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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 1.186 by root, Fri Oct 5 20:10:42 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#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif
87
88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
92
93/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory")
103#else
104# define attribute(x)
105# define BARRIER
106#endif
107
108#define NOINLINE attribute ((noinline))
109
110#include "CoroAPI.h"
111
112#ifdef USE_ITHREADS
113static perl_mutex coro_mutex;
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif
120
121/* helper storage struct for Coro::AIO */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129
130static size_t coro_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */
136
137static GV *irsgv; /* $/ */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static AV *av_async_pool;
143
144static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle;
146
147enum {
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx {
158 struct coro_cctx *next;
159
160 /* the stack */
161 void *sptr;
162 size_t ssize;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env;
168 coro_context cctx;
169
170#if CORO_USE_VALGRIND
171 int valgrind_id;
172#endif
173 unsigned char flags;
174} coro_cctx;
175
176enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181};
182
183/* this is a structure representing a perl-level coroutine */
23struct coro { 184struct coro {
24 /* the optional C context */ 185 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 186 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;
65 187
66 /* data associated with this coroutine (initial args) */ 188 /* data associated with this coroutine (initial args) */
67 AV *args; 189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204
205 /* statistics */
206 int usecount; /* number of transfers to this coro */
207
208 /* coro process data */
209 int prio;
210 //SV *throw;
211
212 /* async_pool */
213 SV *saved_deffh;
214
215 /* linked list */
216 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
68}; 218};
69 219
70typedef struct coro *Coro__State; 220typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 221typedef struct coro *Coro__State_or_hashref;
72 222
73static AV *main_mainstack; /* used to differentiate between $main and others */ 223/** Coro ********************************************************************/
74static HV *coro_state_stash;
75static HV *padlist_cache;
76 224
77/* mostly copied from op.c:cv_clone2 */ 225#define PRIO_MAX 3
78STATIC AV * 226#define PRIO_HIGH 1
79clone_padlist (AV *protopadlist) 227#define PRIO_NORMAL 0
228#define PRIO_LOW -1
229#define PRIO_IDLE -3
230#define PRIO_MIN -4
231
232/* for Coro.pm */
233static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
235static int coro_nready;
236static struct coro *coro_first;
237
238/** lowlevel stuff **********************************************************/
239
240static AV *
241coro_clone_padlist (pTHX_ CV *cv)
80{ 242{
81 AV *av; 243 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; 244 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);
99 245
100 newpadlist = newAV (); 246 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 247 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 248#if PERL_VERSION_ATLEAST (5,9,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist);
255
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 257 av_store (newpadlist, 1, (SV *)newpad);
104 258
105 av = newAV (); /* will be @_ */ 259 return newpadlist;
106 av_extend (av, 0); 260}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 261
110 for (ix = fpad; ix > 0; ix--) 262static void
263free_padlist (pTHX_ AV *padlist)
264{
265 /* may be during global destruction */
266 if (SvREFCNT (padlist))
111 { 267 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 268 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 269 while (i >= 0)
114 { 270 {
115 char *name = SvPVX (namesv); /* XXX */ 271 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 272 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 273 {
120 else
121 { /* our own lexical */
122 SV *sv; 274 SV *sv;
123 if (*name == '&') 275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 276 SvREFCNT_dec (sv);
125 else if (*name == '@') 277
126 sv = (SV *) newAV (); 278 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 } 279 }
135 } 280 }
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 }
147 281
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); 282 SvREFCNT_dec ((SV*)padlist);
188 } 283 }
189} 284}
190#endif 285
286static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{
289 AV *padlist;
290 AV *av = (AV *)mg->mg_obj;
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist);
295
296 SvREFCNT_dec (av);
297
298 return 0;
299}
300
301#define PERL_MAGIC_coro PERL_MAGIC_ext
302
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
304
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
191 337
192/* the next two functions merely cache the padlists */ 338/* the next two functions merely cache the padlists */
193STATIC void 339static void
194get_padlist (CV *cv) 340get_padlist (pTHX_ CV *cv)
195{ 341{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 342 MAGIC *mg = CORO_MAGIC (cv);
343 AV *av;
197 344
198 if (he && AvFILLp ((AV *)*he) >= 0) 345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 347 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 { 348 {
349#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */
351 CV *cp = Perl_cv_clone (cv);
352 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0;
