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Comparing Coro/Coro/State.xs (file contents):
Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs.
Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
4 9
5#include "libcoro/coro.c" 10#include "patchlevel.h"
11
12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20#include <setjmp.h>
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
6 24
7#ifdef HAVE_MMAP 25#ifdef HAVE_MMAP
8# include <unistd.h> 26# include <unistd.h>
9# include <sys/mman.h> 27# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 28# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
13# else 31# else
14# undef HAVE_MMAP 32# undef HAVE_MMAP
15# endif 33# endif
16# endif 34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
17#endif 42# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 43#else
30# define TRANSFER_LAZY_STACK 0x00000000 44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr
31#endif 67# endif
68# ifndef call_sv
69# define call_sv perl_call_sv
70# endif
71# ifndef get_sv
72# define get_sv perl_get_sv
73# endif
74# ifndef get_cv
75# define get_cv perl_get_cv
76# endif
77# ifndef IS_PADGV
78# define IS_PADGV(v) 0
79# endif
80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0
82# endif
83#endif
32 84
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 85/* 5.8.8 */
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
35 92
36#define SUB_INIT "Coro::State::initialize" 93/* 5.11 */
37#define UCORO_STATE "_coro_state" 94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
38 97
39/* The next macro should delcare a variable stacklevel that contains and approximation 98/* 5.8.7 */
40 * to the current C stack pointer. It's property is that it changes with each call 99#ifndef SvRV_set
41 * and should be unique. */ 100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD
105#endif
106
107#ifndef CORO_STACKGUARD
108# define CORO_STACKGUARD 0
109#endif
110
111/* prefer perl internal functions over our own? */
112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel
42#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
43 120
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 122
46/* this is actually not only the c stack but also c registers etc... */ 123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
137
138#include "CoroAPI.h"
139
140#ifdef USE_ITHREADS
141static perl_mutex coro_mutex;
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif
148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle;
178
179enum {
180 CC_MAPPED = 0x01,
181 CC_NOREUSE = 0x02, /* throw this away after tracing */
182 CC_TRACE = 0x04,
183 CC_TRACE_SUB = 0x08, /* trace sub calls */
184 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186};
187
188/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx {
190 struct coro_cctx *next;
191
192 /* the stack */
193 void *sptr;
194 size_t ssize;
195
196 /* cpu state */
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env;
200 coro_context cctx;
201
202#if CORO_USE_VALGRIND
203 int valgrind_id;
204#endif
205 unsigned char flags;
206} coro_cctx;
207
208enum {
209 CF_RUNNING = 0x0001, /* coroutine is running */
210 CF_READY = 0x0002, /* coroutine is ready */
211 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213};
214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
47typedef struct { 216typedef struct {
48 int refcnt; /* pointer reference counter */ 217 SV *defsv;
49 int usecnt; /* shared by how many coroutines */ 218 AV *defav;
50 int gencnt; /* generation counter */ 219 SV *errsv;
220 SV *irsgv;
221#define VAR(name,type) type name;
222# include "state.h"
223#undef VAR
224} perl_slots;
51 225
52 coro_context cctx; 226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53 227
54 void *sptr; 228/* this is a structure representing a perl-level coroutine */
55 long ssize; /* positive == mmap, otherwise malloc */
56} coro_stack;
57
58static coro_stack main_stack = { 1, 0, 0 };
59
60struct coro { 229struct coro {
61 /* the optional C context */ 230 /* the c coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 231 coro_cctx *cctx;
63 void *cursp;
64 int gencnt;
65 232
66 /* optionally saved, might be zero */ 233 /* process data */
67 AV *defav;
68 SV *defsv;
69 SV *errsv;
70
71 /* saved global state not related to stacks */
72 U8 dowarn;
73
74 /* the stacks and related info (callchain etc..) */
75 PERL_SI *curstackinfo;
76 AV *curstack;
77 AV *mainstack; 234 AV *mainstack;
78 SV **stack_sp; 235 perl_slots *slot; /* basically the saved sp */
79 OP *op;
80 SV **curpad;
81 SV **stack_base;
82 SV **stack_max;
83 SV **tmps_stack;
84 I32 tmps_floor;
85 I32 tmps_ix;
86 I32 tmps_max;
87 I32 *markstack;
88 I32 *markstack_ptr;
89 I32 *markstack_max;
90 I32 *scopestack;
91 I32 scopestack_ix;
92 I32 scopestack_max;
93 ANY *savestack;
94 I32 savestack_ix;
95 I32 savestack_max;
96 OP **retstack;
97 I32 retstack_ix;
98 I32 retstack_max;
99 COP *curcop;
100 JMPENV start_env;
101 JMPENV *top_env;
102 236
103 /* data associated with this coroutine (initial args) */ 237 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 238 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */
241
242 /* statistics */
243 int usecount; /* number of transfers to this coro */
244
245 /* coro process data */
246 int prio;
247 SV *throw; /* exception to be thrown */
248
249 /* async_pool */
250 SV *saved_deffh;
251
252 /* linked list */
253 struct coro *next, *prev;
105}; 254};
106 255
107typedef struct coro *Coro__State; 256typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 257typedef struct coro *Coro__State_or_hashref;
109 258
110static AV *main_mainstack; /* used to differentiate between $main and others */ 259/** Coro ********************************************************************/
111static HV *coro_state_stash;
112static SV *ucoro_state_sv;
113static U32 ucoro_state_hash;
114static HV *padlist_cache;
115 260
116/* mostly copied from op.c:cv_clone2 */ 261#define PRIO_MAX 3
117STATIC AV * 262#define PRIO_HIGH 1
118clone_padlist (AV *protopadlist) 263#define PRIO_NORMAL 0
264#define PRIO_LOW -1
265#define PRIO_IDLE -3
266#define PRIO_MIN -4
267
268/* for Coro.pm */
269static SV *coro_current;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
271static int coro_nready;
272static struct coro *coro_first;
273
274/** lowlevel stuff **********************************************************/
275
276static SV *
277coro_get_sv (pTHX_ const char *name, int create)
119{ 278{
120 AV *av; 279#if PERL_VERSION_ATLEAST (5,10,0)
121 I32 ix; 280 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 281 get_sv (name, create);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 282#endif
124 SV **pname = AvARRAY (protopad_name); 283 return get_sv (name, create);
125 SV **ppad = AvARRAY (protopad); 284}
126 I32 fname = AvFILLp (protopad_name); 285
127 I32 fpad = AvFILLp (protopad); 286static AV *
287coro_get_av (pTHX_ const char *name, int create)
288{
289#if PERL_VERSION_ATLEAST (5,10,0)
290 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
291 get_av (name, create);
292#endif
293 return get_av (name, create);
294}
295
296static HV *
297coro_get_hv (pTHX_ const char *name, int create)
298{
299#if PERL_VERSION_ATLEAST (5,10,0)
300 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
301 get_hv (name, create);
302#endif
303 return get_hv (name, create);
304}
305
306static AV *
307coro_clone_padlist (pTHX_ CV *cv)
308{
