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Comparing Coro/Coro/State.xs (file contents):
Revision 1.20 by root, Fri Aug 3 12:51:56 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"
6 10
7#include <signal.h> 11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
8 14
9#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
10# include <unistd.h> 16# include <unistd.h>
11# include <sys/mman.h> 17# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 18# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
15# else 21# else
16# undef HAVE_MMAP 22# undef HAVE_MMAP
17# endif 23# endif
18# 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
19#endif 32# endif
20
21#define MAY_FLUSH /* increases codesize */
22
23/* perl-related */
24#define TRANSFER_SAVE_DEFAV 0x00000001
25#define TRANSFER_SAVE_DEFSV 0x00000002
26#define TRANSFER_SAVE_ERRSV 0x00000004
27/* c-related */
28#define TRANSFER_SAVE_CCTXT 0x00000008
29#ifdef CORO_LAZY_STACK
30# define TRANSFER_LAZY_STACK 0x00000010
31#else 33#else
32# define TRANSFER_LAZY_STACK 0x00000000 34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
37
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
44
45/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
33#endif 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
34 74
35#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 75/* 5.8.7 */
36 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
37 79
38#define SUB_INIT "Coro::State::initialize" 80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
39#define UCORO_STATE "_coro_state" 81# undef CORO_STACKGUARD
82#endif
40 83
41/* The next macro should delcare a variable stacklevel that contains and approximation 84#ifndef CORO_STACKGUARD
42 * to the current C stack pointer. It's property is that it changes with each call 85# define CORO_STACKGUARD 0
43 * and should be unique. */ 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
44#define dSTACKLEVEL void *stacklevel = &stacklevel 96#define STACKLEVEL ((void *)&stacklevel)
45 97
46#define labs(l) ((l) >= 0 ? (l) : -(l)) 98#define IN_DESTRUCT (PL_main_cv == Nullcv)
47 99
48/* this is actually not only the c stack but also c registers etc... */ 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 */
49typedef struct { 157typedef struct coro_cctx {
50 int refcnt; /* pointer reference counter */ 158 struct coro_cctx *next;
51 int usecnt; /* shared by how many coroutines */
52 int gencnt; /* generation counter */
53 159
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;
54 coro_context cctx; 168 coro_context cctx;
55 169
56 void *sptr; 170#if CORO_USE_VALGRIND
57 long ssize; /* positive == mmap, otherwise malloc */ 171 int valgrind_id;
58} coro_stack; 172#endif
173 unsigned char flags;
174} coro_cctx;
59 175
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 */
60struct coro { 184struct coro {
61 /* the optional C context */ 185 /* the c coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 186 coro_cctx *cctx;
63 void *cursp;
64 int gencnt;
65
66 /* optionally saved, might be zero */
67 AV *defav;
68 SV *defsv;
69 SV *errsv;
70
71 /* saved global state not related to stacks */
72 U8 dowarn;
73 I32 in_eval;
74
75 /* the stacks and related info (callchain etc..) */
76 PERL_SI *curstackinfo;
77 AV *curstack;
78 AV *mainstack;
79 SV **stack_sp;
80 OP *op;
81 SV **curpad;
82 SV **stack_base;
83 SV **stack_max;
84 SV **tmps_stack;
85 I32 tmps_floor;
86 I32 tmps_ix;
87 I32 tmps_max;
88 I32 *markstack;
89 I32 *markstack_ptr;
90 I32 *markstack_max;
91 I32 *scopestack;
92 I32 scopestack_ix;
93 I32 scopestack_max;
94 ANY *savestack;
95 I32 savestack_ix;
96 I32 savestack_max;
97 OP **retstack;
98 I32 retstack_ix;
99 I32 retstack_max;
100 COP *curcop;
101 JMPENV *top_env;
102 187
