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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 1.304 by root, Wed Nov 19 08:22:48 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
94 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
96}; 270};
97 271
98typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
100 274
101static AV *main_mainstack; /* used to differentiate between $main and others */ 275/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 276/* and get copied between struct coro and these variables */
103static SV *ucoro_state_sv; 277/* the mainr easonw e don't support windows process emulation */
104static U32 ucoro_state_hash; 278static 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}
789 279
790/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
791 281
792#define PRIO_MAX 3 282#define PRIO_MAX 3
793#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
795#define PRIO_LOW -1 285#define PRIO_LOW -1
796#define PRIO_IDLE -3 286#define PRIO_IDLE -3
797#define PRIO_MIN -4 287#define PRIO_MIN -4
798 288
799/* for Coro.pm */ 289/* for Coro.pm */
800static GV *coro_current, *coro_idle; 290static SV *coro_current;
291static SV *coro_readyhook;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
802static int coro_nready; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
803 295
804static void 296/** lowlevel stuff **********************************************************/
805coro_enq (SV *sv) 297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
806{ 300{
807 if (SvROK (sv)) 301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
329coro_clone_padlist (pTHX_ CV *cv)
330{
331 AV *padlist = CvPADLIST (cv);
332 AV *newpadlist, *newpad;
333
334 newpadlist = newAV ();
335 AvREAL_off (newpadlist);
336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist);
343
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
345 av_store (newpadlist, 1, (SV *)newpad);
346
347 return newpadlist;
348}
349
350static void
351free_padlist (pTHX_ AV *padlist)
352{
353 /* may be during global destruction */
354 if (SvREFCNT (padlist))
808 { 355 {
809 SV *hv = SvRV (sv); 356 I32 i = AvFILLp (padlist);
810 if (SvTYPE (hv) == SVt_PVHV) 357 while (i >= 0)
811 { 358 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 359 SV **svp = av_fetch (padlist, i--, FALSE);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 360 if (svp)
361 {
362 SV *sv;
363 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
364 SvREFCNT_dec (sv);
814 365
815 prio = prio > PRIO_MAX ? PRIO_MAX 366 SvREFCNT_dec (*svp);
816 : prio < PRIO_MIN ? PRIO_MIN 367 }
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 } 368 }
369
370 SvREFCNT_dec ((SV*)padlist);
371 }
372}
373
374static int
375coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
376{
377 AV *padlist;
378 AV *av = (AV *)mg->mg_obj;
379
380 /* casting is fun. */
381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
382 free_padlist (aTHX_ padlist);
383
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385
386 return 0;
387}
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
399 ? SvMAGIC (sv) \
400 : mg_find (sv, type))
401
402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
405 : 0)
406
407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
439
440/* the next two functions merely cache the padlists */
441static void
442get_padlist (pTHX_ CV *cv)
443{
444 MAGIC *mg = CORO_MAGIC_cv (cv);
445 AV *av;
446
447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
449 else
450 {
451#if CORO_PREFER_PERL_FUNCTIONS
452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
454 CV *cp = Perl_cv_clone (cv);
455 CvPADLIST (cv) = CvPADLIST (cp);
456 CvPADLIST (cp) = 0;
457 SvREFCNT_dec (cp);
458#else
459 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
460#endif
824 } 461 }
825
826 croak ("Coro::ready tried to enqueue something that is not a coroutine");
827} 462}
828 463
464static void
465put_padlist (pTHX_ CV *cv)
466{
467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
469
470 if (expect_false (!mg))
471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
472
473 av = (AV *)mg->mg_obj;
474
475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
476 av_extend (av, AvMAX (av) + 1);
477
478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
479}
480
481/** load & save, init *******************************************************/
482
483static void
484load_perl (pTHX_ Coro__State c)
485{
486 perl_slots *slot = c->slot;
487 c->slot = 0;
488
489 PL_mainstack = c->mainstack;
490
491 GvSV (PL_defgv) = slot->defsv;
492 GvAV (PL_defgv) = slot->defav;
493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
496 #define VAR(name,type) PL_ ## name = slot->name;
497 # include "state.h"
498 #undef VAR
499
500 {
501 dSP;
502
503 CV *cv;
504
505 /* now do the ugly restore mess */
506 while (expect_true (cv = (CV *)POPs))
507 {
508 put_padlist (aTHX_ cv); /* mark this padlist as available */
509 CvDEPTH (cv) = PTR2IV (POPs);
510 CvPADLIST (cv) = (AV *)POPs;
511 }
512
513 PUTBACK;
514 }
515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
520static void
521save_perl (pTHX_ Coro__State c)
522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
526 {
527 dSP;
528 I32 cxix = cxstack_ix;
529 PERL_CONTEXT *ccstk = cxstack;
530 PERL_SI *top_si = PL_curstackinfo;
531
532 /*
533 * the worst thing you can imagine happens first - we have to save
534 * (and reinitialize) all cv's in the whole callchain :(
535 */
536
537 XPUSHs (Nullsv);
538 /* this loop was inspired by pp_caller */
539 for (;;)
540 {
541 while (expect_true (cxix >= 0))
542 {
543 PERL_CONTEXT *cx = &ccstk[cxix--];
544
545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
546 {
547 CV *cv = cx->blk_sub.cv;
548
549 if (expect_true (CvDEPTH (cv)))
550 {
551 EXTEND (SP, 3);
552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
554 PUSHs ((SV *)cv);
555
556 CvDEPTH (cv) = 0;
557 get_padlist (aTHX_ cv);
558 }
559 }
560 }
561
562 if (expect_true (top_si->si_type == PERLSI_MAIN))
563 break;
564
565 top_si = top_si->si_prev;
566 ccstk = top_si->si_cxstack;
567 cxix = top_si->si_cxix;
568 }
569
570 PUTBACK;
571 }
572
573 /* allocate some space on the context stack for our purposes */
574 /* we manually unroll here, as usually 2 slots is enough */
575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
590 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV;
592 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv);
594
595 #define VAR(name,type) slot->name = PL_ ## name;
596 # include "state.h"
597 #undef VAR
598 }
599}
600
601/*
602 * allocate various perl stacks. This is almost an exact copy
603 * of perl.c:init_stacks, except that it uses less memory
604 * on the (sometimes correct) assumption that coroutines do
605 * not usually need a lot of stackspace.