309 AV *padlist = CvPADLIST (cv);
128 AV *newpadlist, *newpad_name, *newpad; 310 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);
138 311
139 newpadlist = newAV (); 312 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 313 AvREAL_off (newpadlist);
141 av_store (newpadlist, 0, (SV *) newpad_name); 314#if PERL_VERSION_ATLEAST (5,10,0)
315 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
316#else
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist);
321
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
142 av_store (newpadlist, 1, (SV *) newpad); 323 av_store (newpadlist, 1, (SV *)newpad);
143 324
144 av = newAV (); /* will be @_ */ 325 return newpadlist;
145 av_extend (av, 0); 326}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 327
149 for (ix = fpad; ix > 0; ix--) 328static void
329free_padlist (pTHX_ AV *padlist)
330{
331 /* may be during global destruction */
332 if (SvREFCNT (padlist))
150 { 333 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 334 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 335 while (i >= 0)
153 { 336 {
154 char *name = SvPVX (namesv); /* XXX */ 337 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 338 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 339 {
159 else
160 { /* our own lexical */
161 SV *sv; 340 SV *sv;
162 if (*name == '&') 341 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 342 SvREFCNT_dec (sv);
164 else if (*name == '@') 343
165 sv = (SV *) newAV (); 344 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 } 345 }
174 } 346 }
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 }
186 347
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); 348 SvREFCNT_dec ((SV*)padlist);
227 } 349 }
228} 350}
229#endif 351
352static int
353coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
354{
355 AV *padlist;
356 AV *av = (AV *)mg->mg_obj;
357
358 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist);
361
362 return 0;
363}
364
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext
366#define CORO_MAGIC_type_state PERL_MAGIC_ext
367
368static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0,
370 coro_cv_free
371};
372
373#define CORO_MAGIC(sv,type) \
374 SvMAGIC (sv) \
375 ? SvMAGIC (sv)->mg_type == type \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0
379
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
381#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
382
383static struct coro *
384SvSTATE_ (pTHX_ SV *coro)
385{
386 HV *stash;
387 MAGIC *mg;
388
389 if (SvROK (coro))
390 coro = SvRV (coro);
391
392 if (expect_false (SvTYPE (coro) != SVt_PVHV))
393 croak ("Coro::State object required");
394
395 stash = SvSTASH (coro);
396 if (expect_false (stash != coro_stash && stash != coro_state_stash))
397 {
398 /* very slow, but rare, check */
399 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
400 croak ("Coro::State object required");
401 }
402
403 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr;
405}
406
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
230 408
231/* the next two functions merely cache the padlists */ 409/* the next two functions merely cache the padlists */
232STATIC void 410static void
233get_padlist (CV *cv) 411get_padlist (pTHX_ CV *cv)
234{ 412{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 413 MAGIC *mg = CORO_MAGIC_cv (cv);
414 AV *av;
236 415
237 if (he && AvFILLp ((AV *)*he) >= 0) 416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239 else 418 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 { 419 {
420#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */
422 CV *cp = Perl_cv_clone (cv);
423 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (*he); 425 SvREFCNT_dec (cp);
251 *he = (SV *)newAV (); 426#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
428#endif
252 } 429 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 430}
256
257#ifdef MAY_FLUSH
258STATIC void
259flush_padlist_cache ()
260{
261 HV *hv = padlist_cache;
262 padlist_cache = newHV ();
263
264 if (hv_iterinit (hv))
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 }
278
279 SvREFCNT_dec (hv);
280}
281#endif
282
283#define SB do {
284#define SE } while (0)
285
286#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
287#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
290 431
291static void 432static void
433put_padlist (pTHX_ CV *cv)
434{
435 MAGIC *mg = CORO_MAGIC_cv (cv);
436 AV *av;
437
438 if (expect_false (!mg))
439 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
440
441 av = (AV *)mg->mg_obj;
442
443 if (expect_false (AvFILLp (av) >= AvMAX (av)))
444 av_extend (av, AvMAX (av) + 1);
445
446 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
447}
448
449/** load & save, init *******************************************************/
450
451static void
292load_state(pTHX_ Coro__State c) 452load_perl (pTHX_ Coro__State c)
293{ 453{
294 PL_dowarn = c->dowarn; 454 perl_slots *slot = c->slot;
455 c->slot = 0;
295 456
296 PL_curstackinfo = c->curstackinfo;
297 PL_curstack = c->curstack;
298 PL_mainstack = c->mainstack; 457 PL_mainstack = c->mainstack;
299 PL_stack_sp = c->stack_sp;
300 PL_op = c->op;
301 PL_curpad = c->curpad;
302 PL_stack_base = c->stack_base;
303 PL_stack_max = c->stack_max;
304 PL_tmps_stack = c->tmps_stack;
305 PL_tmps_floor = c->tmps_floor;
306 PL_tmps_ix = c->tmps_ix;
307 PL_tmps_max = c->tmps_max;
308 PL_markstack = c->markstack;
309 PL_markstack_ptr = c->markstack_ptr;
310 PL_markstack_max = c->markstack_max;
311 PL_scopestack = c->scopestack;
312 PL_scopestack_ix = c->scopestack_ix;
313 PL_scopestack_max = c->scopestack_max;
314 PL_savestack = c->savestack;
315 PL_savestack_ix = c->savestack_ix;
316 PL_savestack_max = c->savestack_max;
317 PL_retstack = c->retstack;
318 PL_retstack_ix = c->retstack_ix;
319 PL_retstack_max = c->retstack_max;
320 PL_curcop = c->curcop;
321 PL_start_env = c->start_env;
322 PL_top_env = c->top_env;
323 458
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 459 GvSV (PL_defgv) = slot->defsv;
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 460 GvAV (PL_defgv) = slot->defav;
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 461 GvSV (PL_errgv) = slot->errsv;
462 GvSV (irsgv) = slot->irsgv;
463
464 #define VAR(name,type) PL_ ## name = slot->name;
465 # include "state.h"
466 #undef VAR
327 467
328 { 468 {
329 dSP; 469 dSP;
470
330 CV *cv; 471 CV *cv;
331 472
332 /* now do the ugly restore mess */ 473 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 474 while (expect_true (cv = (CV *)POPs))
334 { 475 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 476 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 477 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 478 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 479 }
348 480
349 PUTBACK; 481 PUTBACK;
350 } 482 }
351} 483}
352 484
353static void 485static void
354save_state(pTHX_ Coro__State c, int flags) 486save_perl (pTHX_ Coro__State c)
355{ 487{
356 { 488 {
357 dSP; 489 dSP;
358 I32 cxix = cxstack_ix; 490 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 491 PERL_CONTEXT *ccstk = cxstack;
… …
362 /* 494 /*
363 * the worst thing you can imagine happens first - we have to save 495 * the worst thing you can imagine happens first - we have to save
364 * (and reinitialize) all cv's in the whole callchain :( 496 * (and reinitialize) all cv's in the whole callchain :(
365 */ 497 */
366 498
