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Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
8 9
9#include "patchlevel.h" 10#include "patchlevel.h"
10 11
11// threaded perls might need much more, 65536 or more, 12#include <stdio.h>
12// which is 0.5 to 1MB 13#include <errno.h>
13#define STACKSIZE 16384 14#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
14 16
15#if PERL_VERSION < 6 17#ifdef HAVE_MMAP
18# include <unistd.h>
19# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS
21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
23# else
24# undef HAVE_MMAP
25# endif
26# endif
27# include <limits.h>
28# ifndef PAGESIZE
29# define PAGESIZE pagesize
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
31static long pagesize;
32# else
33# define BOOT_PAGESIZE (void)0
34# endif
35#else
36# define PAGESIZE 0
37# define BOOT_PAGESIZE (void)0
38#endif
39
40#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif
46
47/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8
49
50#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr 57# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr 58# define PL_ppaddr ppaddr
18# endif 59# endif
19# ifndef call_sv 60# ifndef call_sv
20# define call_sv perl_call_sv 61# define call_sv perl_call_sv
… …
31# ifndef IS_PADCONST 72# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 73# define IS_PADCONST(v) 0
33# endif 74# endif
34#endif 75#endif
35 76
36#include <signal.h> 77/* 5.8.8 */
37 78#ifndef GV_NOTQUAL
38#ifdef HAVE_MMAP 79# define GV_NOTQUAL 0
39# include <unistd.h>
40# include <sys/mman.h>
41# ifndef MAP_ANONYMOUS
42# ifdef MAP_ANON
43# define MAP_ANONYMOUS MAP_ANON
44# else
45# undef HAVE_MMAP
46# endif
47# endif 80#endif
81#ifndef newSV
82# define newSV(l) NEWSV(0,l)
48#endif 83#endif
49 84
50#define SUB_INIT "Coro::State::initialize" 85/* 5.11 */
51#define UCORO_STATE "_coro_state" 86#ifndef CxHASARGS
87# define CxHASARGS(cx) (cx)->blk_sub.hasargs
88#endif
52 89
53/* The next macro should declare a variable stacklevel that contains and approximation 90/* 5.8.7 */
54 * to the current C stack pointer. Its property is that it changes with each call 91#ifndef SvRV_set
55 * and should be unique. */ 92# define SvRV_set(s,v) SvRV(s) = (v)
93#endif
94
95#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
96# undef CORO_STACKGUARD
97#endif
98
99#ifndef CORO_STACKGUARD
100# define CORO_STACKGUARD 0
101#endif
102
103/* prefer perl internal functions over our own? */
104#ifndef CORO_PREFER_PERL_FUNCTIONS
105# define CORO_PREFER_PERL_FUNCTIONS 0
106#endif
107
108/* The next macros try to return the current stack pointer, in an as
109 * portable way as possible. */
110#define dSTACKLEVEL volatile char stacklevel
56#define dSTACKLEVEL void *stacklevel = &stacklevel 111#define STACKLEVEL ((void *)&stacklevel)
57 112
58#define IN_DESTRUCT (PL_main_cv == Nullcv) 113#define IN_DESTRUCT (PL_main_cv == Nullcv)
59 114
60#define labs(l) ((l) >= 0 ? (l) : -(l)) 115#if __GNUC__ >= 3
116# define attribute(x) __attribute__(x)
117# define BARRIER __asm__ __volatile__ ("" : : : "memory")
118# define expect(expr,value) __builtin_expect ((expr),(value))
119#else
120# define attribute(x)
121# define BARRIER
122# define expect(expr,value) (expr)
123#endif
124
125#define expect_false(expr) expect ((expr) != 0, 0)
126#define expect_true(expr) expect ((expr) != 0, 1)
127
128#define NOINLINE attribute ((noinline))
61 129
62#include "CoroAPI.h" 130#include "CoroAPI.h"
63 131
64#ifdef USE_ITHREADS 132#ifdef USE_ITHREADS
65static perl_mutex coro_mutex; 133static perl_mutex coro_mutex;
66# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 134# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 135# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68#else 136#else
69# define LOCK 0 137# define LOCK (void)0
70# define UNLOCK 0 138# define UNLOCK (void)0
71#endif 139#endif
72 140
141/* helper storage struct for Coro::AIO */
142struct io_state
143{
144 int errorno;
145 I32 laststype;
146 int laststatval;
147 Stat_t statcache;
148};
149
150static size_t coro_stacksize = CORO_STACKSIZE;
73static struct CoroAPI coroapi; 151static struct CoroAPI coroapi;
74static AV *main_mainstack; /* used to differentiate between $main and others */ 152static AV *main_mainstack; /* used to differentiate between $main and others */
153static JMPENV *main_top_env;
75static HV *coro_state_stash; 154static HV *coro_state_stash, *coro_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static SV *coro_mortal; /* will be freed after next transfer */ 155static volatile SV *coro_mortal; /* will be freed after next transfer */
79 156
80/* this is actually not only the c stack but also c registers etc... */ 157static GV *irsgv; /* $/ */
158static GV *stdoutgv; /* *STDOUT */
159static SV *rv_diehook;
160static SV *rv_warnhook;
161static HV *hv_sig; /* %SIG */
162
163/* async_pool helper stuff */
164static SV *sv_pool_rss;
165static SV *sv_pool_size;
166static AV *av_async_pool;
167
168static struct coro_cctx *cctx_first;
169static int cctx_count, cctx_idle;
170
171enum {
172 CC_MAPPED = 0x01,
173 CC_NOREUSE = 0x02, /* throw this away after tracing */
174 CC_TRACE = 0x04,
175 CC_TRACE_SUB = 0x08, /* trace sub calls */
176 CC_TRACE_LINE = 0x10, /* trace each statement */
177 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
178};
179
180/* this is a structure representing a c-level coroutine */
181typedef struct coro_cctx {
182 struct coro_cctx *next;
183
184 /* the stack */
185 void *sptr;
186 size_t ssize;
187
188 /* cpu state */
189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
191 JMPENV *top_env;
192 coro_context cctx;
193
194#if CORO_USE_VALGRIND
195 int valgrind_id;
196#endif
197 unsigned char flags;
198} coro_cctx;
199
200enum {
201 CF_RUNNING = 0x0001, /* coroutine is running */
202 CF_READY = 0x0002, /* coroutine is ready */
203 CF_NEW = 0x0004, /* has never been switched to */
204 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
205};
206
207/* the structure where most of the perl state is stored, overlaid on the cxstack */
81typedef struct { 208typedef struct {
82 int refcnt; /* pointer reference counter */ 209 SV *defsv;
83 int usecnt; /* shared by how many coroutines */ 210 AV *defav;
84 int gencnt; /* generation counter */ 211 SV *errsv;
212 SV *irsgv;
213#define VAR(name,type) type name;
214# include "state.h"
215#undef VAR
216} perl_slots;
85 217
86 coro_context cctx; 218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
87 219
88 void *sptr; 220/* this is a structure representing a perl-level coroutine */
89 long ssize; /* positive == mmap, otherwise malloc */
90} coro_stack;
91
92struct coro { 221struct coro {
93 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 222 /* the c coroutine allocated to this perl coroutine, if any */
94 JMPENV start_env; 223 coro_cctx *cctx;
95 224
96 /* the optional C context */ 225 /* process data */
97 coro_stack *stack;
98 void *cursp;
99 int gencnt;
100
101 /* optionally saved, might be zero */
102 AV *defav;
103 SV *defsv;
104 SV *errsv;
105
106 /* saved global state not related to stacks */
107 U8 dowarn;
108 I32 in_eval;
109
110 /* the stacks and related info (callchain etc..) */
111 PERL_SI *curstackinfo;
112 AV *curstack;
113 AV *mainstack; 226 AV *mainstack;
114 SV **stack_sp; 227 perl_slots *slot; /* basically the saved sp */
115 OP *op;
116 SV **curpad;
117 AV *comppad;
118 CV *compcv;
119 SV **stack_base;
120 SV **stack_max;
121 SV **tmps_stack;
122 I32 tmps_floor;
123 I32 tmps_ix;
124 I32 tmps_max;
125 I32 *markstack;
126 I32 *markstack_ptr;
127 I32 *markstack_max;
128 I32 *scopestack;
129 I32 scopestack_ix;
130 I32 scopestack_max;
131 ANY *savestack;
132 I32 savestack_ix;
133 I32 savestack_max;
134 OP **retstack;
135 I32 retstack_ix;
136 I32 retstack_max;
137 PMOP *curpm;
138 COP *curcop;
139 JMPENV *top_env;
140 228
141 /* data associated with this coroutine (initial args) */ 229 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 230 int refcnt; /* coroutines are refcounted, yes */
231 int flags; /* CF_ flags */
232 HV *hv; /* the perl hash associated with this coro, if any */
233
234 /* statistics */
235 int usecount; /* number of transfers to this coro */
236
237 /* coro process data */
238 int prio;
239 SV *throw; /* exception to be thrown */
240
241 /* async_pool */
242 SV *saved_deffh;
243
244 /* linked list */
245 struct coro *next, *prev;
143}; 246};
144 247
145typedef struct coro *Coro__State; 248typedef struct coro *Coro__State;
146typedef struct coro *Coro__State_or_hashref; 249typedef struct coro *Coro__State_or_hashref;
147 250
