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Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.285 by root, Mon Nov 17 04:17:20 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"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
33#include <signal.h> 84#ifndef CxHASARGS
34 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
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 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147# if CORO_PTHREAD
148static void *coro_thx;
44# endif 149# endif
45#endif 150#endif
46 151
47#define SUB_INIT "Coro::State::initialize" 152/* helper storage struct for Coro::AIO */
48#define UCORO_STATE "_coro_state" 153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
49 161
50/* The next macro should declare a variable stacklevel that contains and approximation 162static double (*nvtime)(); /* so why doesn't it take void? */
51 * to the current C stack pointer. Its property is that it changes with each call
52 * and should be unique. */
53#define dSTACKLEVEL void *stacklevel = &stacklevel
54 163
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
56 165static size_t cctx_stacksize = CORO_STACKSIZE;
57#define labs(l) ((l) >= 0 ? (l) : -(l))
58
59#include "CoroAPI.h"
60
61#ifdef USE_ITHREADS
62static perl_mutex coro_mutex;
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
65#else
66# define LOCK (void)0
67# define UNLOCK (void)0
68#endif
69
70static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
72static HV *coro_state_stash; 169static 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 */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 171
77/* this is actually not only the c stack but also c registers etc... */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
78typedef struct { 199typedef struct coro_cctx
79 int refcnt; /* pointer reference counter */ 200{
80 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
81 int gencnt; /* generation counter */
82 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
83 coro_context cctx; 211 coro_context cctx;
84 212
85 void *sptr; 213 U32 gen;
86 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
87} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
88 219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
89struct coro { 242struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 243 /* the C coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 244 coro_cctx *cctx;
92 245
93 /* the optional C context */ 246 /* state data */
94 coro_stack *stack; 247 struct CoroSLF slf_frame; /* saved slf frame */
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; 248 AV *mainstack;
111 SV **stack_sp; 249 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;
137 250
138 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *throw; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
140}; 269};
141 270
142typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
144 273
145/* mostly copied from op.c:cv_clone2 */ 274/* the following variables are effectively part of the perl context */
146STATIC AV * 275/* and get copied between struct coro and these variables */
147clone_padlist (pTHX_ AV *protopadlist) 276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278static SV *coro_throw;
279
280/** Coro ********************************************************************/
281
282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
148{ 300{
149 AV *av; 301#if PERL_VERSION_ATLEAST (5,10,0)
150 I32 ix; 302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 303 get_sv (name, create);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 304#endif
153 SV **pname = AvARRAY (protopad_name); 305 return get_sv (name, create);
154 SV **ppad = AvARRAY (protopad); 306}
155 I32 fname = AvFILLp (protopad_name); 307
156 I32 fpad = AvFILLp (protopad); 308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
329coro_clone_padlist (pTHX_ CV *cv)
330{
331 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 332 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);
167 333
168 newpadlist = newAV (); 334 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist);
343
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *) newpad); 345 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 AvFLAGS (av) = AVf_REIFY;
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
241 346
242 return newpadlist; 347 return newpadlist;
243} 348}
244 349
245STATIC void 350static void
246free_padlist (pTHX_ AV *padlist) 351free_padlist (pTHX_ AV *padlist)
247{ 352{
248 /* may be during global destruction */ 353 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 354 if (SvREFCNT (padlist))
250 { 355 {
… …
264 369
265 SvREFCNT_dec ((SV*)padlist); 370 SvREFCNT_dec ((SV*)padlist);
266 } 371 }
267} 372}
268 373
269STATIC int 374static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 375coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 376{
272 AV *padlist; 377 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 378 AV *av = (AV *)mg->mg_obj;
274 379
275 /* casting is fun. */ 380 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
278 383
279 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280}
281 385
386 return 0;
387}
388
282#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_cv PERL_MAGIC_ext
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
283 391
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC(sv, type) \
398 expect_true (SvMAGIC (sv)) \
399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
400 ? SvMAGIC (sv) \
401 : mg_find (sv, type) \
402 : 0
403
404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
408SvSTATE_ (pTHX_ SV *coro)
409{
410 HV *stash;
411 MAGIC *mg;
412
413 if (SvROK (coro))
414 coro = SvRV (coro);
415
416 if (expect_false (SvTYPE (coro) != SVt_PVHV))
417 croak ("Coro::State object required");
418
419 stash = SvSTASH (coro);
420 if (expect_false (stash != coro_stash && stash != coro_state_stash))
421 {
422 /* very slow, but rare, check */
423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
424 croak ("Coro::State object required");
425 }
426
427 mg = CORO_MAGIC_state (coro);
428 return (struct coro *)mg->mg_ptr;
429}
430
431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
285 445
286/* the next two functions merely cache the padlists */ 446/* the next two functions merely cache the padlists */
287STATIC void 447static void
288get_padlist (pTHX_ CV *cv) 448get_padlist (pTHX_ CV *cv)
289{ 449{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 450 MAGIC *mg = CORO_MAGIC_cv (cv);
451 AV *av;
291 452
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 453 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 454 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 455 else
456 {
457#if CORO_PREFER_PERL_FUNCTIONS
458 /* this is probably cleaner? but also slower! */
459 /* in practise, it seems to be less stable */
460 CV *cp = Perl_cv_clone (cv);
461 CvPADLIST (cv) = CvPADLIST (cp);
462 CvPADLIST (cp) = 0;
463 SvREFCNT_dec (cp);
464#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 465 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
466#endif
467 }
296} 468}
297 469
298STATIC void 470static void
299put_padlist (pTHX_ CV *cv) 471put_padlist (pTHX_ CV *cv)
300{ 472{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 473 MAGIC *mg = CORO_MAGIC_cv (cv);
474 AV *av;
302 475
303 if (!mg) 476 if (expect_false (!mg))
304 { 477 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 }
310 478
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 479 av = (AV *)mg->mg_obj;
312}
313 480
314#define SB do { 481 if (expect_false (AvFILLp (av) >= AvMAX (av)))
315#define SE } while (0) 482 av_extend (av, AvMAX (av) + 1);
316 483
317#define LOAD(state) load_state(aTHX_ (state)); 484 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 485}
319 486
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 487/** load & save, init *******************************************************/
321 488
322static void 489static void
323load_state(pTHX_ Coro__State c) 490load_perl (pTHX_ Coro__State c)
324{ 491{
325 PL_dowarn = c->dowarn; 492 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 493 c->slot = 0;
327 494
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 495 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 PL_retstack = c->retstack;
352 PL_retstack_ix = c->retstack_ix;
353 PL_retstack_max = c->retstack_max;
354 PL_curpm = c->curpm;
355 PL_curcop = c->curcop;
356 PL_top_env = c->top_env;
357 496
358 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 497 GvSV (PL_defgv) = slot->defsv;
359 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 498 GvAV (PL_defgv) = slot->defav;
360 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 499 GvSV (PL_errgv) = slot->errsv;
500 GvSV (irsgv) = slot->irsgv;
501
502 #define VAR(name,type) PL_ ## name = slot->name;
503 # include "state.h"
504 #undef VAR
361 505
362 { 506 {
363 dSP; 507 dSP;
508
364 CV *cv; 509 CV *cv;
365 510
366 /* now do the ugly restore mess */ 511 /* now do the ugly restore mess */
367 while ((cv = (CV *)POPs)) 512 while (expect_true (cv = (CV *)POPs))
368 { 513 {
369 AV *padlist = (AV *)POPs;
370
371 if (padlist)
372 {
373 put_padlist (aTHX_ cv); /* mark this padlist as available */ 514 put_padlist (aTHX_ cv); /* mark this padlist as available */
374 CvPADLIST(cv) = padlist; 515 CvDEPTH (cv) = PTR2IV (POPs);
375 } 516 CvPADLIST (cv) = (AV *)POPs;
376
377 ++CvDEPTH(cv);
378 } 517 }
379 518
380 PUTBACK; 519 PUTBACK;
381 } 520 }
382}
383 521
522 slf_frame = c->slf_frame;
523 coro_throw = c->throw;
524}
525
384static void 526static void
385save_state(pTHX_ Coro__State c, int flags) 527save_perl (pTHX_ Coro__State c)
386{ 528{
529 c->throw = coro_throw;
530 c->slf_frame = slf_frame;
531
387 { 532 {
388 dSP; 533 dSP;
389 I32 cxix = cxstack_ix; 534 I32 cxix = cxstack_ix;
390 PERL_CONTEXT *ccstk = cxstack; 535 PERL_CONTEXT *ccstk = cxstack;
391 PERL_SI *top_si = PL_curstackinfo; 536 PERL_SI *top_si = PL_curstackinfo;
… …
393 /* 538 /*
394 * the worst thing you can imagine happens first - we have to save 539 * the worst thing you can imagine happens first - we have to save
395 * (and reinitialize) all cv's in the whole callchain :( 540 * (and reinitialize) all cv's in the whole callchain :(
396 */ 541 */