606 */
607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks init_stacks
609#else
610static void
611coro_init_stacks (pTHX)
612{
613 PL_curstackinfo = new_stackinfo(32, 8);
614 PL_curstackinfo->si_type = PERLSI_MAIN;
615 PL_curstack = PL_curstackinfo->si_stack;
616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
617
618 PL_stack_base = AvARRAY(PL_curstack);
619 PL_stack_sp = PL_stack_base;
620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
621
622 New(50,PL_tmps_stack,32,SV*);
623 PL_tmps_floor = -1;
624 PL_tmps_ix = -1;
625 PL_tmps_max = 32;
626
627 New(54,PL_markstack,16,I32);
628 PL_markstack_ptr = PL_markstack;
629 PL_markstack_max = PL_markstack + 16;
630
631#ifdef SET_MARK_OFFSET
632 SET_MARK_OFFSET;
633#endif
634
635 New(54,PL_scopestack,8,I32);
636 PL_scopestack_ix = 0;
637 PL_scopestack_max = 8;
638
639 New(54,PL_savestack,24,ANY);
640 PL_savestack_ix = 0;
641 PL_savestack_max = 24;
642
643#if !PERL_VERSION_ATLEAST (5,10,0)
644 New(54,PL_retstack,4,OP*);
645 PL_retstack_ix = 0;
646 PL_retstack_max = 4;
647#endif
648}
649#endif
650
651/*
652 * destroy the stacks, the callchain etc...
653 */
654static void
655coro_destruct_stacks (pTHX)
656{
657 while (PL_curstackinfo->si_next)
658 PL_curstackinfo = PL_curstackinfo->si_next;
659
660 while (PL_curstackinfo)
661 {
662 PERL_SI *p = PL_curstackinfo->si_prev;
663
664 if (!IN_DESTRUCT)
665 SvREFCNT_dec (PL_curstackinfo->si_stack);
666
667 Safefree (PL_curstackinfo->si_cxstack);
668 Safefree (PL_curstackinfo);
669 PL_curstackinfo = p;
670 }
671
672 Safefree (PL_tmps_stack);
673 Safefree (PL_markstack);
674 Safefree (PL_scopestack);
675 Safefree (PL_savestack);
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 Safefree (PL_retstack);
678#endif
679}
680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
692 {
693 slot = &tmp_slot;
694
695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
698 }
699 else
700 slot = coro->slot;
701
702 if (slot)
703 {
704 rss += sizeof (slot->curstackinfo);
705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
715 }
716 }
717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro)
830{
831 /*
832 * emulate part of the perl startup here.
833 */
834 coro_init_stacks (aTHX);
835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
915 SvREFCNT_dec (GvAV (PL_defgv));
916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
920
921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
927
928 coro_destruct_stacks (aTHX);
929}
930
931INLINE void
932free_coro_mortal (pTHX)
933{
934 if (expect_true (coro_mortal))
935 {
936 SvREFCNT_dec (coro_mortal);
937 coro_mortal = 0;
938 }
939}
940
941static int
942runops_trace (pTHX)
943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
948
949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
950 {
951 PERL_ASYNC_CHECK ();
952
953 if (cctx->flags & CC_TRACE_ALL)
954 {
955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
956 {
957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
958 SV **bot, **top;
959 AV *av = newAV (); /* return values */
960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
999 {
1000 SV **cb;
1001
1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1003 {
1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1005
1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1007 {
1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
1034 }
1035
1036 if (cctx->flags & CC_TRACE_LINE)
1037 {
1038 dSP;
1039
1040 PL_runops = RUNOPS_DEFAULT;
1041 ENTER;
1042 SAVETMPS;
1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
1055 }
1056 }
1057 }
1058 }
1059 }
1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1084static void NOINLINE
1085cctx_prepare (pTHX_ coro_cctx *cctx)
1086{
1087 PL_top_env = &PL_start_env;
1088
1089 if (cctx->flags & CC_TRACE)
1090 PL_runops = runops_trace;
1091
1092 /* we already must be executing an SLF op, there is no other valid way
1093 * that can lead to creation of a new cctx */
1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1096
1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1098 cctx_ssl_cctx = cctx;
1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
1110}
1111
1112/*
1113 * this is a _very_ stripped down perl interpreter ;)
1114 */
1115static void
1116cctx_run (void *arg)
1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
1124 dTHX;
1125
1126 /* normally we would need to skip the entersub here */
1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
1129
1130 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
1136 /* somebody or something will hit me for both perl_run and PL_restartop */
1137 PL_restartop = PL_op;
1138 perl_run (PL_curinterp);
1139
1140 /*
1141 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
1146 */
1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
1150}
1151
1152static coro_cctx *
1153cctx_new ()
1154{
1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1184 void *stack_start;
1185 size_t stack_size;
1186
1187#if HAVE_MMAP
1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1189 /* mmap supposedly does allocate-on-write for us */
1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1191
1192 if (cctx->sptr != (void *)-1)
1193 {
1194 #if CORO_STACKGUARD
1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1196 #endif
1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1199 cctx->flags |= CC_MAPPED;
1200 }
1201 else
1202#endif
1203 {
1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1205 New (0, cctx->sptr, cctx_stacksize, long);
1206
1207 if (!cctx->sptr)
1208 {
1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1210 _exit (EXIT_FAILURE);
1211 }
1212
1213 stack_start = cctx->sptr;
1214 stack_size = cctx->ssize;
1215 }
1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1222
1223 return cctx;
1224}
1225
1226static void
1227cctx_destroy (coro_cctx *cctx)
1228{
1229 if (!cctx)
1230 return;
1231
1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1240 #endif
1241
1242#if HAVE_MMAP
1243 if (cctx->flags & CC_MAPPED)
1244 munmap (cctx->sptr, cctx->ssize);
1245 else
1246#endif
1247 Safefree (cctx->sptr);
1248 }
1249
1250 Safefree (cctx);
1251}
1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
1256static coro_cctx *
1257cctx_get (pTHX)
1258{
1259 while (expect_true (cctx_first))
1260 {
1261 coro_cctx *cctx = cctx_first;
1262 cctx_first = cctx->next;
1263 --cctx_idle;
1264
1265 if (expect_true (!CCTX_EXPIRED (cctx)))
1266 return cctx;
1267
1268 cctx_destroy (cctx);
1269 }
1270
1271 return cctx_new_run ();
1272}
1273
1274static void
1275cctx_put (coro_cctx *cctx)
1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
1279 /* free another cctx if overlimit */