148/* mostly copied from op.c:cv_clone2 */ 251/** Coro ********************************************************************/
149STATIC AV * 252
150clone_padlist (pTHX_ AV *protopadlist) 253#define PRIO_MAX 3
254#define PRIO_HIGH 1
255#define PRIO_NORMAL 0
256#define PRIO_LOW -1
257#define PRIO_IDLE -3
258#define PRIO_MIN -4
259
260/* for Coro.pm */
261static SV *coro_current;
262static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
263static int coro_nready;
264static struct coro *coro_first;
265
266/** lowlevel stuff **********************************************************/
267
268static SV *
269coro_get_sv (pTHX_ const char *name, int create)
151{ 270{
152 AV *av; 271#if PERL_VERSION_ATLEAST (5,10,0)
153 I32 ix; 272 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
154 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 273 get_sv (name, create);
155 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 274#endif
156 SV **pname = AvARRAY (protopad_name); 275 return get_sv (name, create);
157 SV **ppad = AvARRAY (protopad); 276}
158 I32 fname = AvFILLp (protopad_name); 277
159 I32 fpad = AvFILLp (protopad); 278static AV *
279coro_get_av (pTHX_ const char *name, int create)
280{
281#if PERL_VERSION_ATLEAST (5,10,0)
282 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
283 get_av (name, create);
284#endif
285 return get_av (name, create);
286}
287
288static HV *
289coro_get_hv (pTHX_ const char *name, int create)
290{
291#if PERL_VERSION_ATLEAST (5,10,0)
292 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
293 get_hv (name, create);
294#endif
295 return get_hv (name, create);
296}
297
298static AV *
299coro_clone_padlist (pTHX_ CV *cv)
300{
301 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad_name, *newpad; 302 AV *newpadlist, *newpad;
161 SV **npad;
162
163 newpad_name = newAV ();
164 for (ix = fname; ix >= 0; ix--)
165 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167 newpad = newAV ();
168 av_fill (newpad, AvFILLp (protopad));
169 npad = AvARRAY (newpad);
170 303
171 newpadlist = newAV (); 304 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 305 AvREAL_off (newpadlist);
173 av_store (newpadlist, 0, (SV *) newpad_name); 306#if PERL_VERSION_ATLEAST (5,10,0)
307 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
308#else
309 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
310#endif
311 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
312 --AvFILLp (padlist);
313
314 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
174 av_store (newpadlist, 1, (SV *) newpad); 315 av_store (newpadlist, 1, (SV *)newpad);
175
176 av = newAV (); /* will be @_ */
177 av_extend (av, 0);
178 av_store (newpad, 0, (SV *) av);
179 AvFLAGS (av) = AVf_REIFY;
180
181 for (ix = fpad; ix > 0; ix--)
182 {
183 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
185 if (namesv && namesv != &PL_sv_undef)
186 {
187 char *name = SvPVX (namesv); /* XXX */
188
189 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
190 { /* lexical from outside? */
191 npad[ix] = SvREFCNT_inc (ppad[ix]);
192 }
193 else
194 { /* our own lexical */
195 SV *sv;
196 if (*name == '&')
197 sv = SvREFCNT_inc (ppad[ix]);
198 else if (*name == '@')
199 sv = (SV *) newAV ();
200 else if (*name == '%')
201 sv = (SV *) newHV ();
202 else
203 sv = NEWSV (0, 0);
204
205#ifdef SvPADBUSY
206 if (!SvPADBUSY (sv))
207#endif
208 SvPADMY_on (sv);
209
210 npad[ix] = sv;
211 }
212 }
213 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214 {
215 npad[ix] = SvREFCNT_inc (ppad[ix]);
216 }
217 else
218 {
219 SV *sv = NEWSV (0, 0);
220 SvPADTMP_on (sv);
221 npad[ix] = sv;
222 }
223 }
224
225#if 0 /* return -ENOTUNDERSTOOD */
226 /* Now that vars are all in place, clone nested closures. */
227
228 for (ix = fpad; ix > 0; ix--) {
229 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230 if (namesv
231 && namesv != &PL_sv_undef
232 && !(SvFLAGS(namesv) & SVf_FAKE)
233 && *SvPVX(namesv) == '&'
234 && CvCLONE(ppad[ix]))
235 {
236 CV *kid = cv_clone((CV*)ppad[ix]);
237 SvREFCNT_dec(ppad[ix]);
238 CvCLONE_on(kid);
239 SvPADMY_on(kid);
240 npad[ix] = (SV*)kid;
241 }
242 }
243#endif
244 316
245 return newpadlist; 317 return newpadlist;
246} 318}
247 319
248STATIC void 320static void
249free_padlist (pTHX_ AV *padlist) 321free_padlist (pTHX_ AV *padlist)
250{ 322{
251 /* may be during global destruction */ 323 /* may be during global destruction */
252 if (SvREFCNT (padlist)) 324 if (SvREFCNT (padlist))
253 { 325 {
… …
267 339
268 SvREFCNT_dec ((SV*)padlist); 340 SvREFCNT_dec ((SV*)padlist);
269 } 341 }
270} 342}
271 343
272STATIC int 344static int
273coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 345coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274{ 346{
275 AV *padlist; 347 AV *padlist;
276 AV *av = (AV *)mg->mg_obj; 348 AV *av = (AV *)mg->mg_obj;
277 349
278 /* casting is fun. */ 350 /* casting is fun. */
279 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 351 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280 free_padlist (aTHX_ padlist); 352 free_padlist (aTHX_ padlist);
281 353
282 SvREFCNT_dec (av); 354 return 0;
283} 355}
284 356
285#define PERL_MAGIC_coro PERL_MAGIC_ext 357#define CORO_MAGIC_type_cv PERL_MAGIC_ext
358#define CORO_MAGIC_type_state PERL_MAGIC_ext
286 359
287static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 360static MGVTBL coro_cv_vtbl = {
361 0, 0, 0, 0,
362 coro_cv_free
363};
364
365#define CORO_MAGIC(sv,type) \
366 SvMAGIC (sv) \
367 ? SvMAGIC (sv)->mg_type == type \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type) \
370 : 0
371
372#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
373#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
374
375static struct coro *
376SvSTATE_ (pTHX_ SV *coro)
377{
378 HV *stash;
379 MAGIC *mg;
380
381 if (SvROK (coro))
382 coro = SvRV (coro);
383
384 if (expect_false (SvTYPE (coro) != SVt_PVHV))
385 croak ("Coro::State object required");
386
387 stash = SvSTASH (coro);
388 if (expect_false (stash != coro_stash && stash != coro_state_stash))
389 {
390 /* very slow, but rare, check */
391 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
392 croak ("Coro::State object required");
393 }
394
395 mg = CORO_MAGIC_state (coro);
396 return (struct coro *)mg->mg_ptr;
397}
398
399#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
288 400
289/* the next two functions merely cache the padlists */ 401/* the next two functions merely cache the padlists */
290STATIC void 402static void
291get_padlist (pTHX_ CV *cv) 403get_padlist (pTHX_ CV *cv)
292{ 404{
293 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 405 MAGIC *mg = CORO_MAGIC_cv (cv);
406 AV *av;
294 407
295 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 408 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
296 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 409 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
297 else 410 else
411 {
412#if CORO_PREFER_PERL_FUNCTIONS
413 /* this is probably cleaner, but also slower? */
414 CV *cp = Perl_cv_clone (cv);
415 CvPADLIST (cv) = CvPADLIST (cp);
416 CvPADLIST (cp) = 0;
417 SvREFCNT_dec (cp);
418#else
298 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 419 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
420#endif
421 }
299} 422}
300 423
301STATIC void 424static void
302put_padlist (pTHX_ CV *cv) 425put_padlist (pTHX_ CV *cv)
303{ 426{
304 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 427 MAGIC *mg = CORO_MAGIC_cv (cv);
428 AV *av;
305 429
306 if (!mg) 430 if (expect_false (!mg))
307 { 431 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
308 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310 mg->mg_virtual = &vtbl_coro;
311 mg->mg_obj = (SV *)newAV ();
312 }
313 432
314 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 433 av = (AV *)mg->mg_obj;
315}
316 434
317#define SB do { 435 if (expect_false (AvFILLp (av) >= AvMAX (av)))
318#define SE } while (0) 436 av_extend (av, AvMAX (av) + 1);
319 437
320#define LOAD(state) load_state(aTHX_ (state)); 438 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
321#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 439}
322 440
323#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 441/** load & save, init *******************************************************/
324 442
325static void 443static void
326load_state(pTHX_ Coro__State c) 444load_perl (pTHX_ Coro__State c)
327{ 445{
328 PL_dowarn = c->dowarn; 446 perl_slots *slot = c->slot;
329 PL_in_eval = c->in_eval; 447 c->slot = 0;
330 448
331 PL_curstackinfo = c->curstackinfo;
332 PL_curstack = c->curstack;