367 PUSHs (Nullsv); 499 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 500 /* this loop was inspired by pp_caller */
369 for (;;) 501 for (;;)
370 { 502 {
371 do 503 while (expect_true (cxix >= 0))
372 { 504 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 505 PERL_CONTEXT *cx = &ccstk[cxix--];
374 506
375 if (CxTYPE(cx) == CXt_SUB) 507 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376 { 508 {
377 CV *cv = cx->blk_sub.cv; 509 CV *cv = cx->blk_sub.cv;
510
378 if (CvDEPTH(cv)) 511 if (expect_true (CvDEPTH (cv)))
379 { 512 {
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); 513 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)); 514 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 516 PUSHs ((SV *)cv);
396 517
397 get_padlist (cv); /* this is a monster */ 518 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv);
398 } 520 }
399 } 521 }
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 } 522 }
407 while (cxix >= 0);
408 523
409 if (top_si->si_type == PERLSI_MAIN) 524 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 525 break;
411 526
412 top_si = top_si->si_prev; 527 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 528 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 529 cxix = top_si->si_cxix;
415 } 530 }
416 531
417 PUTBACK; 532 PUTBACK;
418 } 533 }
419 534
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 535 /* allocate some space on the context stack for our purposes */
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 536 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 537 if (SLOT_COUNT >= 1) CXINC;
538 if (SLOT_COUNT >= 2) CXINC;
539 if (SLOT_COUNT >= 3) CXINC;
540 {
541 int i;
542 for (i = 3; i < SLOT_COUNT; ++i)
543 CXINC;
544 }
545 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 546
424 /* I have not the slightest idea of why av_reify is necessary */
425 /* but if it's missing the defav contents magically get replaced sometimes */
426 if (c->defav)
427 av_reify (c->defav);
428
429 c->dowarn = PL_dowarn;
430
431 c->curstackinfo = PL_curstackinfo;
432 c->curstack = PL_curstack;
433 c->mainstack = PL_mainstack; 547 c->mainstack = PL_mainstack;
434 c->stack_sp = PL_stack_sp; 548
435 c->op = PL_op; 549 {
436 c->curpad = PL_curpad; 550 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
437 c->stack_base = PL_stack_base; 551
438 c->stack_max = PL_stack_max; 552 slot->defav = GvAV (PL_defgv);
439 c->tmps_stack = PL_tmps_stack; 553 slot->defsv = DEFSV;
440 c->tmps_floor = PL_tmps_floor; 554 slot->errsv = ERRSV;
441 c->tmps_ix = PL_tmps_ix; 555 slot->irsgv = GvSV (irsgv);
442 c->tmps_max = PL_tmps_max; 556
443 c->markstack = PL_markstack; 557 #define VAR(name,type) slot->name = PL_ ## name;
444 c->markstack_ptr = PL_markstack_ptr; 558 # include "state.h"
445 c->markstack_max = PL_markstack_max; 559 #undef VAR
446 c->scopestack = PL_scopestack; 560 }
447 c->scopestack_ix = PL_scopestack_ix;
448 c->scopestack_max = PL_scopestack_max;
449 c->savestack = PL_savestack;
450 c->savestack_ix = PL_savestack_ix;
451 c->savestack_max = PL_savestack_max;
452 c->retstack = PL_retstack;
453 c->retstack_ix = PL_retstack_ix;
454 c->retstack_max = PL_retstack_max;
455 c->curcop = PL_curcop;
456 c->start_env = PL_start_env;
457 c->top_env = PL_top_env;
458} 561}
459 562
460/* 563/*
461 * allocate various perl stacks. This is an exact copy 564 * allocate various perl stacks. This is an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 565 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 566 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 567 * not usually need a lot of stackspace.
465 */ 568 */
466STATIC void 569#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks
571#else
572static void
467coro_init_stacks (pTHX) 573coro_init_stacks (pTHX)
468{ 574{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 575 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 576 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 577 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 578 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 579
474 PL_stack_base = AvARRAY(PL_curstack); 580 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 581 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 582 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 583
478 New(50,PL_tmps_stack,96,SV*); 584 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 585 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 586 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 587 PL_tmps_max = 32;
482 588
483 New(54,PL_markstack,16,I32); 589 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 590 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 591 PL_markstack_max = PL_markstack + 16;
486 592
593#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 594 SET_MARK_OFFSET;
595#endif
488 596
489 New(54,PL_scopestack,16,I32); 597 New(54,PL_scopestack,8,I32);
490 PL_scopestack_ix = 0; 598 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 599 PL_scopestack_max = 8;
492 600
493 New(54,PL_savestack,96,ANY); 601 New(54,PL_savestack,24,ANY);
494 PL_savestack_ix = 0; 602 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 603 PL_savestack_max = 24;
496 604
605#if !PERL_VERSION_ATLEAST (5,10,0)
497 New(54,PL_retstack,8,OP*); 606 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 607 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 608 PL_retstack_max = 4;
609#endif
500} 610}
611#endif
501 612
502/* 613/*
503 * destroy the stacks, the callchain etc... 614 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 615 */
506STATIC void 616static void
507destroy_stacks(pTHX) 617coro_destroy_stacks (pTHX)
508{ 618{
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) 619 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 620 PL_curstackinfo = PL_curstackinfo->si_next;
519 621
520 while (PL_curstackinfo) 622 while (PL_curstackinfo)
521 { 623 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 624 PERL_SI *p = PL_curstackinfo->si_prev;
523 625
524 { 626 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); 627 SvREFCNT_dec (PL_curstackinfo->si_stack);
628
533 Safefree(PL_curstackinfo->si_cxstack); 629 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 630 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 631 PL_curstackinfo = p;
536 } 632 }
537 633
538 Safefree(PL_tmps_stack); 634 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 635 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 636 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 637 Safefree (PL_savestack);
638#if !PERL_VERSION_ATLEAST (5,10,0)
542 Safefree(PL_retstack); 639 Safefree (PL_retstack);
640#endif
641}
642
643static size_t
644coro_rss (pTHX_ struct coro *coro)
645{
646 size_t rss = sizeof (*coro);
647
648 if (coro->mainstack)
649 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING)
654 {
655 slot = &tmp_slot;
656
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR
660 }
661 else
662 slot = coro->slot;
663
664 rss += sizeof (slot->curstackinfo);
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
667 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY);
671
672#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *);
674#endif
675 }
676
677 return rss;
678}
679
680/** coroutine stack handling ************************************************/
681
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
684
685/*
686 * This overrides the default magic get method of %SIG elements.