211 SvREFCNT_dec (*he); 354 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 355#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
357#endif
213 } 358 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 359}
217 360
218#ifdef MAY_FLUSH 361static void
219STATIC void 362put_padlist (pTHX_ CV *cv)
220flush_padlist_cache ()
221{ 363{
222 HV *hv = padlist_cache; 364 MAGIC *mg = CORO_MAGIC (cv);
223 padlist_cache = newHV (); 365 AV *av;
224 366
225 if (hv_iterinit (hv)) 367 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 } 368 {
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
239 374
240 SvREFCNT_dec (hv); 375 av = (AV *)mg->mg_obj;
241}
242#endif
243 376
244#define SB do { 377 if (AvFILLp (av) >= AvMAX (av))
245#define SE } while (0) 378 av_extend (av, AvMAX (av) + 1);
246 379
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 381}
249 382
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 383/** load & save, init *******************************************************/
251 384
252static void 385static void
253load_state(pTHX_ Coro__State c) 386load_perl (pTHX_ Coro__State c)
254{ 387{
255 PL_dowarn = c->dowarn; 388#define VAR(name,type) PL_ ## name = c->name;
389# include "state.h"
390#undef VAR
256 391
257 PL_curstackinfo = c->curstackinfo; 392 GvSV (PL_defgv) = c->defsv;
258 PL_curstack = c->curstack; 393 GvAV (PL_defgv) = c->defav;
259 PL_mainstack = c->mainstack; 394 GvSV (PL_errgv) = c->errsv;
260 PL_stack_sp = c->stack_sp; 395 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);
288 396
289 { 397 {
290 dSP; 398 dSP;
291 CV *cv; 399 CV *cv;
292 400
293 /* now do the ugly restore mess */ 401 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 402 while ((cv = (CV *)POPs))
295 { 403 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 404 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 405 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 406 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 407 }
309 408
310 PUTBACK; 409 PUTBACK;
311 } 410 }
312} 411}
313 412
314static void 413static void
315save_state(pTHX_ Coro__State c, int flags) 414save_perl (pTHX_ Coro__State c)
316{ 415{
317 { 416 {
318 dSP; 417 dSP;
319 I32 cxix = cxstack_ix; 418 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 419 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 422 /*
324 * the worst thing you can imagine happens first - we have to save 423 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 424 * (and reinitialize) all cv's in the whole callchain :(
326 */ 425 */
327 426
328 PUSHs (Nullsv); 427 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 428 /* this loop was inspired by pp_caller */
330 for (;;) 429 for (;;)
331 { 430 {
332 do 431 while (cxix >= 0)
333 { 432 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 433 PERL_CONTEXT *cx = &ccstk[cxix--];
335 434
336 if (CxTYPE(cx) == CXt_SUB) 435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337 { 436 {
338 CV *cv = cx->blk_sub.cv; 437 CV *cv = cx->blk_sub.cv;
438
339 if (CvDEPTH(cv)) 439 if (CvDEPTH (cv))
340 { 440 {
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); 441 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)); 442 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 444 PUSHs ((SV *)cv);
357 445
358 get_padlist (cv); /* this is a monster */ 446 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv);
359 } 448 }
360 } 449 }
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 } 450 }
368 while (cxix >= 0);
369 451
370 if (top_si->si_type == PERLSI_MAIN) 452 if (top_si->si_type == PERLSI_MAIN)
371 break; 453 break;
372 454
373 top_si = top_si->si_prev; 455 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 456 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 457 cxix = top_si->si_cxix;
376 } 458 }
377 459
378 PUTBACK; 460 PUTBACK;
379 } 461 }
380 462
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 463 c->defav = GvAV (PL_defgv);
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 464 c->defsv = DEFSV;
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 465 c->errsv = ERRSV;
466 c->irssv_sv = GvSV (irsgv);
384 467
385 /* I have not the slightest idea of why av_reify is necessary */ 468#define VAR(name,type)c->name = PL_ ## name;
386 /* but if it's missing the defav contents magically get replaced sometimes */ 469# include "state.h"
387 if (c->defav) 470#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} 471}
420 472
421/* 473/*
422 * allocate various perl stacks. This is an exact copy 474 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 475 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 476 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 477 * not usually need a lot of stackspace.
426 */ 478 */
427STATIC void 479#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks
481#else
482static void
428coro_init_stacks (pTHX) 483coro_init_stacks (pTHX)
429{ 484{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 485 PL_curstackinfo = new_stackinfo(64, 6);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 486 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 487 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 489
435 PL_stack_base = AvARRAY(PL_curstack); 490 PL_stack_base = AvARRAY(PL_curstack);
… …
439 New(50,PL_tmps_stack,64,SV*); 494 New(50,PL_tmps_stack,64,SV*);
440 PL_tmps_floor = -1; 495 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 496 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 497 PL_tmps_max = 64;
443 498
444 New(54,PL_markstack,12,I32); 499 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 500 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 501 PL_markstack_max = PL_markstack + 16;
