777{
778 const char *s = MgPV_nolen_const (mg);
779
780 if (*s == '_')
781 {
782 SV **svp = 0;
783
784 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
785 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
786
787 if (svp)
788 {
789 SV *old = *svp;
790 *svp = 0;
791 SvREFCNT_dec (old);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
797}
798
799static int
800coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = newSVsv (sv);
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
821}
822
823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
839coro_setup (pTHX_ struct coro *coro)
840{
841 /*
842 * emulate part of the perl startup here.
843 */
844 coro_init_stacks (aTHX);
845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_type = OP_ENTERSUB;
877 myop.op_flags = OPf_WANT_VOID;
878
879 PUSHMARK (SP);
880 PUSHs ((SV *)coro->startcv);
881 PUTBACK;
882 PL_op = (OP *)&myop;
883 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 */
889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags etc. required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
904static void
905coro_destruct (pTHX_ struct coro *coro)
906{
907 if (!IN_DESTRUCT)
908 {
909 /* restore all saved variables and stuff */
910 LEAVE_SCOPE (0);
911 assert (PL_tmps_floor == -1);
912
913 /* free all temporaries */
914 FREETMPS;
915 assert (PL_tmps_ix == -1);
916
917 /* unwind all extra stacks */
918 POPSTACK_TO (PL_mainstack);
919
920 /* unwind main stack */
921 dounwind (-1);
922 }
923
924 SvREFCNT_dec (GvSV (PL_defgv));
925 SvREFCNT_dec (GvAV (PL_defgv));
926 SvREFCNT_dec (GvSV (PL_errgv));
927 SvREFCNT_dec (PL_defoutgv);
928 SvREFCNT_dec (PL_rs);
929 SvREFCNT_dec (GvSV (irsgv));
930
931 SvREFCNT_dec (PL_diehook);
932 SvREFCNT_dec (PL_warnhook);
933
934 SvREFCNT_dec (coro->saved_deffh);
935 SvREFCNT_dec (coro->rouse_cb);
936
937 coro_destruct_stacks (aTHX);
938}
939
940INLINE void
941free_coro_mortal (pTHX)
942{
943 if (expect_true (coro_mortal))
944 {
945 SvREFCNT_dec (coro_mortal);
946 coro_mortal = 0;
947 }
948}
949
950static int
951runops_trace (pTHX)
952{
953 COP *oldcop = 0;
954 int oldcxix = -2;
955 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
956 coro_cctx *cctx = coro->cctx;
957
958 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
959 {
960 PERL_ASYNC_CHECK ();
961
962 if (cctx->flags & CC_TRACE_ALL)
963 {
964 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
965 {
966 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
967 SV **bot, **top;
968 AV *av = newAV (); /* return values */
969 SV **cb;
970 dSP;
971
972 GV *gv = CvGV (cx->blk_sub.cv);
973 SV *fullname = sv_2mortal (newSV (0));
974 if (isGV (gv))
975 gv_efullname3 (fullname, gv, 0);
976
977 bot = PL_stack_base + cx->blk_oldsp + 1;
978 top = cx->blk_gimme == G_ARRAY ? SP + 1
979 : cx->blk_gimme == G_SCALAR ? bot + 1
980 : bot;
981
982 av_extend (av, top - bot);
983 while (bot < top)
984 av_push (av, SvREFCNT_inc_NN (*bot++));
985
986 PL_runops = RUNOPS_DEFAULT;
987 ENTER;
988 SAVETMPS;
989 EXTEND (SP, 3);
990 PUSHMARK (SP);
991 PUSHs (&PL_sv_no);
992 PUSHs (fullname);
993 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
994 PUTBACK;
995 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
996 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
997 SPAGAIN;
998 FREETMPS;
999 LEAVE;
1000 PL_runops = runops_trace;
1001 }
1002
1003 if (oldcop != PL_curcop)
1004 {
1005 oldcop = PL_curcop;
1006
1007 if (PL_curcop != &PL_compiling)
1008 {
1009 SV **cb;
1010
1011 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1012 {
1013 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1014
1015 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1016 {
1017 runops_proc_t old_runops = PL_runops;
1018 dSP;
1019 GV *gv = CvGV (cx->blk_sub.cv);
1020 SV *fullname = sv_2mortal (newSV (0));
1021
1022 if (isGV (gv))
1023 gv_efullname3 (fullname, gv, 0);
1024
1025 PL_runops = RUNOPS_DEFAULT;
1026 ENTER;
1027 SAVETMPS;
1028 EXTEND (SP, 3);
1029 PUSHMARK (SP);
1030 PUSHs (&PL_sv_yes);
1031 PUSHs (fullname);
1032 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1033 PUTBACK;
1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1036 SPAGAIN;
1037 FREETMPS;
1038 LEAVE;
1039 PL_runops = runops_trace;
1040 }
1041
1042 oldcxix = cxstack_ix;
1043 }
1044
1045 if (cctx->flags & CC_TRACE_LINE)
1046 {
1047 dSP;
1048
1049 PL_runops = RUNOPS_DEFAULT;
1050 ENTER;
1051 SAVETMPS;
1052 EXTEND (SP, 3);
1053 PL_runops = RUNOPS_DEFAULT;
1054 PUSHMARK (SP);
1055 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1056 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1057 PUTBACK;
1058 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1059 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1060 SPAGAIN;
1061 FREETMPS;
1062 LEAVE;
1063 PL_runops = runops_trace;
1064 }
1065 }
1066 }
1067 }
1068 }
1069
1070 TAINT_NOT;
1071 return 0;
1072}
1073
1074static struct coro_cctx *cctx_ssl_cctx;
1075static struct CoroSLF cctx_ssl_frame;
1076
1077static void
1078slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1079{
1080 ta->prev = (struct coro *)cctx_ssl_cctx;
1081 ta->next = 0;
1082}
1083
1084static int
1085slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1086{
1087 *frame = cctx_ssl_frame;
1088
1089 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1090}
1091
1092/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1093static void NOINLINE
1094cctx_prepare (pTHX_ coro_cctx *cctx)
1095{
1096 PL_top_env = &PL_start_env;
1097
1098 if (cctx->flags & CC_TRACE)
1099 PL_runops = runops_trace;
1100
1101 /* we already must be executing an SLF op, there is no other valid way
1102 * that can lead to creation of a new cctx */
1103 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1104 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1105
1106 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1107 cctx_ssl_cctx = cctx;
1108 cctx_ssl_frame = slf_frame;
1109
1110 slf_frame.prepare = slf_prepare_set_stacklevel;
1111 slf_frame.check = slf_check_set_stacklevel;
1112}
1113
1114/* the tail of transfer: execute stuff we can only do after a transfer */
1115INLINE void
1116transfer_tail (pTHX)
1117{
1118 free_coro_mortal (aTHX);
1119}
1120
1121/*
1122 * this is a _very_ stripped down perl interpreter ;)
1123 */
1124static void
1125cctx_run (void *arg)
1126{
1127#ifdef USE_ITHREADS
1128# if CORO_PTHREAD
1129 PERL_SET_CONTEXT (coro_thx);
1130# endif
1131#endif
1132 {
1133 dTHX;
1134
1135 /* normally we would need to skip the entersub here */
1136 /* not doing so will re-execute it, which is exactly what we want */
1137 /* PL_nop = PL_nop->op_next */
1138
1139 /* inject a fake subroutine call to cctx_init */
1140 cctx_prepare (aTHX_ (coro_cctx *)arg);
1141
1142 /* cctx_run is the alternative tail of transfer() */
1143 transfer_tail (aTHX);
1144
1145 /* somebody or something will hit me for both perl_run and PL_restartop */
1146 PL_restartop = PL_op;
1147 perl_run (PL_curinterp);
1148 /*
1149 * Unfortunately, there is no way to get at the return values of the
1150 * coro body here, as perl_run destroys these
1151 */
1152
1153 /*
1154 * If perl-run returns we assume exit() was being called or the coro
1155 * fell off the end, which seems to be the only valid (non-bug)
1156 * reason for perl_run to return. We try to exit by jumping to the
1157 * bootstrap-time "top" top_env, as we cannot restore the "main"
1158 * coroutine as Coro has no such concept
1159 */
1160 PL_top_env = main_top_env;
1161 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1162 }
1163}
1164
1165static coro_cctx *
1166cctx_new ()
1167{
1168 coro_cctx *cctx;
1169
1170 ++cctx_count;
1171 New (0, cctx, 1, coro_cctx);
1172
1173 cctx->gen = cctx_gen;