103 /* data associated with this coroutine (initial args) */ 188 /* data associated with this coroutine (initial args) */
104 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 */
105}; 218};
106 219
107typedef struct coro *Coro__State; 220typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 221typedef struct coro *Coro__State_or_hashref;
109 222
110static AV *main_mainstack; /* used to differentiate between $main and others */ 223/** Coro ********************************************************************/
111static HV *coro_state_stash;
112static SV *ucoro_state_sv;
113static U32 ucoro_state_hash;
114static HV *padlist_cache;
115 224
116/* mostly copied from op.c:cv_clone2 */ 225#define PRIO_MAX 3
117STATIC AV * 226#define PRIO_HIGH 1
118clone_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)
119{ 242{
120 AV *av; 243 AV *padlist = CvPADLIST (cv);
121 I32 ix;
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
124 SV **pname = AvARRAY (protopad_name);
125 SV **ppad = AvARRAY (protopad);
126 I32 fname = AvFILLp (protopad_name);
127 I32 fpad = AvFILLp (protopad);
128 AV *newpadlist, *newpad_name, *newpad; 244 AV *newpadlist, *newpad;
129 SV **npad;
130
131 newpad_name = newAV ();
132 for (ix = fname; ix >= 0; ix--)
133 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135 newpad = newAV ();
136 av_fill (newpad, AvFILLp (protopad));
137 npad = AvARRAY (newpad);
138 245
139 newpadlist = newAV (); 246 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 247 AvREAL_off (newpadlist);
141 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)));
142 av_store (newpadlist, 1, (SV *) newpad); 257 av_store (newpadlist, 1, (SV *)newpad);
143 258
144 av = newAV (); /* will be @_ */ 259 return newpadlist;
145 av_extend (av, 0); 260}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 261
149 for (ix = fpad; ix > 0; ix--) 262static void
263free_padlist (pTHX_ AV *padlist)
264{
265 /* may be during global destruction */
266 if (SvREFCNT (padlist))
150 { 267 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 268 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 269 while (i >= 0)
153 { 270 {
154 char *name = SvPVX (namesv); /* XXX */ 271 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 272 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 273 {
159 else
160 { /* our own lexical */
161 SV *sv; 274 SV *sv;
162 if (*name == '&') 275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 276 SvREFCNT_dec (sv);
164 else if (*name == '@') 277
165 sv = (SV *) newAV (); 278 SvREFCNT_dec (*svp);
166 else if (*name == '%')
167 sv = (SV *) newHV ();
168 else
169 sv = NEWSV (0, 0);
170 if (!SvPADBUSY (sv))
171 SvPADMY_on (sv);
172 npad[ix] = sv;
173 } 279 }
174 } 280 }
175 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
176 {
177 npad[ix] = SvREFCNT_inc (ppad[ix]);
178 }
179 else
180 {
181 SV *sv = NEWSV (0, 0);
182 SvPADTMP_on (sv);
183 npad[ix] = sv;
184 }
185 }
186 281
187#if 0 /* return -ENOTUNDERSTOOD */
188 /* Now that vars are all in place, clone nested closures. */
189
190 for (ix = fpad; ix > 0; ix--) {
191 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192 if (namesv
193 && namesv != &PL_sv_undef
194 && !(SvFLAGS(namesv) & SVf_FAKE)
195 && *SvPVX(namesv) == '&'
196 && CvCLONE(ppad[ix]))
197 {
198 CV *kid = cv_clone((CV*)ppad[ix]);
199 SvREFCNT_dec(ppad[ix]);
200 CvCLONE_on(kid);
201 SvPADMY_on(kid);
202 npad[ix] = (SV*)kid;
203 }
204 }
205#endif
206
207 return newpadlist;
208}
209
210#ifdef MAY_FLUSH
211STATIC AV *
212free_padlist (AV *padlist)
213{
214 /* may be during global destruction */
215 if (SvREFCNT(padlist))
216 {
217 I32 i = AvFILLp(padlist);
218 while (i >= 0)
219 {
220 SV **svp = av_fetch(padlist, i--, FALSE);
221 SV *sv = svp ? *svp : Nullsv;
222 if (sv)
