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Comparing Coro/Coro/State.xs (file contents):
Revision 1.28 by root, Sat Aug 25 21:32:05 2001 UTC vs.
Revision 1.272 by root, Fri Nov 14 20:35:49 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, don't ask
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_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef 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
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
29#define dSTACKLEVEL void *stacklevel = &stacklevel 124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
30 126
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
32 143
33#include "CoroAPI.h" 144#include "CoroAPI.h"
34 145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
36 187
37/* this is actually not only the c stack but also c registers etc... */ 188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
214/* this is a structure representing a c-level coroutine */
38typedef struct { 215typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 216{
40 int usecnt; /* shared by how many coroutines */ 217 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 218
219 /* the stack */
220 void *sptr;
221 size_t ssize;
222
223 /* cpu state */
224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
226 JMPENV *top_env;
43 coro_context cctx; 227 coro_context cctx;
44 228
45 void *sptr; 229 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 230#if CORO_USE_VALGRIND
47} coro_stack; 231 int valgrind_id;
232#endif
233 unsigned char flags;
234} coro_cctx;
48 235
236enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
242
243/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct
245{
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is the per-perl-coro slf frame info */
258/* it is treated like other "global" interpreter data */
259/* and unfortunately is copied around, so kepe it small */
260struct slf_frame
261{
262 void (*prepare) (struct coro_transfer_args *ta); /* 0 means not yet initialised */
263 int (*check) (pTHX);
264};
265
266/* this is a structure representing a perl-level coroutine */
49struct coro { 267struct coro {
50 /* the optional C context */ 268 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 269 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 270
55 /* optionally saved, might be zero */ 271 /* process data */
56 AV *defav; 272 struct slf_frame slf_frame; /* saved slf frame */
57 SV *defsv; 273 void *slf_data;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack; 274 AV *mainstack;
68 SV **stack_sp; 275 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 276
92 /* data associated with this coroutine (initial args) */ 277 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 278 int refcnt; /* coroutines are refcounted, yes */
279 int flags; /* CF_ flags */
280 HV *hv; /* the perl hash associated with this coro, if any */
281
282 /* statistics */
283 int usecount; /* number of transfers to this coro */
284
285 /* coro process data */
286 int prio;
287 SV *throw; /* exception to be thrown */
288
289 /* async_pool */
290 SV *saved_deffh;
291
292 /* linked list */
293 struct coro *next, *prev;
94}; 294};
95 295
96typedef struct coro *Coro__State; 296typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 297typedef struct coro *Coro__State_or_hashref;
98 298
99static AV *main_mainstack; /* used to differentiate between $main and others */ 299static struct slf_frame slf_frame; /* the current slf frame */
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 c->dowarn = PL_dowarn;
414 c->in_eval = PL_in_eval;
415
416 c->curstackinfo = PL_curstackinfo;
417 c->curstack = PL_curstack;
418 c->mainstack = PL_mainstack;
419 c->stack_sp = PL_stack_sp;
420 c->op = PL_op;
421 c->curpad = PL_curpad;
422 c->stack_base = PL_stack_base;
423 c->stack_max = PL_stack_max;
424 c->tmps_stack = PL_tmps_stack;
425 c->tmps_floor = PL_tmps_floor;
426 c->tmps_ix = PL_tmps_ix;
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437 c->retstack = PL_retstack;
438 c->retstack_ix = PL_retstack_ix;
439 c->retstack_max = PL_retstack_max;
440 c->curcop = PL_curcop;
441 c->top_env = PL_top_env;
442}
443
444/*
445 * allocate various perl stacks. This is an exact copy
446 * of perl.c:init_stacks, except that it uses less memory
447 * on the assumption that coroutines do not usually need
448 * a lot of stackspace.
449 */
450STATIC void
451coro_init_stacks (pTHX)
452{
453 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
454 PL_curstackinfo->si_type = PERLSI_MAIN;
455 PL_curstack = PL_curstackinfo->si_stack;
456 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
457
458 PL_stack_base = AvARRAY(PL_curstack);
459 PL_stack_sp = PL_stack_base;
460 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
461
462 New(50,PL_tmps_stack,96,SV*);
463 PL_tmps_floor = -1;
464 PL_tmps_ix = -1;
465 PL_tmps_max = 96;
466
467 New(54,PL_markstack,16,I32);
468 PL_markstack_ptr = PL_markstack;
469 PL_markstack_max = PL_markstack + 16;
470
471 SET_MARK_OFFSET;
472
473 New(54,PL_scopestack,16,I32);
474 PL_scopestack_ix = 0;
475 PL_scopestack_max = 16;
476
477 New(54,PL_savestack,96,ANY);
478 PL_savestack_ix = 0;
479 PL_savestack_max = 96;
480
481 New(54,PL_retstack,8,OP*);
482 PL_retstack_ix = 0;
483 PL_retstack_max = 8;
484}
485
486/*
487 * destroy the stacks, the callchain etc...
488 * still there is a memleak of 128 bytes...
489 */
490STATIC void
491destroy_stacks(pTHX)
492{
493 /* is this ugly, I ask? */
494 while (PL_scopestack_ix)
495 LEAVE;
496
497 /* sure it is, but more important: is it correct?? :/ */
498 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499 FREETMPS;
500
501 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next;
503
504 while (PL_curstackinfo)
505 {
506 PERL_SI *p = PL_curstackinfo->si_prev;
507
508 {
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
515 dounwind(-1);
516
517 SvREFCNT_dec(PL_curstackinfo->si_stack);
518 Safefree(PL_curstackinfo->si_cxstack);
519 Safefree(PL_curstackinfo);
520 PL_curstackinfo = p;
521 }
522
523 Safefree(PL_tmps_stack);
524 Safefree(PL_markstack);
525 Safefree(PL_scopestack);
526 Safefree(PL_savestack);
527 Safefree(PL_retstack);
528}
529
530static void
531allocate_stack (Coro__State ctx, int alloc)
532{
533 coro_stack *stack;
534
535 New (0, stack, 1, coro_stack);
536
537 stack->refcnt = 1;
538 stack->usecnt = 1;
539 stack->gencnt = ctx->gencnt = 0;
540 if (alloc)
541 {
542#ifdef HAVE_MMAP
543 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
545 if (stack->sptr == (void *)-1)
546#endif
547 {
548 /*FIXME*//*D*//* reasonable stack size! */
549 stack->ssize = -4096 * sizeof (long);
550 New (0, stack->sptr, 4096, long);
551 }
552 }
553 else
554 stack->sptr = 0;
555
556 ctx->stack = stack;
557}
558
559static void
560deallocate_stack (Coro__State ctx)
561{
562 coro_stack *stack = ctx->stack;
563
564 ctx->stack = 0;
565
566 if (stack)
567 {
568 printf ("deallocating stack %p %d\n", stack, stack->refcnt);/*D*/
569 if (!--stack->refcnt)
570 {
571#ifdef HAVE_MMAP
572 if (stack->ssize > 0 && stack->sptr)
573 munmap (stack->sptr, stack->ssize);
574 else
575#else
576 Safefree (stack->sptr);
577#endif
578 Safefree (stack);
579 }
580 else if (ctx->gencnt == stack->gencnt)
581 --stack->usecnt;
582 }
583}
584
585static void
586setup_coro (void *arg)
587{
588 /*
589 * emulate part of the perl startup here.
590 */
591 dSP;
592 Coro__State ctx = (Coro__State)arg;
593 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
594
595 coro_init_stacks (aTHX);
596 /*PL_curcop = 0;*/
597 /*PL_in_eval = PL_in_eval;*/ /* inherit */
598 SvREFCNT_dec (GvAV (PL_defgv));
599 GvAV (PL_defgv) = ctx->args;
600
601 SPAGAIN;
602
603 if (ctx->stack)
604 {
605 ctx->cursp = 0;
606
607 PUSHMARK(SP);
608 PUTBACK;
609 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
610
611 if (SvTRUE (ERRSV))
612 croak (NULL);
613 else
614 croak ("FATAL: CCTXT coroutine returned!");
615 }
616 else
617 {
618 UNOP myop;
619
620 PL_op = (OP *)&myop;
621
622 Zero(&myop, 1, UNOP);
623 myop.op_next = Nullop;
624 myop.op_flags = OPf_WANT_VOID;
625
626 PUSHMARK(SP);
627 XPUSHs (sub_init);
628 /*
629 * the next line is slightly wrong, as PL_op->op_next
630 * is actually being executed so we skip the first op.
