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Comparing Coro/Coro/State.xs (file contents):
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC vs.
Revision 1.326 by root, Mon Nov 24 04:56:38 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (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#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
30 137
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 139
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
34 154
35#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
36 157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
161# endif
162#endif
163
164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
171static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
175static HV *coro_state_stash, *coro_stash;
176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 177
39/* this is actually not only the c stack but also c registers etc... */ 178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
40typedef struct { 213typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 214{
42 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
45 coro_context cctx; 225 coro_context cctx;
46 226
47 void *sptr; 227 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
49} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
50 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243};
244
245/* the structure where most of the perl state is stored, overlaid on the cxstack */
246typedef struct
247{
248 SV *defsv;
249 AV *defav;
250 SV *errsv;
251 SV *irsgv;
252#define VAR(name,type) type name;
253# include "state.h"
254#undef VAR
255} perl_slots;
256
257#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
258
259/* this is a structure representing a perl-level coroutine */
51struct coro { 260struct coro {
52 /* the optional C context */ 261 /* the C coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 262 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 263
57 /* optionally saved, might be zero */ 264 /* state data */
58 AV *defav; 265 struct CoroSLF slf_frame; /* saved slf frame */
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65
66 /* the stacks and related info (callchain etc..) */
67 PERL_SI *curstackinfo;
68 AV *curstack;
69 AV *mainstack; 266 AV *mainstack;
70 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 268
269 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 270 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 271 int refcnt; /* coroutines are refcounted, yes */
272 int flags; /* CF_ flags */
273 HV *hv; /* the perl hash associated with this coro, if any */
274 void (*on_destroy)(pTHX_ struct coro *coro);
275
276 /* statistics */
277 int usecount; /* number of transfers to this coro */
278
279 /* coro process data */
280 int prio;
281 SV *except; /* exception to be thrown */
282 SV *rouse_cb;
283
284 /* async_pool */
285 SV *saved_deffh;
286 SV *invoke_cb;
287 AV *invoke_av;
288
289 /* linked list */
290 struct coro *next, *prev;
96}; 291};
97 292
98typedef struct coro *Coro__State; 293typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 294typedef struct coro *Coro__State_or_hashref;
100 295
101static AV *main_mainstack; /* used to differentiate between $main and others */ 296/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 297/* and get copied between struct coro and these variables */
103static SV *ucoro_state_sv; 298/* the mainr easonw e don't support windows process emulation */
104static U32 ucoro_state_hash; 299static struct CoroSLF slf_frame; /* the current slf frame */
105static HV *padlist_cache;
106static SV *coro_mortal; /* will be freed after next transfer */
107
108/* mostly copied from op.c:cv_clone2 */
109STATIC AV *
110clone_padlist (AV *protopadlist)
111{
112 AV *av;
113 I32 ix;
114 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
115 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
116 SV **pname = AvARRAY (protopad_name);
117 SV **ppad = AvARRAY (protopad);
118 I32 fname = AvFILLp (protopad_name);
119 I32 fpad = AvFILLp (protopad);
120 AV *newpadlist, *newpad_name, *newpad;
121 SV **npad;
122
123 newpad_name = newAV ();
124 for (ix = fname; ix >= 0; ix--)
125 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127 newpad = newAV ();
128 av_fill (newpad, AvFILLp (protopad));
129 npad = AvARRAY (newpad);
130
131 newpadlist = newAV ();
132 AvREAL_off (newpadlist);
133 av_store (newpadlist, 0, (SV *) newpad_name);
134 av_store (newpadlist, 1, (SV *) newpad);
135
136 av = newAV (); /* will be @_ */
137 av_extend (av, 0);
138 av_store (newpad, 0, (SV *) av);
139 AvFLAGS (av) = AVf_REIFY;
140
141 for (ix = fpad; ix > 0; ix--)
142 {
143 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
144 if (namesv && namesv != &PL_sv_undef)
145 {
146 char *name = SvPVX (namesv); /* XXX */
147 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
148 { /* lexical from outside? */
149 npad[ix] = SvREFCNT_inc (ppad[ix]);
150 }
151 else
152 { /* our own lexical */
153 SV *sv;
154 if (*name == '&')
155 sv = SvREFCNT_inc (ppad[ix]);
156 else if (*name == '@')
157 sv = (SV *) newAV ();
158 else if (*name == '%')
159 sv = (SV *) newHV ();
160 else
161 sv = NEWSV (0, 0);
162 if (!SvPADBUSY (sv))
163 SvPADMY_on (sv);
164 npad[ix] = sv;
165 }
166 }
167 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
168 {
169 npad[ix] = SvREFCNT_inc (ppad[ix]);
170 }
171 else
172 {
173 SV *sv = NEWSV (0, 0);
174 SvPADTMP_on (sv);
175 npad[ix] = sv;
176 }
177 }
178
179#if 0 /* return -ENOTUNDERSTOOD */
180 /* Now that vars are all in place, clone nested closures. */
181
182 for (ix = fpad; ix > 0; ix--) {
183 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
184 if (namesv
185 && namesv != &PL_sv_undef
186 && !(SvFLAGS(namesv) & SVf_FAKE)
187 && *SvPVX(namesv) == '&'
188 && CvCLONE(ppad[ix]))
189 {
190 CV *kid = cv_clone((CV*)ppad[ix]);
191 SvREFCNT_dec(ppad[ix]);