397 542
398 PUSHs (Nullsv); 543 XPUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 544 /* this loop was inspired by pp_caller */
400 for (;;) 545 for (;;)
401 { 546 {
402 while (cxix >= 0) 547 while (expect_true (cxix >= 0))
403 { 548 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 549 PERL_CONTEXT *cx = &ccstk[cxix--];
405 550
406 if (CxTYPE(cx) == CXt_SUB) 551 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
407 { 552 {
408 CV *cv = cx->blk_sub.cv; 553 CV *cv = cx->blk_sub.cv;
554
409 if (CvDEPTH(cv)) 555 if (expect_true (CvDEPTH (cv)))
410 { 556 {
411 EXTEND (SP, CvDEPTH(cv)*2); 557 EXTEND (SP, 3);
412
413 while (--CvDEPTH(cv))
414 {
415 /* this tells the restore code to increment CvDEPTH */
416 PUSHs (Nullsv);
417 PUSHs ((SV *)cv);
418 }
419
420 PUSHs ((SV *)CvPADLIST(cv)); 558 PUSHs ((SV *)CvPADLIST (cv));
559 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 560 PUSHs ((SV *)cv);
422 561
562 CvDEPTH (cv) = 0;
423 get_padlist (aTHX_ cv); /* this is a monster */ 563 get_padlist (aTHX_ cv);
424 } 564 }
425 } 565 }
426#ifdef CXt_FORMAT
427 else if (CxTYPE(cx) == CXt_FORMAT)
428 {
429 /* I never used formats, so how should I know how these are implemented? */
430 /* my bold guess is as a simple, plain sub... */
431 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
432 }
433#endif
434 } 566 }
435 567
436 if (top_si->si_type == PERLSI_MAIN) 568 if (expect_true (top_si->si_type == PERLSI_MAIN))
437 break; 569 break;
438 570
439 top_si = top_si->si_prev; 571 top_si = top_si->si_prev;
440 ccstk = top_si->si_cxstack; 572 ccstk = top_si->si_cxstack;
441 cxix = top_si->si_cxix; 573 cxix = top_si->si_cxix;
442 } 574 }
443 575
444 PUTBACK; 576 PUTBACK;
445 } 577 }
446 578
447 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 579 /* allocate some space on the context stack for our purposes */
448 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 580 /* we manually unroll here, as usually 2 slots is enough */
449 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 581 if (SLOT_COUNT >= 1) CXINC;
582 if (SLOT_COUNT >= 2) CXINC;
583 if (SLOT_COUNT >= 3) CXINC;
584 {
585 int i;
586 for (i = 3; i < SLOT_COUNT; ++i)
587 CXINC;
588 }
589 cxstack_ix -= SLOT_COUNT; /* undo allocation */
450 590
451 c->dowarn = PL_dowarn;
452 c->in_eval = PL_in_eval;
453
454 c->curstackinfo = PL_curstackinfo;
455 c->curstack = PL_curstack;
456 c->mainstack = PL_mainstack; 591 c->mainstack = PL_mainstack;
457 c->stack_sp = PL_stack_sp; 592
458 c->op = PL_op; 593 {
459 c->curpad = PL_curpad; 594 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
460 c->comppad = PL_comppad; 595
461 c->compcv = PL_compcv; 596 slot->defav = GvAV (PL_defgv);
462 c->stack_base = PL_stack_base; 597 slot->defsv = DEFSV;
463 c->stack_max = PL_stack_max; 598 slot->errsv = ERRSV;
464 c->tmps_stack = PL_tmps_stack; 599 slot->irsgv = GvSV (irsgv);
465 c->tmps_floor = PL_tmps_floor; 600
466 c->tmps_ix = PL_tmps_ix; 601 #define VAR(name,type) slot->name = PL_ ## name;
467 c->tmps_max = PL_tmps_max; 602 # include "state.h"
468 c->markstack = PL_markstack; 603 #undef VAR
469 c->markstack_ptr = PL_markstack_ptr; 604 }
470 c->markstack_max = PL_markstack_max;
471 c->scopestack = PL_scopestack;
472 c->scopestack_ix = PL_scopestack_ix;
473 c->scopestack_max = PL_scopestack_max;
474 c->savestack = PL_savestack;
475 c->savestack_ix = PL_savestack_ix;
476 c->savestack_max = PL_savestack_max;
477 c->retstack = PL_retstack;
478 c->retstack_ix = PL_retstack_ix;
479 c->retstack_max = PL_retstack_max;
480 c->curpm = PL_curpm;
481 c->curcop = PL_curcop;
482 c->top_env = PL_top_env;
483} 605}
484 606
485/* 607/*
486 * allocate various perl stacks. This is an exact copy 608 * allocate various perl stacks. This is almost an exact copy
487 * of perl.c:init_stacks, except that it uses less memory 609 * of perl.c:init_stacks, except that it uses less memory
488 * on the (sometimes correct) assumption that coroutines do 610 * on the (sometimes correct) assumption that coroutines do
489 * not usually need a lot of stackspace. 611 * not usually need a lot of stackspace.
490 */ 612 */
491STATIC void 613#if CORO_PREFER_PERL_FUNCTIONS
614# define coro_init_stacks init_stacks
615#else
616static void
492coro_init_stacks (pTHX) 617coro_init_stacks (pTHX)
493{ 618{
494 LOCK; 619 PL_curstackinfo = new_stackinfo(32, 8);
495
496 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497 PL_curstackinfo->si_type = PERLSI_MAIN; 620 PL_curstackinfo->si_type = PERLSI_MAIN;
498 PL_curstack = PL_curstackinfo->si_stack; 621 PL_curstack = PL_curstackinfo->si_stack;
499 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 622 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500 623
501 PL_stack_base = AvARRAY(PL_curstack); 624 PL_stack_base = AvARRAY(PL_curstack);
502 PL_stack_sp = PL_stack_base; 625 PL_stack_sp = PL_stack_base;
503 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 626 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
504 627
505 New(50,PL_tmps_stack,96,SV*); 628 New(50,PL_tmps_stack,32,SV*);
506 PL_tmps_floor = -1; 629 PL_tmps_floor = -1;
507 PL_tmps_ix = -1; 630 PL_tmps_ix = -1;
508 PL_tmps_max = 96; 631 PL_tmps_max = 32;
509 632
510 New(54,PL_markstack,16,I32); 633 New(54,PL_markstack,16,I32);
511 PL_markstack_ptr = PL_markstack; 634 PL_markstack_ptr = PL_markstack;
512 PL_markstack_max = PL_markstack + 16; 635 PL_markstack_max = PL_markstack + 16;
513 636
514#ifdef SET_MARK_OFFSET 637#ifdef SET_MARK_OFFSET
515 SET_MARK_OFFSET; 638 SET_MARK_OFFSET;
516#endif 639#endif
517 640
518 New(54,PL_scopestack,16,I32); 641 New(54,PL_scopestack,8,I32);
519 PL_scopestack_ix = 0; 642 PL_scopestack_ix = 0;
520 PL_scopestack_max = 16; 643 PL_scopestack_max = 8;
521 644
522 New(54,PL_savestack,96,ANY); 645 New(54,PL_savestack,24,ANY);
523 PL_savestack_ix = 0; 646 PL_savestack_ix = 0;
524 PL_savestack_max = 96; 647 PL_savestack_max = 24;
525 648
649#if !PERL_VERSION_ATLEAST (5,10,0)
526 New(54,PL_retstack,8,OP*); 650 New(54,PL_retstack,4,OP*);
527 PL_retstack_ix = 0; 651 PL_retstack_ix = 0;
528 PL_retstack_max = 8; 652 PL_retstack_max = 4;
529 653#endif
530 UNLOCK;
531} 654}
655#endif
532 656
533/* 657/*
534 * destroy the stacks, the callchain etc... 658 * destroy the stacks, the callchain etc...
535 */ 659 */
536STATIC void 660static void
537destroy_stacks(pTHX) 661coro_destruct_stacks (pTHX)
538{ 662{
539 if (!IN_DESTRUCT)
540 {
541 /* is this ugly, I ask? */
542 LEAVE_SCOPE (0);
543
544 /* sure it is, but more important: is it correct?? :/ */
545 FREETMPS;
546
547 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
548 }
549
550 while (PL_curstackinfo->si_next) 663 while (PL_curstackinfo->si_next)
551 PL_curstackinfo = PL_curstackinfo->si_next; 664 PL_curstackinfo = PL_curstackinfo->si_next;
552 665
553 while (PL_curstackinfo) 666 while (PL_curstackinfo)
554 { 667 {
555 PERL_SI *p = PL_curstackinfo->si_prev; 668 PERL_SI *p = PL_curstackinfo->si_prev;
556 669
557 { /*D*//*remove*/
558 dSP;
559 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
560 PUTBACK; /* possibly superfluous */
561 }
562
563 if (!IN_DESTRUCT) 670 if (!IN_DESTRUCT)
564 {
565 dounwind (-1);/*D*//*remove*/
566 SvREFCNT_dec (PL_curstackinfo->si_stack); 671 SvREFCNT_dec (PL_curstackinfo->si_stack);
567 }
568 672
569 Safefree (PL_curstackinfo->si_cxstack); 673 Safefree (PL_curstackinfo->si_cxstack);
570 Safefree (PL_curstackinfo); 674 Safefree (PL_curstackinfo);
571 PL_curstackinfo = p; 675 PL_curstackinfo = p;
572 } 676 }
573 677
574 Safefree (PL_tmps_stack); 678 Safefree (PL_tmps_stack);
575 Safefree (PL_markstack); 679 Safefree (PL_markstack);
576 Safefree (PL_scopestack); 680 Safefree (PL_scopestack);
577 Safefree (PL_savestack); 681 Safefree (PL_savestack);
682#if !PERL_VERSION_ATLEAST (5,10,0)
578 Safefree (PL_retstack); 683 Safefree (PL_retstack);
579}
580
581static void
582allocate_stack (Coro__State ctx, int alloc)
583{
584 coro_stack *stack;
585
586 New (0, stack, 1, coro_stack);
587
588 stack->refcnt = 1;
589 stack->usecnt = 1;
590 stack->gencnt = ctx->gencnt = 0;
591
592 if (alloc)
593 {
594#if HAVE_MMAP
595 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597 if (stack->sptr == (void *)-1)
598#endif 684#endif
685}
686
687static size_t
688coro_rss (pTHX_ struct coro *coro)
689{
690 size_t rss = sizeof (*coro);
691
692 if (coro->mainstack)
693 {
694 perl_slots tmp_slot;
695 perl_slots *slot;
696
697 if (coro->flags & CF_RUNNING)
599 { 698 {
600 /*FIXME*//*D*//* reasonable stack size! */ 699 slot = &tmp_slot;
601 stack->ssize = - (STACKSIZE * sizeof (long)); 700
602 New (0, stack->sptr, STACKSIZE, long); 701 #define VAR(name,type) slot->name = PL_ ## name;
702 # include "state.h"
703 #undef VAR
603 } 704 }
604 }
605 else 705 else
606 stack->sptr = 0; 706 slot = coro->slot;
607 707
608 ctx->stack = stack; 708 if (slot)
609}
610
611static void
612deallocate_stack (Coro__State ctx)
613{
614 coro_stack *stack = ctx->stack;
615
616 ctx->stack = 0;
617
618 if (stack)
619 {
620 if (!--stack->refcnt)
621 { 709 {
622#ifdef HAVE_MMAP 710 rss += sizeof (slot->curstackinfo);
623 if (stack->ssize > 0 && stack->sptr) 711 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
624 munmap (stack->sptr, stack->ssize); 712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
625 else 713 rss += slot->tmps_max * sizeof (SV *);
626#endif 714 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
627 Safefree (stack->sptr); 715 rss += slot->scopestack_max * sizeof (I32);
716 rss += slot->savestack_max * sizeof (ANY);
628 717
629 Safefree (stack); 718#if !PERL_VERSION_ATLEAST (5,10,0)
719 rss += slot->retstack_max * sizeof (OP *);
720#endif
630 } 721 }
631 else if (ctx->gencnt == stack->gencnt) 722 }
632 --stack->usecnt; 723
724 return rss;
725}
726
727/** coroutine stack handling ************************************************/
728
729static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
730static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
731static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
732
733/* apparently < 5.8.8 */
734#ifndef MgPV_nolen_const
735#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
736 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
737 (const char*)(mg)->mg_ptr)
738#endif
739
740/*
741 * This overrides the default magic get method of %SIG elements.