1174 cctx->flags = 0;
1175 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1176
1177 return cctx;
1178}
1179
1180/* create a new cctx only suitable as source */
1181static coro_cctx *
1182cctx_new_empty ()
1183{
1184 coro_cctx *cctx = cctx_new ();
1185
1186 cctx->sptr = 0;
1187 coro_create (&cctx->cctx, 0, 0, 0, 0);
1188
1189 return cctx;
1190}
1191
1192/* create a new cctx suitable as destination/running a perl interpreter */
1193static coro_cctx *
1194cctx_new_run ()
1195{
1196 coro_cctx *cctx = cctx_new ();
1197 void *stack_start;
1198 size_t stack_size;
1199
1200#if HAVE_MMAP
1201 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1202 /* mmap supposedly does allocate-on-write for us */
1203 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1204
1205 if (cctx->sptr != (void *)-1)
1206 {
1207 #if CORO_STACKGUARD
1208 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1209 #endif
1210 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1211 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1212 cctx->flags |= CC_MAPPED;
1213 }
1214 else
1215#endif
1216 {
1217 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1218 New (0, cctx->sptr, cctx_stacksize, long);
1219
1220 if (!cctx->sptr)
1221 {
1222 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1223 _exit (EXIT_FAILURE);
1224 }
1225
1226 stack_start = cctx->sptr;
1227 stack_size = cctx->ssize;
1228 }
1229
1230 #if CORO_USE_VALGRIND
1231 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1232 #endif
1233
1234 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1235
1236 return cctx;
1237}
1238
1239static void
1240cctx_destroy (coro_cctx *cctx)
1241{
1242 if (!cctx)
1243 return;
1244
1245 --cctx_count;
1246 coro_destroy (&cctx->cctx);
1247
1248 /* coro_transfer creates new, empty cctx's */
1249 if (cctx->sptr)
1250 {
1251 #if CORO_USE_VALGRIND
1252 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1253 #endif
1254
1255#if HAVE_MMAP
1256 if (cctx->flags & CC_MAPPED)
1257 munmap (cctx->sptr, cctx->ssize);
1258 else
1259#endif
1260 Safefree (cctx->sptr);
1261 }
1262
1263 Safefree (cctx);
1264}
1265
1266/* wether this cctx should be destructed */
1267#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1268
1269static coro_cctx *
1270cctx_get (pTHX)
1271{
1272 while (expect_true (cctx_first))
1273 {
1274 coro_cctx *cctx = cctx_first;
1275 cctx_first = cctx->next;
1276 --cctx_idle;
1277
1278 if (expect_true (!CCTX_EXPIRED (cctx)))
1279 return cctx;
1280
1281 cctx_destroy (cctx);
1282 }
1283
1284 return cctx_new_run ();
1285}
1286
1287static void
1288cctx_put (coro_cctx *cctx)
1289{
1290 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1291
1292 /* free another cctx if overlimit */
1293 if (expect_false (cctx_idle >= cctx_max_idle))
1294 {
1295 coro_cctx *first = cctx_first;
1296 cctx_first = first->next;
1297 --cctx_idle;
1298
1299 cctx_destroy (first);
1300 }
1301
1302 ++cctx_idle;
1303 cctx->next = cctx_first;
1304 cctx_first = cctx;
1305}
1306
1307/** coroutine switching *****************************************************/
1308
1309static void
1310transfer_check (pTHX_ struct coro *prev, struct coro *next)
1311{
1312 /* TODO: throwing up here is considered harmful */
1313
1314 if (expect_true (prev != next))
1315 {
1316 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1317 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1318
1319 if (expect_false (next->flags & CF_RUNNING))
1320 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1321
1322 if (expect_false (next->flags & CF_DESTROYED))
1323 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1324
1325#if !PERL_VERSION_ATLEAST (5,10,0)
1326 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1327 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1328#endif
1329 }
1330}
1331
1332/* always use the TRANSFER macro */
1333static void NOINLINE /* noinline so we have a fixed stackframe */
1334transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1335{
1336 dSTACKLEVEL;
1337
1338 /* sometimes transfer is only called to set idle_sp */
1339 if (expect_false (!next))
1340 {
1341 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1342 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1343 }
1344 else if (expect_true (prev != next))
1345 {
1346 coro_cctx *prev__cctx;
1347
1348 if (expect_false (prev->flags & CF_NEW))
1349 {
1350 /* create a new empty/source context */
1351 prev->cctx = cctx_new_empty ();
1352 prev->flags &= ~CF_NEW;
1353 prev->flags |= CF_RUNNING;
1354 }
1355
1356 prev->flags &= ~CF_RUNNING;
1357 next->flags |= CF_RUNNING;
1358
1359 /* first get rid of the old state */
1360 save_perl (aTHX_ prev);
1361
1362 if (expect_false (next->flags & CF_NEW))
1363 {
1364 /* need to start coroutine */
1365 next->flags &= ~CF_NEW;
1366 /* setup coroutine call */
1367 coro_setup (aTHX_ next);
1368 }
1369 else
1370 load_perl (aTHX_ next);
1371
1372 prev__cctx = prev->cctx;
1373
1374 /* possibly untie and reuse the cctx */
1375 if (expect_true (
1376 prev__cctx->idle_sp == STACKLEVEL
1377 && !(prev__cctx->flags & CC_TRACE)
1378 && !force_cctx
1379 ))
1380 {
1381 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1382 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1383
1384 prev->cctx = 0;
1385
1386 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1387 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1388 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1389 if (!next->cctx)
1390 next->cctx = cctx_get (aTHX);
1391
1392 cctx_put (prev__cctx);
1393 }
1394
1395 ++next->usecount;
1396
1397 if (expect_true (!next->cctx))
1398 next->cctx = cctx_get (aTHX);
1399
1400 if (expect_false (prev__cctx != next->cctx))
1401 {
1402 prev__cctx->top_env = PL_top_env;
1403 PL_top_env = next->cctx->top_env;
1404 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1405 }
1406
1407 transfer_tail (aTHX);
1408 }
1409}
1410
1411#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1412#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1413
1414/** high level stuff ********************************************************/
1415
1416static int
1417coro_state_destroy (pTHX_ struct coro *coro)
1418{
1419 if (coro->flags & CF_DESTROYED)
1420 return 0;
1421
1422 if (coro->on_destroy)
1423 coro->on_destroy (aTHX_ coro);
1424
1425 coro->flags |= CF_DESTROYED;
1426
1427 if (coro->flags & CF_READY)
1428 {
1429 /* reduce nready, as destroying a ready coro effectively unreadies it */
1430 /* alternative: look through all ready queues and remove the coro */
1431 --coro_nready;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435
1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1437 {
1438 struct coro temp;
1439
1440 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1441
1442 save_perl (aTHX_ &temp);
1443 load_perl (aTHX_ coro);
1444
1445 coro_destruct (aTHX_ coro);
1446
1447 load_perl (aTHX_ &temp);
1448
1449 coro->slot = 0;
1450 }
1451
1452 cctx_destroy (coro->cctx);
1453 SvREFCNT_dec (coro->startcv);
1454 SvREFCNT_dec (coro->args);
1455 SvREFCNT_dec (CORO_THROW);
1456
1457 if (coro->next) coro->next->prev = coro->prev;
1458 if (coro->prev) coro->prev->next = coro->next;
1459 if (coro == coro_first) coro_first = coro->next;
1460
1461 return 1;
1462}
1463
1464static int
1465coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1466{
1467 struct coro *coro = (struct coro *)mg->mg_ptr;
1468 mg->mg_ptr = 0;
1469
1470 coro->hv = 0;
1471
1472 if (--coro->refcnt < 0)
1473 {
1474 coro_state_destroy (aTHX_ coro);
1475 Safefree (coro);
1476 }
1477
1478 return 0;
1479}
1480
1481static int
1482coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1483{
1484 struct coro *coro = (struct coro *)mg->mg_ptr;
1485