1280 if (expect_false (cctx_idle >= cctx_max_idle))
1281 {
1282 coro_cctx *first = cctx_first;
1283 cctx_first = first->next;
1284 --cctx_idle;
1285
1286 cctx_destroy (first);
1287 }
1288
1289 ++cctx_idle;
1290 cctx->next = cctx_first;
1291 cctx_first = cctx;
1292}
1293
1294/** coroutine switching *****************************************************/
1295
1296static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1322{
1323 dSTACKLEVEL;
1324
1325 /* sometimes transfer is only called to set idle_sp */
1326 if (expect_false (!next))
1327 {
1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1330 }
1331 else if (expect_true (prev != next))
1332 {
1333 coro_cctx *prev__cctx;
1334
1335 if (expect_false (prev->flags & CF_NEW))
1336 {
1337 /* create a new empty/source context */
1338 prev->cctx = cctx_new_empty ();
1339 prev->flags &= ~CF_NEW;
1340 prev->flags |= CF_RUNNING;
1341 }
1342
1343 prev->flags &= ~CF_RUNNING;
1344 next->flags |= CF_RUNNING;
1345
1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
1348
1349 if (expect_false (next->flags & CF_NEW))
1350 {
1351 /* need to start coroutine */
1352 next->flags &= ~CF_NEW;
1353 /* setup coroutine call */
1354 coro_setup (aTHX_ next);
1355 }
1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
1367 {
1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370
1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
1379 cctx_put (prev__cctx);
1380 }
1381
1382 ++next->usecount;
1383
1384 if (expect_true (!next->cctx))
1385 next->cctx = cctx_get (aTHX);
1386
1387 if (expect_false (prev__cctx != next->cctx))
1388 {
1389 prev__cctx->top_env = PL_top_env;
1390 PL_top_env = next->cctx->top_env;
1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1392 }
1393
1394 transfer_tail (aTHX);
1395 }
1396}
1397
1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1400
1401/** high level stuff ********************************************************/
1402
1403static int
1404coro_state_destroy (pTHX_ struct coro *coro)
1405{
1406 if (coro->flags & CF_DESTROYED)
1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1411
1412 coro->flags |= CF_DESTROYED;
1413
1414 if (coro->flags & CF_READY)
1415 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */
1418 --coro_nready;
1419 }
1420 else
1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1422
1423 if (coro->mainstack && coro->mainstack != main_mainstack)
1424 {
1425 struct coro temp;
1426
1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1428
1429 save_perl (aTHX_ &temp);
1430 load_perl (aTHX_ coro);
1431
1432 coro_destruct (aTHX_ coro);
1433
1434 load_perl (aTHX_ &temp);
1435
1436 coro->slot = 0;
1437 }
1438
1439 cctx_destroy (coro->cctx);
1440 SvREFCNT_dec (coro->args);
1441
1442 if (coro->next) coro->next->prev = coro->prev;
1443 if (coro->prev) coro->prev->next = coro->next;
1444 if (coro == coro_first) coro_first = coro->next;
1445
1446 return 1;
1447}
1448
1449static int
1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1451{
1452 struct coro *coro = (struct coro *)mg->mg_ptr;
1453 mg->mg_ptr = 0;
1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
1462
1463 return 0;
1464}
1465
1466static int
1467coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1468{
1469 struct coro *coro = (struct coro *)mg->mg_ptr;
1470
1471 ++coro->refcnt;
1472
1473 return 0;
1474}
1475
1476static MGVTBL coro_state_vtbl = {
1477 0, 0, 0, 0,
1478 coro_state_free,
1479 0,
1480#ifdef MGf_DUP
1481 coro_state_dup,
1482#else
1483# define MGf_DUP 0
1484#endif
1485};
1486
1487static void
1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1489{
1490 ta->prev = SvSTATE (prev_sv);
1491 ta->next = SvSTATE (next_sv);
1492 TRANSFER_CHECK (*ta);
1493}
1494
1495static void
1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1497{
1498 struct coro_transfer_args ta;
1499
1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1501 TRANSFER (ta, 1);
1502}
1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
829static SV * 1512static SV *
830coro_deq (int min_prio) 1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
831{ 1514{
832 int prio = PRIO_MAX - PRIO_MIN; 1515 CV *cv = (CV *)newSV (0);
833 1516
834 min_prio -= PRIO_MIN; 1517 sv_upgrade ((SV *)cv, SVt_PVCV);
835 if (min_prio < 0)
836 min_prio = 0;
837 1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
1525}
1526
1527/** Coro ********************************************************************/
1528
1529INLINE void
1530coro_enq (pTHX_ struct coro *coro)
1531{
1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1533}
1534
1535INLINE SV *
1536coro_deq (pTHX)
1537{
1538 int prio;
1539
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
839 if (av_len (coro_ready[prio]) >= 0) 1541 if (AvFILLp (coro_ready [prio]) >= 0)
840 {
841 coro_nready--;
842 return av_shift (coro_ready[prio]); 1542 return av_shift (coro_ready [prio]);
843 }
844 1543
845 return 0; 1544 return 0;
846} 1545}
847 1546
848static void 1547static int
849api_ready (SV *coro) 1548api_ready (pTHX_ SV *coro_sv)
850{ 1549{
851 coro_enq (SvREFCNT_inc (coro)); 1550 struct coro *coro;
852} 1551 SV *sv_hook;
1552 void (*xs_hook)(void);
853 1553
1554 if (SvROK (coro_sv))
1555 coro_sv = SvRV (coro_sv);
1556
1557 coro = SvSTATE (coro_sv);
1558
1559 if (coro->flags & CF_READY)
1560 return 0;
1561
1562 coro->flags |= CF_READY;
1563
1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1566
1567 coro_enq (aTHX_ coro);
1568 ++coro_nready;
1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
1583 }
1584
1585 if (xs_hook)
1586 xs_hook ();
1587
1588 return 1;
1589}
1590
854static void 1591static int
855api_schedule (int cede) 1592api_is_ready (pTHX_ SV *coro_sv)
856{ 1593{
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1599{
857 SV *prev, *next; 1600 SV *prev_sv, *next_sv;
858 1601
1602 for (;;)
1603 {
1604 next_sv = coro_deq (aTHX);
1605
1606 /* nothing to schedule: call the idle handler */
1607 if (expect_false (!next_sv))
1608 {
1609 dSP;
1610
1611 ENTER;
1612 SAVETMPS;
1613
1614 PUSHMARK (SP);
1615 PUTBACK;
1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE_hv (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 break;
1635 }
1636
1637 /* free this only after the transfer */
859 prev = GvSV (coro_current); 1638 prev_sv = SvRV (coro_current);
1639 ta->prev = SvSTATE_hv (prev_sv);
1640 TRANSFER_CHECK (*ta);
1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1642 ta->next->flags &= ~CF_READY;
1643 SvRV_set (coro_current, next_sv);
860 1644
861 if (cede) 1645 free_coro_mortal (aTHX);
862 coro_enq (SvREFCNT_inc (prev)); 1646 coro_mortal = prev_sv;
1647}
863 1648
864 next = coro_deq (PRIO_MIN); 1649INLINE void
1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1651{
