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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.190 by root, Fri Oct 5 20:39:39 2007 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#include "libcoro/coro.c" 9#include "patchlevel.h"
10
11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
6 14
7#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
8# include <unistd.h> 16# include <unistd.h>
9# include <sys/mman.h> 17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif
10#endif 24# endif
25# include <limits.h>
26# ifndef PAGESIZE
27# define PAGESIZE pagesize
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
29static long pagesize;
30# else
31# define BOOT_PAGESIZE (void)0
32# endif
33#else
34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
11 37
12#define MAY_FLUSH /* increases codesize */ 38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif
13 44
14#define SUB_INIT "Coro::State::initialize" 45/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8
15 47
16#define TRANSFER_SAVE_DEFAV 0x00000001 48#define PERL_VERSION_ATLEAST(a,b,c) \
17#define TRANSFER_SAVE_DEFSV 0x00000002 49 (PERL_REVISION > (a) \
18#define TRANSFER_SAVE_ERRSV 0x00000004 50 || (PERL_REVISION == (a) \
19#define TRANSFER_SAVE_CCTXT 0x00000008 51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
20 53
21#define TRANSFER_SAVE_ALL -1 54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
22 74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84
85#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
86# undef CORO_STACKGUARD
87#endif
88
89#ifndef CORO_STACKGUARD
90# define CORO_STACKGUARD 0
91#endif
92
93/* prefer perl internal functions over our own? */
94#ifndef CORO_PREFER_PERL_FUNCTIONS
95# define CORO_PREFER_PERL_FUNCTIONS 0
96#endif
97
98/* The next macros try to return the current stack pointer, in an as
99 * portable way as possible. */
100#define dSTACKLEVEL volatile char stacklevel
101#define STACKLEVEL ((void *)&stacklevel)
102
103#define IN_DESTRUCT (PL_main_cv == Nullcv)
104
105#if __GNUC__ >= 3
106# define attribute(x) __attribute__(x)
107# define BARRIER __asm__ __volatile__ ("" : : : "memory")
108#else
109# define attribute(x)
110# define BARRIER
111#endif
112
113#define NOINLINE attribute ((noinline))
114
115#include "CoroAPI.h"
116
117#ifdef USE_ITHREADS
118static perl_mutex coro_mutex;
119# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
120# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
121#else
122# define LOCK (void)0
123# define UNLOCK (void)0
124#endif
125
126/* helper storage struct for Coro::AIO */
127struct io_state
128{
129 int errorno;
130 I32 laststype;
131 int laststatval;
132 Stat_t statcache;
133};
134
135static size_t coro_stacksize = CORO_STACKSIZE;
136static struct CoroAPI coroapi;
137static AV *main_mainstack; /* used to differentiate between $main and others */
138static JMPENV *main_top_env;
139static HV *coro_state_stash, *coro_stash;
140static SV *coro_mortal; /* will be freed after next transfer */
141
142static GV *irsgv; /* $/ */
143static GV *stdoutgv; /* *STDOUT */
144
145/* async_pool helper stuff */
146static SV *sv_pool_rss;
147static SV *sv_pool_size;
148static AV *av_async_pool;
149
150static struct coro_cctx *cctx_first;
151static int cctx_count, cctx_idle;
152
153enum {
154 CC_MAPPED = 0x01,
155 CC_NOREUSE = 0x02, /* throw this away after tracing */
156 CC_TRACE = 0x04,
157 CC_TRACE_SUB = 0x08, /* trace sub calls */
158 CC_TRACE_LINE = 0x10, /* trace each statement */
159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
160};
161
162/* this is a structure representing a c-level coroutine */
163typedef struct coro_cctx {
164 struct coro_cctx *next;
165
166 /* the stack */
167 void *sptr;
168 size_t ssize;
169
170 /* cpu state */
171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
173 JMPENV *top_env;
174 coro_context cctx;
175
176#if CORO_USE_VALGRIND
177 int valgrind_id;
178#endif
179 unsigned char flags;
180} coro_cctx;
181
182enum {
183 CF_RUNNING = 0x0001, /* coroutine is running */
184 CF_READY = 0x0002, /* coroutine is ready */
185 CF_NEW = 0x0004, /* has never been switched to */
186 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
187};
188
189/* this is a structure representing a perl-level coroutine */
23struct coro { 190struct coro {
24 /* the optional C context */ 191 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 192 coro_cctx *cctx;
26 void *sptr;
27 long ssize;
28
29 /* optionally saved, might be zero */
30 AV *defav;
31 SV *defsv;
32 SV *errsv;
33
34 /* saved global state not related to stacks */
35 U8 dowarn;
36
37 /* the stacks and related info (callchain etc..) */
38 PERL_SI *curstackinfo;
39 AV *curstack;
40 AV *mainstack;
41 SV **stack_sp;
42 OP *op;
43 SV **curpad;
44 SV **stack_base;
45 SV **stack_max;
46 SV **tmps_stack;
47 I32 tmps_floor;
48 I32 tmps_ix;
49 I32 tmps_max;
50 I32 *markstack;
51 I32 *markstack_ptr;
52 I32 *markstack_max;
53 I32 *scopestack;
54 I32 scopestack_ix;
55 I32 scopestack_max;
56 ANY *savestack;
57 I32 savestack_ix;
58 I32 savestack_max;
59 OP **retstack;
60 I32 retstack_ix;
61 I32 retstack_max;
62 COP *curcop;
63 JMPENV start_env;
64 JMPENV *top_env;
65 193
66 /* data associated with this coroutine (initial args) */ 194 /* data associated with this coroutine (initial args) */
67 AV *args; 195 AV *args;
196 int refcnt;
197 int flags; /* CF_ flags */
198
199 /* optionally saved, might be zero */
200 AV *defav; /* @_ */
201 SV *defsv; /* $_ */
202 SV *errsv; /* $@ */
203 SV *deffh; /* default filehandle */
204 SV *irssv; /* $/ */
205 SV *irssv_sv; /* real $/ cache */
206
207#define VAR(name,type) type name;
208# include "state.h"
209#undef VAR
210
211 /* statistics */
212 int usecount; /* number of transfers to this coro */
213
214 /* coro process data */
215 int prio;
216 //SV *throw;
217
218 /* async_pool */
219 SV *saved_deffh;
220
221 /* linked list */
222 struct coro *next, *prev;
223 HV *hv; /* the perl hash associated with this coro, if any */
68}; 224};
69 225
70typedef struct coro *Coro__State; 226typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 227typedef struct coro *Coro__State_or_hashref;
72 228
73static AV *main_mainstack; /* used to differentiate between $main and others */ 229/** Coro ********************************************************************/
74static HV *coro_state_stash;
75static HV *padlist_cache;
76 230
77/* mostly copied from op.c:cv_clone2 */ 231#define PRIO_MAX 3
78STATIC AV * 232#define PRIO_HIGH 1
79clone_padlist (AV *protopadlist) 233#define PRIO_NORMAL 0