223 SvREFCNT_dec(sv);
224 }
225
226 SvREFCNT_dec((SV*)padlist); 282 SvREFCNT_dec ((SV*)padlist);
227 } 283 }
228} 284}
229#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))
230 337
231/* the next two functions merely cache the padlists */ 338/* the next two functions merely cache the padlists */
232STATIC void 339static void
233get_padlist (CV *cv) 340get_padlist (pTHX_ CV *cv)
234{ 341{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 342 MAGIC *mg = CORO_MAGIC (cv);
343 AV *av;
236 344
237 if (he && AvFILLp ((AV *)*he) >= 0) 345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239 else 347 else
240 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241}
242
243STATIC void
244put_padlist (CV *cv)
245{
246 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248 if (SvTYPE (*he) != SVt_PVAV)
249 { 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;
250 SvREFCNT_dec (*he); 354 SvREFCNT_dec (cp);
251 *he = (SV *)newAV (); 355#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
357#endif
252 } 358 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 359}
256 360
257#ifdef MAY_FLUSH 361static void
258STATIC void 362put_padlist (pTHX_ CV *cv)
259flush_padlist_cache ()
260{ 363{
261 HV *hv = padlist_cache; 364 MAGIC *mg = CORO_MAGIC (cv);
262 padlist_cache = newHV (); 365 AV *av;
263 366
264 if (hv_iterinit (hv)) 367 if (!mg)
265 {
266 HE *he;
267 AV *padlist;
268
269 while (!!(he = hv_iternext (hv)))
270 {
271 AV *av = (AV *)HeVAL(he);
272
273 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (padlist);
276 }
277 } 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 }
278 374
279 SvREFCNT_dec (hv); 375 av = (AV *)mg->mg_obj;
280}
281#endif
282 376
283#define SB do { 377 if (AvFILLp (av) >= AvMAX (av))
284#define SE } while (0) 378 av_extend (av, AvMAX (av) + 1);
285 379
286#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
287#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 381}
288 382
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 383/** load & save, init *******************************************************/
290 384
291static void 385static void
292load_state(pTHX_ Coro__State c) 386load_perl (pTHX_ Coro__State c)
293{ 387{
294 PL_dowarn = c->dowarn; 388#define VAR(name,type) PL_ ## name = c->name;
295 PL_in_eval = c->in_eval; 389# include "state.h"
390#undef VAR
296 391
297 PL_curstackinfo = c->curstackinfo; 392 GvSV (PL_defgv) = c->defsv;
298 PL_curstack = c->curstack; 393 GvAV (PL_defgv) = c->defav;
299 PL_mainstack = c->mainstack; 394 GvSV (PL_errgv) = c->errsv;
300 PL_stack_sp = c->stack_sp; 395 GvSV (irsgv) = c->irssv_sv;
301 PL_op = c->op;
302 PL_curpad = c->curpad;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318 PL_retstack = c->retstack;
319 PL_retstack_ix = c->retstack_ix;
320 PL_retstack_max = c->retstack_max;
321 PL_curcop = c->curcop;
322 PL_top_env = c->top_env;
323
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
327 396
328 { 397 {
329 dSP; 398 dSP;
330 CV *cv; 399 CV *cv;
331 400
332 /* now do the ugly restore mess */ 401 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 402 while ((cv = (CV *)POPs))
334 { 403 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 404 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 405 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 406 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 407 }
348 408
349 PUTBACK; 409 PUTBACK;
350 } 410 }
351} 411}
352 412
353static void 413static void
354save_state(pTHX_ Coro__State c, int flags) 414save_perl (pTHX_ Coro__State c)
355{ 415{
356 { 416 {
357 dSP; 417 dSP;
358 I32 cxix = cxstack_ix; 418 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 419 PERL_CONTEXT *ccstk = cxstack;
… …
362 /* 422 /*
363 * 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
