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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC vs.
Revision 1.281 by root, Sun Nov 16 10:12:38 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 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
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# 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
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
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
29#define dSTACKLEVEL void *stacklevel = &stacklevel 124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
30 126
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 128
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 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))
34 143
35#include "CoroAPI.h" 144#include "CoroAPI.h"
36 145
146#ifdef USE_ITHREADS
147# if CORO_PTHREAD
148static void *coro_thx;
149# endif
150#endif
151
152/* helper storage struct for Coro::AIO */
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};
161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
38 172
39/* this is actually not only the c stack but also c registers etc... */ 173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
186
187static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle;
189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
199/* this is a structure representing a c-level coroutine */
40typedef struct { 200typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 201{
42 int usecnt; /* shared by how many coroutines */ 202 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 203
204 /* the stack */
205 void *sptr;
206 size_t ssize;
207
208 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env;
45 coro_context cctx; 212 coro_context cctx;
46 213
47 void *sptr; 214 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 215#if CORO_USE_VALGRIND
49} coro_stack; 216 int valgrind_id;
217#endif
218 unsigned char flags;
219} coro_cctx;
50 220
221enum {
222 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
226};
227
228/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct
230{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
51struct coro { 243struct coro {
52 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 244 /* the C coroutine allocated to this perl coroutine, if any */
53 JMPENV start_env; 245 coro_cctx *cctx;
54 246
55 /* the optional C context */ 247 /* process data */
56 coro_stack *stack; 248 struct CoroSLF slf_frame; /* saved slf frame */
57 void *cursp;
58 int gencnt;
59
60 /* optionally saved, might be zero */
61 AV *defav;
62 SV *defsv;
63 SV *errsv;
64
65 /* saved global state not related to stacks */
66 U8 dowarn;
67 I32 in_eval;
68
69 /* the stacks and related info (callchain etc..) */
70 PERL_SI *curstackinfo;
71 AV *curstack;
72 AV *mainstack; 249 AV *mainstack;
73 SV **stack_sp; 250 perl_slots *slot; /* basically the saved sp */
74 OP *op;
75 SV **curpad;
76 AV *comppad;
77 SV **stack_base;
78 SV **stack_max;
79 SV **tmps_stack;
80 I32 tmps_floor;
81 I32 tmps_ix;
82 I32 tmps_max;
83 I32 *markstack;
84 I32 *markstack_ptr;
85 I32 *markstack_max;
86 I32 *scopestack;
87 I32 scopestack_ix;
88 I32 scopestack_max;
89 ANY *savestack;
90 I32 savestack_ix;
91 I32 savestack_max;
92 OP **retstack;
93 I32 retstack_ix;
94 I32 retstack_max;
95 COP *curcop;
96 JMPENV *top_env;
97 251
98 /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
99 AV *args; 253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
260
261 /* coro process data */
262 int prio;
263 SV *throw; /* exception to be thrown */
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
100}; 270};
101 271
102typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
103typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
104 274
105static AV *main_mainstack; /* used to differentiate between $main and others */ 275static struct CoroSLF slf_frame; /* the current slf frame */
106static HV *coro_state_stash;
107static SV *ucoro_state_sv;
108static U32 ucoro_state_hash;
109static HV *padlist_cache;
110static SV *coro_mortal; /* will be freed after next transfer */
111
112/* mostly copied from op.c:cv_clone2 */
113STATIC AV *
114clone_padlist (AV *protopadlist)
115{
116 AV *av;
117 I32 ix;
118 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
119 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
120 SV **pname = AvARRAY (protopad_name);
121 SV **ppad = AvARRAY (protopad);
122 I32 fname = AvFILLp (protopad_name);
123 I32 fpad = AvFILLp (protopad);
124 AV *newpadlist, *newpad_name, *newpad;
125 SV **npad;
126
127 newpad_name = newAV ();
128 for (ix = fname; ix >= 0; ix--)
129 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
130
131 newpad = newAV ();
132 av_fill (newpad, AvFILLp (protopad));
133 npad = AvARRAY (newpad);
134
135 newpadlist = newAV ();
136 AvREAL_off (newpadlist);
137 av_store (newpadlist, 0, (SV *) newpad_name);
138 av_store (newpadlist, 1, (SV *) newpad);
139
140 av = newAV (); /* will be @_ */
141 av_extend (av, 0);
142 av_store (newpad, 0, (SV *) av);
143 AvFLAGS (av) = AVf_REIFY;
144
145 for (ix = fpad; ix > 0; ix--)
146 {
147 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
148 if (namesv && namesv != &PL_sv_undef)
149 {
150 char *name = SvPVX (namesv); /* XXX */
151 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
152 { /* lexical from outside? */
153 npad[ix] = SvREFCNT_inc (ppad[ix]);
154 }
155 else
156 { /* our own lexical */
157 SV *sv;
158 if (*name == '&')
159 sv = SvREFCNT_inc (ppad[ix]);
160 else if (*name == '@')
161 sv = (SV *) newAV ();
162 else if (*name == '%')
163 sv = (SV *) newHV ();
164 else
165 sv = NEWSV (0, 0);
166 if (!SvPADBUSY (sv))
167 SvPADMY_on (sv);
168 npad[ix] = sv;
169 }
170 }
171 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
172 {
173 npad[ix] = SvREFCNT_inc (ppad[ix]);
174 }
175 else
176 {
177 SV *sv = NEWSV (0, 0);
178 SvPADTMP_on (sv);
179 npad[ix] = sv;
180 }
181 }
182
183#if 0 /* return -ENOTUNDERSTOOD */
184 /* Now that vars are all in place, clone nested closures. */
185
186 for (ix = fpad; ix > 0; ix--) {
187 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
188 if (namesv
189 && namesv != &PL_sv_undef
190 && !(SvFLAGS(namesv) & SVf_FAKE)
191 && *SvPVX(namesv) == '&'
192 && CvCLONE(ppad[ix]))
193 {
194 CV *kid = cv_clone((CV*)ppad[ix]);
195 SvREFCNT_dec(ppad[ix]);
196 CvCLONE_on(kid);
197 SvPADMY_on(kid);
198 npad[ix] = (SV*)kid;
199 }
200 }
201#endif
202
203 return newpadlist;
204}
205
206#ifdef MAY_FLUSH
207STATIC void
208free_padlist (AV *padlist)
209{
210 /* may be during global destruction */
211 if (SvREFCNT(padlist))
212 {
213 I32 i = AvFILLp(padlist);
214 while (i >= 0)
215 {
216 SV **svp = av_fetch(padlist, i--, FALSE);
217 SV *sv = svp ? *svp : Nullsv;
218 if (sv)
219 SvREFCNT_dec(sv);
220 }
221
222 SvREFCNT_dec((SV*)padlist);
223 }
224}
225#endif
226
227/* the next two functions merely cache the padlists */
228STATIC void
229get_padlist (CV *cv)
230{
231 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
232
233 if (he && AvFILLp ((AV *)*he) >= 0)
234 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
235 else
236 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
237}
238
239STATIC void
240put_padlist (CV *cv)
241{
242 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
243
244 if (SvTYPE (*he) != SVt_PVAV)
245 {
246 SvREFCNT_dec (*he);
247 *he = (SV *)newAV ();
248 }
249
250 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
251}
252
253#ifdef MAY_FLUSH
254STATIC void
255flush_padlist_cache ()
256{
257 HV *hv = padlist_cache;
258 padlist_cache = newHV ();
259
260 if (hv_iterinit (hv))
261 {
262 HE *he;
263 AV *padlist;
264
265 while (!!(he = hv_iternext (hv)))
266 {
267 AV *av = (AV *)HeVAL(he);
268
269 /* casting is fun. */
