ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.73 by root, Sat Feb 4 06:01:13 2006 UTC vs.
Revision 1.237 by root, Fri May 23 00:27:06 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#if PERL_VERSION < 6 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# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# 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
42# endif
43#else
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)
12# ifndef PL_ppaddr 65# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
14# endif 67# endif
15# ifndef call_sv 68# ifndef call_sv
16# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 80# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
29# endif 82# endif
30#endif 83#endif
31 84
32#include <errno.h> 85/* 5.8.8 */
33#include <signal.h> 86#ifndef GV_NOTQUAL
34 87# define GV_NOTQUAL 0
35#ifdef HAVE_MMAP
36# include <unistd.h>
37# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS
39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
41# else
42# undef HAVE_MMAP
43# endif
44# endif 88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
45#endif 91#endif
46 92
47#define SUB_INIT "Coro::State::initialize" 93/* 5.11 */
48#define UCORO_STATE "_coro_state" 94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
49 97
50/* The next macro should declare a variable stacklevel that contains and approximation 98/* 5.8.7 */
51 * to the current C stack pointer. Its property is that it changes with each call 99#ifndef SvRV_set
52 * 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
53#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
54 120
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
56 122
57#define labs(l) ((l) >= 0 ? (l) : -(l)) 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))
58 137
59#include "CoroAPI.h" 138#include "CoroAPI.h"
60 139
61#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
… …
65#else 144#else
66# define LOCK (void)0 145# define LOCK (void)0
67# define UNLOCK (void)0 146# define UNLOCK (void)0
68#endif 147#endif
69 148
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;
70static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
72static HV *coro_state_stash; 162static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
76 164
77/* this is actually not only the c stack but also c registers etc... */ 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
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
191/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx {
193 struct coro_cctx *next;
194
195 /* the stack */
196 void *sptr;
197 size_t ssize;
198
199 /* cpu state */
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env;
203 coro_context cctx;
204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
78typedef struct { 219typedef struct {
79 int refcnt; /* pointer reference counter */ 220 SV *defsv;
80 int usecnt; /* shared by how many coroutines */ 221 AV *defav;
81 int gencnt; /* generation counter */ 222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
82 228
83 coro_context cctx; 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
84 230
85 void *sptr; 231/* this is a structure representing a perl-level coroutine */
86 long ssize; /* positive == mmap, otherwise malloc */
87} coro_stack;
88
89struct coro { 232struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233 /* the c coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 234 coro_cctx *cctx;
92 235
93 /* the optional C context */ 236 /* process data */
94 coro_stack *stack;
95 void *cursp;
96 int gencnt;
97
98 /* optionally saved, might be zero */
99 AV *defav;
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 237 AV *mainstack;
111 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 239
138 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 241 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
244
245 /* statistics */
246 int usecount; /* number of transfers to this coro */
247
248 /* coro process data */
249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
140}; 257};
141 258
142typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
144 261
145/* mostly copied from op.c:cv_clone2 */ 262/** Coro ********************************************************************/
146STATIC AV * 263
147clone_padlist (pTHX_ AV *protopadlist) 264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
148{ 282{
149 AV *av; 283#if PERL_VERSION_ATLEAST (5,10,0)
150 I32 ix; 284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 285 get_sv (name, create);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 286#endif
153 SV **pname = AvARRAY (protopad_name); 287 return get_sv (name, create);
154 SV **ppad = AvARRAY (protopad); 288}
155 I32 fname = AvFILLp (protopad_name); 289
156 I32 fpad = AvFILLp (protopad); 290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
310static AV *
311coro_clone_padlist (pTHX_ CV *cv)
312{
313 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 314 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 315
168 newpadlist = newAV (); 316 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist);
325
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *) newpad); 327 av_store (newpadlist, 1, (SV *)newpad);
172
173 av = newAV (); /* will be @_ */
174 av_extend (av, 0);
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177
178 for (ix = fpad; ix > 0; ix--)
179 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182 if (namesv && namesv != &PL_sv_undef)
183 {
184 char *name = SvPVX (namesv); /* XXX */
185
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187 { /* lexical from outside? */
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201
202#ifdef SvPADBUSY
203 if (!SvPADBUSY (sv))
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221
222#if 0 /* return -ENOTUNDERSTOOD */
223 /* Now that vars are all in place, clone nested closures. */
224
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241 328
242 return newpadlist; 329 return newpadlist;
243} 330}
244 331
245STATIC void 332static void
246free_padlist (pTHX_ AV *padlist) 333free_padlist (pTHX_ AV *padlist)
247{ 334{
248 /* may be during global destruction */ 335 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
250 { 337 {
… …
264 351
265 SvREFCNT_dec ((SV*)padlist); 352 SvREFCNT_dec ((SV*)padlist);
266 } 353 }
267} 354}
268 355
269STATIC int 356static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 357coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 358{
272 AV *padlist; 359 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
274 361
275 /* casting is fun. */ 362 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
278 365
279 SvREFCNT_dec (av); 366 return 0;
280} 367}
281 368
282#define PERL_MAGIC_coro PERL_MAGIC_ext 369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
283 371
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 372static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0,
374 coro_cv_free
375};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
285 412
286/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
287STATIC void 414static void
288get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
289{ 416{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
291 419
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 422 else
423 {
424#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */
426 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp);
430#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
432#endif
433 }
296} 434}
297 435
298STATIC void 436static void
299put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
300{ 438{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
302 441
303 if (!mg) 442 if (expect_false (!mg))
304 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV ();
309 }
310 444
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
312}
313 446
314#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
315#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
316 449
317#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
319 452
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
321 454
322static void 455static void
323load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
324{ 457{
325 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 459 c->slot = 0;
327 460
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 462
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
468 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h"
470 #undef VAR
363 471
364 { 472 {
365 dSP; 473 dSP;
474
366 CV *cv; 475 CV *cv;
367 476
368 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
370 { 479 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
377 } 482 CvPADLIST (cv) = (AV *)POPs;
378
379 ++CvDEPTH(cv);
380 } 483 }
381 484
382 PUTBACK; 485 PUTBACK;
383 } 486 }
384} 487}
385 488
386static void 489static void
387save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
388{ 491{
389 { 492 {
390 dSP; 493 dSP;
391 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
395 /* 498 /*
396 * the worst thing you can imagine happens first - we have to save 499 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
398 */ 501 */
399 502
400 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
402 for (;;) 505 for (;;)
403 { 506 {
404 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
405 { 508 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
407 510
408 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
409 { 512 {
410 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
411 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
412 { 516 {
413 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
424 521
522 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 523 get_padlist (aTHX_ cv);
426 } 524 }
427 } 525 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 526 }
437 527
438 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 529 break;
440 530
441 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
444 } 534 }
445 535
446 PUTBACK; 536 PUTBACK;
447 } 537 }
448 538
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 550
453 c->dowarn = PL_dowarn;
454 c->in_eval = PL_in_eval;
455
456 c->curstackinfo = PL_curstackinfo;
457 c->curstack = PL_curstack;
458 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 552
460 c->op = PL_op; 553 {
461 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 555
463 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
464 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
465 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
466 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
467 c->tmps_floor = PL_tmps_floor; 560
468 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
469 c->tmps_max = PL_tmps_max; 562 # include "state.h"
470 c->markstack = PL_markstack; 563 #undef VAR
471 c->markstack_ptr = PL_markstack_ptr; 564 }
472 c->markstack_max = PL_markstack_max;
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif
484 c->curpm = PL_curpm;
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 565}
488 566
489/* 567/*
490 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
494 */ 572 */
495STATIC void 573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
576static void
496coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
497{ 578{
498 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 583
505 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 587
509 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 591 PL_tmps_max = 32;
513 592
514 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
517 596
518#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
520#endif 599#endif
521 600
522 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
524 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
525 604
526 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
528 PL_savestack_max = 96; 607 PL_savestack_max = 24;
529 608
530#if PERL_VERSION < 9 609#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 612 PL_retstack_max = 4;
534#endif 613#endif
535
536 UNLOCK;
537} 614}
615#endif
538 616
539/* 617/*
540 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
541 */ 619 */
542STATIC void 620static void
543destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
544{ 622{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
558 625
559 while (PL_curstackinfo) 626 while (PL_curstackinfo)
560 { 627 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
562 629
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 632
575 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 635 PL_curstackinfo = p;
578 } 636 }
579 637
580 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 639 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
583 Safefree (PL_savestack); 641 Safefree (PL_savestack);
584#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 643 Safefree (PL_retstack);
586#endif 644#endif
587} 645}
588 646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688
689/*
690 * This overrides the default magic get method of %SIG elements.