1486 ++coro->refcnt;
1487
1488 return 0;
1489}
1490
1491static MGVTBL coro_state_vtbl = {
1492 0, 0, 0, 0,
1493 coro_state_free,
1494 0,
1495#ifdef MGf_DUP
1496 coro_state_dup,
1497#else
1498# define MGf_DUP 0
1499#endif
1500};
1501
1502static void
1503prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1504{
1505 ta->prev = SvSTATE (prev_sv);
1506 ta->next = SvSTATE (next_sv);
1507 TRANSFER_CHECK (*ta);
1508}
1509
1510static void
1511api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1512{
1513 struct coro_transfer_args ta;
1514
1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516 TRANSFER (ta, 1);
1517}
1518
1519/*****************************************************************************/
1520/* gensub: simple closure generation utility */
1521
1522#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1523
1524/* create a closure from XS, returns a code reference */
1525/* the arg can be accessed via GENSUB_ARG from the callback */
1526/* the callback must use dXSARGS/XSRETURN */
829static SV * 1527static SV *
830coro_deq (int min_prio) 1528gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
831{ 1529{
832 int prio = PRIO_MAX - PRIO_MIN; 1530 CV *cv = (CV *)newSV (0);
833 1531
834 min_prio -= PRIO_MIN; 1532 sv_upgrade ((SV *)cv, SVt_PVCV);
835 if (min_prio < 0)
836 min_prio = 0;
837 1533
1534 CvANON_on (cv);
1535 CvISXSUB_on (cv);
1536 CvXSUB (cv) = xsub;
1537 GENSUB_ARG = arg;
1538
1539 return newRV_noinc ((SV *)cv);
1540}
1541
1542/** Coro ********************************************************************/
1543
1544INLINE void
1545coro_enq (pTHX_ struct coro *coro)
1546{
1547 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1548}
1549
1550INLINE SV *
1551coro_deq (pTHX)
1552{
1553 int prio;
1554
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1555 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
839 if (av_len (coro_ready[prio]) >= 0) 1556 if (AvFILLp (coro_ready [prio]) >= 0)
840 {
841 coro_nready--;
842 return av_shift (coro_ready[prio]); 1557 return av_shift (coro_ready [prio]);
843 }
844 1558
845 return 0; 1559 return 0;
846} 1560}
847 1561
848static void 1562static int
849api_ready (SV *coro) 1563api_ready (pTHX_ SV *coro_sv)
850{ 1564{
851 coro_enq (SvREFCNT_inc (coro)); 1565 struct coro *coro;
852} 1566 SV *sv_hook;
1567 void (*xs_hook)(void);
853 1568
1569 if (SvROK (coro_sv))
1570 coro_sv = SvRV (coro_sv);
1571
1572 coro = SvSTATE (coro_sv);
1573
1574 if (coro->flags & CF_READY)
1575 return 0;
1576
1577 coro->flags |= CF_READY;
1578
1579 sv_hook = coro_nready ? 0 : coro_readyhook;
1580 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1581
1582 coro_enq (aTHX_ coro);
1583 ++coro_nready;
1584
1585 if (sv_hook)
1586 {
1587 dSP;
1588
1589 ENTER;
1590 SAVETMPS;
1591
1592 PUSHMARK (SP);
1593 PUTBACK;
1594 call_sv (sv_hook, G_VOID | G_DISCARD);
1595
1596 FREETMPS;
1597 LEAVE;
1598 }
1599
1600 if (xs_hook)
1601 xs_hook ();
1602
1603 return 1;
1604}
1605
854static void 1606static int
855api_schedule (int cede) 1607api_is_ready (pTHX_ SV *coro_sv)
856{ 1608{
1609 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1610}
1611
1612INLINE void
1613prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1614{
857 SV *prev, *next; 1615 SV *prev_sv, *next_sv;
858 1616
1617 for (;;)
1618 {
1619 next_sv = coro_deq (aTHX);
1620
1621 /* nothing to schedule: call the idle handler */
1622 if (expect_false (!next_sv))
1623 {
1624 dSP;
1625
1626 ENTER;
1627 SAVETMPS;
1628
1629 PUSHMARK (SP);
1630 PUTBACK;
1631 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1632
1633 FREETMPS;
1634 LEAVE;
1635 continue;
1636 }
1637
1638 ta->next = SvSTATE_hv (next_sv);
1639
1640 /* cannot transfer to destroyed coros, skip and look for next */
1641 if (expect_false (ta->next->flags & CF_DESTROYED))
1642 {
1643 SvREFCNT_dec (next_sv);
1644 /* coro_nready has already been taken care of by destroy */
1645 continue;
1646 }
1647
1648 --coro_nready;
1649 break;
1650 }
1651
1652 /* free this only after the transfer */
859 prev = GvSV (coro_current); 1653 prev_sv = SvRV (coro_current);
1654 ta->prev = SvSTATE_hv (prev_sv);
1655 TRANSFER_CHECK (*ta);
1656 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1657 ta->next->flags &= ~CF_READY;
1658 SvRV_set (coro_current, next_sv);
860 1659
861 if (cede) 1660 free_coro_mortal (aTHX);
862 coro_enq (SvREFCNT_inc (prev)); 1661 coro_mortal = prev_sv;
1662}
863 1663
864 next = coro_deq (PRIO_MIN); 1664INLINE void
1665prepare_cede (pTHX_ struct coro_transfer_args *ta)
1666{
1667 api_ready (aTHX_ coro_current);
1668 prepare_schedule (aTHX_ ta);
1669}
865 1670
866 if (!next) 1671INLINE void
867 next = SvREFCNT_inc (GvSV (coro_idle)); 1672prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1673{
1674 SV *prev = SvRV (coro_current);
868 1675
869 GvSV (coro_current) = SvREFCNT_inc (next); 1676 if (coro_nready)
870 transfer (aTHX_ 1677 {
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1678 prepare_schedule (aTHX_ ta);
872 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1679 api_ready (aTHX_ prev);
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1680 }
1681 else
1682 prepare_nop (aTHX_ ta);
1683}
1684
1685static void
1686api_schedule (pTHX)
1687{
1688 struct coro_transfer_args ta;
1689
1690 prepare_schedule (aTHX_ &ta);
1691 TRANSFER (ta, 1);
1692}
1693
1694static int
1695api_cede (pTHX)
1696{
1697 struct coro_transfer_args ta;
1698
1699 prepare_cede (aTHX_ &ta);
1700
1701 if (expect_true (ta.prev != ta.next))
1702 {
1703 TRANSFER (ta, 1);
1704 return 1;
1705 }
1706 else
1707 return 0;
1708}
1709
1710static int
1711api_cede_notself (pTHX)
1712{
1713 if (coro_nready)
1714 {
1715 struct coro_transfer_args ta;
1716
1717 prepare_cede_notself (aTHX_ &ta);
1718 TRANSFER (ta, 1);
1719 return 1;
1720 }
1721 else
1722 return 0;
1723}
1724
1725static void
1726api_trace (pTHX_ SV *coro_sv, int flags)
1727{
1728 struct coro *coro = SvSTATE (coro_sv);
1729
1730 if (flags & CC_TRACE)
1731 {
1732 if (!coro->cctx)
1733 coro->cctx = cctx_new_run ();
1734 else if (!(coro->cctx->flags & CC_TRACE))
1735 croak ("cannot enable tracing on coroutine with custom stack,");
1736
1737 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1738 }
1739 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1740 {
1741 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1742
1743 if (coro->flags & CF_RUNNING)
1744 PL_runops = RUNOPS_DEFAULT;
1745 else
1746 coro->slot->runops = RUNOPS_DEFAULT;
1747 }
1748}
1749
1750/*****************************************************************************/
1751/* rouse callback */
1752
1753#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1754
1755static void
1756coro_rouse_callback (pTHX_ CV *cv)
1757{
1758 dXSARGS;
1759 SV *data = (SV *)GENSUB_ARG;
1760
1761 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1762 {
1763 /* first call, set args */
1764 int i;
1765 AV *av = newAV ();
1766 SV *coro = SvRV (data);
1767
1768 SvRV_set (data, (SV *)av);
1769 api_ready (aTHX_ coro);
1770 SvREFCNT_dec (coro);
1771
1772 /* better take a full copy of the arguments */
1773 while (items--)
1774 av_store (av, items, newSVsv (ST (items)));
1775 }
1776
1777 XSRETURN_EMPTY;
1778}
1779
1780static int
1781slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1782{
1783 SV *data = (SV *)frame->data;
1784
1785 if (CORO_THROW)
1786 return 0;
1787
1788 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1789 return 1;
1790
1791 /* now push all results on the stack */
1792 {
1793 dSP;
1794 AV *av = (AV *)SvRV (data);
1795 int i;
1796
1797 EXTEND (SP, AvFILLp (av) + 1);
1798 for (i = 0; i <= AvFILLp (av); ++i)
1799 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1800