1652 api_ready (aTHX_ coro_current);
1653 prepare_schedule (aTHX_ ta);
1654}
865 1655
866 if (!next) 1656INLINE void
867 next = SvREFCNT_inc (GvSV (coro_idle)); 1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
868 1660
869 GvSV (coro_current) = SvREFCNT_inc (next); 1661 if (coro_nready)
870 transfer (aTHX_ 1662 {
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1663 prepare_schedule (aTHX_ ta);
872 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1664 api_ready (aTHX_ prev);
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1679static int
1680api_cede (pTHX)
1681{
1682 struct coro_transfer_args ta;
1683
1684 prepare_cede (aTHX_ &ta);
1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
1689 return 1;
1690 }
1691 else
1692 return 0;
1693}
1694
1695static int
1696api_cede_notself (pTHX)
1697{
1698 if (coro_nready)
1699 {
1700 struct coro_transfer_args ta;
1701
1702 prepare_cede_notself (aTHX_ &ta);
1703 TRANSFER (ta, 1);
1704 return 1;
1705 }
1706 else
1707 return 0;
1708}
1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1763}
1764
1765static int
1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1767{
1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
1827}
1828
1829static SV *
1830coro_new_rouse_cb (pTHX)
1831{
1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1836
1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1838 SvREFCNT_dec (data); /* magicext increases the refcount */
1839
1840 SvREFCNT_dec (coro->rouse_cb);
1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
1946 {
1947 /* ampersand-form of call, use @_ instead of stack */
1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1969 struct coro_transfer_args ta;
1970
1971 slf_frame.prepare (aTHX_ &ta);
1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 SvPV_set ((SV *)av, (char *)ary); /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2149 AvMAX (av) = 1;
2150 AvFILLp (av) = 0;
2151 ary [0] = newSViv (count);
2152
2153 return newRV_noinc ((SV *)av);
2154}
2155
2156/* semaphore */
2157
2158static void
2159coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2160{
2161 SV *count_sv = AvARRAY (av)[0];
2162 IV count = SvIVX (count_sv);
2163
2164 count += adjust;
2165 SvIVX (count_sv) = count;
2166
2167 /* now wake up as many waiters as are expected to lock */
2168 while (count > 0 && AvFILLp (av) > 0)
2169 {
2170 SV *cb;
2171
2172 /* swap first two elements so we can shift a waiter */
2173 AvARRAY (av)[0] = AvARRAY (av)[1];
2174 AvARRAY (av)[1] = count_sv;
2175 cb = av_shift (av);
2176
2177 if (SvOBJECT (cb))
2178 api_ready (aTHX_ cb);
2179 else
2180 croak ("callbacks not yet supported");
2181
874 SvREFCNT_dec (next); 2182 SvREFCNT_dec (cb);
2183
2184 --count;
2185 }
2186}
2187
2188static void
2189coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2190{
2191 /* call $sem->adjust (0) to possibly wake up some other waiters */
2192 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2193}
2194
2195static int
2196slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2197{
2198 AV *av = (AV *)frame->data;
2199 SV *count_sv = AvARRAY (av)[0];
2200
2201 /* if we are about to throw, don't actually acquire the lock, just throw */
2202 if (CORO_THROW)
2203 return 0;
2204 else if (SvIVX (count_sv) > 0)
2205 {
2206 SvSTATE_current->on_destroy = 0;
2207
2208 if (acquire)
2209 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2210 else
2211 coro_semaphore_adjust (aTHX_ av, 0);
2212
2213 return 0;
2214 }
2215 else
2216 {
2217 int i;
2218 /* if we were woken up but can't down, we look through the whole */
2219 /* waiters list and only add us if we aren't in there already */
2220 /* this avoids some degenerate memory usage cases */
2221
2222 for (i = 1; i <= AvFILLp (av); ++i)
2223 if (AvARRAY (av)[i] == SvRV (coro_current))
2224 return 1;
2225
2226 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2227 return 1;
2228 }
2229}
2230
2231static int
2232slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2235}
2236
2237static int
2238slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2239{
2240 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2241}
2242
2243static void
2244slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 AV *av = (AV *)SvRV (arg [0]);
2247
2248 if (SvIVX (AvARRAY (av)[0]) > 0)
2249 {
2250 frame->data = (void *)av;
2251 frame->prepare = prepare_nop;
2252 }
2253 else
2254 {
2255 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2256
2257 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2258 frame->prepare = prepare_schedule;
2259
2260 /* to avoid race conditions when a woken-up coro gets terminated */
2261 /* we arrange for a temporary on_destroy that calls adjust (0) */
2262 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2263 }
2264}
2265
2266static void
2267slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2270 frame->check = slf_check_semaphore_down;
2271}
2272
2273static void
2274slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2275{
2276 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2277 frame->check = slf_check_semaphore_wait;
2278}
2279
2280/* signal */
2281
2282static void
2283coro_signal_wake (pTHX_ AV *av, int count)
2284{
2285 SvIVX (AvARRAY (av)[0]) = 0;
2286
2287 /* now signal count waiters */
2288 while (count > 0 && AvFILLp (av) > 0)
2289 {
2290 SV *cb;
2291
2292 /* swap first two elements so we can shift a waiter */
2293 cb = AvARRAY (av)[0];
2294 AvARRAY (av)[0] = AvARRAY (av)[1];
2295 AvARRAY (av)[1] = cb;
2296
2297 cb = av_shift (av);
2298
2299 api_ready (aTHX_ cb);
2300 sv_setiv (cb, 0); /* signal waiter */
2301 SvREFCNT_dec (cb);
2302
2303 --count;
2304 }
2305}
2306
2307static int
2308slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2309{
2310 /* if we are about to throw, also stop waiting */
2311 return SvROK ((SV *)frame->data) && !CORO_THROW;
2312}
2313
2314static void
2315slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 AV *av = (AV *)SvRV (arg [0]);
2318
2319 if (SvIVX (AvARRAY (av)[0]))
2320 {
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322 frame->prepare = prepare_nop;
2323 frame->check = slf_check_nop;
2324 }
2325 else
2326 {
2327 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2328
2329 av_push (av, waiter);
2330
2331 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2332 frame->prepare = prepare_schedule;
2333 frame->check = slf_check_signal_wait;
2334 }
2335}
2336
2337/*****************************************************************************/
2338/* Coro::AIO */
2339
2340#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2341
2342/* helper storage struct */
2343struct io_state
2344{
2345 int errorno;