192 CvCLONE_on(kid);
193 SvPADMY_on(kid);
194 npad[ix] = (SV*)kid;
195 }
196 }
197#endif
198
199 return newpadlist;
200}
201
202#ifdef MAY_FLUSH
203STATIC void
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT(padlist))
208 {
209 I32 i = AvFILLp(padlist);
210 while (i >= 0)
211 {
212 SV **svp = av_fetch(padlist, i--, FALSE);
213 SV *sv = svp ? *svp : Nullsv;
214 if (sv)
215 SvREFCNT_dec(sv);
216 }
217
218 SvREFCNT_dec((SV*)padlist);
219 }
220}
221#endif
222
223/* the next two functions merely cache the padlists */
224STATIC void
225get_padlist (CV *cv)
226{
227 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
228
229 if (he && AvFILLp ((AV *)*he) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
231 else
232 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233}
234
235STATIC void
236put_padlist (CV *cv)
237{
238 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
239
240 if (SvTYPE (*he) != SVt_PVAV)
241 {
242 SvREFCNT_dec (*he);
243 *he = (SV *)newAV ();
244 }
245
246 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
247}
248
249#ifdef MAY_FLUSH
250STATIC void
251flush_padlist_cache ()
252{
253 HV *hv = padlist_cache;
254 padlist_cache = newHV ();
255
256 if (hv_iterinit (hv))
257 {
258 HE *he;
259 AV *padlist;
260
261 while (!!(he = hv_iternext (hv)))
262 {
263 AV *av = (AV *)HeVAL(he);
264
265 /* casting is fun. */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267 free_padlist (padlist);
268 }
269 }
270
271 SvREFCNT_dec (hv);
272}
273#endif
274
275#define SB do {
276#define SE } while (0)
277
278#define LOAD(state) load_state(aTHX_ (state));
279#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
282
283static void
284load_state(pTHX_ Coro__State c)
285{
286 PL_dowarn = c->dowarn;
287 PL_in_eval = c->in_eval;
288
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_top_env = c->top_env;
315
316 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
317 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
318 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
319
320 {
321 dSP;
322 CV *cv;
323
324 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs))
326 {
327 AV *padlist = (AV *)POPs;
328
329 if (padlist)
330 {
331 put_padlist (cv); /* mark this padlist as available */
332 CvPADLIST(cv) = padlist;
333#ifdef USE_THREADS
334 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
335#endif
336 }
337
338 ++CvDEPTH(cv);
339 }
340
341 PUTBACK;
342 }
343}
344
345static void
346save_state(pTHX_ Coro__State c, int flags)
347{
348 {
349 dSP;
350 I32 cxix = cxstack_ix;
351 PERL_CONTEXT *ccstk = cxstack;
352 PERL_SI *top_si = PL_curstackinfo;
353
354 /*
355 * the worst thing you can imagine happens first - we have to save
356 * (and reinitialize) all cv's in the whole callchain :(
357 */
358
359 PUSHs (Nullsv);
360 /* this loop was inspired by pp_caller */
361 for (;;)
362 {
363 while (cxix >= 0)
364 {
365 PERL_CONTEXT *cx = &ccstk[cxix--];
366
367 if (CxTYPE(cx) == CXt_SUB)
368 {
369 CV *cv = cx->blk_sub.cv;
370 if (CvDEPTH(cv))
371 {
372#ifdef USE_THREADS
373 /*XPUSHs ((SV *)CvOWNER(cv));*/
374 /*CvOWNER(cv) = 0;*/
375 /*error must unlock this cv etc.. etc...*/
376#endif
377 EXTEND (SP, CvDEPTH(cv)*2);
378
379 while (--CvDEPTH(cv))
380 {
381 /* this tells the restore code to increment CvDEPTH */
382 PUSHs (Nullsv);
383 PUSHs ((SV *)cv);
384 }
385
386 PUSHs ((SV *)CvPADLIST(cv));
387 PUSHs ((SV *)cv);
388
389 get_padlist (cv); /* this is a monster */
390 }
391 }
392 else if (CxTYPE(cx) == CXt_FORMAT)
393 {
394 /* I never used formats, so how should I know how these are implemented? */
395 /* my bold guess is as a simple, plain sub... */
396 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397 }
398 }
399
400 if (top_si->si_type == PERLSI_MAIN)
401 break;
402
403 top_si = top_si->si_prev;
404 ccstk = top_si->si_cxstack;
405 cxix = top_si->si_cxix;
406 }
407
408 PUTBACK;
409 }
410
411 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
413 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
414
415 c->dowarn = PL_dowarn;
416 c->in_eval = PL_in_eval;
417
418 c->curstackinfo = PL_curstackinfo;
419 c->curstack = PL_curstack;
420 c->mainstack = PL_mainstack;
421 c->stack_sp = PL_stack_sp;
422 c->op = PL_op;
423 c->curpad = PL_curpad;
424 c->stack_base = PL_stack_base;
425 c->stack_max = PL_stack_max;
426 c->tmps_stack = PL_tmps_stack;
427 c->tmps_floor = PL_tmps_floor;
428 c->tmps_ix = PL_tmps_ix;
429 c->tmps_max = PL_tmps_max;
430 c->markstack = PL_markstack;
431 c->markstack_ptr = PL_markstack_ptr;
432 c->markstack_max = PL_markstack_max;
433 c->scopestack = PL_scopestack;
434 c->scopestack_ix = PL_scopestack_ix;
435 c->scopestack_max = PL_scopestack_max;
436 c->savestack = PL_savestack;
437 c->savestack_ix = PL_savestack_ix;
438 c->savestack_max = PL_savestack_max;
439 c->retstack = PL_retstack;
440 c->retstack_ix = PL_retstack_ix;
441 c->retstack_max = PL_retstack_max;
442 c->curcop = PL_curcop;
443 c->top_env = PL_top_env;
444}
445
446/*
447 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory
449 * on the assumption that coroutines do not usually need
450 * a lot of stackspace.
451 */
452STATIC void
453coro_init_stacks (pTHX)
454{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
456 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459
460 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463
464 New(50,PL_tmps_stack,96,SV*);
465 PL_tmps_floor = -1;
466 PL_tmps_ix = -1;
467 PL_tmps_max = 96;
468
469 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16;
472
473 SET_MARK_OFFSET;
474
475 New(54,PL_scopestack,16,I32);
476 PL_scopestack_ix = 0;
477 PL_scopestack_max = 16;
478
479 New(54,PL_savestack,96,ANY);
480 PL_savestack_ix = 0;
481 PL_savestack_max = 96;
482
483 New(54,PL_retstack,8,OP*);
484 PL_retstack_ix = 0;
485 PL_retstack_max = 8;
486}
487
488/*
489 * destroy the stacks, the callchain etc...
490 * still there is a memleak of 128 bytes...