631 * that doesn't matter, though, since it is only
632 * pp_nextstate and we never return...
633 * ah yes, and I don't care anyways ;)
634 */
635 PUTBACK;
636 PL_op = pp_entersub();
637 SPAGAIN;
638
639 ENTER; /* necessary e.g. for dounwind */
640 }
641}
642
643static void
644continue_coro (void *arg)
645{
646 /*
647 * this is a _very_ stripped down perl interpreter ;)
648 */
649 Coro__State ctx = (Coro__State)arg;
650
651 /*FIXME*//* must set up top_env here */
652 ctx->cursp = 0;
653 PL_op = PL_op->op_next;
654 CALLRUNOPS(aTHX);
655
656 abort ();
657}
658
659STATIC void
660transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
661{
662 dSTACKLEVEL;
663 static struct coro *xnext;
664
665 printf ("%p => %p\n", prev, next);/*D*/
666 if (prev != next)
667 {
668 xnext = next;
669
670 if (next->mainstack)
671 {
672 SAVE (prev, flags);
673 LOAD (next);
674
675 /* mark this state as in-use */
676 next->mainstack = 0;
677 next->tmps_ix = -2;
678
679 /* stacklevel changed? if yes, grab the stack for us! */
680 if (flags & TRANSFER_SAVE_CCTXT)
681 {
682 if (!prev->stack)
683 allocate_stack (prev, 0);
684 else if (prev->cursp != stacklevel
685 && prev->stack->usecnt > 1)
686 {
687 prev->gencnt = ++prev->stack->gencnt;
688 prev->stack->usecnt = 1;
689 }
690
691 /* has our stack been invalidated? */
692 if (next->stack && next->stack->gencnt != next->gencnt)
693 {
694 deallocate_stack (next);
695 allocate_stack (next, 1);
696 coro_create (&(next->stack->cctx),
697 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize));
699 }
700
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
702 /* don't add any code here */
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 /* don't add any code here */
734 }
735 }
736 else
737 setup_coro (next);
738 }
739 }
740
741 xnext->cursp = stacklevel;
742}
743
744static struct coro *
745sv_to_coro (SV *arg, const char *funcname, const char *varname)
746{
747 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
748 {
749 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
750
751 if (!he)
752 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
753
754 arg = HeVAL(he);
755 }
756
757 /* must also be changed inside Coro::Cont::yield */
758 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
759 return (struct coro *) SvIV((SV*)SvRV(arg));
760
761 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
762 /*NORETURN*/
763}
764
765static void
766api_transfer(pTHX_ SV *prev, SV *next, int flags)
767{
768 transfer(aTHX_
769 sv_to_coro (prev, "Coro::transfer", "prev"),
770 sv_to_coro (next, "Coro::transfer", "next"),
771 flags);
772}
773 300
774/** Coro ********************************************************************/ 301/** Coro ********************************************************************/
775 302
776#define PRIO_MAX 3 303#define PRIO_MAX 3
777#define PRIO_HIGH 1 304#define PRIO_HIGH 1
… …
779#define PRIO_LOW -1 306#define PRIO_LOW -1
780#define PRIO_IDLE -3 307#define PRIO_IDLE -3
781#define PRIO_MIN -4 308#define PRIO_MIN -4
782 309
783/* for Coro.pm */ 310/* for Coro.pm */
784static GV *coro_current, *coro_idle; 311static SV *coro_current;
312static SV *coro_readyhook;
785static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 313static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
786static int coro_nready; 314static struct coro *coro_first;
315#define coro_nready coroapi.nready
316
317/** lowlevel stuff **********************************************************/
318
319static SV *
320coro_get_sv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_sv (name, create);
325#endif
326 return get_sv (name, create);
327}
328
329static AV *
330coro_get_av (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_av (name, create);
335#endif
336 return get_av (name, create);
337}
338
339static HV *
340coro_get_hv (pTHX_ const char *name, int create)
341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_hv (name, create);
345#endif
346 return get_hv (name, create);
347}
348
349static AV *
350coro_clone_padlist (pTHX_ CV *cv)
351{
352 AV *padlist = CvPADLIST (cv);
353 AV *newpadlist, *newpad;
354
355 newpadlist = newAV ();
356 AvREAL_off (newpadlist);
357#if PERL_VERSION_ATLEAST (5,10,0)
358 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
359#else
360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
361#endif
362 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
363 --AvFILLp (padlist);
364
365 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
366 av_store (newpadlist, 1, (SV *)newpad);
367
368 return newpadlist;
369}
787 370
788static void 371static void
789coro_enq (SV *sv) 372free_padlist (pTHX_ AV *padlist)
790{ 373{
791 if (SvROK (sv)) 374 /* may be during global destruction */
375 if (SvREFCNT (padlist))
792 { 376 {
793 SV *hv = SvRV (sv); 377 I32 i = AvFILLp (padlist);
794 if (SvTYPE (hv) == SVt_PVHV) 378 while (i >= 0)
795 { 379 {
796 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 380 SV **svp = av_fetch (padlist, i--, FALSE);
797 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 381 if (svp)
382 {
383 SV *sv;
384 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
385 SvREFCNT_dec (sv);
798 386
799 prio = prio > PRIO_MAX ? PRIO_MAX 387 SvREFCNT_dec (*svp);
800 : prio < PRIO_MIN ? PRIO_MIN 388 }
801 : prio;
802
803 av_push (coro_ready [prio - PRIO_MIN], sv);
804 coro_nready++;
805
806 return;
807 } 389 }
390
391 SvREFCNT_dec ((SV*)padlist);
392 }
393}
394
395static int
396coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
397{
398 AV *padlist;
399 AV *av = (AV *)mg->mg_obj;
400
401 /* casting is fun. */
402 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
403 free_padlist (aTHX_ padlist);
404
405 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
406
407 return 0;
408}
409
410#define CORO_MAGIC_type_cv PERL_MAGIC_ext
411#define CORO_MAGIC_type_state PERL_MAGIC_ext
412
413static MGVTBL coro_cv_vtbl = {
414 0, 0, 0, 0,
415 coro_cv_free
416};
417
418#define CORO_MAGIC(sv, type) \
419 SvMAGIC (sv) \
420 ? SvMAGIC (sv)->mg_type == type \
421 ? SvMAGIC (sv) \
422 : mg_find (sv, type) \
423 : 0
424
425#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
426#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
427
428INLINE struct coro *
429SvSTATE_ (pTHX_ SV *coro)
430{
431 HV *stash;
432 MAGIC *mg;
433
434 if (SvROK (coro))
435 coro = SvRV (coro);
436
437 if (expect_false (SvTYPE (coro) != SVt_PVHV))
438 croak ("Coro::State object required");
439
440 stash = SvSTASH (coro);
441 if (expect_false (stash != coro_stash && stash != coro_state_stash))
442 {
443 /* very slow, but rare, check */
444 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
445 croak ("Coro::State object required");
446 }
447
448 mg = CORO_MAGIC_state (coro);
449 return (struct coro *)mg->mg_ptr;
450}
451
452#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
453
454/* the next two functions merely cache the padlists */
455static void
456get_padlist (pTHX_ CV *cv)
457{
458 MAGIC *mg = CORO_MAGIC_cv (cv);
459 AV *av;
460
461 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
462 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
463 else
464 {