270 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
271 free_padlist (padlist);
272 }
273 }
274
275 SvREFCNT_dec (hv);
276}
277#endif
278
279#define SB do {
280#define SE } while (0)
281
282#define LOAD(state) load_state(aTHX_ (state));
283#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
286
287static void
288load_state(pTHX_ Coro__State c)
289{
290 PL_dowarn = c->dowarn;
291 PL_in_eval = c->in_eval;
292
293 PL_curstackinfo = c->curstackinfo;
294 PL_curstack = c->curstack;
295 PL_mainstack = c->mainstack;
296 PL_stack_sp = c->stack_sp;
297 PL_op = c->op;
298 PL_curpad = c->curpad;
299 PL_comppad = c->comppad;
300 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix;
305 PL_tmps_max = c->tmps_max;
306 PL_markstack = c->markstack;
307 PL_markstack_ptr = c->markstack_ptr;
308 PL_markstack_max = c->markstack_max;
309 PL_scopestack = c->scopestack;
310 PL_scopestack_ix = c->scopestack_ix;
311 PL_scopestack_max = c->scopestack_max;
312 PL_savestack = c->savestack;
313 PL_savestack_ix = c->savestack_ix;
314 PL_savestack_max = c->savestack_max;
315 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max;
318 PL_curcop = c->curcop;
319 PL_top_env = c->top_env;
320
321 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
322 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
323 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
324
325 {
326 dSP;
327 CV *cv;
328
329 /* now do the ugly restore mess */
330 while ((cv = (CV *)POPs))
331 {
332 AV *padlist = (AV *)POPs;
333
334 if (padlist)
335 {
336 put_padlist (cv); /* mark this padlist as available */
337 CvPADLIST(cv) = padlist;
338#ifdef USE_THREADS
339 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
340#endif
341 }
342
343 ++CvDEPTH(cv);
344 }
345
346 PUTBACK;
347 }
348}
349
350static void
351save_state(pTHX_ Coro__State c, int flags)
352{
353 {
354 dSP;
355 I32 cxix = cxstack_ix;
356 PERL_CONTEXT *ccstk = cxstack;
357 PERL_SI *top_si = PL_curstackinfo;
358
359 /*
360 * the worst thing you can imagine happens first - we have to save
361 * (and reinitialize) all cv's in the whole callchain :(
362 */
363
364 PUSHs (Nullsv);
365 /* this loop was inspired by pp_caller */
366 for (;;)
367 {
368 while (cxix >= 0)
369 {
370 PERL_CONTEXT *cx = &ccstk[cxix--];
371
372 if (CxTYPE(cx) == CXt_SUB)
373 {
374 CV *cv = cx->blk_sub.cv;
375 if (CvDEPTH(cv))
376 {
377#ifdef USE_THREADS
378 /*XPUSHs ((SV *)CvOWNER(cv));*/
379 /*CvOWNER(cv) = 0;*/
380 /*error must unlock this cv etc.. etc...*/
381#endif
382 EXTEND (SP, CvDEPTH(cv)*2);
383
384 while (--CvDEPTH(cv))
385 {
386 /* this tells the restore code to increment CvDEPTH */
387 PUSHs (Nullsv);
388 PUSHs ((SV *)cv);
389 }
390
391 PUSHs ((SV *)CvPADLIST(cv));
392 PUSHs ((SV *)cv);
393
394 get_padlist (cv); /* this is a monster */
395 }
396 }
397 else if (CxTYPE(cx) == CXt_FORMAT)
398 {
399 /* I never used formats, so how should I know how these are implemented? */
400 /* my bold guess is as a simple, plain sub... */
401 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
402 }
403 }
404
405 if (top_si->si_type == PERLSI_MAIN)
406 break;
407
408 top_si = top_si->si_prev;
409 ccstk = top_si->si_cxstack;
410 cxix = top_si->si_cxix;
411 }
412
413 PUTBACK;
414 }
415
416 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
417 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
418 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
419
420 c->dowarn = PL_dowarn;
421 c->in_eval = PL_in_eval;
422
423 c->curstackinfo = PL_curstackinfo;
424 c->curstack = PL_curstack;
425 c->mainstack = PL_mainstack;
426 c->stack_sp = PL_stack_sp;
427 c->op = PL_op;
428 c->curpad = PL_curpad;
429 c->comppad = PL_comppad;
430 c->stack_base = PL_stack_base;
431 c->stack_max = PL_stack_max;
432 c->tmps_stack = PL_tmps_stack;
433 c->tmps_floor = PL_tmps_floor;
434 c->tmps_ix = PL_tmps_ix;
435 c->tmps_max = PL_tmps_max;
436 c->markstack = PL_markstack;
437 c->markstack_ptr = PL_markstack_ptr;
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->top_env = PL_top_env;
450}
451
452/*
453 * allocate various perl stacks. This is an exact copy
454 * of perl.c:init_stacks, except that it uses less memory
455 * on the assumption that coroutines do not usually need
456 * a lot of stackspace.
457 */
458STATIC void
459coro_init_stacks (pTHX)
460{
461 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
462 PL_curstackinfo->si_type = PERLSI_MAIN;
463 PL_curstack = PL_curstackinfo->si_stack;
464 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
465
466 PL_stack_base = AvARRAY(PL_curstack);
467 PL_stack_sp = PL_stack_base;
468 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
469
470 New(50,PL_tmps_stack,96,SV*);
471 PL_tmps_floor = -1;
472 PL_tmps_ix = -1;
473 PL_tmps_max = 96;
474
475 New(54,PL_markstack,16,I32);
476 PL_markstack_ptr = PL_markstack;
477 PL_markstack_max = PL_markstack + 16;
478
479 SET_MARK_OFFSET;
480
481 New(54,PL_scopestack,16,I32);
482 PL_scopestack_ix = 0;
483 PL_scopestack_max = 16;
484
485 New(54,PL_savestack,96,ANY);
486 PL_savestack_ix = 0;
487 PL_savestack_max = 96;
488
489 New(54,PL_retstack,8,OP*);
490 PL_retstack_ix = 0;
491 PL_retstack_max = 8;
492}
493
494/*
495 * destroy the stacks, the callchain etc...
496 * still there is a memleak of 128 bytes...
497 */
498STATIC void
499destroy_stacks(pTHX)
500{
501 if (!IN_DESTRUCT)
502 {
503 /* is this ugly, I ask? */
504 while (PL_scopestack_ix)
505 LEAVE;
506
507 /* sure it is, but more important: is it correct?? :/ */
508 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
509 FREETMPS;
510 }
511
512 while (PL_curstackinfo->si_next)
513 PL_curstackinfo = PL_curstackinfo->si_next;
514
515 while (PL_curstackinfo)
516 {
517 PERL_SI *p = PL_curstackinfo->si_prev;
518
519 {
520 dSP;
521 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
522 PUTBACK; /* possibly superfluous */
523 }
524
525 if (!IN_DESTRUCT)
526 {
527 dounwind(-1);
528 SvREFCNT_dec(PL_curstackinfo->si_stack);
529 }
530
531 Safefree(PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo);
533 PL_curstackinfo = p;
534 }
535
536 Safefree(PL_tmps_stack);
537 Safefree(PL_markstack);
538 Safefree(PL_scopestack);
539 Safefree(PL_savestack);
540 Safefree(PL_retstack);
541}
542
543static void
544allocate_stack (Coro__State ctx, int alloc)
545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
555#if HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif
560 {
561 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long);
563 New (0, stack->sptr, 4096, long);
564 }
565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
570}
571
572static void
573deallocate_stack (Coro__State ctx)
574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
583#ifdef HAVE_MMAP
584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
587#else
588 Safefree (stack->sptr);
589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
595}
596
597static void
598setup_coro (void *arg)
599{
600 /*
601 * emulate part of the perl startup here.
602 */
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX);
608 /*PL_curcop = 0;*/
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */
610 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args;
612
613 SPAGAIN;
614
615 if (ctx->stack)
616 {
617 ctx->cursp = 0;
618
619 PUSHMARK(SP);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
626 croak ("FATAL: CCTXT coroutine returned!");
627 }
628 else
629 {
630 UNOP myop;
631
632 PL_op = (OP *)&myop;
633
634 Zero(&myop, 1, UNOP);
635 myop.op_next = Nullop;
636 myop.op_flags = OPf_WANT_VOID;
637
638 PUSHMARK(SP);
639 XPUSHs (sub_init);
640 /*
641 * the next line is slightly wrong, as PL_op->op_next
642 * is actually being executed so we skip the first op.
643 * that doesn't matter, though, since it is only
644 * pp_nextstate and we never return...