691 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
692 * and instead of tryign to save and restore the hash elements, we just provide
693 * readback here.
694 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
695 * not expecting this to actually change the hook. This is a potential problem
696 * when a schedule happens then, but we ignore this.
697 */
698static int
699coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
700{
701 const char *s = MgPV_nolen_const (mg);
702
703 if (*s == '_')
704 {
705 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
706 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
707 }
708
709 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
710}
711
712static int
713coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
714{
715 const char *s = MgPV_nolen_const (mg);
716
717 if (*s == '_')
718 {
719 SV **svp = 0;
720
721 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
722 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
723
724 if (svp)
725 {
726 SV *old = *svp;
727 *svp = newSVsv (sv);
728 SvREFCNT_dec (old);
729 return 0;
730 }
731 }
732
733 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
734}
735
589static void 736static void
590allocate_stack (Coro__State ctx, int alloc) 737coro_setup (pTHX_ struct coro *coro)
591{
592 coro_stack *stack;
593
594 New (0, stack, 1, coro_stack);
595
596 stack->refcnt = 1;
597 stack->usecnt = 1;
598 stack->gencnt = ctx->gencnt = 0;
599
600 if (alloc)
601 {
602#if HAVE_MMAP
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 if (stack->sptr == (void *)-1)
606#endif
607 {
608 /*FIXME*//*D*//* reasonable stack size! */
609 stack->ssize = - (STACKSIZE * sizeof (long));
610 New (0, stack->sptr, STACKSIZE, long);
611 }
612 }
613 else
614 stack->sptr = 0;
615
616 ctx->stack = stack;
617}
618
619static void
620deallocate_stack (Coro__State ctx)
621{
622 coro_stack *stack = ctx->stack;
623
624 ctx->stack = 0;
625
626 if (stack)
627 {
628 if (!--stack->refcnt)
629 {
630#ifdef HAVE_MMAP
631 if (stack->ssize > 0 && stack->sptr)
632 munmap (stack->sptr, stack->ssize);
633 else
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 }
639 else if (ctx->gencnt == stack->gencnt)
640 --stack->usecnt;
641 }
642}
643
644static void
645setup_coro (void *arg)
646{ 738{
647 /* 739 /*
648 * emulate part of the perl startup here. 740 * emulate part of the perl startup here.
649 */ 741 */
650 dTHX;
651 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654
655 coro_init_stacks (aTHX); 742 coro_init_stacks (aTHX);
656 /*PL_curcop = 0;*/ 743
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 744 PL_runops = RUNOPS_DEFAULT;
745 PL_curcop = &PL_compiling;
746 PL_in_eval = EVAL_NULL;
747 PL_comppad = 0;
748 PL_curpm = 0;
749 PL_curpad = 0;
750 PL_localizing = 0;
751 PL_dirty = 0;
752 PL_restartop = 0;
753#if PERL_VERSION_ATLEAST (5,10,0)
754 PL_parser = 0;
755#endif
756
757 /* recreate the die/warn hooks */
758 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
759 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
760
761 GvSV (PL_defgv) = newSV (0);
762 GvAV (PL_defgv) = coro->args; coro->args = 0;
763 GvSV (PL_errgv) = newSV (0);
764 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
765 PL_rs = newSVsv (GvSV (irsgv));
766 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
767
768 {
769 dSP;
770 LOGOP myop;
771
772 Zero (&myop, 1, LOGOP);
773 myop.op_next = Nullop;
774 myop.op_flags = OPf_WANT_VOID;
775
776 PUSHMARK (SP);
777 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
778 PUTBACK;
779 PL_op = (OP *)&myop;
780 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
781 SPAGAIN;
782 }
783
784 /* this newly created coroutine might be run on an existing cctx which most
785 * likely was suspended in set_stacklevel, called from entersub.