364 * (and reinitialize) all cv's in the whole callchain :( 424 * (and reinitialize) all cv's in the whole callchain :(
365 */ 425 */
366 426
367 PUSHs (Nullsv); 427 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 428 /* this loop was inspired by pp_caller */
369 for (;;) 429 for (;;)
370 { 430 {
371 do 431 while (cxix >= 0)
372 { 432 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 433 PERL_CONTEXT *cx = &ccstk[cxix--];
374 434
375 if (CxTYPE(cx) == CXt_SUB) 435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
376 { 436 {
377 CV *cv = cx->blk_sub.cv; 437 CV *cv = cx->blk_sub.cv;
438
378 if (CvDEPTH(cv)) 439 if (CvDEPTH (cv))
379 { 440 {
380#ifdef USE_THREADS
381 /*XPUSHs ((SV *)CvOWNER(cv));*/
382 /*CvOWNER(cv) = 0;*/
383 /*error must unlock this cv etc.. etc...*/
384#endif
385 EXTEND (SP, CvDEPTH(cv)*2); 441 EXTEND (SP, 3);
386
387 while (--CvDEPTH(cv))
388 {
389 /* this tells the restore code to increment CvDEPTH */
390 PUSHs (Nullsv);
391 PUSHs ((SV *)cv);
392 }
393
394 PUSHs ((SV *)CvPADLIST(cv)); 442 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 444 PUSHs ((SV *)cv);
396 445
397 get_padlist (cv); /* this is a monster */ 446 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv);
398 } 448 }
399 } 449 }
400 else if (CxTYPE(cx) == CXt_FORMAT)
401 {
402 /* I never used formats, so how should I know how these are implemented? */
403 /* my bold guess is as a simple, plain sub... */
404 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405 }
406 } 450 }
407 while (cxix >= 0);
408 451
409 if (top_si->si_type == PERLSI_MAIN) 452 if (top_si->si_type == PERLSI_MAIN)
410 break; 453 break;
411 454
412 top_si = top_si->si_prev; 455 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 456 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 457 cxix = top_si->si_cxix;
415 } 458 }
416 459
417 PUTBACK; 460 PUTBACK;
418 } 461 }
419 462
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 463 c->defav = GvAV (PL_defgv);
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 464 c->defsv = DEFSV;
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 465 c->errsv = ERRSV;
466 c->irssv_sv = GvSV (irsgv);
423 467
424 /* I have not the slightest idea of why av_reify is necessary */ 468#define VAR(name,type)c->name = PL_ ## name;
425 /* but if it's missing the defav contents magically get replaced sometimes */ 469# include "state.h"
426 if (c->defav) 470#undef VAR
427 av_reify (c->defav);
428
429 c->dowarn = PL_dowarn;
430 c->in_eval = PL_in_eval;
431
432 c->curstackinfo = PL_curstackinfo;
433 c->curstack = PL_curstack;
434 c->mainstack = PL_mainstack;
435 c->stack_sp = PL_stack_sp;
436 c->op = PL_op;
437 c->curpad = PL_curpad;
438 c->stack_base = PL_stack_base;
439 c->stack_max = PL_stack_max;
440 c->tmps_stack = PL_tmps_stack;
441 c->tmps_floor = PL_tmps_floor;
442 c->tmps_ix = PL_tmps_ix;
443 c->tmps_max = PL_tmps_max;
444 c->markstack = PL_markstack;
445 c->markstack_ptr = PL_markstack_ptr;
446 c->markstack_max = PL_markstack_max;
447 c->scopestack = PL_scopestack;
448 c->scopestack_ix = PL_scopestack_ix;
449 c->scopestack_max = PL_scopestack_max;
450 c->savestack = PL_savestack;
451 c->savestack_ix = PL_savestack_ix;
452 c->savestack_max = PL_savestack_max;
453 c->retstack = PL_retstack;
454 c->retstack_ix = PL_retstack_ix;
455 c->retstack_max = PL_retstack_max;
456 c->curcop = PL_curcop;
457 c->top_env = PL_top_env;
458} 471}
459 472
460/* 473/*
461 * allocate various perl stacks. This is an exact copy 474 * allocate various perl stacks. This is an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 475 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 476 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 477 * not usually need a lot of stackspace.