645 * ah yes, and I don't care anyways ;)
646 */
647 PUTBACK;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN;
650
651 ENTER; /* necessary e.g. for dounwind */
652 }
653}
654
655static void
656continue_coro (void *arg)
657{
658 /*
659 * this is a _very_ stripped down perl interpreter ;)
660 */
661 Coro__State ctx = (Coro__State)arg;
662 JMPENV coro_start_env;
663
664 PL_top_env = &ctx->start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677 static struct coro *xnext;
678
679 if (prev != next)
680 {
681 xnext = next;
682
683 if (next->mainstack)
684 {
685 SAVE (prev, flags);
686 LOAD (next);
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 {
695 if (!prev->stack)
696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
716 }
717
718 }
719 else if (next->tmps_ix == -2)
720 croak ("tried to transfer to running coroutine");
721 else
722 {
723 SAVE (prev, -1); /* first get rid of the old state */
724
725 if (flags & TRANSFER_SAVE_CCTXT)
726 {
727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731 {
732 PL_top_env = &next->start_env;
733
734 setup_coro (next);
735
736 prev->stack->refcnt++;
737 prev->stack->usecnt++;
738 next->stack = prev->stack;
739 next->gencnt = prev->gencnt;
740 }
741 else
742 {
743 allocate_stack (next, 1);
744 coro_create (&(next->stack->cctx),
745 setup_coro, (void *)next,
746 next->stack->sptr, labs (next->stack->ssize));
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 /* don't add any code here */
749 }
750 }
751 else
752 setup_coro (next);
753 }
754
755 /*
756 * xnext is now either prev or next, depending on wether
757 * we switched the c stack or not. that's why I use a global
758 * variable, that should become thread-specific at one point.
759 */
760 xnext->cursp = stacklevel;
761 }
762
763 if (coro_mortal)
764 {
765 SvREFCNT_dec (coro_mortal);
766 coro_mortal = 0;
767 }
768}
769
770#define SV_CORO(sv,func) \
771 do { \
772 if (SvROK (sv)) \
773 sv = SvRV (sv); \
774 \
775 if (SvTYPE(sv) == SVt_PVHV) \
776 { \
777 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778 \
779 if (!he) \
780 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781 \
782 (sv) = SvRV (HeVAL(he)); \
783 } \
784 \
785 /* must also be changed inside Coro::Cont::yield */ \
786 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788 \
789 } while(0)
790
791#define SvSTATE(sv) (struct coro *)SvIV (sv)
792
793static void
794api_transfer(pTHX_ SV *prev, SV *next, int flags)
795{
796 SV_CORO (prev, "Coro::transfer");
797 SV_CORO (next, "Coro::transfer");
798
799 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
800}
801 276
802/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
803 278
804#define PRIO_MAX 3 279#define PRIO_MAX 3
805#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
807#define PRIO_LOW -1 282#define PRIO_LOW -1
808#define PRIO_IDLE -3 283#define PRIO_IDLE -3
809#define PRIO_MIN -4 284#define PRIO_MIN -4
810 285
811/* for Coro.pm */ 286/* for Coro.pm */
812static GV *coro_current, *coro_idle; 287static SV *coro_current;
288static SV *coro_readyhook;
813static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
814static int coro_nready; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
815 292
816static void 293/** lowlevel stuff **********************************************************/
817coro_enq (SV *sv)
818{
819 if (SvTYPE (sv) == SVt_PVHV)
820 {
821 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824 prio = prio > PRIO_MAX ? PRIO_MAX
825 : prio < PRIO_MIN ? PRIO_MIN
826 : prio;
827
828 av_push (coro_ready [prio - PRIO_MIN], sv);
829 coro_nready++;
830
831 return;
832 }
833
834 croak ("Coro::ready tried to enqueue something that is not a coroutine");
835}
836 294
837static SV * 295static SV *
838coro_deq (int min_prio) 296coro_get_sv (pTHX_ const char *name, int create)
839{ 297{
840 int prio = PRIO_MAX - PRIO_MIN; 298#if PERL_VERSION_ATLEAST (5,10,0)
299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
300 get_sv (name, create);
301#endif
302 return get_sv (name, create);
303}
841 304
842 min_prio -= PRIO_MIN; 305static AV *
843 if (min_prio < 0) 306coro_get_av (pTHX_ const char *name, int create)
844 min_prio = 0; 307{
308#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create);
311#endif
312 return get_av (name, create);
313}
845 314
846 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 315static HV *
847 if (av_len (coro_ready[prio]) >= 0) 316coro_get_hv (pTHX_ const char *name, int create)
317{
318#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create);
321#endif
322 return get_hv (name, create);
323}
324
325static AV *
326coro_clone_padlist (pTHX_ CV *cv)
327{
328 AV *padlist = CvPADLIST (cv);
329 AV *newpadlist, *newpad;
330
331 newpadlist = newAV ();
332 AvREAL_off (newpadlist);
333#if PERL_VERSION_ATLEAST (5,10,0)
334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
335#else
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
337#endif
338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
339 --AvFILLp (padlist);
340
341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
342 av_store (newpadlist, 1, (SV *)newpad);
343
344 return newpadlist;
345}
346
347static void
348free_padlist (pTHX_ AV *padlist)
349{
350 /* may be during global destruction */
351 if (SvREFCNT (padlist))
352 {
353 I32 i = AvFILLp (padlist);
354 while (i >= 0)
848 { 355 {
849 coro_nready--; 356 SV **svp = av_fetch (padlist, i--, FALSE);
850 return av_shift (coro_ready[prio]); 357 if (svp)
358 {
359 SV *sv;
360 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
361 SvREFCNT_dec (sv);
362
363 SvREFCNT_dec (*svp);
364 }
851 } 365 }
366
367 SvREFCNT_dec ((SV*)padlist);
368 }
369}
370
371static int
372coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
373{
374 AV *padlist;
375 AV *av = (AV *)mg->mg_obj;
376
377 /* casting is fun. */
378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
379 free_padlist (aTHX_ padlist);
380
381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
852 382
853 return 0; 383 return 0;
854} 384}
855 385
856static void 386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
857api_ready (SV *coro) 387#define CORO_MAGIC_type_state PERL_MAGIC_ext
388
389static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0,
391 coro_cv_free
392};
393
394#define CORO_MAGIC(sv, type) \
395 expect_true (SvMAGIC (sv)) \
396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
397 ? SvMAGIC (sv) \
398 : mg_find (sv, type) \
399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
858{ 406{
407 HV *stash;
408 MAGIC *mg;
409
859 if (SvROK (coro)) 410 if (SvROK (coro))
860 coro = SvRV (coro); 411 coro = SvRV (coro);
861 412
862 coro_enq (SvREFCNT_inc (coro)); 413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
863} 414 croak ("Coro::State object required");
864 415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
442
443/* the next two functions merely cache the padlists */
444static void
445get_padlist (pTHX_ CV *cv)
446{
447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
449
450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
452 else
453 {
454#if CORO_PREFER_PERL_FUNCTIONS
455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
457 CV *cp = Perl_cv_clone (cv);
458 CvPADLIST (cv) = CvPADLIST (cp);
459 CvPADLIST (cp) = 0;
460 SvREFCNT_dec (cp);
461#else
462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
463#endif
464 }
465}
466
467static void
468put_padlist (pTHX_ CV *cv)
469{
470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
472
473 if (expect_false (!mg))
474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
475
476 av = (AV *)mg->mg_obj;
477
478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
479 av_extend (av, AvMAX (av) + 1);
480
481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
482}
483
484/** load & save, init *******************************************************/
485
486static void
487load_perl (pTHX_ Coro__State c)
488{
489 perl_slots *slot = c->slot;
490 c->slot = 0;
491
492 PL_mainstack = c->mainstack;
493
494 GvSV (PL_defgv) = slot->defsv;
495 GvAV (PL_defgv) = slot->defav;
496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
502
503 {
504 dSP;
505
506 CV *cv;
507
508 /* now do the ugly restore mess */
509 while (expect_true (cv = (CV *)POPs))
510 {
511 put_padlist (aTHX_ cv); /* mark this padlist as available */
512 CvDEPTH (cv) = PTR2IV (POPs);
513 CvPADLIST (cv) = (AV *)POPs;
514 }
515
516 PUTBACK;
517 }
518
519 slf_frame = c->slf_frame;
520}
521
522static void
523save_perl (pTHX_ Coro__State c)
524{
525 c->slf_frame = slf_frame;
526
527 {
528 dSP;
529 I32 cxix = cxstack_ix;
530 PERL_CONTEXT *ccstk = cxstack;
531 PERL_SI *top_si = PL_curstackinfo;
532
533 /*
534 * the worst thing you can imagine happens first - we have to save
535 * (and reinitialize) all cv's in the whole callchain :(
536 */
537
538 XPUSHs (Nullsv);
539 /* this loop was inspired by pp_caller */
540 for (;;)
541 {
542 while (expect_true (cxix >= 0))
543 {
544 PERL_CONTEXT *cx = &ccstk[cxix--];
545
546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
547 {
548 CV *cv = cx->blk_sub.cv;
549
550 if (expect_true (CvDEPTH (cv)))
551 {
552 EXTEND (SP, 3);
553 PUSHs ((SV *)CvPADLIST (cv));
554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
555 PUSHs ((SV *)cv);
556
557 CvDEPTH (cv) = 0;
558 get_padlist (aTHX_ cv);
559 }
560 }
561 }
562
563 if (expect_true (top_si->si_type == PERLSI_MAIN))
564 break;
565
566 top_si = top_si->si_prev;
567 ccstk = top_si->si_cxstack;
568 cxix = top_si->si_cxix;
569 }
570
571 PUTBACK;
572 }
573
574 /* allocate some space on the context stack for our purposes */
575 /* we manually unroll here, as usually 2 slots is enough */
576 if (SLOT_COUNT >= 1) CXINC;
577 if (SLOT_COUNT >= 2) CXINC;
578 if (SLOT_COUNT >= 3) CXINC;
579 {
580 int i;
581 for (i = 3; i < SLOT_COUNT; ++i)
582 CXINC;
583 }
584 cxstack_ix -= SLOT_COUNT; /* undo allocation */
585
586 c->mainstack = PL_mainstack;
587
588 {
589 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
590
591 slot->defav = GvAV (PL_defgv);
592 slot->defsv = DEFSV;
593 slot->errsv = ERRSV;
594 slot->irsgv = GvSV (irsgv);
595
596 #define VAR(name,type) slot->name = PL_ ## name;
597 # include "state.h"
598 #undef VAR
599 }
600}
601
602/*
603 * allocate various perl stacks. This is almost an exact copy
604 * of perl.c:init_stacks, except that it uses less memory
605 * on the (sometimes correct) assumption that coroutines do
606 * not usually need a lot of stackspace.