465#if CORO_PREFER_PERL_FUNCTIONS
466 /* this is probably cleaner? but also slower! */
467 /* in practise, it seems to be less stable */
468 CV *cp = Perl_cv_clone (cv);
469 CvPADLIST (cv) = CvPADLIST (cp);
470 CvPADLIST (cp) = 0;
471 SvREFCNT_dec (cp);
472#else
473 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
474#endif
808 } 475 }
476}
809 477
810 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 478static void
479put_padlist (pTHX_ CV *cv)
480{
481 MAGIC *mg = CORO_MAGIC_cv (cv);
482 AV *av;
483
484 if (expect_false (!mg))
485 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
486
487 av = (AV *)mg->mg_obj;
488
489 if (expect_false (AvFILLp (av) >= AvMAX (av)))
490 av_extend (av, AvMAX (av) + 1);
491
492 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
493}
494
495/** load & save, init *******************************************************/
496
497static void
498load_perl (pTHX_ Coro__State c)
499{
500 perl_slots *slot = c->slot;
501 c->slot = 0;
502
503 PL_mainstack = c->mainstack;
504
505 GvSV (PL_defgv) = slot->defsv;
506 GvAV (PL_defgv) = slot->defav;
507 GvSV (PL_errgv) = slot->errsv;
508 GvSV (irsgv) = slot->irsgv;
509
510 #define VAR(name,type) PL_ ## name = slot->name;
511 # include "state.h"
512 #undef VAR
513
514 {
515 dSP;
516
517 CV *cv;
518
519 /* now do the ugly restore mess */
520 while (expect_true (cv = (CV *)POPs))
521 {
522 put_padlist (aTHX_ cv); /* mark this padlist as available */
523 CvDEPTH (cv) = PTR2IV (POPs);
524 CvPADLIST (cv) = (AV *)POPs;
525 }
526
527 PUTBACK;
528 }
529
530 slf_frame = c->slf_frame;
531 coroapi.slf_data = c->slf_data;
532}
533
534static void
535save_perl (pTHX_ Coro__State c)
536{
537 c->slf_data = coroapi.slf_data;
538 c->slf_frame = slf_frame;
539
540 {
541 dSP;
542 I32 cxix = cxstack_ix;
543 PERL_CONTEXT *ccstk = cxstack;
544 PERL_SI *top_si = PL_curstackinfo;
545
546 /*
547 * the worst thing you can imagine happens first - we have to save
548 * (and reinitialize) all cv's in the whole callchain :(
549 */
550
551 XPUSHs (Nullsv);
552 /* this loop was inspired by pp_caller */
553 for (;;)
554 {
555 while (expect_true (cxix >= 0))
556 {
557 PERL_CONTEXT *cx = &ccstk[cxix--];
558
559 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
560 {
561 CV *cv = cx->blk_sub.cv;
562
563 if (expect_true (CvDEPTH (cv)))
564 {
565 EXTEND (SP, 3);
566 PUSHs ((SV *)CvPADLIST (cv));
567 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
568 PUSHs ((SV *)cv);
569
570 CvDEPTH (cv) = 0;
571 get_padlist (aTHX_ cv);
572 }
573 }
574 }
575
576 if (expect_true (top_si->si_type == PERLSI_MAIN))
577 break;
578
579 top_si = top_si->si_prev;
580 ccstk = top_si->si_cxstack;
581 cxix = top_si->si_cxix;
582 }
583
584 PUTBACK;
585 }
586
587 /* allocate some space on the context stack for our purposes */
588 /* we manually unroll here, as usually 2 slots is enough */
589 if (SLOT_COUNT >= 1) CXINC;
590 if (SLOT_COUNT >= 2) CXINC;
591 if (SLOT_COUNT >= 3) CXINC;
592 {
593 int i;
594 for (i = 3; i < SLOT_COUNT; ++i)
595 CXINC;
596 }
597 cxstack_ix -= SLOT_COUNT; /* undo allocation */
598
599 c->mainstack = PL_mainstack;
600
601 {
602 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
603
604 slot->defav = GvAV (PL_defgv);
605 slot->defsv = DEFSV;
606 slot->errsv = ERRSV;
607 slot->irsgv = GvSV (irsgv);
608
609 #define VAR(name,type) slot->name = PL_ ## name;
610 # include "state.h"
611 #undef VAR
612 }
613}
614
615/*
616 * allocate various perl stacks. This is almost an exact copy
617 * of perl.c:init_stacks, except that it uses less memory
618 * on the (sometimes correct) assumption that coroutines do
619 * not usually need a lot of stackspace.
620 */
621#if CORO_PREFER_PERL_FUNCTIONS
622# define coro_init_stacks init_stacks
623#else
624static void
625coro_init_stacks (pTHX)
626{
627 PL_curstackinfo = new_stackinfo(32, 8);
628 PL_curstackinfo->si_type = PERLSI_MAIN;
629 PL_curstack = PL_curstackinfo->si_stack;
630 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
631
632 PL_stack_base = AvARRAY(PL_curstack);
633 PL_stack_sp = PL_stack_base;
634 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
635
636 New(50,PL_tmps_stack,32,SV*);
637 PL_tmps_floor = -1;
638 PL_tmps_ix = -1;
639 PL_tmps_max = 32;
640
641 New(54,PL_markstack,16,I32);
642 PL_markstack_ptr = PL_markstack;
643 PL_markstack_max = PL_markstack + 16;
644
645#ifdef SET_MARK_OFFSET
646 SET_MARK_OFFSET;
647#endif
648
649 New(54,PL_scopestack,8,I32);
650 PL_scopestack_ix = 0;
651 PL_scopestack_max = 8;
652
653 New(54,PL_savestack,24,ANY);
654 PL_savestack_ix = 0;
655 PL_savestack_max = 24;
656
657#if !PERL_VERSION_ATLEAST (5,10,0)
658 New(54,PL_retstack,4,OP*);
659 PL_retstack_ix = 0;
660 PL_retstack_max = 4;
661#endif
662}
663#endif
664
665/*
666 * destroy the stacks, the callchain etc...
667 */
668static void
669coro_destruct_stacks (pTHX)
670{
671 while (PL_curstackinfo->si_next)
672 PL_curstackinfo = PL_curstackinfo->si_next;
673
674 while (PL_curstackinfo)
675 {
676 PERL_SI *p = PL_curstackinfo->si_prev;
677
678 if (!IN_DESTRUCT)
679 SvREFCNT_dec (PL_curstackinfo->si_stack);
680
681 Safefree (PL_curstackinfo->si_cxstack);
682 Safefree (PL_curstackinfo);
683 PL_curstackinfo = p;
684 }
685
686 Safefree (PL_tmps_stack);
687 Safefree (PL_markstack);
688 Safefree (PL_scopestack);
689 Safefree (PL_savestack);
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 Safefree (PL_retstack);
692#endif
693}
694
695static size_t
696coro_rss (pTHX_ struct coro *coro)
697{
698 size_t rss = sizeof (*coro);
699
700 if (coro->mainstack)
701 {
702 perl_slots tmp_slot;
703 perl_slots *slot;
704
705 if (coro->flags & CF_RUNNING)
706 {
707 slot = &tmp_slot;
708
709 #define VAR(name,type) slot->name = PL_ ## name;
710 # include "state.h"
711 #undef VAR
712 }
713 else
714 slot = coro->slot;
715
716 if (slot)
717 {
718 rss += sizeof (slot->curstackinfo);
719 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
720 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
721 rss += slot->tmps_max * sizeof (SV *);
722 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
723 rss += slot->scopestack_max * sizeof (I32);
724 rss += slot->savestack_max * sizeof (ANY);
725
726#if !PERL_VERSION_ATLEAST (5,10,0)
727 rss += slot->retstack_max * sizeof (OP *);
728#endif
729 }
730 }
731
732 return rss;
733}
734
735/** coroutine stack handling ************************************************/
736
737static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
739static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
740
741/* apparently < 5.8.8 */
742#ifndef MgPV_nolen_const
743#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
744 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
745 (const char*)(mg)->mg_ptr)
746#endif
747
748/*
749 * This overrides the default magic get method of %SIG elements.
750 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
751 * and instead of tryign to save and restore the hash elements, we just provide
752 * readback here.
753 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
754 * not expecting this to actually change the hook. This is a potential problem
755 * when a schedule happens then, but we ignore this.