786 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
787 * so we ENTER here for symmetry
788 */
789 ENTER;
790}
791
792static void
793coro_destroy (pTHX_ struct coro *coro)
794{
795 if (!IN_DESTRUCT)
796 {
797 /* restore all saved variables and stuff */
798 LEAVE_SCOPE (0);
799 assert (PL_tmps_floor == -1);
800
801 /* free all temporaries */
802 FREETMPS;
803 assert (PL_tmps_ix == -1);
804
805 /* unwind all extra stacks */
806 POPSTACK_TO (PL_mainstack);
807
808 /* unwind main stack */
809 dounwind (-1);
810 }
811
812 SvREFCNT_dec (GvSV (PL_defgv));
658 SvREFCNT_dec (GvAV (PL_defgv)); 813 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 814 SvREFCNT_dec (GvSV (PL_errgv));
815 SvREFCNT_dec (PL_defoutgv);
816 SvREFCNT_dec (PL_rs);
817 SvREFCNT_dec (GvSV (irsgv));
660 818
661 SPAGAIN; 819 SvREFCNT_dec (PL_diehook);
820 SvREFCNT_dec (PL_warnhook);
821
822 SvREFCNT_dec (coro->saved_deffh);
823 SvREFCNT_dec (coro->throw);
662 824
663 if (ctx->stack) 825 coro_destroy_stacks (aTHX);
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP);
668 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671 if (SvTRUE (ERRSV))
672 croak (NULL);
673 else
674 croak ("FATAL: CCTXT coroutine returned!");
675 }
676 else
677 {
678 UNOP myop;
679
680 PL_op = (OP *)&myop;
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701} 826}
702 827
703static void 828static void
704continue_coro (void *arg) 829free_coro_mortal (pTHX)
705{ 830{
706 /* 831 if (expect_true (coro_mortal))
707 * this is a _very_ stripped down perl interpreter ;) 832 {
708 */ 833 SvREFCNT_dec (coro_mortal);
709 dTHX; 834 coro_mortal = 0;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 { 835 }
729 if (next->mainstack) 836}
837
838static int
839runops_trace (pTHX)
840{
841 COP *oldcop = 0;
842 int oldcxix = -2;
843 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
844 coro_cctx *cctx = coro->cctx;
845
846 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
847 {
848 PERL_ASYNC_CHECK ();
849
850 if (cctx->flags & CC_TRACE_ALL)
730 { 851 {
731 LOCK; 852 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
732 SAVE (prev, flags);
733 LOAD (next);
734 UNLOCK;
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 853 {
743 if (!prev->stack) 854 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744 allocate_stack (prev, 0); 855 SV **bot, **top;
745 else if (prev->cursp != stacklevel 856 AV *av = newAV (); /* return values */
746 && prev->stack->usecnt > 1) 857 SV **cb;
858 dSP;
859
860 GV *gv = CvGV (cx->blk_sub.cv);
861 SV *fullname = sv_2mortal (newSV (0));
862 if (isGV (gv))
863 gv_efullname3 (fullname, gv, 0);
864
865 bot = PL_stack_base + cx->blk_oldsp + 1;
866 top = cx->blk_gimme == G_ARRAY ? SP + 1
867 : cx->blk_gimme == G_SCALAR ? bot + 1
868 : bot;
869
870 av_extend (av, top - bot);
871 while (bot < top)
872 av_push (av, SvREFCNT_inc (*bot++));
873
874 PL_runops = RUNOPS_DEFAULT;
875 ENTER;
876 SAVETMPS;
877 EXTEND (SP, 3);
878 PUSHMARK (SP);
879 PUSHs (&PL_sv_no);
880 PUSHs (fullname);
881 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
882 PUTBACK;
883 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
884 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
885 SPAGAIN;
886 FREETMPS;
887 LEAVE;
888 PL_runops = runops_trace;
889 }
890
891 if (oldcop != PL_curcop)
892 {
893 oldcop = PL_curcop;
894
895 if (PL_curcop != &PL_compiling)
747 { 896 {
748 prev->gencnt = ++prev->stack->gencnt; 897 SV **cb;
749 prev->stack->usecnt = 1;
750 }
751 898
752 /* has our stack been invalidated? */ 899 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 { 900 {
755 deallocate_stack (next); 901 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
756 allocate_stack (next, 1); 902
757 coro_create (&(next->stack->cctx), 903 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
758 continue_coro, (void *)next, 904 {
759 next->stack->sptr, labs (next->stack->ssize)); 905 runops_proc_t old_runops = PL_runops;
906 dSP;
907 GV *gv = CvGV (cx->blk_sub.cv);
908 SV *fullname = sv_2mortal (newSV (0));
909
910 if (isGV (gv))
911 gv_efullname3 (fullname, gv, 0);
912
913 PL_runops = RUNOPS_DEFAULT;
914 ENTER;
915 SAVETMPS;
916 EXTEND (SP, 3);
917 PUSHMARK (SP);
918 PUSHs (&PL_sv_yes);
919 PUSHs (fullname);
920 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
921 PUTBACK;
922 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
923 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
924 SPAGAIN;
925 FREETMPS;
926 LEAVE;
927 PL_runops = runops_trace;
928 }
929
930 oldcxix = cxstack_ix;
760 } 931 }
761 932
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 933 if (cctx->flags & CC_TRACE_LINE)
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 }
766 else
767 next->cursp = stacklevel;
768 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else
772 {
773 LOCK;
774 SAVE (prev, -1); /* first get rid of the old state */
775 UNLOCK;
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 {
779 if (!prev->stack)
780 allocate_stack (prev, 0);
781
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 { 934 {
784 PL_top_env = &next->start_env; 935 dSP;
785 936
786 setup_coro (next); 937 PL_runops = RUNOPS_DEFAULT;
787 next->cursp = stacklevel; 938 ENTER;
788 939 SAVETMPS;
789 prev->stack->refcnt++; 940 EXTEND (SP, 3);
790 prev->stack->usecnt++; 941 PL_runops = RUNOPS_DEFAULT;
791 next->stack = prev->stack; 942 PUSHMARK (SP);
792 next->gencnt = prev->gencnt; 943 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
944 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
945 PUTBACK;
946 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
947 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
948 SPAGAIN;
949 FREETMPS;
950 LEAVE;
951 PL_runops = runops_trace;
793 } 952 }
794 else
795 {
796 assert (!next->stack);
797 allocate_stack (next, 1);
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 } 953 }
805 } 954 }
955 }
956 }
957
958 TAINT_NOT;
959 return 0;
960}
961
962/* inject a fake call to Coro::State::_cctx_init into the execution */
963/* _cctx_init should be careful, as it could be called at almost any time */
964/* during execution of a perl program */
965static void NOINLINE
966cctx_prepare (pTHX_ coro_cctx *cctx)
967{
968 dSP;
969 LOGOP myop;
970
971 PL_top_env = &PL_start_env;
972
973 if (cctx->flags & CC_TRACE)
974 PL_runops = runops_trace;
975
976 Zero (&myop, 1, LOGOP);
977 myop.op_next = PL_op;
978 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
979
980 PUSHMARK (SP);
981 EXTEND (SP, 2);
982 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