465 */ 478 */
466STATIC void 479#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks
481#else
482static void
467coro_init_stacks (pTHX) 483coro_init_stacks (pTHX)
468{ 484{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 485 PL_curstackinfo = new_stackinfo(64, 6);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 486 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 487 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 489
474 PL_stack_base = AvARRAY(PL_curstack); 490 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 491 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 493
478 New(50,PL_tmps_stack,96,SV*); 494 New(50,PL_tmps_stack,64,SV*);
479 PL_tmps_floor = -1; 495 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 496 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 497 PL_tmps_max = 64;
482 498
483 New(54,PL_markstack,16,I32); 499 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 500 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 501 PL_markstack_max = PL_markstack + 16;
486 502
503#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 504 SET_MARK_OFFSET;
505#endif
488 506
489 New(54,PL_scopestack,16,I32); 507 New(54,PL_scopestack,16,I32);
490 PL_scopestack_ix = 0; 508 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 509 PL_scopestack_max = 16;
492 510
493 New(54,PL_savestack,96,ANY); 511 New(54,PL_savestack,64,ANY);
494 PL_savestack_ix = 0; 512 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 513 PL_savestack_max = 64;
496 514
515#if !PERL_VERSION_ATLEAST (5,9,0)
497 New(54,PL_retstack,8,OP*); 516 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 517 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 518 PL_retstack_max = 4;
519#endif
500} 520}
521#endif
501 522
502/* 523/*
503 * destroy the stacks, the callchain etc... 524 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 525 */
506STATIC void 526static void
507destroy_stacks(pTHX) 527coro_destroy_stacks (pTHX)
508{ 528{
509 /* is this ugly, I ask? */
510 while (PL_scopestack_ix)
511 LEAVE;
512
513 /* sure it is, but more important: is it correct?? :/ */
514 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515 FREETMPS;
516
517 while (PL_curstackinfo->si_next) 529 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 530 PL_curstackinfo = PL_curstackinfo->si_next;
519 531
520 while (PL_curstackinfo) 532 while (PL_curstackinfo)
521 { 533 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 534 PERL_SI *p = PL_curstackinfo->si_prev;
523 535
524 { 536 if (!IN_DESTRUCT)
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 dounwind(-1);
531
532 SvREFCNT_dec(PL_curstackinfo->si_stack); 537 SvREFCNT_dec (PL_curstackinfo->si_stack);
538
533 Safefree(PL_curstackinfo->si_cxstack); 539 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 540 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 541 PL_curstackinfo = p;
536 } 542 }
537 543
538 Safefree(PL_tmps_stack); 544 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 545 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 546 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
542 Safefree(PL_retstack); 549 Safefree (PL_retstack);
543}
544
545static void
546allocate_stack (Coro__State ctx, int alloc)
547{
548 coro_stack *stack;
549
550 New (0, stack, 1, coro_stack);
551
552 stack->refcnt = 1;
553 stack->usecnt = 1;
554 stack->gencnt = ctx->gencnt = 0;
555 if (alloc)
556 {
557#ifdef HAVE_MMAP
558 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
559 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560 if (stack->sptr == (void *)-1)
561#endif 550#endif
551}
552
553static size_t
554coro_rss (pTHX_ struct coro *coro)
555{
556 size_t rss = sizeof (*coro);
557
558 if (coro->mainstack)
559 {
560 if (coro->flags & CF_RUNNING)
562 { 561 {
563 /*FIXME*//*D*//* reasonable stack size! */ 562 #define VAR(name,type)coro->name = PL_ ## name;
564 stack->ssize = -4096 * sizeof (long); 563 # include "state.h"
565 New (0, stack->sptr, 4096, long); 564 #undef VAR
566 } 565 }
567 }
568 else
569 stack->sptr = 0;
570 566
571 ctx->stack = stack; 567 rss += sizeof (coro->curstackinfo);
572} 568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
573 575
574static void 576#if !PERL_VERSION_ATLEAST (5,9,0)
575deallocate_stack (Coro__State ctx) 577 rss += coro->retstack_max * sizeof (OP *);
576{ 578#endif
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 { 579 }
583 if (!--stack->refcnt)
584 {
585#ifdef HAVE_MMAP
586 if (stack->ssize > 0 && stack->sptr)
587 munmap (stack->sptr, stack->ssize);
588 else
589#else
590 Safefree (stack->sptr);
591#endif
592 Safefree (stack);
593 }
594 else if (ctx->gencnt == stack->gencnt)
595 --stack->usecnt;
596 }
597}
598 580
581 return rss;
582}
583
584/** coroutine stack handling ************************************************/
585
599static void 586static void
600setup_coro (void *arg) 587coro_setup (pTHX_ struct coro *coro)
601{ 588{
602 /* 589 /*
603 * emulate part of the perl startup here. 590 * emulate part of the perl startup here.