756 */
757static int
758coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
759{
760 const char *s = MgPV_nolen_const (mg);
761
762 if (*s == '_')
763 {
764 SV **svp = 0;
765
766 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
767 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
768
769 if (svp)
770 {
771 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
777}
778
779static int
780coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
781{
782 const char *s = MgPV_nolen_const (mg);
783
784 if (*s == '_')
785 {
786 SV **svp = 0;
787
788 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
789 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
790
791 if (svp)
792 {
793 SV *old = *svp;
794 *svp = 0;
795 SvREFCNT_dec (old);
796 return 0;
797 }
798 }
799
800 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
801}
802
803static int
804coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
805{
806 const char *s = MgPV_nolen_const (mg);
807
808 if (*s == '_')
809 {
810 SV **svp = 0;
811
812 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
813 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
814
815 if (svp)
816 {
817 SV *old = *svp;
818 *svp = newSVsv (sv);
819 SvREFCNT_dec (old);
820 return 0;
821 }
822 }
823
824 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825}
826
827static void
828prepare_nop (aTHX_ struct coro_transfer_args *ta)
829{
830 /* kind of mega-hacky, but works */
831 ta->next = ta->prev = (struct coro *)ta;
832}
833
834static int
835slf_check_nop (aTHX)
836{
837 return 0;
838}
839
840static void
841coro_setup (pTHX_ struct coro *coro)
842{
843 /*
844 * emulate part of the perl startup here.
845 */
846 coro_init_stacks (aTHX);
847
848 PL_runops = RUNOPS_DEFAULT;
849 PL_curcop = &PL_compiling;
850 PL_in_eval = EVAL_NULL;
851 PL_comppad = 0;
852 PL_curpm = 0;
853 PL_curpad = 0;
854 PL_localizing = 0;
855 PL_dirty = 0;
856 PL_restartop = 0;
857#if PERL_VERSION_ATLEAST (5,10,0)
858 PL_parser = 0;
859#endif
860
861 /* recreate the die/warn hooks */
862 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
863 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
864
865 GvSV (PL_defgv) = newSV (0);
866 GvAV (PL_defgv) = coro->args; coro->args = 0;
867 GvSV (PL_errgv) = newSV (0);
868 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
869 PL_rs = newSVsv (GvSV (irsgv));
870 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
871
872 {
873 dSP;
874 UNOP myop;
875
876 Zero (&myop, 1, UNOP);
877 myop.op_next = Nullop;
878 myop.op_flags = OPf_WANT_VOID;
879
880 PUSHMARK (SP);
881 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
882 PUTBACK;
883 PL_op = (OP *)&myop;
884 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
885 SPAGAIN;
886 }
887
888 /* this newly created coroutine might be run on an existing cctx which most
889 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
890 */
891 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
892 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
893}
894
895static void
896coro_destruct (pTHX_ struct coro *coro)
897{
898 if (!IN_DESTRUCT)
899 {
900 /* restore all saved variables and stuff */
901 LEAVE_SCOPE (0);
902 assert (PL_tmps_floor == -1);
903
904 /* free all temporaries */
905 FREETMPS;
906 assert (PL_tmps_ix == -1);
907
908 /* unwind all extra stacks */
909 POPSTACK_TO (PL_mainstack);
910
911 /* unwind main stack */
912 dounwind (-1);
913 }
914
915 SvREFCNT_dec (GvSV (PL_defgv));
916 SvREFCNT_dec (GvAV (PL_defgv));
917 SvREFCNT_dec (GvSV (PL_errgv));
918 SvREFCNT_dec (PL_defoutgv);
919 SvREFCNT_dec (PL_rs);
920 SvREFCNT_dec (GvSV (irsgv));
921
922 SvREFCNT_dec (PL_diehook);
923 SvREFCNT_dec (PL_warnhook);
924
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->throw);
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 (coro_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 void
1066prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1067{
1068 ta->prev = (struct coro *)cctx;
1069 ta->next = 0;
1070}
1071
1072/* inject a fake call to Coro::State::_cctx_init into the execution */
1073/* _cctx_init should be careful, as it could be called at almost any time */
1074/* during execution of a perl program */
1075/* also initialises PL_top_env */
1076static void NOINLINE
1077cctx_prepare (pTHX_ coro_cctx *cctx)
1078{
1079 dSP;
1080 UNOP myop;
1081
1082 PL_top_env = &PL_start_env;
1083
1084 if (cctx->flags & CC_TRACE)
1085 PL_runops = runops_trace;
1086
1087 Zero (&myop, 1, UNOP);
1088 myop.op_next = PL_op;
1089 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1090
1091 PUSHMARK (SP);
1092 EXTEND (SP, 2);
1093 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1094 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1095 PUTBACK;
1096 PL_op = (OP *)&myop;
1097 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1098 SPAGAIN;
1099}
1100
1101/* the tail of transfer: execute stuff we can only do after a transfer */
1102INLINE void
1103transfer_tail (pTHX)
1104{
1105 struct coro *next = (struct coro *)transfer_next;
1106 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1107 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1108
1109 free_coro_mortal (aTHX);
1110 UNLOCK;
1111
1112 if (expect_false (next->throw))
1113 {
1114 SV *exception = sv_2mortal (next->throw);
1115
1116 next->throw = 0;
1117 sv_setsv (ERRSV, exception);
1118 croak (0);
1119 }
1120}
1121
1122/*
1123 * this is a _very_ stripped down perl interpreter ;)
1124 */
1125static void
1126cctx_run (void *arg)
1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
1134 dTHX;
1135
1136 /* normally we would need to skip the entersub here */
1137 /* not doing so will re-execute it, which is exactly what we want */
1138 /* PL_nop = PL_nop->op_next */
1139
1140 /* inject a fake subroutine call to cctx_init */
1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 /* TODO: throwing an exception here might be deadly, VERIFY */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150
1151 /*
1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1161}
1162
1163static coro_cctx *
1164cctx_new ()
1165{
1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
1198#if HAVE_MMAP
1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1200 /* mmap supposedly does allocate-on-write for us */
1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1202
1203 if (cctx->sptr != (void *)-1)
1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
1217
1218 if (!cctx->sptr)
1219 {
1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1221 _exit (EXIT_FAILURE);
1222 }
1223
1224 stack_start = cctx->sptr;
1225 stack_size = cctx->ssize;
1226 }
1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1233
1234 return cctx;
1235}
1236
1237static void
1238cctx_destroy (coro_cctx *cctx)
1239{
1240 if (!cctx)
1241 return;
1242
1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
1245
1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1251 #endif
1252
1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
1255 munmap (cctx->sptr, cctx->ssize);
1256 else
1257#endif
1258 Safefree (cctx->sptr);
1259 }
1260
1261 Safefree (cctx);
1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
1267static coro_cctx *
1268cctx_get (pTHX)
1269{
1270 while (expect_true (cctx_first))
1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
1274 --cctx_idle;
1275
1276 if (expect_true (!CCTX_EXPIRED (cctx)))
1277 return cctx;
1278
1279 cctx_destroy (cctx);
1280 }
1281
1282 return cctx_new_run ();
1283}
1284
1285static void
1286cctx_put (coro_cctx *cctx)
1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
1290 /* free another cctx if overlimit */
1291 if (expect_false (cctx_idle >= cctx_max_idle))
1292 {
1293 coro_cctx *first = cctx_first;
1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
1298 }
1299
1300 ++cctx_idle;
1301 cctx->next = cctx_first;
1302 cctx_first = cctx;
1303}
1304
1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
1329static void NOINLINE
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{
1332 dSTACKLEVEL;
1333
1334 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next))
1336 {
1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 }
1340 else if (expect_true (prev != next))
1341 {
1342 coro_cctx *prev__cctx;
1343
1344 if (expect_false (prev->flags & CF_NEW))
1345 {
1346 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING;
1350 }
1351
1352 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
1361 {
1362 /* need to start coroutine */
1363 next->flags &= ~CF_NEW;
1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
1366 }
1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
1378 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
1391 }
1392
1393 ++next->usecount;
1394
1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1406 }
1407
1408 transfer_tail (aTHX);
1409 }
1410}
1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
1431 UNLOCK;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435
1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1437 {
1438 struct coro temp;
1439
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->args);
1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
1461}
1462
1463static int
1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1465{
1466 struct coro *coro = (struct coro *)mg->mg_ptr;