687 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
688 * and instead of tryign to save and restore the hash elements, we just provide
689 * readback here.
690 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
691 * not expecting this to actually change the hook. This is a potential problem
692 * when a schedule happens then, but we ignore this.
693 */
694static int
695coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
696{
697 const char *s = MgPV_nolen_const (mg);
698
699 if (*s == '_')
700 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
703 }
704
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
706}
707
708static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710{
711 const char *s = MgPV_nolen_const (mg);
712
713 if (*s == '_')
714 {
715 SV **svp = 0;
716
717 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
718 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
719
720 if (svp)
721 {
722 SV *old = *svp;
723 *svp = newSVsv (sv);
724 SvREFCNT_dec (old);
725 return 0;
726 }
727 }
728
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
543} 730}
544 731
545static void 732static void
546allocate_stack (Coro__State ctx, int alloc) 733coro_setup (pTHX_ struct coro *coro)
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
562 {
563 /*FIXME*//*D*//* reasonable stack size! */
564 stack->ssize = -4096 * sizeof (long);
565 New (0, stack->sptr, 4096, long);
566 }
567 }
568 else
569 stack->sptr = 0;
570
571 ctx->stack = stack;
572}
573
574static void
575deallocate_stack (Coro__State ctx)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
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
599static void
600setup_coro (void *arg)
601{ 734{
602 /* 735 /*
603 * emulate part of the perl startup here. 736 * emulate part of the perl startup here.
604 */ 737 */
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 738 coro_init_stacks (aTHX);
610 JMPENV_BOOTSTRAP; 739
740 PL_runops = RUNOPS_DEFAULT;
741 PL_curcop = &PL_compiling;
742 PL_in_eval = EVAL_NULL;
743 PL_comppad = 0;
744 PL_curpm = 0;
745 PL_curpad = 0;
746 PL_localizing = 0;
747 PL_dirty = 0;
748 PL_restartop = 0;
749#if PERL_VERSION_ATLEAST (5,10,0)
750 PL_parser = 0;
751#endif
752
753 /* recreate the die/warn hooks */
754 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
755 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
756
757 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0);
760 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
761 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
763
764 {
765 dSP;
766 LOGOP myop;
767
768 Zero (&myop, 1, LOGOP);
769 myop.op_next = Nullop;
770 myop.op_flags = OPf_WANT_VOID;
771
772 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
774 PUTBACK;
775 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611 SPAGAIN; 777 SPAGAIN;
778 }
612 779
613 /*PL_curcop = 0;*/ 780 /* this newly created coroutine might be run on an existing cctx which most
781 * likely was suspended in set_stacklevel, called from entersub.
782 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783 * so we ENTER here for symmetry
784 */
785 ENTER;
786}
787
788static void
789coro_destroy (pTHX_ struct coro *coro)
790{
791 if (!IN_DESTRUCT)
792 {
793 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0);
795 assert (PL_tmps_floor == -1);
796
797 /* free all temporaries */
798 FREETMPS;
799 assert (PL_tmps_ix == -1);
800
801 /* unwind all extra stacks */
802 POPSTACK_TO (PL_mainstack);
803
804 /* unwind main stack */
805 dounwind (-1);
806 }
807
808 SvREFCNT_dec (GvSV (PL_defgv));
614 SvREFCNT_dec (GvAV (PL_defgv)); 809 SvREFCNT_dec (GvAV (PL_defgv));
615 GvAV (PL_defgv) = ctx->args; 810 SvREFCNT_dec (GvSV (PL_errgv));
811 SvREFCNT_dec (PL_defoutgv);
812 SvREFCNT_dec (PL_rs);
813 SvREFCNT_dec (GvSV (irsgv));
616 814
617 if (ctx->stack) 815 SvREFCNT_dec (PL_diehook);
618 { 816 SvREFCNT_dec (PL_warnhook);
619 ctx->cursp = 0; 817
818 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw);
620 820
621 PUSHMARK(SP); 821 coro_destroy_stacks (aTHX);
622 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS);
624 croak ("FATAL: CCTXT coroutine returned!");
625 }
626 else
627 {
628 UNOP myop;
629
630 PL_op = (OP *)&myop;
631
632 Zero(&myop, 1, UNOP);
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = pp_entersub();
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 }
651} 822}
652 823
653static void 824static void
654continue_coro (void *arg) 825free_coro_mortal (pTHX)
655{ 826{
656 /* 827 if (expect_true (coro_mortal))
657 * this is a _very_ stripped down perl interpreter ;) 828 {
658 */ 829 SvREFCNT_dec (coro_mortal);
659 Coro__State ctx = (Coro__State)arg; 830 coro_mortal = 0;
660
661 ctx->cursp = 0;
662 PL_op = PL_op->op_next;
663 CALLRUNOPS(aTHX);
664 /*NORETURN*/
665 abort ();
666}
667
668STATIC void
669transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
670{
671 dSP;
672 dSTACKLEVEL;
673
674 if (prev != next)
675 { 831 }
676 if (next->mainstack) 832}
833
834static int
835runops_trace (pTHX)
836{
837 COP *oldcop = 0;
838 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx;
841
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 {
844 PERL_ASYNC_CHECK ();
845
846 if (cctx->flags & CC_TRACE_ALL)
677 { 847 {
678 SAVE (prev, flags); 848 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
679 LOAD (next);
680
681 /* mark this state as in-use */
682 next->mainstack = 0;
683 next->tmps_ix = -2;
684
685 /* stacklevel changed? if yes, grab the stack for us! */
686 if (flags & TRANSFER_SAVE_CCTXT)
687 { 849 {
688 if (!prev->stack) 850 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
689 allocate_stack (prev, 0); 851 SV **bot, **top;
690 else if (prev->cursp != stacklevel 852 AV *av = newAV (); /* return values */
691 && prev->stack->usecnt > 1) 853 SV **cb;
854 dSP;
855
856 GV *gv = CvGV (cx->blk_sub.cv);
857 SV *fullname = sv_2mortal (newSV (0));
858 if (isGV (gv))
859 gv_efullname3 (fullname, gv, 0);
860
861 bot = PL_stack_base + cx->blk_oldsp + 1;
862 top = cx->blk_gimme == G_ARRAY ? SP + 1
863 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot;
865
866 av_extend (av, top - bot);
867 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++));
869
870 PL_runops = RUNOPS_DEFAULT;
871 ENTER;
872 SAVETMPS;
873 EXTEND (SP, 3);
874 PUSHMARK (SP);
875 PUSHs (&PL_sv_no);
876 PUSHs (fullname);
877 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
878 PUTBACK;
879 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
880 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