742 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
743 * and instead of tryign to save and restore the hash elements, we just provide
744 * readback here.
745 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
746 * not expecting this to actually change the hook. This is a potential problem
747 * when a schedule happens then, but we ignore this.
748 */
749static int
750coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
751{
752 const char *s = MgPV_nolen_const (mg);
753
754 if (*s == '_')
633 } 755 {
634} 756 SV **svp = 0;
635 757
758 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
759 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
760
761 if (svp)
762 {
763 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
764 return 0;
765 }
766 }
767
768 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
769}
770
636static void 771static int
637setup_coro (void *arg) 772coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
773{
774 const char *s = MgPV_nolen_const (mg);
775
776 if (*s == '_')
777 {
778 SV **svp = 0;
779
780 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
781 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
782
783 if (svp)
784 {
785 SV *old = *svp;
786 *svp = 0;
787 SvREFCNT_dec (old);
788 return 0;
789 }
790 }
791
792 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
793}
794
795static int
796coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
797{
798 const char *s = MgPV_nolen_const (mg);
799
800 if (*s == '_')
801 {
802 SV **svp = 0;
803
804 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806
807 if (svp)
808 {
809 SV *old = *svp;
810 *svp = newSVsv (sv);
811 SvREFCNT_dec (old);
812 return 0;
813 }
814 }
815
816 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
817}
818
819static void
820prepare_nop (pTHX_ struct coro_transfer_args *ta)
821{
822 /* kind of mega-hacky, but works */
823 ta->next = ta->prev = (struct coro *)ta;
824}
825
826static int
827slf_check_nop (pTHX_ struct CoroSLF *frame)
828{
829 return 0;
830}
831
832static void NOINLINE /* noinline to keep it out of the transfer fast path */
833coro_setup (pTHX_ struct coro *coro)
638{ 834{
639 /* 835 /*
640 * emulate part of the perl startup here. 836 * emulate part of the perl startup here.
641 */ 837 */
642 dTHX;
643 dSP;
644 Coro__State ctx = (Coro__State)arg;
645 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646
647 coro_init_stacks (aTHX); 838 coro_init_stacks (aTHX);
648 /*PL_curcop = 0;*/ 839
649 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 840 PL_runops = RUNOPS_DEFAULT;
841 PL_curcop = &PL_compiling;
842 PL_in_eval = EVAL_NULL;
843 PL_comppad = 0;
844 PL_curpm = 0;
845 PL_curpad = 0;
846 PL_localizing = 0;
847 PL_dirty = 0;
848 PL_restartop = 0;
849#if PERL_VERSION_ATLEAST (5,10,0)
850 PL_parser = 0;
851#endif
852
853 /* recreate the die/warn hooks */
854 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
855 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
856
857 GvSV (PL_defgv) = newSV (0);
858 GvAV (PL_defgv) = coro->args; coro->args = 0;
859 GvSV (PL_errgv) = newSV (0);
860 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
861 PL_rs = newSVsv (GvSV (irsgv));
862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
863
864 {
865 dSP;
866 UNOP myop;
867
868 Zero (&myop, 1, UNOP);
869 myop.op_next = Nullop;
870 myop.op_flags = OPf_WANT_VOID;
871
872 PUSHMARK (SP);
873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
874 PUTBACK;
875 PL_op = (OP *)&myop;
876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
877 SPAGAIN;
878 }
879
880 /* this newly created coroutine might be run on an existing cctx which most
881 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
882 */
883 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
884 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
885
886 coro_throw = coro->throw;
887}
888
889static void
890coro_destruct (pTHX_ struct coro *coro)
891{
892 if (!IN_DESTRUCT)
893 {
894 /* restore all saved variables and stuff */
895 LEAVE_SCOPE (0);
896 assert (PL_tmps_floor == -1);
897
898 /* free all temporaries */
899 FREETMPS;
900 assert (PL_tmps_ix == -1);
901
902 /* unwind all extra stacks */
903 POPSTACK_TO (PL_mainstack);
904
905 /* unwind main stack */
906 dounwind (-1);
907 }
908
909 SvREFCNT_dec (GvSV (PL_defgv));
650 SvREFCNT_dec (GvAV (PL_defgv)); 910 SvREFCNT_dec (GvAV (PL_defgv));
651 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 911 SvREFCNT_dec (GvSV (PL_errgv));
912 SvREFCNT_dec (PL_defoutgv);
913 SvREFCNT_dec (PL_rs);
914 SvREFCNT_dec (GvSV (irsgv));
652 915
653 SPAGAIN; 916 SvREFCNT_dec (PL_diehook);
917 SvREFCNT_dec (PL_warnhook);
918
919 SvREFCNT_dec (coro->saved_deffh);
920 SvREFCNT_dec (coro_throw);
654 921
655 if (ctx->stack) 922 coro_destruct_stacks (aTHX);
656 { 923}
657 ctx->cursp = 0;
658 924
659 PUSHMARK(SP); 925INLINE void
660 PUTBACK; 926free_coro_mortal (pTHX)
661 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 927{
662 928 if (expect_true (coro_mortal))
663 if (SvTRUE (ERRSV))
664 croak (NULL);
665 else
666 croak ("FATAL: CCTXT coroutine returned!");
667 } 929 {
668 else 930 SvREFCNT_dec (coro_mortal);
931 coro_mortal = 0;
669 { 932 }
670 UNOP myop; 933}
671 934
672 PL_op = (OP *)&myop; 935static int
936runops_trace (pTHX)
937{
938 COP *oldcop = 0;
939 int oldcxix = -2;
940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
941 coro_cctx *cctx = coro->cctx;
673 942
674 Zero(&myop, 1, UNOP); 943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
675 myop.op_next = Nullop;
676 myop.op_flags = OPf_WANT_VOID;
677
678 PUSHMARK(SP);
679 XPUSHs (sub_init);
680 /*
681 * the next line is slightly wrong, as PL_op->op_next
682 * is actually being executed so we skip the first op.
683 * that doesn't matter, though, since it is only
684 * pp_nextstate and we never return...