1467 mg->mg_ptr = 0;
1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
1476
1477 return 0;
1478}
1479
1480static int
1481coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1482{
1483 struct coro *coro = (struct coro *)mg->mg_ptr;
1484
1485 ++coro->refcnt;
1486
1487 return 0;
1488}
1489
1490static MGVTBL coro_state_vtbl = {
1491 0, 0, 0, 0,
1492 coro_state_free,
1493 0,
1494#ifdef MGf_DUP
1495 coro_state_dup,
1496#else
1497# define MGf_DUP 0
1498#endif
1499};
1500
1501static void
1502prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{
1504 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
1507}
1508
1509static void
1510api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1511{
1512 struct coro_transfer_args ta;
1513
1514 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1515 TRANSFER (ta, 1);
1516}
1517
1518/** Coro ********************************************************************/
1519
1520static void
1521coro_enq (pTHX_ SV *coro_sv)
1522{
1523 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
811} 1524}
812 1525
813static SV * 1526static SV *
814coro_deq (int min_prio) 1527coro_deq (pTHX)
815{ 1528{
816 int prio = PRIO_MAX - PRIO_MIN; 1529 int prio;
817 1530
818 min_prio -= PRIO_MIN;
819 if (min_prio < 0)
820 min_prio = 0;
821
822 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1531 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
823 if (av_len (coro_ready[prio]) >= 0) 1532 if (AvFILLp (coro_ready [prio]) >= 0)
1533 return av_shift (coro_ready [prio]);
1534
1535 return 0;
1536}
1537
1538static int
1539api_ready (pTHX_ SV *coro_sv)
1540{
1541 struct coro *coro;
1542 SV *sv_hook;
1543 void (*xs_hook)(void);
1544
1545 if (SvROK (coro_sv))
1546 coro_sv = SvRV (coro_sv);
1547
1548 coro = SvSTATE (coro_sv);
1549
1550 if (coro->flags & CF_READY)
1551 return 0;
1552
1553 coro->flags |= CF_READY;
1554
1555 LOCK;
1556
1557 sv_hook = coro_nready ? 0 : coro_readyhook;
1558 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559
1560 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1561 ++coro_nready;
1562
1563 UNLOCK;
1564
1565 if (sv_hook)
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (sv_hook, G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 }
1580
1581 if (xs_hook)
1582 xs_hook ();
1583
1584 return 1;
1585}
1586
1587static int
1588api_is_ready (pTHX_ SV *coro_sv)
1589{
1590 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591}
1592
1593INLINE void
1594prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1595{
1596 SV *prev_sv, *next_sv;
1597
1598 for (;;)
1599 {
1600 LOCK;
1601 next_sv = coro_deq (aTHX);
1602
1603 /* nothing to schedule: call the idle handler */
1604 if (expect_false (!next_sv))
1605 {
1606 dSP;
1607 UNLOCK;
1608
1609 ENTER;
1610 SAVETMPS;
1611
1612 PUSHMARK (SP);
1613 PUTBACK;
1614 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1615 SPAGAIN;
1616
1617 FREETMPS;
1618 LEAVE;
1619 continue;
1620 }
1621
1622 ta->next = SvSTATE (next_sv);
1623
1624 /* cannot transfer to destroyed coros, skip and look for next */
1625 if (expect_false (ta->next->flags & CF_DESTROYED))
1626 {
1627 UNLOCK;
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 UNLOCK;
1635 break;
1636 }
1637
1638 /* free this only after the transfer */
1639 prev_sv = SvRV (coro_current);
1640 ta->prev = SvSTATE (prev_sv);
1641 TRANSFER_CHECK (*ta);
1642 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643 ta->next->flags &= ~CF_READY;
1644 SvRV_set (coro_current, next_sv);
1645
1646 LOCK;
1647 free_coro_mortal (aTHX);
1648 coro_mortal = prev_sv;
1649 UNLOCK;
1650}
1651
1652INLINE void
1653prepare_cede (pTHX_ struct coro_transfer_args *ta)
1654{
1655 api_ready (aTHX_ coro_current);
1656 prepare_schedule (aTHX_ ta);
1657}
1658
1659INLINE void
1660prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1661{
1662 SV *prev = SvRV (coro_current);
1663
1664 if (coro_nready)
1665 {
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (aTHX_ prev);
1668 }
1669 else
1670 prepare_nop (aTHX_ ta);
1671}
1672
1673static void
1674api_schedule (pTHX)
1675{
1676 struct coro_transfer_args ta;
1677
1678 prepare_schedule (aTHX_ &ta);
1679 TRANSFER (ta, 1);
1680}
1681
1682static int
1683api_cede (pTHX)
1684{
1685 struct coro_transfer_args ta;
1686
1687 prepare_cede (aTHX_ &ta);
1688
1689 if (expect_true (ta.prev != ta.next))
1690 {
1691 TRANSFER (ta, 1);
1692 return 1;
1693 }
1694 else
1695 return 0;
1696}
1697
1698static int
1699api_cede_notself (pTHX)
1700{
1701 if (coro_nready)
1702 {
1703 struct coro_transfer_args ta;
1704
1705 prepare_cede_notself (aTHX_ &ta);
1706 TRANSFER (ta, 1);
1707 return 1;
1708 }
1709 else
1710 return 0;
1711}
1712
1713static void
1714api_trace (pTHX_ SV *coro_sv, int flags)
1715{
1716 struct coro *coro = SvSTATE (coro_sv);
1717
1718 if (flags & CC_TRACE)
1719 {
1720 if (!coro->cctx)
1721 coro->cctx = cctx_new_run ();
1722 else if (!(coro->cctx->flags & CC_TRACE))
1723 croak ("cannot enable tracing on coroutine with custom stack");
1724
1725 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726 }
1727 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728 {
1729 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1730
1731 if (coro->flags & CF_RUNNING)
1732 PL_runops = RUNOPS_DEFAULT;
1733 else
1734 coro->slot->runops = RUNOPS_DEFAULT;
1735 }
1736}
1737
1738#if 0
1739static int
1740coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1741{
1742 AV *padlist;
1743 AV *av = (AV *)mg->mg_obj;
1744
1745 abort ();
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_gensub_vtbl = {
1751 0, 0, 0, 0,
1752 coro_gensub_free
1753};
1754#endif
1755
1756/*****************************************************************************/
1757/* PerlIO::cede */
1758
1759typedef struct
1760{
1761 PerlIOBuf base;
1762 NV next, every;
1763} PerlIOCede;
1764
1765static IV
1766PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1767{
1768 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1769
1770 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1771 self->next = nvtime () + self->every;
1772
1773 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1774}
1775
1776static SV *
1777PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1778{
1779 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1780
1781 return newSVnv (self->every);
1782}
1783
1784static IV
1785PerlIOCede_flush (pTHX_ PerlIO *f)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788 double now = nvtime ();
1789
1790 if (now >= self->next)
1791 {
1792 api_cede (aTHX);
1793 self->next = now + self->every;
1794 }
1795
1796 return PerlIOBuf_flush (aTHX_ f);
1797}
1798
1799static PerlIO_funcs PerlIO_cede =
1800{
1801 sizeof(PerlIO_funcs),
1802 "cede",
1803 sizeof(PerlIOCede),
1804 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1805 PerlIOCede_pushed,
1806 PerlIOBuf_popped,
1807 PerlIOBuf_open,
1808 PerlIOBase_binmode,
1809 PerlIOCede_getarg,
1810 PerlIOBase_fileno,
1811 PerlIOBuf_dup,
1812 PerlIOBuf_read,
1813 PerlIOBuf_unread,
1814 PerlIOBuf_write,
1815 PerlIOBuf_seek,
1816 PerlIOBuf_tell,
1817 PerlIOBuf_close,
1818 PerlIOCede_flush,
1819 PerlIOBuf_fill,
1820 PerlIOBase_eof,
1821 PerlIOBase_error,
1822 PerlIOBase_clearerr,
1823 PerlIOBase_setlinebuf,
1824 PerlIOBuf_get_base,
1825 PerlIOBuf_bufsiz,
1826 PerlIOBuf_get_ptr,
1827 PerlIOBuf_get_cnt,
1828 PerlIOBuf_set_ptrcnt,
1829};
1830
1831/*****************************************************************************/
1832
1833static const CV *slf_cv; /* for quick consistency check */
1834
1835static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836static SV *slf_arg0;
1837static SV *slf_arg1;
1838
1839/* this restores the stack in the case we patched the entersub, to */
1840/* recreate the stack frame as perl will on following calls */
1841/* since entersub cleared the stack */
1842static OP *
1843pp_restore (pTHX)
1844{
1845 dSP;
1846
1847 PUSHMARK (SP);
1848
1849 EXTEND (SP, 3);
1850 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1852 PUSHs ((SV *)CvGV (slf_cv));
1853
1854 RETURNOP (slf_restore.op_first);
1855}
1856
1857static void
1858slf_init_set_stacklevel (pTHX_ SV **arg, int items)
1859{
1860 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1861 CORO_SLF_DATA = (void *)SvIV (arg [0]);
1862}
1863
1864static void
1865slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1866{
1867 prepare_set_stacklevel (ta, (struct coro_cctx *)CORO_SLF_DATA);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1875
1876 CORO_SLF_DATA = (void *)arg; /* let's hope it will stay valid */
1877}
1878
1879static void
1880slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1881{
1882 SV **arg = (SV **)CORO_SLF_DATA;
1883
1884 prepare_transfer (ta, arg [0], arg [1]);
1885}
1886
1887static void
1888slf_init_nop (pTHX_ SV **arg, int items)
1889{
1890}
1891
1892/* slf_prepare_schedule == prepare_schedule */
1893/* slf_prepare_cede == prepare_cede */
1894/* slf_prepare_notself == prepare_notself */
1895
1896/* we hijack an hopefully unused CV flag for our purposes */
1897#define CVf_SLF 0x4000
1898
1899/*
1900 * these not obviously related functions are all rolled into one
1901 * function to increase chances that they all will call transfer with the same
1902 * stack offset
1903 * SLF stands for "schedule-like-function".