1801 /* we have stolen the elements, so ste length to zero and free */
1802 AvFILLp (av) = -1;
1803 av_undef (av);
1804
1805 PUTBACK;
1806 }
1807
1808 return 0;
1809}
1810
1811static void
1812slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1813{
1814 SV *cb;
1815
1816 if (items)
1817 cb = arg [0];
1818 else
1819 {
1820 struct coro *coro = SvSTATE_current;
1821
1822 if (!coro->rouse_cb)
1823 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1824
1825 cb = sv_2mortal (coro->rouse_cb);
1826 coro->rouse_cb = 0;
1827 }
1828
1829 if (!SvROK (cb)
1830 || SvTYPE (SvRV (cb)) != SVt_PVCV
1831 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1832 croak ("Coro::rouse_wait called with illegal callback argument,");
1833
1834 {
1835 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1836 SV *data = (SV *)GENSUB_ARG;
1837
1838 frame->data = (void *)data;
1839 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1840 frame->check = slf_check_rouse_wait;
1841 }
1842}
1843
1844static SV *
1845coro_new_rouse_cb (pTHX)
1846{
1847 HV *hv = (HV *)SvRV (coro_current);
1848 struct coro *coro = SvSTATE_hv (hv);
1849 SV *data = newRV_inc ((SV *)hv);
1850 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1851
1852 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1853 SvREFCNT_dec (data); /* magicext increases the refcount */
1854
1855 SvREFCNT_dec (coro->rouse_cb);
1856 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1857
1858 return cb;
1859}
1860
1861/*****************************************************************************/
1862/* schedule-like-function opcode (SLF) */
1863
1864static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1865static const CV *slf_cv;
1866static SV **slf_argv;
1867static int slf_argc, slf_arga; /* count, allocated */
1868static I32 slf_ax; /* top of stack, for restore */
1869
1870/* this restores the stack in the case we patched the entersub, to */
1871/* recreate the stack frame as perl will on following calls */
1872/* since entersub cleared the stack */
1873static OP *
1874pp_restore (pTHX)
1875{
1876 int i;
1877 SV **SP = PL_stack_base + slf_ax;
1878
1879 PUSHMARK (SP);
1880
1881 EXTEND (SP, slf_argc + 1);
1882
1883 for (i = 0; i < slf_argc; ++i)
1884 PUSHs (sv_2mortal (slf_argv [i]));
1885
1886 PUSHs ((SV *)CvGV (slf_cv));
1887
1888 RETURNOP (slf_restore.op_first);
1889}
1890
1891static void
1892slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1893{
1894 SV **arg = (SV **)slf_frame.data;
1895
1896 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1897}
1898
1899static void
1900slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1901{
1902 if (items != 2)
1903 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1904
1905 frame->prepare = slf_prepare_transfer;
1906 frame->check = slf_check_nop;
1907 frame->data = (void *)arg; /* let's hope it will stay valid */
1908}
1909
1910static void
1911slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1912{
1913 frame->prepare = prepare_schedule;
1914 frame->check = slf_check_nop;
1915}
1916
1917static void
1918slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1919{
1920 frame->prepare = prepare_cede;
1921 frame->check = slf_check_nop;
1922}
1923
1924static void
1925slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1926{
1927 frame->prepare = prepare_cede_notself;
1928 frame->check = slf_check_nop;
1929}
1930
1931/*
1932 * these not obviously related functions are all rolled into one
1933 * function to increase chances that they all will call transfer with the same
1934 * stack offset
1935 * SLF stands for "schedule-like-function".
1936 */
1937static OP *
1938pp_slf (pTHX)
1939{
1940 I32 checkmark; /* mark SP to see how many elements check has pushed */
1941
1942 /* set up the slf frame, unless it has already been set-up */
1943 /* the latter happens when a new coro has been started */
1944 /* or when a new cctx was attached to an existing coroutine */
1945 if (expect_true (!slf_frame.prepare))
1946 {
1947 /* first iteration */
1948 dSP;
1949 SV **arg = PL_stack_base + TOPMARK + 1;
1950 int items = SP - arg; /* args without function object */
1951 SV *gv = *sp;
1952
1953 /* do a quick consistency check on the "function" object, and if it isn't */
1954 /* for us, divert to the real entersub */
1955 if (SvTYPE (gv) != SVt_PVGV
1956 || !GvCV (gv)
1957 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1958 return PL_ppaddr[OP_ENTERSUB](aTHX);
1959
1960 if (!(PL_op->op_flags & OPf_STACKED))
1961 {
1962 /* ampersand-form of call, use @_ instead of stack */
1963 AV *av = GvAV (PL_defgv);
1964 arg = AvARRAY (av);
1965 items = AvFILLp (av) + 1;
1966 }
1967
1968 /* now call the init function, which needs to set up slf_frame */
1969 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1970 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1971
1972 /* pop args */
1973 SP = PL_stack_base + POPMARK;
1974
1975 PUTBACK;
1976 }
1977
1978 /* now that we have a slf_frame, interpret it! */
1979 /* we use a callback system not to make the code needlessly */
1980 /* complicated, but so we can run multiple perl coros from one cctx */
1981
1982 do
1983 {
1984 struct coro_transfer_args ta;
1985
1986 slf_frame.prepare (aTHX_ &ta);
1987 TRANSFER (ta, 0);
1988
1989 checkmark = PL_stack_sp - PL_stack_base;
1990 }
1991 while (slf_frame.check (aTHX_ &slf_frame));
1992
1993 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1994
1995 /* exception handling */
1996 if (expect_false (CORO_THROW))
1997 {
1998 SV *exception = sv_2mortal (CORO_THROW);
1999
2000 CORO_THROW = 0;
2001 sv_setsv (ERRSV, exception);
2002 croak (0);
2003 }
2004
2005 /* return value handling - mostly like entersub */
2006 /* make sure we put something on the stack in scalar context */
2007 if (GIMME_V == G_SCALAR)
2008 {
2009 dSP;
2010 SV **bot = PL_stack_base + checkmark;
2011
2012 if (sp == bot) /* too few, push undef */
2013 bot [1] = &PL_sv_undef;
2014 else if (sp != bot + 1) /* too many, take last one */
2015 bot [1] = *sp;
2016
2017 SP = bot + 1;
2018
2019 PUTBACK;
2020 }
2021
2022 return NORMAL;
2023}
2024
2025static void
2026api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2027{
2028 int i;
2029 SV **arg = PL_stack_base + ax;
2030 int items = PL_stack_sp - arg + 1;
2031
2032 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2033
2034 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2035 && PL_op->op_ppaddr != pp_slf)
2036 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2037
2038 CvFLAGS (cv) |= CVf_SLF;
2039 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2040 slf_cv = cv;
2041
2042 /* we patch the op, and then re-run the whole call */
2043 /* we have to put the same argument on the stack for this to work */
2044 /* and this will be done by pp_restore */
2045 slf_restore.op_next = (OP *)&slf_restore;
2046 slf_restore.op_type = OP_CUSTOM;
2047 slf_restore.op_ppaddr = pp_restore;
2048 slf_restore.op_first = PL_op;
2049
2050 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2051
2052 if (PL_op->op_flags & OPf_STACKED)
2053 {
2054 if (items > slf_arga)
2055 {
2056 slf_arga = items;
2057 free (slf_argv);
2058 slf_argv = malloc (slf_arga * sizeof (SV *));
2059 }
2060
2061 slf_argc = items;
2062
2063 for (i = 0; i < items; ++i)
2064 slf_argv [i] = SvREFCNT_inc (arg [i]);
2065 }
2066 else
2067 slf_argc = 0;
2068
2069 PL_op->op_ppaddr = pp_slf;
2070 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2071
2072 PL_op = (OP *)&slf_restore;
2073}
2074
2075/*****************************************************************************/
2076/* PerlIO::cede */
2077
2078typedef struct
2079{
2080 PerlIOBuf base;
2081 NV next, every;
2082} PerlIOCede;
2083
2084static IV
2085PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2086{