447 502
503#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 504 SET_MARK_OFFSET;
505#endif
449 506
450 New(54,PL_scopestack,12,I32); 507 New(54,PL_scopestack,16,I32);
451 PL_scopestack_ix = 0; 508 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 509 PL_scopestack_max = 16;
453 510
454 New(54,PL_savestack,64,ANY); 511 New(54,PL_savestack,64,ANY);
455 PL_savestack_ix = 0; 512 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 513 PL_savestack_max = 64;
457 514
515#if !PERL_VERSION_ATLEAST (5,9,0)
458 New(54,PL_retstack,8,OP*); 516 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 517 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 518 PL_retstack_max = 4;
519#endif
461} 520}
521#endif
462 522
463/* 523/*
464 * destroy the stacks, the callchain etc... 524 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 525 */
467STATIC void 526static void
468destroy_stacks(pTHX) 527coro_destroy_stacks (pTHX)
469{ 528{
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) 529 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 530 PL_curstackinfo = PL_curstackinfo->si_next;
480 531
481 while (PL_curstackinfo) 532 while (PL_curstackinfo)
482 { 533 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 534 PERL_SI *p = PL_curstackinfo->si_prev;
484 535
485 { 536 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); 537 SvREFCNT_dec (PL_curstackinfo->si_stack);
538
494 Safefree(PL_curstackinfo->si_cxstack); 539 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 540 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 541 PL_curstackinfo = p;
497 } 542 }
498 543
499 Safefree(PL_tmps_stack); 544 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 545 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 546 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
503 Safefree(PL_retstack); 549 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 550#endif
514 { 551}
515 /*FIXME*//*D*//* reasonable stack size! */ 552
516 ctx->ssize = 4096 * sizeof (long); 553static size_t
517 New (0, ctx->sptr, 4096, long); 554coro_rss (pTHX_ struct coro *coro)
555{
556 size_t rss = sizeof (*coro);
557
558 if (coro->mainstack)
518 } 559 {
519} 560 if (coro->flags & CF_RUNNING)
561 {
562 #define VAR(name,type)coro->name = PL_ ## name;
563 # include "state.h"
564 #undef VAR
565 }
520 566
521static void 567 rss += sizeof (coro->curstackinfo);
522deallocate_stack (Coro__State ctx) 568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
523{ 569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
524#ifdef HAVE_MMAP 570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
525 munmap (ctx->sptr, ctx->ssize); 571 rss += coro->tmps_max * sizeof (SV *);
526#else 572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
527 Safefree (ctx->sptr); 573 rss += coro->scopestack_max * sizeof (I32);
528#endif 574 rss += coro->savestack_max * sizeof (ANY);
529}
530 575
531/* might go away together with optional SAVE_CCTXT */ 576#if !PERL_VERSION_ATLEAST (5,9,0)
577 rss += coro->retstack_max * sizeof (OP *);
578#endif
579 }
580
581 return rss;
582}
583
584/** coroutine stack handling ************************************************/
585
532static void 586static void
533setup_coro (void *arg) 587coro_setup (pTHX_ struct coro *coro)
534{ 588{
535 /* 589 /*
536 * emulate part of the perl startup here. 590 * emulate part of the perl startup here.
537 */ 591 */
592 coro_init_stacks (aTHX);
593
594 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0;
598 PL_curpm = 0;
599 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0;
602
603 GvSV (PL_defgv) = NEWSV (0, 0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
607 PL_rs = newSVsv (GvSV (irsgv));
608
609 {
610 IO *io = newIO ();
611 PL_defoutgv = (GV *)NEWSV (0, 0);
612 gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 GvIOp (PL_defoutgv) = io;
617 }
618
619 {
620 dSP;
621 LOGOP myop;
622
623 Zero (&myop, 1, LOGOP);
624 myop.op_next = Nullop;
625 myop.op_flags = OPf_WANT_VOID;
626
627 PUSHMARK (SP);
628 XPUSHs (av_shift (GvAV (PL_defgv)));
629 PUTBACK;
630 PL_op = (OP *)&myop;
631 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
632 SPAGAIN;
633 }
634
635 ENTER; /* necessary e.g. for dounwind */
636}
637
638static void
639coro_destroy (pTHX_ struct coro *coro)
640{
641 if (!IN_DESTRUCT)
642 {
643 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0);
645 assert (PL_tmps_floor == -1);
646
647 /* free all temporaries */
648 FREETMPS;
649 assert (PL_tmps_ix == -1);
650
651 /* unwind all extra stacks */
652 POPSTACK_TO (PL_mainstack);
653
654 /* unwind main stack */
655 dounwind (-1);
656 }
657
658 SvREFCNT_dec (GvSV (PL_defgv));
659 SvREFCNT_dec (GvAV (PL_defgv));
660 SvREFCNT_dec (GvSV (PL_errgv));
661 SvREFCNT_dec (PL_defoutgv);
662 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv));
664
665 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw);
667
668 coro_destroy_stacks (aTHX);
669}
670
671static void
672free_coro_mortal (pTHX)
673{
674 if (coro_mortal)
675 {
676 SvREFCNT_dec (coro_mortal);
677 coro_mortal = 0;
678 }
679}
680
681static int
682runops_trace (pTHX)
683{
684 COP *oldcop = 0;
685 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx;
688
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 {
691 PERL_ASYNC_CHECK ();
692
693 if (cctx->flags & CC_TRACE_ALL)
694 {
695 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
696 {
697 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
698 SV **bot, **top;
699 AV *av = newAV (); /* return values */
700 SV **cb;
701 dSP;
702
703 GV *gv = CvGV (cx->blk_sub.cv);
704 SV *fullname = sv_2mortal (newSV (0));
705 if (isGV (gv))