983 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
984 PUTBACK;
985 PL_op = (OP *)&myop;
986 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
987 SPAGAIN;
988}
989
990/*
991 * this is a _very_ stripped down perl interpreter ;)
992 */
993static void
994cctx_run (void *arg)
995{
996 dTHX;
997
998 /* cctx_run is the alternative tail of transfer(), so unlock here. */
999 UNLOCK;
1000
1001 /* we now skip the entersub that lead to transfer() */
1002 PL_op = PL_op->op_next;
1003
1004 /* inject a fake subroutine call to cctx_init */
1005 cctx_prepare (aTHX_ (coro_cctx *)arg);
1006
1007 /* somebody or something will hit me for both perl_run and PL_restartop */
1008 PL_restartop = PL_op;
1009 perl_run (PL_curinterp);
1010
1011 /*
1012 * If perl-run returns we assume exit() was being called or the coro
1013 * fell off the end, which seems to be the only valid (non-bug)
1014 * reason for perl_run to return. We try to exit by jumping to the
1015 * bootstrap-time "top" top_env, as we cannot restore the "main"
1016 * coroutine as Coro has no such concept
1017 */
1018 PL_top_env = main_top_env;
1019 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1020}
1021
1022static coro_cctx *
1023cctx_new ()
1024{
1025 coro_cctx *cctx;
1026 void *stack_start;
1027 size_t stack_size;
1028
1029 ++cctx_count;
1030
1031 Newz (0, cctx, 1, coro_cctx);
1032
1033#if HAVE_MMAP
1034 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1035 /* mmap supposedly does allocate-on-write for us */
1036 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1037
1038 if (cctx->sptr != (void *)-1)
1039 {
1040# if CORO_STACKGUARD
1041 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1042# endif
1043 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1044 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1045 cctx->flags |= CC_MAPPED;
1046 }
1047 else
1048#endif
1049 {
1050 cctx->ssize = coro_stacksize * (long)sizeof (long);
1051 New (0, cctx->sptr, coro_stacksize, long);
1052
1053 if (!cctx->sptr)
1054 {
1055 perror ("FATAL: unable to allocate stack for coroutine");
1056 _exit (EXIT_FAILURE);
1057 }
1058
1059 stack_start = cctx->sptr;
1060 stack_size = cctx->ssize;
1061 }
1062
1063 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1064 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1065
1066 return cctx;
1067}
1068
1069static void
1070cctx_destroy (coro_cctx *cctx)
1071{
1072 if (!cctx)
1073 return;
1074
1075 --cctx_count;
1076
1077#if CORO_USE_VALGRIND
1078 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1079#endif
1080
1081#if HAVE_MMAP
1082 if (cctx->flags & CC_MAPPED)
1083 munmap (cctx->sptr, cctx->ssize);
1084 else
1085#endif
1086 Safefree (cctx->sptr);
1087
1088 Safefree (cctx);
1089}
1090
1091/* wether this cctx should be destructed */
1092#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1093
1094static coro_cctx *
1095cctx_get (pTHX)
1096{
1097 while (expect_true (cctx_first))
1098 {
1099 coro_cctx *cctx = cctx_first;
1100 cctx_first = cctx->next;
1101 --cctx_idle;
1102
1103 if (expect_true (!CCTX_EXPIRED (cctx)))
1104 return cctx;
1105
1106 cctx_destroy (cctx);
1107 }
1108
1109 return cctx_new ();
1110}
1111
1112static void
1113cctx_put (coro_cctx *cctx)
1114{
1115 /* free another cctx if overlimit */
1116 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1117 {
1118 coro_cctx *first = cctx_first;
1119 cctx_first = first->next;
1120 --cctx_idle;
1121
1122 cctx_destroy (first);
1123 }
1124
1125 ++cctx_idle;
1126 cctx->next = cctx_first;
1127 cctx_first = cctx;
1128}
1129
1130/** coroutine switching *****************************************************/
1131
1132static void
1133transfer_check (pTHX_ struct coro *prev, struct coro *next)
1134{
1135 if (expect_true (prev != next))
1136 {
1137 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1138 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1139
1140 if (expect_false (next->flags & CF_RUNNING))
1141 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1142
1143 if (expect_false (next->flags & CF_DESTROYED))
1144 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1145
1146#if !PERL_VERSION_ATLEAST (5,10,0)
1147 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1148 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1149#endif
1150 }
1151}
1152
1153/* always use the TRANSFER macro */
1154static void NOINLINE
1155transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1156{
1157 dSTACKLEVEL;
1158 static volatile int has_throw;
1159
1160 /* sometimes transfer is only called to set idle_sp */
1161 if (expect_false (!next))
1162 {
1163 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1164 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1165 }
1166 else if (expect_true (prev != next))
1167 {
1168 coro_cctx *prev__cctx;
1169
1170 if (expect_false (prev->flags & CF_NEW))
1171 {
1172 /* create a new empty context */
1173 Newz (0, prev->cctx, 1, coro_cctx);
1174 prev->flags &= ~CF_NEW;
1175 prev->flags |= CF_RUNNING;
1176 }
1177
1178 prev->flags &= ~CF_RUNNING;
1179 next->flags |= CF_RUNNING;
1180
1181 LOCK;
1182
1183 /* first get rid of the old state */
1184 save_perl (aTHX_ prev);
1185
1186 if (expect_false (next->flags & CF_NEW))
1187 {
1188 /* need to start coroutine */
1189 next->flags &= ~CF_NEW;
1190 /* setup coroutine call */
1191 coro_setup (aTHX_ next);
1192 }
806 else 1193 else
1194 load_perl (aTHX_ next);
1195
1196 prev__cctx = prev->cctx;
1197
1198 /* possibly "free" the cctx */
1199 if (expect_true (
1200 prev__cctx->idle_sp == STACKLEVEL
1201 && !(prev__cctx->flags & CC_TRACE)
1202 && !force_cctx
1203 ))
1204 {
1205 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1206 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1207
1208 prev->cctx = 0;
1209
1210 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1211 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1212 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1213 if (!next->cctx)
1214 next->cctx = cctx_get (aTHX);
1215
1216 cctx_put (prev__cctx);
1217 }
1218
1219 ++next->usecount;
1220
1221 if (expect_true (!next->cctx))
1222 next->cctx = cctx_get (aTHX);
1223
1224 has_throw = !!next->throw;
1225
1226 if (expect_false (prev__cctx != next->cctx))
1227 {
1228 prev__cctx->top_env = PL_top_env;
1229 PL_top_env = next->cctx->top_env;
1230 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1231 }
1232
1233 free_coro_mortal (aTHX);
1234 UNLOCK;
1235
1236 if (expect_false (has_throw))
1237 {
1238 struct coro *coro = SvSTATE (coro_current);
1239
1240 if (coro->throw)
807 { 1241 {
1242 SV *exception = coro->throw;