333 PL_mainstack = c->mainstack; 449 PL_mainstack = c->mainstack;
334 PL_stack_sp = c->stack_sp;
335 PL_op = c->op;
336 PL_curpad = c->curpad;
337 PL_comppad = c->comppad;
338 PL_compcv = c->compcv;
339 PL_stack_base = c->stack_base;
340 PL_stack_max = c->stack_max;
341 PL_tmps_stack = c->tmps_stack;
342 PL_tmps_floor = c->tmps_floor;
343 PL_tmps_ix = c->tmps_ix;
344 PL_tmps_max = c->tmps_max;
345 PL_markstack = c->markstack;
346 PL_markstack_ptr = c->markstack_ptr;
347 PL_markstack_max = c->markstack_max;
348 PL_scopestack = c->scopestack;
349 PL_scopestack_ix = c->scopestack_ix;
350 PL_scopestack_max = c->scopestack_max;
351 PL_savestack = c->savestack;
352 PL_savestack_ix = c->savestack_ix;
353 PL_savestack_max = c->savestack_max;
354 PL_retstack = c->retstack;
355 PL_retstack_ix = c->retstack_ix;
356 PL_retstack_max = c->retstack_max;
357 PL_curpm = c->curpm;
358 PL_curcop = c->curcop;
359 PL_top_env = c->top_env;
360 450
361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 451 GvSV (PL_defgv) = slot->defsv;
362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 452 GvAV (PL_defgv) = slot->defav;
363 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 453 GvSV (PL_errgv) = slot->errsv;
454 GvSV (irsgv) = slot->irsgv;
455
456 #define VAR(name,type) PL_ ## name = slot->name;
457 # include "state.h"
458 #undef VAR
364 459
365 { 460 {
366 dSP; 461 dSP;
462
367 CV *cv; 463 CV *cv;
368 464
369 /* now do the ugly restore mess */ 465 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 466 while (expect_true (cv = (CV *)POPs))
371 { 467 {
372 AV *padlist = (AV *)POPs;
373
374 if (padlist)
375 {
376 put_padlist (aTHX_ cv); /* mark this padlist as available */ 468 put_padlist (aTHX_ cv); /* mark this padlist as available */
377 CvPADLIST(cv) = padlist; 469 CvDEPTH (cv) = PTR2IV (POPs);
378 } 470 CvPADLIST (cv) = (AV *)POPs;
379
380 ++CvDEPTH(cv);
381 } 471 }
382 472
383 PUTBACK; 473 PUTBACK;
384 } 474 }
385} 475}
386 476
387static void 477static void
388save_state(pTHX_ Coro__State c, int flags) 478save_perl (pTHX_ Coro__State c)
389{ 479{
390 { 480 {
391 dSP; 481 dSP;
392 I32 cxix = cxstack_ix; 482 I32 cxix = cxstack_ix;
393 PERL_CONTEXT *ccstk = cxstack; 483 PERL_CONTEXT *ccstk = cxstack;
… …
396 /* 486 /*
397 * the worst thing you can imagine happens first - we have to save 487 * the worst thing you can imagine happens first - we have to save
398 * (and reinitialize) all cv's in the whole callchain :( 488 * (and reinitialize) all cv's in the whole callchain :(
399 */ 489 */
400 490
401 PUSHs (Nullsv); 491 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 492 /* this loop was inspired by pp_caller */
403 for (;;) 493 for (;;)
404 { 494 {
405 while (cxix >= 0) 495 while (expect_true (cxix >= 0))
406 { 496 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 497 PERL_CONTEXT *cx = &ccstk[cxix--];
408 498
409 if (CxTYPE(cx) == CXt_SUB) 499 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
410 { 500 {
411 CV *cv = cx->blk_sub.cv; 501 CV *cv = cx->blk_sub.cv;
502
412 if (CvDEPTH(cv)) 503 if (expect_true (CvDEPTH (cv)))
413 { 504 {
414 EXTEND (SP, CvDEPTH(cv)*2); 505 EXTEND (SP, 3);
415
416 while (--CvDEPTH(cv))
417 {
418 /* this tells the restore code to increment CvDEPTH */
419 PUSHs (Nullsv);
420 PUSHs ((SV *)cv);
421 }
422
423 PUSHs ((SV *)CvPADLIST(cv)); 506 PUSHs ((SV *)CvPADLIST (cv));
507 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424 PUSHs ((SV *)cv); 508 PUSHs ((SV *)cv);
425 509
510 CvDEPTH (cv) = 0;
426 get_padlist (aTHX_ cv); /* this is a monster */ 511 get_padlist (aTHX_ cv);
427 } 512 }
428 } 513 }
429#ifdef CXt_FORMAT
430 else if (CxTYPE(cx) == CXt_FORMAT)
431 {
432 /* I never used formats, so how should I know how these are implemented? */
433 /* my bold guess is as a simple, plain sub... */
434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435 }
436#endif
437 } 514 }
438 515
439 if (top_si->si_type == PERLSI_MAIN) 516 if (expect_true (top_si->si_type == PERLSI_MAIN))
440 break; 517 break;
441 518
442 top_si = top_si->si_prev; 519 top_si = top_si->si_prev;
443 ccstk = top_si->si_cxstack; 520 ccstk = top_si->si_cxstack;
444 cxix = top_si->si_cxix; 521 cxix = top_si->si_cxix;
445 } 522 }
446 523
447 PUTBACK; 524 PUTBACK;
448 } 525 }
449 526
450 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 527 /* allocate some space on the context stack for our purposes */
451 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 528 /* we manually unroll here, as usually 2 slots is enough */
452 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 529 if (SLOT_COUNT >= 1) CXINC;
530 if (SLOT_COUNT >= 2) CXINC;
531 if (SLOT_COUNT >= 3) CXINC;
532 {
533 int i;
534 for (i = 3; i < SLOT_COUNT; ++i)
535 CXINC;
536 }
537 cxstack_ix -= SLOT_COUNT; /* undo allocation */
453 538
454 c->dowarn = PL_dowarn;
455 c->in_eval = PL_in_eval;
456
457 c->curstackinfo = PL_curstackinfo;
458 c->curstack = PL_curstack;
459 c->mainstack = PL_mainstack; 539 c->mainstack = PL_mainstack;
460 c->stack_sp = PL_stack_sp; 540
461 c->op = PL_op; 541 {
462 c->curpad = PL_curpad; 542 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
463 c->comppad = PL_comppad; 543
464 c->compcv = PL_compcv; 544 slot->defav = GvAV (PL_defgv);
465 c->stack_base = PL_stack_base; 545 slot->defsv = DEFSV;
466 c->stack_max = PL_stack_max; 546 slot->errsv = ERRSV;
467 c->tmps_stack = PL_tmps_stack; 547 slot->irsgv = GvSV (irsgv);
468 c->tmps_floor = PL_tmps_floor; 548
469 c->tmps_ix = PL_tmps_ix; 549 #define VAR(name,type) slot->name = PL_ ## name;
470 c->tmps_max = PL_tmps_max; 550 # include "state.h"
471 c->markstack = PL_markstack; 551 #undef VAR
472 c->markstack_ptr = PL_markstack_ptr; 552 }
473 c->markstack_max = PL_markstack_max;
474 c->scopestack = PL_scopestack;
475 c->scopestack_ix = PL_scopestack_ix;
476 c->scopestack_max = PL_scopestack_max;
477 c->savestack = PL_savestack;
478 c->savestack_ix = PL_savestack_ix;
479 c->savestack_max = PL_savestack_max;
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483 c->curpm = PL_curpm;
484 c->curcop = PL_curcop;
485 c->top_env = PL_top_env;
486} 553}
487 554
488/* 555/*
489 * allocate various perl stacks. This is an exact copy 556 * allocate various perl stacks. This is an exact copy
490 * of perl.c:init_stacks, except that it uses less memory 557 * of perl.c:init_stacks, except that it uses less memory
491 * on the (sometimes correct) assumption that coroutines do 558 * on the (sometimes correct) assumption that coroutines do
492 * not usually need a lot of stackspace. 559 * not usually need a lot of stackspace.
493 */ 560 */
494STATIC void 561#if CORO_PREFER_PERL_FUNCTIONS
562# define coro_init_stacks init_stacks
563#else
564static void
495coro_init_stacks (pTHX) 565coro_init_stacks (pTHX)
496{ 566{
497 LOCK; 567 PL_curstackinfo = new_stackinfo(32, 8);
498
499 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
500 PL_curstackinfo->si_type = PERLSI_MAIN; 568 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 569 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 570 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 571
504 PL_stack_base = AvARRAY(PL_curstack); 572 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 573 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 574 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 575
508 New(50,PL_tmps_stack,96,SV*); 576 New(50,PL_tmps_stack,32,SV*);
509 PL_tmps_floor = -1; 577 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 578 PL_tmps_ix = -1;
511 PL_tmps_max = 96; 579 PL_tmps_max = 32;
512 580
513 New(54,PL_markstack,16,I32); 581 New(54,PL_markstack,16,I32);
514 PL_markstack_ptr = PL_markstack; 582 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 583 PL_markstack_max = PL_markstack + 16;
516 584
517#ifdef SET_MARK_OFFSET 585#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 586 SET_MARK_OFFSET;
519#endif 587#endif
520 588
521 New(54,PL_scopestack,16,I32); 589 New(54,PL_scopestack,8,I32);
522 PL_scopestack_ix = 0; 590 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 591 PL_scopestack_max = 8;
524 592
525 New(54,PL_savestack,96,ANY); 593 New(54,PL_savestack,24,ANY);
526 PL_savestack_ix = 0; 594 PL_savestack_ix = 0;
527 PL_savestack_max = 96; 595 PL_savestack_max = 24;
528 596
597#if !PERL_VERSION_ATLEAST (5,10,0)
529 New(54,PL_retstack,8,OP*); 598 New(54,PL_retstack,4,OP*);
530 PL_retstack_ix = 0; 599 PL_retstack_ix = 0;
531 PL_retstack_max = 8; 600 PL_retstack_max = 4;
532 601#endif
533 UNLOCK;
534} 602}
603#endif
535 604
536/* 605/*
537 * destroy the stacks, the callchain etc... 606 * destroy the stacks, the callchain etc...