607 */
608#if CORO_PREFER_PERL_FUNCTIONS
609# define coro_init_stacks init_stacks
610#else
611static void
612coro_init_stacks (pTHX)
613{
614 PL_curstackinfo = new_stackinfo(32, 8);
615 PL_curstackinfo->si_type = PERLSI_MAIN;
616 PL_curstack = PL_curstackinfo->si_stack;
617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
618
619 PL_stack_base = AvARRAY(PL_curstack);
620 PL_stack_sp = PL_stack_base;
621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
622
623 New(50,PL_tmps_stack,32,SV*);
624 PL_tmps_floor = -1;
625 PL_tmps_ix = -1;
626 PL_tmps_max = 32;
627
628 New(54,PL_markstack,16,I32);
629 PL_markstack_ptr = PL_markstack;
630 PL_markstack_max = PL_markstack + 16;
631
632#ifdef SET_MARK_OFFSET
633 SET_MARK_OFFSET;
634#endif
635
636 New(54,PL_scopestack,8,I32);
637 PL_scopestack_ix = 0;
638 PL_scopestack_max = 8;
639
640 New(54,PL_savestack,24,ANY);
641 PL_savestack_ix = 0;
642 PL_savestack_max = 24;
643
644#if !PERL_VERSION_ATLEAST (5,10,0)
645 New(54,PL_retstack,4,OP*);
646 PL_retstack_ix = 0;
647 PL_retstack_max = 4;
648#endif
649}
650#endif
651
652/*
653 * destroy the stacks, the callchain etc...
654 */
655static void
656coro_destruct_stacks (pTHX)
657{
658 while (PL_curstackinfo->si_next)
659 PL_curstackinfo = PL_curstackinfo->si_next;
660
661 while (PL_curstackinfo)
662 {
663 PERL_SI *p = PL_curstackinfo->si_prev;
664
665 if (!IN_DESTRUCT)
666 SvREFCNT_dec (PL_curstackinfo->si_stack);
667
668 Safefree (PL_curstackinfo->si_cxstack);
669 Safefree (PL_curstackinfo);
670 PL_curstackinfo = p;
671 }
672
673 Safefree (PL_tmps_stack);
674 Safefree (PL_markstack);
675 Safefree (PL_scopestack);
676 Safefree (PL_savestack);
677#if !PERL_VERSION_ATLEAST (5,10,0)
678 Safefree (PL_retstack);
679#endif
680}
681
682static size_t
683coro_rss (pTHX_ struct coro *coro)
684{
685 size_t rss = sizeof (*coro);
686
687 if (coro->mainstack)
688 {
689 perl_slots tmp_slot;
690 perl_slots *slot;
691
692 if (coro->flags & CF_RUNNING)
693 {
694 slot = &tmp_slot;
695
696 #define VAR(name,type) slot->name = PL_ ## name;
697 # include "state.h"
698 #undef VAR
699 }
700 else
701 slot = coro->slot;
702
703 if (slot)
704 {
705 rss += sizeof (slot->curstackinfo);
706 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
708 rss += slot->tmps_max * sizeof (SV *);
709 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
710 rss += slot->scopestack_max * sizeof (I32);
711 rss += slot->savestack_max * sizeof (ANY);
712
713#if !PERL_VERSION_ATLEAST (5,10,0)
714 rss += slot->retstack_max * sizeof (OP *);
715#endif
716 }
717 }
718
719 return rss;
720}
721
722/** coroutine stack handling ************************************************/
723
724static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
727
728/* apparently < 5.8.8 */
729#ifndef MgPV_nolen_const
730#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
731 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
732 (const char*)(mg)->mg_ptr)
733#endif
734
735/*
736 * This overrides the default magic get method of %SIG elements.
737 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
738 * and instead of tryign to save and restore the hash elements, we just provide
739 * readback here.
740 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
741 * not expecting this to actually change the hook. This is a potential problem
742 * when a schedule happens then, but we ignore this.
743 */
865static void 744static int
866api_schedule (void) 745coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
867{ 746{
747 const char *s = MgPV_nolen_const (mg);
748
749 if (*s == '_')
750 {
751 SV **svp = 0;
752
753 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
754 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
755
756 if (svp)
757 {
758 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
759 return 0;
760 }
761 }
762
763 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
764}
765
766static int
767coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 SV *old = *svp;
781 *svp = 0;
782 SvREFCNT_dec (old);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = newSVsv (sv);
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
812}
813
814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
828coro_setup (pTHX_ struct coro *coro)
829{
830 /*
831 * emulate part of the perl startup here.