685 * ah yes, and I don't care anyways ;)
686 */
687 PUTBACK;
688 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689 SPAGAIN;
690
691 ENTER; /* necessary e.g. for dounwind */
692 } 944 {
693} 945 PERL_ASYNC_CHECK ();
694 946
695static void 947 if (cctx->flags & CC_TRACE_ALL)
696continue_coro (void *arg)
697{
698 /*
699 * this is a _very_ stripped down perl interpreter ;)
700 */
701 dTHX;
702 Coro__State ctx = (Coro__State)arg;
703 JMPENV coro_start_env;
704
705 PL_top_env = &ctx->start_env;
706
707 ctx->cursp = 0;
708 PL_op = PL_op->op_next;
709 CALLRUNOPS(aTHX);
710
711 abort ();
712}
713
714STATIC void
715transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716{
717 dSTACKLEVEL;
718
719 if (prev != next)
720 {
721 if (next->mainstack)
722 { 948 {
723 LOCK; 949 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
724 SAVE (prev, flags);
725 LOAD (next);
726 UNLOCK;
727
728 /* mark this state as in-use */
729 next->mainstack = 0;
730 next->tmps_ix = -2;
731
732 /* stacklevel changed? if yes, grab the stack for us! */
733 if (flags & TRANSFER_SAVE_CCTXT)
734 { 950 {
735 if (!prev->stack) 951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
736 allocate_stack (prev, 0); 952 SV **bot, **top;
737 else if (prev->cursp != stacklevel 953 AV *av = newAV (); /* return values */
738 && prev->stack->usecnt > 1) 954 SV **cb;
955 dSP;
956
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 bot = PL_stack_base + cx->blk_oldsp + 1;
963 top = cx->blk_gimme == G_ARRAY ? SP + 1
964 : cx->blk_gimme == G_SCALAR ? bot + 1
965 : bot;
966
967 av_extend (av, top - bot);
968 while (bot < top)
969 av_push (av, SvREFCNT_inc_NN (*bot++));
970
971 PL_runops = RUNOPS_DEFAULT;
972 ENTER;
973 SAVETMPS;
974 EXTEND (SP, 3);
975 PUSHMARK (SP);
976 PUSHs (&PL_sv_no);
977 PUSHs (fullname);
978 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
979 PUTBACK;
980 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
981 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
982 SPAGAIN;
983 FREETMPS;
984 LEAVE;
985 PL_runops = runops_trace;
986 }
987
988 if (oldcop != PL_curcop)
989 {
990 oldcop = PL_curcop;
991
992 if (PL_curcop != &PL_compiling)
739 { 993 {
740 prev->gencnt = ++prev->stack->gencnt; 994 SV **cb;
741 prev->stack->usecnt = 1;
742 }
743 995
744 /* has our stack been invalidated? */ 996 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
745 if (next->stack && next->stack->gencnt != next->gencnt)
746 { 997 {
747 deallocate_stack (next); 998 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
748 allocate_stack (next, 1); 999
749 coro_create (&(next->stack->cctx), 1000 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
750 continue_coro, (void *)next, 1001 {
751 next->stack->sptr, labs (next->stack->ssize)); 1002 runops_proc_t old_runops = PL_runops;
1003 dSP;
1004 GV *gv = CvGV (cx->blk_sub.cv);
1005 SV *fullname = sv_2mortal (newSV (0));
1006
1007 if (isGV (gv))
1008 gv_efullname3 (fullname, gv, 0);
1009
1010 PL_runops = RUNOPS_DEFAULT;
1011 ENTER;
1012 SAVETMPS;
1013 EXTEND (SP, 3);
1014 PUSHMARK (SP);
1015 PUSHs (&PL_sv_yes);
1016 PUSHs (fullname);
1017 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1018 PUTBACK;
1019 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1020 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1021 SPAGAIN;
1022 FREETMPS;
1023 LEAVE;
1024 PL_runops = runops_trace;
1025 }
1026
1027 oldcxix = cxstack_ix;
752 } 1028 }
753 1029
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1030 if (cctx->flags & CC_TRACE_LINE)
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 else
759 next->cursp = stacklevel;
760 }
761 else if (next->tmps_ix == -2)
762 croak ("tried to transfer to running coroutine");
763 else
764 {
765 LOCK;
766 SAVE (prev, -1); /* first get rid of the old state */
767 UNLOCK;
768
769 if (flags & TRANSFER_SAVE_CCTXT)
770 {
771 if (!prev->stack)
772 allocate_stack (prev, 0);
773
774 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775 { 1031 {
776 PL_top_env = &next->start_env; 1032 dSP;
777 1033
778 setup_coro (next); 1034 PL_runops = RUNOPS_DEFAULT;
779 next->cursp = stacklevel; 1035 ENTER;
780 1036 SAVETMPS;
781 prev->stack->refcnt++; 1037 EXTEND (SP, 3);
782 prev->stack->usecnt++; 1038 PL_runops = RUNOPS_DEFAULT;
783 next->stack = prev->stack; 1039 PUSHMARK (SP);
784 next->gencnt = prev->gencnt; 1040 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1041 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1042 PUTBACK;
1043 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1044 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1045 SPAGAIN;
1046 FREETMPS;
1047 LEAVE;
1048 PL_runops = runops_trace;
785 } 1049 }
786 else
787 {
788 assert (!next->stack);
789 allocate_stack (next, 1);
790 coro_create (&(next->stack->cctx),
791 setup_coro, (void *)next,
792 next->stack->sptr, labs (next->stack->ssize));
793 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794 prev->cursp = stacklevel;
795 /* don't add any code here */
796 } 1050 }
797 } 1051 }
798 else
799 {
800 setup_coro (next);
801 next->cursp = stacklevel;
802 }
803 } 1052 }
804 } 1053 }
805 1054
806 LOCK; 1055 TAINT_NOT;
807 if (coro_mortal) 1056 return 0;
1057}
1058
1059static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1061{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0;
1064}
1065
1066/* inject a fake call to Coro::State::_cctx_init into the execution */
1067/* _cctx_init should be careful, as it could be called at almost any time */
1068/* during execution of a perl program */
1069/* also initialises PL_top_env */
1070static void NOINLINE
1071cctx_prepare (pTHX_ coro_cctx *cctx)
1072{
1073 dSP;
1074 UNOP myop;
1075
1076 PL_top_env = &PL_start_env;
1077
1078 if (cctx->flags & CC_TRACE)
1079 PL_runops = runops_trace;
1080
1081 Zero (&myop, 1, UNOP);
1082 myop.op_next = PL_op;
1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1084
1085 PUSHMARK (SP);
1086 EXTEND (SP, 2);
1087 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1089 PUTBACK;
1090 PL_op = (OP *)&myop;
1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1092 SPAGAIN;
1093}
1094
1095/* the tail of transfer: execute stuff we can only do after a transfer */
1096INLINE void
1097transfer_tail (pTHX)
1098{
1099 free_coro_mortal (aTHX);
1100}
1101
1102/*
1103 * this is a _very_ stripped down perl interpreter ;)
1104 */
1105static void
1106cctx_run (void *arg)
1107{
1108#ifdef USE_ITHREADS
1109# if CORO_PTHREAD
1110 PERL_SET_CONTEXT (coro_thx);
1111# endif
1112#endif
808 { 1113 {
809 SvREFCNT_dec (coro_mortal); 1114 dTHX;
810 coro_mortal = 0; 1115
1116 /* normally we would need to skip the entersub here */
1117 /* not doing so will re-execute it, which is exactly what we want */
1118 /* PL_nop = PL_nop->op_next */
1119
1120 /* inject a fake subroutine call to cctx_init */
1121 cctx_prepare (aTHX_ (coro_cctx *)arg);
1122
1123 /* cctx_run is the alternative tail of transfer() */
1124 transfer_tail (aTHX);
1125
1126 /* somebody or something will hit me for both perl_run and PL_restartop */
1127 PL_restartop = PL_op;
1128 perl_run (PL_curinterp);
1129
1130 /*
1131 * If perl-run returns we assume exit() was being called or the coro
1132 * fell off the end, which seems to be the only valid (non-bug)
1133 * reason for perl_run to return. We try to exit by jumping to the
1134 * bootstrap-time "top" top_env, as we cannot restore the "main"
1135 * coroutine as Coro has no such concept
1136 */
1137 PL_top_env = main_top_env;
1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 }
1140}
1141
1142static coro_cctx *
1143cctx_new ()
1144{
1145 coro_cctx *cctx;
1146
1147 ++cctx_count;
1148 New (0, cctx, 1, coro_cctx);
1149
1150 cctx->gen = cctx_gen;
1151 cctx->flags = 0;
1152 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1153
1154 return cctx;
1155}
1156
1157/* create a new cctx only suitable as source */
1158static coro_cctx *
1159cctx_new_empty ()
1160{
1161 coro_cctx *cctx = cctx_new ();
1162
1163 cctx->sptr = 0;
1164 coro_create (&cctx->cctx, 0, 0, 0, 0);
1165
1166 return cctx;
1167}
1168
1169/* create a new cctx suitable as destination/running a perl interpreter */
1170static coro_cctx *
1171cctx_new_run ()
1172{
1173 coro_cctx *cctx = cctx_new ();
1174 void *stack_start;
1175 size_t stack_size;
1176
1177#if HAVE_MMAP
1178 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1179 /* mmap supposedly does allocate-on-write for us */
1180 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1181
1182 if (cctx->sptr != (void *)-1)
811 } 1183 {
812 UNLOCK; 1184 #if CORO_STACKGUARD
813} 1185 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1186 #endif
1187 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1188 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1189 cctx->flags |= CC_MAPPED;
1190 }
1191 else
1192#endif
1193 {
1194 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1195 New (0, cctx->sptr, cctx_stacksize, long);
814 1196
815#define SV_CORO(sv,func) \ 1197 if (!cctx->sptr)
816 do { \ 1198 {
817 if (SvROK (sv)) \ 1199 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
818 sv = SvRV (sv); \ 1200 _exit (EXIT_FAILURE);
819 \ 1201 }
820 if (SvTYPE (sv) == SVt_PVHV) \
821 { \
822 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823 \
824 if (!he) \
825 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826 \
827 (sv) = SvRV (HeVAL(he)); \
828 } \
829 \
830 /* must also be changed inside Coro::Cont::yield */ \
831 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833 \
834 } while(0)
835 1202
836#define SvSTATE(sv) (struct coro *)SvIV (sv) 1203 stack_start = cctx->sptr;
1204 stack_size = cctx->ssize;
1205 }
837 1206
1207 #if CORO_USE_VALGRIND
1208 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1209 #endif
1210
1211 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1212
1213 return cctx;
1214}
1215
1216static void
1217cctx_destroy (coro_cctx *cctx)
1218{
1219 if (!cctx)
1220 return;
1221
1222 --cctx_count;
1223 coro_destroy (&cctx->cctx);
1224
1225 /* coro_transfer creates new, empty cctx's */
1226 if (cctx->sptr)
1227 {
1228 #if CORO_USE_VALGRIND
1229 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1230 #endif
1231
1232#if HAVE_MMAP
1233 if (cctx->flags & CC_MAPPED)
1234 munmap (cctx->sptr, cctx->ssize);
1235 else
1236#endif
1237 Safefree (cctx->sptr);
1238 }
1239
1240 Safefree (cctx);
1241}
1242
1243/* wether this cctx should be destructed */
1244#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1245
1246static coro_cctx *
1247cctx_get (pTHX)
1248{
1249 while (expect_true (cctx_first))
1250 {
1251 coro_cctx *cctx = cctx_first;