1243 coro->throw = 0;
1244 sv_setsv (ERRSV, exception);
808 setup_coro (next); 1245 croak (0);
809 next->cursp = stacklevel;
810 } 1246 }
811 } 1247 }
812 } 1248 }
1249}
1250
1251struct transfer_args
1252{
1253 struct coro *prev, *next;
1254};
1255
1256#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1257#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1258
1259/** high level stuff ********************************************************/
1260
1261static int
1262coro_state_destroy (pTHX_ struct coro *coro)
1263{
1264 if (coro->flags & CF_DESTROYED)
1265 return 0;
1266
1267 coro->flags |= CF_DESTROYED;
1268
1269 if (coro->flags & CF_READY)
1270 {
1271 /* reduce nready, as destroying a ready coro effectively unreadies it */
1272 /* alternative: look through all ready queues and remove the coro */
1273 LOCK;
1274 --coro_nready;
1275 UNLOCK;
1276 }
1277 else
1278 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1279
1280 if (coro->mainstack && coro->mainstack != main_mainstack)
1281 {
1282 struct coro temp;
1283
1284 if (coro->flags & CF_RUNNING)
1285 croak ("FATAL: tried to destroy currently running coroutine");
1286
1287 save_perl (aTHX_ &temp);
1288 load_perl (aTHX_ coro);
1289
1290 coro_destroy (aTHX_ coro);
1291
1292 load_perl (aTHX_ &temp);
1293
1294 coro->slot = 0;
1295 }
1296
1297 cctx_destroy (coro->cctx);
1298 SvREFCNT_dec (coro->args);
1299
1300 if (coro->next) coro->next->prev = coro->prev;
1301 if (coro->prev) coro->prev->next = coro->next;
1302 if (coro == coro_first) coro_first = coro->next;
1303
1304 return 1;
1305}
1306
1307static int
1308coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1309{
1310 struct coro *coro = (struct coro *)mg->mg_ptr;
1311 mg->mg_ptr = 0;
1312
1313 coro->hv = 0;
1314
1315 if (--coro->refcnt < 0)
1316 {
1317 coro_state_destroy (aTHX_ coro);
1318 Safefree (coro);
1319 }
1320
1321 return 0;
1322}
1323
1324static int
1325coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1326{
1327 struct coro *coro = (struct coro *)mg->mg_ptr;
1328
1329 ++coro->refcnt;
1330
1331 return 0;
1332}
1333
1334static MGVTBL coro_state_vtbl = {
1335 0, 0, 0, 0,
1336 coro_state_free,
1337 0,
1338#ifdef MGf_DUP
1339 coro_state_dup,
1340#else
1341# define MGf_DUP 0
1342#endif
1343};
1344
1345static void
1346prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1347{
1348 ta->prev = SvSTATE (prev_sv);
1349 ta->next = SvSTATE (next_sv);
1350 TRANSFER_CHECK (*ta);
1351}
1352
1353static void
1354api_transfer (SV *prev_sv, SV *next_sv)
1355{
1356 dTHX;
1357 struct transfer_args ta;
1358
1359 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1360 TRANSFER (ta, 1);
1361}
1362
1363/** Coro ********************************************************************/
1364
1365static void
1366coro_enq (pTHX_ SV *coro_sv)
1367{
1368 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1369}
1370
1371static SV *
1372coro_deq (pTHX)
1373{
1374 int prio;
1375
1376 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1377 if (AvFILLp (coro_ready [prio]) >= 0)
1378 return av_shift (coro_ready [prio]);
1379
1380 return 0;
1381}
1382
1383static int
1384api_ready (SV *coro_sv)
1385{
1386 dTHX;
1387 struct coro *coro;
1388 SV *sv_hook;
1389 void (*xs_hook)(void);
1390
1391 if (SvROK (coro_sv))
1392 coro_sv = SvRV (coro_sv);
1393
1394 coro = SvSTATE (coro_sv);
1395
1396 if (coro->flags & CF_READY)
1397 return 0;
1398
1399 coro->flags |= CF_READY;
813 1400
814 LOCK; 1401 LOCK;
815 if (coro_mortal) 1402
816 { 1403 sv_hook = coro_nready ? 0 : coro_readyhook;
817 SvREFCNT_dec (coro_mortal); 1404 xs_hook = coro_nready ? 0 : coroapi.readyhook;
818 coro_mortal = 0; 1405
819 } 1406 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1407 ++coro_nready;
1408
820 UNLOCK; 1409 UNLOCK;
821} 1410
1411 if (sv_hook)
1412 {
1413 dSP;
822 1414
823#define SV_CORO(sv,func) \ 1415 ENTER;
824 do { \ 1416 SAVETMPS;
825 if (SvROK (sv)) \
826 sv = SvRV (sv); \
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843 1417
844#define SvSTATE(sv) (struct coro *)SvIV (sv) 1418 PUSHMARK (SP);
1419 PUTBACK;
1420 call_sv (sv_hook, G_DISCARD);
1421 SPAGAIN;
1422
1423 FREETMPS;
1424 LEAVE;
1425 }
1426
1427 if (xs_hook)
1428 xs_hook ();
1429
1430 return 1;
1431}
1432
1433static int
1434api_is_ready (SV *coro_sv)
1435{
1436 dTHX;
1437 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1438}
845 1439
846static void 1440static void
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 1441prepare_schedule (pTHX_ struct transfer_args *ta)
848{ 1442{
849 SV_CORO (prev, "Coro::transfer"); 1443 SV *prev_sv, *next_sv;
850 SV_CORO (next, "Coro::transfer");
851 1444
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1445 for (;;)
853} 1446 {
1447 LOCK;
1448 next_sv = coro_deq (aTHX);
854 1449
855/** Coro ********************************************************************/ 1450 /* nothing to schedule: call the idle handler */
1451 if (expect_false (!next_sv))
1452 {
1453 dSP;
1454 UNLOCK;
856 1455
857#define PRIO_MAX 3 1456 ENTER;
858#define PRIO_HIGH 1 1457 SAVETMPS;
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863 1458
864/* for Coro.pm */ 1459 PUSHMARK (SP);
865static GV *coro_current, *coro_idle; 1460 PUTBACK;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1461 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
867static int coro_nready; 1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 continue;
1467 }
1468
1469 ta->next = SvSTATE (next_sv);
1470
1471 /* cannot transfer to destroyed coros, skip and look for next */
1472 if (expect_false (ta->next->flags & CF_DESTROYED))
1473 {
1474 UNLOCK;
1475 SvREFCNT_dec (next_sv);
1476 /* coro_nready is already taken care of by destroy */
1477 continue;
1478 }
1479
1480 --coro_nready;
1481 UNLOCK;
1482 break;
1483 }
1484
1485 /* free this only after the transfer */
1486 prev_sv = SvRV (coro_current);
1487 ta->prev = SvSTATE (prev_sv);
1488 TRANSFER_CHECK (*ta);
1489 assert (ta->next->flags & CF_READY);
1490 ta->next->flags &= ~CF_READY;
1491 SvRV_set (coro_current, next_sv);
1492
1493 LOCK;
1494 free_coro_mortal (aTHX);
1495 coro_mortal = prev_sv;
1496 UNLOCK;
1497}
868 1498
869static void 1499static void
870coro_enq (pTHX_ SV *sv) 1500prepare_cede (pTHX_ struct transfer_args *ta)
871{ 1501{
872 if (SvTYPE (sv) != SVt_PVHV) 1502 api_ready (coro_current);
873 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1503 prepare_schedule (aTHX_ ta);
1504}
874 1505
875 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1506static int
876 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1507prepare_cede_notself (pTHX_ struct transfer_args *ta)