234#define PRIO_LOW -1
235#define PRIO_IDLE -3
236#define PRIO_MIN -4
237
238/* for Coro.pm */
239static SV *coro_current;
240static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
241static int coro_nready;
242static struct coro *coro_first;
243
244/** lowlevel stuff **********************************************************/
245
246static AV *
247coro_clone_padlist (pTHX_ CV *cv)
80{ 248{
81 AV *av; 249 AV *padlist = CvPADLIST (cv);
82 I32 ix;
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
85 SV **pname = AvARRAY (protopad_name);
86 SV **ppad = AvARRAY (protopad);
87 I32 fname = AvFILLp (protopad_name);
88 I32 fpad = AvFILLp (protopad);
89 AV *newpadlist, *newpad_name, *newpad; 250 AV *newpadlist, *newpad;
90 SV **npad;
91
92 newpad_name = newAV ();
93 for (ix = fname; ix >= 0; ix--)
94 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
95
96 newpad = newAV ();
97 av_fill (newpad, AvFILLp (protopad));
98 npad = AvARRAY (newpad);
99 251
100 newpadlist = newAV (); 252 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 253 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 254#if PERL_VERSION_ATLEAST (5,9,0)
255 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
256#else
257 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
258#endif
259 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
260 --AvFILLp (padlist);
261
262 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 263 av_store (newpadlist, 1, (SV *)newpad);
104 264
105 av = newAV (); /* will be @_ */ 265 return newpadlist;
106 av_extend (av, 0); 266}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 267
110 for (ix = fpad; ix > 0; ix--) 268static void
269free_padlist (pTHX_ AV *padlist)
270{
271 /* may be during global destruction */
272 if (SvREFCNT (padlist))
111 { 273 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 274 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 275 while (i >= 0)
114 { 276 {
115 char *name = SvPVX (namesv); /* XXX */ 277 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 278 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 279 {
120 else
121 { /* our own lexical */
122 SV *sv; 280 SV *sv;
123 if (*name == '&') 281 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 282 SvREFCNT_dec (sv);
125 else if (*name == '@') 283
126 sv = (SV *) newAV (); 284 SvREFCNT_dec (*svp);
127 else if (*name == '%')
128 sv = (SV *) newHV ();
129 else
130 sv = NEWSV (0, 0);
131 if (!SvPADBUSY (sv))
132 SvPADMY_on (sv);
133 npad[ix] = sv;
134 } 285 }
135 } 286 }
136 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
137 {
138 npad[ix] = SvREFCNT_inc (ppad[ix]);
139 }
140 else
141 {
142 SV *sv = NEWSV (0, 0);
143 SvPADTMP_on (sv);
144 npad[ix] = sv;
145 }
146 }
147 287
148#if 0 /* return -ENOTUNDERSTOOD */
149 /* Now that vars are all in place, clone nested closures. */
150
151 for (ix = fpad; ix > 0; ix--) {
152 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
153 if (namesv
154 && namesv != &PL_sv_undef
155 && !(SvFLAGS(namesv) & SVf_FAKE)
156 && *SvPVX(namesv) == '&'
157 && CvCLONE(ppad[ix]))
158 {
159 CV *kid = cv_clone((CV*)ppad[ix]);
160 SvREFCNT_dec(ppad[ix]);
161 CvCLONE_on(kid);
162 SvPADMY_on(kid);
163 npad[ix] = (SV*)kid;
164 }
165 }
166#endif
167
168 return newpadlist;
169}
170
171#ifdef MAY_FLUSH
172STATIC AV *
173free_padlist (AV *padlist)
174{
175 /* may be during global destruction */
176 if (SvREFCNT(padlist))
177 {
178 I32 i = AvFILLp(padlist);
179 while (i >= 0)
180 {
181 SV **svp = av_fetch(padlist, i--, FALSE);
182 SV *sv = svp ? *svp : Nullsv;
183 if (sv)
184 SvREFCNT_dec(sv);
185 }
186
187 SvREFCNT_dec((SV*)padlist); 288 SvREFCNT_dec ((SV*)padlist);
188 } 289 }
189} 290}
190#endif 291
292static int
293coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
294{
295 AV *padlist;
296 AV *av = (AV *)mg->mg_obj;
297
298 /* casting is fun. */
299 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
300 free_padlist (aTHX_ padlist);
301
302 SvREFCNT_dec (av);
303
304 return 0;
305}
306
307#define PERL_MAGIC_coro PERL_MAGIC_ext
308
309static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
310
311#define CORO_MAGIC(cv) \
312 SvMAGIC (cv) \
313 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
314 ? SvMAGIC (cv) \
315 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
316 : 0
317
318static struct coro *
319SvSTATE_ (pTHX_ SV *coro)
320{
321 HV *stash;
322 MAGIC *mg;
323
324 if (SvROK (coro))
325 coro = SvRV (coro);
326
327 if (SvTYPE (coro) != SVt_PVHV)
328 croak ("Coro::State object required");
329
330 stash = SvSTASH (coro);
331 if (stash != coro_stash && stash != coro_state_stash)
332 {
333 /* very slow, but rare, check */
334 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
335 croak ("Coro::State object required");
336 }
337
338 mg = CORO_MAGIC (coro);
339 return (struct coro *)mg->mg_ptr;
340}
341
342#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
191 343
192/* the next two functions merely cache the padlists */ 344/* the next two functions merely cache the padlists */
193STATIC void 345static void
194get_padlist (CV *cv) 346get_padlist (pTHX_ CV *cv)
195{ 347{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 348 MAGIC *mg = CORO_MAGIC (cv);
349 AV *av;
197 350
198 if (he && AvFILLp ((AV *)*he) >= 0) 351 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 352 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 353 else
201 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
202}
203
204STATIC void
205put_padlist (CV *cv)
206{
207 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
208
209 if (SvTYPE (*he) != SVt_PVAV)
210 { 354 {
355#if CORO_PREFER_PERL_FUNCTIONS
356 /* this is probably cleaner, but also slower? */
357 CV *cp = Perl_cv_clone (cv);
358 CvPADLIST (cv) = CvPADLIST (cp);
359 CvPADLIST (cp) = 0;
211 SvREFCNT_dec (*he); 360 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 361#else
362 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
363#endif
213 } 364 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 365}
217 366
218#ifdef MAY_FLUSH 367static void
219STATIC void 368put_padlist (pTHX_ CV *cv)
220flush_padlist_cache ()
221{ 369{
222 HV *hv = padlist_cache; 370 MAGIC *mg = CORO_MAGIC (cv);
223 padlist_cache = newHV (); 371 AV *av;
224 372
225 if (hv_iterinit (hv)) 373 if (!mg)
226 {
227 HE *he;
228 AV *padlist;
229
230 while (!!(he = hv_iternext (hv)))
231 {
232 AV *av = (AV *)HeVAL(he);
233
234 /* casting is fun. */
235 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
236 free_padlist (padlist);
237 }
238 } 374 {
375 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