832 */
833 coro_init_stacks (aTHX);
834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880}
881
882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
903 SvREFCNT_dec (GvAV (PL_defgv));
904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
914
915 coro_destruct_stacks (aTHX);
916}
917
918INLINE void
919free_coro_mortal (pTHX)
920{
921 if (expect_true (coro_mortal))
922 {
923 SvREFCNT_dec (coro_mortal);
924 coro_mortal = 0;
925 }
926}
927
928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 {
938 PERL_ASYNC_CHECK ();
939
940 if (cctx->flags & CC_TRACE_ALL)
941 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top;
946 AV *av = newAV (); /* return values */
947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
986 {
987 SV **cb;
988
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
990 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 {
995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
1021 }
1022
1023 if (cctx->flags & CC_TRACE_LINE)
1024 {
1025 dSP;
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PL_runops = RUNOPS_DEFAULT;
1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043 }
1044 }
1045 }
1046 }
1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
1063static void NOINLINE
1064cctx_prepare (pTHX_ coro_cctx *cctx)
1065{
1066 dSP;
1067 UNOP myop;
1068
1069 PL_top_env = &PL_start_env;
1070
1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
1073
1074 Zero (&myop, 1, UNOP);
1075 myop.op_next = PL_op;
1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1077
1078 PUSHMARK (SP);
1079 EXTEND (SP, 2);
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1082 PUTBACK;
1083 PL_op = (OP *)&myop;
1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1085 SPAGAIN;
1086}
1087
1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
1090transfer_tail (pTHX)
1091{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX);
1097
1098 if (expect_false (next->throw))
1099 {
1100 SV *exception = sv_2mortal (next->throw);
1101
1102 next->throw = 0;
1103 sv_setsv (ERRSV, exception);
1104 croak (0);
1105 }
1106}
1107
1108/*
1109 * this is a _very_ stripped down perl interpreter ;)
1110 */
1111static void
1112cctx_run (void *arg)
1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
1120 dTHX;
1121
1122 /* normally we would need to skip the entersub here */
1123 /* not doing so will re-execute it, which is exactly what we want */
1124 /* PL_nop = PL_nop->op_next */
1125
1126 /* inject a fake subroutine call to cctx_init */
1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
1128
1129 /* cctx_run is the alternative tail of transfer() */
1130 /* TODO: throwing an exception here might be deadly, VERIFY */
1131 transfer_tail (aTHX);
1132
1133 /* somebody or something will hit me for both perl_run and PL_restartop */
1134 PL_restartop = PL_op;
1135 perl_run (PL_curinterp);
1136
1137 /*
1138 * If perl-run returns we assume exit() was being called or the coro
1139 * fell off the end, which seems to be the only valid (non-bug)
1140 * reason for perl_run to return. We try to exit by jumping to the
1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1142 * coroutine as Coro has no such concept
1143 */
1144 PL_top_env = main_top_env;
1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
1147}
1148
1149static coro_cctx *
1150cctx_new ()
1151{
1152 coro_cctx *cctx;
1153
1154 ++cctx_count;
1155 New (0, cctx, 1, coro_cctx);
1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1181 void *stack_start;
1182 size_t stack_size;
1183
1184#if HAVE_MMAP
1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1186 /* mmap supposedly does allocate-on-write for us */
1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1188
1189 if (cctx->sptr != (void *)-1)
1190 {
1191 #if CORO_STACKGUARD
1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1193 #endif
1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1196 cctx->flags |= CC_MAPPED;
1197 }
1198 else
1199#endif
1200 {
1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1202 New (0, cctx->sptr, cctx_stacksize, long);
1203
1204 if (!cctx->sptr)
1205 {
1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1207 _exit (EXIT_FAILURE);
1208 }
1209
1210 stack_start = cctx->sptr;
1211 stack_size = cctx->ssize;
1212 }
1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1216 #endif
1217
1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1219
1220 return cctx;
1221}
1222
1223static void
1224cctx_destroy (coro_cctx *cctx)
1225{
1226 if (!cctx)
1227 return;
1228
1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
1231
1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1237 #endif
1238
1239#if HAVE_MMAP
1240 if (cctx->flags & CC_MAPPED)
1241 munmap (cctx->sptr, cctx->ssize);
1242 else
1243#endif
1244 Safefree (cctx->sptr);
1245 }
1246
1247 Safefree (cctx);
1248}
1249
1250/* wether this cctx should be destructed */
1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1252
1253static coro_cctx *
1254cctx_get (pTHX)
1255{
1256 while (expect_true (cctx_first))
1257 {
1258 coro_cctx *cctx = cctx_first;
1259 cctx_first = cctx->next;
1260 --cctx_idle;
1261
1262 if (expect_true (!CCTX_EXPIRED (cctx)))
1263 return cctx;
1264
1265 cctx_destroy (cctx);
1266 }
1267
1268 return cctx_new_run ();
1269}
1270
1271static void
1272cctx_put (coro_cctx *cctx)
1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
1276 /* free another cctx if overlimit */
1277 if (expect_false (cctx_idle >= cctx_max_idle))
1278 {
1279 coro_cctx *first = cctx_first;
1280 cctx_first = first->next;
1281 --cctx_idle;
1282
1283 cctx_destroy (first);
1284 }
1285
1286 ++cctx_idle;
1287 cctx->next = cctx_first;
1288 cctx_first = cctx;
1289}
1290
1291/** coroutine switching *****************************************************/
1292
1293static void
1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1295{
1296 if (expect_true (prev != next))
1297 {
1298 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1300
1301 if (expect_false (next->flags & CF_RUNNING))
1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1303
1304 if (expect_false (next->flags & CF_DESTROYED))
1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1306
1307#if !PERL_VERSION_ATLEAST (5,10,0)
1308 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1310#endif
1311 }
1312}
1313
1314/* always use the TRANSFER macro */
1315static void NOINLINE
1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1317{
1318 dSTACKLEVEL;
1319
1320 /* sometimes transfer is only called to set idle_sp */
1321 if (expect_false (!next))
1322 {
1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1325 }
1326 else if (expect_true (prev != next))
1327 {
1328 coro_cctx *prev__cctx;
1329
1330 if (expect_false (prev->flags & CF_NEW))
1331 {
1332 /* create a new empty/source context */
1333 prev->cctx = cctx_new_empty ();
1334 prev->flags &= ~CF_NEW;
1335 prev->flags |= CF_RUNNING;
1336 }
1337
1338 prev->flags &= ~CF_RUNNING;
1339 next->flags |= CF_RUNNING;
1340
1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
1343
1344 if (expect_false (next->flags & CF_NEW))
1345 {
1346 /* need to start coroutine */
1347 next->flags &= ~CF_NEW;
1348 /* setup coroutine call */
1349 coro_setup (aTHX_ next);
1350 }
1351 else
1352 load_perl (aTHX_ next);
1353
1354 prev__cctx = prev->cctx;
1355
1356 /* possibly untie and reuse the cctx */
1357 if (expect_true (
1358 prev__cctx->idle_sp == (void *)stacklevel
1359 && !(prev__cctx->flags & CC_TRACE)
1360 && !force_cctx
1361 ))
1362 {
1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1365
1366 prev->cctx = 0;
1367
1368 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1370 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1371 if (!next->cctx)
1372 next->cctx = cctx_get (aTHX);
1373
1374 cctx_put (prev__cctx);
1375 }
1376
1377 ++next->usecount;
1378
1379 if (expect_true (!next->cctx))
1380 next->cctx = cctx_get (aTHX);
1381
1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1384
1385 if (expect_false (prev__cctx != next->cctx))
1386 {
1387 prev__cctx->top_env = PL_top_env;
1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1390 }
1391
1392 transfer_tail (aTHX);
1393 }
1394}
1395
1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1398
1399/** high level stuff ********************************************************/
1400
1401static int
1402coro_state_destroy (pTHX_ struct coro *coro)
1403{
1404 if (coro->flags & CF_DESTROYED)
1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1420
1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1422 {
1423 struct coro temp;
1424
1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
1429
1430 coro_destruct (aTHX_ coro);
1431
1432 load_perl (aTHX_ &temp);
1433
1434 coro->slot = 0;
1435 }
1436
1437 cctx_destroy (coro->cctx);
1438 SvREFCNT_dec (coro->args);
1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
1445}
1446
1447static int
1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1449{
1450 struct coro *coro = (struct coro *)mg->mg_ptr;
1451 mg->mg_ptr = 0;
1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
1460
1461 return 0;
1462}
1463
1464static int
1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1466{
1467 struct coro *coro = (struct coro *)mg->mg_ptr;
1468
1469 ++coro->refcnt;
1470
1471 return 0;
1472}
1473
1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
1484
1485static void
1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1487{
1488 ta->prev = SvSTATE (prev_sv);
1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1491}
1492
1493static void
1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1495{
1496 struct coro_transfer_args ta;
1497
1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1499 TRANSFER (ta, 1);
1500}
1501
1502/** Coro ********************************************************************/
1503
1504INLINE void
1505coro_enq (pTHX_ struct coro *coro)
1506{
1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1508}
1509
1510INLINE SV *
1511coro_deq (pTHX)
1512{
1513 int prio;
1514
1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
1518
1519 return 0;
1520}
1521
1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_DISCARD);
1555 SPAGAIN;
1556
1557 FREETMPS;
1558 LEAVE;
1559 }
1560
1561 if (xs_hook)
1562 xs_hook ();
1563
1564 return 1;
1565}