881 SPAGAIN;
882 FREETMPS;
883 LEAVE;
884 PL_runops = runops_trace;
885 }
886
887 if (oldcop != PL_curcop)
888 {
889 oldcop = PL_curcop;
890
891 if (PL_curcop != &PL_compiling)
692 { 892 {
693 prev->gencnt = ++prev->stack->gencnt; 893 SV **cb;
694 prev->stack->usecnt = 1;
695 }
696 894
697 /* has our stack been invalidated? */ 895 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
698 if (next->stack && next->stack->gencnt != next->gencnt)
699 { 896 {
700 deallocate_stack (next); 897 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
701 allocate_stack (next, 1); 898
702 coro_create (&(next->stack->cctx), 899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
703 continue_coro, (void *)next, 900 {
704 next->stack->sptr, labs (next->stack->ssize)); 901 runops_proc_t old_runops = PL_runops;
902 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0));
905
906 if (isGV (gv))
907 gv_efullname3 (fullname, gv, 0);
908
909 PL_runops = RUNOPS_DEFAULT;
910 ENTER;
911 SAVETMPS;
912 EXTEND (SP, 3);
913 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes);
915 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
919 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN;
921 FREETMPS;
922 LEAVE;
923 PL_runops = runops_trace;
924 }
925
926 oldcxix = cxstack_ix;
705 } 927 }
706 928
707 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 929 if (cctx->flags & CC_TRACE_LINE)
708 }
709
710 }
711 else if (next->tmps_ix == -2)
712 croak ("tried to transfer to running coroutine");
713 else
714 {
715 SAVE (prev, -1); /* first get rid of the old state */
716
717 if (flags & TRANSFER_SAVE_CCTXT)
718 {
719 if (!prev->stack)
720 allocate_stack (prev, 0);
721
722 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
723 { 930 {
724 setup_coro (next); 931 dSP;
725 932
726 prev->stack->refcnt++; 933 PL_runops = RUNOPS_DEFAULT;
727 prev->stack->usecnt++; 934 ENTER;
728 next->stack = prev->stack; 935 SAVETMPS;
729 next->gencnt = prev->gencnt; 936 EXTEND (SP, 3);
937 PL_runops = RUNOPS_DEFAULT;
938 PUSHMARK (SP);
939 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
940 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
941 PUTBACK;
942 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
943 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
944 SPAGAIN;
945 FREETMPS;
946 LEAVE;
947 PL_runops = runops_trace;
730 } 948 }
731 else
732 {
733 allocate_stack (next, 1);
734 coro_create (&(next->stack->cctx),
735 setup_coro, (void *)next,
736 next->stack->sptr, labs (next->stack->ssize));
737 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738 } 949 }
739 } 950 }
740 else
741 setup_coro (next);
742 } 951 }
743 } 952 }
744 953
745 next->cursp = stacklevel; 954 TAINT_NOT;
955 return 0;
746} 956}
747 957
958/* inject a fake call to Coro::State::_cctx_init into the execution */
959/* _cctx_init should be careful, as it could be called at almost any time */
960/* during execution of a perl program */
961static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx)
963{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env;
968
969 if (cctx->flags & CC_TRACE)
970 PL_runops = runops_trace;
971
972 Zero (&myop, 1, LOGOP);
973 myop.op_next = PL_op;
974 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
975
976 PUSHMARK (SP);
977 EXTEND (SP, 2);
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
980 PUTBACK;
981 PL_op = (OP *)&myop;
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
983 SPAGAIN;
984}
985
986/*
987 * this is a _very_ stripped down perl interpreter ;)
988 */
989static void
990cctx_run (void *arg)
991{
992 dTHX;
993
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */
995 UNLOCK;
996
997 /* we now skip the entersub that lead to transfer() */
998 PL_op = PL_op->op_next;
999
1000 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg);
1002
1003 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op;
1005 perl_run (PL_curinterp);
1006
1007 /*
1008 * If perl-run returns we assume exit() was being called or the coro
1009 * fell off the end, which seems to be the only valid (non-bug)
1010 * reason for perl_run to return. We try to exit by jumping to the
1011 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept
1013 */
1014 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1016}
1017
1018static coro_cctx *
1019cctx_new ()
1020{
1021 coro_cctx *cctx;
1022 void *stack_start;
1023 size_t stack_size;
1024
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */
1032 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033
1034 if (cctx->sptr != (void *)-1)
1035 {
1036# if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED;
1042 }
1043 else
1044#endif
1045 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long);
1048
1049 if (!cctx->sptr)
1050 {
1051 perror ("FATAL: unable to allocate stack for coroutine");
1052 _exit (EXIT_FAILURE);
1053 }
1054
1055 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize;
1057 }
1058
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061
1062 return cctx;
1063}
1064
1065static void
1066cctx_destroy (coro_cctx *cctx)
1067{
1068 if (!cctx)
1069 return;
1070
1071 --cctx_count;
1072
1073#if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif
1076
1077#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize);
1080 else
1081#endif
1082 Safefree (cctx->sptr);
1083
1084 Safefree (cctx);
1085}
1086
1087/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1089
1090static coro_cctx *
1091cctx_get (pTHX)
1092{
1093 while (expect_true (cctx_first))
1094 {
1095 coro_cctx *cctx = cctx_first;
1096 cctx_first = cctx->next;
1097 --cctx_idle;
1098
1099 if (expect_true (!CCTX_EXPIRED (cctx)))
1100 return cctx;
1101
1102 cctx_destroy (cctx);
1103 }
1104
1105 return cctx_new ();
1106}
1107
1108static void
1109cctx_put (coro_cctx *cctx)
1110{
1111 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1113 {
1114 coro_cctx *first = cctx_first;
1115 cctx_first = first->next;
1116 --cctx_idle;
1117
1118 cctx_destroy (first);
1119 }
1120
1121 ++cctx_idle;
1122 cctx->next = cctx_first;
1123 cctx_first = cctx;
1124}
1125
1126/** coroutine switching *****************************************************/
1127
1128static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{
1131 if (expect_true (prev != next))
1132 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1135
1136 if (expect_false (next->flags & CF_RUNNING))
1137 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1138
1139 if (expect_false (next->flags & CF_DESTROYED))
1140 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1141