376 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
377 mg->mg_virtual = &vtbl_coro;
378 mg->mg_obj = (SV *)newAV ();
379 }
239 380
240 SvREFCNT_dec (hv); 381 av = (AV *)mg->mg_obj;
241}
242#endif
243 382
244#define SB do { 383 if (AvFILLp (av) >= AvMAX (av))
245#define SE } while (0) 384 av_extend (av, AvMAX (av) + 1);
246 385
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 386 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 387}
249 388
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 389/** load & save, init *******************************************************/
251 390
252static void 391static void
253load_state(pTHX_ Coro__State c) 392load_perl (pTHX_ Coro__State c)
254{ 393{
255 PL_dowarn = c->dowarn; 394#define VAR(name,type) PL_ ## name = c->name;
395# include "state.h"
396#undef VAR
256 397
257 PL_curstackinfo = c->curstackinfo; 398 GvSV (PL_defgv) = c->defsv;
258 PL_curstack = c->curstack; 399 GvAV (PL_defgv) = c->defav;
259 PL_mainstack = c->mainstack; 400 GvSV (PL_errgv) = c->errsv;
260 PL_stack_sp = c->stack_sp; 401 GvSV (irsgv) = c->irssv_sv;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_stack_base = c->stack_base;
264 PL_stack_max = c->stack_max;
265 PL_tmps_stack = c->tmps_stack;
266 PL_tmps_floor = c->tmps_floor;
267 PL_tmps_ix = c->tmps_ix;
268 PL_tmps_max = c->tmps_max;
269 PL_markstack = c->markstack;
270 PL_markstack_ptr = c->markstack_ptr;
271 PL_markstack_max = c->markstack_max;
272 PL_scopestack = c->scopestack;
273 PL_scopestack_ix = c->scopestack_ix;
274 PL_scopestack_max = c->scopestack_max;
275 PL_savestack = c->savestack;
276 PL_savestack_ix = c->savestack_ix;
277 PL_savestack_max = c->savestack_max;
278 PL_retstack = c->retstack;
279 PL_retstack_ix = c->retstack_ix;
280 PL_retstack_max = c->retstack_max;
281 PL_curcop = c->curcop;
282 PL_start_env = c->start_env;
283 PL_top_env = c->top_env;
284
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
288 402
289 { 403 {
290 dSP; 404 dSP;
291 CV *cv; 405 CV *cv;
292 406
293 /* now do the ugly restore mess */ 407 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 408 while ((cv = (CV *)POPs))
295 { 409 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 410 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 411 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 412 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 413 }
309 414
310 PUTBACK; 415 PUTBACK;
311 } 416 }
312} 417}
313 418
314static void 419static void
315save_state(pTHX_ Coro__State c, int flags) 420save_perl (pTHX_ Coro__State c)
316{ 421{
317 { 422 {
318 dSP; 423 dSP;
319 I32 cxix = cxstack_ix; 424 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 425 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 428 /*
324 * the worst thing you can imagine happens first - we have to save 429 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 430 * (and reinitialize) all cv's in the whole callchain :(
326 */ 431 */
327 432
328 PUSHs (Nullsv); 433 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 434 /* this loop was inspired by pp_caller */
330 for (;;) 435 for (;;)
331 { 436 {
332 do 437 while (cxix >= 0)
333 { 438 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 439 PERL_CONTEXT *cx = &ccstk[cxix--];
335 440
336 if (CxTYPE(cx) == CXt_SUB) 441 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337 { 442 {
338 CV *cv = cx->blk_sub.cv; 443 CV *cv = cx->blk_sub.cv;
444
339 if (CvDEPTH(cv)) 445 if (CvDEPTH (cv))
340 { 446 {
341#ifdef USE_THREADS
342 /*XPUSHs ((SV *)CvOWNER(cv));*/
343 /*CvOWNER(cv) = 0;*/
344 /*error must unlock this cv etc.. etc...*/
345#endif
346 EXTEND (SP, CvDEPTH(cv)*2); 447 EXTEND (SP, 3);
347
348 while (--CvDEPTH(cv))
349 {
350 /* this tells the restore code to increment CvDEPTH */
351 PUSHs (Nullsv);
352 PUSHs ((SV *)cv);
353 }
354
355 PUSHs ((SV *)CvPADLIST(cv)); 448 PUSHs ((SV *)CvPADLIST (cv));
449 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 450 PUSHs ((SV *)cv);
357 451
358 get_padlist (cv); /* this is a monster */ 452 CvDEPTH (cv) = 0;
453 get_padlist (aTHX_ cv);
359 } 454 }
360 } 455 }
361 else if (CxTYPE(cx) == CXt_FORMAT)
362 {
363 /* I never used formats, so how should I know how these are implemented? */
364 /* my bold guess is as a simple, plain sub... */
365 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366 }
367 } 456 }
368 while (cxix >= 0);
369 457
370 if (top_si->si_type == PERLSI_MAIN) 458 if (top_si->si_type == PERLSI_MAIN)
371 break; 459 break;
372 460
373 top_si = top_si->si_prev; 461 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 462 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 463 cxix = top_si->si_cxix;
376 } 464 }
377 465
378 PUTBACK; 466 PUTBACK;
379 } 467 }
380 468
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 469 c->defav = GvAV (PL_defgv);
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 470 c->defsv = DEFSV;
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 471 c->errsv = ERRSV;
472 c->irssv_sv = GvSV (irsgv);
384 473
385 /* I have not the slightest idea of why av_reify is necessary */ 474#define VAR(name,type)c->name = PL_ ## name;
386 /* but if it's missing the defav contents magically get replaced sometimes */ 475# include "state.h"
387 if (c->defav) 476#undef VAR
388 av_reify (c->defav);
389
390 c->dowarn = PL_dowarn;
391
392 c->curstackinfo = PL_curstackinfo;
393 c->curstack = PL_curstack;
394 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp;
396 c->op = PL_op;
397 c->curpad = PL_curpad;
398 c->stack_base = PL_stack_base;
399 c->stack_max = PL_stack_max;
400 c->tmps_stack = PL_tmps_stack;
401 c->tmps_floor = PL_tmps_floor;
402 c->tmps_ix = PL_tmps_ix;
403 c->tmps_max = PL_tmps_max;
404 c->markstack = PL_markstack;
405 c->markstack_ptr = PL_markstack_ptr;
406 c->markstack_max = PL_markstack_max;
407 c->scopestack = PL_scopestack;
408 c->scopestack_ix = PL_scopestack_ix;
409 c->scopestack_max = PL_scopestack_max;
410 c->savestack = PL_savestack;
411 c->savestack_ix = PL_savestack_ix;
412 c->savestack_max = PL_savestack_max;
413 c->retstack = PL_retstack;
414 c->retstack_ix = PL_retstack_ix;
415 c->retstack_max = PL_retstack_max;
416 c->curcop = PL_curcop;
417 c->start_env = PL_start_env;
418 c->top_env = PL_top_env;
419} 477}
420 478
421/* 479/*
422 * allocate various perl stacks. This is an exact copy 480 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 481 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 482 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 483 * not usually need a lot of stackspace.