1904 */
1905static OP *
1906pp_slf (pTHX)
1907{
1908 I32 checkmark; /* mark SP to see how many elements check has pushed */
1909
1910 if (expect_true (!slf_frame.prepare))
1911 {
1912 /* first iteration */
1913 dSP;
1914 SV **arg = PL_stack_base + TOPMARK + 1;
1915 int items = SP - arg; /* args without function object */
1916 SV *gv = *sp;
1917 struct CoroSLF *slf;
1918
1919 /* do a quick consistency check on the "function" object, and if it isn't */
1920 /* for us, divert to the real entersub */
1921 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1922 return PL_ppaddr[OP_ENTERSUB](aTHX);
1923
1924 /* pop args */
1925 SP = PL_stack_base + POPMARK;
1926
1927 if (!(PL_op->op_flags & OPf_STACKED))
1928 {
1929 /* ampersand-form of call, use @_ instead of stack */
1930 AV *av = GvAV (PL_defgv);
1931 arg = AvARRAY (av);
1932 items = AvFILLp (av) + 1;
1933 }
1934
1935 PUTBACK;
1936
1937 slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
1938 slf_frame.prepare = slf->prepare;
1939 slf_frame.check = slf->check;
1940 slf->init (aTHX_ arg, items);
1941 }
1942
1943 /* now interpret the slf_frame */
1944 /* we use a callback system not to make the code needlessly */
1945 /* complicated, but so we can run multiple perl coros from one cctx */
1946
1947 do
1948 {
1949 struct coro_transfer_args ta;
1950
1951 slf_frame.prepare (aTHX_ &ta);
1952 TRANSFER (ta, 0);
1953
1954 checkmark = PL_stack_sp - PL_stack_base;
1955 }
1956 while (slf_frame.check (aTHX));
1957
1958 {
1959 dSP;
1960 SV **bot = PL_stack_base + checkmark;
1961 int gimme = GIMME_V;
1962
1963 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1964
1965 /* make sure we put something on the stack in scalar context */
1966 if (gimme == G_SCALAR)
824 { 1967 {
825 coro_nready--; 1968 if (sp == bot)
826 return av_shift (coro_ready[prio]); 1969 XPUSHs (&PL_sv_undef);
1970
1971 SP = bot + 1;
827 } 1972 }
828 1973
829 return 0; 1974 PUTBACK;
1975 }
1976
1977 return NORMAL;
830} 1978}
831 1979
832static void 1980static void
833api_ready (SV *coro) 1981api_execute_slf (pTHX_ CV *cv, const struct CoroSLF *slf, SV **arg, int items)
834{ 1982{
835 coro_enq (SvREFCNT_inc (coro)); 1983 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
836} 1984 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
837 1985
838static void 1986 if (items > 2)
839api_schedule (int cede) 1987 croak ("Coro only supports a max of two arguments to SLF functions.");
840{
841 SV *prev, *next;
842 1988
843 prev = GvSV (coro_current); 1989 CvFLAGS (cv) |= CVf_SLF;
1990 CvXSUBANY (cv).any_ptr = (void *)slf;
1991 slf_cv = cv;
844 1992
845 if (cede) 1993 /* we patch the op, and then re-run the whole call */
846 coro_enq (SvREFCNT_inc (prev)); 1994 /* we have to put the same argument on the stack for this to work */
1995 /* and this will be done by pp_restore */
1996 slf_restore.op_next = (OP *)&slf_restore;
1997 slf_restore.op_type = OP_NULL;
1998 slf_restore.op_ppaddr = pp_restore;
1999 slf_restore.op_first = PL_op;
847 2000
848 next = coro_deq (PRIO_MIN); 2001 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2002 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
849 2003
850 if (!next) 2004 PL_op->op_ppaddr = pp_slf;
851 next = SvREFCNT_inc (GvSV (coro_idle));
852 2005
853 GvSV (coro_current) = SvREFCNT_inc (next); 2006 PL_op = (OP *)&slf_restore;
854 transfer (aTHX_
855 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
856 sv_to_coro (next, "Coro::schedule", "next coroutine"),
857 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
858 SvREFCNT_dec (next);
859 SvREFCNT_dec (prev);
860} 2007}
861 2008
862MODULE = Coro::State PACKAGE = Coro::State 2009MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
863 2010
864PROTOTYPES: ENABLE 2011PROTOTYPES: DISABLE
865 2012
866BOOT: 2013BOOT:
867{ /* {} necessary for stoopid perl-5.6.x */ 2014{
868 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2015#ifdef USE_ITHREADS
869 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2016 MUTEX_INIT (&coro_lock);
2017# if CORO_PTHREAD
2018 coro_thx = PERL_GET_CONTEXT;
2019# endif
2020#endif
2021 BOOT_PAGESIZE;
2022
2023 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2024 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2025
2026 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2027 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2028 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2029
2030 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2031 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2032 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2033
870 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2034 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
871 2035
872 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2036 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
873 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2037 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
874 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2038 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
875 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2039 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
876
877 if (!padlist_cache)
878 padlist_cache = newHV ();
879 2040
880 main_mainstack = PL_mainstack; 2041 main_mainstack = PL_mainstack;
2042 main_top_env = PL_top_env;
881 2043
2044 while (main_top_env->je_prev)
2045 main_top_env = main_top_env->je_prev;
2046
882 coroapi.ver = CORO_API_VERSION; 2047 coroapi.ver = CORO_API_VERSION;
2048 coroapi.rev = CORO_API_REVISION;
883 coroapi.transfer = api_transfer; 2049 coroapi.transfer = api_transfer;
884} 2050 coroapi.execute_slf = api_execute_slf;
2051 coroapi.sv_state = SvSTATE_;
885 2052
886Coro::State 2053 {
887_newprocess(args) 2054 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
888 SV * args 2055
889 PROTOTYPE: $ 2056 if (!svp) croak ("Time::HiRes is required");
2057 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2058
2059 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2060 }
2061
2062 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2063}
2064
2065SV *
2066new (char *klass, ...)
890 CODE: 2067 CODE:
891 Coro__State coro; 2068{
2069 struct coro *coro;
2070 MAGIC *mg;
2071 HV *hv;
2072 int i;
892 2073
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
894 croak ("Coro::State::_newprocess expects an arrayref");
895
896 New (0, coro, 1, struct coro); 2074 Newz (0, coro, 1, struct coro);
2075 coro->args = newAV ();
2076 coro->flags = CF_NEW;
897 2077
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2078 if (coro_first) coro_first->prev = coro;
899 coro->mainstack = 0; /* actual work is done inside transfer */ 2079 coro->next = coro_first;
900 coro->stack = 0; 2080 coro_first = coro;
901 2081
902 RETVAL = coro; 2082 coro->hv = hv = newHV ();
2083 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2084 mg->mg_flags |= MGf_DUP;
2085 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2086
2087 av_extend (coro->args, items - 1);
2088 for (i = 1; i < items; i++)
2089 av_push (coro->args, newSVsv (ST (i)));
2090}
903 OUTPUT: 2091 OUTPUT:
904 RETVAL 2092 RETVAL
905 2093
906void 2094void
907transfer(prev, next, flags) 2095_set_stacklevel (...)