1142#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1145#endif
1146 }
1147}
1148
1149/* always use the TRANSFER macro */
1150static void NOINLINE
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{
1153 dSTACKLEVEL;
1154 static volatile int has_throw;
1155
1156 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next))
1158 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1160 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1161 }
1162 else if (expect_true (prev != next))
1163 {
1164 coro_cctx *prev__cctx;
1165
1166 if (expect_false (prev->flags & CF_NEW))
1167 {
1168 /* create a new empty context */
1169 Newz (0, prev->cctx, 1, coro_cctx);
1170 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING;
1172 }
1173
1174 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178
1179 /* first get rid of the old state */
1180 save_perl (aTHX_ prev);
1181
1182 if (expect_false (next->flags & CF_NEW))
1183 {
1184 /* need to start coroutine */
1185 next->flags &= ~CF_NEW;
1186 /* setup coroutine call */
1187 coro_setup (aTHX_ next);
1188 }
1189 else
1190 load_perl (aTHX_ next);
1191
1192 prev__cctx = prev->cctx;
1193
1194 /* possibly "free" the cctx */
1195 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE)
1198 && !force_cctx
1199 ))
1200 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1202 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1203
1204 prev->cctx = 0;
1205
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1207 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1208 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1209 if (!next->cctx)
1210 next->cctx = cctx_get (aTHX);
1211
1212 cctx_put (prev__cctx);
1213 }
1214
1215 ++next->usecount;
1216
1217 if (expect_true (!next->cctx))
1218 next->cctx = cctx_get (aTHX);
1219
1220 has_throw = !!next->throw;
1221
1222 if (expect_false (prev__cctx != next->cctx))
1223 {
1224 prev__cctx->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1227 }
1228
1229 free_coro_mortal (aTHX);
1230 UNLOCK;
1231
1232 if (expect_false (has_throw))
1233 {
1234 struct coro *coro = SvSTATE (coro_current);
1235
1236 if (coro->throw)
1237 {
1238 SV *exception = coro->throw;
1239 coro->throw = 0;
1240 sv_setsv (ERRSV, exception);
1241 croak (0);
1242 }
1243 }
1244 }
1245}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1253#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254
1255/** high level stuff ********************************************************/
1256
1257static int
1258coro_state_destroy (pTHX_ struct coro *coro)
1259{
1260 if (coro->flags & CF_DESTROYED)
1261 return 0;
1262
1263 coro->flags |= CF_DESTROYED;
1264
1265 if (coro->flags & CF_READY)
1266 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready;
1271 UNLOCK;
1272 }
1273 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275
1276 if (coro->mainstack && coro->mainstack != main_mainstack)
1277 {
1278 struct coro temp;
1279
1280 if (coro->flags & CF_RUNNING)
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282
1283 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro);
1285
1286 coro_destroy (aTHX_ coro);
1287
1288 load_perl (aTHX_ &temp);
1289
1290 coro->slot = 0;
1291 }
1292
1293 cctx_destroy (coro->cctx);
1294 SvREFCNT_dec (coro->args);
1295
1296 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next;
1299
1300 return 1;
1301}
1302
1303static int
1304coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1305{
1306 struct coro *coro = (struct coro *)mg->mg_ptr;
1307 mg->mg_ptr = 0;
1308
1309 coro->hv = 0;
1310
1311 if (--coro->refcnt < 0)
1312 {
1313 coro_state_destroy (aTHX_ coro);
1314 Safefree (coro);
1315 }
1316
1317 return 0;
1318}
1319
1320static int
1321coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1322{
1323 struct coro *coro = (struct coro *)mg->mg_ptr;
1324
1325 ++coro->refcnt;
1326
1327 return 0;
1328}
1329
1330static MGVTBL coro_state_vtbl = {
1331 0, 0, 0, 0,
1332 coro_state_free,
1333 0,
1334#ifdef MGf_DUP
1335 coro_state_dup,
1336#else
1337# define MGf_DUP 0
1338#endif
1339};
1340
1341static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{
1344 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta);
1347}
1348
1349static void
1350api_transfer (SV *prev_sv, SV *next_sv)
1351{
1352 dTHX;
1353 struct transfer_args ta;
1354
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1);
1357}
1358
1359/** Coro ********************************************************************/
1360
1361static void
1362coro_enq (pTHX_ SV *coro_sv)
1363{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1365}
1366
1367static SV *
1368coro_deq (pTHX)
1369{
1370 int prio;
1371
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1373 if (AvFILLp (coro_ready [prio]) >= 0)
1374 return av_shift (coro_ready [prio]);
1375
1376 return 0;
1377}
1378
1379static int
1380api_ready (SV *coro_sv)
1381{
1382 dTHX;
1383 struct coro *coro;
1384
1385 if (SvROK (coro_sv))
1386 coro_sv = SvRV (coro_sv);
1387
1388 coro = SvSTATE (coro_sv);
1389
1390 if (coro->flags & CF_READY)
1391 return 0;
1392
1393 coro->flags |= CF_READY;
1394
1395 LOCK;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1397 ++coro_nready;
1398 UNLOCK;
1399
1400 return 1;
1401}
1402
1403static int
1404api_is_ready (SV *coro_sv)
1405{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408}
1409
1410static void
1411prepare_schedule (pTHX_ struct transfer_args *ta)
1412{
1413 SV *prev_sv, *next_sv;
1414
1415 for (;;)
1416 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX);
1419
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv))
1422 {
1423 dSP;
1424 UNLOCK;
1425
1426 ENTER;
1427 SAVETMPS;
1428
1429 PUSHMARK (SP);
1430 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1432 SPAGAIN;
1433
1434 FREETMPS;
1435 LEAVE;
1436 continue;
1437 }
1438
1439 ta->next = SvSTATE (next_sv);
1440
1441 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */
1447 continue;
1448 }
1449
1450 --coro_nready;
1451 UNLOCK;
1452 break;
1453 }
1454
1455 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current);
1457 ta->prev = SvSTATE (prev_sv);
1458 TRANSFER_CHECK (*ta);
1459 assert (ta->next->flags & CF_READY);
1460 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv);
1462
1463 LOCK;
1464 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv;
1466 UNLOCK;
1467}
1468
1469static void
1470prepare_cede (pTHX_ struct transfer_args *ta)
1471{
1472 api_ready (coro_current);
1473 prepare_schedule (aTHX_ ta);
1474}
1475
1476static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta)
1478{