2087 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2088
2089 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2090 self->next = nvtime () + self->every;
2091
2092 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2093}
2094
2095static SV *
2096PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2097{
2098 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2099
2100 return newSVnv (self->every);
2101}
2102
2103static IV
2104PerlIOCede_flush (pTHX_ PerlIO *f)
2105{
2106 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2107 double now = nvtime ();
2108
2109 if (now >= self->next)
2110 {
2111 api_cede (aTHX);
2112 self->next = now + self->every;
2113 }
2114
2115 return PerlIOBuf_flush (aTHX_ f);
2116}
2117
2118static PerlIO_funcs PerlIO_cede =
2119{
2120 sizeof(PerlIO_funcs),
2121 "cede",
2122 sizeof(PerlIOCede),
2123 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2124 PerlIOCede_pushed,
2125 PerlIOBuf_popped,
2126 PerlIOBuf_open,
2127 PerlIOBase_binmode,
2128 PerlIOCede_getarg,
2129 PerlIOBase_fileno,
2130 PerlIOBuf_dup,
2131 PerlIOBuf_read,
2132 PerlIOBuf_unread,
2133 PerlIOBuf_write,
2134 PerlIOBuf_seek,
2135 PerlIOBuf_tell,
2136 PerlIOBuf_close,
2137 PerlIOCede_flush,
2138 PerlIOBuf_fill,
2139 PerlIOBase_eof,
2140 PerlIOBase_error,
2141 PerlIOBase_clearerr,
2142 PerlIOBase_setlinebuf,
2143 PerlIOBuf_get_base,
2144 PerlIOBuf_bufsiz,
2145 PerlIOBuf_get_ptr,
2146 PerlIOBuf_get_cnt,
2147 PerlIOBuf_set_ptrcnt,
2148};
2149
2150/*****************************************************************************/
2151/* Coro::Semaphore & Coro::Signal */
2152
2153static SV *
2154coro_waitarray_new (pTHX_ int count)
2155{
2156 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2157 AV *av = newAV ();
2158 SV **ary;
2159
2160 /* unfortunately, building manually saves memory */
2161 Newx (ary, 2, SV *);
2162 AvALLOC (av) = ary;
2163 /*AvARRAY (av) = ary;*/
2164 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2165 AvMAX (av) = 1;
2166 AvFILLp (av) = 0;
2167 ary [0] = newSViv (count);
2168
2169 return newRV_noinc ((SV *)av);
2170}
2171
2172/* semaphore */
2173
2174static void
2175coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2176{
2177 SV *count_sv = AvARRAY (av)[0];
2178 IV count = SvIVX (count_sv);
2179
2180 count += adjust;
2181 SvIVX (count_sv) = count;
2182
2183 /* now wake up as many waiters as are expected to lock */
2184 while (count > 0 && AvFILLp (av) > 0)
2185 {
2186 SV *cb;
2187
2188 /* swap first two elements so we can shift a waiter */
2189 AvARRAY (av)[0] = AvARRAY (av)[1];
2190 AvARRAY (av)[1] = count_sv;
2191 cb = av_shift (av);
2192
2193 if (SvOBJECT (cb))
2194 {
2195 api_ready (aTHX_ cb);
2196 --count;
2197 }
2198 else if (SvTYPE (cb) == SVt_PVCV)
2199 {
2200 dSP;
2201 PUSHMARK (SP);
2202 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2203 PUTBACK;
2204 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2205 }
2206
874 SvREFCNT_dec (next); 2207 SvREFCNT_dec (cb);
2208 }
2209}
2210
2211static void
2212coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2213{
2214 /* call $sem->adjust (0) to possibly wake up some other waiters */
2215 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2216}
2217
2218static int
2219slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2220{
2221 AV *av = (AV *)frame->data;
2222 SV *count_sv = AvARRAY (av)[0];
2223
2224 /* if we are about to throw, don't actually acquire the lock, just throw */
2225 if (CORO_THROW)
2226 return 0;
2227 else if (SvIVX (count_sv) > 0)
2228 {
2229 SvSTATE_current->on_destroy = 0;
2230
2231 if (acquire)
2232 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2233 else
2234 coro_semaphore_adjust (aTHX_ av, 0);
2235
2236 return 0;
2237 }
2238 else
2239 {
2240 int i;
2241 /* if we were woken up but can't down, we look through the whole */
2242 /* waiters list and only add us if we aren't in there already */
2243 /* this avoids some degenerate memory usage cases */
2244
2245 for (i = 1; i <= AvFILLp (av); ++i)
2246 if (AvARRAY (av)[i] == SvRV (coro_current))
2247 return 1;
2248
2249 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2250 return 1;
2251 }
2252}
2253
2254static int
2255slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2256{
2257 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2258}
2259
2260static int
2261slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2262{
2263 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2264}
2265
2266static void
2267slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 AV *av = (AV *)SvRV (arg [0]);
2270
2271 if (SvIVX (AvARRAY (av)[0]) > 0)
2272 {
2273 frame->data = (void *)av;
2274 frame->prepare = prepare_nop;
2275 }
2276 else
2277 {
2278 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2279
2280 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2281 frame->prepare = prepare_schedule;
2282
2283 /* to avoid race conditions when a woken-up coro gets terminated */
2284 /* we arrange for a temporary on_destroy that calls adjust (0) */
2285 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2286 }
2287}
2288
2289static void
2290slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2293 frame->check = slf_check_semaphore_down;
2294}
2295
2296static void
2297slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 if (items >= 2)
2300 {
2301 /* callback form */
2302 AV *av = (AV *)SvRV (arg [0]);
2303 CV *cb_cv = coro_sv_2cv (arg [1]);
2304
2305 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2306
2307 if (SvIVX (AvARRAY (av)[0]) > 0)
2308 coro_semaphore_adjust (aTHX_ av, 0);
2309
2310 frame->prepare = prepare_nop;
2311 frame->check = slf_check_nop;
2312 }
2313 else
2314 {
2315 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2316 frame->check = slf_check_semaphore_wait;
2317 }
2318}
2319
2320/* signal */
2321
2322static void
2323coro_signal_wake (pTHX_ AV *av, int count)
2324{
2325 SvIVX (AvARRAY (av)[0]) = 0;
2326
2327 /* now signal count waiters */
2328 while (count > 0 && AvFILLp (av) > 0)
2329 {
2330 SV *cb;
2331
2332 /* swap first two elements so we can shift a waiter */
2333 cb = AvARRAY (av)[0];
2334 AvARRAY (av)[0] = AvARRAY (av)[1];
2335 AvARRAY (av)[1] = cb;
2336
2337 cb = av_shift (av);
2338
2339 api_ready (aTHX_ cb);
2340 sv_setiv (cb, 0); /* signal waiter */
2341 SvREFCNT_dec (cb);
2342
2343 --count;
2344 }
2345}
2346
2347static int
2348slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2349{
2350 /* if we are about to throw, also stop waiting */
2351 return SvROK ((SV *)frame->data) && !CORO_THROW;
2352}
2353
2354static void
2355slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2356{
2357 AV *av = (AV *)SvRV (arg [0]);
2358
2359 if (SvIVX (AvARRAY (av)[0]))
2360 {
2361 SvIVX (AvARRAY (av)[0]) = 0;
2362 frame->prepare = prepare_nop;
2363 frame->check = slf_check_nop;
2364 }
2365 else
2366 {
2367 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2368
2369 av_push (av, waiter);
2370
2371 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2372 frame->prepare = prepare_schedule;
2373 frame->check = slf_check_signal_wait;
2374 }
2375}
2376
2377/*****************************************************************************/
2378/* Coro::AIO */
2379
2380#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2381
2382/* helper storage struct */
2383struct io_state
2384{
2385 int errorno;
2386 I32 laststype; /* U16 in 5.10.0 */
2387 int laststatval;
2388 Stat_t statcache;
2389};
2390
2391static void
2392coro_aio_callback (pTHX_ CV *cv)
2393{
2394 dXSARGS;
2395 AV *state = (AV *)GENSUB_ARG;
2396 SV *coro = av_pop (state);
2397 SV *data_sv = newSV (sizeof (struct io_state));
2398
2399 av_extend (state, items);
2400