604 */ 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{
605 dSP; 810 dSP;
606 Coro__State ctx = (Coro__State)arg; 811 LOGOP myop;
607 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608 812
609 coro_init_stacks (aTHX); 813 PL_top_env = &PL_start_env;
610 /*PL_curcop = 0;*/
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */
612 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args;
614 814
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);
615 SPAGAIN; 829 SPAGAIN;
830}
616 831
617 if (ctx->stack) 832/*
618 { 833 * this is a _very_ stripped down perl interpreter ;)
619 ctx->cursp = 0; 834 */
835static void
836coro_run (void *arg)
837{
838 dTHX;
620 839
621 PUSHMARK(SP); 840 /* coro_run is the alternative tail of transfer(), so unlock here. */
622 PUTBACK; 841 UNLOCK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624 842
625 if (SvTRUE (ERRSV)) 843 /* we now skip the entersub that lead to transfer() */
626 croak (NULL); 844 PL_op = PL_op->op_next;
627 else 845
628 croak ("FATAL: CCTXT coroutine returned!"); 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)
882 {
883# if CORO_STACKGUARD
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
885# endif
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
888 cctx->flags |= CC_MAPPED;
629 } 889 }
630 else 890 else
631 { 891#endif
632 UNOP myop;
633
634 PL_op = (OP *)&myop;
635
636 Zero(&myop, 1, UNOP);
637 myop.op_next = Nullop;
638 myop.op_flags = OPf_WANT_VOID;
639
640 PUSHMARK(SP);
641 XPUSHs (sub_init);
642 /*
643 * the next line is slightly wrong, as PL_op->op_next
644 * is actually being executed so we skip the first op.
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = pp_entersub();
651 SPAGAIN;
652
653 ENTER; /* necessary e.g. for dounwind */
654 } 892 {
655} 893 cctx->ssize = coro_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long);
656 895
657static void 896 if (!cctx->sptr)
658continue_coro (void *arg) 897 {
659{ 898 perror ("FATAL: unable to allocate stack for coroutine");
660 /* 899 _exit (EXIT_FAILURE);
661 * this is a _very_ stripped down perl interpreter ;) 900 }
662 */
663 Coro__State ctx = (Coro__State)arg;
664 901
665 /*FIXME*//* must set up top_env here */ 902 stack_start = cctx->sptr;
666 ctx->cursp = 0; 903 stack_size = cctx->ssize;
667 PL_op = PL_op->op_next; 904 }
668 CALLRUNOPS(aTHX);
669 905
670 abort (); 906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
671} 907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
672 908
673STATIC void 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
973transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{
975 if (prev != next)
976 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
978 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
979
980 if (next->flags & CF_RUNNING)
981 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
982
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
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 993transfer (pTHX_ struct coro *prev, struct coro *next)
675{ 994{
676 dSP;
677 dSTACKLEVEL; 995 dSTACKLEVEL;
678 996
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 }
679 if (prev != next) 1003 else if (prev != next)
680 { 1004 {
681 if (next->mainstack) 1005 coro_cctx *prev__cctx;
1006
1007 if (prev->flags & CF_NEW)
682 { 1008 {
683 SAVE (prev, flags); 1009 /* create a new empty context */
684 LOAD (next); 1010 Newz (0, prev->cctx, 1, coro_cctx);
685 1011 prev->flags &= ~CF_NEW;
686 /* mark this state as in-use */ 1012 prev->flags |= CF_RUNNING;