538 */ 607 */
539STATIC void 608static void
540destroy_stacks(pTHX) 609coro_destroy_stacks (pTHX)
541{ 610{
542 if (!IN_DESTRUCT)
543 {
544 /* is this ugly, I ask? */
545 LEAVE_SCOPE (0);
546
547 /* sure it is, but more important: is it correct?? :/ */
548 FREETMPS;
549
550 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
551 }
552
553 while (PL_curstackinfo->si_next) 611 while (PL_curstackinfo->si_next)
554 PL_curstackinfo = PL_curstackinfo->si_next; 612 PL_curstackinfo = PL_curstackinfo->si_next;
555 613
556 while (PL_curstackinfo) 614 while (PL_curstackinfo)
557 { 615 {
558 PERL_SI *p = PL_curstackinfo->si_prev; 616 PERL_SI *p = PL_curstackinfo->si_prev;
559 617
560 { /*D*//*remove*/
561 dSP;
562 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
563 PUTBACK; /* possibly superfluous */
564 }
565
566 if (!IN_DESTRUCT) 618 if (!IN_DESTRUCT)
567 {
568 dounwind (-1);/*D*//*remove*/
569 SvREFCNT_dec (PL_curstackinfo->si_stack); 619 SvREFCNT_dec (PL_curstackinfo->si_stack);
570 }
571 620
572 Safefree (PL_curstackinfo->si_cxstack); 621 Safefree (PL_curstackinfo->si_cxstack);
573 Safefree (PL_curstackinfo); 622 Safefree (PL_curstackinfo);
574 PL_curstackinfo = p; 623 PL_curstackinfo = p;
575 } 624 }
576 625
577 Safefree (PL_tmps_stack); 626 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 627 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 628 Safefree (PL_scopestack);
580 Safefree (PL_savestack); 629 Safefree (PL_savestack);
630#if !PERL_VERSION_ATLEAST (5,10,0)
581 Safefree (PL_retstack); 631 Safefree (PL_retstack);
632#endif
633}
634
635static size_t
636coro_rss (pTHX_ struct coro *coro)
637{
638 size_t rss = sizeof (*coro);
639
640 if (coro->mainstack)
641 {
642 perl_slots tmp_slot;
643 perl_slots *slot;
644
645 if (coro->flags & CF_RUNNING)
646 {
647 slot = &tmp_slot;
648
649 #define VAR(name,type) slot->name = PL_ ## name;
650 # include "state.h"
651 #undef VAR
652 }
653 else
654 slot = coro->slot;
655
656 rss += sizeof (slot->curstackinfo);
657 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
658 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
659 rss += slot->tmps_max * sizeof (SV *);
660 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
661 rss += slot->scopestack_max * sizeof (I32);
662 rss += slot->savestack_max * sizeof (ANY);
663
664#if !PERL_VERSION_ATLEAST (5,10,0)
665 rss += slot->retstack_max * sizeof (OP *);
666#endif
667 }
668
669 return rss;
670}
671
672/** coroutine stack handling ************************************************/
673
674static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
675static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
676
677/*
678 * This overrides the default magic get method of %SIG elements.
679 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
680 * and instead of tryign to save and restore the hash elements, we just provide
681 * readback here.
682 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
683 * not expecting this to actually change the hook. This is a potential problem
684 * when a schedule happens then, but we ignore this.
685 */
686static int
687coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
688{
689 const char *s = MgPV_nolen_const (mg);
690
691 if (*s == '_')
692 {
693 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
694 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
695 }
696
697 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
698}
699
700static int
701coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
702{
703 const char *s = MgPV_nolen_const (mg);
704
705 if (*s == '_')
706 {
707 SV **svp = 0;
708
709 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
710 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
711
712 if (svp)
713 {
714 SV *old = *svp;
715 *svp = newSVsv (sv);
716 SvREFCNT_dec (old);
717 return;
718 }
719 }
720
721 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
582} 722}
583 723
584static void 724static void
585allocate_stack (Coro__State ctx, int alloc) 725coro_setup (pTHX_ struct coro *coro)
586{
587 coro_stack *stack;
588
589 New (0, stack, 1, coro_stack);
590
591 stack->refcnt = 1;
592 stack->usecnt = 1;
593 stack->gencnt = ctx->gencnt = 0;
594
595 if (alloc)
596 {
597#if HAVE_MMAP
598 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600 if (stack->sptr == (void *)-1)
601#endif
602 {
603 /*FIXME*//*D*//* reasonable stack size! */
604 stack->ssize = - (STACKSIZE * sizeof (long));
605 New (0, stack->sptr, STACKSIZE, long);
606 }
607 }
608 else
609 stack->sptr = 0;
610
611 ctx->stack = stack;
612}
613
614static void
615deallocate_stack (Coro__State ctx)
616{
617 coro_stack *stack = ctx->stack;
618
619 ctx->stack = 0;
620
621 if (stack)
622 {
623 if (!--stack->refcnt)
624 {
625#ifdef HAVE_MMAP
626 if (stack->ssize > 0 && stack->sptr)
627 munmap (stack->sptr, stack->ssize);
628 else
629#endif
630 Safefree (stack->sptr);
631
632 Safefree (stack);
633 }
634 else if (ctx->gencnt == stack->gencnt)
635 --stack->usecnt;
636 }
637}
638
639static void
640setup_coro (void *arg)
641{ 726{
642 /* 727 /*
643 * emulate part of the perl startup here. 728 * emulate part of the perl startup here.
644 */ 729 */
645 dTHX;
646 dSP;
647 Coro__State ctx = (Coro__State)arg;
648 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649
650 coro_init_stacks (aTHX); 730 coro_init_stacks (aTHX);
651 /*PL_curcop = 0;*/ 731
652 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 732 PL_runops = RUNOPS_DEFAULT;
733 PL_curcop = &PL_compiling;
734 PL_in_eval = EVAL_NULL;
735 PL_comppad = 0;
736 PL_curpm = 0;
737 PL_curpad = 0;
738 PL_localizing = 0;
739 PL_dirty = 0;
740 PL_restartop = 0;
741#if PERL_VERSION_ATLEAST (5,10,0)
742 PL_parser = 0;
743#endif
744
745 /* recreate the die/warn hooks */
746 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
747 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
748
749 GvSV (PL_defgv) = newSV (0);
750 GvAV (PL_defgv) = coro->args; coro->args = 0;
751 GvSV (PL_errgv) = newSV (0);
752 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
753 PL_rs = newSVsv (GvSV (irsgv));
754 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
755
756 {
757 dSP;
758 LOGOP myop;
759
760 Zero (&myop, 1, LOGOP);
761 myop.op_next = Nullop;
762 myop.op_flags = OPf_WANT_VOID;
763
764 PUSHMARK (SP);
765 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
766 PUTBACK;
767 PL_op = (OP *)&myop;
768 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
769 SPAGAIN;
770 }
771
772 /* this newly created coroutine might be run on an existing cctx which most
773 * likely was suspended in set_stacklevel, called from entersub.
774 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
775 * so we ENTER here for symmetry
776 */
777 ENTER;
778}
779
780static void
781coro_destroy (pTHX_ struct coro *coro)
782{
783 if (!IN_DESTRUCT)
784 {
785 /* restore all saved variables and stuff */
786 LEAVE_SCOPE (0);
787 assert (PL_tmps_floor == -1);
788
789 /* free all temporaries */
790 FREETMPS;
791 assert (PL_tmps_ix == -1);
792
793 /* unwind all extra stacks */
794 POPSTACK_TO (PL_mainstack);
795
796 /* unwind main stack */
797 dounwind (-1);
798 }
799
800 SvREFCNT_dec (GvSV (PL_defgv));
653 SvREFCNT_dec (GvAV (PL_defgv)); 801 SvREFCNT_dec (GvAV (PL_defgv));
654 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 802 SvREFCNT_dec (GvSV (PL_errgv));
803 SvREFCNT_dec (PL_defoutgv);
804 SvREFCNT_dec (PL_rs);
805 SvREFCNT_dec (GvSV (irsgv));
655 806
656 SPAGAIN; 807 SvREFCNT_dec (PL_diehook);
808 SvREFCNT_dec (PL_warnhook);
809
810 SvREFCNT_dec (coro->saved_deffh);
811 SvREFCNT_dec (coro->throw);
657 812
658 if (ctx->stack) 813 coro_destroy_stacks (aTHX);
659 {
660 ctx->cursp = 0;
661
662 PUSHMARK(SP);
663 PUTBACK;
664 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
665
666 if (SvTRUE (ERRSV))
667 croak (NULL);
668 else
669 croak ("FATAL: CCTXT coroutine returned!");
670 }
671 else
672 {
673 UNOP myop;
674
675 PL_op = (OP *)&myop;
676
677 Zero(&myop, 1, UNOP);
678 myop.op_next = Nullop;
679 myop.op_flags = OPf_WANT_VOID;
680
681 PUSHMARK(SP);
682 XPUSHs (sub_init);
683 /*
684 * the next line is slightly wrong, as PL_op->op_next
685 * is actually being executed so we skip the first op.
686 * that doesn't matter, though, since it is only
687 * pp_nextstate and we never return...