1566
1567static int
1568api_is_ready (pTHX_ SV *coro_sv)
1569{
1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1571}
1572
1573INLINE void
1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1575{
868 SV *prev, *next; 1576 SV *prev_sv, *next_sv;
869 1577
870 prev = SvRV (GvSV (coro_current)); 1578 for (;;)
871 next = coro_deq (PRIO_MIN); 1579 {
1580 next_sv = coro_deq (aTHX);
872 1581
873 if (!next) 1582 /* nothing to schedule: call the idle handler */
874 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586
1587 ENTER;
1588 SAVETMPS;
1589
1590 PUSHMARK (SP);
1591 PUTBACK;
1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1594
1595 FREETMPS;
1596 LEAVE;
1597 continue;
1598 }
1599
1600 ta->next = SvSTATE_hv (next_sv);
1601
1602 /* cannot transfer to destroyed coros, skip and look for next */
1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1604 {
1605 SvREFCNT_dec (next_sv);
1606 /* coro_nready has already been taken care of by destroy */
1607 continue;
1608 }
1609
1610 --coro_nready;
1611 break;
1612 }
875 1613
876 /* free this only after the transfer */ 1614 /* free this only after the transfer */
1615 prev_sv = SvRV (coro_current);
1616 ta->prev = SvSTATE_hv (prev_sv);
1617 TRANSFER_CHECK (*ta);
1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1619 ta->next->flags &= ~CF_READY;
1620 SvRV_set (coro_current, next_sv);
1621
1622 free_coro_mortal (aTHX);
877 coro_mortal = prev; 1623 coro_mortal = prev_sv;
878 SV_CORO (prev, "Coro::schedule");
879
880 SvRV (GvSV (coro_current)) = next;
881
882 SV_CORO (next, "Coro::schedule");
883
884 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
885 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
886} 1624}
887 1625
888static void 1626INLINE void
889api_cede (void) 1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
890{ 1628{
891 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1629 api_ready (aTHX_ coro_current);
1630 prepare_schedule (aTHX_ ta);
1631}
892 1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
893 api_schedule (); 1648api_schedule (pTHX)
894} 1649{
1650 struct coro_transfer_args ta;
895 1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int
1657api_cede (pTHX)
1658{
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
1666 return 1;
1667 }
1668 else
1669 return 0;
1670}
1671
1672static int
1673api_cede_notself (pTHX)
1674{
1675 if (coro_nready)
1676 {
1677 struct coro_transfer_args ta;
1678
1679 prepare_cede_notself (aTHX_ &ta);
1680 TRANSFER (ta, 1);
1681 return 1;
1682 }
1683 else
1684 return 0;
1685}
1686
1687static void
1688api_trace (pTHX_ SV *coro_sv, int flags)
1689{
1690 struct coro *coro = SvSTATE (coro_sv);
1691
1692 if (flags & CC_TRACE)
1693 {
1694 if (!coro->cctx)
1695 coro->cctx = cctx_new_run ();
1696 else if (!(coro->cctx->flags & CC_TRACE))
1697 croak ("cannot enable tracing on coroutine with custom stack,");
1698
1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1700 }
1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1702 {
1703 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1704
1705 if (coro->flags & CF_RUNNING)
1706 PL_runops = RUNOPS_DEFAULT;
1707 else
1708 coro->slot->runops = RUNOPS_DEFAULT;
1709 }
1710}
1711
1712/*****************************************************************************/
1713/* PerlIO::cede */
1714
1715typedef struct
1716{
1717 PerlIOBuf base;
1718 NV next, every;
1719} PerlIOCede;
1720
1721static IV
1722PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1723{
1724 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1725
1726 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1727 self->next = nvtime () + self->every;
1728
1729 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1730}
1731
1732static SV *
1733PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736
1737 return newSVnv (self->every);
1738}
1739
1740static IV
1741PerlIOCede_flush (pTHX_ PerlIO *f)
1742{
1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1744 double now = nvtime ();
1745
1746 if (now >= self->next)
1747 {
1748 api_cede (aTHX);
1749 self->next = now + self->every;
1750 }
1751
1752 return PerlIOBuf_flush (aTHX_ f);
1753}
1754
1755static PerlIO_funcs PerlIO_cede =
1756{
1757 sizeof(PerlIO_funcs),
1758 "cede",
1759 sizeof(PerlIOCede),
1760 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1761 PerlIOCede_pushed,
1762 PerlIOBuf_popped,
1763 PerlIOBuf_open,
1764 PerlIOBase_binmode,
1765 PerlIOCede_getarg,
1766 PerlIOBase_fileno,
1767 PerlIOBuf_dup,
1768 PerlIOBuf_read,
1769 PerlIOBuf_unread,
1770 PerlIOBuf_write,
1771 PerlIOBuf_seek,
1772 PerlIOBuf_tell,
1773 PerlIOBuf_close,
1774 PerlIOCede_flush,
1775 PerlIOBuf_fill,
1776 PerlIOBase_eof,
1777 PerlIOBase_error,
1778 PerlIOBase_clearerr,
1779 PerlIOBase_setlinebuf,
1780 PerlIOBuf_get_base,
1781 PerlIOBuf_bufsiz,
1782 PerlIOBuf_get_ptr,
1783 PerlIOBuf_get_cnt,
1784 PerlIOBuf_set_ptrcnt,
1785};
1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
1943 {
1944 if (sp == bot)
1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
1948 }
1949
1950 PUTBACK;
1951 }
1952
1953 return NORMAL;
1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, int adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as possible */
2001 while (count > 0 && AvFILLp (av) >= count)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
2028static int
2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2030{
2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
2033
2034 if (SvIVX (count_sv) > 0)
2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2038 return 0;
2039 }
2040 else
2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
2046
2047 for (i = 1; i <= AvFILLp (av); ++i)
2048 if (AvARRAY (av)[i] == SvRV (coro_current))
2049 return 1;
2050
2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2052 return 1;
2053 }
2054}
2055
2056static void
2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 AV *av = (AV *)SvRV (arg [0]);
2060
2061 if (SvIVX (AvARRAY (av)[0]) > 0)
2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 }
2066 else
2067 {
2068 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2069
2070 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2071 frame->prepare = prepare_schedule;
2072
2073 /* to avoid race conditions when a woken-up coro gets terminated */
2074 /* we arrange for a temporary on_destroy that calls adjust (0) */
2075 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2076 }
2077
2078 frame->check = slf_check_semaphore_down;
2079
2080}
2081
2082/*****************************************************************************/
2083
2084#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2085
2086/* create a closure from XS, returns a code reference */
2087/* the arg can be accessed via GENSUB_ARG from the callback */
2088/* the callback must use dXSARGS/XSRETURN */
2089static SV *
2090gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2091{
2092 CV *cv = (CV *)NEWSV (0, 0);
2093
2094 sv_upgrade ((SV *)cv, SVt_PVCV);
2095
2096 CvANON_on (cv);
2097 CvISXSUB_on (cv);
2098 CvXSUB (cv) = xsub;
2099 GENSUB_ARG = arg;
2100
2101 return newRV_noinc ((SV *)cv);
2102}
2103
2104/*****************************************************************************/
2105
896MODULE = Coro::State PACKAGE = Coro::State 2106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
897 2107
898PROTOTYPES: ENABLE 2108PROTOTYPES: DISABLE
899 2109
900BOOT: 2110BOOT:
901{ /* {} necessary for stoopid perl-5.6.x */ 2111{
902 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2112#ifdef USE_ITHREADS
903 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2113# if CORO_PTHREAD
2114 coro_thx = PERL_GET_CONTEXT;
2115# endif
2116#endif
2117 BOOT_PAGESIZE;
2118
2119 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2120 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2121
2122 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2123 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2124 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2125
2126 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2127 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2128 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2129
904 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2130 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
905 2131
906 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2132 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
907 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2133 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
908 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
909 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2135 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
910
911 if (!padlist_cache)
912 padlist_cache = newHV ();
913 2136
914 main_mainstack = PL_mainstack; 2137 main_mainstack = PL_mainstack;
2138 main_top_env = PL_top_env;
915 2139
2140 while (main_top_env->je_prev)
2141 main_top_env = main_top_env->je_prev;
2142
2143 {
2144 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2145
2146 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2147 hv_store_ent (PL_custom_op_names, slf,
2148 newSVpv ("coro_slf", 0), 0);
2149
2150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2151 hv_store_ent (PL_custom_op_descs, slf,
2152 newSVpv ("coro schedule like function", 0), 0);
2153 }
2154
916 coroapi.ver = CORO_API_VERSION; 2155 coroapi.ver = CORO_API_VERSION;
2156 coroapi.rev = CORO_API_REVISION;
2157
917 coroapi.transfer = api_transfer; 2158 coroapi.transfer = api_transfer;
918}
919 2159
920Coro::State 2160 coroapi.sv_state = SvSTATE_;
921_newprocess(args) 2161 coroapi.execute_slf = api_execute_slf;
922 SV * args 2162 coroapi.prepare_nop = prepare_nop;
923 PROTOTYPE: $ 2163 coroapi.prepare_schedule = prepare_schedule;
2164 coroapi.prepare_cede = prepare_cede;
2165 coroapi.prepare_cede_notself = prepare_cede_notself;
2166
2167 {
2168 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2169
2170 if (!svp) croak ("Time::HiRes is required");
2171 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2172
2173 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2174 }
2175
2176 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2177}
2178
2179SV *
2180new (char *klass, ...)