687 next->mainstack = 0;
688 next->tmps_ix = -2;
689
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 {
693 if (!prev->stack)
694 allocate_stack (prev, 0);
695 else if (prev->cursp != stacklevel
696 && prev->stack->usecnt > 1)
697 {
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 }
714
715 } 1013 }
716 else if (next->tmps_ix == -2) 1014
717 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 }
718 else 1029 else
719 { 1030 {
720 SAVE (prev, -1); /* first get rid of the old state */ 1031 /* coroutine already started */
721 1032 save_perl (aTHX_ prev);
722 if (flags & TRANSFER_SAVE_CCTXT) 1033 load_perl (aTHX_ next);
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 {
729 setup_coro (next);
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 }
744 }
745 else
746 setup_coro (next);
747 } 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)
748 } 1085 {
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 */
749 1094
750 next->cursp = stacklevel; 1095 if (coro->mainstack && coro->mainstack != main_mainstack)
751} 1096 {
1097 struct coro temp;
752 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
753MODULE = Coro::State PACKAGE = Coro::State 1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
754 1381
755PROTOTYPES: ENABLE 1382PROTOTYPES: DISABLE
756 1383
757BOOT: 1384BOOT:
758{ /* {} necessary for stoopid perl-5.6.x */ 1385{
759 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1386#ifdef USE_ITHREADS
760 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1387 MUTEX_INIT (&coro_mutex);
1388#endif
1389 BOOT_PAGESIZE;
1390
1391 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1392
761 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1393 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
762 1394
763 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1395 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
764 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1396 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
765 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1397 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
766 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1398 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
767
768 if (!padlist_cache)
769 padlist_cache = newHV ();
770 1399
771 main_mainstack = PL_mainstack; 1400 main_mainstack = PL_mainstack;
772} 1401 main_top_env = PL_top_env;
773 1402
774Coro::State 1403 while (main_top_env->je_prev)
775_newprocess(args) 1404 main_top_env = main_top_env->je_prev;
776 SV * args 1405
777 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, ...)
778 CODE: 1414 CODE:
779 Coro__State coro; 1415{
1416 struct coro *coro;
1417 HV *hv;
1418 int i;
780 1419
781 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
782 croak ("Coro::State::_newprocess expects an arrayref");
783
784 New (0, coro, 1, struct coro); 1420 Newz (0, coro, 1, struct coro);
1421 coro->args = newAV ();
1422 coro->flags = CF_NEW;
785 1423
786 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1424 if (coro_first) coro_first->prev = coro;
787 coro->mainstack = 0; /* actual work is done inside transfer */ 1425 coro->next = coro_first;
788 coro->stack = 0; 1426 coro_first = coro;
789 1427
790 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}
791 OUTPUT: 1435 OUTPUT:
792 RETVAL 1436 RETVAL
793 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
794void 1441void
795transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1442_set_stacklevel (...)