908 Coro::State_or_hashref prev 2096 CODE:
909 Coro::State_or_hashref next 2097{
910 int flags 2098 static struct CoroSLF slf = { slf_init_set_stacklevel, slf_prepare_set_stacklevel, slf_check_nop };
911 PROTOTYPE: @ 2099 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
912 CODE: 2100}
913 PUTBACK;
914 transfer (aTHX_ prev, next, flags);
915 SPAGAIN;
916 2101
917void 2102void
918DESTROY(coro) 2103transfer (...)
919 Coro::State coro 2104 CODE:
920 CODE: 2105{
2106 static struct CoroSLF slf = { slf_init_transfer, slf_prepare_transfer, slf_check_nop };
2107 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2108}
921 2109
922 if (coro->mainstack && coro->mainstack != main_mainstack) 2110bool
2111_destroy (SV *coro_sv)
2112 CODE:
2113 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2114 OUTPUT:
2115 RETVAL
2116
2117void
2118_exit (int code)
2119 PROTOTYPE: $
2120 CODE:
2121 _exit (code);
2122
2123int
2124cctx_stacksize (int new_stacksize = 0)
2125 CODE:
2126 RETVAL = cctx_stacksize;
2127 if (new_stacksize)
2128 {
2129 cctx_stacksize = new_stacksize;
2130 ++cctx_gen;
2131 }
2132 OUTPUT:
2133 RETVAL
2134
2135int
2136cctx_max_idle (int max_idle = 0)
2137 CODE:
2138 RETVAL = cctx_max_idle;
2139 if (max_idle > 1)
2140 cctx_max_idle = max_idle;
2141 OUTPUT:
2142 RETVAL
2143
2144int
2145cctx_count ()
2146 CODE:
2147 RETVAL = cctx_count;
2148 OUTPUT:
2149 RETVAL
2150
2151int
2152cctx_idle ()
2153 CODE:
2154 RETVAL = cctx_idle;
2155 OUTPUT:
2156 RETVAL
2157
2158void
2159list ()
2160 PPCODE:
2161{
2162 struct coro *coro;
2163 for (coro = coro_first; coro; coro = coro->next)
2164 if (coro->hv)
2165 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2166}
2167
2168void
2169call (Coro::State coro, SV *coderef)
2170 ALIAS:
2171 eval = 1
2172 CODE:
2173{
2174 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
923 { 2175 {
924 struct coro temp; 2176 struct coro temp;
925 2177
2178 if (!(coro->flags & CF_RUNNING))
2179 {
2180 PUTBACK;
2181 save_perl (aTHX_ &temp);
2182 load_perl (aTHX_ coro);
2183 }
2184
2185 {
2186 dSP;
2187 ENTER;
2188 SAVETMPS;
926 PUTBACK; 2189 PUTBACK;
927 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2190 PUSHSTACK;
928 LOAD(aTHX_ coro); 2191 PUSHMARK (SP);
2192
2193 if (ix)
2194 eval_sv (coderef, 0);
2195 else
2196 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2197
2198 POPSTACK;
929 SPAGAIN; 2199 SPAGAIN;
2200 FREETMPS;
2201 LEAVE;
2202 PUTBACK;
2203 }
930 2204
931 destroy_stacks (aTHX); 2205 if (!(coro->flags & CF_RUNNING))
932 2206 {
933 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2207 save_perl (aTHX_ coro);
2208 load_perl (aTHX_ &temp);
934 SPAGAIN; 2209 SPAGAIN;
935 2210 }
936 coro->mainstack = 0;
937 } 2211 }
2212}
938 2213
939 deallocate_stack (coro); 2214SV *
940 2215is_ready (Coro::State coro)
941 Safefree (coro); 2216 PROTOTYPE: $
2217 ALIAS:
2218 is_ready = CF_READY
2219 is_running = CF_RUNNING
2220 is_new = CF_NEW
2221 is_destroyed = CF_DESTROYED
2222 CODE:
2223 RETVAL = boolSV (coro->flags & ix);
2224 OUTPUT:
2225 RETVAL
942 2226
943void 2227void
944flush() 2228throw (Coro::State self, SV *throw = &PL_sv_undef)
945 CODE: 2229 PROTOTYPE: $;$
946#ifdef MAY_FLUSH 2230 CODE:
947 flush_padlist_cache (); 2231 SvREFCNT_dec (self->throw);
948#endif 2232 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
949 2233
950void 2234void
951_exit(code) 2235api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
952 int code 2236 C_ARGS: aTHX_ coro, flags
2237
2238SV *
2239has_cctx (Coro::State coro)
953 PROTOTYPE: $ 2240 PROTOTYPE: $
954 CODE: 2241 CODE:
955#if defined(__GLIBC__) || _POSIX_C_SOURCE 2242 RETVAL = boolSV (!!coro->cctx);
956 _exit (code); 2243 OUTPUT:
957#else 2244 RETVAL
958 signal (SIGTERM, SIG_DFL);
959 raise (SIGTERM);
960 exit (code);
961#endif
962 2245
963MODULE = Coro::State PACKAGE = Coro::Cont 2246int
2247is_traced (Coro::State coro)
2248 PROTOTYPE: $
2249 CODE:
2250 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2251 OUTPUT:
2252 RETVAL
964 2253
965# this is slightly dirty (should expose a c-level api) 2254UV
2255rss (Coro::State coro)
2256 PROTOTYPE: $
2257 ALIAS:
2258 usecount = 1
2259 CODE:
2260 switch (ix)
2261 {
2262 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2263 case 1: RETVAL = coro->usecount; break;
2264 }
2265 OUTPUT:
2266 RETVAL
966 2267
967void 2268void
968yield(...) 2269force_cctx ()
2270 CODE:
2271 struct coro *coro = SvSTATE (coro_current);
2272 coro->cctx->idle_sp = 0;
2273
2274void
2275swap_defsv (Coro::State self)
969 PROTOTYPE: @ 2276 PROTOTYPE: $
2277 ALIAS:
2278 swap_defav = 1
970 CODE: 2279 CODE:
971 static SV *returnstk; 2280 if (!self->slot)
972 SV *sv; 2281 croak ("cannot swap state with coroutine that has no saved state");
973 AV *defav = GvAV (PL_defgv); 2282 else
974 struct coro *prev, *next; 2283 {
2284 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2285 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
975 2286
976 if (!returnstk) 2287 SV *tmp = *src; *src = *dst; *dst = tmp;
977 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2288 }
978
979 /* set up @_ -- ugly */
980 av_clear (defav);
981 av_fill (defav, items - 1);
982 while (items--)
983 av_store (defav, items, SvREFCNT_inc (ST(items)));
984
985 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
986 sv = av_pop ((AV *)SvRV (returnstk));
987 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
988 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
989 SvREFCNT_dec (sv);
990
991 transfer(aTHX_ prev, next, 0);
992 2289
993MODULE = Coro::State PACKAGE = Coro 2290MODULE = Coro::State PACKAGE = Coro
994 2291
995# this is slightly dirty (should expose a c-level api)
996
997BOOT: 2292BOOT:
998{ 2293{
999 int i; 2294 int i;
2295
2296 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2297 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2298 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2299
2300 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2301 SvREADONLY_on (coro_current);
2302
1000 HV *stash = gv_stashpv ("Coro", TRUE); 2303 coro_stash = gv_stashpv ("Coro", TRUE);
1001 2304
1002 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2305 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1003 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2306 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1004 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2307 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1005 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2308 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1006 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2309 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1007 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2310 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1008
1009 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1010 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1011 2311
1012 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2312 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1013 coro_ready[i] = newAV (); 2313 coro_ready[i] = newAV ();
1014 2314
1015 { 2315 {
1016 SV *sv = perl_get_sv("Coro::API", 1); 2316 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1017 2317
1018 coroapi.schedule = api_schedule; 2318 coroapi.schedule = api_schedule;
2319 coroapi.cede = api_cede;
2320 coroapi.cede_notself = api_cede_notself;
1019 coroapi.ready = api_ready; 2321 coroapi.ready = api_ready;
2322 coroapi.is_ready = api_is_ready;
1020 coroapi.nready = &coro_nready; 2323 coroapi.nready = coro_nready;
1021 coroapi.current = coro_current; 2324 coroapi.current = coro_current;
1022 2325
1023 GCoroAPI = &coroapi; 2326 GCoroAPI = &coroapi;
1024 sv_setiv(sv, (IV)&coroapi); 2327 sv_setiv (sv, (IV)&coroapi);
1025 SvREADONLY_on(sv); 2328 SvREADONLY_on (sv);
1026 } 2329 }
1027} 2330}
1028 2331
1029void 2332void
1030ready(self) 2333schedule (...)