2346 I32 laststype; /* U16 in 5.10.0 */
2347 int laststatval;
2348 Stat_t statcache;
2349};
2350
2351static void
2352coro_aio_callback (pTHX_ CV *cv)
2353{
2354 dXSARGS;
2355 AV *state = (AV *)GENSUB_ARG;
2356 SV *coro = av_pop (state);
2357 SV *data_sv = newSV (sizeof (struct io_state));
2358
2359 av_extend (state, items);
2360
2361 sv_upgrade (data_sv, SVt_PV);
2362 SvCUR_set (data_sv, sizeof (struct io_state));
2363 SvPOK_only (data_sv);
2364
2365 {
2366 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2367
2368 data->errorno = errno;
2369 data->laststype = PL_laststype;
2370 data->laststatval = PL_laststatval;
2371 data->statcache = PL_statcache;
2372 }
2373
2374 /* now build the result vector out of all the parameters and the data_sv */
2375 {
2376 int i;
2377
2378 for (i = 0; i < items; ++i)
2379 av_push (state, SvREFCNT_inc_NN (ST (i)));
2380 }
2381
2382 av_push (state, data_sv);
2383
2384 api_ready (aTHX_ coro);
875 SvREFCNT_dec (prev); 2385 SvREFCNT_dec (coro);
2386 SvREFCNT_dec ((AV *)state);
876} 2387}
877 2388
2389static int
2390slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2391{
2392 AV *state = (AV *)frame->data;
2393
2394 /* if we are about to throw, return early */
2395 /* this does not cancel the aio request, but at least */
2396 /* it quickly returns */
2397 if (CORO_THROW)
2398 return 0;
2399
2400 /* one element that is an RV? repeat! */
2401 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2402 return 1;
2403
2404 /* restore status */
2405 {
2406 SV *data_sv = av_pop (state);
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 errno = data->errorno;
2410 PL_laststype = data->laststype;
2411 PL_laststatval = data->laststatval;
2412 PL_statcache = data->statcache;
2413
2414 SvREFCNT_dec (data_sv);
2415 }
2416
2417 /* push result values */
2418 {
2419 dSP;
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (state) + 1);
2423 for (i = 0; i <= AvFILLp (state); ++i)
2424 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2425
2426 PUTBACK;
2427 }
2428
2429 return 0;
2430}
2431
2432static void
2433slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2434{
2435 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2436 SV *coro_hv = SvRV (coro_current);
2437 struct coro *coro = SvSTATE_hv (coro_hv);
2438
2439 /* put our coroutine id on the state arg */
2440 av_push (state, SvREFCNT_inc_NN (coro_hv));
2441
2442 /* first see whether we have a non-zero priority and set it as AIO prio */
2443 if (coro->prio)
2444 {
2445 dSP;
2446
2447 static SV *prio_cv;
2448 static SV *prio_sv;
2449
2450 if (expect_false (!prio_cv))
2451 {
2452 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2453 prio_sv = newSViv (0);
2454 }
2455
2456 PUSHMARK (SP);
2457 sv_setiv (prio_sv, coro->prio);
2458 XPUSHs (prio_sv);
2459
2460 PUTBACK;
2461 call_sv (prio_cv, G_VOID | G_DISCARD);
2462 }
2463
2464 /* now call the original request */
2465 {
2466 dSP;
2467 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2468 int i;
2469
2470 PUSHMARK (SP);
2471
2472 /* first push all args to the stack */
2473 EXTEND (SP, items + 1);
2474
2475 for (i = 0; i < items; ++i)
2476 PUSHs (arg [i]);
2477
2478 /* now push the callback closure */
2479 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2480
2481 /* now call the AIO function - we assume our request is uncancelable */
2482 PUTBACK;
2483 call_sv ((SV *)req, G_VOID | G_DISCARD);
2484 }
2485
2486 /* now that the requets is going, we loop toll we have a result */
2487 frame->data = (void *)state;
2488 frame->prepare = prepare_schedule;
2489 frame->check = slf_check_aio_req;
2490}
2491
2492static void
2493coro_aio_req_xs (pTHX_ CV *cv)
2494{
2495 dXSARGS;
2496
2497 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2498
2499 XSRETURN_EMPTY;
2500}
2501
2502/*****************************************************************************/
2503
878MODULE = Coro::State PACKAGE = Coro::State 2504MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 2505
880PROTOTYPES: ENABLE 2506PROTOTYPES: DISABLE
881 2507
882BOOT: 2508BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 2509{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2510#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2511# if CORO_PTHREAD
2512 coro_thx = PERL_GET_CONTEXT;
2513# endif
2514#endif
2515 BOOT_PAGESIZE;
2516
2517 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2518 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2519
2520 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2521 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2522 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2523
2524 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2525 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2526 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2527
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2528 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 2529
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2530 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2531 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2532 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2533 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 2534
896 main_mainstack = PL_mainstack; 2535 main_mainstack = PL_mainstack;
2536 main_top_env = PL_top_env;
897 2537
2538 while (main_top_env->je_prev)
2539 main_top_env = main_top_env->je_prev;
2540
2541 {
2542 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2543
2544 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2545 hv_store_ent (PL_custom_op_names, slf,
2546 newSVpv ("coro_slf", 0), 0);
2547
2548 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2549 hv_store_ent (PL_custom_op_descs, slf,
2550 newSVpv ("coro schedule like function", 0), 0);
2551 }
2552
898 coroapi.ver = CORO_API_VERSION; 2553 coroapi.ver = CORO_API_VERSION;
2554 coroapi.rev = CORO_API_REVISION;
2555
899 coroapi.transfer = api_transfer; 2556 coroapi.transfer = api_transfer;
900}
901 2557
902Coro::State 2558 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 2559 coroapi.execute_slf = api_execute_slf;
904 SV * args 2560 coroapi.prepare_nop = prepare_nop;
905 PROTOTYPE: $ 2561 coroapi.prepare_schedule = prepare_schedule;
2562 coroapi.prepare_cede = prepare_cede;
2563 coroapi.prepare_cede_notself = prepare_cede_notself;
2564
2565 {
2566 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2567
2568 if (!svp) croak ("Time::HiRes is required");
2569 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2570
2571 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2572 }
2573
2574 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2575}
2576
2577SV *
2578new (char *klass, ...)