688 * ah yes, and I don't care anyways ;)
689 */
690 PUTBACK;
691 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692 SPAGAIN;
693
694 ENTER; /* necessary e.g. for dounwind */
695 }
696} 814}
697 815
698static void 816static void
699continue_coro (void *arg) 817free_coro_mortal (pTHX)
700{ 818{
701 /* 819 if (expect_true (coro_mortal))
702 * this is a _very_ stripped down perl interpreter ;) 820 {
703 */ 821 SvREFCNT_dec (coro_mortal);
704 dTHX; 822 coro_mortal = 0;
705 Coro__State ctx = (Coro__State)arg;
706 JMPENV coro_start_env;
707
708 PL_top_env = &ctx->start_env;
709
710 ctx->cursp = 0;
711 PL_op = PL_op->op_next;
712 CALLRUNOPS(aTHX);
713
714 abort ();
715}
716
717STATIC void
718transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
719{
720 dSTACKLEVEL;
721
722 if (prev != next)
723 { 823 }
724 if (next->mainstack) 824}
825
826static int
827runops_trace (pTHX)
828{
829 COP *oldcop = 0;
830 int oldcxix = -2;
831 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
832 coro_cctx *cctx = coro->cctx;
833
834 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
835 {
836 PERL_ASYNC_CHECK ();
837
838 if (cctx->flags & CC_TRACE_ALL)
725 { 839 {
726 LOCK; 840 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
727 SAVE (prev, flags);
728 LOAD (next);
729 UNLOCK;
730
731 /* mark this state as in-use */
732 next->mainstack = 0;
733 next->tmps_ix = -2;
734
735 /* stacklevel changed? if yes, grab the stack for us! */
736 if (flags & TRANSFER_SAVE_CCTXT)
737 { 841 {
738 if (!prev->stack) 842 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739 allocate_stack (prev, 0); 843 SV **bot, **top;
740 else if (prev->cursp != stacklevel 844 AV *av = newAV (); /* return values */
741 && prev->stack->usecnt > 1) 845 SV **cb;
846 dSP;
847
848 GV *gv = CvGV (cx->blk_sub.cv);
849 SV *fullname = sv_2mortal (newSV (0));
850 if (isGV (gv))
851 gv_efullname3 (fullname, gv, 0);
852
853 bot = PL_stack_base + cx->blk_oldsp + 1;
854 top = cx->blk_gimme == G_ARRAY ? SP + 1
855 : cx->blk_gimme == G_SCALAR ? bot + 1
856 : bot;
857
858 av_extend (av, top - bot);
859 while (bot < top)
860 av_push (av, SvREFCNT_inc (*bot++));
861
862 PL_runops = RUNOPS_DEFAULT;
863 ENTER;
864 SAVETMPS;
865 EXTEND (SP, 3);
866 PUSHMARK (SP);
867 PUSHs (&PL_sv_no);
868 PUSHs (fullname);
869 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
870 PUTBACK;
871 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
872 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
873 SPAGAIN;
874 FREETMPS;
875 LEAVE;
876 PL_runops = runops_trace;
877 }
878
879 if (oldcop != PL_curcop)
880 {
881 oldcop = PL_curcop;
882
883 if (PL_curcop != &PL_compiling)
742 { 884 {
743 prev->gencnt = ++prev->stack->gencnt; 885 SV **cb;
744 prev->stack->usecnt = 1;
745 }
746 886
747 /* has our stack been invalidated? */ 887 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
748 if (next->stack && next->stack->gencnt != next->gencnt)
749 { 888 {
750 deallocate_stack (next); 889 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
751 allocate_stack (next, 1); 890
752 coro_create (&(next->stack->cctx), 891 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
753 continue_coro, (void *)next, 892 {
754 next->stack->sptr, labs (next->stack->ssize)); 893 runops_proc_t old_runops = PL_runops;
894 dSP;
895 GV *gv = CvGV (cx->blk_sub.cv);
896 SV *fullname = sv_2mortal (newSV (0));
897
898 if (isGV (gv))
899 gv_efullname3 (fullname, gv, 0);
900
901 PL_runops = RUNOPS_DEFAULT;
902 ENTER;
903 SAVETMPS;
904 EXTEND (SP, 3);
905 PUSHMARK (SP);
906 PUSHs (&PL_sv_yes);
907 PUSHs (fullname);
908 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
909 PUTBACK;
910 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
911 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
912 SPAGAIN;
913 FREETMPS;
914 LEAVE;
915 PL_runops = runops_trace;
916 }
917
918 oldcxix = cxstack_ix;
755 } 919 }
756 920
757 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 921 if (cctx->flags & CC_TRACE_LINE)
758 prev->cursp = stacklevel;
759 /* don't add any code here */
760 }
761 else
762 next->cursp = stacklevel;
763 }
764 else if (next->tmps_ix == -2)
765 croak ("tried to transfer to running coroutine");
766 else
767 {
768 LOCK;
769 SAVE (prev, -1); /* first get rid of the old state */
770 UNLOCK;
771
772 if (flags & TRANSFER_SAVE_CCTXT)
773 {
774 if (!prev->stack)
775 allocate_stack (prev, 0);
776
777 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778 { 922 {
779 PL_top_env = &next->start_env; 923 dSP;
780 924
781 setup_coro (next); 925 PL_runops = RUNOPS_DEFAULT;
782 next->cursp = stacklevel; 926 ENTER;
783 927 SAVETMPS;
784 prev->stack->refcnt++; 928 EXTEND (SP, 3);
785 prev->stack->usecnt++; 929 PL_runops = RUNOPS_DEFAULT;
786 next->stack = prev->stack; 930 PUSHMARK (SP);
787 next->gencnt = prev->gencnt; 931 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
932 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
933 PUTBACK;
934 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
935 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
936 SPAGAIN;
937 FREETMPS;
938 LEAVE;
939 PL_runops = runops_trace;
788 } 940 }
789 else
790 {
791 assert (!next->stack);
792 allocate_stack (next, 1);
793 coro_create (&(next->stack->cctx),
794 setup_coro, (void *)next,
795 next->stack->sptr, labs (next->stack->ssize));
796 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797 prev->cursp = stacklevel;
798 /* don't add any code here */
799 } 941 }
800 } 942 }
943 }
944 }
945
946 TAINT_NOT;
947 return 0;
948}
949
950/* inject a fake call to Coro::State::_cctx_init into the execution */
951/* _cctx_init should be careful, as it could be called at almost any time */
952/* during execution of a perl program */
953static void NOINLINE
954cctx_prepare (pTHX_ coro_cctx *cctx)
955{
956 dSP;
957 LOGOP myop;
958
959 PL_top_env = &PL_start_env;
960
961 if (cctx->flags & CC_TRACE)
962 PL_runops = runops_trace;
963
964 Zero (&myop, 1, LOGOP);
965 myop.op_next = PL_op;
966 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
967
968 PUSHMARK (SP);
969 EXTEND (SP, 2);
970 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
971 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
972 PUTBACK;
973 PL_op = (OP *)&myop;
974 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
975 SPAGAIN;
976}
977
978/*
979 * this is a _very_ stripped down perl interpreter ;)
980 */
981static void
982cctx_run (void *arg)
983{
984 dTHX;
985
986 /* cctx_run is the alternative tail of transfer(), so unlock here. */
987 UNLOCK;
988
989 /* we now skip the entersub that lead to transfer() */
990 PL_op = PL_op->op_next;
991
992 /* inject a fake subroutine call to cctx_init */
993 cctx_prepare (aTHX_ (coro_cctx *)arg);
994
995 /* somebody or something will hit me for both perl_run and PL_restartop */
996 PL_restartop = PL_op;
997 perl_run (PL_curinterp);
998
999 /*
1000 * If perl-run returns we assume exit() was being called or the coro
1001 * fell off the end, which seems to be the only valid (non-bug)
1002 * reason for perl_run to return. We try to exit by jumping to the
1003 * bootstrap-time "top" top_env, as we cannot restore the "main"
1004 * coroutine as Coro has no such concept
1005 */
1006 PL_top_env = main_top_env;
1007 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1008}
1009
1010static coro_cctx *
1011cctx_new ()
1012{
1013 coro_cctx *cctx;
1014 void *stack_start;
1015 size_t stack_size;
1016
1017 ++cctx_count;
1018
1019 Newz (0, cctx, 1, coro_cctx);
1020
1021#if HAVE_MMAP
1022 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1023 /* mmap supposedly does allocate-on-write for us */
1024 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1025
1026 if (cctx->sptr != (void *)-1)
1027 {
1028# if CORO_STACKGUARD
1029 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1030# endif
1031 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1032 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1033 cctx->flags |= CC_MAPPED;
1034 }
1035 else
1036#endif
1037 {
1038 cctx->ssize = coro_stacksize * (long)sizeof (long);
1039 New (0, cctx->sptr, coro_stacksize, long);
1040
1041 if (!cctx->sptr)
1042 {
1043 perror ("FATAL: unable to allocate stack for coroutine");
1044 _exit (EXIT_FAILURE);
1045 }
1046
1047 stack_start = cctx->sptr;
1048 stack_size = cctx->ssize;
1049 }
1050
1051 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1052 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1053
1054 return cctx;
1055}
1056
1057static void
1058cctx_destroy (coro_cctx *cctx)
1059{
1060 if (!cctx)
1061 return;
1062
1063 --cctx_count;
1064
1065#if CORO_USE_VALGRIND
1066 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1067#endif
1068
1069#if HAVE_MMAP
1070 if (cctx->flags & CC_MAPPED)
1071 munmap (cctx->sptr, cctx->ssize);
1072 else
1073#endif
1074 Safefree (cctx->sptr);
1075
1076 Safefree (cctx);
1077}
1078
1079/* wether this cctx should be destructed */
1080#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1081
1082static coro_cctx *
1083cctx_get (pTHX)
1084{
1085 while (expect_true (cctx_first))
1086 {
1087 coro_cctx *cctx = cctx_first;
1088 cctx_first = cctx->next;
1089 --cctx_idle;
1090
1091 if (expect_true (!CCTX_EXPIRED (cctx)))
1092 return cctx;
1093
1094 cctx_destroy (cctx);
1095 }
1096
1097 return cctx_new ();
1098}
1099
1100static void
1101cctx_put (coro_cctx *cctx)
1102{