1031 SV * self
1032 CODE: 2334 CODE:
1033 api_ready (self); 2335{
2336 static struct CoroSLF slf = { slf_init_nop, prepare_schedule, slf_check_nop };
2337 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2338}
2339
2340void
2341cede (...)
2342 CODE:
2343{
2344 static struct CoroSLF slf = { slf_init_nop, prepare_cede, slf_check_nop };
2345 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2346}
2347
2348void
2349cede_notself (...)
2350 CODE:
2351{
2352 static struct CoroSLF slf = { slf_init_nop, prepare_cede_notself, slf_check_nop };
2353 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2354}
2355
2356void
2357_set_current (SV *current)
2358 PROTOTYPE: $
2359 CODE:
2360 SvREFCNT_dec (SvRV (coro_current));
2361 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2362
2363void
2364_set_readyhook (SV *hook)
2365 PROTOTYPE: $
2366 CODE:
2367 LOCK;
2368 SvREFCNT_dec (coro_readyhook);
2369 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2370 UNLOCK;
1034 2371
1035int 2372int
2373prio (Coro::State coro, int newprio = 0)
2374 ALIAS:
2375 nice = 1
2376 CODE:
2377{
2378 RETVAL = coro->prio;
2379
2380 if (items > 1)
2381 {
2382 if (ix)
2383 newprio = coro->prio - newprio;
2384
2385 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2386 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2387
2388 coro->prio = newprio;
2389 }
2390}
2391 OUTPUT:
2392 RETVAL
2393
2394SV *
2395ready (SV *self)
2396 PROTOTYPE: $
2397 CODE:
2398 RETVAL = boolSV (api_ready (aTHX_ self));
2399 OUTPUT:
2400 RETVAL
2401
2402int
1036nready(...) 2403nready (...)
1037 PROTOTYPE: 2404 PROTOTYPE:
1038 CODE: 2405 CODE:
1039 RETVAL = coro_nready; 2406 RETVAL = coro_nready;
1040 OUTPUT: 2407 OUTPUT:
1041 RETVAL 2408 RETVAL
1042 2409
2410# for async_pool speedup
1043void 2411void
1044schedule(...) 2412_pool_1 (SV *cb)
1045 PROTOTYPE:
1046 ALIAS:
1047 cede = 1
1048 CODE: 2413 CODE:
1049 api_schedule (ix); 2414{
2415 struct coro *coro = SvSTATE (coro_current);
2416 HV *hv = (HV *)SvRV (coro_current);
2417 AV *defav = GvAV (PL_defgv);
2418 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2419 AV *invoke_av;
2420 int i, len;
1050 2421
2422 if (!invoke)
2423 {
2424 SV *old = PL_diehook;
2425 PL_diehook = 0;
2426 SvREFCNT_dec (old);
2427 croak ("\3async_pool terminate\2\n");
2428 }
2429
2430 SvREFCNT_dec (coro->saved_deffh);
2431 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2432
2433 hv_store (hv, "desc", sizeof ("desc") - 1,
2434 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2435
2436 invoke_av = (AV *)SvRV (invoke);
2437 len = av_len (invoke_av);
2438
2439 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2440
2441 if (len > 0)
2442 {
2443 av_fill (defav, len - 1);
2444 for (i = 0; i < len; ++i)
2445 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2446 }
2447
2448 SvREFCNT_dec (invoke);
2449}
2450
2451void
2452_pool_2 (SV *cb)
2453 CODE:
2454{
2455 struct coro *coro = SvSTATE (coro_current);
2456
2457 sv_setsv (cb, &PL_sv_undef);
2458
2459 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2460 coro->saved_deffh = 0;
2461
2462 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2463 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2464 {
2465 SV *old = PL_diehook;
2466 PL_diehook = 0;
2467 SvREFCNT_dec (old);
2468 croak ("\3async_pool terminate\2\n");
2469 }
2470
2471 av_clear (GvAV (PL_defgv));
2472 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2473 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2474
2475 coro->prio = 0;
2476
2477 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2478 api_trace (aTHX_ coro_current, 0);
2479
2480 av_push (av_async_pool, newSVsv (coro_current));
2481}
2482
2483#if 0
2484
2485void
2486_generator_call (...)
2487 PROTOTYPE: @
2488 PPCODE:
2489 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2490 xxxx
2491 abort ();
2492
2493SV *
2494gensub (SV *sub, ...)
2495 PROTOTYPE: &;@
2496 CODE:
2497{
2498 struct coro *coro;
2499 MAGIC *mg;
2500 CV *xcv;
2501 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2502 int i;
2503
2504 CvGV (ncv) = CvGV (cv);
2505 CvFILE (ncv) = CvFILE (cv);
2506
2507 Newz (0, coro, 1, struct coro);
2508 coro->args = newAV ();
2509 coro->flags = CF_NEW;
2510
2511 av_extend (coro->args, items - 1);
2512 for (i = 1; i < items; i++)
2513 av_push (coro->args, newSVsv (ST (i)));
2514
2515 CvISXSUB_on (ncv);
2516 CvXSUBANY (ncv).any_ptr = (void *)coro;
2517
2518 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2519
2520 CvXSUB (ncv) = CvXSUB (xcv);
2521 CvANON_on (ncv);
2522
2523 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2524 RETVAL = newRV_noinc ((SV *)ncv);
2525}
2526 OUTPUT:
2527 RETVAL
2528
2529#endif
2530
2531
2532MODULE = Coro::State PACKAGE = Coro::AIO
2533
2534void
2535_get_state (SV *self)
2536 PPCODE:
2537{
2538 AV *defav = GvAV (PL_defgv);
2539 AV *av = newAV ();
2540 int i;
2541 SV *data_sv = newSV (sizeof (struct io_state));
2542 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2543 SvCUR_set (data_sv, sizeof (struct io_state));
2544 SvPOK_only (data_sv);
2545
2546 data->errorno = errno;
2547 data->laststype = PL_laststype;
2548 data->laststatval = PL_laststatval;
2549 data->statcache = PL_statcache;
2550
2551 av_extend (av, AvFILLp (defav) + 1 + 1);
2552
2553 for (i = 0; i <= AvFILLp (defav); ++i)
2554 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2555
2556 av_push (av, data_sv);
2557
2558 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2559
2560 api_ready (aTHX_ self);
2561}
2562
2563void
2564_set_state (SV *state)
2565 PROTOTYPE: $
2566 PPCODE:
2567{
2568 AV *av = (AV *)SvRV (state);
2569 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2570 int i;
2571
2572 errno = data->errorno;
2573 PL_laststype = data->laststype;
2574 PL_laststatval = data->laststatval;
2575 PL_statcache = data->statcache;
2576
2577 EXTEND (SP, AvFILLp (av));
2578 for (i = 0; i < AvFILLp (av); ++i)
2579 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2580}
2581
2582
2583MODULE = Coro::State PACKAGE = Coro::AnyEvent
2584
2585BOOT:
2586 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2587
2588SV *
2589_schedule (...)
2590 PROTOTYPE: @
2591 CODE:
2592{
2593 static int incede;
2594
2595 api_cede_notself (aTHX);
2596
2597 ++incede;
2598 while (coro_nready >= incede && api_cede (aTHX))
2599 ;
2600
2601 sv_setsv (sv_activity, &PL_sv_undef);
2602 if (coro_nready >= incede)
2603 {
2604 PUSHMARK (SP);
2605 PUTBACK;
2606 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2607 SPAGAIN;
2608 }
2609
2610 --incede;
2611}
2612
2613
2614MODULE = Coro::State PACKAGE = PerlIO::cede
2615
2616BOOT:
2617 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2618

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