491 */
492STATIC void
493destroy_stacks(pTHX)
494{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 while (PL_scopestack_ix)
499 LEAVE;
500
501 /* sure it is, but more important: is it correct?? :/ */
502 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503 FREETMPS;
504 }
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT)
520 {
521 dounwind(-1);
522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 }
524
525 Safefree(PL_curstackinfo->si_cxstack);
526 Safefree(PL_curstackinfo);
527 PL_curstackinfo = p;
528 }
529
530 Safefree(PL_tmps_stack);
531 Safefree(PL_markstack);
532 Safefree(PL_scopestack);
533 Safefree(PL_savestack);
534 Safefree(PL_retstack);
535}
536
537static void
538allocate_stack (Coro__State ctx, int alloc)
539{
540 coro_stack *stack;
541
542 New (0, stack, 1, coro_stack);
543
544 stack->refcnt = 1;
545 stack->usecnt = 1;
546 stack->gencnt = ctx->gencnt = 0;
547 if (alloc)
548 {
549#if HAVE_MMAP
550 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552 if (stack->sptr == (void *)-1)
553#endif
554 {
555 /*FIXME*//*D*//* reasonable stack size! */
556 stack->ssize = -4096 * sizeof (long);
557 New (0, stack->sptr, 4096, long);
558 }
559 }
560 else
561 stack->sptr = 0;
562
563 ctx->stack = stack;
564}
565
566static void
567deallocate_stack (Coro__State ctx)
568{
569 coro_stack *stack = ctx->stack;
570
571 ctx->stack = 0;
572
573 if (stack)
574 {
575 if (!--stack->refcnt)
576 {
577#ifdef HAVE_MMAP
578 if (stack->ssize > 0 && stack->sptr)
579 munmap (stack->sptr, stack->ssize);
580 else
581#else
582 Safefree (stack->sptr);
583#endif
584 Safefree (stack);
585 }
586 else if (ctx->gencnt == stack->gencnt)
587 --stack->usecnt;
588 }
589}
590
591static void
592setup_coro (void *arg)
593{
594 /*
595 * emulate part of the perl startup here.
596 */
597 dSP;
598 Coro__State ctx = (Coro__State)arg;
599 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
600
601 coro_init_stacks (aTHX);
602 /*PL_curcop = 0;*/
603 /*PL_in_eval = PL_in_eval;*/ /* inherit */
604 SvREFCNT_dec (GvAV (PL_defgv));
605 GvAV (PL_defgv) = ctx->args;
606
607 SPAGAIN;
608
609 if (ctx->stack)
610 {
611 ctx->cursp = 0;
612
613 PUSHMARK(SP);
614 PUTBACK;
615 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
616
617 if (SvTRUE (ERRSV))
618 croak (NULL);
619 else
620 croak ("FATAL: CCTXT coroutine returned!");
621 }
622 else
623 {
624 UNOP myop;
625
626 PL_op = (OP *)&myop;
627
628 Zero(&myop, 1, UNOP);
629 myop.op_next = Nullop;
630 myop.op_flags = OPf_WANT_VOID;
631
632 PUSHMARK(SP);
633 XPUSHs (sub_init);
634 /*
635 * the next line is slightly wrong, as PL_op->op_next
636 * is actually being executed so we skip the first op.
637 * that doesn't matter, though, since it is only
638 * pp_nextstate and we never return...
639 * ah yes, and I don't care anyways ;)
640 */
641 PUTBACK;
642 PL_op = PL_ppaddr[OP_ENTERSUB]();
643 SPAGAIN;
644
645 ENTER; /* necessary e.g. for dounwind */
646 }
647}
648
649static void
650continue_coro (void *arg)
651{
652 /*
653 * this is a _very_ stripped down perl interpreter ;)
654 */
655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
657
658 /* same as JMPENV_BOOTSTRAP */
659 Zero(&coro_start_env, 1, JMPENV);
660 coro_start_env.je_ret = -1;
661 coro_start_env.je_mustcatch = TRUE;
662 PL_top_env = &coro_start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671STATIC void
672transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675 static struct coro *xnext;
676
677 if (prev != next)
678 {
679 xnext = next;
680
681 if (next->mainstack)
682 {
683 SAVE (prev, flags);
684 LOAD (next);
685
686 /* mark this state as in-use */
687 next->mainstack = 0;
688 next->tmps_ix = -2;
689
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 {
693 if (!prev->stack)
694 allocate_stack (prev, 0);
695 else if (prev->cursp != stacklevel
696 && prev->stack->usecnt > 1)
697 {
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
714 }
715
716 }
717 else if (next->tmps_ix == -2)
718 croak ("tried to transfer to running coroutine");
719 else
720 {
721 SAVE (prev, -1); /* first get rid of the old state */
722
723 if (flags & TRANSFER_SAVE_CCTXT)
724 {
725 if (!prev->stack)
726 allocate_stack (prev, 0);
727
728 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729 {
730 setup_coro (next);
731
732 prev->stack->refcnt++;
733 prev->stack->usecnt++;
734 next->stack = prev->stack;
735 next->gencnt = prev->gencnt;
736 }
737 else
738 {
739 allocate_stack (next, 1);
740 coro_create (&(next->stack->cctx),
741 setup_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
745 }
746 }
747 else
748 setup_coro (next);
749 }
750
751 /*
752 * xnext is now either prev or next, depending on wether
753 * we switched the c stack or not. that's why I use a global
754 * variable, that should become thread-specific at one point.
755 */
756 xnext->cursp = stacklevel;
757 }
758
759 if (coro_mortal)
760 {
761 SvREFCNT_dec (coro_mortal);
762 coro_mortal = 0;
763 }
764}
765
766#define SV_CORO(sv,func) \
767 do { \
768 if (SvROK (sv)) \
769 sv = SvRV (sv); \
770 \
771 if (SvTYPE(sv) == SVt_PVHV) \
772 { \
773 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
774 \
775 if (!he) \
776 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
777 \
778 (sv) = SvRV (HeVAL(he)); \
779 } \
780 \
781 /* must also be changed inside Coro::Cont::yield */ \
782 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
783 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
784 \
785 } while(0)
786
787#define SvSTATE(sv) (struct coro *)SvIV (sv)
788
789static void
790api_transfer(pTHX_ SV *prev, SV *next, int flags)
791{
792 SV_CORO (prev, "Coro::transfer");
793 SV_CORO (next, "Coro::transfer");
794
795 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
796}
797 300
798/** Coro ********************************************************************/ 301/** Coro ********************************************************************/
799 302
800#define PRIO_MAX 3 303#define PRIO_MAX 3
801#define PRIO_HIGH 1 304#define PRIO_HIGH 1
… …
803#define PRIO_LOW -1 306#define PRIO_LOW -1
804#define PRIO_IDLE -3 307#define PRIO_IDLE -3
805#define PRIO_MIN -4 308#define PRIO_MIN -4
806 309
807/* for Coro.pm */ 310/* for Coro.pm */
808static GV *coro_current, *coro_idle; 311static SV *coro_current;
312static SV *coro_readyhook;
809static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 313static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
810static int coro_nready; 314static CV *cv_coro_run, *cv_coro_terminate;
315static struct coro *coro_first;
316#define coro_nready coroapi.nready
811 317
812static void 318/** lowlevel stuff **********************************************************/
813coro_enq (SV *sv)
814{
815 if (SvTYPE (sv) == SVt_PVHV)
816 {
817 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
818 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
819
820 prio = prio > PRIO_MAX ? PRIO_MAX
821 : prio < PRIO_MIN ? PRIO_MIN
822 : prio;
823
824 av_push (coro_ready [prio - PRIO_MIN], sv);
825 coro_nready++;
826
827 return;
828 }
829
830 croak ("Coro::ready tried to enqueue something that is not a coroutine");
831}
832 319
833static SV * 320static SV *
834coro_deq (int min_prio) 321coro_get_sv (pTHX_ const char *name, int create)
835{ 322{
836 int prio = PRIO_MAX - PRIO_MIN; 323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_sv (name, create);
326#endif
327 return get_sv (name, create);
328}
837 329
838 min_prio -= PRIO_MIN; 330static AV *
839 if (min_prio < 0) 331coro_get_av (pTHX_ const char *name, int create)
840 min_prio = 0; 332{
333#if PERL_VERSION_ATLEAST (5,10,0)
334 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
335 get_av (name, create);
336#endif
337 return get_av (name, create);
338}
841 339
842 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 340static HV *
843 if (av_len (coro_ready[prio]) >= 0) 341coro_get_hv (pTHX_ const char *name, int create)
342{
343#if PERL_VERSION_ATLEAST (5,10,0)
344 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
345 get_hv (name, create);
346#endif
347 return get_hv (name, create);
348}
349
350/* may croak */
351INLINE CV *
352coro_sv_2cv (pTHX_ SV *sv)
353{
354 HV *st;
355 GV *gvp;
356 return sv_2cv (sv, &st, &gvp, 0);
357}
358
359static AV *
360coro_derive_padlist (pTHX_ CV *cv)
361{
362 AV *padlist = CvPADLIST (cv);
363 AV *newpadlist, *newpad;
364
365 newpadlist = newAV ();
366 AvREAL_off (newpadlist);
367#if PERL_VERSION_ATLEAST (5,10,0)
368 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
369#else
370 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
371#endif
372 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
373 --AvFILLp (padlist);
374
375 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
376 av_store (newpadlist, 1, (SV *)newpad);
377
378 return newpadlist;
379}
380
381static void
382free_padlist (pTHX_ AV *padlist)
383{
384 /* may be during global destruction */
385 if (SvREFCNT (padlist))
386 {
387 I32 i = AvFILLp (padlist);
388 while (i >= 0)
844 { 389 {
845 coro_nready--; 390 SV **svp = av_fetch (padlist, i--, FALSE);
846 return av_shift (coro_ready[prio]); 391 if (svp)
392 {
393 SV *sv;
394 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
395 SvREFCNT_dec (sv);
396
397 SvREFCNT_dec (*svp);
398 }
847 } 399 }
400
401 SvREFCNT_dec ((SV*)padlist);
402 }
403}
404
405static int
406coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
407{
408 AV *padlist;
409 AV *av = (AV *)mg->mg_obj;
410
411 /* casting is fun. */
412 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
413 free_padlist (aTHX_ padlist);
414
415 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
848 416
849 return 0; 417 return 0;
850} 418}
851 419
852static void 420#define CORO_MAGIC_type_cv 26
853api_ready (SV *coro) 421#define CORO_MAGIC_type_state PERL_MAGIC_ext
422
423static MGVTBL coro_cv_vtbl = {
424 0, 0, 0, 0,
425 coro_cv_free
426};
427
428#define CORO_MAGIC_NN(sv, type) \
429 (expect_true (SvMAGIC (sv)->mg_type == type) \
430 ? SvMAGIC (sv) \
431 : mg_find (sv, type))
432
433#define CORO_MAGIC(sv, type) \
434 (expect_true (SvMAGIC (sv)) \
435 ? CORO_MAGIC_NN (sv, type) \
436 : 0)
437
438#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
439#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
440
441INLINE struct coro *
442SvSTATE_ (pTHX_ SV *coro)
854{ 443{
444 HV *stash;
445 MAGIC *mg;
446
855 if (SvROK (coro)) 447 if (SvROK (coro))
856 coro = SvRV (coro); 448 coro = SvRV (coro);
857 449
858 coro_enq (SvREFCNT_inc (coro)); 450 if (expect_false (SvTYPE (coro) != SVt_PVHV))
859} 451 croak ("Coro::State object required");
860 452
453 stash = SvSTASH (coro);
454 if (expect_false (stash != coro_stash && stash != coro_state_stash))
455 {
456 /* very slow, but rare, check */
457 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
458 croak ("Coro::State object required");
459 }
460
461 mg = CORO_MAGIC_state (coro);
462 return (struct coro *)mg->mg_ptr;
463}
464
465#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
466
467/* faster than SvSTATE, but expects a coroutine hv */
468#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
469#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
470
471/* the next two functions merely cache the padlists */
472static void
473get_padlist (pTHX_ CV *cv)
474{
475 MAGIC *mg = CORO_MAGIC_cv (cv);
476 AV *av;
477
478 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
479 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
480 else
481 {
482#if CORO_PREFER_PERL_FUNCTIONS
483 /* this is probably cleaner? but also slower! */
484 /* in practise, it seems to be less stable */
485 CV *cp = Perl_cv_clone (aTHX_ cv);
486 CvPADLIST (cv) = CvPADLIST (cp);
487 CvPADLIST (cp) = 0;
488 SvREFCNT_dec (cp);
489#else
490 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
491#endif
492 }
493}
494
495static void
496put_padlist (pTHX_ CV *cv)
497{
498 MAGIC *mg = CORO_MAGIC_cv (cv);
499 AV *av;
500
501 if (expect_false (!mg))
502 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
503
504 av = (AV *)mg->mg_obj;
505
506 if (expect_false (AvFILLp (av) >= AvMAX (av)))
507 av_extend (av, AvMAX (av) + 1);
508
509 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
510}
511
512/** load & save, init *******************************************************/
513
514static void
515load_perl (pTHX_ Coro__State c)
516{
517 perl_slots *slot = c->slot;
518 c->slot = 0;
519
520 PL_mainstack = c->mainstack;
521
522 GvSV (PL_defgv) = slot->defsv;
523 GvAV (PL_defgv) = slot->defav;
524 GvSV (PL_errgv) = slot->errsv;
525 GvSV (irsgv) = slot->irsgv;
526
527 #define VAR(name,type) PL_ ## name = slot->name;
528 # include "state.h"
529 #undef VAR
530
531 {
532 dSP;
533
534 CV *cv;
535
536 /* now do the ugly restore mess */
537 while (expect_true (cv = (CV *)POPs))
538 {
539 put_padlist (aTHX_ cv); /* mark this padlist as available */
540 CvDEPTH (cv) = PTR2IV (POPs);
541 CvPADLIST (cv) = (AV *)POPs;
542 }
543
544 PUTBACK;
545 }
546
547 slf_frame = c->slf_frame;
548 CORO_THROW = c->except;
549}
550
551static void
552save_perl (pTHX_ Coro__State c)
553{
554 c->except = CORO_THROW;
555 c->slf_frame = slf_frame;
556
557 {
558 dSP;
559 I32 cxix = cxstack_ix;
560 PERL_CONTEXT *ccstk = cxstack;
561 PERL_SI *top_si = PL_curstackinfo;
562
563 /*
564 * the worst thing you can imagine happens first - we have to save
565 * (and reinitialize) all cv's in the whole callchain :(
566 */
567
568 XPUSHs (Nullsv);
569 /* this loop was inspired by pp_caller */
570 for (;;)
571 {
572 while (expect_true (cxix >= 0))
573 {
574 PERL_CONTEXT *cx = &ccstk[cxix--];
575
576 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
577 {
578 CV *cv = cx->blk_sub.cv;
579
580 if (expect_true (CvDEPTH (cv)))
581 {
582 EXTEND (SP, 3);
583 PUSHs ((SV *)CvPADLIST (cv));
584 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
585 PUSHs ((SV *)cv);
586
587 CvDEPTH (cv) = 0;
588 get_padlist (aTHX_ cv);
589 }
590 }
591 }
592
593 if (expect_true (top_si->si_type == PERLSI_MAIN))
594 break;
595
596 top_si = top_si->si_prev;
597 ccstk = top_si->si_cxstack;
598 cxix = top_si->si_cxix;
599 }
600
601 PUTBACK;
602 }
603
604 /* allocate some space on the context stack for our purposes */
605 /* we manually unroll here, as usually 2 slots is enough */
606 if (SLOT_COUNT >= 1) CXINC;
607 if (SLOT_COUNT >= 2) CXINC;
608 if (SLOT_COUNT >= 3) CXINC;
609 {
610 int i;
611 for (i = 3; i < SLOT_COUNT; ++i)
612 CXINC;
613 }
614 cxstack_ix -= SLOT_COUNT; /* undo allocation */
615
616 c->mainstack = PL_mainstack;
617
618 {
619 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
620
621 slot->defav = GvAV (PL_defgv);
622 slot->defsv = DEFSV;
623 slot->errsv = ERRSV;
624 slot->irsgv = GvSV (irsgv);
625
626 #define VAR(name,type) slot->name = PL_ ## name;
627 # include "state.h"
628 #undef VAR
629 }
630}
631
632/*
633 * allocate various perl stacks. This is almost an exact copy
634 * of perl.c:init_stacks, except that it uses less memory
635 * on the (sometimes correct) assumption that coroutines do
636 * not usually need a lot of stackspace.
637 */
638#if CORO_PREFER_PERL_FUNCTIONS
639# define coro_init_stacks(thx) init_stacks ()
640#else
641static void
642coro_init_stacks (pTHX)
643{
644 PL_curstackinfo = new_stackinfo(32, 8);
645 PL_curstackinfo->si_type = PERLSI_MAIN;
646 PL_curstack = PL_curstackinfo->si_stack;
647 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
648
649 PL_stack_base = AvARRAY(PL_curstack);
650 PL_stack_sp = PL_stack_base;
651 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
652
653 New(50,PL_tmps_stack,32,SV*);
654 PL_tmps_floor = -1;
655 PL_tmps_ix = -1;
656 PL_tmps_max = 32;
657
658 New(54,PL_markstack,16,I32);
659 PL_markstack_ptr = PL_markstack;
660 PL_markstack_max = PL_markstack + 16;
661
662#ifdef SET_MARK_OFFSET
663 SET_MARK_OFFSET;
664#endif
665
666 New(54,PL_scopestack,8,I32);
667 PL_scopestack_ix = 0;
668 PL_scopestack_max = 8;
669
670 New(54,PL_savestack,24,ANY);
671 PL_savestack_ix = 0;
672 PL_savestack_max = 24;
673
674#if !PERL_VERSION_ATLEAST (5,10,0)
675 New(54,PL_retstack,4,OP*);
676 PL_retstack_ix = 0;
677 PL_retstack_max = 4;
678#endif
679}
680#endif
681
682/*
683 * destroy the stacks, the callchain etc...
684 */
685static void
686coro_destruct_stacks (pTHX)
687{
688 while (PL_curstackinfo->si_next)
689 PL_curstackinfo = PL_curstackinfo->si_next;
690
691 while (PL_curstackinfo)
692 {
693 PERL_SI *p = PL_curstackinfo->si_prev;
694
695 if (!IN_DESTRUCT)
696 SvREFCNT_dec (PL_curstackinfo->si_stack);
697
698 Safefree (PL_curstackinfo->si_cxstack);
699 Safefree (PL_curstackinfo);
700 PL_curstackinfo = p;
701 }
702
703 Safefree (PL_tmps_stack);
704 Safefree (PL_markstack);
705 Safefree (PL_scopestack);
706 Safefree (PL_savestack);
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 Safefree (PL_retstack);
709#endif
710}
711
712#define CORO_RSS \
713 rss += sizeof (SYM (curstackinfo)); \
714 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
715 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
716 rss += SYM (tmps_max) * sizeof (SV *); \
717 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
718 rss += SYM (scopestack_max) * sizeof (I32); \
719 rss += SYM (savestack_max) * sizeof (ANY);
720
721static size_t
722coro_rss (pTHX_ struct coro *coro)
723{
724 size_t rss = sizeof (*coro);
725
726 if (coro->mainstack)
727 {
728 if (coro->flags & CF_RUNNING)
729 {
730 #define SYM(sym) PL_ ## sym
731 CORO_RSS;
732 #undef SYM
733 }
734 else
735 {
736 #define SYM(sym) coro->slot->sym
737 CORO_RSS;
738 #undef SYM
739 }
740 }
741
742 return rss;
743}
744
745/** coroutine stack handling ************************************************/
746
747static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
748static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
750
751/* apparently < 5.8.8 */
752#ifndef MgPV_nolen_const
753#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
754 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
755 (const char*)(mg)->mg_ptr)
756#endif
757
758/*
759 * This overrides the default magic get method of %SIG elements.
760 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
761 * and instead of tryign to save and restore the hash elements, we just provide
762 * readback here.
763 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
764 * not expecting this to actually change the hook. This is a potential problem
765 * when a schedule happens then, but we ignore this.
766 */
861static void 767static int
862api_schedule (void) 768coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
863{ 769{
864 SV *prev, *next; 770 const char *s = MgPV_nolen_const (mg);
865 771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = 0;
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
811}
812
813static int
814coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
815{
816 const char *s = MgPV_nolen_const (mg);
817
818 if (*s == '_')
819 {
820 SV **svp = 0;
821
822 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
823 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
824
825 if (svp)
826 {
827 SV *old = *svp;
828 *svp = newSVsv (sv);
829 SvREFCNT_dec (old);
830 return 0;
831 }
832 }
833
834 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
835}
836
837static void
838prepare_nop (pTHX_ struct coro_transfer_args *ta)
839{
840 /* kind of mega-hacky, but works */
841 ta->next = ta->prev = (struct coro *)ta;
842}
843
844static int
845slf_check_nop (pTHX_ struct CoroSLF *frame)
846{
847 return 0;
848}
849
850static int
851slf_check_repeat (pTHX_ struct CoroSLF *frame)
852{
853 return 1;
854}
855
856static UNOP coro_setup_op;
857
858static void NOINLINE /* noinline to keep it out of the transfer fast path */
859coro_setup (pTHX_ struct coro *coro)
860{
861 /*
862 * emulate part of the perl startup here.
863 */
864 coro_init_stacks (aTHX);
865
866 PL_runops = RUNOPS_DEFAULT;
867 PL_curcop = &PL_compiling;
868 PL_in_eval = EVAL_NULL;
869 PL_comppad = 0;
870 PL_curpm = 0;
871 PL_curpad = 0;
872 PL_localizing = 0;
873 PL_dirty = 0;
874 PL_restartop = 0;
875#if PERL_VERSION_ATLEAST (5,10,0)
876 PL_parser = 0;
877#endif
878
879 /* recreate the die/warn hooks */
880 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
881 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
882
883 GvSV (PL_defgv) = newSV (0);
884 GvAV (PL_defgv) = coro->args; coro->args = 0;
885 GvSV (PL_errgv) = newSV (0);
886 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
887 PL_rs = newSVsv (GvSV (irsgv));
888 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
889
890 {
891 dSP;
892 UNOP myop;
893
894 Zero (&myop, 1, UNOP);
895 myop.op_next = Nullop;
896 myop.op_type = OP_ENTERSUB;
897 myop.op_flags = OPf_WANT_VOID;
898
899 PUSHMARK (SP);
900 PUSHs ((SV *)coro->startcv);
901 PUTBACK;
902 PL_op = (OP *)&myop;
903 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
904 }
905
906 /* this newly created coroutine might be run on an existing cctx which most
907 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
908 */
909 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
910 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
911
912 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
913 coro_setup_op.op_next = PL_op;
914 coro_setup_op.op_type = OP_ENTERSUB;
915 coro_setup_op.op_ppaddr = pp_slf;
916 /* no flags etc. required, as an init function won't be called */
917
918 PL_op = (OP *)&coro_setup_op;
919
920 /* copy throw, in case it was set before coro_setup */
921 CORO_THROW = coro->except;
922}
923
924static void
925coro_destruct (pTHX_ struct coro *coro)
926{
927 if (!IN_DESTRUCT)
928 {
929 /* restore all saved variables and stuff */
930 LEAVE_SCOPE (0);
931 assert (PL_tmps_floor == -1);
932
933 /* free all temporaries */
934 FREETMPS;
935 assert (PL_tmps_ix == -1);
936
937 /* unwind all extra stacks */