426 */ 484 */
427STATIC void 485#if CORO_PREFER_PERL_FUNCTIONS
486# define coro_init_stacks init_stacks
487#else
488static void
428coro_init_stacks (pTHX) 489coro_init_stacks (pTHX)
429{ 490{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 491 PL_curstackinfo = new_stackinfo(64, 6);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 492 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 493 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 494 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 495
435 PL_stack_base = AvARRAY(PL_curstack); 496 PL_stack_base = AvARRAY(PL_curstack);
… …
439 New(50,PL_tmps_stack,64,SV*); 500 New(50,PL_tmps_stack,64,SV*);
440 PL_tmps_floor = -1; 501 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 502 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 503 PL_tmps_max = 64;
443 504
444 New(54,PL_markstack,12,I32); 505 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 506 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 507 PL_markstack_max = PL_markstack + 16;
447 508
509#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 510 SET_MARK_OFFSET;
511#endif
449 512
450 New(54,PL_scopestack,12,I32); 513 New(54,PL_scopestack,16,I32);
451 PL_scopestack_ix = 0; 514 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 515 PL_scopestack_max = 16;
453 516
454 New(54,PL_savestack,64,ANY); 517 New(54,PL_savestack,64,ANY);
455 PL_savestack_ix = 0; 518 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 519 PL_savestack_max = 64;
457 520
521#if !PERL_VERSION_ATLEAST (5,9,0)
458 New(54,PL_retstack,8,OP*); 522 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 523 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 524 PL_retstack_max = 4;
525#endif
461} 526}
527#endif
462 528
463/* 529/*
464 * destroy the stacks, the callchain etc... 530 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 531 */
467STATIC void 532static void
468destroy_stacks(pTHX) 533coro_destroy_stacks (pTHX)
469{ 534{
470 /* is this ugly, I ask? */
471 while (PL_scopestack_ix)
472 LEAVE;
473
474 /* sure it is, but more important: is it correct?? :/ */
475 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476 FREETMPS;
477
478 while (PL_curstackinfo->si_next) 535 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 536 PL_curstackinfo = PL_curstackinfo->si_next;
480 537
481 while (PL_curstackinfo) 538 while (PL_curstackinfo)
482 { 539 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 540 PERL_SI *p = PL_curstackinfo->si_prev;
484 541
485 { 542 if (!IN_DESTRUCT)
486 dSP;
487 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488 PUTBACK; /* possibly superfluous */
489 }
490
491 dounwind(-1);
492
493 SvREFCNT_dec(PL_curstackinfo->si_stack); 543 SvREFCNT_dec (PL_curstackinfo->si_stack);
544
494 Safefree(PL_curstackinfo->si_cxstack); 545 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 546 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 547 PL_curstackinfo = p;
497 } 548 }
498 549
499 Safefree(PL_tmps_stack); 550 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 551 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 552 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 553 Safefree (PL_savestack);
554#if !PERL_VERSION_ATLEAST (5,9,0)
503 Safefree(PL_retstack); 555 Safefree (PL_retstack);
504}
505
506static void
507allocate_stack (Coro__State ctx)
508{
509#ifdef HAVE_MMAP
510 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
511 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
512 if (ctx->sptr == (void *)-1)
513#endif 556#endif
514 { 557}
515 /*FIXME*//*D*//* reasonable stack size! */ 558
516 ctx->ssize = 4096 * sizeof (long); 559static size_t
517 New (0, ctx->sptr, 4096, long); 560coro_rss (pTHX_ struct coro *coro)
561{
562 size_t rss = sizeof (*coro);
563
564 if (coro->mainstack)
518 } 565 {
519} 566 if (coro->flags & CF_RUNNING)
567 {
568 #define VAR(name,type)coro->name = PL_ ## name;
569 # include "state.h"
570 #undef VAR
571 }
520 572
521static void 573 rss += sizeof (coro->curstackinfo);
522deallocate_stack (Coro__State ctx) 574 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
523{ 575 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
524#ifdef HAVE_MMAP 576 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
525 munmap (ctx->sptr, ctx->ssize); 577 rss += coro->tmps_max * sizeof (SV *);
526#else 578 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
527 Safefree (ctx->sptr); 579 rss += coro->scopestack_max * sizeof (I32);
528#endif 580 rss += coro->savestack_max * sizeof (ANY);
529}
530 581
531/* might go away together with optional SAVE_CCTXT */ 582#if !PERL_VERSION_ATLEAST (5,9,0)
583 rss += coro->retstack_max * sizeof (OP *);
584#endif
585 }
586
587 return rss;
588}
589
590/** coroutine stack handling ************************************************/
591
532static void 592static void
533setup_coro (void *arg) 593coro_setup (pTHX_ struct coro *coro)
534{ 594{
535 /* 595 /*
536 * emulate part of the perl startup here. 596 * emulate part of the perl startup here.
537 */ 597 */
598 coro_init_stacks (aTHX);
599
600 PL_runops = RUNOPS_DEFAULT;
601 PL_curcop = &PL_compiling;
602 PL_in_eval = EVAL_NULL;
603 PL_comppad = 0;
604 PL_curpm = 0;
605 PL_localizing = 0;
606 PL_dirty = 0;
607 PL_restartop = 0;
608
609 GvSV (PL_defgv) = NEWSV (0, 0);
610 GvAV (PL_defgv) = coro->args; coro->args = 0;
611 GvSV (PL_errgv) = NEWSV (0, 0);
612 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
613 PL_rs = newSVsv (GvSV (irsgv));
614 PL_defoutgv = SvREFCNT_inc (stdoutgv);
615
616 {
617 dSP;
618 LOGOP myop;
619
620 Zero (&myop, 1, LOGOP);
621 myop.op_next = Nullop;
622 myop.op_flags = OPf_WANT_VOID;
623
624 PUSHMARK (SP);
625 XPUSHs (av_shift (GvAV (PL_defgv)));
626 PUTBACK;
627 PL_op = (OP *)&myop;
628 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
629 SPAGAIN;
630 }
631
632 ENTER; /* necessary e.g. for dounwind */
633}
634
635static void
636coro_destroy (pTHX_ struct coro *coro)
637{
638 if (!IN_DESTRUCT)
639 {
640 /* restore all saved variables and stuff */
641 LEAVE_SCOPE (0);
642 assert (PL_tmps_floor == -1);
643
644 /* free all temporaries */
645 FREETMPS;
646 assert (PL_tmps_ix == -1);
647
648 /* unwind all extra stacks */
649 POPSTACK_TO (PL_mainstack);
650
651 /* unwind main stack */
652 dounwind (-1);
653 }
654
655 SvREFCNT_dec (GvSV (PL_defgv));
656 SvREFCNT_dec (GvAV (PL_defgv));
657 SvREFCNT_dec (GvSV (PL_errgv));
658 SvREFCNT_dec (PL_defoutgv);
659 SvREFCNT_dec (PL_rs);
660 SvREFCNT_dec (GvSV (irsgv));
661
662 SvREFCNT_dec (coro->saved_deffh);
663 //SvREFCNT_dec (coro->throw);
664
665 coro_destroy_stacks (aTHX);
666}
667
668static void
669free_coro_mortal (pTHX)
670{
671 if (coro_mortal)
672 {
673 SvREFCNT_dec (coro_mortal);
674 coro_mortal = 0;
675 }
676}
677
678static int
679runops_trace (pTHX)
680{
681 COP *oldcop = 0;
682 int oldcxix = -2;
683 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
684 coro_cctx *cctx = coro->cctx;
685
686 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
687 {
688 PERL_ASYNC_CHECK ();
689
690 if (cctx->flags & CC_TRACE_ALL)
691 {
692 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
693 {
694 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
695 SV **bot, **top;