924 CODE: 2181 CODE:
925 Coro__State coro; 2182{
2183 struct coro *coro;
2184 MAGIC *mg;
2185 HV *hv;
2186 int i;
926 2187
927 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
928 croak ("Coro::State::_newprocess expects an arrayref");
929
930 New (0, coro, 1, struct coro); 2188 Newz (0, coro, 1, struct coro);
2189 coro->args = newAV ();
2190 coro->flags = CF_NEW;
931 2191
932 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2192 if (coro_first) coro_first->prev = coro;
933 coro->mainstack = 0; /* actual work is done inside transfer */ 2193 coro->next = coro_first;
934 coro->stack = 0; 2194 coro_first = coro;
935 2195
936 /* same as JMPENV_BOOTSTRAP */ 2196 coro->hv = hv = newHV ();
937 /* we might be able to recycle start_env, but safe is safe */ 2197 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
938 Zero(&coro->start_env, 1, JMPENV); 2198 mg->mg_flags |= MGf_DUP;
939 coro->start_env.je_ret = -1; 2199 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
940 coro->start_env.je_mustcatch = TRUE;
941 2200
942 RETVAL = coro; 2201 av_extend (coro->args, items - 1);
2202 for (i = 1; i < items; i++)
2203 av_push (coro->args, newSVsv (ST (i)));
2204}
943 OUTPUT: 2205 OUTPUT:
944 RETVAL 2206 RETVAL
945 2207
946void 2208void
947transfer(prev, next, flags) 2209_set_stacklevel (...)
948 SV *prev 2210 CODE:
949 SV *next 2211 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
950 int flags
951 PROTOTYPE: @
952 CODE:
953 PUTBACK;
954 SV_CORO (next, "Coro::transfer");
955 SV_CORO (prev, "Coro::transfer");
956 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
957 SPAGAIN;
958 2212
959void 2213void
960DESTROY(coro) 2214transfer (...)
961 Coro::State coro 2215 PROTOTYPE: $$
962 CODE: 2216 CODE:
2217 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
963 2218
964 if (coro->mainstack && coro->mainstack != main_mainstack) 2219bool
2220_destroy (SV *coro_sv)
2221 CODE:
2222 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2223 OUTPUT:
2224 RETVAL
2225
2226void
2227_exit (int code)
2228 PROTOTYPE: $
2229 CODE:
2230 _exit (code);
2231
2232int
2233cctx_stacksize (int new_stacksize = 0)
2234 PROTOTYPE: ;$
2235 CODE:
2236 RETVAL = cctx_stacksize;
2237 if (new_stacksize)
2238 {
2239 cctx_stacksize = new_stacksize;
2240 ++cctx_gen;
2241 }
2242 OUTPUT:
2243 RETVAL
2244
2245int
2246cctx_max_idle (int max_idle = 0)
2247 PROTOTYPE: ;$
2248 CODE:
2249 RETVAL = cctx_max_idle;
2250 if (max_idle > 1)
2251 cctx_max_idle = max_idle;
2252 OUTPUT:
2253 RETVAL
2254
2255int
2256cctx_count ()
2257 PROTOTYPE:
2258 CODE:
2259 RETVAL = cctx_count;
2260 OUTPUT:
2261 RETVAL
2262
2263int
2264cctx_idle ()
2265 PROTOTYPE:
2266 CODE:
2267 RETVAL = cctx_idle;
2268 OUTPUT:
2269 RETVAL
2270
2271void
2272list ()
2273 PROTOTYPE:
2274 PPCODE:
2275{
2276 struct coro *coro;
2277 for (coro = coro_first; coro; coro = coro->next)
2278 if (coro->hv)
2279 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2280}
2281
2282void
2283call (Coro::State coro, SV *coderef)
2284 ALIAS:
2285 eval = 1
2286 CODE:
2287{
2288 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
965 { 2289 {
966 struct coro temp; 2290 struct coro temp;
967 2291
2292 if (!(coro->flags & CF_RUNNING))
2293 {
2294 PUTBACK;
2295 save_perl (aTHX_ &temp);
2296 load_perl (aTHX_ coro);
2297 }
2298
2299 {
2300 dSP;
2301 ENTER;
2302 SAVETMPS;
968 PUTBACK; 2303 PUTBACK;
969 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2304 PUSHSTACK;
970 LOAD(aTHX_ coro); 2305 PUSHMARK (SP);
2306
2307 if (ix)
2308 eval_sv (coderef, 0);
2309 else
2310 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2311
2312 POPSTACK;
971 SPAGAIN; 2313 SPAGAIN;
2314 FREETMPS;
2315 LEAVE;
2316 PUTBACK;
2317 }
972 2318
973 destroy_stacks (aTHX); 2319 if (!(coro->flags & CF_RUNNING))
974 2320 {
975 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2321 save_perl (aTHX_ coro);
2322 load_perl (aTHX_ &temp);
976 SPAGAIN; 2323 SPAGAIN;
977 2324 }
978 coro->mainstack = 0;
979 } 2325 }
2326}
980 2327
981 deallocate_stack (coro); 2328SV *
982 2329is_ready (Coro::State coro)
983 Safefree (coro); 2330 PROTOTYPE: $
2331 ALIAS:
2332 is_ready = CF_READY
2333 is_running = CF_RUNNING
2334 is_new = CF_NEW
2335 is_destroyed = CF_DESTROYED
2336 CODE:
2337 RETVAL = boolSV (coro->flags & ix);
2338 OUTPUT:
2339 RETVAL
984 2340
985void 2341void
986flush() 2342throw (Coro::State self, SV *throw = &PL_sv_undef)
987 CODE: 2343 PROTOTYPE: $;$
988#ifdef MAY_FLUSH 2344 CODE:
989 flush_padlist_cache (); 2345 SvREFCNT_dec (self->throw);
990#endif 2346 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
991 2347
992void 2348void
993_exit(code) 2349api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
994 int code 2350 PROTOTYPE: $;$
2351 C_ARGS: aTHX_ coro, flags
2352
2353SV *
2354has_cctx (Coro::State coro)
995 PROTOTYPE: $ 2355 PROTOTYPE: $
996 CODE: 2356 CODE:
997#if defined(__GLIBC__) || _POSIX_C_SOURCE 2357 RETVAL = boolSV (!!coro->cctx);
998 _exit (code); 2358 OUTPUT:
999#else 2359 RETVAL
1000 signal (SIGTERM, SIG_DFL);
1001 raise (SIGTERM);
1002 exit (code);
1003#endif
1004 2360
1005MODULE = Coro::State PACKAGE = Coro::Cont 2361int
2362is_traced (Coro::State coro)
2363 PROTOTYPE: $
2364 CODE:
2365 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2366 OUTPUT:
2367 RETVAL
1006 2368
1007# this is slightly dirty (should expose a c-level api) 2369UV
2370rss (Coro::State coro)
2371 PROTOTYPE: $
2372 ALIAS:
2373 usecount = 1
2374 CODE:
2375 switch (ix)
2376 {
2377 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2378 case 1: RETVAL = coro->usecount; break;
2379 }
2380 OUTPUT:
2381 RETVAL
1008 2382
1009void 2383void
1010yield(...) 2384force_cctx ()
2385 PROTOTYPE:
2386 CODE:
2387 SvSTATE_current->cctx->idle_sp = 0;
2388
2389void
2390swap_defsv (Coro::State self)
1011 PROTOTYPE: @ 2391 PROTOTYPE: $
2392 ALIAS:
2393 swap_defav = 1
1012 CODE: 2394 CODE:
1013 static SV *returnstk; 2395 if (!self->slot)
1014 SV *sv; 2396 croak ("cannot swap state with coroutine that has no saved state,");
1015 AV *defav = GvAV (PL_defgv); 2397 else
1016 struct coro *prev, *next; 2398 {
2399 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2400 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1017 2401
1018 if (!returnstk) 2402 SV *tmp = *src; *src = *dst; *dst = tmp;
1019 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2403 }
1020
1021 /* set up @_ -- ugly */
1022 av_clear (defav);
1023 av_fill (defav, items - 1);
1024 while (items--)
1025 av_store (defav, items, SvREFCNT_inc (ST(items)));
1026
1027 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1028 sv = av_pop ((AV *)SvRV (returnstk));
1029 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1030 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1031 SvREFCNT_dec (sv);
1032
1033 transfer(aTHX_ prev, next, 0);
1034 2404
1035MODULE = Coro::State PACKAGE = Coro 2405MODULE = Coro::State PACKAGE = Coro
1036 2406
1037# this is slightly dirty (should expose a c-level api)
1038
1039BOOT: 2407BOOT:
1040{ 2408{
1041 int i; 2409 int i;
2410
2411 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2412 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2413 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2414
2415 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2416 SvREADONLY_on (coro_current);
2417
1042 HV *stash = gv_stashpv ("Coro", TRUE); 2418 coro_stash = gv_stashpv ("Coro", TRUE);
1043 2419
1044 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2420 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2421 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2422 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2423 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2424 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2425 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053 2426
1054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2427 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055 coro_ready[i] = newAV (); 2428 coro_ready[i] = newAV ();
1056 2429
1057 { 2430 {
1058 SV *sv = perl_get_sv("Coro::API", 1); 2431 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1059 2432
1060 coroapi.schedule = api_schedule; 2433 coroapi.schedule = api_schedule;
1061 coroapi.cede = api_cede; 2434 coroapi.cede = api_cede;
2435 coroapi.cede_notself = api_cede_notself;
1062 coroapi.ready = api_ready; 2436 coroapi.ready = api_ready;
2437 coroapi.is_ready = api_is_ready;
1063 coroapi.nready = &coro_nready; 2438 coroapi.nready = coro_nready;
1064 coroapi.current = coro_current; 2439 coroapi.current = coro_current;
1065 2440
1066 GCoroAPI = &coroapi; 2441 GCoroAPI = &coroapi;
1067 sv_setiv(sv, (IV)&coroapi); 2442 sv_setiv (sv, (IV)&coroapi);
1068 SvREADONLY_on(sv); 2443 SvREADONLY_on (sv);
1069 } 2444 }
1070} 2445}
1071 2446
1072void 2447void
1073ready(self) 2448schedule (...)