2401 sv_upgrade (data_sv, SVt_PV);
2402 SvCUR_set (data_sv, sizeof (struct io_state));
2403 SvPOK_only (data_sv);
2404
2405 {
2406 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2407
2408 data->errorno = errno;
2409 data->laststype = PL_laststype;
2410 data->laststatval = PL_laststatval;
2411 data->statcache = PL_statcache;
2412 }
2413
2414 /* now build the result vector out of all the parameters and the data_sv */
2415 {
2416 int i;
2417
2418 for (i = 0; i < items; ++i)
2419 av_push (state, SvREFCNT_inc_NN (ST (i)));
2420 }
2421
2422 av_push (state, data_sv);
2423
2424 api_ready (aTHX_ coro);
875 SvREFCNT_dec (prev); 2425 SvREFCNT_dec (coro);
2426 SvREFCNT_dec ((AV *)state);
876} 2427}
877 2428
2429static int
2430slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2431{
2432 AV *state = (AV *)frame->data;
2433
2434 /* if we are about to throw, return early */
2435 /* this does not cancel the aio request, but at least */
2436 /* it quickly returns */
2437 if (CORO_THROW)
2438 return 0;
2439
2440 /* one element that is an RV? repeat! */
2441 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2442 return 1;
2443
2444 /* restore status */
2445 {
2446 SV *data_sv = av_pop (state);
2447 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2448
2449 errno = data->errorno;
2450 PL_laststype = data->laststype;
2451 PL_laststatval = data->laststatval;
2452 PL_statcache = data->statcache;
2453
2454 SvREFCNT_dec (data_sv);
2455 }
2456
2457 /* push result values */
2458 {
2459 dSP;
2460 int i;
2461
2462 EXTEND (SP, AvFILLp (state) + 1);
2463 for (i = 0; i <= AvFILLp (state); ++i)
2464 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2465
2466 PUTBACK;
2467 }
2468
2469 return 0;
2470}
2471
2472static void
2473slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2474{
2475 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2476 SV *coro_hv = SvRV (coro_current);
2477 struct coro *coro = SvSTATE_hv (coro_hv);
2478
2479 /* put our coroutine id on the state arg */
2480 av_push (state, SvREFCNT_inc_NN (coro_hv));
2481
2482 /* first see whether we have a non-zero priority and set it as AIO prio */
2483 if (coro->prio)
2484 {
2485 dSP;
2486
2487 static SV *prio_cv;
2488 static SV *prio_sv;
2489
2490 if (expect_false (!prio_cv))
2491 {
2492 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2493 prio_sv = newSViv (0);
2494 }
2495
2496 PUSHMARK (SP);
2497 sv_setiv (prio_sv, coro->prio);
2498 XPUSHs (prio_sv);
2499
2500 PUTBACK;
2501 call_sv (prio_cv, G_VOID | G_DISCARD);
2502 }
2503
2504 /* now call the original request */
2505 {
2506 dSP;
2507 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2508 int i;
2509
2510 PUSHMARK (SP);
2511
2512 /* first push all args to the stack */
2513 EXTEND (SP, items + 1);
2514
2515 for (i = 0; i < items; ++i)
2516 PUSHs (arg [i]);
2517
2518 /* now push the callback closure */
2519 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2520
2521 /* now call the AIO function - we assume our request is uncancelable */
2522 PUTBACK;
2523 call_sv ((SV *)req, G_VOID | G_DISCARD);
2524 }
2525
2526 /* now that the requets is going, we loop toll we have a result */
2527 frame->data = (void *)state;
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_aio_req;
2530}
2531
2532static void
2533coro_aio_req_xs (pTHX_ CV *cv)
2534{
2535 dXSARGS;
2536
2537 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2538
2539 XSRETURN_EMPTY;
2540}
2541
2542/*****************************************************************************/
2543
878MODULE = Coro::State PACKAGE = Coro::State 2544MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 2545
880PROTOTYPES: ENABLE 2546PROTOTYPES: DISABLE
881 2547
882BOOT: 2548BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 2549{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2550#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2551# if CORO_PTHREAD
2552 coro_thx = PERL_GET_CONTEXT;
2553# endif
2554#endif
2555 BOOT_PAGESIZE;
2556
2557 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2558 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2559
2560 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2561 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2562 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2563
2564 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2565 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2566 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2567
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2568 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 2569
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2570 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2571 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2572 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2573 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 2574
896 main_mainstack = PL_mainstack; 2575 main_mainstack = PL_mainstack;
2576 main_top_env = PL_top_env;
897 2577
2578 while (main_top_env->je_prev)
2579 main_top_env = main_top_env->je_prev;
2580
2581 {
2582 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2583
2584 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2585 hv_store_ent (PL_custom_op_names, slf,
2586 newSVpv ("coro_slf", 0), 0);
2587
2588 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2589 hv_store_ent (PL_custom_op_descs, slf,
2590 newSVpv ("coro schedule like function", 0), 0);
2591 }
2592
898 coroapi.ver = CORO_API_VERSION; 2593 coroapi.ver = CORO_API_VERSION;
2594 coroapi.rev = CORO_API_REVISION;
2595
899 coroapi.transfer = api_transfer; 2596 coroapi.transfer = api_transfer;
900}
901 2597
902Coro::State 2598 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 2599 coroapi.execute_slf = api_execute_slf;
904 SV * args 2600 coroapi.prepare_nop = prepare_nop;
905 PROTOTYPE: $ 2601 coroapi.prepare_schedule = prepare_schedule;
2602 coroapi.prepare_cede = prepare_cede;
2603 coroapi.prepare_cede_notself = prepare_cede_notself;
2604
2605 {
2606 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2607
2608 if (!svp) croak ("Time::HiRes is required");
2609 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2610
2611 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2612 }
2613
2614 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2615}
2616
2617SV *
2618new (char *klass, ...)
906 CODE: 2619 CODE:
907 Coro__State coro; 2620{
2621 struct coro *coro;
2622 MAGIC *mg;
2623 HV *hv;
2624 CV *cb;
2625 int i;
908 2626
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2627 if (items > 1)
910 croak ("Coro::State::_newprocess expects an arrayref");
911 2628 {
2629 cb = coro_sv_2cv (ST (1));
2630
2631 if (CvISXSUB (cb))
2632 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2633
2634 if (!CvROOT (cb))
2635 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2636 }
2637
912 New (0, coro, 1, struct coro); 2638 Newz (0, coro, 1, struct coro);
2639 coro->args = newAV ();
2640 coro->flags = CF_NEW;
913 2641
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2642 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 2643 coro->next = coro_first;
916 coro->stack = 0; 2644 coro_first = coro;
917 2645
918 RETVAL = coro; 2646 coro->hv = hv = newHV ();
2647 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2648 mg->mg_flags |= MGf_DUP;
2649 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2650
2651 if (items > 1)
2652 {
2653 coro->startcv = SvREFCNT_inc_NN (cb);
2654
2655 av_extend (coro->args, items - 1);
2656 for (i = 2; i < items; i++)
2657 av_push (coro->args, newSVsv (ST (i)));
2658 }
2659}
919 OUTPUT: 2660 OUTPUT:
920 RETVAL 2661 RETVAL
921 2662
922void 2663void
923transfer(prev, next, flags) 2664transfer (...)