796 Coro::State_or_hashref prev 1443 ALIAS:
797 Coro::State_or_hashref next 1444 Coro::State::transfer = 1
798 int flags 1445 Coro::schedule = 2
799 PROTOTYPE: @ 1446 Coro::cede = 3
1447 Coro::cede_notself = 4
800 CODE: 1448 CODE:
801 PUTBACK; 1449{
802 transfer (aTHX_ prev, next, flags); 1450 struct transfer_args ta;
803 SPAGAIN; 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
804 1494
805void 1495void
806DESTROY(coro)
807 Coro::State coro
808 CODE:
809
810 if (coro->mainstack && coro->mainstack != main_mainstack)
811 {
812 struct coro temp;
813
814 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
815 LOAD(aTHX_ coro);
816
817 destroy_stacks (aTHX);
818
819 LOAD((&temp)); /* this will get rid of defsv etc.. */
820
821 coro->mainstack = 0;
822 }
823
824 deallocate_stack (coro);
825
826 Safefree (coro);
827
828void
829flush()
830 CODE:
831#ifdef MAY_FLUSH
832 flush_padlist_cache ();
833#endif
834
835void
836_exit(code) 1496_exit (code)
837 int code 1497 int code
838 PROTOTYPE: $ 1498 PROTOTYPE: $
839 CODE: 1499 CODE:
840#if defined(__GLIBC__) || _POSIX_C_SOURCE
841 _exit (code); 1500 _exit (code);
842#else
843 signal (SIGTERM, SIG_DFL);
844 raise (SIGTERM);
845 exit (code);
846#endif
847 1501
848MODULE = Coro::State PACKAGE = Coro::Cont 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
849 1510
850# this is slightly dirty 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
851 1524
852void 1525void
853yield(...) 1526list ()
854 PROTOTYPE: @ 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)
1542 {
1543 struct coro temp;
1544 Zero (&temp, 1, struct coro);
1545
1546 if (!(coro->flags & CF_RUNNING))
1547 {
1548 save_perl (aTHX_ &temp);
1549 load_perl (aTHX_ coro);
1550 }
1551
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 }
1567
1568 if (!(coro->flags & CF_RUNNING))
1569 {
1570 save_perl (aTHX_ coro);
1571 load_perl (aTHX_ &temp);
1572 }
1573 }
1574}
1575
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
855 CODE: 1613 CODE:
856 static SV *returnstk; 1614 switch (ix)
857 SV *sv; 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)
1681 {
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
1688 coro->prio = newprio;
1689 }
1690}
1691 OUTPUT:
1692 RETVAL
1693
1694SV *
1695ready (SV *self)
1696 PROTOTYPE: $
1697 CODE:
1698 RETVAL = boolSV (api_ready (self));
1699 OUTPUT:
1700 RETVAL
1701
1702int
1703nready (...)
1704 PROTOTYPE:
1705 CODE:
1706 RETVAL = coro_nready;
1707 OUTPUT:
1708 RETVAL
1709
1710# for async_pool speedup
1711void
1712_pool_1 (SV *cb)
1713 CODE:
1714{
1715 struct coro *coro = SvSTATE (coro_current);
1716 HV *hv = (HV *)SvRV (coro_current);
858 AV *defav = GvAV (PL_defgv); 1717 AV *defav = GvAV (PL_defgv);
859 struct coro *prev, *next; 1718 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1719 AV *invoke_av;
1720 int i, len;
860 1721
861 if (!returnstk) 1722 if (!invoke)
862 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1723 croak ("\3terminate\2\n");
863 1724
864 /* set up @_ -- ugly */ 1725 SvREFCNT_dec (coro->saved_deffh);
865 av_clear (defav); 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 {
866 av_fill (defav, items - 1); 1738 av_fill (defav, len - 1);
867 while (items--) 1739 for (i = 0; i < len; ++i)
868 av_store (defav, items, SvREFCNT_inc (ST(items))); 1740 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1741 }
869 1742
870 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
871 sv = av_pop ((AV *)SvRV (returnstk));
872 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
873 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
874 SvREFCNT_dec (sv); 1743 SvREFCNT_dec (invoke);
1744}
875 1745
876 transfer(aTHX_ prev, next, 0); 1746void
1747_pool_2 (SV *cb)
1748 CODE:
1749{
1750 struct coro *coro = SvSTATE (coro_current);
877 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_)
1797 PROTOTYPE: $
1798 CODE:
1799{
1800 struct io_state *data = (void *)data_;
1801
1802 errno = data->errorno;
1803 PL_laststype = data->laststype;
1804 PL_laststatval = data->laststatval;
1805 PL_statcache = data->statcache;
1806}
1807

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