877 1508{
878 prio = prio > PRIO_MAX ? PRIO_MAX
879 : prio < PRIO_MIN ? PRIO_MIN
880 : prio;
881
882 av_push (coro_ready [prio - PRIO_MIN], sv);
883 coro_nready++; 1509 if (coro_nready)
884}
885
886static SV *
887coro_deq (pTHX_ int min_prio)
888{
889 int prio = PRIO_MAX - PRIO_MIN;
890
891 min_prio -= PRIO_MIN;
892 if (min_prio < 0)
893 min_prio = 0;
894
895 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
896 if (av_len (coro_ready[prio]) >= 0)
897 { 1510 {
898 coro_nready--; 1511 SV *prev = SvRV (coro_current);
899 return av_shift (coro_ready[prio]); 1512 prepare_schedule (aTHX_ ta);
1513 api_ready (prev);
1514 return 1;
900 } 1515 }
901 1516 else
902 return 0; 1517 return 0;
903}
904
905static void
906api_ready (SV *coro)
907{
908 dTHX;
909
910 if (SvROK (coro))
911 coro = SvRV (coro);
912
913 LOCK;
914 coro_enq (aTHX_ SvREFCNT_inc (coro));
915 UNLOCK;
916} 1518}
917 1519
918static void 1520static void
919api_schedule (void) 1521api_schedule (void)
920{ 1522{
921 dTHX; 1523 dTHX;
1524 struct transfer_args ta;
922 1525
923 SV *prev, *next; 1526 prepare_schedule (aTHX_ &ta);
1527 TRANSFER (ta, 1);
1528}
924 1529
925 LOCK; 1530static int
1531api_cede (void)
1532{
1533 dTHX;
1534 struct transfer_args ta;
926 1535
927 prev = SvRV (GvSV (coro_current)); 1536 prepare_cede (aTHX_ &ta);
928 next = coro_deq (aTHX_ PRIO_MIN);
929 1537
930 if (!next) 1538 if (expect_true (ta.prev != ta.next))
931 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1539 {
1540 TRANSFER (ta, 1);
1541 return 1;
1542 }
1543 else
1544 return 0;
1545}
932 1546
933 /* free this only after the transfer */ 1547static int
934 coro_mortal = prev; 1548api_cede_notself (void)
935 SV_CORO (prev, "Coro::schedule"); 1549{
1550 dTHX;
1551 struct transfer_args ta;
936 1552
937 SvRV (GvSV (coro_current)) = next; 1553 if (prepare_cede_notself (aTHX_ &ta))
938 1554 {
939 SV_CORO (next, "Coro::schedule"); 1555 TRANSFER (ta, 1);
940 1556 return 1;
941 UNLOCK; 1557 }
942 1558 else
943 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1559 return 0;
944 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
945} 1560}
946 1561
947static void 1562static void
948api_cede (void) 1563api_trace (SV *coro_sv, int flags)
949{ 1564{
950 dTHX; 1565 dTHX;
1566 struct coro *coro = SvSTATE (coro_sv);
951 1567
952 LOCK; 1568 if (flags & CC_TRACE)
953 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1569 {
954 UNLOCK; 1570 if (!coro->cctx)
1571 coro->cctx = cctx_new ();
1572 else if (!(coro->cctx->flags & CC_TRACE))
1573 croak ("cannot enable tracing on coroutine with custom stack");
955 1574
956 api_schedule (); 1575 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
957} 1576 }
1577 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1578 {
1579 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
958 1580
1581 if (coro->flags & CF_RUNNING)
1582 PL_runops = RUNOPS_DEFAULT;
1583 else
1584 coro->slot->runops = RUNOPS_DEFAULT;
1585 }
1586}
1587
959MODULE = Coro::State PACKAGE = Coro::State 1588MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
960 1589
961PROTOTYPES: ENABLE 1590PROTOTYPES: DISABLE
962 1591
963BOOT: 1592BOOT:
964{ /* {} necessary for stoopid perl-5.6.x */ 1593{
965#ifdef USE_ITHREADS 1594#ifdef USE_ITHREADS
966 MUTEX_INIT (&coro_mutex); 1595 MUTEX_INIT (&coro_mutex);
967#endif 1596#endif
1597 BOOT_PAGESIZE;
968 1598
969 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1599 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
970 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1600 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1601
1602 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1603 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1604 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1605 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1606
1607 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1608 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1609 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1610
971 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1611 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972 1612
973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1613 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1614 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1615 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
976 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1616 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
977 1617
978 main_mainstack = PL_mainstack; 1618 main_mainstack = PL_mainstack;
1619 main_top_env = PL_top_env;
979 1620
1621 while (main_top_env->je_prev)
1622 main_top_env = main_top_env->je_prev;
1623
980 coroapi.ver = CORO_API_VERSION; 1624 coroapi.ver = CORO_API_VERSION;
1625 coroapi.rev = CORO_API_REVISION;
981 coroapi.transfer = api_transfer; 1626 coroapi.transfer = api_transfer;
982}
983 1627
984Coro::State 1628 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
985_newprocess(args) 1629}
986 SV * args 1630
987 PROTOTYPE: $ 1631SV *
1632new (char *klass, ...)
988 CODE: 1633 CODE:
989 Coro__State coro; 1634{
1635 struct coro *coro;
1636 MAGIC *mg;
1637 HV *hv;
1638 int i;
990 1639
991 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
992 croak ("Coro::State::_newprocess expects an arrayref");
993
994 Newz (0, coro, 1, struct coro); 1640 Newz (0, coro, 1, struct coro);
1641 coro->args = newAV ();
1642 coro->flags = CF_NEW;
995 1643
996 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1644 if (coro_first) coro_first->prev = coro;
997 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1645 coro->next = coro_first;
998 /*coro->stack = 0;*/ 1646 coro_first = coro;
999 1647
1000 /* same as JMPENV_BOOTSTRAP */ 1648 coro->hv = hv = newHV ();
1001 /* we might be able to recycle start_env, but safe is safe */ 1649 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1002 /*Zero(&coro->start_env, 1, JMPENV);*/ 1650 mg->mg_flags |= MGf_DUP;
1003 coro->start_env.je_ret = -1; 1651 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1004 coro->start_env.je_mustcatch = TRUE;
1005 1652
1006 RETVAL = coro; 1653 av_extend (coro->args, items - 1);
1654 for (i = 1; i < items; i++)
1655 av_push (coro->args, newSVsv (ST (i)));
1656}
1007 OUTPUT: 1657 OUTPUT:
1008 RETVAL 1658 RETVAL
1009 1659
1660# these not obviously related functions are all rolled into the same xs
1661# function to increase chances that they all will call transfer with the same
1662# stack offset
1010void 1663void
1011transfer(prev, next, flags) 1664_set_stacklevel (...)