706 gv_efullname3 (fullname, gv, 0);
707
708 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot;
712
713 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++));
715
716 PL_runops = RUNOPS_DEFAULT;
717 ENTER;
718 SAVETMPS;
719 EXTEND (SP, 3);
720 PUSHMARK (SP);
721 PUSHs (&PL_sv_no);
722 PUSHs (fullname);
723 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
724 PUTBACK;
725 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
726 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
727 SPAGAIN;
728 FREETMPS;
729 LEAVE;
730 PL_runops = runops_trace;
731 }
732
733 if (oldcop != PL_curcop)
734 {
735 oldcop = PL_curcop;
736
737 if (PL_curcop != &PL_compiling)
738 {
739 SV **cb;
740
741 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
742 {
743 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744
745 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
746 {
747 runops_proc_t old_runops = PL_runops;
748 dSP;
749 GV *gv = CvGV (cx->blk_sub.cv);
750 SV *fullname = sv_2mortal (newSV (0));
751
752 if (isGV (gv))
753 gv_efullname3 (fullname, gv, 0);
754
755 PL_runops = RUNOPS_DEFAULT;
756 ENTER;
757 SAVETMPS;
758 EXTEND (SP, 3);
759 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes);
761 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
765 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN;
767 FREETMPS;
768 LEAVE;
769 PL_runops = runops_trace;
770 }
771
772 oldcxix = cxstack_ix;
773 }
774
775 if (cctx->flags & CC_TRACE_LINE)
776 {
777 dSP;
778
779 PL_runops = RUNOPS_DEFAULT;
780 ENTER;
781 SAVETMPS;
782 EXTEND (SP, 3);
783 PL_runops = RUNOPS_DEFAULT;
784 PUSHMARK (SP);
785 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
786 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
787 PUTBACK;
788 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
789 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
790 SPAGAIN;
791 FREETMPS;
792 LEAVE;
793 PL_runops = runops_trace;
794 }
795 }
796 }
797 }
798 }
799
800 TAINT_NOT;
801 return 0;
802}
803
804/* inject a fake call to Coro::State::_cctx_init into the execution */
805/* _cctx_init should be careful, as it could be called at almost any time */
806/* during execution of a perl program */
807static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx)
809{
538 dSP; 810 dSP;
539 Coro__State ctx = (Coro__State)arg; 811 LOGOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 812
542 coro_init_stacks (aTHX); 813 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 814
815 if (cctx->flags & CC_TRACE)
816 PL_runops = runops_trace;
817
818 Zero (&myop, 1, LOGOP);
819 myop.op_next = PL_op;
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
821
822 PUSHMARK (SP);
823 EXTEND (SP, 2);
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
826 PUTBACK;
827 PL_op = (OP *)&myop;
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 829 SPAGAIN;
830}
545 831
546 /*PL_curcop = 0;*/ 832/*
547 SvREFCNT_dec (GvAV (PL_defgv)); 833 * this is a _very_ stripped down perl interpreter ;)
548 GvAV (PL_defgv) = ctx->args; 834 */
835static void
836coro_run (void *arg)
837{
838 dTHX;
549 839
550 if (ctx->sptr) 840 /* coro_run is the alternative tail of transfer(), so unlock here. */
841 UNLOCK;
842
843 /* we now skip the entersub that lead to transfer() */
844 PL_op = PL_op->op_next;
845
846 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg);
848
849 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op;
851 perl_run (PL_curinterp);
852
853 /*
854 * If perl-run returns we assume exit() was being called or the coro
855 * fell off the end, which seems to be the only valid (non-bug)
856 * reason for perl_run to return. We try to exit by jumping to the
857 * bootstrap-time "top" top_env, as we cannot restore the "main"
858 * coroutine as Coro has no such concept
859 */
860 PL_top_env = main_top_env;
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
862}
863
864static coro_cctx *
865cctx_new ()
866{
867 coro_cctx *cctx;
868 void *stack_start;
869 size_t stack_size;
870
871 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx);
874
875#if HAVE_MMAP
876
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
878 /* mmap supposedly does allocate-on-write for us */
879 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880
881 if (cctx->sptr != (void *)-1)
551 { 882 {
552 PUSHMARK(SP); 883# if CORO_STACKGUARD
553 PUTBACK; 884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 885# endif
555 croak ("FATAL: CCTXT coroutine returned!"); 886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
888 cctx->flags |= CC_MAPPED;
556 } 889 }
557 else 890 else
558 { 891#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 } 892 {
582} 893 cctx->ssize = coro_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long);
583 895
584STATIC void 896 if (!cctx->sptr)
897 {
898 perror ("FATAL: unable to allocate stack for coroutine");
899 _exit (EXIT_FAILURE);
900 }
901
902 stack_start = cctx->sptr;
903 stack_size = cctx->ssize;
904 }
905
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
908
909 return cctx;
910}
911
912static void
913cctx_destroy (coro_cctx *cctx)
914{
915 if (!cctx)
916 return;
917
918 --cctx_count;
919
920#if CORO_USE_VALGRIND
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
922#endif
923
924#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize);
927 else
928#endif
929 Safefree (cctx->sptr);
930
931 Safefree (cctx);
932}
933
934static coro_cctx *
935cctx_get (pTHX)
936{
937 while (cctx_first)
938 {
939 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next;
941 --cctx_idle;
942
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
944 return cctx;
945
946 cctx_destroy (cctx);
947 }
948