1103 /* free another cctx if overlimit */
1104 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1105 {
1106 coro_cctx *first = cctx_first;
1107 cctx_first = first->next;
1108 --cctx_idle;
1109
1110 cctx_destroy (first);
1111 }
1112
1113 ++cctx_idle;
1114 cctx->next = cctx_first;
1115 cctx_first = cctx;
1116}
1117
1118/** coroutine switching *****************************************************/
1119
1120static void
1121transfer_check (pTHX_ struct coro *prev, struct coro *next)
1122{
1123 if (expect_true (prev != next))
1124 {
1125 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1126 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1127
1128 if (expect_false (next->flags & CF_RUNNING))
1129 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1130
1131 if (expect_false (next->flags & CF_DESTROYED))
1132 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1133
1134#if !PERL_VERSION_ATLEAST (5,10,0)
1135 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1136 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1137#endif
1138 }
1139}
1140
1141/* always use the TRANSFER macro */
1142static void NOINLINE
1143transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1144{
1145 dSTACKLEVEL;
1146 static volatile int has_throw;
1147
1148 /* sometimes transfer is only called to set idle_sp */
1149 if (expect_false (!next))
1150 {
1151 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1152 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1153 }
1154 else if (expect_true (prev != next))
1155 {
1156 coro_cctx *prev__cctx;
1157
1158 if (expect_false (prev->flags & CF_NEW))
1159 {
1160 /* create a new empty context */
1161 Newz (0, prev->cctx, 1, coro_cctx);
1162 prev->flags &= ~CF_NEW;
1163 prev->flags |= CF_RUNNING;
1164 }
1165
1166 prev->flags &= ~CF_RUNNING;
1167 next->flags |= CF_RUNNING;
1168
1169 LOCK;
1170
1171 /* first get rid of the old state */
1172 save_perl (aTHX_ prev);
1173
1174 if (expect_false (next->flags & CF_NEW))
1175 {
1176 /* need to start coroutine */
1177 next->flags &= ~CF_NEW;
1178 /* setup coroutine call */
1179 coro_setup (aTHX_ next);
1180 }
801 else 1181 else
1182 load_perl (aTHX_ next);
1183
1184 prev__cctx = prev->cctx;
1185
1186 /* possibly "free" the cctx */
1187 if (expect_true (
1188 prev__cctx->idle_sp == STACKLEVEL
1189 && !(prev__cctx->flags & CC_TRACE)
1190 && !force_cctx
1191 ))
1192 {
1193 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1194 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1195
1196 prev->cctx = 0;
1197
1198 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1199 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1200 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1201 if (!next->cctx)
1202 next->cctx = cctx_get (aTHX);
1203
1204 cctx_put (prev__cctx);
1205 }
1206
1207 ++next->usecount;
1208
1209 if (expect_true (!next->cctx))
1210 next->cctx = cctx_get (aTHX);
1211
1212 has_throw = !!next->throw;
1213
1214 if (expect_false (prev__cctx != next->cctx))
1215 {
1216 prev__cctx->top_env = PL_top_env;
1217 PL_top_env = next->cctx->top_env;
1218 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1219 }
1220
1221 free_coro_mortal (aTHX);
1222 UNLOCK;
1223
1224 if (expect_false (has_throw))
1225 {
1226 struct coro *coro = SvSTATE (coro_current);
1227
1228 if (coro->throw)
802 { 1229 {
1230 SV *exception = coro->throw;
1231 coro->throw = 0;
1232 sv_setsv (ERRSV, exception);
803 setup_coro (next); 1233 croak (0);
804 next->cursp = stacklevel;
805 } 1234 }
806 } 1235 }
807 } 1236 }
1237}
1238
1239struct transfer_args
1240{
1241 struct coro *prev, *next;
1242};
1243
1244#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1245#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1246
1247/** high level stuff ********************************************************/
1248
1249static int
1250coro_state_destroy (pTHX_ struct coro *coro)
1251{
1252 if (coro->flags & CF_DESTROYED)
1253 return 0;
1254
1255 coro->flags |= CF_DESTROYED;
1256
1257 if (coro->flags & CF_READY)
1258 {
1259 /* reduce nready, as destroying a ready coro effectively unreadies it */
1260 /* alternative: look through all ready queues and remove the coro */
1261 LOCK;
1262 --coro_nready;
1263 UNLOCK;
1264 }
1265 else
1266 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1267
1268 if (coro->mainstack && coro->mainstack != main_mainstack)
1269 {
1270 struct coro temp;
1271
1272 if (coro->flags & CF_RUNNING)
1273 croak ("FATAL: tried to destroy currently running coroutine");
1274
1275 save_perl (aTHX_ &temp);
1276 load_perl (aTHX_ coro);
1277
1278 coro_destroy (aTHX_ coro);
1279
1280 load_perl (aTHX_ &temp);
1281
1282 coro->slot = 0;
1283 }
1284
1285 cctx_destroy (coro->cctx);
1286 SvREFCNT_dec (coro->args);
1287
1288 if (coro->next) coro->next->prev = coro->prev;
1289 if (coro->prev) coro->prev->next = coro->next;
1290 if (coro == coro_first) coro_first = coro->next;
1291
1292 return 1;
1293}
1294
1295static int
1296coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1297{
1298 struct coro *coro = (struct coro *)mg->mg_ptr;
1299 mg->mg_ptr = 0;
1300
1301 coro->hv = 0;
1302
1303 if (--coro->refcnt < 0)
1304 {
1305 coro_state_destroy (aTHX_ coro);
1306 Safefree (coro);
1307 }
1308
1309 return 0;
1310}
1311
1312static int
1313coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1314{
1315 struct coro *coro = (struct coro *)mg->mg_ptr;
1316
1317 ++coro->refcnt;
1318
1319 return 0;
1320}
1321
1322static MGVTBL coro_state_vtbl = {
1323 0, 0, 0, 0,
1324 coro_state_free,
1325 0,
1326#ifdef MGf_DUP
1327 coro_state_dup,
1328#else
1329# define MGf_DUP 0
1330#endif
1331};
1332
1333static void
1334prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1335{
1336 ta->prev = SvSTATE (prev_sv);
1337 ta->next = SvSTATE (next_sv);
1338 TRANSFER_CHECK (*ta);
1339}
1340
1341static void
1342api_transfer (SV *prev_sv, SV *next_sv)
1343{
1344 dTHX;
1345 struct transfer_args ta;
1346
1347 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1348 TRANSFER (ta, 1);
1349}
1350
1351/** Coro ********************************************************************/
1352
1353static void
1354coro_enq (pTHX_ SV *coro_sv)
1355{
1356 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1357}
1358
1359static SV *
1360coro_deq (pTHX)
1361{
1362 int prio;
1363
1364 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1365 if (AvFILLp (coro_ready [prio]) >= 0)
1366 return av_shift (coro_ready [prio]);
1367
1368 return 0;
1369}
1370
1371static int
1372api_ready (SV *coro_sv)
1373{
1374 dTHX;
1375 struct coro *coro;
1376
1377 if (SvROK (coro_sv))
1378 coro_sv = SvRV (coro_sv);
1379
1380 coro = SvSTATE (coro_sv);
1381
1382 if (coro->flags & CF_READY)
1383 return 0;
1384
1385 coro->flags |= CF_READY;
808 1386
809 LOCK; 1387 LOCK;
810 if (coro_mortal) 1388 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
811 { 1389 ++coro_nready;
812 SvREFCNT_dec (coro_mortal);
813 coro_mortal = 0;
814 }
815 UNLOCK; 1390 UNLOCK;
816}
817 1391
818#define SV_CORO(sv,func) \ 1392 return 1;
819 do { \ 1393}
820 if (SvROK (sv)) \
821 sv = SvRV (sv); \
822 \
823 if (SvTYPE (sv) == SVt_PVHV) \
824 { \
825 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826 \
827 if (!he) \
828 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829 \
830 (sv) = SvRV (HeVAL(he)); \
831 } \
832 \
833 /* must also be changed inside Coro::Cont::yield */ \
834 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836 \
837 } while(0)
838 1394
839#define SvSTATE(sv) (struct coro *)SvIV (sv) 1395static int
1396api_is_ready (SV *coro_sv)
1397{
1398 dTHX;
1399 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1400}
840 1401
841static void 1402static void
842api_transfer(pTHX_ SV *prev, SV *next, int flags) 1403prepare_schedule (pTHX_ struct transfer_args *ta)
843{ 1404{
844 SV_CORO (prev, "Coro::transfer"); 1405 SV *prev_sv, *next_sv;
845 SV_CORO (next, "Coro::transfer");
846 1406
847 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1407 for (;;)
848} 1408 {
1409 LOCK;
1410 next_sv = coro_deq (aTHX);
849 1411
850/** Coro ********************************************************************/ 1412 /* nothing to schedule: call the idle handler */
1413 if (expect_false (!next_sv))
1414 {
1415 dSP;
1416 UNLOCK;
851 1417
852#define PRIO_MAX 3 1418 ENTER;
853#define PRIO_HIGH 1 1419 SAVETMPS;
854#define PRIO_NORMAL 0
855#define PRIO_LOW -1
856#define PRIO_IDLE -3
857#define PRIO_MIN -4
858 1420
859/* for Coro.pm */ 1421 PUSHMARK (SP);
860static GV *coro_current, *coro_idle; 1422 PUTBACK;
861static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1423 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
862static int coro_nready; 1424 SPAGAIN;
1425
1426 FREETMPS;
1427 LEAVE;
1428 continue;
1429 }
1430
1431 ta->next = SvSTATE (next_sv);
1432
1433 /* cannot transfer to destroyed coros, skip and look for next */
1434 if (expect_false (ta->next->flags & CF_DESTROYED))
1435 {
1436 UNLOCK;
1437 SvREFCNT_dec (next_sv);
1438 /* coro_nready is already taken care of by destroy */
1439 continue;
1440 }
1441
1442 --coro_nready;
1443 UNLOCK;
1444 break;
1445 }
1446
1447 /* free this only after the transfer */
1448 prev_sv = SvRV (coro_current);
1449 ta->prev = SvSTATE (prev_sv);
1450 TRANSFER_CHECK (*ta);
1451 assert (ta->next->flags & CF_READY);
1452 ta->next->flags &= ~CF_READY;
1453 SvRV_set (coro_current, next_sv);
1454
1455 LOCK;
1456 free_coro_mortal (aTHX);
1457 coro_mortal = prev_sv;
1458 UNLOCK;
1459}
863 1460
864static void 1461static void
865coro_enq (pTHX_ SV *sv) 1462prepare_cede (pTHX_ struct transfer_args *ta)
866{ 1463{
867 if (SvTYPE (sv) == SVt_PVHV) 1464 api_ready (coro_current);
868 { 1465 prepare_schedule (aTHX_ ta);
869 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1466}
870 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
871 1467
872 prio = prio > PRIO_MAX ? PRIO_MAX 1468static int
873 : prio < PRIO_MIN ? PRIO_MIN 1469prepare_cede_notself (pTHX_ struct transfer_args *ta)
874 : prio; 1470{
875 1471 if (coro_nready)
876 av_push (coro_ready [prio - PRIO_MIN], sv); 1472 {
877 coro_nready++; 1473 SV *prev = SvRV (coro_current);
878 1474 prepare_schedule (aTHX_ ta);
1475 api_ready (prev);
879 return; 1476 return 1;
880 }
881
882 croak ("Coro::ready tried to enqueue something that is not a coroutine");
883}
884
885static SV *
886coro_deq (pTHX_ int min_prio)
887{
888 int prio = PRIO_MAX - PRIO_MIN;
889
890 min_prio -= PRIO_MIN;
891 if (min_prio < 0)
892 min_prio = 0;
893
894 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
895 if (av_len (coro_ready[prio]) >= 0)
896 {
897 coro_nready--;
898 return av_shift (coro_ready[prio]);
899 } 1477 }
900 1478 else
901 return 0; 1479 return 0;
902}
903
904static void
905api_ready (SV *coro)
906{
907 dTHX;
908
909 if (SvROK (coro))
910 coro = SvRV (coro);
911
912 LOCK;
913 coro_enq (aTHX_ SvREFCNT_inc (coro));
914 UNLOCK;
915} 1480}
916 1481
917static void 1482static void
918api_schedule (void) 1483api_schedule (void)
919{ 1484{
920 dTHX; 1485 dTHX;
1486 struct transfer_args ta;
921 1487
922 SV *prev, *next; 1488 prepare_schedule (aTHX_ &ta);
1489 TRANSFER (ta, 1);
1490}
923 1491
924 LOCK; 1492static int
1493api_cede (void)
1494{
1495 dTHX;
1496 struct transfer_args ta;
925 1497
926 prev = SvRV (GvSV (coro_current)); 1498 prepare_cede (aTHX_ &ta);
927 next = coro_deq (aTHX_ PRIO_MIN);
928 1499
929 if (!next) 1500 if (expect_true (ta.prev != ta.next))
930 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1501 {
1502 TRANSFER (ta, 1);
1503 return 1;
1504 }
1505 else
1506 return 0;
1507}
931 1508
932 /* free this only after the transfer */ 1509static int
933 coro_mortal = prev; 1510api_cede_notself (void)
934 SV_CORO (prev, "Coro::schedule"); 1511{
1512 dTHX;
1513 struct transfer_args ta;
935 1514
936 SvRV (GvSV (coro_current)) = next; 1515 if (prepare_cede_notself (aTHX_ &ta))
937 1516 {
938 SV_CORO (next, "Coro::schedule"); 1517 TRANSFER (ta, 1);
939 1518 return 1;
940 UNLOCK; 1519 }
941 1520 else
942 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1521 return 0;
943 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
944} 1522}
945 1523
946static void 1524static void
947api_cede (void) 1525api_trace (SV *coro_sv, int flags)
948{ 1526{
949 dTHX; 1527 dTHX;
1528 struct coro *coro = SvSTATE (coro_sv);
950 1529
951 LOCK; 1530 if (flags & CC_TRACE)
952 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1531 {
953 UNLOCK; 1532 if (!coro->cctx)
1533 coro->cctx = cctx_new ();
1534 else if (!(coro->cctx->flags & CC_TRACE))
1535 croak ("cannot enable tracing on coroutine with custom stack");
954 1536
955 api_schedule (); 1537 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
956} 1538 }
1539 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1540 {
1541 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
957 1542
1543 if (coro->flags & CF_RUNNING)
1544 PL_runops = RUNOPS_DEFAULT;
1545 else
1546 coro->slot->runops = RUNOPS_DEFAULT;
1547 }
1548}
1549
958MODULE = Coro::State PACKAGE = Coro::State 1550MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
959 1551
960PROTOTYPES: ENABLE 1552PROTOTYPES: DISABLE
961 1553
962BOOT: 1554BOOT:
963{ /* {} necessary for stoopid perl-5.6.x */ 1555{
964#ifdef USE_ITHREADS 1556#ifdef USE_ITHREADS
965 MUTEX_INIT (&coro_mutex); 1557 MUTEX_INIT (&coro_mutex);
966#endif 1558#endif
1559 BOOT_PAGESIZE;
967 1560
968 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1561 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
969 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1562 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1563
1564 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1565 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1566 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1567 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1568
1569 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1570 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1571 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1572
970 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1573 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971 1574
972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1575 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1576 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1577 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
975 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1578 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976 1579
977 main_mainstack = PL_mainstack; 1580 main_mainstack = PL_mainstack;
1581 main_top_env = PL_top_env;
1582
1583 while (main_top_env->je_prev)
1584 main_top_env = main_top_env->je_prev;
978 1585
979 coroapi.ver = CORO_API_VERSION; 1586 coroapi.ver = CORO_API_VERSION;
1587 coroapi.rev = CORO_API_REVISION;
980 coroapi.transfer = api_transfer; 1588 coroapi.transfer = api_transfer;
981}
982 1589
983Coro::State 1590 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
984_newprocess(args) 1591}
985 SV * args 1592
986 PROTOTYPE: $ 1593SV *
1594new (char *klass, ...)
987 CODE: 1595 CODE:
988 Coro__State coro; 1596{
1597 struct coro *coro;
1598 MAGIC *mg;
1599 HV *hv;
1600 int i;
989 1601
990 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991 croak ("Coro::State::_newprocess expects an arrayref");
992
993 Newz (0, coro, 1, struct coro); 1602 Newz (0, coro, 1, struct coro);
1603 coro->args = newAV ();
1604 coro->flags = CF_NEW;
994 1605
995 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1606 if (coro_first) coro_first->prev = coro;
996 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1607 coro->next = coro_first;
997 /*coro->stack = 0;*/ 1608 coro_first = coro;
998 1609
999 /* same as JMPENV_BOOTSTRAP */ 1610 coro->hv = hv = newHV ();
1000 /* we might be able to recycle start_env, but safe is safe */ 1611 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1001 /*Zero(&coro->start_env, 1, JMPENV);*/ 1612 mg->mg_flags |= MGf_DUP;
1002 coro->start_env.je_ret = -1; 1613 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1003 coro->start_env.je_mustcatch = TRUE;
1004 1614
1005 RETVAL = coro; 1615 av_extend (coro->args, items - 1);
1616 for (i = 1; i < items; i++)
1617 av_push (coro->args, newSVsv (ST (i)));
1618}
1006 OUTPUT: 1619 OUTPUT:
1007 RETVAL 1620 RETVAL
1008 1621
1622# these not obviously related functions are all rolled into the same xs
1623# function to increase chances that they all will call transfer with the same
1624# stack offset
1009void 1625void
1010transfer(prev, next, flags) 1626_set_stacklevel (...)
1011 SV *prev 1627 ALIAS:
1012 SV *next 1628 Coro::State::transfer = 1
1013 int flags 1629 Coro::schedule = 2
1014 PROTOTYPE: @ 1630 Coro::cede = 3
1631 Coro::cede_notself = 4
1015 CODE: 1632 CODE:
1633{
1634 struct transfer_args ta;
1635
1016 PUTBACK; 1636 PUTBACK;
1017 SV_CORO (next, "Coro::transfer"); 1637 switch (ix)
1018 SV_CORO (prev, "Coro::transfer"); 1638 {
1019 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1639 case 0:
1640 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1641 ta.next = 0;
1642 break;
1643
1644 case 1:
1645 if (items != 2)
1646 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1647
1648 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1649 break;
1650
1651 case 2:
1652 prepare_schedule (aTHX_ &ta);
1653 break;
1654
1655 case 3:
1656 prepare_cede (aTHX_ &ta);
1657 break;
1658
1659 case 4:
1660 if (!prepare_cede_notself (aTHX_ &ta))
1661 XSRETURN_EMPTY;
1662
1663 break;
1664 }
1020 SPAGAIN; 1665 SPAGAIN;
1021 1666
1667 BARRIER;
1668 PUTBACK;
1669 TRANSFER (ta, 0);
1670 SPAGAIN; /* might be the sp of a different coroutine now */
1671 /* be extra careful not to ever do anything after TRANSFER */
1672}
1673
1674bool
1675_destroy (SV *coro_sv)
1676 CODE:
1677 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1678 OUTPUT:
1679 RETVAL
1680
1022void 1681void
1023DESTROY(coro)
1024 Coro::State coro
1025 CODE:
1026
1027 if (coro->mainstack && coro->mainstack != main_mainstack)
1028 {
1029 struct coro temp;
1030
1031 PUTBACK;
1032 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1033 LOAD (aTHX_ coro);
1034 SPAGAIN;
1035
1036 destroy_stacks (aTHX);
1037
1038 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039 SPAGAIN;
1040
1041 coro->mainstack = 0;
1042 }
1043
1044 deallocate_stack (coro);
1045 SvREFCNT_dec (coro->args);
1046 Safefree (coro);
1047
1048void
1049_exit(code) 1682_exit (code)
1050 int code 1683 int code
1051 PROTOTYPE: $ 1684 PROTOTYPE: $
1052 CODE: 1685 CODE:
1053 _exit (code); 1686 _exit (code);
1054 1687
1055MODULE = Coro::State PACKAGE = Coro::Cont 1688int
1689cctx_stacksize (int new_stacksize = 0)
1690 CODE:
1691 RETVAL = coro_stacksize;
1692 if (new_stacksize)
1693 coro_stacksize = new_stacksize;
1694 OUTPUT:
1695 RETVAL
1056 1696
1057# this is slightly dirty (should expose a c-level api) 1697int
1698cctx_count ()
1699 CODE:
1700 RETVAL = cctx_count;
1701 OUTPUT:
1702 RETVAL
1703
1704int
1705cctx_idle ()
1706 CODE:
1707 RETVAL = cctx_idle;
1708 OUTPUT:
1709 RETVAL
1058 1710
1059void 1711void
1060yield(...) 1712list ()
1061 PROTOTYPE: @ 1713 PPCODE:
1714{
1715 struct coro *coro;
1716 for (coro = coro_first; coro; coro = coro->next)
1717 if (coro->hv)
1718 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1719}
1720
1721void
1722call (Coro::State coro, SV *coderef)
1723 ALIAS:
1724 eval = 1
1725 CODE:
1726{
1727 if (coro->mainstack)
1728 {
1729 struct coro temp;
1730
1731 if (!(coro->flags & CF_RUNNING))
1732 {
1733 PUTBACK;
1734 save_perl (aTHX_ &temp);
1735 load_perl (aTHX_ coro);
1736 }
1737
1738 {
1739 dSP;
1740 ENTER;
1741 SAVETMPS;
1742 PUTBACK;
1743 PUSHSTACK;
1744 PUSHMARK (SP);
1745
1746 if (ix)
1747 eval_sv (coderef, 0);
1748 else
1749 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1750
1751 POPSTACK;
1752 SPAGAIN;
1753 FREETMPS;
1754 LEAVE;
1755 PUTBACK;
1756 }
1757
1758 if (!(coro->flags & CF_RUNNING))
1759 {
1760 save_perl (aTHX_ coro);
1761 load_perl (aTHX_ &temp);
1762 SPAGAIN;
1763 }
1764 }
1765}
1766
1767SV *
1768is_ready (Coro::State coro)
1769 PROTOTYPE: $
1770 ALIAS:
1771 is_ready = CF_READY
1772 is_running = CF_RUNNING
1773 is_new = CF_NEW
1774 is_destroyed = CF_DESTROYED
1775 CODE:
1776 RETVAL = boolSV (coro->flags & ix);
1777 OUTPUT:
1778 RETVAL
1779
1780void
1781api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1782
1783SV *
1784has_stack (Coro::State coro)
1785 PROTOTYPE: $
1786 CODE:
1787 RETVAL = boolSV (!!coro->cctx);
1788 OUTPUT:
1789 RETVAL
1790
1791int
1792is_traced (Coro::State coro)
1793 PROTOTYPE: $
1794 CODE:
1795 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1796 OUTPUT:
1797 RETVAL
1798
1799IV
1800rss (Coro::State coro)
1801 PROTOTYPE: $
1802 ALIAS:
1803 usecount = 1
1062 CODE: 1804 CODE:
1063 SV *yieldstack; 1805 switch (ix)
1064 SV *sv; 1806 {
1065 AV *defav = GvAV (PL_defgv); 1807 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1066 struct coro *prev, *next; 1808 case 1: RETVAL = coro->usecount; break;
1067
1068 yieldstack = *hv_fetch (
1069 (HV *)SvRV (GvSV (coro_current)),
1070 "yieldstack", sizeof ("yieldstack") - 1,
1071 0 1809 }
1072 ); 1810 OUTPUT:
1811 RETVAL
1073 1812
1074 /* set up @_ -- ugly */ 1813void
1075 av_clear (defav); 1814force_cctx ()
1076 av_fill (defav, items - 1); 1815 CODE:
1077 while (items--) 1816 struct coro *coro = SvSTATE (coro_current);
1078 av_store (defav, items, SvREFCNT_inc (ST(items))); 1817 coro->cctx->idle_sp = 0;
1079
1080 sv = av_pop ((AV *)SvRV (yieldstack));
1081 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083 SvREFCNT_dec (sv);
1084
1085 transfer (aTHX_ prev, next, 0);
1086 1818
1087MODULE = Coro::State PACKAGE = Coro 1819MODULE = Coro::State PACKAGE = Coro
1088 1820
1089# this is slightly dirty (should expose a c-level api)
1090
1091BOOT: 1821BOOT:
1092{ 1822{
1093 int i; 1823 int i;
1824
1825 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1826 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1827 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1828
1829 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1830 SvREADONLY_on (coro_current);
1831
1094 HV *stash = gv_stashpv ("Coro", TRUE); 1832 coro_stash = gv_stashpv ("Coro", TRUE);
1095 1833
1096 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1834 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1835 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1836 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1837 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1838 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1839 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102
1103 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1104 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1105 1840
1106 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1841 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107 coro_ready[i] = newAV (); 1842 coro_ready[i] = newAV ();
1108 1843
1109 { 1844 {
1110 SV *sv = perl_get_sv("Coro::API", 1); 1845 SV *sv = perl_get_sv ("Coro::API", TRUE);
1846 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1111 1847
1112 coroapi.schedule = api_schedule; 1848 coroapi.schedule = api_schedule;
1113 coroapi.cede = api_cede; 1849 coroapi.cede = api_cede;
1850 coroapi.cede_notself = api_cede_notself;
1114 coroapi.ready = api_ready; 1851 coroapi.ready = api_ready;
1852 coroapi.is_ready = api_is_ready;
1115 coroapi.nready = &coro_nready; 1853 coroapi.nready = &coro_nready;
1116 coroapi.current = coro_current; 1854 coroapi.current = coro_current;
1117 1855
1118 GCoroAPI = &coroapi; 1856 GCoroAPI = &coroapi;
1119 sv_setiv(sv, (IV)&coroapi); 1857 sv_setiv (sv, (IV)&coroapi);
1120 SvREADONLY_on(sv); 1858 SvREADONLY_on (sv);
1121 } 1859 }
1122} 1860}
1123 1861
1124#if !PERL_MICRO
1125
1126void 1862void
1127ready(self) 1863_set_current (SV *current)
1128 SV * self
1129 PROTOTYPE: $ 1864 PROTOTYPE: $
1130 CODE: 1865 CODE:
1131 api_ready (self); 1866 SvREFCNT_dec (SvRV (coro_current));
1132 1867 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1133#endif
1134 1868
1135int 1869int
1870prio (Coro::State coro, int newprio = 0)
1871 ALIAS:
1872 nice = 1
1873 CODE:
1874{
1875 RETVAL = coro->prio;
1876
1877 if (items > 1)
1878 {
1879 if (ix)
1880 newprio = coro->prio - newprio;
1881
1882 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1883 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1884
1885 coro->prio = newprio;
1886 }
1887}
1888 OUTPUT:
1889 RETVAL
1890
1891SV *
1892ready (SV *self)
1893 PROTOTYPE: $
1894 CODE:
1895 RETVAL = boolSV (api_ready (self));
1896 OUTPUT:
1897 RETVAL
1898
1899int
1136nready(...) 1900nready (...)
1137 PROTOTYPE: 1901 PROTOTYPE:
1138 CODE: 1902 CODE:
1139 RETVAL = coro_nready; 1903 RETVAL = coro_nready;
1140 OUTPUT: 1904 OUTPUT:
1141 RETVAL 1905 RETVAL
1142 1906
1143void 1907void
1144schedule(...) 1908throw (Coro::State self, SV *throw = &PL_sv_undef)
1909 PROTOTYPE: $;$
1910 CODE:
1911 SvREFCNT_dec (self->throw);
1912 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1913
1914void
1915swap_defsv (Coro::State self)
1145 PROTOTYPE: 1916 PROTOTYPE: $
1917 ALIAS:
1918 swap_defav = 1
1919 CODE:
1920 if (!self->slot)
1921 croak ("cannot swap state with coroutine that has no saved state");
1922 else
1923 {
1924 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1925 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1926
1927 SV *tmp = *src; *src = *dst; *dst = tmp;
1928 }
1929
1930# for async_pool speedup
1931void
1932_pool_1 (SV *cb)
1146 CODE: 1933 CODE:
1147 api_schedule (); 1934{
1935 struct coro *coro = SvSTATE (coro_current);
1936 HV *hv = (HV *)SvRV (coro_current);
1937 AV *defav = GvAV (PL_defgv);
1938 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1939 AV *invoke_av;
1940 int i, len;
1941
1942 if (!invoke)
1943 {
1944 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1945 croak ("\3async_pool terminate\2\n");
1946 }
1947
1948 SvREFCNT_dec (coro->saved_deffh);
1949 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1950
1951 hv_store (hv, "desc", sizeof ("desc") - 1,
1952 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1953
1954 invoke_av = (AV *)SvRV (invoke);
1955 len = av_len (invoke_av);
1956
1957 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1958
1959 if (len > 0)
1960 {
1961 av_fill (defav, len - 1);
1962 for (i = 0; i < len; ++i)
1963 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1964 }
1965
1966 SvREFCNT_dec (invoke);
1967}
1148 1968
1149void 1969void
1150cede(...) 1970_pool_2 (SV *cb)
1151 PROTOTYPE:
1152 CODE: 1971 CODE:
1153 api_cede (); 1972{
1973 struct coro *coro = SvSTATE (coro_current);
1154 1974
1975 sv_setsv (cb, &PL_sv_undef);
1976
1977 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1978 coro->saved_deffh = 0;
1979
1980 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1981 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1982 {
1983 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1984 croak ("\3async_pool terminate\2\n");
1985 }
1986
1987 av_clear (GvAV (PL_defgv));
1988 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1989 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1990
1991 coro->prio = 0;
1992
1993 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1994 api_trace (coro_current, 0);
1995
1996 av_push (av_async_pool, newSVsv (coro_current));
1997}
1998
1999
2000MODULE = Coro::State PACKAGE = Coro::AIO
2001
2002SV *
2003_get_state ()
2004 CODE:
2005{
2006 struct io_state *data;
2007
2008 RETVAL = newSV (sizeof (struct io_state));
2009 data = (struct io_state *)SvPVX (RETVAL);
2010 SvCUR_set (RETVAL, sizeof (struct io_state));
2011 SvPOK_only (RETVAL);
2012
2013 data->errorno = errno;
2014 data->laststype = PL_laststype;
2015 data->laststatval = PL_laststatval;
2016 data->statcache = PL_statcache;
2017}
2018 OUTPUT:
2019 RETVAL
2020
2021void
2022_set_state (char *data_)
2023 PROTOTYPE: $
2024 CODE:
2025{
2026 struct io_state *data = (void *)data_;
2027
2028 errno = data->errorno;
2029 PL_laststype = data->laststype;
2030 PL_laststatval = data->laststatval;
2031 PL_statcache = data->statcache;
2032}
2033

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