1012 SV *prev 1665 ALIAS:
1013 SV *next 1666 Coro::State::transfer = 1
1014 int flags 1667 Coro::schedule = 2
1015 PROTOTYPE: @ 1668 Coro::cede = 3
1669 Coro::cede_notself = 4
1016 CODE: 1670 CODE:
1671{
1672 struct transfer_args ta;
1673
1017 PUTBACK; 1674 PUTBACK;
1018 SV_CORO (next, "Coro::transfer"); 1675 switch (ix)
1019 SV_CORO (prev, "Coro::transfer"); 1676 {
1020 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1677 case 0:
1678 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1679 ta.next = 0;
1680 break;
1681
1682 case 1:
1683 if (items != 2)
1684 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1685
1686 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1687 break;
1688
1689 case 2:
1690 prepare_schedule (aTHX_ &ta);
1691 break;
1692
1693 case 3:
1694 prepare_cede (aTHX_ &ta);
1695 break;
1696
1697 case 4:
1698 if (!prepare_cede_notself (aTHX_ &ta))
1699 XSRETURN_EMPTY;
1700
1701 break;
1702 }
1021 SPAGAIN; 1703 SPAGAIN;
1022 1704
1705 BARRIER;
1706 PUTBACK;
1707 TRANSFER (ta, 0);
1708 SPAGAIN; /* might be the sp of a different coroutine now */
1709 /* be extra careful not to ever do anything after TRANSFER */
1710}
1711
1712bool
1713_destroy (SV *coro_sv)
1714 CODE:
1715 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1716 OUTPUT:
1717 RETVAL
1718
1023void 1719void
1024DESTROY(coro)
1025 Coro::State coro
1026 CODE:
1027
1028 if (coro->mainstack && coro->mainstack != main_mainstack)
1029 {
1030 struct coro temp;
1031
1032 PUTBACK;
1033 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1034 LOAD (aTHX_ coro);
1035 SPAGAIN;
1036
1037 destroy_stacks (aTHX);
1038
1039 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1040 SPAGAIN;
1041
1042 coro->mainstack = 0;
1043 }
1044
1045 deallocate_stack (coro);
1046 SvREFCNT_dec (coro->args);
1047 Safefree (coro);
1048
1049void
1050_exit(code) 1720_exit (int code)
1051 int code
1052 PROTOTYPE: $ 1721 PROTOTYPE: $
1053 CODE: 1722 CODE:
1054 _exit (code); 1723 _exit (code);
1055 1724
1056MODULE = Coro::State PACKAGE = Coro::Cont 1725int
1726cctx_stacksize (int new_stacksize = 0)
1727 CODE:
1728 RETVAL = coro_stacksize;
1729 if (new_stacksize)
1730 coro_stacksize = new_stacksize;
1731 OUTPUT:
1732 RETVAL
1057 1733
1058# this is slightly dirty (should expose a c-level api) 1734int
1735cctx_count ()
1736 CODE:
1737 RETVAL = cctx_count;
1738 OUTPUT:
1739 RETVAL
1740
1741int
1742cctx_idle ()
1743 CODE:
1744 RETVAL = cctx_idle;
1745 OUTPUT:
1746 RETVAL
1059 1747
1060void 1748void
1061yield(...) 1749list ()
1062 PROTOTYPE: @ 1750 PPCODE:
1751{
1752 struct coro *coro;
1753 for (coro = coro_first; coro; coro = coro->next)
1754 if (coro->hv)
1755 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1756}
1757
1758void
1759call (Coro::State coro, SV *coderef)
1760 ALIAS:
1761 eval = 1
1762 CODE:
1763{
1764 if (coro->mainstack)
1765 {
1766 struct coro temp;
1767
1768 if (!(coro->flags & CF_RUNNING))
1769 {
1770 PUTBACK;
1771 save_perl (aTHX_ &temp);
1772 load_perl (aTHX_ coro);
1773 }
1774
1775 {
1776 dSP;
1777 ENTER;
1778 SAVETMPS;
1779 PUTBACK;
1780 PUSHSTACK;
1781 PUSHMARK (SP);
1782
1783 if (ix)
1784 eval_sv (coderef, 0);
1785 else
1786 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1787
1788 POPSTACK;
1789 SPAGAIN;
1790 FREETMPS;
1791 LEAVE;
1792 PUTBACK;
1793 }
1794
1795 if (!(coro->flags & CF_RUNNING))
1796 {
1797 save_perl (aTHX_ coro);
1798 load_perl (aTHX_ &temp);
1799 SPAGAIN;
1800 }
1801 }
1802}
1803
1804SV *
1805is_ready (Coro::State coro)
1806 PROTOTYPE: $
1807 ALIAS:
1808 is_ready = CF_READY
1809 is_running = CF_RUNNING
1810 is_new = CF_NEW
1811 is_destroyed = CF_DESTROYED
1812 CODE:
1813 RETVAL = boolSV (coro->flags & ix);
1814 OUTPUT:
1815 RETVAL
1816
1817void
1818api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1819
1820SV *
1821has_cctx (Coro::State coro)
1822 PROTOTYPE: $
1823 CODE:
1824 RETVAL = boolSV (!!coro->cctx);
1825 OUTPUT:
1826 RETVAL
1827
1828int
1829is_traced (Coro::State coro)
1830 PROTOTYPE: $
1831 CODE:
1832 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1833 OUTPUT:
1834 RETVAL
1835
1836IV
1837rss (Coro::State coro)
1838 PROTOTYPE: $
1839 ALIAS:
1840 usecount = 1
1063 CODE: 1841 CODE:
1064 SV *yieldstack; 1842 switch (ix)
1065 SV *sv; 1843 {
1066 AV *defav = GvAV (PL_defgv); 1844 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1067 struct coro *prev, *next; 1845 case 1: RETVAL = coro->usecount; break;
1068
1069 yieldstack = *hv_fetch (
1070 (HV *)SvRV (GvSV (coro_current)),
1071 "yieldstack", sizeof ("yieldstack") - 1,
1072 0 1846 }
1073 ); 1847 OUTPUT:
1848 RETVAL
1074 1849
1075 /* set up @_ -- ugly */ 1850void
1076 av_clear (defav); 1851force_cctx ()
1077 av_fill (defav, items - 1); 1852 CODE:
1078 while (items--) 1853 struct coro *coro = SvSTATE (coro_current);
1079 av_store (defav, items, SvREFCNT_inc (ST(items))); 1854 coro->cctx->idle_sp = 0;
1080
1081 sv = av_pop ((AV *)SvRV (yieldstack));
1082 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1083 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1084 SvREFCNT_dec (sv);
1085
1086 transfer (aTHX_ prev, next, 0);
1087 1855
1088MODULE = Coro::State PACKAGE = Coro 1856MODULE = Coro::State PACKAGE = Coro
1089 1857
1090# this is slightly dirty (should expose a c-level api)
1091
1092BOOT: 1858BOOT:
1093{ 1859{
1094 int i; 1860 int i;
1861
1862 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1863 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1864 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1865
1866 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1867 SvREADONLY_on (coro_current);
1868
1095 HV *stash = gv_stashpv ("Coro", TRUE); 1869 coro_stash = gv_stashpv ("Coro", TRUE);
1096 1870
1097 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1871 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1098 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1872 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1099 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1873 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1100 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1874 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1101 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1875 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1102 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1876 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1103
1104 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1105 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1106 1877
1107 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1878 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1108 coro_ready[i] = newAV (); 1879 coro_ready[i] = newAV ();
1109 1880
1110 { 1881 {
1111 SV *sv = perl_get_sv("Coro::API", 1); 1882 SV *sv = perl_get_sv ("Coro::API", TRUE);
1883 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1112 1884
1113 coroapi.schedule = api_schedule; 1885 coroapi.schedule = api_schedule;
1114 coroapi.cede = api_cede; 1886 coroapi.cede = api_cede;
1887 coroapi.cede_notself = api_cede_notself;
1115 coroapi.ready = api_ready; 1888 coroapi.ready = api_ready;
1889 coroapi.is_ready = api_is_ready;
1116 coroapi.nready = &coro_nready; 1890 coroapi.nready = &coro_nready;
1117 coroapi.current = coro_current; 1891 coroapi.current = coro_current;
1118 1892
1119 GCoroAPI = &coroapi; 1893 GCoroAPI = &coroapi;
1120 sv_setiv(sv, (IV)&coroapi); 1894 sv_setiv (sv, (IV)&coroapi);
1121 SvREADONLY_on(sv); 1895 SvREADONLY_on (sv);
1122 } 1896 }
1123} 1897}
1124 1898
1125#if !PERL_MICRO
1126
1127void 1899void
1128ready(self) 1900_set_current (SV *current)
1129 SV * self
1130 PROTOTYPE: $ 1901 PROTOTYPE: $
1131 CODE: 1902 CODE:
1132 api_ready (self); 1903 SvREFCNT_dec (SvRV (coro_current));
1904 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1133 1905
1134#endif 1906void
1907_set_readyhook (SV *hook)
1908 PROTOTYPE: $
1909 CODE:
1910 LOCK;
1911 SvREFCNT_dec (coro_readyhook);
1912 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1913 UNLOCK;
1135 1914
1136int 1915int
1916prio (Coro::State coro, int newprio = 0)
1917 ALIAS:
1918 nice = 1
1919 CODE:
1920{
1921 RETVAL = coro->prio;
1922
1923 if (items > 1)
1924 {
1925 if (ix)
1926 newprio = coro->prio - newprio;
1927
1928 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1929 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1930
1931 coro->prio = newprio;
1932 }
1933}
1934 OUTPUT:
1935 RETVAL
1936
1937SV *
1938ready (SV *self)
1939 PROTOTYPE: $
1940 CODE:
1941 RETVAL = boolSV (api_ready (self));
1942 OUTPUT:
1943 RETVAL
1944
1945int
1137nready(...) 1946nready (...)