949 return cctx_new ();
950}
951
952static void
953cctx_put (coro_cctx *cctx)
954{
955 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX)
957 {
958 coro_cctx *first = cctx_first;
959 cctx_first = first->next;
960 --cctx_idle;
961
962 cctx_destroy (first);
963 }
964
965 ++cctx_idle;
966 cctx->next = cctx_first;
967 cctx_first = cctx;
968}
969
970/** coroutine switching *****************************************************/
971
972static void NOINLINE
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 973transfer_check (pTHX_ struct coro *prev, struct coro *next)
586{ 974{
587 dSP;
588
589 if (prev != next) 975 if (prev != next)
590 { 976 {
591 /* 977 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
592 * this could be done in newprocess which would lead to 978 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) 979
594 * code here, but lazy allocation of stacks has also 980 if (next->flags & CF_RUNNING)
595 * some virtues and the overhead of the if() is nil. 981 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
596 */ 982
597 if (next->mainstack) 983 if (next->flags & CF_DESTROYED)
984 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
985
986 if (PL_lex_state != LEX_NOTPARSING)
987 croak ("Coro::State::transfer called while parsing, but this is not supported");
988 }
989}
990
991/* always use the TRANSFER macro */
992static void NOINLINE
993transfer (pTHX_ struct coro *prev, struct coro *next)
994{
995 dSTACKLEVEL;
996
997 /* sometimes transfer is only called to set idle_sp */
998 if (!next)
999 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1001 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 }
1003 else if (prev != next)
1004 {
1005 coro_cctx *prev__cctx;
1006
1007 if (prev->flags & CF_NEW)
598 { 1008 {
599 SAVE (prev, flags); 1009 /* create a new empty context */
600 LOAD (next); 1010 Newz (0, prev->cctx, 1, coro_cctx);
601 1011 prev->flags &= ~CF_NEW;
602 /* mark this state as in-use */ 1012 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 } 1013 }
618 else if (next->tmps_ix == -2) 1014
619 croak ("tried to transfer to running coroutine"); 1015 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING;
1017
1018 LOCK;
1019
1020 if (next->flags & CF_NEW)
1021 {
1022 /* need to start coroutine */
1023 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */
1027 coro_setup (aTHX_ next);
1028 }
620 else 1029 else
621 { 1030 {
622 SAVE (prev, -1); /* first get rid of the old state */ 1031 /* coroutine already started */
623 1032 save_perl (aTHX_ prev);
624 if (flags & TRANSFER_SAVE_CCTXT) 1033 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 } 1034 }
1035
1036 prev__cctx = prev->cctx;
1037
1038 /* possibly "free" the cctx */
1039 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1040 {
1041 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1042 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1043
1044 prev->cctx = 0;
1045
1046 cctx_put (prev__cctx);
1047 }
1048
1049 ++next->usecount;
1050
1051 if (!next->cctx)
1052 next->cctx = cctx_get (aTHX);
1053
1054 if (prev__cctx != next->cctx)
1055 {
1056 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 }
1060
1061 free_coro_mortal (aTHX);
1062 UNLOCK;
1063 }
1064}
1065
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1072#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073
1074/** high level stuff ********************************************************/
1075
1076static int
1077coro_state_destroy (pTHX_ struct coro *coro)
1078{
1079 if (coro->flags & CF_DESTROYED)
1080 return 0;
1081
1082 coro->flags |= CF_DESTROYED;
1083
1084 if (coro->flags & CF_READY)
642 } 1085 {
643} 1086 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready;
1090 UNLOCK;
1091 }
1092 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
644 1094
1095 if (coro->mainstack && coro->mainstack != main_mainstack)
1096 {
1097 struct coro temp;
1098
1099 if (coro->flags & CF_RUNNING)
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101
1102 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro);
1104
1105 coro_destroy (aTHX_ coro);
1106
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1108
1109 coro->mainstack = 0;
1110 }
1111
1112 cctx_destroy (coro->cctx);
1113 SvREFCNT_dec (coro->args);
1114
1115 if (coro->next) coro->next->prev = coro->prev;
1116 if (coro->prev) coro->prev->next = coro->next;
1117 if (coro == coro_first) coro_first = coro->next;
1118
1119 return 1;
1120}
1121
1122static int
1123coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1124{
1125 struct coro *coro = (struct coro *)mg->mg_ptr;
1126 mg->mg_ptr = 0;
1127
1128 coro->hv = 0;
1129
1130 if (--coro->refcnt < 0)
1131 {
1132 coro_state_destroy (aTHX_ coro);
1133 Safefree (coro);
1134 }
1135
1136 return 0;
1137}
1138
1139static int
1140coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1141{
1142 struct coro *coro = (struct coro *)mg->mg_ptr;
1143
1144 ++coro->refcnt;
1145
1146 return 0;
1147}
1148
1149static MGVTBL coro_state_vtbl = {
1150 0, 0, 0, 0,
1151 coro_state_free,
1152 0,
1153#ifdef MGf_DUP
1154 coro_state_dup,
1155#else
1156# define MGf_DUP 0
1157#endif
1158};
1159
1160static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{
1163 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta);
1166}
1167
1168static void
1169api_transfer (SV *prev_sv, SV *next_sv)
1170{
1171 dTHX;
1172 struct transfer_args ta;
1173
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1175 TRANSFER (ta);
1176}
1177
1178/** Coro ********************************************************************/
1179
1180static void
1181coro_enq (pTHX_ SV *coro_sv)
1182{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1184}
1185