1252 cctx_first = cctx->next;
1253 --cctx_idle;
1254
1255 if (expect_true (!CCTX_EXPIRED (cctx)))
1256 return cctx;
1257
1258 cctx_destroy (cctx);
1259 }
1260
1261 return cctx_new_run ();
1262}
1263
1264static void
1265cctx_put (coro_cctx *cctx)
1266{
1267 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1268
1269 /* free another cctx if overlimit */
1270 if (expect_false (cctx_idle >= cctx_max_idle))
1271 {
1272 coro_cctx *first = cctx_first;
1273 cctx_first = first->next;
1274 --cctx_idle;
1275
1276 cctx_destroy (first);
1277 }
1278
1279 ++cctx_idle;
1280 cctx->next = cctx_first;
1281 cctx_first = cctx;
1282}
1283
1284/** coroutine switching *****************************************************/
1285
1286static void
1287transfer_check (pTHX_ struct coro *prev, struct coro *next)
1288{
1289 /* TODO: throwing up here is considered harmful */
1290
1291 if (expect_true (prev != next))
1292 {
1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1295
1296 if (expect_false (next->flags & CF_RUNNING))
1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1298
1299 if (expect_false (next->flags & CF_DESTROYED))
1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1301
1302#if !PERL_VERSION_ATLEAST (5,10,0)
1303 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1305#endif
1306 }
1307}
1308
1309/* always use the TRANSFER macro */
1310static void NOINLINE /* noinline so we have a fixed stackframe */
1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1312{
1313 dSTACKLEVEL;
1314
1315 /* sometimes transfer is only called to set idle_sp */
1316 if (expect_false (!next))
1317 {
1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1320 }
1321 else if (expect_true (prev != next))
1322 {
1323 coro_cctx *prev__cctx;
1324
1325 if (expect_false (prev->flags & CF_NEW))
1326 {
1327 /* create a new empty/source context */
1328 prev->cctx = cctx_new_empty ();
1329 prev->flags &= ~CF_NEW;
1330 prev->flags |= CF_RUNNING;
1331 }
1332
1333 prev->flags &= ~CF_RUNNING;
1334 next->flags |= CF_RUNNING;
1335
1336 /* first get rid of the old state */
1337 save_perl (aTHX_ prev);
1338
1339 if (expect_false (next->flags & CF_NEW))
1340 {
1341 /* need to start coroutine */
1342 next->flags &= ~CF_NEW;
1343 /* setup coroutine call */
1344 coro_setup (aTHX_ next);
1345 }
1346 else
1347 load_perl (aTHX_ next);
1348
1349 prev__cctx = prev->cctx;
1350
1351 /* possibly untie and reuse the cctx */
1352 if (expect_true (
1353 prev__cctx->idle_sp == (void *)stacklevel
1354 && !(prev__cctx->flags & CC_TRACE)
1355 && !force_cctx
1356 ))
1357 {
1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1359 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1360
1361 prev->cctx = 0;
1362
1363 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1365 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1366 if (!next->cctx)
1367 next->cctx = cctx_get (aTHX);
1368
1369 cctx_put (prev__cctx);
1370 }
1371
1372 ++next->usecount;
1373
1374 if (expect_true (!next->cctx))
1375 next->cctx = cctx_get (aTHX);
1376
1377 if (expect_false (prev__cctx != next->cctx))
1378 {
1379 prev__cctx->top_env = PL_top_env;
1380 PL_top_env = next->cctx->top_env;
1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1382 }
1383
1384 transfer_tail (aTHX);
1385 }
1386}
1387
1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1390
1391/** high level stuff ********************************************************/
1392
838static void 1393static int
1394coro_state_destroy (pTHX_ struct coro *coro)
1395{
1396 if (coro->flags & CF_DESTROYED)
1397 return 0;
1398
1399 if (coro->on_destroy)
1400 coro->on_destroy (aTHX_ coro);
1401
1402 coro->flags |= CF_DESTROYED;
1403
1404 if (coro->flags & CF_READY)
1405 {
1406 /* reduce nready, as destroying a ready coro effectively unreadies it */
1407 /* alternative: look through all ready queues and remove the coro */
1408 --coro_nready;
1409 }
1410 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412
1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1414 {
1415 struct coro temp;
1416
1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418
1419 save_perl (aTHX_ &temp);
1420 load_perl (aTHX_ coro);
1421
1422 coro_destruct (aTHX_ coro);
1423
1424 load_perl (aTHX_ &temp);
1425
1426 coro->slot = 0;
1427 }
1428
1429 cctx_destroy (coro->cctx);
1430 SvREFCNT_dec (coro->args);
1431
1432 if (coro->next) coro->next->prev = coro->prev;
1433 if (coro->prev) coro->prev->next = coro->next;
1434 if (coro == coro_first) coro_first = coro->next;
1435
1436 return 1;
1437}
1438
1439static int
1440coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1441{
1442 struct coro *coro = (struct coro *)mg->mg_ptr;
1443 mg->mg_ptr = 0;
1444
1445 coro->hv = 0;
1446
1447 if (--coro->refcnt < 0)
1448 {
1449 coro_state_destroy (aTHX_ coro);
1450 Safefree (coro);
1451 }
1452
1453 return 0;
1454}
1455
1456static int
1457coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1458{
1459 struct coro *coro = (struct coro *)mg->mg_ptr;
1460
1461 ++coro->refcnt;
1462
1463 return 0;
1464}
1465
1466static MGVTBL coro_state_vtbl = {
1467 0, 0, 0, 0,
1468 coro_state_free,
1469 0,
1470#ifdef MGf_DUP
1471 coro_state_dup,
1472#else
1473# define MGf_DUP 0
1474#endif
1475};
1476
1477static void
1478prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1479{
1480 ta->prev = SvSTATE (prev_sv);
1481 ta->next = SvSTATE (next_sv);
1482 TRANSFER_CHECK (*ta);
1483}
1484
1485static void
839api_transfer(pTHX_ SV *prev, SV *next, int flags) 1486api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
840{ 1487{
841 SV_CORO (prev, "Coro::transfer"); 1488 struct coro_transfer_args ta;
842 SV_CORO (next, "Coro::transfer");
843 1489
844 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491 TRANSFER (ta, 1);
845} 1492}
846 1493
847/** Coro ********************************************************************/ 1494/** Coro ********************************************************************/
848 1495
849#define PRIO_MAX 3 1496INLINE void
850#define PRIO_HIGH 1 1497coro_enq (pTHX_ struct coro *coro)
851#define PRIO_NORMAL 0 1498{
852#define PRIO_LOW -1 1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
853#define PRIO_IDLE -3 1500}
854#define PRIO_MIN -4
855 1501
856/* for Coro.pm */ 1502INLINE SV *
857static GV *coro_current, *coro_idle; 1503coro_deq (pTHX)
858static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1504{
859static int coro_nready; 1505 int prio;
860 1506
1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1508 if (AvFILLp (coro_ready [prio]) >= 0)
1509 return av_shift (coro_ready [prio]);
1510
1511 return 0;
1512}
1513
861static void 1514static int
862coro_enq (pTHX_ SV *sv) 1515api_ready (pTHX_ SV *coro_sv)
863{ 1516{
864 if (SvTYPE (sv) == SVt_PVHV) 1517 struct coro *coro;
1518 SV *sv_hook;
1519 void (*xs_hook)(void);
1520
1521 if (SvROK (coro_sv))
1522 coro_sv = SvRV (coro_sv);
1523
1524 coro = SvSTATE (coro_sv);
1525
1526 if (coro->flags & CF_READY)
1527 return 0;
1528
1529 coro->flags |= CF_READY;
1530
1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1533
1534 coro_enq (aTHX_ coro);
1535 ++coro_nready;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
865 { 1551 }
866 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868 1552
869 prio = prio > PRIO_MAX ? PRIO_MAX 1553 if (xs_hook)
870 : prio < PRIO_MIN ? PRIO_MIN 1554 xs_hook ();
871 : prio;
872 1555
873 av_push (coro_ready [prio - PRIO_MIN], sv); 1556 return 1;
1557}
1558
1559static int
1560api_is_ready (pTHX_ SV *coro_sv)
1561{
1562 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1563}
1564
1565INLINE void
1566prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1567{
1568 SV *prev_sv, *next_sv;
1569
1570 for (;;)
1571 {
1572 next_sv = coro_deq (aTHX);
1573
1574 /* nothing to schedule: call the idle handler */
1575 if (expect_false (!next_sv))
1576 {
1577 dSP;
1578
1579 ENTER;
1580 SAVETMPS;
1581
1582 PUSHMARK (SP);
1583 PUTBACK;
1584 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1585 SPAGAIN;
1586
1587 FREETMPS;
1588 LEAVE;
1589 continue;
1590 }
1591
1592 ta->next = SvSTATE_hv (next_sv);
1593
1594 /* cannot transfer to destroyed coros, skip and look for next */
1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1596 {
1597 SvREFCNT_dec (next_sv);
1598 /* coro_nready has already been taken care of by destroy */
1599 continue;
1600 }
1601
874 coro_nready++; 1602 --coro_nready;
1603 break;
1604 }
875 1605
1606 /* free this only after the transfer */
1607 prev_sv = SvRV (coro_current);
1608 ta->prev = SvSTATE_hv (prev_sv);
1609 TRANSFER_CHECK (*ta);
1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1611 ta->next->flags &= ~CF_READY;
1612 SvRV_set (coro_current, next_sv);
1613
1614 free_coro_mortal (aTHX);
1615 coro_mortal = prev_sv;
1616}
1617
1618INLINE void
1619prepare_cede (pTHX_ struct coro_transfer_args *ta)
1620{
1621 api_ready (aTHX_ coro_current);
1622 prepare_schedule (aTHX_ ta);
1623}
1624
1625INLINE void
1626prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1627{
1628 SV *prev = SvRV (coro_current);
1629
1630 if (coro_nready)
1631 {
1632 prepare_schedule (aTHX_ ta);
1633 api_ready (aTHX_ prev);
1634 }
1635 else
1636 prepare_nop (aTHX_ ta);
1637}
1638
1639static void
1640api_schedule (pTHX)
1641{
1642 struct coro_transfer_args ta;
1643
1644 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1);
1646}
1647
1648static int
1649api_cede (pTHX)
1650{
1651 struct coro_transfer_args ta;
1652
1653 prepare_cede (aTHX_ &ta);
1654
1655 if (expect_true (ta.prev != ta.next))
1656 {
1657 TRANSFER (ta, 1);
876 return; 1658 return 1;
1659 }
1660 else
1661 return 0;
1662}
1663
1664static int
1665api_cede_notself (pTHX)
1666{
1667 if (coro_nready)
877 } 1668 {
1669 struct coro_transfer_args ta;
878 1670
879 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1671 prepare_cede_notself (aTHX_ &ta);
1672 TRANSFER (ta, 1);
1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
1678
1679static void
1680api_trace (pTHX_ SV *coro_sv, int flags)
1681{
1682 struct coro *coro = SvSTATE (coro_sv);
1683
1684 if (flags & CC_TRACE)
1685 {
1686 if (!coro->cctx)
1687 coro->cctx = cctx_new_run ();
1688 else if (!(coro->cctx->flags & CC_TRACE))
1689 croak ("cannot enable tracing on coroutine with custom stack,");
1690
1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1692 }
1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1694 {
1695 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1696
1697 if (coro->flags & CF_RUNNING)
1698 PL_runops = RUNOPS_DEFAULT;
1699 else
1700 coro->slot->runops = RUNOPS_DEFAULT;
1701 }
1702}
1703