906 CODE: 2579 CODE:
907 Coro__State coro; 2580{
2581 struct coro *coro;
2582 MAGIC *mg;
2583 HV *hv;
2584 int i;
908 2585
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910 croak ("Coro::State::_newprocess expects an arrayref");
911
912 New (0, coro, 1, struct coro); 2586 Newz (0, coro, 1, struct coro);
2587 coro->args = newAV ();
2588 coro->flags = CF_NEW;
913 2589
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2590 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 2591 coro->next = coro_first;
916 coro->stack = 0; 2592 coro_first = coro;
917 2593
918 RETVAL = coro; 2594 coro->hv = hv = newHV ();
2595 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2596 mg->mg_flags |= MGf_DUP;
2597 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2598
2599 av_extend (coro->args, items - 1);
2600 for (i = 1; i < items; i++)
2601 av_push (coro->args, newSVsv (ST (i)));
2602}
919 OUTPUT: 2603 OUTPUT:
920 RETVAL 2604 RETVAL
921 2605
922void 2606void
923transfer(prev, next, flags) 2607transfer (...)
924 Coro::State_or_hashref prev
925 Coro::State_or_hashref next
926 int flags
927 PROTOTYPE: @ 2608 PROTOTYPE: $$
928 CODE: 2609 CODE:
929 PUTBACK; 2610 CORO_EXECUTE_SLF_XS (slf_init_transfer);
930 transfer (aTHX_ prev, next, flags); 2611
931 SPAGAIN; 2612bool
2613_destroy (SV *coro_sv)
2614 CODE:
2615 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2616 OUTPUT:
2617 RETVAL
932 2618
933void 2619void
934DESTROY(coro) 2620_exit (int code)
935 Coro::State coro 2621 PROTOTYPE: $
936 CODE: 2622 CODE:
2623 _exit (code);
937 2624
938 if (coro->mainstack && coro->mainstack != main_mainstack) 2625int
2626cctx_stacksize (int new_stacksize = 0)
2627 PROTOTYPE: ;$
2628 CODE:
2629 RETVAL = cctx_stacksize;
2630 if (new_stacksize)
2631 {
2632 cctx_stacksize = new_stacksize;
2633 ++cctx_gen;
2634 }
2635 OUTPUT:
2636 RETVAL
2637
2638int
2639cctx_max_idle (int max_idle = 0)
2640 PROTOTYPE: ;$
2641 CODE:
2642 RETVAL = cctx_max_idle;
2643 if (max_idle > 1)
2644 cctx_max_idle = max_idle;
2645 OUTPUT:
2646 RETVAL
2647
2648int
2649cctx_count ()
2650 PROTOTYPE:
2651 CODE:
2652 RETVAL = cctx_count;
2653 OUTPUT:
2654 RETVAL
2655
2656int
2657cctx_idle ()
2658 PROTOTYPE:
2659 CODE:
2660 RETVAL = cctx_idle;
2661 OUTPUT:
2662 RETVAL
2663
2664void
2665list ()
2666 PROTOTYPE:
2667 PPCODE:
2668{
2669 struct coro *coro;
2670 for (coro = coro_first; coro; coro = coro->next)
2671 if (coro->hv)
2672 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2673}
2674
2675void
2676call (Coro::State coro, SV *coderef)
2677 ALIAS:
2678 eval = 1
2679 CODE:
2680{
2681 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
939 { 2682 {
940 struct coro temp; 2683 struct coro temp;
941 2684
2685 if (!(coro->flags & CF_RUNNING))
2686 {
2687 PUTBACK;
2688 save_perl (aTHX_ &temp);
2689 load_perl (aTHX_ coro);
2690 }
2691
2692 {
2693 dSP;
2694 ENTER;
2695 SAVETMPS;
942 PUTBACK; 2696 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2697 PUSHSTACK;
944 LOAD(aTHX_ coro); 2698 PUSHMARK (SP);
2699
2700 if (ix)
2701 eval_sv (coderef, 0);
2702 else
2703 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2704
2705 POPSTACK;
945 SPAGAIN; 2706 SPAGAIN;
2707 FREETMPS;
2708 LEAVE;
2709 PUTBACK;
2710 }
946 2711
947 destroy_stacks (aTHX); 2712 if (!(coro->flags & CF_RUNNING))
948 2713 {
949 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2714 save_perl (aTHX_ coro);
2715 load_perl (aTHX_ &temp);
950 SPAGAIN; 2716 SPAGAIN;
951 2717 }
952 coro->mainstack = 0;
953 } 2718 }
2719}
954 2720
955 deallocate_stack (coro); 2721SV *
956 2722is_ready (Coro::State coro)
957 Safefree (coro); 2723 PROTOTYPE: $
2724 ALIAS:
2725 is_ready = CF_READY
2726 is_running = CF_RUNNING
2727 is_new = CF_NEW
2728 is_destroyed = CF_DESTROYED
2729 CODE:
2730 RETVAL = boolSV (coro->flags & ix);
2731 OUTPUT:
2732 RETVAL
958 2733
959void 2734void
960flush() 2735throw (Coro::State self, SV *throw = &PL_sv_undef)
961 CODE: 2736 PROTOTYPE: $;$
962#ifdef MAY_FLUSH 2737 CODE:
963 flush_padlist_cache (); 2738{
964#endif 2739 struct coro *current = SvSTATE_current;
2740 SV **throwp = self == current ? &CORO_THROW : &self->except;
2741 SvREFCNT_dec (*throwp);
2742 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2743}
965 2744
966void 2745void
967_exit(code) 2746api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
968 int code 2747 PROTOTYPE: $;$
2748 C_ARGS: aTHX_ coro, flags
2749
2750SV *
2751has_cctx (Coro::State coro)
969 PROTOTYPE: $ 2752 PROTOTYPE: $
970 CODE: 2753 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 2754 RETVAL = boolSV (!!coro->cctx);