1186static SV *
1187coro_deq (pTHX_ int min_prio)
1188{
1189 int prio = PRIO_MAX - PRIO_MIN;
1190
1191 min_prio -= PRIO_MIN;
1192 if (min_prio < 0)
1193 min_prio = 0;
1194
1195 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1196 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]);
1198
1199 return 0;
1200}
1201
1202static int
1203api_ready (SV *coro_sv)
1204{
1205 dTHX;
1206 struct coro *coro;
1207
1208 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv);
1210
1211 coro = SvSTATE (coro_sv);
1212
1213 if (coro->flags & CF_READY)
1214 return 0;
1215
1216 coro->flags |= CF_READY;
1217
1218 LOCK;
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1220 ++coro_nready;
1221 UNLOCK;
1222
1223 return 1;
1224}
1225
1226static int
1227api_is_ready (SV *coro_sv)
1228{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231}
1232
1233static void
1234prepare_schedule (pTHX_ struct transfer_args *ta)
1235{
1236 SV *prev_sv, *next_sv;
1237
1238 for (;;)
1239 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN);
1242
1243 /* nothing to schedule: call the idle handler */
1244 if (!next_sv)
1245 {
1246 dSP;
1247 UNLOCK;
1248
1249 ENTER;
1250 SAVETMPS;
1251
1252 PUSHMARK (SP);
1253 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1255
1256 FREETMPS;
1257 LEAVE;
1258 continue;
1259 }
1260
1261 ta->next = SvSTATE (next_sv);
1262
1263 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED)
1265 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */
1269 continue;
1270 }
1271
1272 --coro_nready;
1273 UNLOCK;
1274 break;
1275 }
1276
1277 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current);
1279 ta->prev = SvSTATE (prev_sv);
1280 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY);
1282 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv);
1284
1285 LOCK;
1286 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv;
1288 UNLOCK;
1289}
1290
1291static void
1292prepare_cede (pTHX_ struct transfer_args *ta)
1293{
1294 api_ready (coro_current);
1295 prepare_schedule (aTHX_ ta);
1296}
1297
1298static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta)
1300{
1301 if (coro_nready)
1302 {
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta);
1305 api_ready (prev);
1306 return 1;
1307 }
1308 else
1309 return 0;
1310}
1311
1312static void
1313api_schedule (void)
1314{
1315 dTHX;
1316 struct transfer_args ta;
1317
1318 prepare_schedule (aTHX_ &ta);
1319 TRANSFER (ta);
1320}
1321
1322static int
1323api_cede (void)
1324{
1325 dTHX;
1326 struct transfer_args ta;
1327
1328 prepare_cede (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta);
1333 return 1;
1334 }
1335 else
1336 return 0;
1337}
1338
1339static int
1340api_cede_notself (void)
1341{
1342 dTHX;
1343 struct transfer_args ta;
1344
1345 if (prepare_cede_notself (aTHX_ &ta))
1346 {
1347 TRANSFER (ta);
1348 return 1;
1349 }
1350 else
1351 return 0;
1352}
1353
1354static void
1355api_trace (SV *coro_sv, int flags)
1356{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv);
1359
1360 if (flags & CC_TRACE)
1361 {
1362 if (!coro->cctx)
1363 coro->cctx = cctx_new ();
1364 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack");
1366
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372
1373 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT;
1375 else
1376 coro->runops = RUNOPS_DEFAULT;
1377 }
1378}
1379
645MODULE = Coro::State PACKAGE = Coro::State 1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
646 1381
647PROTOTYPES: ENABLE 1382PROTOTYPES: DISABLE
648 1383
649BOOT: 1384BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */ 1385{
1386#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex);
1388#endif
1389 BOOT_PAGESIZE;
1390
1391 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1392
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE); 1393 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652 1394
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1395 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1396 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1397 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1398 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660 1399
661 main_mainstack = PL_mainstack; 1400 main_mainstack = PL_mainstack;
662} 1401 main_top_env = PL_top_env;
663 1402
664Coro::State 1403 while (main_top_env->je_prev)
665_newprocess(args) 1404 main_top_env = main_top_env->je_prev;
666 SV * args 1405
667 PROTOTYPE: $ 1406 coroapi.ver = CORO_API_VERSION;
1407 coroapi.transfer = api_transfer;
1408
1409 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1410}
1411
1412SV *
1413new (char *klass, ...)
668 CODE: 1414 CODE:
669 Coro__State coro; 1415{
1416 struct coro *coro;
1417 HV *hv;
1418 int i;
670 1419
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); 1420 Newz (0, coro, 1, struct coro);
1421 coro->args = newAV ();
1422 coro->flags = CF_NEW;
675 1423
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1424 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1425 coro->next = coro_first;
678 coro->sptr = 0; 1426 coro_first = coro;
679 coro->ssize = 0;
680 1427
681 RETVAL = coro; 1428 coro->hv = hv = newHV ();
1429 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1430 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1431
1432 for (i = 1; i < items; i++)
1433 av_push (coro->args, newSVsv (ST (i)));
1434}
682 OUTPUT: 1435 OUTPUT:
683 RETVAL 1436 RETVAL
684 1437
1438# these not obviously related functions are all rolled into the same xs
1439# function to increase chances that they all will call transfer with the same
1440# stack offset
685void 1441void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1442_set_stacklevel (...)