924 Coro::State_or_hashref prev
925 Coro::State_or_hashref next
926 int flags
927 PROTOTYPE: @ 2665 PROTOTYPE: $$
928 CODE: 2666 CODE:
929 PUTBACK; 2667 CORO_EXECUTE_SLF_XS (slf_init_transfer);
930 transfer (aTHX_ prev, next, flags); 2668
931 SPAGAIN; 2669bool
2670_destroy (SV *coro_sv)
2671 CODE:
2672 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2673 OUTPUT:
2674 RETVAL
932 2675
933void 2676void
934DESTROY(coro) 2677_exit (int code)
935 Coro::State coro 2678 PROTOTYPE: $
936 CODE: 2679 CODE:
2680 _exit (code);
937 2681
938 if (coro->mainstack && coro->mainstack != main_mainstack) 2682int
2683cctx_stacksize (int new_stacksize = 0)
2684 PROTOTYPE: ;$
2685 CODE:
2686 RETVAL = cctx_stacksize;
2687 if (new_stacksize)
2688 {
2689 cctx_stacksize = new_stacksize;
2690 ++cctx_gen;
2691 }
2692 OUTPUT:
2693 RETVAL
2694
2695int
2696cctx_max_idle (int max_idle = 0)
2697 PROTOTYPE: ;$
2698 CODE:
2699 RETVAL = cctx_max_idle;
2700 if (max_idle > 1)
2701 cctx_max_idle = max_idle;
2702 OUTPUT:
2703 RETVAL
2704
2705int
2706cctx_count ()
2707 PROTOTYPE:
2708 CODE:
2709 RETVAL = cctx_count;
2710 OUTPUT:
2711 RETVAL
2712
2713int
2714cctx_idle ()
2715 PROTOTYPE:
2716 CODE:
2717 RETVAL = cctx_idle;
2718 OUTPUT:
2719 RETVAL
2720
2721void
2722list ()
2723 PROTOTYPE:
2724 PPCODE:
2725{
2726 struct coro *coro;
2727 for (coro = coro_first; coro; coro = coro->next)
2728 if (coro->hv)
2729 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2730}
2731
2732void
2733call (Coro::State coro, SV *coderef)
2734 ALIAS:
2735 eval = 1
2736 CODE:
2737{
2738 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
939 { 2739 {
940 struct coro temp; 2740 struct coro temp;
941 2741
2742 if (!(coro->flags & CF_RUNNING))
2743 {
2744 PUTBACK;
2745 save_perl (aTHX_ &temp);
2746 load_perl (aTHX_ coro);
2747 }
2748
2749 {
2750 dSP;
2751 ENTER;
2752 SAVETMPS;
942 PUTBACK; 2753 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2754 PUSHSTACK;
944 LOAD(aTHX_ coro); 2755 PUSHMARK (SP);
2756
2757 if (ix)
2758 eval_sv (coderef, 0);
2759 else
2760 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2761
2762 POPSTACK;
945 SPAGAIN; 2763 SPAGAIN;
2764 FREETMPS;
2765 LEAVE;
2766 PUTBACK;
2767 }
946 2768
947 destroy_stacks (aTHX); 2769 if (!(coro->flags & CF_RUNNING))
948 2770 {
949 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2771 save_perl (aTHX_ coro);
2772 load_perl (aTHX_ &temp);
950 SPAGAIN; 2773 SPAGAIN;
951 2774 }
952 coro->mainstack = 0;
953 } 2775 }
2776}
954 2777
955 deallocate_stack (coro); 2778SV *
956 2779is_ready (Coro::State coro)
957 Safefree (coro); 2780 PROTOTYPE: $
2781 ALIAS:
2782 is_ready = CF_READY
2783 is_running = CF_RUNNING
2784 is_new = CF_NEW
2785 is_destroyed = CF_DESTROYED
2786 CODE:
2787 RETVAL = boolSV (coro->flags & ix);
2788 OUTPUT:
2789 RETVAL
958 2790
959void 2791void
960flush() 2792throw (Coro::State self, SV *throw = &PL_sv_undef)
961 CODE: 2793 PROTOTYPE: $;$
962#ifdef MAY_FLUSH 2794 CODE:
963 flush_padlist_cache (); 2795{
964#endif 2796 struct coro *current = SvSTATE_current;
2797 SV **throwp = self == current ? &CORO_THROW : &self->except;
2798 SvREFCNT_dec (*throwp);
2799 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2800}
965 2801
966void 2802void
967_exit(code) 2803api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
968 int code 2804 PROTOTYPE: $;$
2805 C_ARGS: aTHX_ coro, flags
2806
2807SV *
2808has_cctx (Coro::State coro)
969 PROTOTYPE: $ 2809 PROTOTYPE: $
970 CODE: 2810 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 2811 RETVAL = boolSV (!!coro->cctx);
972 _exit (code); 2812 OUTPUT:
973#else 2813 RETVAL
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 2814
979MODULE = Coro::State PACKAGE = Coro::Cont 2815int
2816is_traced (Coro::State coro)
2817 PROTOTYPE: $
2818 CODE:
2819 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2820 OUTPUT:
2821 RETVAL
980 2822
981# this is slightly dirty (should expose a c-level api) 2823UV
2824rss (Coro::State coro)
2825 PROTOTYPE: $
2826 ALIAS:
2827 usecount = 1
2828 CODE:
2829 switch (ix)
2830 {
2831 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2832 case 1: RETVAL = coro->usecount; break;
2833 }
2834 OUTPUT:
2835 RETVAL
982 2836
983void 2837void
984yield(...) 2838force_cctx ()
2839 PROTOTYPE:
2840 CODE:
2841 SvSTATE_current->cctx->idle_sp = 0;
2842
2843void
2844swap_defsv (Coro::State self)
985 PROTOTYPE: @ 2845 PROTOTYPE: $
2846 ALIAS:
2847 swap_defav = 1
986 CODE: 2848 CODE:
987 static SV *returnstk; 2849 if (!self->slot)
988 SV *sv; 2850 croak ("cannot swap state with coroutine that has no saved state,");
989 AV *defav = GvAV (PL_defgv); 2851 else
990 struct coro *prev, *next; 2852 {
2853 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2854 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
991 2855
992 if (!returnstk) 2856 SV *tmp = *src; *src = *dst; *dst = tmp;
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2857 }
994 2858
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv);
1006
1007 transfer(aTHX_ prev, next, 0);
1008 2859
1009MODULE = Coro::State PACKAGE = Coro 2860MODULE = Coro::State PACKAGE = Coro
1010 2861
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 2862BOOT:
1014{ 2863{
1015 int i; 2864 int i;
2865
2866 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2867 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2868 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2869
2870 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2871 SvREADONLY_on (coro_current);
2872
1016 HV *stash = gv_stashpv ("Coro", TRUE); 2873 coro_stash = gv_stashpv ("Coro", TRUE);
1017 2874
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2875 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2876 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2877 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2878 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2879 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2880 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027 2881
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2882 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 2883 coro_ready[i] = newAV ();
1030 2884
1031 { 2885 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 2886 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1033 2887
1034 coroapi.schedule = api_schedule; 2888 coroapi.schedule = api_schedule;
2889 coroapi.cede = api_cede;
2890 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 2891 coroapi.ready = api_ready;
2892 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 2893 coroapi.nready = coro_nready;
1037 coroapi.current = coro_current; 2894 coroapi.current = coro_current;
1038 2895
1039 GCoroAPI = &coroapi; 2896 /*GCoroAPI = &coroapi;*/
1040 sv_setiv(sv, (IV)&coroapi); 2897 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 2898 SvREADONLY_on (sv);
1042 } 2899 }
1043} 2900}
1044 2901
1045void 2902void
1046ready(self) 2903schedule (...)
1047 SV * self 2904 CODE:
2905 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2906
2907void
2908cede (...)
2909 CODE:
2910 CORO_EXECUTE_SLF_XS (slf_init_cede);
2911
2912void
2913cede_notself (...)