972 _exit (code); 2755 OUTPUT:
973#else 2756 RETVAL
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 2757
979MODULE = Coro::State PACKAGE = Coro::Cont 2758int
2759is_traced (Coro::State coro)
2760 PROTOTYPE: $
2761 CODE:
2762 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2763 OUTPUT:
2764 RETVAL
980 2765
981# this is slightly dirty (should expose a c-level api) 2766UV
2767rss (Coro::State coro)
2768 PROTOTYPE: $
2769 ALIAS:
2770 usecount = 1
2771 CODE:
2772 switch (ix)
2773 {
2774 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2775 case 1: RETVAL = coro->usecount; break;
2776 }
2777 OUTPUT:
2778 RETVAL
982 2779
983void 2780void
984yield(...) 2781force_cctx ()
2782 PROTOTYPE:
2783 CODE:
2784 SvSTATE_current->cctx->idle_sp = 0;
2785
2786void
2787swap_defsv (Coro::State self)
985 PROTOTYPE: @ 2788 PROTOTYPE: $
2789 ALIAS:
2790 swap_defav = 1
986 CODE: 2791 CODE:
987 static SV *returnstk; 2792 if (!self->slot)
988 SV *sv; 2793 croak ("cannot swap state with coroutine that has no saved state,");
989 AV *defav = GvAV (PL_defgv); 2794 else
990 struct coro *prev, *next; 2795 {
2796 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2797 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
991 2798
992 if (!returnstk) 2799 SV *tmp = *src; *src = *dst; *dst = tmp;
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2800 }
994 2801
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 2802
1009MODULE = Coro::State PACKAGE = Coro 2803MODULE = Coro::State PACKAGE = Coro
1010 2804
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 2805BOOT:
1014{ 2806{
1015 int i; 2807 int i;
2808
2809 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2812
2813 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2814 SvREADONLY_on (coro_current);
2815
1016 HV *stash = gv_stashpv ("Coro", TRUE); 2816 coro_stash = gv_stashpv ("Coro", TRUE);
1017 2817
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2818 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2819 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2820 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2821 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2822 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2823 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 2824
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2825 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 2826 coro_ready[i] = newAV ();
1030 2827
1031 { 2828 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 2829 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1033 2830
1034 coroapi.schedule = api_schedule; 2831 coroapi.schedule = api_schedule;
2832 coroapi.cede = api_cede;
2833 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 2834 coroapi.ready = api_ready;
2835 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 2836 coroapi.nready = coro_nready;
1037 coroapi.current = coro_current; 2837 coroapi.current = coro_current;
1038 2838
1039 GCoroAPI = &coroapi; 2839 /*GCoroAPI = &coroapi;*/
1040 sv_setiv(sv, (IV)&coroapi); 2840 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 2841 SvREADONLY_on (sv);
1042 } 2842 }
1043} 2843}
1044 2844
1045void 2845void
1046ready(self) 2846schedule (...)
1047 SV * self 2847 CODE:
2848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2849
2850void
2851cede (...)
2852 CODE:
2853 CORO_EXECUTE_SLF_XS (slf_init_cede);
2854
2855void
2856cede_notself (...)
2857 CODE:
2858 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2859
2860void
2861_set_current (SV *current)
1048 PROTOTYPE: $ 2862 PROTOTYPE: $
1049 CODE: 2863 CODE:
1050 api_ready (self); 2864 SvREFCNT_dec (SvRV (coro_current));
2865 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2866
2867void
2868_set_readyhook (SV *hook)
2869 PROTOTYPE: $
2870 CODE:
2871 SvREFCNT_dec (coro_readyhook);
2872 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1051 2873
1052int 2874int
2875prio (Coro::State coro, int newprio = 0)
2876 PROTOTYPE: $;$
2877 ALIAS:
2878 nice = 1
2879 CODE:
2880{
2881 RETVAL = coro->prio;
2882
2883 if (items > 1)
2884 {
2885 if (ix)
2886 newprio = coro->prio - newprio;
2887
2888 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2889 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2890
2891 coro->prio = newprio;
2892 }
2893}
2894 OUTPUT:
2895 RETVAL
2896
2897SV *
2898ready (SV *self)
2899 PROTOTYPE: $
2900 CODE:
2901 RETVAL = boolSV (api_ready (aTHX_ self));
2902 OUTPUT:
2903 RETVAL
2904
2905int
1053nready(...) 2906nready (...)