687 Coro::State_or_hashref prev 1443 ALIAS:
688 Coro::State_or_hashref next 1444 Coro::State::transfer = 1
689 int flags 1445 Coro::schedule = 2
690 PROTOTYPE: @ 1446 Coro::cede = 3
1447 Coro::cede_notself = 4
691 CODE: 1448 CODE:
692 transfer (aTHX_ prev, next, flags); 1449{
1450 struct transfer_args ta;
1451
1452 switch (ix)
1453 {
1454 case 0:
1455 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1456 ta.next = 0;
1457 break;
1458
1459 case 1:
1460 if (items != 2)
1461 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1462
1463 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1464 break;
1465
1466 case 2:
1467 prepare_schedule (aTHX_ &ta);
1468 break;
1469
1470 case 3:
1471 prepare_cede (aTHX_ &ta);
1472 break;
1473
1474 case 4:
1475 if (!prepare_cede_notself (aTHX_ &ta))
1476 XSRETURN_EMPTY;
1477
1478 break;
1479 }
1480
1481 BARRIER;
1482 TRANSFER (ta);
1483
1484 if (GIMME_V != G_VOID && ta.next != ta.prev)
1485 XSRETURN_YES;
1486}
1487
1488bool
1489_destroy (SV *coro_sv)
1490 CODE:
1491 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1492 OUTPUT:
1493 RETVAL
693 1494
694void 1495void
695DESTROY(coro) 1496_exit (code)
696 Coro::State coro 1497 int code
697 CODE: 1498 PROTOTYPE: $
1499 CODE:
1500 _exit (code);
698 1501
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1502int
1503cctx_stacksize (int new_stacksize = 0)
1504 CODE:
1505 RETVAL = coro_stacksize;
1506 if (new_stacksize)
1507 coro_stacksize = new_stacksize;
1508 OUTPUT:
1509 RETVAL
1510
1511int
1512cctx_count ()
1513 CODE:
1514 RETVAL = cctx_count;
1515 OUTPUT:
1516 RETVAL
1517
1518int
1519cctx_idle ()
1520 CODE:
1521 RETVAL = cctx_idle;
1522 OUTPUT:
1523 RETVAL
1524
1525void
1526list ()
1527 PPCODE:
1528{
1529 struct coro *coro;
1530 for (coro = coro_first; coro; coro = coro->next)
1531 if (coro->hv)
1532 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1533}
1534
1535void
1536call (Coro::State coro, SV *coderef)
1537 ALIAS:
1538 eval = 1
1539 CODE:
1540{
1541 if (coro->mainstack)
700 { 1542 {
701 struct coro temp; 1543 struct coro temp;
1544 Zero (&temp, 1, struct coro);
702 1545
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1546 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 1547 {
1548 save_perl (aTHX_ &temp);
1549 load_perl (aTHX_ coro);
1550 }
705 1551
706 destroy_stacks (aTHX); 1552 {
1553 dSP;
1554 ENTER;
1555 SAVETMPS;
1556 PUSHMARK (SP);
1557 PUTBACK;
1558 if (ix)
1559 eval_sv (coderef, 0);
1560 else
1561 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1562 SPAGAIN;
1563 FREETMPS;
1564 LEAVE;
1565 PUTBACK;
1566 }
707 1567
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1568 if (!(coro->flags & CF_RUNNING))
709 1569 {
710 coro->mainstack = 0; 1570 save_perl (aTHX_ coro);
1571 load_perl (aTHX_ &temp);
1572 }
711 } 1573 }
1574}
712 1575
713 if (coro->sptr) 1576SV *
1577is_ready (Coro::State coro)
1578 PROTOTYPE: $
1579 ALIAS:
1580 is_ready = CF_READY
1581 is_running = CF_RUNNING
1582 is_new = CF_NEW
1583 is_destroyed = CF_DESTROYED
1584 CODE:
1585 RETVAL = boolSV (coro->flags & ix);
1586 OUTPUT:
1587 RETVAL
1588
1589void
1590api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1591
1592SV *
1593has_stack (Coro::State coro)
1594 PROTOTYPE: $
1595 CODE:
1596 RETVAL = boolSV (!!coro->cctx);
1597 OUTPUT:
1598 RETVAL
1599
1600int
1601is_traced (Coro::State coro)
1602 PROTOTYPE: $
1603 CODE:
1604 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1605 OUTPUT:
1606 RETVAL
1607
1608IV
1609rss (Coro::State coro)
1610 PROTOTYPE: $
1611 ALIAS:
1612 usecount = 1
1613 CODE:
1614 switch (ix)
1615 {
1616 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1617 case 1: RETVAL = coro->usecount; break;
1618 }
1619 OUTPUT:
1620 RETVAL
1621
1622
1623MODULE = Coro::State PACKAGE = Coro
1624
1625BOOT:
1626{
1627 int i;
1628
1629 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1630 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1631 av_async_pool = get_av ("Coro::async_pool", TRUE);
1632
1633 coro_current = get_sv ("Coro::current", FALSE);
1634 SvREADONLY_on (coro_current);
1635
1636 coro_stash = gv_stashpv ("Coro", TRUE);
1637
1638 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1639 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1640 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1641 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1642 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1643 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1644