1704/*****************************************************************************/
1705/* PerlIO::cede */
1706
1707typedef struct
1708{
1709 PerlIOBuf base;
1710 NV next, every;
1711} PerlIOCede;
1712
1713static IV
1714PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1715{
1716 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1717
1718 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1719 self->next = nvtime () + self->every;
1720
1721 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
880} 1722}
881 1723
882static SV * 1724static SV *
883coro_deq (pTHX_ int min_prio) 1725PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
884{ 1726{
885 int prio = PRIO_MAX - PRIO_MIN; 1727 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
886 1728
887 min_prio -= PRIO_MIN; 1729 return newSVnv (self->every);
888 if (min_prio < 0) 1730}
889 min_prio = 0;
890 1731
891 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1732static IV
892 if (av_len (coro_ready[prio]) >= 0) 1733PerlIOCede_flush (pTHX_ PerlIO *f)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736 double now = nvtime ();
1737
1738 if (now >= self->next)
1739 {
1740 api_cede (aTHX);
1741 self->next = now + self->every;
1742 }
1743
1744 return PerlIOBuf_flush (aTHX_ f);
1745}
1746
1747static PerlIO_funcs PerlIO_cede =
1748{
1749 sizeof(PerlIO_funcs),
1750 "cede",
1751 sizeof(PerlIOCede),
1752 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1753 PerlIOCede_pushed,
1754 PerlIOBuf_popped,
1755 PerlIOBuf_open,
1756 PerlIOBase_binmode,
1757 PerlIOCede_getarg,
1758 PerlIOBase_fileno,
1759 PerlIOBuf_dup,
1760 PerlIOBuf_read,
1761 PerlIOBuf_unread,
1762 PerlIOBuf_write,
1763 PerlIOBuf_seek,
1764 PerlIOBuf_tell,
1765 PerlIOBuf_close,
1766 PerlIOCede_flush,
1767 PerlIOBuf_fill,
1768 PerlIOBase_eof,
1769 PerlIOBase_error,
1770 PerlIOBase_clearerr,
1771 PerlIOBase_setlinebuf,
1772 PerlIOBuf_get_base,
1773 PerlIOBuf_bufsiz,
1774 PerlIOBuf_get_ptr,
1775 PerlIOBuf_get_cnt,
1776 PerlIOBuf_set_ptrcnt,
1777};
1778
1779/*****************************************************************************/
1780
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP *
1791pp_restore (pTHX)
1792{
1793 int i;
1794 SV **SP = PL_stack_base + slf_ax;
1795
1796 PUSHMARK (SP);
1797
1798 EXTEND (SP, slf_argc + 1);
1799
1800 for (i = 0; i < slf_argc; ++i)
1801 PUSHs (sv_2mortal (slf_argv [i]));
1802
1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806}
1807
1808static void
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
1934
1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
893 { 1937 {
894 coro_nready--; 1938 if (sp == bot)
895 return av_shift (coro_ready[prio]); 1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
896 } 1942 }
897 1943
1944 PUTBACK;
1945 }
1946
1947 /* exception handling */
1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
1966
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (items > slf_arga)
1988 {
1989 slf_arga = items;
1990 free (slf_argv);
1991 slf_argv = malloc (slf_arga * sizeof (SV *));
1992 }
1993
1994 slf_argc = items;
1995
1996 for (i = 0; i < items; ++i)
1997 slf_argv [i] = SvREFCNT_inc (arg [i]);
1998
1999 PL_op->op_ppaddr = pp_slf;
2000 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2001
2002 PL_op = (OP *)&slf_restore;
2003}
2004
2005/*****************************************************************************/
2006
2007static void
2008coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2009{
2010 SV *count_sv = AvARRAY (av)[0];
2011 IV count = SvIVX (count_sv);
2012
2013 count += adjust;
2014 SvIVX (count_sv) = count;
2015
2016 /* now wake up as many waiters as are expected to lock */
2017 while (count > 0 && AvFILLp (av) > 0)
2018 {
2019 SV *cb;
2020
2021 /* swap first two elements so we can shift a waiter */
2022 AvARRAY (av)[0] = AvARRAY (av)[1];
2023 AvARRAY (av)[1] = count_sv;
2024 cb = av_shift (av);
2025
2026 if (SvOBJECT (cb))
2027 api_ready (aTHX_ cb);
2028 else
2029 croak ("callbacks not yet supported");
2030
2031 SvREFCNT_dec (cb);
2032
2033 --count;
2034 }
2035}
2036
2037static void
2038coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2039{
2040 /* call $sem->adjust (0) to possibly wake up some other waiters */
2041 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2042}
2043
2044static int
2045slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2046{
2047 AV *av = (AV *)frame->data;
2048 SV *count_sv = AvARRAY (av)[0];
2049
2050 if (SvIVX (count_sv) > 0)
2051 {
2052 SvSTATE_current->on_destroy = 0;
2053 SvIVX (count_sv) = SvIVX (count_sv) - 1;
898 return 0; 2054 return 0;
899} 2055 }
2056 else
2057 {
2058 int i;
2059 /* if we were woken up but can't down, we look through the whole */
2060 /* waiters list and only add us if we aren't in there already */
2061 /* this avoids some degenerate memory usage cases */
900 2062
901static void 2063 for (i = 1; i <= AvFILLp (av); ++i)
902api_ready (SV *coro) 2064 if (AvARRAY (av)[i] == SvRV (coro_current))
903{ 2065 return 1;
904 dTHX;
905 2066
906 if (SvROK (coro)) 2067 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
907 coro = SvRV (coro); 2068 return 1;
908 2069 }
909 LOCK;
910 coro_enq (aTHX_ SvREFCNT_inc (coro));
911 UNLOCK;
912} 2070}
913 2071
914static void 2072static void
915api_schedule (void) 2073slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
916{ 2074{
917 dTHX; 2075 AV *av = (AV *)SvRV (arg [0]);
918 2076
919 SV *prev, *next; 2077 if (SvIVX (AvARRAY (av)[0]) > 0)
2078 {
2079 frame->data = (void *)av;
2080 frame->prepare = prepare_nop;
2081 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2082 }
2083 else
2084 {
2085 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
920 2086
921 LOCK; 2087 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2088 frame->prepare = prepare_schedule;
922 2089
923 prev = SvRV (GvSV (coro_current)); 2090 /* to avoid race conditions when a woken-up coro gets terminated */
924 next = coro_deq (aTHX_ PRIO_MIN); 2091 /* we arrange for a temporary on_destroy that calls adjust (0) */
2092 assert (!SvSTATE_current->on_destroy);//D
2093 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2094 }
925 2095
926 if (!next) 2096 frame->check = slf_check_semaphore_down;
927 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
928 2097
929 /* free this only after the transfer */
930 coro_mortal = prev;
931 SV_CORO (prev, "Coro::schedule");
932
933 SvRV (GvSV (coro_current)) = next;
934
935 SV_CORO (next, "Coro::schedule");
936
937 UNLOCK;
938
939 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
940 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941} 2098}
942 2099
943static void 2100/*****************************************************************************/
944api_cede (void)
945{
946 dTHX;
947 2101
948 LOCK; 2102#define GENSUB_ARG CvXSUBANY (cv).any_ptr
949 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
950 UNLOCK;
951 2103
952 api_schedule (); 2104/* create a closure from XS, returns a code reference */
953} 2105/* the arg can be accessed via GENSUB_ARG from the callback */
2106/* the callback must use dXSARGS/XSRETURN */
2107static SV *
2108gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2109{
2110 CV *cv = (CV *)NEWSV (0, 0);
954 2111
2112 sv_upgrade ((SV *)cv, SVt_PVCV);
2113
2114 CvANON_on (cv);
2115 CvISXSUB_on (cv);
2116 CvXSUB (cv) = xsub;
2117 GENSUB_ARG = arg;
2118
2119 return newRV_noinc ((SV *)cv);
2120}
2121
2122/*****************************************************************************/
2123
955MODULE = Coro::State PACKAGE = Coro::State 2124MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956 2125
957PROTOTYPES: ENABLE 2126PROTOTYPES: DISABLE
958 2127
959BOOT: 2128BOOT:
960{ /* {} necessary for stoopid perl-5.6.x */ 2129{
961#ifdef USE_ITHREADS 2130#ifdef USE_ITHREADS
962 MUTEX_INIT (&coro_mutex); 2131# if CORO_PTHREAD
2132 coro_thx = PERL_GET_CONTEXT;
963#endif 2133# endif
2134#endif
2135 BOOT_PAGESIZE;
964 2136
965 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2137 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
966 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2138 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2139
2140 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2141 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2142 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2143
2144 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2145 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2146 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2147
967 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2148 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968 2149
969 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2150 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
970 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2151 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
971 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2152 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
972 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2153 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
973 2154
974 main_mainstack = PL_mainstack; 2155 main_mainstack = PL_mainstack;
2156 main_top_env = PL_top_env;
975 2157
2158 while (main_top_env->je_prev)
2159 main_top_env = main_top_env->je_prev;
2160
2161 {
2162 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2163
2164 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2165 hv_store_ent (PL_custom_op_names, slf,
2166 newSVpv ("coro_slf", 0), 0);
2167
2168 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2169 hv_store_ent (PL_custom_op_descs, slf,
2170 newSVpv ("coro schedule like function", 0), 0);
2171 }
2172
976 coroapi.ver = CORO_API_VERSION; 2173 coroapi.ver = CORO_API_VERSION;
2174 coroapi.rev = CORO_API_REVISION;
2175
977 coroapi.transfer = api_transfer; 2176 coroapi.transfer = api_transfer;
978}
979 2177
980Coro::State 2178 coroapi.sv_state = SvSTATE_;
981_newprocess(args) 2179 coroapi.execute_slf = api_execute_slf;
982 SV * args 2180 coroapi.prepare_nop = prepare_nop;
983 PROTOTYPE: $ 2181 coroapi.prepare_schedule = prepare_schedule;
2182 coroapi.prepare_cede = prepare_cede;
2183 coroapi.prepare_cede_notself = prepare_cede_notself;
2184
2185 {
2186 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2187
2188 if (!svp) croak ("Time::HiRes is required");
2189 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2190
2191 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2192 }
2193
2194 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2195}
2196
2197SV *
2198new (char *klass, ...)