2914 CODE:
2915 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2916
2917void
2918_set_current (SV *current)
1048 PROTOTYPE: $ 2919 PROTOTYPE: $
1049 CODE: 2920 CODE:
1050 api_ready (self); 2921 SvREFCNT_dec (SvRV (coro_current));
2922 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2923
2924void
2925_set_readyhook (SV *hook)
2926 PROTOTYPE: $
2927 CODE:
2928 SvREFCNT_dec (coro_readyhook);
2929 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1051 2930
1052int 2931int
2932prio (Coro::State coro, int newprio = 0)
2933 PROTOTYPE: $;$
2934 ALIAS:
2935 nice = 1
2936 CODE:
2937{
2938 RETVAL = coro->prio;
2939
2940 if (items > 1)
2941 {
2942 if (ix)
2943 newprio = coro->prio - newprio;
2944
2945 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2946 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2947
2948 coro->prio = newprio;
2949 }
2950}
2951 OUTPUT:
2952 RETVAL
2953
2954SV *
2955ready (SV *self)
2956 PROTOTYPE: $
2957 CODE:
2958 RETVAL = boolSV (api_ready (aTHX_ self));
2959 OUTPUT:
2960 RETVAL
2961
2962int
1053nready(...) 2963nready (...)
1054 PROTOTYPE: 2964 PROTOTYPE:
1055 CODE: 2965 CODE:
1056 RETVAL = coro_nready; 2966 RETVAL = coro_nready;
1057 OUTPUT: 2967 OUTPUT:
1058 RETVAL 2968 RETVAL
1059 2969
2970# for async_pool speedup
1060void 2971void
1061schedule(...) 2972_pool_1 (SV *cb)
1062 PROTOTYPE:
1063 ALIAS:
1064 cede = 1
1065 CODE: 2973 CODE:
1066 api_schedule (ix); 2974{
2975 HV *hv = (HV *)SvRV (coro_current);
2976 struct coro *coro = SvSTATE_hv ((SV *)hv);
2977 AV *defav = GvAV (PL_defgv);
2978 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2979 AV *invoke_av;
2980 int i, len;
1067 2981
2982 if (!invoke)
2983 {
2984 SV *old = PL_diehook;
2985 PL_diehook = 0;
2986 SvREFCNT_dec (old);
2987 croak ("\3async_pool terminate\2\n");
2988 }
2989
2990 SvREFCNT_dec (coro->saved_deffh);
2991 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2992
2993 hv_store (hv, "desc", sizeof ("desc") - 1,
2994 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2995
2996 invoke_av = (AV *)SvRV (invoke);
2997 len = av_len (invoke_av);
2998
2999 sv_setsv (cb, AvARRAY (invoke_av)[0]);
3000
3001 if (len > 0)
3002 {
3003 av_fill (defav, len - 1);
3004 for (i = 0; i < len; ++i)
3005 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
3006 }
3007}
3008
3009void
3010_pool_2 (SV *cb)
3011 CODE:
3012{
3013 HV *hv = (HV *)SvRV (coro_current);
3014 struct coro *coro = SvSTATE_hv ((SV *)hv);
3015
3016 sv_setsv (cb, &PL_sv_undef);
3017
3018 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
3019 coro->saved_deffh = 0;
3020
3021 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
3022 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3023 {
3024 SV *old = PL_diehook;
3025 PL_diehook = 0;
3026 SvREFCNT_dec (old);
3027 croak ("\3async_pool terminate\2\n");
3028 }
3029
3030 av_clear (GvAV (PL_defgv));
3031 hv_store (hv, "desc", sizeof ("desc") - 1,
3032 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3033
3034 coro->prio = 0;
3035
3036 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3037 api_trace (aTHX_ coro_current, 0);
3038
3039 av_push (av_async_pool, newSVsv (coro_current));
3040}
3041
3042SV *
3043rouse_cb ()
3044 PROTOTYPE:
3045 CODE:
3046 RETVAL = coro_new_rouse_cb (aTHX);
3047 OUTPUT:
3048 RETVAL
3049
3050void
3051rouse_wait (...)
3052 PROTOTYPE: ;$
3053 PPCODE:
3054 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3055
3056
3057MODULE = Coro::State PACKAGE = PerlIO::cede
3058
3059BOOT:
3060 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3061
3062
3063MODULE = Coro::State PACKAGE = Coro::Semaphore
3064
3065SV *
3066new (SV *klass, SV *count = 0)
3067 CODE:
3068 RETVAL = sv_bless (
3069 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3070 GvSTASH (CvGV (cv))
3071 );
3072 OUTPUT:
3073 RETVAL
3074
3075# helper for Coro::Channel
3076SV *
3077_alloc (int count)
3078 CODE:
3079 RETVAL = coro_waitarray_new (aTHX_ count);
3080 OUTPUT:
3081 RETVAL
3082
3083SV *
3084count (SV *self)
3085 CODE:
3086 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3087 OUTPUT:
3088 RETVAL
3089
3090void
3091up (SV *self, int adjust = 1)
3092 ALIAS:
3093 adjust = 1
3094 CODE:
3095 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3096
3097void
3098down (...)
3099 CODE:
3100 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3101
3102void
3103wait (...)
3104 CODE:
3105 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3106
3107void
3108try (SV *self)
3109 PPCODE:
3110{
3111 AV *av = (AV *)SvRV (self);
3112 SV *count_sv = AvARRAY (av)[0];
3113 IV count = SvIVX (count_sv);
3114
3115 if (count > 0)
3116 {
3117 --count;
3118 SvIVX (count_sv) = count;
3119 XSRETURN_YES;
3120 }
3121 else
3122 XSRETURN_NO;
3123}
3124
3125void
3126waiters (SV *self)
3127 PPCODE:
3128{
3129 AV *av = (AV *)SvRV (self);
3130 int wcount = AvFILLp (av) + 1 - 1;
3131
3132 if (GIMME_V == G_SCALAR)
3133 XPUSHs (sv_2mortal (newSViv (wcount)));
3134 else
3135 {
3136 int i;
3137 EXTEND (SP, wcount);
3138 for (i = 1; i <= wcount; ++i)
3139 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3140 }
3141}
3142
3143MODULE = Coro::State PACKAGE = Coro::Signal
3144
3145SV *
3146new (SV *klass)
3147 CODE:
3148 RETVAL = sv_bless (
3149 coro_waitarray_new (aTHX_ 0),
3150 GvSTASH (CvGV (cv))
3151 );
3152 OUTPUT:
3153 RETVAL
3154
3155void
3156wait (...)
3157 CODE:
3158 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3159
3160void
3161broadcast (SV *self)
3162 CODE:
3163{
3164 AV *av = (AV *)SvRV (self);
3165 coro_signal_wake (aTHX_ av, AvFILLp (av));
3166}
3167
3168void
3169send (SV *self)
3170 CODE:
3171{
3172 AV *av = (AV *)SvRV (self);
3173
3174 if (AvFILLp (av))
3175 coro_signal_wake (aTHX_ av, 1);
3176 else
3177 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3178}
3179
3180IV
3181awaited (SV *self)
3182 CODE:
3183 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3184 OUTPUT:
3185 RETVAL
3186
3187
3188MODULE = Coro::State PACKAGE = Coro::AnyEvent
3189
3190BOOT:
3191 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3192
3193void
3194_schedule (...)
3195 CODE:
3196{
3197 static int incede;
3198
3199 api_cede_notself (aTHX);
3200
3201 ++incede;
3202 while (coro_nready >= incede && api_cede (aTHX))
3203 ;
3204
3205 sv_setsv (sv_activity, &PL_sv_undef);
3206 if (coro_nready >= incede)
3207 {
3208 PUSHMARK (SP);
3209 PUTBACK;
3210 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3211 }
3212
3213 --incede;
3214}
3215
3216
3217MODULE = Coro::State PACKAGE = Coro::AIO
3218
3219void
3220_register (char *target, char *proto, SV *req)
3221 CODE:
3222{
3223 CV *req_cv = coro_sv_2cv (req);
3224 /* newXSproto doesn't return the CV on 5.8 */
3225 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3226 sv_setpv ((SV *)slf_cv, proto);
3227 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3228}
3229

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