1645 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1646 coro_ready[i] = newAV ();
1647
1648 {
1649 SV *sv = perl_get_sv("Coro::API", 1);
1650
1651 coroapi.schedule = api_schedule;
1652 coroapi.cede = api_cede;
1653 coroapi.cede_notself = api_cede_notself;
1654 coroapi.ready = api_ready;
1655 coroapi.is_ready = api_is_ready;
1656 coroapi.nready = &coro_nready;
1657 coroapi.current = coro_current;
1658
1659 GCoroAPI = &coroapi;
1660 sv_setiv (sv, (IV)&coroapi);
1661 SvREADONLY_on (sv);
1662 }
1663}
1664
1665void
1666_set_current (SV *current)
1667 PROTOTYPE: $
1668 CODE:
1669 SvREFCNT_dec (SvRV (coro_current));
1670 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1671
1672int
1673prio (Coro::State coro, int newprio = 0)
1674 ALIAS:
1675 nice = 1
1676 CODE:
1677{
1678 RETVAL = coro->prio;
1679
1680 if (items > 1)
714 { 1681 {
715 deallocate_stack (coro); 1682 if (ix)
1683 newprio = coro->prio - newprio;
1684
1685 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1686 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1687
716 coro->sptr = 0; 1688 coro->prio = newprio;
717 } 1689 }
1690}
1691 OUTPUT:
1692 RETVAL
718 1693
719 Safefree (coro); 1694SV *
1695ready (SV *self)
1696 PROTOTYPE: $
1697 CODE:
1698 RETVAL = boolSV (api_ready (self));
1699 OUTPUT:
1700 RETVAL
720 1701
1702int
1703nready (...)
1704 PROTOTYPE:
1705 CODE:
1706 RETVAL = coro_nready;
1707 OUTPUT:
1708 RETVAL
1709
1710# for async_pool speedup
721void 1711void
722flush() 1712_pool_1 (SV *cb)
723 CODE: 1713 CODE:
724#ifdef MAY_FLUSH 1714{
725 flush_padlist_cache (); 1715 struct coro *coro = SvSTATE (coro_current);
726#endif 1716 HV *hv = (HV *)SvRV (coro_current);
1717 AV *defav = GvAV (PL_defgv);
1718 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1719 AV *invoke_av;
1720 int i, len;
727 1721
728MODULE = Coro::State PACKAGE = Coro::Cont 1722 if (!invoke)
1723 croak ("\3terminate\2\n");
729 1724
730# this is slightly dirty 1725 SvREFCNT_dec (coro->saved_deffh);
1726 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1727
1728 hv_store (hv, "desc", sizeof ("desc") - 1,
1729 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1730
1731 invoke_av = (AV *)SvRV (invoke);
1732 len = av_len (invoke_av);
1733
1734 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1735
1736 if (len > 0)
1737 {
1738 av_fill (defav, len - 1);
1739 for (i = 0; i < len; ++i)
1740 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1741 }
1742
1743 SvREFCNT_dec (invoke);
1744}
731 1745
732void 1746void
733yield(...) 1747_pool_2 (SV *cb)
1748 CODE:
1749{
1750 struct coro *coro = SvSTATE (coro_current);
1751
1752 sv_setsv (cb, &PL_sv_undef);
1753
1754 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1755 coro->saved_deffh = 0;
1756
1757 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1758 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1759 croak ("\3terminate\2\n");
1760
1761 av_clear (GvAV (PL_defgv));
1762 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1763 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1764
1765 coro->prio = 0;
1766
1767 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1768 api_trace (coro_current, 0);
1769
1770 av_push (av_async_pool, newSVsv (coro_current));
1771}
1772
1773
1774MODULE = Coro::State PACKAGE = Coro::AIO
1775
1776SV *
1777_get_state ()
1778 CODE:
1779{
1780 struct io_state *data;
1781
1782 RETVAL = newSV (sizeof (struct io_state));
1783 data = (struct io_state *)SvPVX (RETVAL);
1784 SvCUR_set (RETVAL, sizeof (struct io_state));
1785 SvPOK_only (RETVAL);
1786
1787 data->errorno = errno;
1788 data->laststype = PL_laststype;
1789 data->laststatval = PL_laststatval;
1790 data->statcache = PL_statcache;
1791}
1792 OUTPUT:
1793 RETVAL
1794
1795void
1796_set_state (char *data_)
734 PROTOTYPE: @ 1797 PROTOTYPE: $
735 CODE: 1798 CODE:
736 static SV *returnstk; 1799{
737 SV *sv; 1800 struct io_state *data = (void *)data_;
738 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next;
740 1801
741 if (!returnstk) 1802 errno = data->errorno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1803 PL_laststype = data->laststype;
1804 PL_laststatval = data->laststatval;
1805 PL_statcache = data->statcache;
1806}
743 1807
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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