984 CODE: 2199 CODE:
985 Coro__State coro; 2200{
2201 struct coro *coro;
2202 MAGIC *mg;
2203 HV *hv;
2204 int i;
986 2205
987 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988 croak ("Coro::State::_newprocess expects an arrayref");
989
990 Newz (0, coro, 1, struct coro); 2206 Newz (0, coro, 1, struct coro);
2207 coro->args = newAV ();
2208 coro->flags = CF_NEW;
991 2209
992 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2210 if (coro_first) coro_first->prev = coro;
993 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2211 coro->next = coro_first;
994 /*coro->stack = 0;*/ 2212 coro_first = coro;
995 2213
996 /* same as JMPENV_BOOTSTRAP */ 2214 coro->hv = hv = newHV ();
997 /* we might be able to recycle start_env, but safe is safe */ 2215 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
998 /*Zero(&coro->start_env, 1, JMPENV);*/ 2216 mg->mg_flags |= MGf_DUP;
999 coro->start_env.je_ret = -1; 2217 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1000 coro->start_env.je_mustcatch = TRUE;
1001 2218
1002 RETVAL = coro; 2219 av_extend (coro->args, items - 1);
2220 for (i = 1; i < items; i++)
2221 av_push (coro->args, newSVsv (ST (i)));
2222}
1003 OUTPUT: 2223 OUTPUT:
1004 RETVAL 2224 RETVAL
1005 2225
1006void 2226void
1007transfer(prev, next, flags) 2227_set_stacklevel (...)
1008 SV *prev 2228 CODE:
1009 SV *next 2229 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1010 int flags
1011 PROTOTYPE: @
1012 CODE:
1013 PUTBACK;
1014 SV_CORO (next, "Coro::transfer");
1015 SV_CORO (prev, "Coro::transfer");
1016 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1017 SPAGAIN;
1018 2230
1019void 2231void
1020DESTROY(coro) 2232transfer (...)
1021 Coro::State coro 2233 PROTOTYPE: $$
1022 CODE: 2234 CODE:
2235 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1023 2236
1024 if (coro->mainstack && coro->mainstack != main_mainstack) 2237bool
1025 { 2238_destroy (SV *coro_sv)
1026 struct coro temp; 2239 CODE:
1027 2240 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1028 PUTBACK; 2241 OUTPUT:
1029 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 2242 RETVAL
1030 LOAD (aTHX_ coro);
1031 SPAGAIN;
1032
1033 destroy_stacks (aTHX);
1034
1035 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036 SPAGAIN;
1037
1038 coro->mainstack = 0;
1039 }
1040
1041 deallocate_stack (coro);
1042 SvREFCNT_dec (coro->args);
1043 Safefree (coro);
1044 2243
1045void 2244void
1046_exit(code) 2245_exit (int code)
1047 int code
1048 PROTOTYPE: $ 2246 PROTOTYPE: $
1049 CODE: 2247 CODE:
1050 _exit (code); 2248 _exit (code);
1051 2249
1052MODULE = Coro::State PACKAGE = Coro::Cont 2250int
2251cctx_stacksize (int new_stacksize = 0)
2252 PROTOTYPE: ;$
2253 CODE:
2254 RETVAL = cctx_stacksize;
2255 if (new_stacksize)
2256 {
2257 cctx_stacksize = new_stacksize;
2258 ++cctx_gen;
2259 }
2260 OUTPUT:
2261 RETVAL
1053 2262
1054# this is slightly dirty (should expose a c-level api) 2263int
2264cctx_max_idle (int max_idle = 0)
2265 PROTOTYPE: ;$
2266 CODE:
2267 RETVAL = cctx_max_idle;
2268 if (max_idle > 1)
2269 cctx_max_idle = max_idle;
2270 OUTPUT:
2271 RETVAL
2272
2273int
2274cctx_count ()
2275 PROTOTYPE:
2276 CODE:
2277 RETVAL = cctx_count;
2278 OUTPUT:
2279 RETVAL
2280
2281int
2282cctx_idle ()
2283 PROTOTYPE:
2284 CODE:
2285 RETVAL = cctx_idle;
2286 OUTPUT:
2287 RETVAL
1055 2288
1056void 2289void
1057yield(...) 2290list ()
1058 PROTOTYPE: @ 2291 PROTOTYPE:
2292 PPCODE:
2293{
2294 struct coro *coro;
2295 for (coro = coro_first; coro; coro = coro->next)
2296 if (coro->hv)
2297 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2298}
2299
2300void
2301call (Coro::State coro, SV *coderef)
2302 ALIAS:
2303 eval = 1
2304 CODE:
2305{
2306 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2307 {
2308 struct coro temp;
2309
2310 if (!(coro->flags & CF_RUNNING))
2311 {
2312 PUTBACK;
2313 save_perl (aTHX_ &temp);
2314 load_perl (aTHX_ coro);
2315 }
2316
2317 {
2318 dSP;
2319 ENTER;
2320 SAVETMPS;
2321 PUTBACK;
2322 PUSHSTACK;
2323 PUSHMARK (SP);
2324
2325 if (ix)
2326 eval_sv (coderef, 0);
2327 else
2328 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2329
2330 POPSTACK;
2331 SPAGAIN;
2332 FREETMPS;
2333 LEAVE;
2334 PUTBACK;
2335 }
2336
2337 if (!(coro->flags & CF_RUNNING))
2338 {
2339 save_perl (aTHX_ coro);
2340 load_perl (aTHX_ &temp);
2341 SPAGAIN;
2342 }
2343 }
2344}
2345
2346SV *
2347is_ready (Coro::State coro)
2348 PROTOTYPE: $
2349 ALIAS:
2350 is_ready = CF_READY
2351 is_running = CF_RUNNING
2352 is_new = CF_NEW
2353 is_destroyed = CF_DESTROYED
2354 CODE:
2355 RETVAL = boolSV (coro->flags & ix);
2356 OUTPUT:
2357 RETVAL
2358
2359void
2360throw (Coro::State self, SV *throw = &PL_sv_undef)
2361 PROTOTYPE: $;$
1059 CODE: 2362 CODE:
1060 SV *yieldstack; 2363{
1061 SV *sv; 2364 struct coro *current = SvSTATE_current;
1062 AV *defav = GvAV (PL_defgv); 2365 SV **throwp = self == current ? &coro_throw : &self->throw;
1063 struct coro *prev, *next; 2366 SvREFCNT_dec (*throwp);
2367 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2368}
1064 2369
1065 yieldstack = *hv_fetch ( 2370void
1066 (HV *)SvRV (GvSV (coro_current)), 2371api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1067 "yieldstack", sizeof ("yieldstack") - 1, 2372 PROTOTYPE: $;$
2373 C_ARGS: aTHX_ coro, flags
2374
2375SV *
2376has_cctx (Coro::State coro)
2377 PROTOTYPE: $
2378 CODE:
2379 RETVAL = boolSV (!!coro->cctx);
2380 OUTPUT:
2381 RETVAL
2382
2383int
2384is_traced (Coro::State coro)
2385 PROTOTYPE: $
2386 CODE:
2387 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2388 OUTPUT:
2389 RETVAL
2390
2391UV
2392rss (Coro::State coro)
2393 PROTOTYPE: $
2394 ALIAS:
2395 usecount = 1
2396 CODE:
2397 switch (ix)
2398 {
2399 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2400 case 1: RETVAL = coro->usecount; break;
1068 0 2401 }
2402 OUTPUT:
2403 RETVAL
2404
2405void
2406force_cctx ()
2407 PROTOTYPE:
2408 CODE:
2409 SvSTATE_current->cctx->idle_sp = 0;
2410
2411void
2412swap_defsv (Coro::State self)
2413 PROTOTYPE: $
2414 ALIAS:
2415 swap_defav = 1
2416 CODE:
2417 if (!self->slot)
2418 croak ("cannot swap state with coroutine that has no saved state,");
2419 else
1069 ); 2420 {
2421 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2422 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1070 2423
1071 /* set up @_ -- ugly */ 2424 SV *tmp = *src; *src = *dst; *dst = tmp;
1072 av_clear (defav); 2425 }
1073 av_fill (defav, items - 1);
1074 while (items--)
1075 av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077 sv = av_pop ((AV *)SvRV (yieldstack));
1078 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080 SvREFCNT_dec (sv);
1081
1082 transfer (aTHX_ prev, next, 0);
1083 2426
1084MODULE = Coro::State PACKAGE = Coro 2427MODULE = Coro::State PACKAGE = Coro
1085 2428
1086# this is slightly dirty (should expose a c-level api)
1087
1088BOOT: 2429BOOT:
1089{ 2430{
1090 int i; 2431 int i;
2432
2433 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2434 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2435 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2436
2437 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2438 SvREADONLY_on (coro_current);
2439
1091 HV *stash = gv_stashpv ("Coro", TRUE); 2440 coro_stash = gv_stashpv ("Coro", TRUE);
1092 2441
1093 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2442 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2443 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2444 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2445 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2446 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2447 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099
1100 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102 2448
1103 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2449 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1104 coro_ready[i] = newAV (); 2450 coro_ready[i] = newAV ();
1105 2451
1106 { 2452 {
1107 SV *sv = perl_get_sv("Coro::API", 1); 2453 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1108 2454
1109 coroapi.schedule = api_schedule; 2455 coroapi.schedule = api_schedule;
1110 coroapi.cede = api_cede; 2456 coroapi.cede = api_cede;
2457 coroapi.cede_notself = api_cede_notself;
1111 coroapi.ready = api_ready; 2458 coroapi.ready = api_ready;
2459 coroapi.is_ready = api_is_ready;
1112 coroapi.nready = &coro_nready; 2460 coroapi.nready = coro_nready;
1113 coroapi.current = coro_current; 2461 coroapi.current = coro_current;
1114 2462
1115 GCoroAPI = &coroapi; 2463 GCoroAPI = &coroapi;
1116 sv_setiv(sv, (IV)&coroapi); 2464 sv_setiv (sv, (IV)&coroapi);
1117 SvREADONLY_on(sv); 2465 SvREADONLY_on (sv);
1118 } 2466 }
1119} 2467}
1120 2468
1121#if !PERL_MICRO
1122
1123void 2469void
1124ready(self) 2470schedule (...)