1138 PROTOTYPE: 1947 PROTOTYPE:
1139 CODE: 1948 CODE:
1140 RETVAL = coro_nready; 1949 RETVAL = coro_nready;
1141 OUTPUT: 1950 OUTPUT:
1142 RETVAL 1951 RETVAL
1143 1952
1144void 1953void
1145schedule(...) 1954throw (Coro::State self, SV *throw = &PL_sv_undef)
1955 PROTOTYPE: $;$
1956 CODE:
1957 SvREFCNT_dec (self->throw);
1958 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1959
1960void
1961swap_defsv (Coro::State self)
1146 PROTOTYPE: 1962 PROTOTYPE: $
1963 ALIAS:
1964 swap_defav = 1
1965 CODE:
1966 if (!self->slot)
1967 croak ("cannot swap state with coroutine that has no saved state");
1968 else
1969 {
1970 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1971 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1972
1973 SV *tmp = *src; *src = *dst; *dst = tmp;
1974 }
1975
1976# for async_pool speedup
1977void
1978_pool_1 (SV *cb)
1147 CODE: 1979 CODE:
1148 api_schedule (); 1980{
1981 struct coro *coro = SvSTATE (coro_current);
1982 HV *hv = (HV *)SvRV (coro_current);
1983 AV *defav = GvAV (PL_defgv);
1984 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1985 AV *invoke_av;
1986 int i, len;
1987
1988 if (!invoke)
1989 {
1990 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1991 croak ("\3async_pool terminate\2\n");
1992 }
1993
1994 SvREFCNT_dec (coro->saved_deffh);
1995 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1996
1997 hv_store (hv, "desc", sizeof ("desc") - 1,
1998 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1999
2000 invoke_av = (AV *)SvRV (invoke);
2001 len = av_len (invoke_av);
2002
2003 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2004
2005 if (len > 0)
2006 {
2007 av_fill (defav, len - 1);
2008 for (i = 0; i < len; ++i)
2009 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2010 }
2011
2012 SvREFCNT_dec (invoke);
2013}
1149 2014
1150void 2015void
1151cede(...) 2016_pool_2 (SV *cb)
1152 PROTOTYPE:
1153 CODE: 2017 CODE:
1154 api_cede (); 2018{
2019 struct coro *coro = SvSTATE (coro_current);
1155 2020
1156# and these are hacks 2021 sv_setsv (cb, &PL_sv_undef);
2022
2023 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2024 coro->saved_deffh = 0;
2025
2026 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2027 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2028 {
2029 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2030 croak ("\3async_pool terminate\2\n");
2031 }
2032
2033 av_clear (GvAV (PL_defgv));
2034 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2035 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2036
2037 coro->prio = 0;
2038
2039 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2040 api_trace (coro_current, 0);
2041
2042 av_push (av_async_pool, newSVsv (coro_current));
2043}
2044
2045
2046MODULE = Coro::State PACKAGE = Coro::AIO
2047
1157SV * 2048SV *
1158_aio_get_state () 2049_get_state ()
1159 CODE: 2050 CODE:
1160{ 2051{
1161 struct { 2052 struct io_state *data;
1162 int errorno;
1163 int laststype;
1164 int laststatval;
1165 Stat_t statcache;
1166 } data;
1167 2053
2054 RETVAL = newSV (sizeof (struct io_state));
2055 data = (struct io_state *)SvPVX (RETVAL);
2056 SvCUR_set (RETVAL, sizeof (struct io_state));
2057 SvPOK_only (RETVAL);
2058
1168 data.errorno = errno; 2059 data->errorno = errno;
1169 data.laststype = PL_laststype; 2060 data->laststype = PL_laststype;
1170 data.laststatval = PL_laststatval; 2061 data->laststatval = PL_laststatval;
1171 data.statcache = PL_statcache; 2062 data->statcache = PL_statcache;
1172
1173 RETVAL = newSVpvn ((char *)&data, sizeof data);
1174} 2063}
1175 OUTPUT: 2064 OUTPUT:
1176 RETVAL 2065 RETVAL
1177 2066
1178void 2067void
1179_aio_set_state (char *data_) 2068_set_state (char *data_)
1180 PROTOTYPE: $ 2069 PROTOTYPE: $
1181 CODE: 2070 CODE:
1182{ 2071{
1183 struct { 2072 struct io_state *data = (void *)data_;
1184 int errorno;
1185 int laststype;
1186 int laststatval;
1187 Stat_t statcache;
1188 } *data = (void *)data_;
1189 2073
1190 errno = data->errorno; 2074 errno = data->errorno;
1191 PL_laststype = data->laststype; 2075 PL_laststype = data->laststype;
1192 PL_laststatval = data->laststatval; 2076 PL_laststatval = data->laststatval;
1193 PL_statcache = data->statcache; 2077 PL_statcache = data->statcache;
1194} 2078}
2079
2080
2081MODULE = Coro::State PACKAGE = Coro::AnyEvent
2082
2083BOOT:
2084 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2085
2086SV *
2087_schedule (...)
2088 PROTOTYPE: @
2089 CODE:
2090{
2091 static int incede;
2092
2093 api_cede_notself ();
2094
2095 ++incede;
2096 while (coro_nready >= incede && api_cede ())
2097 ;
2098
2099 sv_setsv (sv_activity, &PL_sv_undef);
2100 if (coro_nready >= incede)
2101 {
2102 PUSHMARK (SP);
2103 PUTBACK;
2104 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2105 SPAGAIN;
2106 }
2107
2108 --incede;
2109}
2110

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines