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Comparing Coro/Coro/State.xs (file contents):
Revision 1.28 by root, Sat Aug 25 21:32:05 2001 UTC vs.
Revision 1.291 by root, Tue Nov 18 05:55:04 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_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef 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#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
126#else
29#define dSTACKLEVEL void *stacklevel = &stacklevel 127# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
128#endif
30 129
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 130#define IN_DESTRUCT (PL_main_cv == Nullcv)
131
132#if __GNUC__ >= 3
133# define attribute(x) __attribute__(x)
134# define expect(expr,value) __builtin_expect ((expr),(value))
135# define INLINE static inline
136#else
137# define attribute(x)
138# define expect(expr,value) (expr)
139# define INLINE static
140#endif
141
142#define expect_false(expr) expect ((expr) != 0, 0)
143#define expect_true(expr) expect ((expr) != 0, 1)
144
145#define NOINLINE attribute ((noinline))
32 146
33#include "CoroAPI.h" 147#include "CoroAPI.h"
34 148
149#ifdef USE_ITHREADS
150# if CORO_PTHREAD
151static void *coro_thx;
152# endif
153#endif
154
155static double (*nvtime)(); /* so why doesn't it take void? */
156
157/* we hijack an hopefully unused CV flag for our purposes */
158#define CVf_SLF 0x4000
159static OP *pp_slf (pTHX);
160
161static U32 cctx_gen;
162static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 163static struct CoroAPI coroapi;
164static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env;
166static HV *coro_state_stash, *coro_stash;
167static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 168
37/* this is actually not only the c stack but also c registers etc... */ 169static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook;
172static SV *rv_warnhook;
173static HV *hv_sig; /* %SIG */
174
175/* async_pool helper stuff */
176static SV *sv_pool_rss;
177static SV *sv_pool_size;
178static AV *av_async_pool;
179
180/* Coro::AnyEvent */
181static SV *sv_activity;
182
183static struct coro_cctx *cctx_first;
184static int cctx_count, cctx_idle;
185
186enum {
187 CC_MAPPED = 0x01,
188 CC_NOREUSE = 0x02, /* throw this away after tracing */
189 CC_TRACE = 0x04,
190 CC_TRACE_SUB = 0x08, /* trace sub calls */
191 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193};
194
195/* this is a structure representing a c-level coroutine */
38typedef struct { 196typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 197{
40 int usecnt; /* shared by how many coroutines */ 198 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 199
200 /* the stack */
201 void *sptr;
202 size_t ssize;
203
204 /* cpu state */
205 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
206 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
207 JMPENV *top_env;
43 coro_context cctx; 208 coro_context cctx;
44 209
45 void *sptr; 210 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 211#if CORO_USE_VALGRIND
47} coro_stack; 212 int valgrind_id;
213#endif
214 unsigned char flags;
215} coro_cctx;
48 216
217enum {
218 CF_RUNNING = 0x0001, /* coroutine is running */
219 CF_READY = 0x0002, /* coroutine is ready */
220 CF_NEW = 0x0004, /* has never been switched to */
221 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
222};
223
224/* the structure where most of the perl state is stored, overlaid on the cxstack */
225typedef struct
226{
227 SV *defsv;
228 AV *defav;
229 SV *errsv;
230 SV *irsgv;
231#define VAR(name,type) type name;
232# include "state.h"
233#undef VAR
234} perl_slots;
235
236#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
237
238/* this is a structure representing a perl-level coroutine */
49struct coro { 239struct coro {
50 /* the optional C context */ 240 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 241 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 242
55 /* optionally saved, might be zero */ 243 /* state data */
56 AV *defav; 244 struct CoroSLF slf_frame; /* saved slf frame */
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack; 245 AV *mainstack;
68 SV **stack_sp; 246 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 247
92 /* data associated with this coroutine (initial args) */ 248 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 249 int refcnt; /* coroutines are refcounted, yes */
250 int flags; /* CF_ flags */
251 HV *hv; /* the perl hash associated with this coro, if any */
252 void (*on_destroy)(pTHX_ struct coro *coro);
253
254 /* statistics */
255 int usecount; /* number of transfers to this coro */
256
257 /* coro process data */
258 int prio;
259 SV *throw; /* exception to be thrown */
260
261 /* async_pool */
262 SV *saved_deffh;
263
264 /* linked list */
265 struct coro *next, *prev;
94}; 266};
95 267
96typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
98 270
99static AV *main_mainstack; /* used to differentiate between $main and others */ 271/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 272/* and get copied between struct coro and these variables */
273/* the mainr easonw e don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
101static SV *ucoro_state_sv; 275static SV *coro_throw;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 c->dowarn = PL_dowarn;
414 c->in_eval = PL_in_eval;
415
416 c->curstackinfo = PL_curstackinfo;
417 c->curstack = PL_curstack;
418 c->mainstack = PL_mainstack;
419 c->stack_sp = PL_stack_sp;
420 c->op = PL_op;
421 c->curpad = PL_curpad;
422 c->stack_base = PL_stack_base;
423 c->stack_max = PL_stack_max;
424 c->tmps_stack = PL_tmps_stack;
425 c->tmps_floor = PL_tmps_floor;
426 c->tmps_ix = PL_tmps_ix;
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437 c->retstack = PL_retstack;
438 c->retstack_ix = PL_retstack_ix;
439 c->retstack_max = PL_retstack_max;
440 c->curcop = PL_curcop;
441 c->top_env = PL_top_env;
442}
443
444/*
445 * allocate various perl stacks. This is an exact copy
446 * of perl.c:init_stacks, except that it uses less memory
447 * on the assumption that coroutines do not usually need
448 * a lot of stackspace.
449 */
450STATIC void
451coro_init_stacks (pTHX)
452{
453 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
454 PL_curstackinfo->si_type = PERLSI_MAIN;
455 PL_curstack = PL_curstackinfo->si_stack;
456 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
457
458 PL_stack_base = AvARRAY(PL_curstack);
459 PL_stack_sp = PL_stack_base;
460 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
461
462 New(50,PL_tmps_stack,96,SV*);
463 PL_tmps_floor = -1;
464 PL_tmps_ix = -1;
465 PL_tmps_max = 96;
466
467 New(54,PL_markstack,16,I32);
468 PL_markstack_ptr = PL_markstack;
469 PL_markstack_max = PL_markstack + 16;
470
471 SET_MARK_OFFSET;
472
473 New(54,PL_scopestack,16,I32);
474 PL_scopestack_ix = 0;
475 PL_scopestack_max = 16;
476
477 New(54,PL_savestack,96,ANY);
478 PL_savestack_ix = 0;
479 PL_savestack_max = 96;
480
481 New(54,PL_retstack,8,OP*);
482 PL_retstack_ix = 0;
483 PL_retstack_max = 8;
484}
485
486/*
487 * destroy the stacks, the callchain etc...
488 * still there is a memleak of 128 bytes...
489 */
490STATIC void
491destroy_stacks(pTHX)
492{
493 /* is this ugly, I ask? */
494 while (PL_scopestack_ix)
495 LEAVE;
496
497 /* sure it is, but more important: is it correct?? :/ */
498 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499 FREETMPS;
500
501 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next;
503
504 while (PL_curstackinfo)
505 {
506 PERL_SI *p = PL_curstackinfo->si_prev;
507
508 {
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
515 dounwind(-1);
516
517 SvREFCNT_dec(PL_curstackinfo->si_stack);
518 Safefree(PL_curstackinfo->si_cxstack);
519 Safefree(PL_curstackinfo);
520 PL_curstackinfo = p;
521 }
522
523 Safefree(PL_tmps_stack);
524 Safefree(PL_markstack);
525 Safefree(PL_scopestack);
526 Safefree(PL_savestack);
527 Safefree(PL_retstack);
528}
529
530static void
531allocate_stack (Coro__State ctx, int alloc)
532{
533 coro_stack *stack;
534
535 New (0, stack, 1, coro_stack);
536
537 stack->refcnt = 1;
538 stack->usecnt = 1;
539 stack->gencnt = ctx->gencnt = 0;
540 if (alloc)
541 {
542#ifdef HAVE_MMAP
543 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
545 if (stack->sptr == (void *)-1)
546#endif
547 {
548 /*FIXME*//*D*//* reasonable stack size! */
549 stack->ssize = -4096 * sizeof (long);
550 New (0, stack->sptr, 4096, long);
551 }
552 }
553 else
554 stack->sptr = 0;
555
556 ctx->stack = stack;
557}
558
559static void
560deallocate_stack (Coro__State ctx)
561{
562 coro_stack *stack = ctx->stack;
563
564 ctx->stack = 0;
565
566 if (stack)
567 {
568 printf ("deallocating stack %p %d\n", stack, stack->refcnt);/*D*/
569 if (!--stack->refcnt)
570 {
571#ifdef HAVE_MMAP
572 if (stack->ssize > 0 && stack->sptr)
573 munmap (stack->sptr, stack->ssize);
574 else
575#else
576 Safefree (stack->sptr);
577#endif
578 Safefree (stack);
579 }
580 else if (ctx->gencnt == stack->gencnt)
581 --stack->usecnt;
582 }
583}
584
585static void
586setup_coro (void *arg)
587{
588 /*
589 * emulate part of the perl startup here.
590 */
591 dSP;
592 Coro__State ctx = (Coro__State)arg;
593 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
594
595 coro_init_stacks (aTHX);
596 /*PL_curcop = 0;*/
597 /*PL_in_eval = PL_in_eval;*/ /* inherit */
598 SvREFCNT_dec (GvAV (PL_defgv));
599 GvAV (PL_defgv) = ctx->args;
600
601 SPAGAIN;
602
603 if (ctx->stack)
604 {
605 ctx->cursp = 0;
606
607 PUSHMARK(SP);
608 PUTBACK;
609 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
610
611 if (SvTRUE (ERRSV))
612 croak (NULL);
613 else
614 croak ("FATAL: CCTXT coroutine returned!");
615 }
616 else
617 {
618 UNOP myop;
619
620 PL_op = (OP *)&myop;
621
622 Zero(&myop, 1, UNOP);
623 myop.op_next = Nullop;
624 myop.op_flags = OPf_WANT_VOID;
625
626 PUSHMARK(SP);
627 XPUSHs (sub_init);
628 /*
629 * the next line is slightly wrong, as PL_op->op_next
630 * is actually being executed so we skip the first op.
631 * that doesn't matter, though, since it is only
632 * pp_nextstate and we never return...
633 * ah yes, and I don't care anyways ;)
634 */
635 PUTBACK;
636 PL_op = pp_entersub();
637 SPAGAIN;
638
639 ENTER; /* necessary e.g. for dounwind */
640 }
641}
642
643static void
644continue_coro (void *arg)
645{
646 /*
647 * this is a _very_ stripped down perl interpreter ;)
648 */
649 Coro__State ctx = (Coro__State)arg;
650
651 /*FIXME*//* must set up top_env here */
652 ctx->cursp = 0;
653 PL_op = PL_op->op_next;
654 CALLRUNOPS(aTHX);
655
656 abort ();
657}
658
659STATIC void
660transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
661{
662 dSTACKLEVEL;
663 static struct coro *xnext;
664
665 printf ("%p => %p\n", prev, next);/*D*/
666 if (prev != next)
667 {
668 xnext = next;
669
670 if (next->mainstack)
671 {
672 SAVE (prev, flags);
673 LOAD (next);
674
675 /* mark this state as in-use */
676 next->mainstack = 0;
677 next->tmps_ix = -2;
678
679 /* stacklevel changed? if yes, grab the stack for us! */
680 if (flags & TRANSFER_SAVE_CCTXT)
681 {
682 if (!prev->stack)
683 allocate_stack (prev, 0);
684 else if (prev->cursp != stacklevel
685 && prev->stack->usecnt > 1)
686 {
687 prev->gencnt = ++prev->stack->gencnt;
688 prev->stack->usecnt = 1;
689 }
690
691 /* has our stack been invalidated? */
692 if (next->stack && next->stack->gencnt != next->gencnt)
693 {
694 deallocate_stack (next);
695 allocate_stack (next, 1);
696 coro_create (&(next->stack->cctx),
697 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize));
699 }
700
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
702 /* don't add any code here */
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 /* don't add any code here */
734 }
735 }
736 else
737 setup_coro (next);
738 }
739 }
740
741 xnext->cursp = stacklevel;
742}
743
744static struct coro *
745sv_to_coro (SV *arg, const char *funcname, const char *varname)
746{
747 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
748 {
749 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
750
751 if (!he)
752 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
753
754 arg = HeVAL(he);
755 }
756
757 /* must also be changed inside Coro::Cont::yield */
758 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
759 return (struct coro *) SvIV((SV*)SvRV(arg));
760
761 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
762 /*NORETURN*/
763}
764
765static void
766api_transfer(pTHX_ SV *prev, SV *next, int flags)
767{
768 transfer(aTHX_
769 sv_to_coro (prev, "Coro::transfer", "prev"),
770 sv_to_coro (next, "Coro::transfer", "next"),
771 flags);
772}
773 276
774/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
775 278
776#define PRIO_MAX 3 279#define PRIO_MAX 3
777#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
779#define PRIO_LOW -1 282#define PRIO_LOW -1
780#define PRIO_IDLE -3 283#define PRIO_IDLE -3
781#define PRIO_MIN -4 284#define PRIO_MIN -4
782 285
783/* for Coro.pm */ 286/* for Coro.pm */
784static GV *coro_current, *coro_idle; 287static SV *coro_current;
288static SV *coro_readyhook;
785static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
786static int coro_nready; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
787 292
788static void 293/** lowlevel stuff **********************************************************/
789coro_enq (SV *sv) 294
295static SV *
296coro_get_sv (pTHX_ const char *name, int create)
790{ 297{
791 if (SvROK (sv)) 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}
304
305static AV *
306coro_get_av (pTHX_ const char *name, int create)
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}
314
315static HV *
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))
792 { 352 {
793 SV *hv = SvRV (sv); 353 I32 i = AvFILLp (padlist);
794 if (SvTYPE (hv) == SVt_PVHV) 354 while (i >= 0)
795 { 355 {
796 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 356 SV **svp = av_fetch (padlist, i--, FALSE);
797 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 357 if (svp)
358 {
359 SV *sv;
360 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
361 SvREFCNT_dec (sv);
798 362
799 prio = prio > PRIO_MAX ? PRIO_MAX 363 SvREFCNT_dec (*svp);
800 : prio < PRIO_MIN ? PRIO_MIN 364 }
801 : prio;
802
803 av_push (coro_ready [prio - PRIO_MIN], sv);
804 coro_nready++;
805
806 return;
807 } 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 */
382
383 return 0;
384}
385
386#define CORO_MAGIC_type_cv 26
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_NN(sv, type) \
395 (expect_true (SvMAGIC (sv)->mg_type == type) \
396 ? SvMAGIC (sv) \
397 : mg_find (sv, type))
398
399#define CORO_MAGIC(sv, type) \
400 (expect_true (SvMAGIC (sv)) \
401 ? CORO_MAGIC_NN (sv, type) \
402 : 0)
403
404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
408SvSTATE_ (pTHX_ SV *coro)
409{
410 HV *stash;
411 MAGIC *mg;
412
413 if (SvROK (coro))
414 coro = SvRV (coro);
415
416 if (expect_false (SvTYPE (coro) != SVt_PVHV))
417 croak ("Coro::State object required");
418
419 stash = SvSTASH (coro);
420 if (expect_false (stash != coro_stash && stash != coro_state_stash))
421 {
422 /* very slow, but rare, check */
423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
424 croak ("Coro::State object required");
425 }
426
427 mg = CORO_MAGIC_state (coro);
428 return (struct coro *)mg->mg_ptr;
429}
430
431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* faster than SvSTATE, but expects a coroutine hv */
434#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
435#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
436
437/* the next two functions merely cache the padlists */
438static void
439get_padlist (pTHX_ CV *cv)
440{
441 MAGIC *mg = CORO_MAGIC_cv (cv);
442 AV *av;
443
444 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
445 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
446 else
447 {
448#if CORO_PREFER_PERL_FUNCTIONS
449 /* this is probably cleaner? but also slower! */
450 /* in practise, it seems to be less stable */
451 CV *cp = Perl_cv_clone (cv);
452 CvPADLIST (cv) = CvPADLIST (cp);
453 CvPADLIST (cp) = 0;
454 SvREFCNT_dec (cp);
455#else
456 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
457#endif
808 } 458 }
459}
809 460
810 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 461static void
462put_padlist (pTHX_ CV *cv)
463{
464 MAGIC *mg = CORO_MAGIC_cv (cv);
465 AV *av;
466
467 if (expect_false (!mg))
468 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
469
470 av = (AV *)mg->mg_obj;
471
472 if (expect_false (AvFILLp (av) >= AvMAX (av)))
473 av_extend (av, AvMAX (av) + 1);
474
475 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
476}
477
478/** load & save, init *******************************************************/
479
480static void
481load_perl (pTHX_ Coro__State c)
482{
483 perl_slots *slot = c->slot;
484 c->slot = 0;
485
486 PL_mainstack = c->mainstack;
487
488 GvSV (PL_defgv) = slot->defsv;
489 GvAV (PL_defgv) = slot->defav;
490 GvSV (PL_errgv) = slot->errsv;
491 GvSV (irsgv) = slot->irsgv;
492
493 #define VAR(name,type) PL_ ## name = slot->name;
494 # include "state.h"
495 #undef VAR
496
497 {
498 dSP;
499
500 CV *cv;
501
502 /* now do the ugly restore mess */
503 while (expect_true (cv = (CV *)POPs))
504 {
505 put_padlist (aTHX_ cv); /* mark this padlist as available */
506 CvDEPTH (cv) = PTR2IV (POPs);
507 CvPADLIST (cv) = (AV *)POPs;
508 }
509
510 PUTBACK;
511 }
512
513 slf_frame = c->slf_frame;
514 coro_throw = c->throw;
515}
516
517static void
518save_perl (pTHX_ Coro__State c)
519{
520 c->throw = coro_throw;
521 c->slf_frame = slf_frame;
522
523 {
524 dSP;
525 I32 cxix = cxstack_ix;
526 PERL_CONTEXT *ccstk = cxstack;
527 PERL_SI *top_si = PL_curstackinfo;
528
529 /*
530 * the worst thing you can imagine happens first - we have to save
531 * (and reinitialize) all cv's in the whole callchain :(
532 */
533
534 XPUSHs (Nullsv);
535 /* this loop was inspired by pp_caller */
536 for (;;)
537 {
538 while (expect_true (cxix >= 0))
539 {
540 PERL_CONTEXT *cx = &ccstk[cxix--];
541
542 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
543 {
544 CV *cv = cx->blk_sub.cv;
545
546 if (expect_true (CvDEPTH (cv)))
547 {
548 EXTEND (SP, 3);
549 PUSHs ((SV *)CvPADLIST (cv));
550 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
551 PUSHs ((SV *)cv);
552
553 CvDEPTH (cv) = 0;
554 get_padlist (aTHX_ cv);
555 }
556 }
557 }
558
559 if (expect_true (top_si->si_type == PERLSI_MAIN))
560 break;
561
562 top_si = top_si->si_prev;
563 ccstk = top_si->si_cxstack;
564 cxix = top_si->si_cxix;
565 }
566
567 PUTBACK;
568 }
569
570 /* allocate some space on the context stack for our purposes */
571 /* we manually unroll here, as usually 2 slots is enough */
572 if (SLOT_COUNT >= 1) CXINC;
573 if (SLOT_COUNT >= 2) CXINC;
574 if (SLOT_COUNT >= 3) CXINC;
575 {
576 int i;
577 for (i = 3; i < SLOT_COUNT; ++i)
578 CXINC;
579 }
580 cxstack_ix -= SLOT_COUNT; /* undo allocation */
581
582 c->mainstack = PL_mainstack;
583
584 {
585 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
586
587 slot->defav = GvAV (PL_defgv);
588 slot->defsv = DEFSV;
589 slot->errsv = ERRSV;
590 slot->irsgv = GvSV (irsgv);
591
592 #define VAR(name,type) slot->name = PL_ ## name;
593 # include "state.h"
594 #undef VAR
595 }
596}
597
598/*
599 * allocate various perl stacks. This is almost an exact copy
600 * of perl.c:init_stacks, except that it uses less memory
601 * on the (sometimes correct) assumption that coroutines do
602 * not usually need a lot of stackspace.
603 */
604#if CORO_PREFER_PERL_FUNCTIONS
605# define coro_init_stacks init_stacks
606#else
607static void
608coro_init_stacks (pTHX)
609{
610 PL_curstackinfo = new_stackinfo(32, 8);
611 PL_curstackinfo->si_type = PERLSI_MAIN;
612 PL_curstack = PL_curstackinfo->si_stack;
613 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
614
615 PL_stack_base = AvARRAY(PL_curstack);
616 PL_stack_sp = PL_stack_base;
617 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
618
619 New(50,PL_tmps_stack,32,SV*);
620 PL_tmps_floor = -1;
621 PL_tmps_ix = -1;
622 PL_tmps_max = 32;
623
624 New(54,PL_markstack,16,I32);
625 PL_markstack_ptr = PL_markstack;
626 PL_markstack_max = PL_markstack + 16;
627
628#ifdef SET_MARK_OFFSET
629 SET_MARK_OFFSET;
630#endif
631
632 New(54,PL_scopestack,8,I32);
633 PL_scopestack_ix = 0;
634 PL_scopestack_max = 8;
635
636 New(54,PL_savestack,24,ANY);
637 PL_savestack_ix = 0;
638 PL_savestack_max = 24;
639
640#if !PERL_VERSION_ATLEAST (5,10,0)
641 New(54,PL_retstack,4,OP*);
642 PL_retstack_ix = 0;
643 PL_retstack_max = 4;
644#endif
645}
646#endif
647
648/*
649 * destroy the stacks, the callchain etc...
650 */
651static void
652coro_destruct_stacks (pTHX)
653{
654 while (PL_curstackinfo->si_next)
655 PL_curstackinfo = PL_curstackinfo->si_next;
656
657 while (PL_curstackinfo)
658 {
659 PERL_SI *p = PL_curstackinfo->si_prev;
660
661 if (!IN_DESTRUCT)
662 SvREFCNT_dec (PL_curstackinfo->si_stack);
663
664 Safefree (PL_curstackinfo->si_cxstack);
665 Safefree (PL_curstackinfo);
666 PL_curstackinfo = p;
667 }
668
669 Safefree (PL_tmps_stack);
670 Safefree (PL_markstack);
671 Safefree (PL_scopestack);
672 Safefree (PL_savestack);
673#if !PERL_VERSION_ATLEAST (5,10,0)
674 Safefree (PL_retstack);
675#endif
676}
677
678static size_t
679coro_rss (pTHX_ struct coro *coro)
680{
681 size_t rss = sizeof (*coro);
682
683 if (coro->mainstack)
684 {
685 perl_slots tmp_slot;
686 perl_slots *slot;
687
688 if (coro->flags & CF_RUNNING)
689 {
690 slot = &tmp_slot;
691
692 #define VAR(name,type) slot->name = PL_ ## name;
693 # include "state.h"
694 #undef VAR
695 }
696 else
697 slot = coro->slot;
698
699 if (slot)
700 {
701 rss += sizeof (slot->curstackinfo);
702 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
703 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
704 rss += slot->tmps_max * sizeof (SV *);
705 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
706 rss += slot->scopestack_max * sizeof (I32);
707 rss += slot->savestack_max * sizeof (ANY);
708
709#if !PERL_VERSION_ATLEAST (5,10,0)
710 rss += slot->retstack_max * sizeof (OP *);
711#endif
712 }
713 }
714
715 return rss;
716}
717
718/** coroutine stack handling ************************************************/
719
720static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
721static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
723
724/* apparently < 5.8.8 */
725#ifndef MgPV_nolen_const
726#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
727 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
728 (const char*)(mg)->mg_ptr)
729#endif
730
731/*
732 * This overrides the default magic get method of %SIG elements.
733 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
734 * and instead of tryign to save and restore the hash elements, we just provide
735 * readback here.
736 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
737 * not expecting this to actually change the hook. This is a potential problem
738 * when a schedule happens then, but we ignore this.
739 */
740static int
741coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
742{
743 const char *s = MgPV_nolen_const (mg);
744
745 if (*s == '_')
746 {
747 SV **svp = 0;
748
749 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
750 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
751
752 if (svp)
753 {
754 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
755 return 0;
756 }
757 }
758
759 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
760}
761
762static int
763coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
764{
765 const char *s = MgPV_nolen_const (mg);
766
767 if (*s == '_')
768 {
769 SV **svp = 0;
770
771 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773
774 if (svp)
775 {
776 SV *old = *svp;
777 *svp = 0;
778 SvREFCNT_dec (old);
779 return 0;
780 }
781 }
782
783 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
784}
785
786static int
787coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
788{
789 const char *s = MgPV_nolen_const (mg);
790
791 if (*s == '_')
792 {
793 SV **svp = 0;
794
795 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
796 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
797
798 if (svp)
799 {
800 SV *old = *svp;
801 *svp = newSVsv (sv);
802 SvREFCNT_dec (old);
803 return 0;
804 }
805 }
806
807 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
808}
809
810static void
811prepare_nop (pTHX_ struct coro_transfer_args *ta)
812{
813 /* kind of mega-hacky, but works */
814 ta->next = ta->prev = (struct coro *)ta;
815}
816
817static int
818slf_check_nop (pTHX_ struct CoroSLF *frame)
819{
820 return 0;
821}
822
823static UNOP coro_setup_op;
824
825static void NOINLINE /* noinline to keep it out of the transfer fast path */
826coro_setup (pTHX_ struct coro *coro)
827{
828 /*
829 * emulate part of the perl startup here.
830 */
831 coro_init_stacks (aTHX);
832
833 PL_runops = RUNOPS_DEFAULT;
834 PL_curcop = &PL_compiling;
835 PL_in_eval = EVAL_NULL;
836 PL_comppad = 0;
837 PL_curpm = 0;
838 PL_curpad = 0;
839 PL_localizing = 0;
840 PL_dirty = 0;
841 PL_restartop = 0;
842#if PERL_VERSION_ATLEAST (5,10,0)
843 PL_parser = 0;
844#endif
845
846 /* recreate the die/warn hooks */
847 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
848 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
849
850 GvSV (PL_defgv) = newSV (0);
851 GvAV (PL_defgv) = coro->args; coro->args = 0;
852 GvSV (PL_errgv) = newSV (0);
853 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
854 PL_rs = newSVsv (GvSV (irsgv));
855 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
856
857 {
858 dSP;
859 UNOP myop;
860
861 Zero (&myop, 1, UNOP);
862 myop.op_next = Nullop;
863 myop.op_flags = OPf_WANT_VOID;
864
865 PUSHMARK (SP);
866 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
867 PUTBACK;
868 PL_op = (OP *)&myop;
869 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
870 SPAGAIN;
871 }
872
873 /* this newly created coroutine might be run on an existing cctx which most
874 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
875 */
876 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
877 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
878
879 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
880 coro_setup_op.op_type = OP_CUSTOM;
881 coro_setup_op.op_ppaddr = pp_slf;
882 coro_setup_op.op_next = PL_op;
883
884 PL_op = (OP *)&coro_setup_op;
885
886 /* copy throw, in case it was set before coro_setup */
887 coro_throw = coro->throw;
888}
889
890static void
891coro_destruct (pTHX_ struct coro *coro)
892{
893 if (!IN_DESTRUCT)
894 {
895 /* restore all saved variables and stuff */
896 LEAVE_SCOPE (0);
897 assert (PL_tmps_floor == -1);
898
899 /* free all temporaries */
900 FREETMPS;
901 assert (PL_tmps_ix == -1);
902
903 /* unwind all extra stacks */
904 POPSTACK_TO (PL_mainstack);
905
906 /* unwind main stack */
907 dounwind (-1);
908 }
909
910 SvREFCNT_dec (GvSV (PL_defgv));
911 SvREFCNT_dec (GvAV (PL_defgv));
912 SvREFCNT_dec (GvSV (PL_errgv));
913 SvREFCNT_dec (PL_defoutgv);
914 SvREFCNT_dec (PL_rs);
915 SvREFCNT_dec (GvSV (irsgv));
916
917 SvREFCNT_dec (PL_diehook);
918 SvREFCNT_dec (PL_warnhook);
919
920 SvREFCNT_dec (coro->saved_deffh);
921 SvREFCNT_dec (coro_throw);
922
923 coro_destruct_stacks (aTHX);
924}
925
926INLINE void
927free_coro_mortal (pTHX)
928{
929 if (expect_true (coro_mortal))
930 {
931 SvREFCNT_dec (coro_mortal);
932 coro_mortal = 0;
933 }
934}
935
936static int
937runops_trace (pTHX)
938{
939 COP *oldcop = 0;
940 int oldcxix = -2;
941 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
942 coro_cctx *cctx = coro->cctx;
943
944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945 {
946 PERL_ASYNC_CHECK ();
947
948 if (cctx->flags & CC_TRACE_ALL)
949 {
950 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
951 {
952 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
953 SV **bot, **top;
954 AV *av = newAV (); /* return values */
955 SV **cb;
956 dSP;
957
958 GV *gv = CvGV (cx->blk_sub.cv);
959 SV *fullname = sv_2mortal (newSV (0));
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 bot = PL_stack_base + cx->blk_oldsp + 1;
964 top = cx->blk_gimme == G_ARRAY ? SP + 1
965 : cx->blk_gimme == G_SCALAR ? bot + 1
966 : bot;
967
968 av_extend (av, top - bot);
969 while (bot < top)
970 av_push (av, SvREFCNT_inc_NN (*bot++));
971
972 PL_runops = RUNOPS_DEFAULT;
973 ENTER;
974 SAVETMPS;
975 EXTEND (SP, 3);
976 PUSHMARK (SP);
977 PUSHs (&PL_sv_no);
978 PUSHs (fullname);
979 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
980 PUTBACK;
981 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
982 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
983 SPAGAIN;
984 FREETMPS;
985 LEAVE;
986 PL_runops = runops_trace;
987 }
988
989 if (oldcop != PL_curcop)
990 {
991 oldcop = PL_curcop;
992
993 if (PL_curcop != &PL_compiling)
994 {
995 SV **cb;
996
997 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
998 {
999 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1000
1001 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1002 {
1003 runops_proc_t old_runops = PL_runops;
1004 dSP;
1005 GV *gv = CvGV (cx->blk_sub.cv);
1006 SV *fullname = sv_2mortal (newSV (0));
1007
1008 if (isGV (gv))
1009 gv_efullname3 (fullname, gv, 0);
1010
1011 PL_runops = RUNOPS_DEFAULT;
1012 ENTER;
1013 SAVETMPS;
1014 EXTEND (SP, 3);
1015 PUSHMARK (SP);
1016 PUSHs (&PL_sv_yes);
1017 PUSHs (fullname);
1018 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1019 PUTBACK;
1020 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1021 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1022 SPAGAIN;
1023 FREETMPS;
1024 LEAVE;
1025 PL_runops = runops_trace;
1026 }
1027
1028 oldcxix = cxstack_ix;
1029 }
1030
1031 if (cctx->flags & CC_TRACE_LINE)
1032 {
1033 dSP;
1034
1035 PL_runops = RUNOPS_DEFAULT;
1036 ENTER;
1037 SAVETMPS;
1038 EXTEND (SP, 3);
1039 PL_runops = RUNOPS_DEFAULT;
1040 PUSHMARK (SP);
1041 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1042 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1043 PUTBACK;
1044 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1045 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1046 SPAGAIN;
1047 FREETMPS;
1048 LEAVE;
1049 PL_runops = runops_trace;
1050 }
1051 }
1052 }
1053 }
1054 }
1055
1056 TAINT_NOT;
1057 return 0;
1058}
1059
1060static struct coro_cctx *cctx_ssl_cctx;
1061static struct CoroSLF cctx_ssl_frame;
1062
1063static void
1064slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1065{
1066 ta->prev = (struct coro *)cctx_ssl_cctx;
1067 ta->next = 0;
1068}
1069
1070static int
1071slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1072{
1073 *frame = cctx_ssl_frame;
1074
1075 return 1;
1076}
1077
1078/* initialises PL_top_env and injects a pseudo-slf-call to sett he stacklevel */
1079static void NOINLINE
1080cctx_prepare (pTHX_ coro_cctx *cctx)
1081{
1082 PL_top_env = &PL_start_env;
1083
1084 if (cctx->flags & CC_TRACE)
1085 PL_runops = runops_trace;
1086
1087 /* we already must be in an SLF call, there is no other valid way
1088 * that can lead to creation of a new cctx */
1089 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1090 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1091
1092 cctx_ssl_cctx = cctx;
1093 cctx_ssl_frame = slf_frame;
1094
1095 slf_frame.prepare = slf_prepare_set_stacklevel;
1096 slf_frame.check = slf_check_set_stacklevel;
1097}
1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 free_coro_mortal (aTHX);
1104}
1105
1106/*
1107 * this is a _very_ stripped down perl interpreter ;)
1108 */
1109static void
1110cctx_run (void *arg)
1111{
1112#ifdef USE_ITHREADS
1113# if CORO_PTHREAD
1114 PERL_SET_CONTEXT (coro_thx);
1115# endif
1116#endif
1117 {
1118 dTHX;
1119
1120 /* normally we would need to skip the entersub here */
1121 /* not doing so will re-execute it, which is exactly what we want */
1122 /* PL_nop = PL_nop->op_next */
1123
1124 /* inject a fake subroutine call to cctx_init */
1125 cctx_prepare (aTHX_ (coro_cctx *)arg);
1126
1127 /* cctx_run is the alternative tail of transfer() */
1128 transfer_tail (aTHX);
1129
1130 /* somebody or something will hit me for both perl_run and PL_restartop */
1131 PL_restartop = PL_op;
1132 perl_run (PL_curinterp);
1133
1134 /*
1135 * If perl-run returns we assume exit() was being called or the coro
1136 * fell off the end, which seems to be the only valid (non-bug)
1137 * reason for perl_run to return. We try to exit by jumping to the
1138 * bootstrap-time "top" top_env, as we cannot restore the "main"
1139 * coroutine as Coro has no such concept
1140 */
1141 PL_top_env = main_top_env;
1142 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1143 }
1144}
1145
1146static coro_cctx *
1147cctx_new ()
1148{
1149 coro_cctx *cctx;
1150
1151 ++cctx_count;
1152 New (0, cctx, 1, coro_cctx);
1153
1154 cctx->gen = cctx_gen;
1155 cctx->flags = 0;
1156 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1157
1158 return cctx;
1159}
1160
1161/* create a new cctx only suitable as source */
1162static coro_cctx *
1163cctx_new_empty ()
1164{
1165 coro_cctx *cctx = cctx_new ();
1166
1167 cctx->sptr = 0;
1168 coro_create (&cctx->cctx, 0, 0, 0, 0);
1169
1170 return cctx;
1171}
1172
1173/* create a new cctx suitable as destination/running a perl interpreter */
1174static coro_cctx *
1175cctx_new_run ()
1176{
1177 coro_cctx *cctx = cctx_new ();
1178 void *stack_start;
1179 size_t stack_size;
1180
1181#if HAVE_MMAP
1182 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1183 /* mmap supposedly does allocate-on-write for us */
1184 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1185
1186 if (cctx->sptr != (void *)-1)
1187 {
1188 #if CORO_STACKGUARD
1189 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1190 #endif
1191 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1192 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1193 cctx->flags |= CC_MAPPED;
1194 }
1195 else
1196#endif
1197 {
1198 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1199 New (0, cctx->sptr, cctx_stacksize, long);
1200
1201 if (!cctx->sptr)
1202 {
1203 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1204 _exit (EXIT_FAILURE);
1205 }
1206
1207 stack_start = cctx->sptr;
1208 stack_size = cctx->ssize;
1209 }
1210
1211 #if CORO_USE_VALGRIND
1212 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1213 #endif
1214
1215 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1216
1217 return cctx;
1218}
1219
1220static void
1221cctx_destroy (coro_cctx *cctx)
1222{
1223 if (!cctx)
1224 return;
1225
1226 --cctx_count;
1227 coro_destroy (&cctx->cctx);
1228
1229 /* coro_transfer creates new, empty cctx's */
1230 if (cctx->sptr)
1231 {
1232 #if CORO_USE_VALGRIND
1233 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1234 #endif
1235
1236#if HAVE_MMAP
1237 if (cctx->flags & CC_MAPPED)
1238 munmap (cctx->sptr, cctx->ssize);
1239 else
1240#endif
1241 Safefree (cctx->sptr);
1242 }
1243
1244 Safefree (cctx);
1245}
1246
1247/* wether this cctx should be destructed */
1248#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1249
1250static coro_cctx *
1251cctx_get (pTHX)
1252{
1253 while (expect_true (cctx_first))
1254 {
1255 coro_cctx *cctx = cctx_first;
1256 cctx_first = cctx->next;
1257 --cctx_idle;
1258
1259 if (expect_true (!CCTX_EXPIRED (cctx)))
1260 return cctx;
1261
1262 cctx_destroy (cctx);
1263 }
1264
1265 return cctx_new_run ();
1266}
1267
1268static void
1269cctx_put (coro_cctx *cctx)
1270{
1271 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1272
1273 /* free another cctx if overlimit */
1274 if (expect_false (cctx_idle >= cctx_max_idle))
1275 {
1276 coro_cctx *first = cctx_first;
1277 cctx_first = first->next;
1278 --cctx_idle;
1279
1280 cctx_destroy (first);
1281 }
1282
1283 ++cctx_idle;
1284 cctx->next = cctx_first;
1285 cctx_first = cctx;
1286}
1287
1288/** coroutine switching *****************************************************/
1289
1290static void
1291transfer_check (pTHX_ struct coro *prev, struct coro *next)
1292{
1293 /* TODO: throwing up here is considered harmful */
1294
1295 if (expect_true (prev != next))
1296 {
1297 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1298 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1299
1300 if (expect_false (next->flags & CF_RUNNING))
1301 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1302
1303 if (expect_false (next->flags & CF_DESTROYED))
1304 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1305
1306#if !PERL_VERSION_ATLEAST (5,10,0)
1307 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1308 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1309#endif
1310 }
1311}
1312
1313/* always use the TRANSFER macro */
1314static void NOINLINE /* noinline so we have a fixed stackframe */
1315transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1316{
1317 dSTACKLEVEL;
1318
1319 /* sometimes transfer is only called to set idle_sp */
1320 if (expect_false (!next))
1321 {
1322 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1323 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1324 }
1325 else if (expect_true (prev != next))
1326 {
1327 coro_cctx *prev__cctx;
1328
1329 if (expect_false (prev->flags & CF_NEW))
1330 {
1331 /* create a new empty/source context */
1332 prev->cctx = cctx_new_empty ();
1333 prev->flags &= ~CF_NEW;
1334 prev->flags |= CF_RUNNING;
1335 }
1336
1337 prev->flags &= ~CF_RUNNING;
1338 next->flags |= CF_RUNNING;
1339
1340 /* first get rid of the old state */
1341 save_perl (aTHX_ prev);
1342
1343 if (expect_false (next->flags & CF_NEW))
1344 {
1345 /* need to start coroutine */
1346 next->flags &= ~CF_NEW;
1347 /* setup coroutine call */
1348 coro_setup (aTHX_ next);
1349 }
1350 else
1351 load_perl (aTHX_ next);
1352
1353 prev__cctx = prev->cctx;
1354
1355 /* possibly untie and reuse the cctx */
1356 if (expect_true (
1357 prev__cctx->idle_sp == (void *)stacklevel
1358 && !(prev__cctx->flags & CC_TRACE)
1359 && !force_cctx
1360 ))
1361 {
1362 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1363 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1364
1365 prev->cctx = 0;
1366
1367 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1368 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1369 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1370 if (!next->cctx)
1371 next->cctx = cctx_get (aTHX);
1372
1373 cctx_put (prev__cctx);
1374 }
1375
1376 ++next->usecount;
1377
1378 if (expect_true (!next->cctx))
1379 next->cctx = cctx_get (aTHX);
1380
1381 if (expect_false (prev__cctx != next->cctx))
1382 {
1383 prev__cctx->top_env = PL_top_env;
1384 PL_top_env = next->cctx->top_env;
1385 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1386 }
1387
1388 transfer_tail (aTHX);
1389 }
1390}
1391
1392#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1393#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1394
1395/** high level stuff ********************************************************/
1396
1397static int
1398coro_state_destroy (pTHX_ struct coro *coro)
1399{
1400 if (coro->flags & CF_DESTROYED)
1401 return 0;
1402
1403 if (coro->on_destroy)
1404 coro->on_destroy (aTHX_ coro);
1405
1406 coro->flags |= CF_DESTROYED;
1407
1408 if (coro->flags & CF_READY)
1409 {
1410 /* reduce nready, as destroying a ready coro effectively unreadies it */
1411 /* alternative: look through all ready queues and remove the coro */
1412 --coro_nready;
1413 }
1414 else
1415 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1416
1417 if (coro->mainstack && coro->mainstack != main_mainstack)
1418 {
1419 struct coro temp;
1420
1421 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1422
1423 save_perl (aTHX_ &temp);
1424 load_perl (aTHX_ coro);
1425
1426 coro_destruct (aTHX_ coro);
1427
1428 load_perl (aTHX_ &temp);
1429
1430 coro->slot = 0;
1431 }
1432
1433 cctx_destroy (coro->cctx);
1434 SvREFCNT_dec (coro->args);
1435
1436 if (coro->next) coro->next->prev = coro->prev;
1437 if (coro->prev) coro->prev->next = coro->next;
1438 if (coro == coro_first) coro_first = coro->next;
1439
1440 return 1;
1441}
1442
1443static int
1444coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1445{
1446 struct coro *coro = (struct coro *)mg->mg_ptr;
1447 mg->mg_ptr = 0;
1448
1449 coro->hv = 0;
1450
1451 if (--coro->refcnt < 0)
1452 {
1453 coro_state_destroy (aTHX_ coro);
1454 Safefree (coro);
1455 }
1456
1457 return 0;
1458}
1459
1460static int
1461coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1462{
1463 struct coro *coro = (struct coro *)mg->mg_ptr;
1464
1465 ++coro->refcnt;
1466
1467 return 0;
1468}
1469
1470static MGVTBL coro_state_vtbl = {
1471 0, 0, 0, 0,
1472 coro_state_free,
1473 0,
1474#ifdef MGf_DUP
1475 coro_state_dup,
1476#else
1477# define MGf_DUP 0
1478#endif
1479};
1480
1481static void
1482prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1483{
1484 ta->prev = SvSTATE (prev_sv);
1485 ta->next = SvSTATE (next_sv);
1486 TRANSFER_CHECK (*ta);
1487}
1488
1489static void
1490api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1491{
1492 struct coro_transfer_args ta;
1493
1494 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1495 TRANSFER (ta, 1);
1496}
1497
1498/** Coro ********************************************************************/
1499
1500INLINE void
1501coro_enq (pTHX_ struct coro *coro)
1502{
1503 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1504}
1505
1506INLINE SV *
1507coro_deq (pTHX)
1508{
1509 int prio;
1510
1511 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1512 if (AvFILLp (coro_ready [prio]) >= 0)
1513 return av_shift (coro_ready [prio]);
1514
1515 return 0;
1516}
1517
1518static int
1519api_ready (pTHX_ SV *coro_sv)
1520{
1521 struct coro *coro;
1522 SV *sv_hook;
1523 void (*xs_hook)(void);
1524
1525 if (SvROK (coro_sv))
1526 coro_sv = SvRV (coro_sv);
1527
1528 coro = SvSTATE (coro_sv);
1529
1530 if (coro->flags & CF_READY)
1531 return 0;
1532
1533 coro->flags |= CF_READY;
1534
1535 sv_hook = coro_nready ? 0 : coro_readyhook;
1536 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1537
1538 coro_enq (aTHX_ coro);
1539 ++coro_nready;
1540
1541 if (sv_hook)
1542 {
1543 dSP;
1544
1545 ENTER;
1546 SAVETMPS;
1547
1548 PUSHMARK (SP);
1549 PUTBACK;
1550 call_sv (sv_hook, G_VOID | G_DISCARD);
1551
1552 FREETMPS;
1553 LEAVE;
1554 }
1555
1556 if (xs_hook)
1557 xs_hook ();
1558
1559 return 1;
1560}
1561
1562static int
1563api_is_ready (pTHX_ SV *coro_sv)
1564{
1565 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1566}
1567
1568INLINE void
1569prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1570{
1571 SV *prev_sv, *next_sv;
1572
1573 for (;;)
1574 {
1575 next_sv = coro_deq (aTHX);
1576
1577 /* nothing to schedule: call the idle handler */
1578 if (expect_false (!next_sv))
1579 {
1580 dSP;
1581
1582 ENTER;
1583 SAVETMPS;
1584
1585 PUSHMARK (SP);
1586 PUTBACK;
1587 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1588
1589 FREETMPS;
1590 LEAVE;
1591 continue;
1592 }
1593
1594 ta->next = SvSTATE_hv (next_sv);
1595
1596 /* cannot transfer to destroyed coros, skip and look for next */
1597 if (expect_false (ta->next->flags & CF_DESTROYED))
1598 {
1599 SvREFCNT_dec (next_sv);
1600 /* coro_nready has already been taken care of by destroy */
1601 continue;
1602 }
1603
1604 --coro_nready;
1605 break;
1606 }
1607
1608 /* free this only after the transfer */
1609 prev_sv = SvRV (coro_current);
1610 ta->prev = SvSTATE_hv (prev_sv);
1611 TRANSFER_CHECK (*ta);
1612 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1613 ta->next->flags &= ~CF_READY;
1614 SvRV_set (coro_current, next_sv);
1615
1616 free_coro_mortal (aTHX);
1617 coro_mortal = prev_sv;
1618}
1619
1620INLINE void
1621prepare_cede (pTHX_ struct coro_transfer_args *ta)
1622{
1623 api_ready (aTHX_ coro_current);
1624 prepare_schedule (aTHX_ ta);
1625}
1626
1627INLINE void
1628prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1629{
1630 SV *prev = SvRV (coro_current);
1631
1632 if (coro_nready)
1633 {
1634 prepare_schedule (aTHX_ ta);
1635 api_ready (aTHX_ prev);
1636 }
1637 else
1638 prepare_nop (aTHX_ ta);
1639}
1640
1641static void
1642api_schedule (pTHX)
1643{
1644 struct coro_transfer_args ta;
1645
1646 prepare_schedule (aTHX_ &ta);
1647 TRANSFER (ta, 1);
1648}
1649
1650static int
1651api_cede (pTHX)
1652{
1653 struct coro_transfer_args ta;
1654
1655 prepare_cede (aTHX_ &ta);
1656
1657 if (expect_true (ta.prev != ta.next))
1658 {
1659 TRANSFER (ta, 1);
1660 return 1;
1661 }
1662 else
1663 return 0;
1664}
1665
1666static int
1667api_cede_notself (pTHX)
1668{
1669 if (coro_nready)
1670 {
1671 struct coro_transfer_args ta;
1672
1673 prepare_cede_notself (aTHX_ &ta);
1674 TRANSFER (ta, 1);
1675 return 1;
1676 }
1677 else
1678 return 0;
1679}
1680
1681static void
1682api_trace (pTHX_ SV *coro_sv, int flags)
1683{
1684 struct coro *coro = SvSTATE (coro_sv);
1685
1686 if (flags & CC_TRACE)
1687 {
1688 if (!coro->cctx)
1689 coro->cctx = cctx_new_run ();
1690 else if (!(coro->cctx->flags & CC_TRACE))
1691 croak ("cannot enable tracing on coroutine with custom stack,");
1692
1693 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1694 }
1695 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1696 {
1697 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1698
1699 if (coro->flags & CF_RUNNING)
1700 PL_runops = RUNOPS_DEFAULT;
1701 else
1702 coro->slot->runops = RUNOPS_DEFAULT;
1703 }
1704}
1705
1706/*****************************************************************************/
1707/* schedule-like-function opcode (SLF) */
1708
1709static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1710static const CV *slf_cv;
1711static SV **slf_argv;
1712static int slf_argc, slf_arga; /* count, allocated */
1713static I32 slf_ax; /* top of stack, for restore */
1714
1715/* this restores the stack in the case we patched the entersub, to */
1716/* recreate the stack frame as perl will on following calls */
1717/* since entersub cleared the stack */
1718static OP *
1719pp_restore (pTHX)
1720{
1721 int i;
1722 SV **SP = PL_stack_base + slf_ax;
1723
1724 PUSHMARK (SP);
1725
1726 EXTEND (SP, slf_argc + 1);
1727
1728 for (i = 0; i < slf_argc; ++i)
1729 PUSHs (sv_2mortal (slf_argv [i]));
1730
1731 PUSHs ((SV *)CvGV (slf_cv));
1732
1733 RETURNOP (slf_restore.op_first);
1734}
1735
1736static void
1737slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1738{
1739 SV **arg = (SV **)slf_frame.data;
1740
1741 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1742}
1743
1744static void
1745slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1746{
1747 if (items != 2)
1748 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1749
1750 frame->prepare = slf_prepare_transfer;
1751 frame->check = slf_check_nop;
1752 frame->data = (void *)arg; /* let's hope it will stay valid */
1753}
1754
1755static void
1756slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1757{
1758 frame->prepare = prepare_schedule;
1759 frame->check = slf_check_nop;
1760}
1761
1762static void
1763slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1764{
1765 frame->prepare = prepare_cede;
1766 frame->check = slf_check_nop;
1767}
1768
1769static void
1770slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1771{
1772 frame->prepare = prepare_cede_notself;
1773 frame->check = slf_check_nop;
1774}
1775
1776/*
1777 * these not obviously related functions are all rolled into one
1778 * function to increase chances that they all will call transfer with the same
1779 * stack offset
1780 * SLF stands for "schedule-like-function".
1781 */
1782static OP *
1783pp_slf (pTHX)
1784{
1785 I32 checkmark; /* mark SP to see how many elements check has pushed */
1786
1787 /* set up the slf frame, unless it has already been set-up */
1788 /* the latter happens when a new coro has been started */
1789 /* or when a new cctx was attached to an existing coroutine */
1790 if (expect_true (!slf_frame.prepare))
1791 {
1792 /* first iteration */
1793 dSP;
1794 SV **arg = PL_stack_base + TOPMARK + 1;
1795 int items = SP - arg; /* args without function object */
1796 SV *gv = *sp;
1797
1798 /* do a quick consistency check on the "function" object, and if it isn't */
1799 /* for us, divert to the real entersub */
1800 if (SvTYPE (gv) != SVt_PVGV
1801 || !GvCV (gv)
1802 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1803 return PL_ppaddr[OP_ENTERSUB](aTHX);
1804
1805 if (!(PL_op->op_flags & OPf_STACKED))
1806 {
1807 /* ampersand-form of call, use @_ instead of stack */
1808 AV *av = GvAV (PL_defgv);
1809 arg = AvARRAY (av);
1810 items = AvFILLp (av) + 1;
1811 }
1812
1813 /* now call the init function, which needs to set up slf_frame */
1814 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1815 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1816
1817 /* pop args */
1818 SP = PL_stack_base + POPMARK;
1819
1820 PUTBACK;
1821 }
1822
1823 /* now that we have a slf_frame, interpret it! */
1824 /* we use a callback system not to make the code needlessly */
1825 /* complicated, but so we can run multiple perl coros from one cctx */
1826
1827 do
1828 {
1829 struct coro_transfer_args ta;
1830
1831 slf_frame.prepare (aTHX_ &ta);
1832 TRANSFER (ta, 0);
1833
1834 checkmark = PL_stack_sp - PL_stack_base;
1835 }
1836 while (slf_frame.check (aTHX_ &slf_frame));
1837
1838 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1839
1840 /* return value handling - mostly like entersub */
1841 /* make sure we put something on the stack in scalar context */
1842 if (GIMME_V == G_SCALAR)
1843 {
1844 dSP;
1845 SV **bot = PL_stack_base + checkmark;
1846
1847 if (sp == bot) /* too few, push undef */
1848 bot [1] = &PL_sv_undef;
1849 else if (sp != bot + 1) /* too many, take last one */
1850 bot [1] = *sp;
1851
1852 SP = bot + 1;
1853
1854 PUTBACK;
1855 }
1856
1857 /* exception handling */
1858 if (expect_false (coro_throw))
1859 {
1860 SV *exception = sv_2mortal (coro_throw);
1861
1862 coro_throw = 0;
1863 sv_setsv (ERRSV, exception);
1864 croak (0);
1865 }
1866
1867 return NORMAL;
1868}
1869
1870static void
1871api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1872{
1873 int i;
1874 SV **arg = PL_stack_base + ax;
1875 int items = PL_stack_sp - arg + 1;
1876
1877 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1878
1879 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1880 && PL_op->op_ppaddr != pp_slf)
1881 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1882
1883 CvFLAGS (cv) |= CVf_SLF;
1884 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1885 slf_cv = cv;
1886
1887 /* we patch the op, and then re-run the whole call */
1888 /* we have to put the same argument on the stack for this to work */
1889 /* and this will be done by pp_restore */
1890 slf_restore.op_next = (OP *)&slf_restore;
1891 slf_restore.op_type = OP_CUSTOM;
1892 slf_restore.op_ppaddr = pp_restore;
1893 slf_restore.op_first = PL_op;
1894
1895 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1896
1897 if (PL_op->op_flags & OPf_STACKED)
1898 {
1899 if (items > slf_arga)
1900 {
1901 slf_arga = items;
1902 free (slf_argv);
1903 slf_argv = malloc (slf_arga * sizeof (SV *));
1904 }
1905
1906 slf_argc = items;
1907
1908 for (i = 0; i < items; ++i)
1909 slf_argv [i] = SvREFCNT_inc (arg [i]);
1910 }
1911 else
1912 slf_argc = 0;
1913
1914 PL_op->op_ppaddr = pp_slf;
1915 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1916
1917 PL_op = (OP *)&slf_restore;
1918}
1919
1920/*****************************************************************************/
1921/* PerlIO::cede */
1922
1923typedef struct
1924{
1925 PerlIOBuf base;
1926 NV next, every;
1927} PerlIOCede;
1928
1929static IV
1930PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1931{
1932 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1933
1934 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1935 self->next = nvtime () + self->every;
1936
1937 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
811} 1938}
812 1939
813static SV * 1940static SV *
814coro_deq (int min_prio) 1941PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
815{ 1942{
816 int prio = PRIO_MAX - PRIO_MIN; 1943 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
817 1944
818 min_prio -= PRIO_MIN; 1945 return newSVnv (self->every);
819 if (min_prio < 0) 1946}
820 min_prio = 0;
821 1947
822 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1948static IV
823 if (av_len (coro_ready[prio]) >= 0) 1949PerlIOCede_flush (pTHX_ PerlIO *f)
1950{
1951 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1952 double now = nvtime ();
1953
1954 if (now >= self->next)
824 { 1955 {
825 coro_nready--; 1956 api_cede (aTHX);
826 return av_shift (coro_ready[prio]); 1957 self->next = now + self->every;
827 } 1958 }
1959
1960 return PerlIOBuf_flush (aTHX_ f);
1961}
1962
1963static PerlIO_funcs PerlIO_cede =
1964{
1965 sizeof(PerlIO_funcs),
1966 "cede",
1967 sizeof(PerlIOCede),
1968 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1969 PerlIOCede_pushed,
1970 PerlIOBuf_popped,
1971 PerlIOBuf_open,
1972 PerlIOBase_binmode,
1973 PerlIOCede_getarg,
1974 PerlIOBase_fileno,
1975 PerlIOBuf_dup,
1976 PerlIOBuf_read,
1977 PerlIOBuf_unread,
1978 PerlIOBuf_write,
1979 PerlIOBuf_seek,
1980 PerlIOBuf_tell,
1981 PerlIOBuf_close,
1982 PerlIOCede_flush,
1983 PerlIOBuf_fill,
1984 PerlIOBase_eof,
1985 PerlIOBase_error,
1986 PerlIOBase_clearerr,
1987 PerlIOBase_setlinebuf,
1988 PerlIOBuf_get_base,
1989 PerlIOBuf_bufsiz,
1990 PerlIOBuf_get_ptr,
1991 PerlIOBuf_get_cnt,
1992 PerlIOBuf_set_ptrcnt,
1993};
1994
1995/*****************************************************************************/
1996/* Coro::Semaphore */
1997
1998static void
1999coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2000{
2001 SV *count_sv = AvARRAY (av)[0];
2002 IV count = SvIVX (count_sv);
2003
2004 count += adjust;
2005 SvIVX (count_sv) = count;
2006
2007 /* now wake up as many waiters as are expected to lock */
2008 while (count > 0 && AvFILLp (av) > 0)
2009 {
2010 SV *cb;
2011
2012 /* swap first two elements so we can shift a waiter */
2013 AvARRAY (av)[0] = AvARRAY (av)[1];
2014 AvARRAY (av)[1] = count_sv;
2015 cb = av_shift (av);
2016
2017 if (SvOBJECT (cb))
2018 api_ready (aTHX_ cb);
2019 else
2020 croak ("callbacks not yet supported");
2021
2022 SvREFCNT_dec (cb);
2023
2024 --count;
2025 }
2026}
2027
2028static void
2029coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2030{
2031 /* call $sem->adjust (0) to possibly wake up some other waiters */
2032 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2033}
2034
2035static int
2036slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2037{
2038 AV *av = (AV *)frame->data;
2039 SV *count_sv = AvARRAY (av)[0];
2040
2041 if (SvIVX (count_sv) > 0)
2042 {
2043 SvSTATE_current->on_destroy = 0;
2044 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2045 return 0;
2046 }
2047 else
2048 {
2049 int i;
2050 /* if we were woken up but can't down, we look through the whole */
2051 /* waiters list and only add us if we aren't in there already */
2052 /* this avoids some degenerate memory usage cases */
2053
2054 for (i = 1; i <= AvFILLp (av); ++i)
2055 if (AvARRAY (av)[i] == SvRV (coro_current))
2056 return 1;
2057
2058 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2059 return 1;
2060 }
2061}
2062
2063static void
2064slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2065{
2066 AV *av = (AV *)SvRV (arg [0]);
2067
2068 if (SvIVX (AvARRAY (av)[0]) > 0)
2069 {
2070 frame->data = (void *)av;
2071 frame->prepare = prepare_nop;
2072 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2073 }
2074 else
2075 {
2076 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2077
2078 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2079 frame->prepare = prepare_schedule;
2080
2081 /* to avoid race conditions when a woken-up coro gets terminated */
2082 /* we arrange for a temporary on_destroy that calls adjust (0) */
2083 assert (!SvSTATE_current->on_destroy);//D
2084 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2085 }
2086
2087 frame->check = slf_check_semaphore_down;
2088
2089}
2090
2091/*****************************************************************************/
2092/* gensub: simple closure generation utility */
2093
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2095
2096/* create a closure from XS, returns a code reference */
2097/* the arg can be accessed via GENSUB_ARG from the callback */
2098/* the callback must use dXSARGS/XSRETURN */
2099static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2101{
2102 CV *cv = (CV *)newSV (0);
2103
2104 sv_upgrade ((SV *)cv, SVt_PVCV);
2105
2106 CvANON_on (cv);
2107 CvISXSUB_on (cv);
2108 CvXSUB (cv) = xsub;
2109 GENSUB_ARG = arg;
2110
2111 return newRV_noinc ((SV *)cv);
2112}
2113
2114/*****************************************************************************/
2115/* Coro::AIO */
2116
2117#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2118
2119/* helper storage struct */
2120struct io_state
2121{
2122 int errorno;
2123 I32 laststype; /* U16 in 5.10.0 */
2124 int laststatval;
2125 Stat_t statcache;
2126};
2127
2128static void
2129coro_aio_callback (pTHX_ CV *cv)
2130{
2131 dXSARGS;
2132 AV *state = (AV *)GENSUB_ARG;
2133 SV *coro = av_pop (state);
2134 SV *data_sv = newSV (sizeof (struct io_state));
2135
2136 av_extend (state, items);
2137
2138 sv_upgrade (data_sv, SVt_PV);
2139 SvCUR_set (data_sv, sizeof (struct io_state));
2140 SvPOK_only (data_sv);
2141
2142 {
2143 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2144
2145 data->errorno = errno;
2146 data->laststype = PL_laststype;
2147 data->laststatval = PL_laststatval;
2148 data->statcache = PL_statcache;
2149 }
2150
2151 /* now build the result vector out of all the parameters and the data_sv */
2152 {
2153 int i;
2154
2155 for (i = 0; i < items; ++i)
2156 av_push (state, SvREFCNT_inc_NN (ST (i)));
2157 }
2158
2159 av_push (state, data_sv);
2160
2161 api_ready (aTHX_ coro);
2162 SvREFCNT_dec (coro);
2163 SvREFCNT_dec ((AV *)state);
2164}
2165
2166static int
2167slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2168{
2169 AV *state = (AV *)frame->data;
2170
2171 /* one element that is an RV? repeat! */
2172 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2173 return 1;
2174
2175 /* restore status */
2176 {
2177 SV *data_sv = av_pop (state);
2178 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2179
2180 errno = data->errorno;
2181 PL_laststype = data->laststype;
2182 PL_laststatval = data->laststatval;
2183 PL_statcache = data->statcache;
2184
2185 SvREFCNT_dec (data_sv);
2186 }
2187
2188 /* push result values */
2189 {
2190 dSP;
2191 int i;
2192
2193 EXTEND (SP, AvFILLp (state) + 1);
2194 for (i = 0; i <= AvFILLp (state); ++i)
2195 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2196
2197 PUTBACK;
2198 }
828 2199
829 return 0; 2200 return 0;
830} 2201}
831 2202
832static void 2203static void
833api_ready (SV *coro) 2204slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
834{ 2205{
835 coro_enq (SvREFCNT_inc (coro)); 2206 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
836} 2207 SV *coro_hv = SvRV (coro_current);
2208 struct coro *coro = SvSTATE_hv (coro_hv);
837 2209
838static void 2210 /* put our coroutine id on the state arg */
839api_schedule (int cede) 2211 av_push (state, SvREFCNT_inc_NN (coro_hv));
840{
841 SV *prev, *next;
842 2212
843 prev = GvSV (coro_current); 2213 /* first see whether we have a non-zero priority and set it as AIO prio */
2214 if (coro->prio)
2215 {
2216 dSP;
844 2217
845 if (cede) 2218 static SV *prio_cv;
846 coro_enq (SvREFCNT_inc (prev)); 2219 static SV *prio_sv;
847 2220
848 next = coro_deq (PRIO_MIN); 2221 if (expect_false (!prio_cv))
2222 {
2223 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2224 prio_sv = newSViv (0);
2225 }
849 2226
850 if (!next) 2227 PUSHMARK (SP);
851 next = SvREFCNT_inc (GvSV (coro_idle)); 2228 sv_setiv (prio_sv, coro->prio);
2229 XPUSHs (prio_sv);
852 2230
853 GvSV (coro_current) = SvREFCNT_inc (next); 2231 PUTBACK;
854 transfer (aTHX_ 2232 call_sv (prio_cv, G_VOID | G_DISCARD);
855 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 2233 }
856 sv_to_coro (next, "Coro::schedule", "next coroutine"),
857 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
858 SvREFCNT_dec (next);
859 SvREFCNT_dec (prev);
860}
861 2234
2235 /* now call the original request */
2236 {
2237 dSP;
2238 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2239 int i;
2240
2241 PUSHMARK (SP);
2242
2243 /* first push all args to the stack */
2244 EXTEND (SP, items + 1);
2245
2246 for (i = 0; i < items; ++i)
2247 PUSHs (arg [i]);
2248
2249 /* now push the callback closure */
2250 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2251
2252 /* now call the AIO function - we assume our request is uncancelable */
2253 PUTBACK;
2254 call_sv ((SV *)req, G_VOID | G_DISCARD);
2255 }
2256
2257 /* now that the requets is going, we loop toll we have a result */
2258 frame->data = (void *)state;
2259 frame->prepare = prepare_schedule;
2260 frame->check = slf_check_aio_req;
2261}
2262
2263static void
2264coro_aio_req_xs (pTHX_ CV *cv)
2265{
2266 dXSARGS;
2267
2268 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2269
2270 XSRETURN_EMPTY;
2271}
2272
2273/*****************************************************************************/
2274
862MODULE = Coro::State PACKAGE = Coro::State 2275MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
863 2276
864PROTOTYPES: ENABLE 2277PROTOTYPES: DISABLE
865 2278
866BOOT: 2279BOOT:
867{ /* {} necessary for stoopid perl-5.6.x */ 2280{
868 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2281#ifdef USE_ITHREADS
869 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2282# if CORO_PTHREAD
2283 coro_thx = PERL_GET_CONTEXT;
2284# endif
2285#endif
2286 BOOT_PAGESIZE;
2287
2288 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2289 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2290
2291 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2292 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2293 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2294
2295 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2296 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2297 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2298
870 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2299 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
871 2300
872 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2301 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
873 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2302 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
874 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2303 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
875 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2304 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
876
877 if (!padlist_cache)
878 padlist_cache = newHV ();
879 2305
880 main_mainstack = PL_mainstack; 2306 main_mainstack = PL_mainstack;
2307 main_top_env = PL_top_env;
881 2308
2309 while (main_top_env->je_prev)
2310 main_top_env = main_top_env->je_prev;
2311
2312 {
2313 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2314
2315 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2316 hv_store_ent (PL_custom_op_names, slf,
2317 newSVpv ("coro_slf", 0), 0);
2318
2319 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2320 hv_store_ent (PL_custom_op_descs, slf,
2321 newSVpv ("coro schedule like function", 0), 0);
2322 }
2323
882 coroapi.ver = CORO_API_VERSION; 2324 coroapi.ver = CORO_API_VERSION;
2325 coroapi.rev = CORO_API_REVISION;
2326
883 coroapi.transfer = api_transfer; 2327 coroapi.transfer = api_transfer;
884}
885 2328
886Coro::State 2329 coroapi.sv_state = SvSTATE_;
887_newprocess(args) 2330 coroapi.execute_slf = api_execute_slf;
888 SV * args 2331 coroapi.prepare_nop = prepare_nop;
889 PROTOTYPE: $ 2332 coroapi.prepare_schedule = prepare_schedule;
2333 coroapi.prepare_cede = prepare_cede;
2334 coroapi.prepare_cede_notself = prepare_cede_notself;
2335
2336 {
2337 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2338
2339 if (!svp) croak ("Time::HiRes is required");
2340 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2341
2342 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2343 }
2344
2345 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2346}
2347
2348SV *
2349new (char *klass, ...)
890 CODE: 2350 CODE:
891 Coro__State coro; 2351{
2352 struct coro *coro;
2353 MAGIC *mg;
2354 HV *hv;
2355 int i;
892 2356
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
894 croak ("Coro::State::_newprocess expects an arrayref");
895
896 New (0, coro, 1, struct coro); 2357 Newz (0, coro, 1, struct coro);
2358 coro->args = newAV ();
2359 coro->flags = CF_NEW;
897 2360
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2361 if (coro_first) coro_first->prev = coro;
899 coro->mainstack = 0; /* actual work is done inside transfer */ 2362 coro->next = coro_first;
900 coro->stack = 0; 2363 coro_first = coro;
901 2364
902 RETVAL = coro; 2365 coro->hv = hv = newHV ();
2366 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2367 mg->mg_flags |= MGf_DUP;
2368 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2369
2370 av_extend (coro->args, items - 1);
2371 for (i = 1; i < items; i++)
2372 av_push (coro->args, newSVsv (ST (i)));
2373}
903 OUTPUT: 2374 OUTPUT:
904 RETVAL 2375 RETVAL
905 2376
906void 2377void
907transfer(prev, next, flags) 2378transfer (...)
908 Coro::State_or_hashref prev
909 Coro::State_or_hashref next
910 int flags
911 PROTOTYPE: @ 2379 PROTOTYPE: $$
912 CODE: 2380 CODE:
913 PUTBACK; 2381 CORO_EXECUTE_SLF_XS (slf_init_transfer);
914 transfer (aTHX_ prev, next, flags); 2382
915 SPAGAIN; 2383bool
2384_destroy (SV *coro_sv)
2385 CODE:
2386 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2387 OUTPUT:
2388 RETVAL
916 2389
917void 2390void
918DESTROY(coro) 2391_exit (int code)
919 Coro::State coro 2392 PROTOTYPE: $
920 CODE: 2393 CODE:
2394 _exit (code);
921 2395
922 if (coro->mainstack && coro->mainstack != main_mainstack) 2396int
2397cctx_stacksize (int new_stacksize = 0)
2398 PROTOTYPE: ;$
2399 CODE:
2400 RETVAL = cctx_stacksize;
2401 if (new_stacksize)
2402 {
2403 cctx_stacksize = new_stacksize;
2404 ++cctx_gen;
2405 }
2406 OUTPUT:
2407 RETVAL
2408
2409int
2410cctx_max_idle (int max_idle = 0)
2411 PROTOTYPE: ;$
2412 CODE:
2413 RETVAL = cctx_max_idle;
2414 if (max_idle > 1)
2415 cctx_max_idle = max_idle;
2416 OUTPUT:
2417 RETVAL
2418
2419int
2420cctx_count ()
2421 PROTOTYPE:
2422 CODE:
2423 RETVAL = cctx_count;
2424 OUTPUT:
2425 RETVAL
2426
2427int
2428cctx_idle ()
2429 PROTOTYPE:
2430 CODE:
2431 RETVAL = cctx_idle;
2432 OUTPUT:
2433 RETVAL
2434
2435void
2436list ()
2437 PROTOTYPE:
2438 PPCODE:
2439{
2440 struct coro *coro;
2441 for (coro = coro_first; coro; coro = coro->next)
2442 if (coro->hv)
2443 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2444}
2445
2446void
2447call (Coro::State coro, SV *coderef)
2448 ALIAS:
2449 eval = 1
2450 CODE:
2451{
2452 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
923 { 2453 {
924 struct coro temp; 2454 struct coro temp;
925 2455
2456 if (!(coro->flags & CF_RUNNING))
2457 {
2458 PUTBACK;
2459 save_perl (aTHX_ &temp);
2460 load_perl (aTHX_ coro);
2461 }
2462
2463 {
2464 dSP;
2465 ENTER;
2466 SAVETMPS;
926 PUTBACK; 2467 PUTBACK;
927 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2468 PUSHSTACK;
928 LOAD(aTHX_ coro); 2469 PUSHMARK (SP);
2470
2471 if (ix)
2472 eval_sv (coderef, 0);
2473 else
2474 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2475
2476 POPSTACK;
929 SPAGAIN; 2477 SPAGAIN;
2478 FREETMPS;
2479 LEAVE;
2480 PUTBACK;
2481 }
930 2482
931 destroy_stacks (aTHX); 2483 if (!(coro->flags & CF_RUNNING))
932 2484 {
933 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2485 save_perl (aTHX_ coro);
2486 load_perl (aTHX_ &temp);
934 SPAGAIN; 2487 SPAGAIN;
935 2488 }
936 coro->mainstack = 0;
937 } 2489 }
2490}
938 2491
939 deallocate_stack (coro); 2492SV *
940 2493is_ready (Coro::State coro)
941 Safefree (coro); 2494 PROTOTYPE: $
2495 ALIAS:
2496 is_ready = CF_READY
2497 is_running = CF_RUNNING
2498 is_new = CF_NEW
2499 is_destroyed = CF_DESTROYED
2500 CODE:
2501 RETVAL = boolSV (coro->flags & ix);
2502 OUTPUT:
2503 RETVAL
942 2504
943void 2505void
944flush() 2506throw (Coro::State self, SV *throw = &PL_sv_undef)
945 CODE: 2507 PROTOTYPE: $;$
946#ifdef MAY_FLUSH 2508 CODE:
947 flush_padlist_cache (); 2509{
948#endif 2510 struct coro *current = SvSTATE_current;
2511 SV **throwp = self == current ? &coro_throw : &self->throw;
2512 SvREFCNT_dec (*throwp);
2513 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2514}
949 2515
950void 2516void
951_exit(code) 2517api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
952 int code 2518 PROTOTYPE: $;$
2519 C_ARGS: aTHX_ coro, flags
2520
2521SV *
2522has_cctx (Coro::State coro)
953 PROTOTYPE: $ 2523 PROTOTYPE: $
954 CODE: 2524 CODE:
955#if defined(__GLIBC__) || _POSIX_C_SOURCE 2525 RETVAL = boolSV (!!coro->cctx);
956 _exit (code); 2526 OUTPUT:
957#else 2527 RETVAL
958 signal (SIGTERM, SIG_DFL);
959 raise (SIGTERM);
960 exit (code);
961#endif
962 2528
963MODULE = Coro::State PACKAGE = Coro::Cont 2529int
2530is_traced (Coro::State coro)
2531 PROTOTYPE: $
2532 CODE:
2533 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2534 OUTPUT:
2535 RETVAL
964 2536
965# this is slightly dirty (should expose a c-level api) 2537UV
2538rss (Coro::State coro)
2539 PROTOTYPE: $
2540 ALIAS:
2541 usecount = 1
2542 CODE:
2543 switch (ix)
2544 {
2545 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2546 case 1: RETVAL = coro->usecount; break;
2547 }
2548 OUTPUT:
2549 RETVAL
966 2550
967void 2551void
968yield(...) 2552force_cctx ()
2553 PROTOTYPE:
2554 CODE:
2555 SvSTATE_current->cctx->idle_sp = 0;
2556
2557void
2558swap_defsv (Coro::State self)
969 PROTOTYPE: @ 2559 PROTOTYPE: $
2560 ALIAS:
2561 swap_defav = 1
970 CODE: 2562 CODE:
971 static SV *returnstk; 2563 if (!self->slot)
972 SV *sv; 2564 croak ("cannot swap state with coroutine that has no saved state,");
973 AV *defav = GvAV (PL_defgv); 2565 else
974 struct coro *prev, *next; 2566 {
2567 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2568 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
975 2569
976 if (!returnstk) 2570 SV *tmp = *src; *src = *dst; *dst = tmp;
977 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2571 }
978 2572
979 /* set up @_ -- ugly */
980 av_clear (defav);
981 av_fill (defav, items - 1);
982 while (items--)
983 av_store (defav, items, SvREFCNT_inc (ST(items)));
984
985 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
986 sv = av_pop ((AV *)SvRV (returnstk));
987 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
988 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
989 SvREFCNT_dec (sv);
990
991 transfer(aTHX_ prev, next, 0);
992 2573
993MODULE = Coro::State PACKAGE = Coro 2574MODULE = Coro::State PACKAGE = Coro
994 2575
995# this is slightly dirty (should expose a c-level api)
996
997BOOT: 2576BOOT:
998{ 2577{
999 int i; 2578 int i;
2579
2580 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2581 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2582 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2583
2584 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2585 SvREADONLY_on (coro_current);
2586
1000 HV *stash = gv_stashpv ("Coro", TRUE); 2587 coro_stash = gv_stashpv ("Coro", TRUE);
1001 2588
1002 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2589 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1003 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2590 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1004 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2591 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1005 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2592 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1006 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2593 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1007 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2594 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1008
1009 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1010 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1011 2595
1012 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2596 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1013 coro_ready[i] = newAV (); 2597 coro_ready[i] = newAV ();
1014 2598
1015 { 2599 {
1016 SV *sv = perl_get_sv("Coro::API", 1); 2600 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1017 2601
1018 coroapi.schedule = api_schedule; 2602 coroapi.schedule = api_schedule;
2603 coroapi.cede = api_cede;
2604 coroapi.cede_notself = api_cede_notself;
1019 coroapi.ready = api_ready; 2605 coroapi.ready = api_ready;
2606 coroapi.is_ready = api_is_ready;
1020 coroapi.nready = &coro_nready; 2607 coroapi.nready = coro_nready;
1021 coroapi.current = coro_current; 2608 coroapi.current = coro_current;
1022 2609
1023 GCoroAPI = &coroapi; 2610 GCoroAPI = &coroapi;
1024 sv_setiv(sv, (IV)&coroapi); 2611 sv_setiv (sv, (IV)&coroapi);
1025 SvREADONLY_on(sv); 2612 SvREADONLY_on (sv);
1026 } 2613 }
1027} 2614}
1028 2615
1029void 2616void
1030ready(self) 2617schedule (...)
1031 SV * self
1032 CODE: 2618 CODE:
1033 api_ready (self); 2619 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2620
2621void
2622cede (...)
2623 CODE:
2624 CORO_EXECUTE_SLF_XS (slf_init_cede);
2625
2626void
2627cede_notself (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2630
2631void
2632_set_current (SV *current)
2633 PROTOTYPE: $
2634 CODE:
2635 SvREFCNT_dec (SvRV (coro_current));
2636 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2637
2638void
2639_set_readyhook (SV *hook)
2640 PROTOTYPE: $
2641 CODE:
2642 SvREFCNT_dec (coro_readyhook);
2643 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1034 2644
1035int 2645int
2646prio (Coro::State coro, int newprio = 0)
2647 PROTOTYPE: $;$
2648 ALIAS:
2649 nice = 1
2650 CODE:
2651{
2652 RETVAL = coro->prio;
2653
2654 if (items > 1)
2655 {
2656 if (ix)
2657 newprio = coro->prio - newprio;
2658
2659 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2660 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2661
2662 coro->prio = newprio;
2663 }
2664}
2665 OUTPUT:
2666 RETVAL
2667
2668SV *
2669ready (SV *self)
2670 PROTOTYPE: $
2671 CODE:
2672 RETVAL = boolSV (api_ready (aTHX_ self));
2673 OUTPUT:
2674 RETVAL
2675
2676int
1036nready(...) 2677nready (...)
1037 PROTOTYPE: 2678 PROTOTYPE:
1038 CODE: 2679 CODE:
1039 RETVAL = coro_nready; 2680 RETVAL = coro_nready;
1040 OUTPUT: 2681 OUTPUT:
1041 RETVAL 2682 RETVAL
1042 2683
2684# for async_pool speedup
1043void 2685void
1044schedule(...) 2686_pool_1 (SV *cb)
1045 PROTOTYPE:
1046 ALIAS:
1047 cede = 1
1048 CODE: 2687 CODE:
1049 api_schedule (ix); 2688{
2689 HV *hv = (HV *)SvRV (coro_current);
2690 struct coro *coro = SvSTATE_hv ((SV *)hv);
2691 AV *defav = GvAV (PL_defgv);
2692 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2693 AV *invoke_av;
2694 int i, len;
1050 2695
2696 if (!invoke)
2697 {
2698 SV *old = PL_diehook;
2699 PL_diehook = 0;
2700 SvREFCNT_dec (old);
2701 croak ("\3async_pool terminate\2\n");
2702 }
2703
2704 SvREFCNT_dec (coro->saved_deffh);
2705 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2706
2707 hv_store (hv, "desc", sizeof ("desc") - 1,
2708 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2709
2710 invoke_av = (AV *)SvRV (invoke);
2711 len = av_len (invoke_av);
2712
2713 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2714
2715 if (len > 0)
2716 {
2717 av_fill (defav, len - 1);
2718 for (i = 0; i < len; ++i)
2719 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2720 }
2721}
2722
2723void
2724_pool_2 (SV *cb)
2725 CODE:
2726{
2727 HV *hv = (HV *)SvRV (coro_current);
2728 struct coro *coro = SvSTATE_hv ((SV *)hv);
2729
2730 sv_setsv (cb, &PL_sv_undef);
2731
2732 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2733 coro->saved_deffh = 0;
2734
2735 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2736 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2737 {
2738 SV *old = PL_diehook;
2739 PL_diehook = 0;
2740 SvREFCNT_dec (old);
2741 croak ("\3async_pool terminate\2\n");
2742 }
2743
2744 av_clear (GvAV (PL_defgv));
2745 hv_store (hv, "desc", sizeof ("desc") - 1,
2746 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2747
2748 coro->prio = 0;
2749
2750 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2751 api_trace (aTHX_ coro_current, 0);
2752
2753 av_push (av_async_pool, newSVsv (coro_current));
2754}
2755
2756
2757MODULE = Coro::State PACKAGE = PerlIO::cede
2758
2759BOOT:
2760 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2761
2762
2763MODULE = Coro::State PACKAGE = Coro::Semaphore
2764
2765SV *
2766new (SV *klass, SV *count_ = 0)
2767 CODE:
2768{
2769 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2770 AV *av = newAV ();
2771 SV **ary;
2772
2773 /* unfortunately, building manually saves memory */
2774 Newx (ary, 2, SV *);
2775 AvALLOC (av) = ary;
2776 AvARRAY (av) = ary;
2777 AvMAX (av) = 1;
2778 AvFILLp (av) = 0;
2779 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2780
2781 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2782}
2783 OUTPUT:
2784 RETVAL
2785
2786SV *
2787count (SV *self)
2788 CODE:
2789 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2790 OUTPUT:
2791 RETVAL
2792
2793void
2794up (SV *self, int adjust = 1)
2795 ALIAS:
2796 adjust = 1
2797 CODE:
2798 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2799
2800void
2801down (SV *self)
2802 CODE:
2803 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2804
2805void
2806try (SV *self)
2807 PPCODE:
2808{
2809 AV *av = (AV *)SvRV (self);
2810 SV *count_sv = AvARRAY (av)[0];
2811 IV count = SvIVX (count_sv);
2812
2813 if (count > 0)
2814 {
2815 --count;
2816 SvIVX (count_sv) = count;
2817 XSRETURN_YES;
2818 }
2819 else
2820 XSRETURN_NO;
2821}
2822
2823void
2824waiters (SV *self)
2825 CODE:
2826{
2827 AV *av = (AV *)SvRV (self);
2828
2829 if (GIMME_V == G_SCALAR)
2830 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2831 else
2832 {
2833 int i;
2834 EXTEND (SP, AvFILLp (av) + 1 - 1);
2835 for (i = 1; i <= AvFILLp (av); ++i)
2836 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2837 }
2838}
2839
2840
2841MODULE = Coro::State PACKAGE = Coro::AnyEvent
2842
2843BOOT:
2844 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2845
2846void
2847_schedule (...)
2848 CODE:
2849{
2850 static int incede;
2851
2852 api_cede_notself (aTHX);
2853
2854 ++incede;
2855 while (coro_nready >= incede && api_cede (aTHX))
2856 ;
2857
2858 sv_setsv (sv_activity, &PL_sv_undef);
2859 if (coro_nready >= incede)
2860 {
2861 PUSHMARK (SP);
2862 PUTBACK;
2863 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2864 }
2865
2866 --incede;
2867}
2868
2869
2870MODULE = Coro::State PACKAGE = Coro::AIO
2871
2872void
2873_register (char *target, char *proto, SV *req)
2874 CODE:
2875{
2876 HV *st;
2877 GV *gvp;
2878 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2879 /* newXSproto doesn't return the CV on 5.8 */
2880 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2881 sv_setpv ((SV *)slf_cv, proto);
2882 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2883}
2884

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