1479 if (coro_nready)
1480 {
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta);
1483 api_ready (prev);
1484 return 1;
1485 }
1486 else
1487 return 0;
1488}
1489
1490static void
1491api_schedule (void)
1492{
1493 dTHX;
1494 struct transfer_args ta;
1495
1496 prepare_schedule (aTHX_ &ta);
1497 TRANSFER (ta, 1);
1498}
1499
1500static int
1501api_cede (void)
1502{
1503 dTHX;
1504 struct transfer_args ta;
1505
1506 prepare_cede (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1);
1511 return 1;
1512 }
1513 else
1514 return 0;
1515}
1516
1517static int
1518api_cede_notself (void)
1519{
1520 dTHX;
1521 struct transfer_args ta;
1522
1523 if (prepare_cede_notself (aTHX_ &ta))
1524 {
1525 TRANSFER (ta, 1);
1526 return 1;
1527 }
1528 else
1529 return 0;
1530}
1531
1532static void
1533api_trace (SV *coro_sv, int flags)
1534{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv);
1537
1538 if (flags & CC_TRACE)
1539 {
1540 if (!coro->cctx)
1541 coro->cctx = cctx_new ();
1542 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack");
1544
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 {
1549 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1550
1551 if (coro->flags & CF_RUNNING)
1552 PL_runops = RUNOPS_DEFAULT;
1553 else
1554 coro->slot->runops = RUNOPS_DEFAULT;
1555 }
1556}
1557
748MODULE = Coro::State PACKAGE = Coro::State 1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749 1559
750PROTOTYPES: ENABLE 1560PROTOTYPES: DISABLE
751 1561
752BOOT: 1562BOOT:
753{ /* {} necessary for stoopid perl-5.6.x */ 1563{
754 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1564#ifdef USE_ITHREADS
755 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1565 MUTEX_INIT (&coro_mutex);
1566#endif
1567 BOOT_PAGESIZE;
1568
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1573 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1574 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1575 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580
756 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1581 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757 1582
758 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1583 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1584 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1585 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1586 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763 if (!padlist_cache)
764 padlist_cache = newHV ();
765 1587
766 main_mainstack = PL_mainstack; 1588 main_mainstack = PL_mainstack;
767} 1589 main_top_env = PL_top_env;
768 1590
769Coro::State 1591 while (main_top_env->je_prev)
770_newprocess(args) 1592 main_top_env = main_top_env->je_prev;
771 SV * args 1593
772 PROTOTYPE: $ 1594 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION;
1596 coroapi.transfer = api_transfer;
1597
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599}
1600
1601SV *
1602new (char *klass, ...)
773 CODE: 1603 CODE:
774 Coro__State coro; 1604{
1605 struct coro *coro;
1606 MAGIC *mg;
1607 HV *hv;
1608 int i;
775 1609
776 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
777 croak ("Coro::State::_newprocess expects an arrayref");
778
779 New (0, coro, 1, struct coro); 1610 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV ();
1612 coro->flags = CF_NEW;
780 1613
781 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1614 if (coro_first) coro_first->prev = coro;
782 coro->mainstack = 0; /* actual work is done inside transfer */ 1615 coro->next = coro_first;
783 coro->stack = 0; 1616 coro_first = coro;
784 1617
785 RETVAL = coro; 1618 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622
1623 av_extend (coro->args, items - 1);
1624 for (i = 1; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i)));
1626}
786 OUTPUT: 1627 OUTPUT:
787 RETVAL 1628 RETVAL
788 1629
1630# these not obviously related functions are all rolled into the same xs
1631# function to increase chances that they all will call transfer with the same
1632# stack offset
789void 1633void
790transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1634_set_stacklevel (...)
791 Coro::State_or_hashref prev 1635 ALIAS:
792 Coro::State_or_hashref next 1636 Coro::State::transfer = 1
793 int flags 1637 Coro::schedule = 2
794 PROTOTYPE: @ 1638 Coro::cede = 3
1639 Coro::cede_notself = 4
795 CODE: 1640 CODE:
796 transfer (aTHX_ prev, next, flags); 1641{
1642 struct transfer_args ta;
1643
1644 PUTBACK;
1645 switch (ix)
1646 {
1647 case 0:
1648 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649 ta.next = 0;
1650 break;
1651
1652 case 1:
1653 if (items != 2)
1654 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657 break;
1658
1659 case 2:
1660 prepare_schedule (aTHX_ &ta);
1661 break;
1662
1663 case 3:
1664 prepare_cede (aTHX_ &ta);
1665 break;
1666
1667 case 4:
1668 if (!prepare_cede_notself (aTHX_ &ta))
1669 XSRETURN_EMPTY;
1670
1671 break;
1672 }
1673 SPAGAIN;
1674
1675 BARRIER;
1676 PUTBACK;
1677 TRANSFER (ta, 0);
1678 SPAGAIN; /* might be the sp of a different coroutine now */
1679 /* be extra careful not to ever do anything after TRANSFER */
1680}
1681
1682bool
1683_destroy (SV *coro_sv)
1684 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT:
1687 RETVAL
797 1688
798void 1689void
799DESTROY(coro) 1690_exit (code)
800 Coro::State coro 1691 int code
801 CODE: 1692 PROTOTYPE: $
1693 CODE:
1694 _exit (code);
802 1695
803 if (coro->mainstack && coro->mainstack != main_mainstack) 1696int
1697cctx_stacksize (int new_stacksize = 0)
1698 CODE:
1699 RETVAL = coro_stacksize;
1700 if (new_stacksize)
1701 coro_stacksize = new_stacksize;
1702 OUTPUT:
1703 RETVAL
1704
1705int
1706cctx_count ()
1707 CODE:
1708 RETVAL = cctx_count;
1709 OUTPUT:
1710 RETVAL
1711
1712int
1713cctx_idle ()
1714 CODE:
1715 RETVAL = cctx_idle;
1716 OUTPUT:
1717 RETVAL
1718
1719void
1720list ()
1721 PPCODE:
1722{
1723 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv)
1726 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1727}
1728
1729void
1730call (Coro::State coro, SV *coderef)
1731 ALIAS:
1732 eval = 1
1733 CODE:
1734{
1735 if (coro->mainstack)
804 { 1736 {
805 struct coro temp; 1737 struct coro temp;
806 1738
807 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1739 if (!(coro->flags & CF_RUNNING))
808 LOAD(aTHX_ coro); 1740 {
1741 PUTBACK;
1742 save_perl (aTHX_ &temp);
1743 load_perl (aTHX_ coro);
1744 }
809 1745
810 destroy_stacks (aTHX); 1746 {
1747 dSP;
1748 ENTER;
1749 SAVETMPS;
1750 PUTBACK;
1751 PUSHSTACK;
1752 PUSHMARK (SP);
811 1753
812 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1754 if (ix)