696 AV *av = newAV (); /* return values */
697 SV **cb;
698 dSP;
699
700 GV *gv = CvGV (cx->blk_sub.cv);
701 SV *fullname = sv_2mortal (newSV (0));
702 if (isGV (gv))
703 gv_efullname3 (fullname, gv, 0);
704
705 bot = PL_stack_base + cx->blk_oldsp + 1;
706 top = cx->blk_gimme == G_ARRAY ? SP + 1
707 : cx->blk_gimme == G_SCALAR ? bot + 1
708 : bot;
709
710 while (bot < top)
711 av_push (av, SvREFCNT_inc (*bot++));
712
713 PL_runops = RUNOPS_DEFAULT;
714 ENTER;
715 SAVETMPS;
716 EXTEND (SP, 3);
717 PUSHMARK (SP);
718 PUSHs (&PL_sv_no);
719 PUSHs (fullname);
720 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
721 PUTBACK;
722 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
723 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
724 SPAGAIN;
725 FREETMPS;
726 LEAVE;
727 PL_runops = runops_trace;
728 }
729
730 if (oldcop != PL_curcop)
731 {
732 oldcop = PL_curcop;
733
734 if (PL_curcop != &PL_compiling)
735 {
736 SV **cb;
737
738 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
739 {
740 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
741
742 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
743 {
744 runops_proc_t old_runops = PL_runops;
745 dSP;
746 GV *gv = CvGV (cx->blk_sub.cv);
747 SV *fullname = sv_2mortal (newSV (0));
748
749 if (isGV (gv))
750 gv_efullname3 (fullname, gv, 0);
751
752 PL_runops = RUNOPS_DEFAULT;
753 ENTER;
754 SAVETMPS;
755 EXTEND (SP, 3);
756 PUSHMARK (SP);
757 PUSHs (&PL_sv_yes);
758 PUSHs (fullname);
759 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
760 PUTBACK;
761 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
762 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
763 SPAGAIN;
764 FREETMPS;
765 LEAVE;
766 PL_runops = runops_trace;
767 }
768
769 oldcxix = cxstack_ix;
770 }
771
772 if (cctx->flags & CC_TRACE_LINE)
773 {
774 dSP;
775
776 PL_runops = RUNOPS_DEFAULT;
777 ENTER;
778 SAVETMPS;
779 EXTEND (SP, 3);
780 PL_runops = RUNOPS_DEFAULT;
781 PUSHMARK (SP);
782 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
783 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
784 PUTBACK;
785 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
786 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
787 SPAGAIN;
788 FREETMPS;
789 LEAVE;
790 PL_runops = runops_trace;
791 }
792 }
793 }
794 }
795 }
796
797 TAINT_NOT;
798 return 0;
799}
800
801/* inject a fake call to Coro::State::_cctx_init into the execution */
802/* _cctx_init should be careful, as it could be called at almost any time */
803/* during execution of a perl program */
804static void NOINLINE
805prepare_cctx (pTHX_ coro_cctx *cctx)
806{
538 dSP; 807 dSP;
539 Coro__State ctx = (Coro__State)arg; 808 LOGOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 809
542 coro_init_stacks (aTHX); 810 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 811
812 if (cctx->flags & CC_TRACE)
813 PL_runops = runops_trace;
814
815 Zero (&myop, 1, LOGOP);
816 myop.op_next = PL_op;
817 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
818
819 PUSHMARK (SP);
820 EXTEND (SP, 2);
821 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
822 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
823 PUTBACK;
824 PL_op = (OP *)&myop;
825 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 826 SPAGAIN;
827}
545 828
546 /*PL_curcop = 0;*/ 829/*
547 SvREFCNT_dec (GvAV (PL_defgv)); 830 * this is a _very_ stripped down perl interpreter ;)
548 GvAV (PL_defgv) = ctx->args; 831 */
832static void
833coro_run (void *arg)
834{
835 dTHX;
549 836
550 if (ctx->sptr) 837 /* coro_run is the alternative tail of transfer(), so unlock here. */
838 UNLOCK;
839
840 /* we now skip the entersub that lead to transfer() */
841 PL_op = PL_op->op_next;
842
843 /* inject a fake subroutine call to cctx_init */
844 prepare_cctx (aTHX_ (coro_cctx *)arg);
845
846 /* somebody or something will hit me for both perl_run and PL_restartop */
847 PL_restartop = PL_op;
848 perl_run (PL_curinterp);
849
850 /*
851 * If perl-run returns we assume exit() was being called or the coro
852 * fell off the end, which seems to be the only valid (non-bug)
853 * reason for perl_run to return. We try to exit by jumping to the
854 * bootstrap-time "top" top_env, as we cannot restore the "main"
855 * coroutine as Coro has no such concept
856 */
857 PL_top_env = main_top_env;
858 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
859}
860
861static coro_cctx *
862cctx_new ()
863{
864 coro_cctx *cctx;
865 void *stack_start;
866 size_t stack_size;
867
868 ++cctx_count;
869
870 Newz (0, cctx, 1, coro_cctx);
871
872#if HAVE_MMAP
873
874 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
875 /* mmap supposedly does allocate-on-write for us */
876 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
877
878 if (cctx->sptr != (void *)-1)
551 { 879 {
552 PUSHMARK(SP); 880# if CORO_STACKGUARD
553 PUTBACK; 881 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 882# endif
555 croak ("FATAL: CCTXT coroutine returned!"); 883 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
884 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
885 cctx->flags |= CC_MAPPED;
556 } 886 }
557 else 887 else
558 { 888#endif
559 UNOP myop;
560
561 PL_op = (OP *)&myop;
562
563 Zero(&myop, 1, UNOP);
564 myop.op_next = Nullop;
565 myop.op_flags = OPf_WANT_VOID;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 /*
570 * the next line is slightly wrong, as PL_op->op_next
571 * is actually being executed so we skip the first op.
572 * that doesn't matter, though, since it is only
573 * pp_nextstate and we never return...
574 * ah yes, and I don't care anyways ;)
575 */
576 PUTBACK;
577 PL_op = pp_entersub();
578 SPAGAIN;
579
580 ENTER; /* necessary e.g. for dounwind */
581 } 889 {
582} 890 cctx->ssize = coro_stacksize * (long)sizeof (long);
891 New (0, cctx->sptr, coro_stacksize, long);
583 892
584STATIC void 893 if (!cctx->sptr)
894 {
895 perror ("FATAL: unable to allocate stack for coroutine");
896 _exit (EXIT_FAILURE);
897 }
898
899 stack_start = cctx->sptr;
900 stack_size = cctx->ssize;
901 }
902
903 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
904 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
905
906 return cctx;
907}
908
909static void
910cctx_destroy (coro_cctx *cctx)
911{
912 if (!cctx)
913 return;
914
915 --cctx_count;
916
917#if CORO_USE_VALGRIND
918 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
919#endif
920
921#if HAVE_MMAP
922 if (cctx->flags & CC_MAPPED)
923 munmap (cctx->sptr, cctx->ssize);
924 else
925#endif
926 Safefree (cctx->sptr);
927
928 Safefree (cctx);
929}
930
931static coro_cctx *
932cctx_get (pTHX)
933{
934 while (cctx_first)
935 {
936 coro_cctx *cctx = cctx_first;
937 cctx_first = cctx->next;
938 --cctx_idle;
939
940 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
941 return cctx;
942
943 cctx_destroy (cctx);
944 }
945
946 return cctx_new ();
947}
948
949static void
950cctx_put (coro_cctx *cctx)
951{
952 /* free another cctx if overlimit */
953 if (cctx_idle >= MAX_IDLE_CCTX)
954 {
955 coro_cctx *first = cctx_first;
956 cctx_first = first->next;
957 --cctx_idle;
958
959 cctx_destroy (first);
960 }
961
962 ++cctx_idle;
963 cctx->next = cctx_first;
964 cctx_first = cctx;
965}
966
967/** coroutine switching *****************************************************/
968
969static void NOINLINE
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 970transfer_check (pTHX_ struct coro *prev, struct coro *next)
586{ 971{
587 dSP;
588
589 if (prev != next) 972 if (prev != next)
590 { 973 {
591 /* 974 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
592 * this could be done in newprocess which would lead to 975 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
593 * extremely elegant and fast (basically just SAVE/LOAD) 976
594 * code here, but lazy allocation of stacks has also 977 if (next->flags & CF_RUNNING)
595 * some virtues and the overhead of the if() is nil. 978 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
596 */ 979
597 if (next->mainstack) 980 if (next->flags & CF_DESTROYED)
981 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
982
983 if (PL_lex_state != LEX_NOTPARSING)
984 croak ("Coro::State::transfer called while parsing, but this is not supported");
985 }
986}
987
988/* always use the TRANSFER macro */
989static void NOINLINE
990transfer (pTHX_ struct coro *prev, struct coro *next)
991{
992 dSTACKLEVEL;
993
994 /* sometimes transfer is only called to set idle_sp */
995 if (!next)
996 {
997 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
998 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
999 }
1000 else if (prev != next)
1001 {
1002 coro_cctx *prev__cctx;
1003
1004 if (prev->flags & CF_NEW)
598 { 1005 {
599 SAVE (prev, flags); 1006 /* create a new empty context */
600 LOAD (next); 1007 Newz (0, prev->cctx, 1, coro_cctx);
601 1008 prev->flags &= ~CF_NEW;
602 /* mark this state as in-use */ 1009 prev->flags |= CF_RUNNING;
603 next->mainstack = 0;
604 next->tmps_ix = -2;
605
606 if (flags & TRANSFER_SAVE_CCTXT)
607 {
608 if (!next->ssize)
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611 if (!prev->ssize)
612 prev->ssize = 1; /* mark cctx as valid ;) */
613
614 coro_transfer (&(prev->cctx), &(next->cctx));
615 }
616
617 } 1010 }
618 else if (next->tmps_ix == -2) 1011
619 croak ("tried to transfer to running coroutine"); 1012 prev->flags &= ~CF_RUNNING;
1013 next->flags |= CF_RUNNING;
1014
1015 LOCK;
1016
1017 if (next->flags & CF_NEW)
1018 {
1019 /* need to start coroutine */
1020 next->flags &= ~CF_NEW;
1021 /* first get rid of the old state */
1022 save_perl (aTHX_ prev);
1023 /* setup coroutine call */
1024 coro_setup (aTHX_ next);
1025 }
620 else 1026 else
621 { 1027 {
622 SAVE (prev, -1); /* first get rid of the old state */ 1028 /* coroutine already started */
623 1029 save_perl (aTHX_ prev);
624 if (flags & TRANSFER_SAVE_CCTXT) 1030 load_perl (aTHX_ next);
625 {
626 if (!next->ssize)
627 {
628 allocate_stack (next);
629 coro_create (&(next->cctx),
630 setup_coro, (void *)next,
631 next->sptr, next->ssize);
632 }
633
634 if (!prev->ssize)
635 prev->ssize = 1; /* mark cctx as valid ;) */
636
637 coro_transfer (&(prev->cctx), &(next->cctx));
638 }
639 else
640 setup_coro (next);
641 } 1031 }
1032
1033 prev__cctx = prev->cctx;
1034
1035 /* possibly "free" the cctx */
1036 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1037 {
1038 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1039 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1040
1041 prev->cctx = 0;
1042
1043 cctx_put (prev__cctx);
1044 }
1045
1046 ++next->usecount;
1047
1048 if (!next->cctx)
1049 next->cctx = cctx_get (aTHX);
1050
1051 if (prev__cctx != next->cctx)
1052 {
1053 prev__cctx->top_env = PL_top_env;
1054 PL_top_env = next->cctx->top_env;
1055 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1056 }
1057
1058 free_coro_mortal (aTHX);
1059 UNLOCK;
1060 }
1061}
1062
1063struct transfer_args
1064{
1065 struct coro *prev, *next;
1066};
1067
1068#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1069#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1070
1071/** high level stuff ********************************************************/
1072
1073static int
1074coro_state_destroy (pTHX_ struct coro *coro)
1075{
1076 if (coro->flags & CF_DESTROYED)
1077 return 0;
1078
1079 coro->flags |= CF_DESTROYED;
1080
1081 if (coro->flags & CF_READY)
642 } 1082 {
643} 1083 /* reduce nready, as destroying a ready coro effectively unreadies it */
1084 /* alternative: look through all ready queues and remove the coro */
1085 LOCK;
1086 --coro_nready;
1087 UNLOCK;
1088 }
1089 else
1090 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
644 1091
1092 if (coro->mainstack && coro->mainstack != main_mainstack)
1093 {
1094 struct coro temp;
1095
1096 if (coro->flags & CF_RUNNING)
1097 croak ("FATAL: tried to destroy currently running coroutine");
1098
1099 save_perl (aTHX_ &temp);
1100 load_perl (aTHX_ coro);
1101
1102 coro_destroy (aTHX_ coro);
1103
1104 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1105
1106 coro->mainstack = 0;
1107 }
1108
1109 cctx_destroy (coro->cctx);
1110 SvREFCNT_dec (coro->args);
1111
1112 if (coro->next) coro->next->prev = coro->prev;
1113 if (coro->prev) coro->prev->next = coro->next;
1114 if (coro == coro_first) coro_first = coro->next;
1115
1116 return 1;
1117}
1118
1119static int
1120coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1121{
1122 struct coro *coro = (struct coro *)mg->mg_ptr;
1123 mg->mg_ptr = 0;
1124
1125 coro->hv = 0;
1126
1127 if (--coro->refcnt < 0)
1128 {
1129 coro_state_destroy (aTHX_ coro);
1130 Safefree (coro);
1131 }
1132
1133 return 0;
1134}
1135
1136static int
1137coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1138{
1139 struct coro *coro = (struct coro *)mg->mg_ptr;
1140
1141 ++coro->refcnt;
1142
1143 return 0;
1144}
1145
1146static MGVTBL coro_state_vtbl = {
1147 0, 0, 0, 0,
1148 coro_state_free,
1149 0,
1150#ifdef MGf_DUP
1151 coro_state_dup,
1152#else
1153# define MGf_DUP 0
1154#endif
1155};
1156
1157static void
1158prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1159{
1160 ta->prev = SvSTATE (prev_sv);
1161 ta->next = SvSTATE (next_sv);
1162 TRANSFER_CHECK (*ta);
1163}
1164
1165static void
1166api_transfer (SV *prev_sv, SV *next_sv)
1167{
1168 dTHX;
1169 struct transfer_args ta;
1170
1171 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1172 TRANSFER (ta);
1173}
1174
1175/** Coro ********************************************************************/
1176
1177static void
1178coro_enq (pTHX_ SV *coro_sv)
1179{
1180 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1181}
1182
1183static SV *
1184coro_deq (pTHX_ int min_prio)
1185{
1186 int prio = PRIO_MAX - PRIO_MIN;
1187
1188 min_prio -= PRIO_MIN;
1189 if (min_prio < 0)
1190 min_prio = 0;
1191
1192 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1193 if (AvFILLp (coro_ready [prio]) >= 0)
1194 return av_shift (coro_ready [prio]);
1195
1196 return 0;
1197}
1198
1199static int
1200api_ready (SV *coro_sv)
1201{
1202 dTHX;
1203 struct coro *coro;
1204
1205 if (SvROK (coro_sv))
1206 coro_sv = SvRV (coro_sv);
1207
1208 coro = SvSTATE (coro_sv);
1209
1210 if (coro->flags & CF_READY)
1211 return 0;
1212
1213 coro->flags |= CF_READY;
1214
1215 LOCK;
1216 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1217 ++coro_nready;
1218 UNLOCK;
1219
1220 return 1;
1221}
1222
1223static int
1224api_is_ready (SV *coro_sv)
1225{
1226 dTHX;
1227 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1228}
1229
1230static void
1231prepare_schedule (pTHX_ struct transfer_args *ta)
1232{
1233 SV *prev_sv, *next_sv;
1234
1235 for (;;)
1236 {
1237 LOCK;
1238 next_sv = coro_deq (aTHX_ PRIO_MIN);
1239
1240 /* nothing to schedule: call the idle handler */
1241 if (!next_sv)
1242 {
1243 dSP;
1244 UNLOCK;
1245
1246 ENTER;
1247 SAVETMPS;
1248
1249 PUSHMARK (SP);
1250 PUTBACK;
1251 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1252
1253 FREETMPS;
1254 LEAVE;
1255 continue;
1256 }
1257
1258 ta->next = SvSTATE (next_sv);
1259
1260 /* cannot transfer to destroyed coros, skip and look for next */
1261 if (ta->next->flags & CF_DESTROYED)
1262 {
1263 UNLOCK;
1264 SvREFCNT_dec (next_sv);
1265 /* coro_nready is already taken care of by destroy */
1266 continue;
1267 }
1268
1269 --coro_nready;
1270 UNLOCK;
1271 break;
1272 }
1273
1274 /* free this only after the transfer */
1275 prev_sv = SvRV (coro_current);
1276 ta->prev = SvSTATE (prev_sv);
1277 TRANSFER_CHECK (*ta);
1278 assert (ta->next->flags & CF_READY);
1279 ta->next->flags &= ~CF_READY;
1280 SvRV_set (coro_current, next_sv);
1281
1282 LOCK;
1283 free_coro_mortal (aTHX);
1284 coro_mortal = prev_sv;
1285 UNLOCK;
1286}
1287
1288static void
1289prepare_cede (pTHX_ struct transfer_args *ta)
1290{
1291 api_ready (coro_current);
1292 prepare_schedule (aTHX_ ta);
1293}
1294
1295static int
1296prepare_cede_notself (pTHX_ struct transfer_args *ta)
1297{
1298 if (coro_nready)
1299 {
1300 SV *prev = SvRV (coro_current);
1301 prepare_schedule (aTHX_ ta);
1302 api_ready (prev);
1303 return 1;
1304 }
1305 else
1306 return 0;
1307}
1308
1309static void
1310api_schedule (void)
1311{
1312 dTHX;
1313 struct transfer_args ta;
1314
1315 prepare_schedule (aTHX_ &ta);
1316 TRANSFER (ta);
1317}
1318
1319static int
1320api_cede (void)
1321{
1322 dTHX;
1323 struct transfer_args ta;
1324
1325 prepare_cede (aTHX_ &ta);
1326
1327 if (ta.prev != ta.next)
1328 {
1329 TRANSFER (ta);
1330 return 1;
1331 }
1332 else
1333 return 0;
1334}
1335
1336static int
1337api_cede_notself (void)
1338{
1339 dTHX;
1340 struct transfer_args ta;
1341
1342 if (prepare_cede_notself (aTHX_ &ta))
1343 {
1344 TRANSFER (ta);
1345 return 1;
1346 }
1347 else
1348 return 0;
1349}
1350
1351static void
1352api_trace (SV *coro_sv, int flags)
1353{
1354 dTHX;
1355 struct coro *coro = SvSTATE (coro_sv);
1356
1357 if (flags & CC_TRACE)
1358 {
1359 if (!coro->cctx)
1360 coro->cctx = cctx_new ();
1361 else if (!(coro->cctx->flags & CC_TRACE))
1362 croak ("cannot enable tracing on coroutine with custom stack");
1363
1364 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1365 }
1366 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1367 {
1368 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1369
1370 if (coro->flags & CF_RUNNING)
1371 PL_runops = RUNOPS_DEFAULT;
1372 else
1373 coro->runops = RUNOPS_DEFAULT;
1374 }
1375}
1376
645MODULE = Coro::State PACKAGE = Coro::State 1377MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
646 1378
647PROTOTYPES: ENABLE 1379PROTOTYPES: DISABLE
648 1380
649BOOT: 1381BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */ 1382{
1383#ifdef USE_ITHREADS
1384 MUTEX_INIT (&coro_mutex);
1385#endif
1386 BOOT_PAGESIZE;
1387
1388 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1389 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1390
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE); 1391 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652 1392
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1393 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1394 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1395 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1396 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660 1397
661 main_mainstack = PL_mainstack; 1398 main_mainstack = PL_mainstack;
662} 1399 main_top_env = PL_top_env;
663 1400
664Coro::State 1401 while (main_top_env->je_prev)
665_newprocess(args) 1402 main_top_env = main_top_env->je_prev;
666 SV * args 1403
667 PROTOTYPE: $ 1404 coroapi.ver = CORO_API_VERSION;
1405 coroapi.transfer = api_transfer;
1406
1407 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1408}
1409
1410SV *
1411new (char *klass, ...)
668 CODE: 1412 CODE:
669 Coro__State coro; 1413{
1414 struct coro *coro;
1415 HV *hv;
1416 int i;
670 1417
671 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
672 croak ("Coro::State::_newprocess expects an arrayref");
673
674 New (0, coro, 1, struct coro); 1418 Newz (0, coro, 1, struct coro);
1419 coro->args = newAV ();
1420 coro->flags = CF_NEW;
675 1421
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1422 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1423 coro->next = coro_first;
678 coro->sptr = 0; 1424 coro_first = coro;
679 coro->ssize = 0;
680 1425
681 RETVAL = coro; 1426 coro->hv = hv = newHV ();
1427 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1428 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1429
1430 for (i = 1; i < items; i++)
1431 av_push (coro->args, newSVsv (ST (i)));
1432}
682 OUTPUT: 1433 OUTPUT:
683 RETVAL 1434 RETVAL
684 1435
1436# these not obviously related functions are all rolled into the same xs
1437# function to increase chances that they all will call transfer with the same
1438# stack offset
685void 1439void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1440_set_stacklevel (...)
687 Coro::State_or_hashref prev 1441 ALIAS:
688 Coro::State_or_hashref next 1442 Coro::State::transfer = 1
689 int flags 1443 Coro::schedule = 2
690 PROTOTYPE: @ 1444 Coro::cede = 3
1445 Coro::cede_notself = 4
691 CODE: 1446 CODE:
692 transfer (aTHX_ prev, next, flags); 1447{
1448 struct transfer_args ta;
1449
1450 switch (ix)
1451 {
1452 case 0:
1453 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1454 ta.next = 0;
1455 break;
1456
1457 case 1:
1458 if (items != 2)
1459 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1460
1461 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1462 break;
1463
1464 case 2:
1465 prepare_schedule (aTHX_ &ta);
1466 break;
1467
1468 case 3:
1469 prepare_cede (aTHX_ &ta);
1470 break;
1471
1472 case 4:
1473 if (!prepare_cede_notself (aTHX_ &ta))
1474 XSRETURN_EMPTY;
1475
1476 break;
1477 }
1478
1479 BARRIER;
1480 TRANSFER (ta);
1481
1482 if (GIMME_V != G_VOID && ta.next != ta.prev)
1483 XSRETURN_YES;
1484}
1485
1486bool
1487_destroy (SV *coro_sv)
1488 CODE:
1489 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1490 OUTPUT:
1491 RETVAL
693 1492
694void 1493void
695DESTROY(coro) 1494_exit (code)
696 Coro::State coro 1495 int code
697 CODE: 1496 PROTOTYPE: $
1497 CODE:
1498 _exit (code);
698 1499
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1500int
1501cctx_stacksize (int new_stacksize = 0)
1502 CODE:
1503 RETVAL = coro_stacksize;
1504 if (new_stacksize)
1505 coro_stacksize = new_stacksize;
1506 OUTPUT:
1507 RETVAL
1508
1509int
1510cctx_count ()
1511 CODE:
1512 RETVAL = cctx_count;
1513 OUTPUT:
1514 RETVAL
1515
1516int
1517cctx_idle ()
1518 CODE:
1519 RETVAL = cctx_idle;
1520 OUTPUT:
1521 RETVAL
1522
1523void
1524list ()
1525 PPCODE:
1526{
1527 struct coro *coro;
1528 for (coro = coro_first; coro; coro = coro->next)
1529 if (coro->hv)
1530 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1531}
1532
1533void
1534call (Coro::State coro, SV *coderef)
1535 ALIAS:
1536 eval = 1
1537 CODE:
1538{
1539 if (coro->mainstack)
700 { 1540 {
701 struct coro temp; 1541 struct coro temp;
1542 Zero (&temp, 1, struct coro);
702 1543
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1544 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 1545 {
1546 save_perl (aTHX_ &temp);
1547 load_perl (aTHX_ coro);
1548 }
705 1549
706 destroy_stacks (aTHX); 1550 {
1551 dSP;
1552 ENTER;
1553 SAVETMPS;
1554 PUSHMARK (SP);
1555 PUTBACK;
1556 if (ix)
1557 eval_sv (coderef, 0);
1558 else
1559 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1560 SPAGAIN;
1561 FREETMPS;
1562 LEAVE;
1563 PUTBACK;
1564 }
707 1565
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1566 if (!(coro->flags & CF_RUNNING))
709 1567 {
710 coro->mainstack = 0; 1568 save_perl (aTHX_ coro);
1569 load_perl (aTHX_ &temp);
1570 }
711 } 1571 }
1572}
712 1573
713 if (coro->sptr) 1574SV *
1575is_ready (Coro::State coro)
1576 PROTOTYPE: $
1577 ALIAS:
1578 is_ready = CF_READY
1579 is_running = CF_RUNNING
1580 is_new = CF_NEW
1581 is_destroyed = CF_DESTROYED
1582 CODE:
1583 RETVAL = boolSV (coro->flags & ix);
1584 OUTPUT:
1585 RETVAL
1586
1587void
1588api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1589
1590SV *
1591has_stack (Coro::State coro)
1592 PROTOTYPE: $
1593 CODE:
1594 RETVAL = boolSV (!!coro->cctx);
1595 OUTPUT:
1596 RETVAL
1597
1598int
1599is_traced (Coro::State coro)
1600 PROTOTYPE: $
1601 CODE:
1602 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1603 OUTPUT:
1604 RETVAL
1605
1606IV
1607rss (Coro::State coro)
1608 PROTOTYPE: $
1609 ALIAS:
1610 usecount = 1
1611 CODE:
1612 switch (ix)
1613 {
1614 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1615 case 1: RETVAL = coro->usecount; break;
1616 }
1617 OUTPUT:
1618 RETVAL
1619
1620
1621MODULE = Coro::State PACKAGE = Coro
1622
1623BOOT:
1624{
1625 int i;
1626
1627 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1628 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1629 av_async_pool = get_av ("Coro::async_pool", TRUE);
1630
1631 coro_current = get_sv ("Coro::current", FALSE);
1632 SvREADONLY_on (coro_current);
1633
1634 coro_stash = gv_stashpv ("Coro", TRUE);
1635
1636 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1637 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1638 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1639 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1640 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1641 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1642
1643 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1644 coro_ready[i] = newAV ();
1645
1646 {
1647 SV *sv = perl_get_sv("Coro::API", 1);
1648
1649 coroapi.schedule = api_schedule;
1650 coroapi.cede = api_cede;
1651 coroapi.cede_notself = api_cede_notself;
1652 coroapi.ready = api_ready;
1653 coroapi.is_ready = api_is_ready;
1654 coroapi.nready = &coro_nready;
1655 coroapi.current = coro_current;
1656
1657 GCoroAPI = &coroapi;
1658 sv_setiv (sv, (IV)&coroapi);
1659 SvREADONLY_on (sv);
1660 }
1661}
1662
1663void
1664_set_current (SV *current)
1665 PROTOTYPE: $
1666 CODE:
1667 SvREFCNT_dec (SvRV (coro_current));
1668 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1669
1670int
1671prio (Coro::State coro, int newprio = 0)
1672 ALIAS:
1673 nice = 1
1674 CODE:
1675{
1676 RETVAL = coro->prio;
1677
1678 if (items > 1)
714 { 1679 {
715 deallocate_stack (coro); 1680 if (ix)
1681 newprio = coro->prio - newprio;
1682
1683 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1684 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1685
716 coro->sptr = 0; 1686 coro->prio = newprio;
717 } 1687 }
1688}
1689 OUTPUT:
1690 RETVAL
718 1691
719 Safefree (coro); 1692SV *
1693ready (SV *self)
1694 PROTOTYPE: $
1695 CODE:
1696 RETVAL = boolSV (api_ready (self));
1697 OUTPUT:
1698 RETVAL
720 1699
1700int
1701nready (...)
1702 PROTOTYPE:
1703 CODE:
1704 RETVAL = coro_nready;
1705 OUTPUT:
1706 RETVAL
1707
1708# for async_pool speedup
721void 1709void
722flush() 1710_pool_1 (SV *cb)
723 CODE: 1711 CODE:
724#ifdef MAY_FLUSH 1712{
725 flush_padlist_cache (); 1713 struct coro *coro = SvSTATE (coro_current);
726#endif 1714 HV *hv = (HV *)SvRV (coro_current);
1715 AV *defav = GvAV (PL_defgv);
1716 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1717 AV *invoke_av;
1718 int i, len;
727 1719
728MODULE = Coro::State PACKAGE = Coro::Cont 1720 if (!invoke)
1721 croak ("\3terminate\2\n");
729 1722
730# this is slightly dirty 1723 SvREFCNT_dec (coro->saved_deffh);
1724 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1725
1726 hv_store (hv, "desc", sizeof ("desc") - 1,
1727 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1728
1729 invoke_av = (AV *)SvRV (invoke);
1730 len = av_len (invoke_av);
1731
1732 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1733
1734 if (len > 0)
1735 {
1736 av_fill (defav, len - 1);
1737 for (i = 0; i < len; ++i)
1738 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1739 }
1740
1741 SvREFCNT_dec (invoke);
1742}
731 1743
732void 1744void
733yield(...) 1745_pool_2 (SV *cb)
1746 CODE:
1747{
1748 struct coro *coro = SvSTATE (coro_current);
1749
1750 sv_setsv (cb, &PL_sv_undef);
1751
1752 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1753 coro->saved_deffh = 0;
1754
1755 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1756 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1757 croak ("\3terminate\2\n");
1758
1759 av_clear (GvAV (PL_defgv));
1760 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1761 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1762
1763 coro->prio = 0;
1764
1765 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1766 api_trace (coro_current, 0);
1767
1768 av_push (av_async_pool, newSVsv (coro_current));
1769}
1770
1771
1772MODULE = Coro::State PACKAGE = Coro::AIO
1773
1774SV *
1775_get_state ()
1776 CODE:
1777{
1778 struct io_state *data;
1779
1780 RETVAL = newSV (sizeof (struct io_state));
1781 data = (struct io_state *)SvPVX (RETVAL);
1782 SvCUR_set (RETVAL, sizeof (struct io_state));
1783 SvPOK_only (RETVAL);
1784
1785 data->errorno = errno;
1786 data->laststype = PL_laststype;
1787 data->laststatval = PL_laststatval;
1788 data->statcache = PL_statcache;
1789}
1790 OUTPUT:
1791 RETVAL
1792
1793void
1794_set_state (char *data_)
734 PROTOTYPE: @ 1795 PROTOTYPE: $
735 CODE: 1796 CODE:
736 static SV *returnstk; 1797{
737 SV *sv; 1798 struct io_state *data = (void *)data_;
738 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next;
740 1799
741 if (!returnstk) 1800 errno = data->errorno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1801 PL_laststype = data->laststype;
1802 PL_laststatval = data->laststatval;
1803 PL_statcache = data->statcache;
1804}
743 1805
744 /* set up @_ -- ugly */
745 av_clear (defav);
746 av_fill (defav, items - 1);
747 while (items--)
748 av_store (defav, items, SvREFCNT_inc (ST(items)));
749
750 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
751 sv = av_pop ((AV *)SvRV (returnstk));
752 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
753 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
754 SvREFCNT_dec (sv);
755
756 transfer(aTHX_ prev, next, 0);
757

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