938 POPSTACK_TO (PL_mainstack);
939
940 /* unwind main stack */
941 dounwind (-1);
942 }
943
944 SvREFCNT_dec (GvSV (PL_defgv));
945 SvREFCNT_dec (GvAV (PL_defgv));
946 SvREFCNT_dec (GvSV (PL_errgv));
947 SvREFCNT_dec (PL_defoutgv);
948 SvREFCNT_dec (PL_rs);
949 SvREFCNT_dec (GvSV (irsgv));
950
951 SvREFCNT_dec (PL_diehook);
952 SvREFCNT_dec (PL_warnhook);
953
954 SvREFCNT_dec (coro->saved_deffh);
955 SvREFCNT_dec (coro->rouse_cb);
956 SvREFCNT_dec (coro->invoke_cb);
957 SvREFCNT_dec (coro->invoke_av);
958
959 coro_destruct_stacks (aTHX);
960}
961
962INLINE void
963free_coro_mortal (pTHX)
964{
965 if (expect_true (coro_mortal))
966 {
967 SvREFCNT_dec (coro_mortal);
968 coro_mortal = 0;
969 }
970}
971
972static int
973runops_trace (pTHX)
974{
975 COP *oldcop = 0;
976 int oldcxix = -2;
977
978 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
979 {
980 PERL_ASYNC_CHECK ();
981
982 if (cctx_current->flags & CC_TRACE_ALL)
983 {
984 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
985 {
986 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
987 SV **bot, **top;
988 AV *av = newAV (); /* return values */
989 SV **cb;
990 dSP;
991
992 GV *gv = CvGV (cx->blk_sub.cv);
993 SV *fullname = sv_2mortal (newSV (0));
994 if (isGV (gv))
995 gv_efullname3 (fullname, gv, 0);
996
997 bot = PL_stack_base + cx->blk_oldsp + 1;
998 top = cx->blk_gimme == G_ARRAY ? SP + 1
999 : cx->blk_gimme == G_SCALAR ? bot + 1
1000 : bot;
1001
1002 av_extend (av, top - bot);
1003 while (bot < top)
1004 av_push (av, SvREFCNT_inc_NN (*bot++));
1005
1006 PL_runops = RUNOPS_DEFAULT;
1007 ENTER;
1008 SAVETMPS;
1009 EXTEND (SP, 3);
1010 PUSHMARK (SP);
1011 PUSHs (&PL_sv_no);
1012 PUSHs (fullname);
1013 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1014 PUTBACK;
1015 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1016 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1017 SPAGAIN;
1018 FREETMPS;
1019 LEAVE;
1020 PL_runops = runops_trace;
1021 }
1022
1023 if (oldcop != PL_curcop)
1024 {
1025 oldcop = PL_curcop;
1026
1027 if (PL_curcop != &PL_compiling)
1028 {
1029 SV **cb;
1030
1031 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1032 {
1033 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1034
1035 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1036 {
1037 dSP;
1038 GV *gv = CvGV (cx->blk_sub.cv);
1039 SV *fullname = sv_2mortal (newSV (0));
1040
1041 if (isGV (gv))
1042 gv_efullname3 (fullname, gv, 0);
1043
1044 PL_runops = RUNOPS_DEFAULT;
1045 ENTER;
1046 SAVETMPS;
1047 EXTEND (SP, 3);
1048 PUSHMARK (SP);
1049 PUSHs (&PL_sv_yes);
1050 PUSHs (fullname);
1051 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1052 PUTBACK;
1053 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1054 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1055 SPAGAIN;
1056 FREETMPS;
1057 LEAVE;
1058 PL_runops = runops_trace;
1059 }
1060
1061 oldcxix = cxstack_ix;
1062 }
1063
1064 if (cctx_current->flags & CC_TRACE_LINE)
1065 {
1066 dSP;
1067
1068 PL_runops = RUNOPS_DEFAULT;
1069 ENTER;
1070 SAVETMPS;
1071 EXTEND (SP, 3);
1072 PL_runops = RUNOPS_DEFAULT;
1073 PUSHMARK (SP);
1074 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1075 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1076 PUTBACK;
1077 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1078 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1079 SPAGAIN;
1080 FREETMPS;
1081 LEAVE;
1082 PL_runops = runops_trace;
1083 }
1084 }
1085 }
1086 }
1087 }
1088
1089 TAINT_NOT;
1090 return 0;
1091}
1092
1093static struct CoroSLF cctx_ssl_frame;
1094
1095static void
1096slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1097{
1098 ta->prev = 0;
1099}
1100
1101static int
1102slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1103{
1104 *frame = cctx_ssl_frame;
1105
1106 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1107}
1108
1109/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1110static void NOINLINE
1111cctx_prepare (pTHX)
1112{
1113 PL_top_env = &PL_start_env;
1114
1115 if (cctx_current->flags & CC_TRACE)
1116 PL_runops = runops_trace;
1117
1118 /* we already must be executing an SLF op, there is no other valid way
1119 * that can lead to creation of a new cctx */
1120 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1121 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1122
1123 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1124 cctx_ssl_frame = slf_frame;
1125
1126 slf_frame.prepare = slf_prepare_set_stacklevel;
1127 slf_frame.check = slf_check_set_stacklevel;
1128}
1129
1130/* the tail of transfer: execute stuff we can only do after a transfer */
1131INLINE void
1132transfer_tail (pTHX)
1133{
1134 free_coro_mortal (aTHX);
1135}
1136
1137/*
1138 * this is a _very_ stripped down perl interpreter ;)
1139 */
1140static void
1141cctx_run (void *arg)
1142{
1143#ifdef USE_ITHREADS
1144# if CORO_PTHREAD
1145 PERL_SET_CONTEXT (coro_thx);
1146# endif
1147#endif
1148 {
1149 dTHX;
1150
1151 /* normally we would need to skip the entersub here */
1152 /* not doing so will re-execute it, which is exactly what we want */
1153 /* PL_nop = PL_nop->op_next */
1154
1155 /* inject a fake subroutine call to cctx_init */
1156 cctx_prepare (aTHX);
1157
1158 /* cctx_run is the alternative tail of transfer() */
1159 transfer_tail (aTHX);
1160
1161 /* somebody or something will hit me for both perl_run and PL_restartop */
1162 PL_restartop = PL_op;
1163 perl_run (PL_curinterp);
1164 /*
1165 * Unfortunately, there is no way to get at the return values of the
1166 * coro body here, as perl_run destroys these
1167 */
1168
1169 /*