1074 SV * self 2449 CODE:
2450 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2451
2452void
2453cede (...)
2454 CODE:
2455 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2456
2457void
2458cede_notself (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2461
2462void
2463_set_current (SV *current)
1075 PROTOTYPE: $ 2464 PROTOTYPE: $
1076 CODE: 2465 CODE:
1077 api_ready (self); 2466 SvREFCNT_dec (SvRV (coro_current));
2467 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2468
2469void
2470_set_readyhook (SV *hook)
2471 PROTOTYPE: $
2472 CODE:
2473 SvREFCNT_dec (coro_readyhook);
2474 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1078 2475
1079int 2476int
2477prio (Coro::State coro, int newprio = 0)
2478 PROTOTYPE: $;$
2479 ALIAS:
2480 nice = 1
2481 CODE:
2482{
2483 RETVAL = coro->prio;
2484
2485 if (items > 1)
2486 {
2487 if (ix)
2488 newprio = coro->prio - newprio;
2489
2490 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2491 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2492
2493 coro->prio = newprio;
2494 }
2495}
2496 OUTPUT:
2497 RETVAL
2498
2499SV *
2500ready (SV *self)
2501 PROTOTYPE: $
2502 CODE:
2503 RETVAL = boolSV (api_ready (aTHX_ self));
2504 OUTPUT:
2505 RETVAL
2506
2507int
1080nready(...) 2508nready (...)
1081 PROTOTYPE: 2509 PROTOTYPE:
1082 CODE: 2510 CODE:
1083 RETVAL = coro_nready; 2511 RETVAL = coro_nready;
1084 OUTPUT: 2512 OUTPUT:
1085 RETVAL 2513 RETVAL
1086 2514
2515# for async_pool speedup
1087void 2516void
1088schedule(...) 2517_pool_1 (SV *cb)
1089 PROTOTYPE:
1090 CODE: 2518 CODE:
1091 api_schedule (); 2519{
2520 HV *hv = (HV *)SvRV (coro_current);
2521 struct coro *coro = SvSTATE_hv ((SV *)hv);
2522 AV *defav = GvAV (PL_defgv);
2523 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2524 AV *invoke_av;
2525 int i, len;
2526
2527 if (!invoke)
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 SvREFCNT_dec (coro->saved_deffh);
2536 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2537
2538 hv_store (hv, "desc", sizeof ("desc") - 1,
2539 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2540
2541 invoke_av = (AV *)SvRV (invoke);
2542 len = av_len (invoke_av);
2543
2544 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2545
2546 if (len > 0)
2547 {
2548 av_fill (defav, len - 1);
2549 for (i = 0; i < len; ++i)
2550 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2551 }
2552}
1092 2553
1093void 2554void
1094cede(...) 2555_pool_2 (SV *cb)
1095 PROTOTYPE:
1096 CODE: 2556 CODE:
2557{
2558 struct coro *coro = SvSTATE_current;
2559
2560 sv_setsv (cb, &PL_sv_undef);
2561
2562 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2563 coro->saved_deffh = 0;
2564
2565 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2566 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2567 {
2568 SV *old = PL_diehook;
2569 PL_diehook = 0;
2570 SvREFCNT_dec (old);
2571 croak ("\3async_pool terminate\2\n");
2572 }
2573
2574 av_clear (GvAV (PL_defgv));
2575 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2576 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2577
2578 coro->prio = 0;
2579
2580 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2581 api_trace (aTHX_ coro_current, 0);
2582
2583 av_push (av_async_pool, newSVsv (coro_current));
2584}
2585
2586
2587MODULE = Coro::State PACKAGE = Coro::AIO
2588
2589void
2590_get_state (SV *self)
2591 PROTOTYPE: $
2592 PPCODE:
2593{
2594 AV *defav = GvAV (PL_defgv);
2595 AV *av = newAV ();
2596 int i;
2597 SV *data_sv = newSV (sizeof (struct io_state));
2598 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2599 SvCUR_set (data_sv, sizeof (struct io_state));
2600 SvPOK_only (data_sv);
2601
2602 data->errorno = errno;
2603 data->laststype = PL_laststype;
2604 data->laststatval = PL_laststatval;
2605 data->statcache = PL_statcache;
2606
2607 av_extend (av, AvFILLp (defav) + 1 + 1);
2608
2609 for (i = 0; i <= AvFILLp (defav); ++i)
2610 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2611
2612 av_push (av, data_sv);
2613
2614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2615
2616 api_ready (aTHX_ self);
2617}
2618
2619void
2620_set_state (SV *state)
2621 PROTOTYPE: $
2622 PPCODE:
2623{
2624 AV *av = (AV *)SvRV (state);
2625 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2626 int i;
2627
2628 errno = data->errorno;
2629 PL_laststype = data->laststype;
2630 PL_laststatval = data->laststatval;
2631 PL_statcache = data->statcache;
2632
2633 EXTEND (SP, AvFILLp (av));
2634 for (i = 0; i < AvFILLp (av); ++i)
2635 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2636}
2637
2638
2639MODULE = Coro::State PACKAGE = Coro::AnyEvent
2640
2641BOOT:
2642 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2643
2644void
2645_schedule (...)
2646 CODE:
2647{
2648 static int incede;
2649
1097 api_cede (); 2650 api_cede_notself (aTHX);
1098 2651
2652 ++incede;
2653 while (coro_nready >= incede && api_cede (aTHX))
2654 ;
2655
2656 sv_setsv (sv_activity, &PL_sv_undef);
2657 if (coro_nready >= incede)
2658 {
2659 PUSHMARK (SP);
2660 PUTBACK;
2661 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2662 SPAGAIN;
2663 }
2664
2665 --incede;
2666}
2667
2668
2669MODULE = Coro::State PACKAGE = PerlIO::cede
2670
2671BOOT:
2672 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2673
2674MODULE = Coro::State PACKAGE = Coro::Semaphore
2675
2676SV *
2677new (SV *klass, SV *count_ = 0)
2678 CODE:
2679{
2680 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2681 AV *av = newAV ();
2682 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2683 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2684}
2685 OUTPUT:
2686 RETVAL
2687
2688SV *
2689count (SV *self)
2690 CODE:
2691 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2692 OUTPUT:
2693 RETVAL
2694
2695void
2696up (SV *self, int adjust = 1)
2697 ALIAS:
2698 adjust = 1
2699 CODE:
2700 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2701
2702void
2703down (SV *self)
2704 CODE:
2705 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2706
2707void
2708try (SV *self)
2709 PPCODE:
2710{
2711 AV *av = (AV *)SvRV (self);
2712 SV *count_sv = AvARRAY (av)[0];
2713 IV count = SvIVX (count_sv);
2714
2715 if (count > 0)
2716 {
2717 --count;
2718 SvIVX (count_sv) = count;
2719 XSRETURN_YES;
2720 }
2721 else
2722 XSRETURN_NO;
2723}
2724
2725void
2726waiters (SV *self)
2727 CODE:
2728{
2729 AV *av = (AV *)SvRV (self);
2730
2731 if (GIMME_V == G_SCALAR)
2732 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2733 else
2734 {
2735 int i;
2736 EXTEND (SP, AvFILLp (av) + 1 - 1);
2737 for (i = 1; i <= AvFILLp (av); ++i)
2738 PUSHs (newSVsv (AvARRAY (av)[i]));
2739 }
2740}
2741

Diff Legend

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