1054 PROTOTYPE: 2907 PROTOTYPE:
1055 CODE: 2908 CODE:
1056 RETVAL = coro_nready; 2909 RETVAL = coro_nready;
1057 OUTPUT: 2910 OUTPUT:
1058 RETVAL 2911 RETVAL
1059 2912
2913# for async_pool speedup
1060void 2914void
1061schedule(...) 2915_pool_1 (SV *cb)
1062 PROTOTYPE:
1063 ALIAS:
1064 cede = 1
1065 CODE: 2916 CODE:
1066 api_schedule (ix); 2917{
2918 HV *hv = (HV *)SvRV (coro_current);
2919 struct coro *coro = SvSTATE_hv ((SV *)hv);
2920 AV *defav = GvAV (PL_defgv);
2921 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2922 AV *invoke_av;
2923 int i, len;
1067 2924
2925 if (!invoke)
2926 {
2927 SV *old = PL_diehook;
2928 PL_diehook = 0;
2929 SvREFCNT_dec (old);
2930 croak ("\3async_pool terminate\2\n");
2931 }
2932
2933 SvREFCNT_dec (coro->saved_deffh);
2934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2935
2936 hv_store (hv, "desc", sizeof ("desc") - 1,
2937 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2938
2939 invoke_av = (AV *)SvRV (invoke);
2940 len = av_len (invoke_av);
2941
2942 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2943
2944 if (len > 0)
2945 {
2946 av_fill (defav, len - 1);
2947 for (i = 0; i < len; ++i)
2948 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2949 }
2950}
2951
2952void
2953_pool_2 (SV *cb)
2954 CODE:
2955{
2956 HV *hv = (HV *)SvRV (coro_current);
2957 struct coro *coro = SvSTATE_hv ((SV *)hv);
2958
2959 sv_setsv (cb, &PL_sv_undef);
2960
2961 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2962 coro->saved_deffh = 0;
2963
2964 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2965 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2966 {
2967 SV *old = PL_diehook;
2968 PL_diehook = 0;
2969 SvREFCNT_dec (old);
2970 croak ("\3async_pool terminate\2\n");
2971 }
2972
2973 av_clear (GvAV (PL_defgv));
2974 hv_store (hv, "desc", sizeof ("desc") - 1,
2975 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2976
2977 coro->prio = 0;
2978
2979 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2980 api_trace (aTHX_ coro_current, 0);
2981
2982 av_push (av_async_pool, newSVsv (coro_current));
2983}
2984
2985SV *
2986rouse_cb ()
2987 PROTOTYPE:
2988 CODE:
2989 RETVAL = coro_new_rouse_cb (aTHX);
2990 OUTPUT:
2991 RETVAL
2992
2993void
2994rouse_wait (SV *cb = 0)
2995 PROTOTYPE: ;$
2996 PPCODE:
2997 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2998
2999
3000MODULE = Coro::State PACKAGE = PerlIO::cede
3001
3002BOOT:
3003 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3004
3005
3006MODULE = Coro::State PACKAGE = Coro::Semaphore
3007
3008SV *
3009new (SV *klass, SV *count = 0)
3010 CODE:
3011 RETVAL = sv_bless (
3012 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3013 GvSTASH (CvGV (cv))
3014 );
3015 OUTPUT:
3016 RETVAL
3017
3018# helper for Coro::Channel
3019SV *
3020_alloc (int count)
3021 CODE:
3022 RETVAL = coro_waitarray_new (aTHX_ count);
3023 OUTPUT:
3024 RETVAL
3025
3026SV *
3027count (SV *self)
3028 CODE:
3029 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3030 OUTPUT:
3031 RETVAL
3032
3033void
3034up (SV *self, int adjust = 1)
3035 ALIAS:
3036 adjust = 1
3037 CODE:
3038 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3039
3040void
3041down (SV *self)
3042 CODE:
3043 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3044
3045void
3046wait (SV *self)
3047 CODE:
3048 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3049
3050void
3051try (SV *self)
3052 PPCODE:
3053{
3054 AV *av = (AV *)SvRV (self);
3055 SV *count_sv = AvARRAY (av)[0];
3056 IV count = SvIVX (count_sv);
3057
3058 if (count > 0)
3059 {
3060 --count;
3061 SvIVX (count_sv) = count;
3062 XSRETURN_YES;
3063 }
3064 else
3065 XSRETURN_NO;
3066}
3067
3068void
3069waiters (SV *self)
3070 PPCODE:
3071{
3072 AV *av = (AV *)SvRV (self);
3073 int wcount = AvFILLp (av) + 1 - 1;
3074
3075 if (GIMME_V == G_SCALAR)
3076 XPUSHs (sv_2mortal (newSViv (wcount)));
3077 else
3078 {
3079 int i;
3080 EXTEND (SP, wcount);
3081 for (i = 1; i <= wcount; ++i)
3082 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3083 }
3084}
3085
3086MODULE = Coro::State PACKAGE = Coro::Signal
3087
3088SV *
3089new (SV *klass)
3090 CODE:
3091 RETVAL = sv_bless (
3092 coro_waitarray_new (aTHX_ 0),
3093 GvSTASH (CvGV (cv))
3094 );
3095 OUTPUT:
3096 RETVAL
3097
3098void
3099wait (SV *self)
3100 CODE:
3101 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3102
3103void
3104broadcast (SV *self)
3105 CODE:
3106{
3107 AV *av = (AV *)SvRV (self);
3108 coro_signal_wake (aTHX_ av, AvFILLp (av));
3109}
3110
3111void
3112send (SV *self)
3113 CODE:
3114{
3115 AV *av = (AV *)SvRV (self);
3116
3117 if (AvFILLp (av))
3118 coro_signal_wake (aTHX_ av, 1);
3119 else
3120 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3121}
3122
3123IV
3124awaited (SV *self)
3125 CODE:
3126 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3127 OUTPUT:
3128 RETVAL
3129
3130
3131MODULE = Coro::State PACKAGE = Coro::AnyEvent
3132
3133BOOT:
3134 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3135
3136void
3137_schedule (...)
3138 CODE:
3139{
3140 static int incede;
3141
3142 api_cede_notself (aTHX);
3143
3144 ++incede;
3145 while (coro_nready >= incede && api_cede (aTHX))
3146 ;
3147
3148 sv_setsv (sv_activity, &PL_sv_undef);
3149 if (coro_nready >= incede)
3150 {
3151 PUSHMARK (SP);
3152 PUTBACK;
3153 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3154 }
3155
3156 --incede;
3157}
3158
3159
3160MODULE = Coro::State PACKAGE = Coro::AIO
3161
3162void
3163_register (char *target, char *proto, SV *req)
3164 CODE:
3165{
3166 HV *st;
3167 GV *gvp;
3168 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3169 /* newXSproto doesn't return the CV on 5.8 */
3170 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3171 sv_setpv ((SV *)slf_cv, proto);
3172 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3173}
3174

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