1125 SV * self 2471 CODE:
2472 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2473
2474void
2475cede (...)
2476 CODE:
2477 CORO_EXECUTE_SLF_XS (slf_init_cede);
2478
2479void
2480cede_notself (...)
2481 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2483
2484void
2485_set_current (SV *current)
1126 PROTOTYPE: $ 2486 PROTOTYPE: $
1127 CODE: 2487 CODE:
1128 api_ready (self); 2488 SvREFCNT_dec (SvRV (coro_current));
2489 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1129 2490
1130#endif 2491void
2492_set_readyhook (SV *hook)
2493 PROTOTYPE: $
2494 CODE:
2495 SvREFCNT_dec (coro_readyhook);
2496 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1131 2497
1132int 2498int
2499prio (Coro::State coro, int newprio = 0)
2500 PROTOTYPE: $;$
2501 ALIAS:
2502 nice = 1
2503 CODE:
2504{
2505 RETVAL = coro->prio;
2506
2507 if (items > 1)
2508 {
2509 if (ix)
2510 newprio = coro->prio - newprio;
2511
2512 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2513 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2514
2515 coro->prio = newprio;
2516 }
2517}
2518 OUTPUT:
2519 RETVAL
2520
2521SV *
2522ready (SV *self)
2523 PROTOTYPE: $
2524 CODE:
2525 RETVAL = boolSV (api_ready (aTHX_ self));
2526 OUTPUT:
2527 RETVAL
2528
2529int
1133nready(...) 2530nready (...)
1134 PROTOTYPE: 2531 PROTOTYPE:
1135 CODE: 2532 CODE:
1136 RETVAL = coro_nready; 2533 RETVAL = coro_nready;
1137 OUTPUT: 2534 OUTPUT:
1138 RETVAL 2535 RETVAL
1139 2536
2537# for async_pool speedup
1140void 2538void
1141schedule(...) 2539_pool_1 (SV *cb)
1142 PROTOTYPE:
1143 CODE: 2540 CODE:
1144 api_schedule (); 2541{
2542 HV *hv = (HV *)SvRV (coro_current);
2543 struct coro *coro = SvSTATE_hv ((SV *)hv);
2544 AV *defav = GvAV (PL_defgv);
2545 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2546 AV *invoke_av;
2547 int i, len;
2548
2549 if (!invoke)
2550 {
2551 SV *old = PL_diehook;
2552 PL_diehook = 0;
2553 SvREFCNT_dec (old);
2554 croak ("\3async_pool terminate\2\n");
2555 }
2556
2557 SvREFCNT_dec (coro->saved_deffh);
2558 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2559
2560 hv_store (hv, "desc", sizeof ("desc") - 1,
2561 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2562
2563 invoke_av = (AV *)SvRV (invoke);
2564 len = av_len (invoke_av);
2565
2566 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2567
2568 if (len > 0)
2569 {
2570 av_fill (defav, len - 1);
2571 for (i = 0; i < len; ++i)
2572 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2573 }
2574}
1145 2575
1146void 2576void
1147cede(...) 2577_pool_2 (SV *cb)
1148 PROTOTYPE:
1149 CODE: 2578 CODE:
2579{
2580 HV *hv = (HV *)SvRV (coro_current);
2581 struct coro *coro = SvSTATE_hv ((SV *)hv);
2582
2583 sv_setsv (cb, &PL_sv_undef);
2584
2585 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2586 coro->saved_deffh = 0;
2587
2588 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2589 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2590 {
2591 SV *old = PL_diehook;
2592 PL_diehook = 0;
2593 SvREFCNT_dec (old);
2594 croak ("\3async_pool terminate\2\n");
2595 }
2596
2597 av_clear (GvAV (PL_defgv));
2598 hv_store (hv, "desc", sizeof ("desc") - 1,
2599 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2600
2601 coro->prio = 0;
2602
2603 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2604 api_trace (aTHX_ coro_current, 0);
2605
2606 av_push (av_async_pool, newSVsv (coro_current));
2607}
2608
2609
2610MODULE = Coro::State PACKAGE = Coro::AIO
2611
2612void
2613_get_state (SV *self)
2614 PROTOTYPE: $
2615 PPCODE:
2616{
2617 AV *defav = GvAV (PL_defgv);
2618 AV *av = newAV ();
2619 int i;
2620 SV *data_sv = newSV (sizeof (struct io_state));
2621 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2622 SvCUR_set (data_sv, sizeof (struct io_state));
2623 SvPOK_only (data_sv);
2624
2625 data->errorno = errno;
2626 data->laststype = PL_laststype;
2627 data->laststatval = PL_laststatval;
2628 data->statcache = PL_statcache;
2629
2630 av_extend (av, AvFILLp (defav) + 1 + 1);
2631
2632 for (i = 0; i <= AvFILLp (defav); ++i)
2633 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2634
2635 av_push (av, data_sv);
2636
2637 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2638
2639 api_ready (aTHX_ self);
2640}
2641
2642void
2643_set_state (SV *state)
2644 PROTOTYPE: $
2645 PPCODE:
2646{
2647 AV *av = (AV *)SvRV (state);
2648 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2649 int i;
2650
2651 errno = data->errorno;
2652 PL_laststype = data->laststype;
2653 PL_laststatval = data->laststatval;
2654 PL_statcache = data->statcache;
2655
2656 EXTEND (SP, AvFILLp (av));
2657 for (i = 0; i < AvFILLp (av); ++i)
2658 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2659}
2660
2661
2662MODULE = Coro::State PACKAGE = Coro::AnyEvent
2663
2664BOOT:
2665 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2666
2667void
2668_schedule (...)
2669 CODE:
2670{
2671 static int incede;
2672
1150 api_cede (); 2673 api_cede_notself (aTHX);
1151 2674
1152# and these are hacks 2675 ++incede;
2676 while (coro_nready >= incede && api_cede (aTHX))
2677 ;
2678
2679 sv_setsv (sv_activity, &PL_sv_undef);
2680 if (coro_nready >= incede)
2681 {
2682 PUSHMARK (SP);
2683 PUTBACK;
2684 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2685 SPAGAIN;
2686 }
2687
2688 --incede;
2689}
2690
2691
2692MODULE = Coro::State PACKAGE = PerlIO::cede
2693
2694BOOT:
2695 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2696
2697MODULE = Coro::State PACKAGE = Coro::Semaphore
2698
1153SV * 2699SV *
1154_aio_get_state () 2700new (SV *klass, SV *count_ = 0)
1155 CODE: 2701 CODE:
1156{ 2702{
1157 struct { 2703 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1158 int errorno; 2704 AV *av = newAV ();
1159 int laststype; 2705 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1160 int laststatval; 2706 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1161 Stat_t statcache;
1162 } data;
1163
1164 data.errorno = errno;
1165 data.laststype = PL_laststype;
1166 data.laststatval = PL_laststatval;
1167 data.statcache = PL_statcache;
1168
1169 RETVAL = newSVpvn ((char *)&data, sizeof data);
1170} 2707}
1171 OUTPUT: 2708 OUTPUT:
1172 RETVAL 2709 RETVAL
1173 2710
2711SV *
2712count (SV *self)
2713 CODE:
2714 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2715 OUTPUT:
2716 RETVAL
2717
1174void 2718void
1175_aio_set_state (char *data_) 2719up (SV *self, int adjust = 1)
1176 PROTOTYPE: $ 2720 ALIAS:
2721 adjust = 1
2722 CODE:
2723 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2724
2725void
2726down (SV *self)
2727 CODE:
2728 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2729
2730void
2731try (SV *self)
2732 PPCODE:
2733{
2734 AV *av = (AV *)SvRV (self);
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 if (count > 0)
2739 {
2740 --count;
2741 SvIVX (count_sv) = count;
2742 XSRETURN_YES;
2743 }
2744 else
2745 XSRETURN_NO;
2746}
2747
2748void
2749waiters (SV *self)
1177 CODE: 2750 CODE:
1178{ 2751{
1179 struct { 2752 AV *av = (AV *)SvRV (self);
2753
2754 if (GIMME_V == G_SCALAR)
2755 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2756 else
2757 {
1180 int errorno; 2758 int i;
1181 int laststype; 2759 EXTEND (SP, AvFILLp (av) + 1 - 1);
1182 int laststatval; 2760 for (i = 1; i <= AvFILLp (av); ++i)
1183 Stat_t statcache; 2761 PUSHs (newSVsv (AvARRAY (av)[i]));
1184 } *data = (void *)data_; 2762 }
1185
1186 errno = data->errorno;
1187 PL_laststype = data->laststype;
1188 PL_laststatval = data->laststatval;
1189 PL_statcache = data->statcache;
1190} 2763}
2764

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