1755 eval_sv (coderef, 0);
1756 else
1757 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813 1758
814 coro->mainstack = 0; 1759 POPSTACK;
1760 SPAGAIN;
1761 FREETMPS;
1762 LEAVE;
1763 PUTBACK;
1764 }
1765
1766 if (!(coro->flags & CF_RUNNING))
1767 {
1768 save_perl (aTHX_ coro);
1769 load_perl (aTHX_ &temp);
1770 SPAGAIN;
1771 }
815 } 1772 }
1773}
816 1774
817 deallocate_stack (coro); 1775SV *
818 1776is_ready (Coro::State coro)
819 Safefree (coro); 1777 PROTOTYPE: $
1778 ALIAS:
1779 is_ready = CF_READY
1780 is_running = CF_RUNNING
1781 is_new = CF_NEW
1782 is_destroyed = CF_DESTROYED
1783 CODE:
1784 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT:
1786 RETVAL
820 1787
821void 1788void
822flush() 1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1790
1791SV *
1792has_stack (Coro::State coro)
1793 PROTOTYPE: $
823 CODE: 1794 CODE:
824#ifdef MAY_FLUSH 1795 RETVAL = boolSV (!!coro->cctx);
825 flush_padlist_cache (); 1796 OUTPUT:
826#endif 1797 RETVAL
827 1798
828MODULE = Coro::State PACKAGE = Coro::Cont 1799int
1800is_traced (Coro::State coro)
1801 PROTOTYPE: $
1802 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT:
1805 RETVAL
829 1806
830# this is slightly dirty 1807IV
1808rss (Coro::State coro)
1809 PROTOTYPE: $
1810 ALIAS:
1811 usecount = 1
1812 CODE:
1813 switch (ix)
1814 {
1815 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1816 case 1: RETVAL = coro->usecount; break;
1817 }
1818 OUTPUT:
1819 RETVAL
831 1820
832void 1821void
833yield(...) 1822force_cctx ()
834 PROTOTYPE: @ 1823 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0;
1826
1827MODULE = Coro::State PACKAGE = Coro
1828
1829BOOT:
1830{
1831 int i;
1832
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1836
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1838 SvREADONLY_on (coro_current);
1839
1840 coro_stash = gv_stashpv ("Coro", TRUE);
1841
1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1844 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1845 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1846 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1847 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1848
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV ();
1851
1852 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855
1856 coroapi.schedule = api_schedule;
1857 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready;
1862 coroapi.current = coro_current;
1863
1864 GCoroAPI = &coroapi;
1865 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv);
1867 }
1868}
1869
1870void
1871_set_current (SV *current)
1872 PROTOTYPE: $
1873 CODE:
1874 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1876
1877int
1878prio (Coro::State coro, int newprio = 0)
1879 ALIAS:
1880 nice = 1
835 CODE: 1881 CODE:
836 static SV *returnstk; 1882{
837 SV *sv; 1883 RETVAL = coro->prio;
1884
1885 if (items > 1)
1886 {
1887 if (ix)
1888 newprio = coro->prio - newprio;
1889
1890 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1891 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1892
1893 coro->prio = newprio;
1894 }
1895}
1896 OUTPUT:
1897 RETVAL
1898
1899SV *
1900ready (SV *self)
1901 PROTOTYPE: $
1902 CODE:
1903 RETVAL = boolSV (api_ready (self));
1904 OUTPUT:
1905 RETVAL
1906
1907int
1908nready (...)
1909 PROTOTYPE:
1910 CODE:
1911 RETVAL = coro_nready;
1912 OUTPUT:
1913 RETVAL
1914
1915void
1916throw (Coro::State self, SV *throw = &PL_sv_undef)
1917 PROTOTYPE: $;$
1918 CODE:
1919 SvREFCNT_dec (self->throw);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921
1922void
1923swap_defsv (Coro::State self)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE:
1928 if (!self->slot)
1929 croak ("cannot swap state with coroutine that has no saved state");
1930 else
1931 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1934
1935 SV *tmp = *src; *src = *dst; *dst = tmp;
1936 }
1937
1938# for async_pool speedup
1939void
1940_pool_1 (SV *cb)
1941 CODE:
1942{
1943 struct coro *coro = SvSTATE (coro_current);
1944 HV *hv = (HV *)SvRV (coro_current);
838 AV *defav = GvAV (PL_defgv); 1945 AV *defav = GvAV (PL_defgv);
839 struct coro *prev, *next; 1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1947 AV *invoke_av;
1948 int i, len;
840 1949
841 if (!returnstk) 1950 if (!invoke)
842 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1951 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1953 croak ("\3async_pool terminate\2\n");
1954 }
843 1955
844 /* set up @_ -- ugly */ 1956 SvREFCNT_dec (coro->saved_deffh);
845 av_clear (defav); 1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1958
1959 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961
1962 invoke_av = (AV *)SvRV (invoke);
1963 len = av_len (invoke_av);
1964
1965 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1966
1967 if (len > 0)
1968 {
846 av_fill (defav, items - 1); 1969 av_fill (defav, len - 1);
847 while (items--) 1970 for (i = 0; i < len; ++i)
848 av_store (defav, items, SvREFCNT_inc (ST(items))); 1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1972 }
849 1973
850 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
851 sv = av_pop ((AV *)SvRV (returnstk));
852 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
853 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
854 SvREFCNT_dec (sv); 1974 SvREFCNT_dec (invoke);
1975}
855 1976
856 transfer(aTHX_ prev, next, 0); 1977void
1978_pool_2 (SV *cb)
1979 CODE:
1980{
1981 struct coro *coro = SvSTATE (coro_current);
857 1982
1983 sv_setsv (cb, &PL_sv_undef);
1984
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0;
1987
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1992 croak ("\3async_pool terminate\2\n");
1993 }
1994
1995 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0);
2003
2004 av_push (av_async_pool, newSVsv (coro_current));
2005}
2006
2007
2008MODULE = Coro::State PACKAGE = Coro::AIO
2009
2010SV *
2011_get_state ()
2012 CODE:
2013{
2014 struct io_state *data;
2015
2016 RETVAL = newSV (sizeof (struct io_state));
2017 data = (struct io_state *)SvPVX (RETVAL);
2018 SvCUR_set (RETVAL, sizeof (struct io_state));
2019 SvPOK_only (RETVAL);
2020
2021 data->errorno = errno;
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025}
2026 OUTPUT:
2027 RETVAL
2028
2029void
2030_set_state (char *data_)
2031 PROTOTYPE: $
2032 CODE:
2033{
2034 struct io_state *data = (void *)data_;
2035
2036 errno = data->errorno;
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041

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