1170 * If perl-run returns we assume exit() was being called or the coro
1171 * fell off the end, which seems to be the only valid (non-bug)
1172 * reason for perl_run to return. We try to exit by jumping to the
1173 * bootstrap-time "top" top_env, as we cannot restore the "main"
1174 * coroutine as Coro has no such concept
1175 */
1176 PL_top_env = main_top_env;
1177 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1178 }
1179}
1180
1181static coro_cctx *
1182cctx_new ()
1183{
1184 coro_cctx *cctx;
1185
1186 ++cctx_count;
1187 New (0, cctx, 1, coro_cctx);
1188
1189 cctx->gen = cctx_gen;
1190 cctx->flags = 0;
1191 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1192
1193 return cctx;
1194}
1195
1196/* create a new cctx only suitable as source */
1197static coro_cctx *
1198cctx_new_empty ()
1199{
1200 coro_cctx *cctx = cctx_new ();
1201
1202 cctx->sptr = 0;
1203 coro_create (&cctx->cctx, 0, 0, 0, 0);
1204
1205 return cctx;
1206}
1207
1208/* create a new cctx suitable as destination/running a perl interpreter */
1209static coro_cctx *
1210cctx_new_run ()
1211{
1212 coro_cctx *cctx = cctx_new ();
1213 void *stack_start;
1214 size_t stack_size;
1215
1216#if HAVE_MMAP
1217 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1218 /* mmap supposedly does allocate-on-write for us */
1219 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1220
1221 if (cctx->sptr != (void *)-1)
1222 {
1223 #if CORO_STACKGUARD
1224 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1225 #endif
1226 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1227 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1228 cctx->flags |= CC_MAPPED;
1229 }
1230 else
1231#endif
1232 {
1233 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1234 New (0, cctx->sptr, cctx_stacksize, long);
1235
1236 if (!cctx->sptr)
1237 {
1238 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1239 _exit (EXIT_FAILURE);
1240 }
1241
1242 stack_start = cctx->sptr;
1243 stack_size = cctx->ssize;
1244 }
1245
1246 #if CORO_USE_VALGRIND
1247 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1248 #endif
1249
1250 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1251
1252 return cctx;
1253}
1254
1255static void
1256cctx_destroy (coro_cctx *cctx)
1257{
1258 if (!cctx)
1259 return;
1260
1261 assert (cctx != cctx_current);//D temporary
1262
1263 --cctx_count;
1264 coro_destroy (&cctx->cctx);
1265
1266 /* coro_transfer creates new, empty cctx's */
1267 if (cctx->sptr)
1268 {
1269 #if CORO_USE_VALGRIND
1270 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1271 #endif
1272
1273#if HAVE_MMAP
1274 if (cctx->flags & CC_MAPPED)
1275 munmap (cctx->sptr, cctx->ssize);
1276 else
1277#endif
1278 Safefree (cctx->sptr);
1279 }
1280
1281 Safefree (cctx);
1282}
1283
1284/* wether this cctx should be destructed */
1285#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1286
1287static coro_cctx *
1288cctx_get (pTHX)
1289{
1290 while (expect_true (cctx_first))
1291 {
1292 coro_cctx *cctx = cctx_first;
1293 cctx_first = cctx->next;
1294 --cctx_idle;
1295
1296 if (expect_true (!CCTX_EXPIRED (cctx)))
1297 return cctx;
1298
1299 cctx_destroy (cctx);
1300 }
1301
1302 return cctx_new_run ();
1303}
1304
1305static void
1306cctx_put (coro_cctx *cctx)
1307{
1308 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1309
1310 /* free another cctx if overlimit */
1311 if (expect_false (cctx_idle >= cctx_max_idle))
1312 {
1313 coro_cctx *first = cctx_first;
1314 cctx_first = first->next;
1315 --cctx_idle;
1316
1317 cctx_destroy (first);
1318 }
1319
1320 ++cctx_idle;
1321 cctx->next = cctx_first;
1322 cctx_first = cctx;
1323}
1324
1325/** coroutine switching *****************************************************/
1326
1327static void
1328transfer_check (pTHX_ struct coro *prev, struct coro *next)
1329{
1330 /* TODO: throwing up here is considered harmful */
1331
1332 if (expect_true (prev != next))
1333 {
1334 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1335 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1336
1337 if (expect_false (next->flags & CF_RUNNING))
1338 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1339
1340 if (expect_false (next->flags & CF_DESTROYED))
1341 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1342
1343#if !PERL_VERSION_ATLEAST (5,10,0)
1344 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1345 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1346#endif
1347 }
1348}
1349
1350/* always use the TRANSFER macro */
1351static void NOINLINE /* noinline so we have a fixed stackframe */
1352transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1353{
1354 dSTACKLEVEL;
1355
1356 /* sometimes transfer is only called to set idle_sp */
1357 if (expect_false (!prev))
1358 {
1359 cctx_current->idle_sp = STACKLEVEL;
1360 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1361 }
1362 else if (expect_true (prev != next))
1363 {
1364 coro_cctx *cctx_prev;
1365
1366 if (expect_false (prev->flags & CF_NEW))
1367 {
1368 /* create a new empty/source context */
1369 prev->flags &= ~CF_NEW;
1370 prev->flags |= CF_RUNNING;
1371 }
1372
1373 prev->flags &= ~CF_RUNNING;
1374 next->flags |= CF_RUNNING;
1375
1376 /* first get rid of the old state */
1377 save_perl (aTHX_ prev);
1378
1379 if (expect_false (next->flags & CF_NEW))
1380 {
1381 /* need to start coroutine */
1382 next->flags &= ~CF_NEW;
1383 /* setup coroutine call */
1384 coro_setup (aTHX_ next);
1385 }
1386 else
1387 load_perl (aTHX_ next);
1388
1389 assert (!prev->cctx);//D temporary
1390
1391 /* possibly untie and reuse the cctx */
1392 if (expect_true (
1393 cctx_current->idle_sp == STACKLEVEL
1394 && !(cctx_current->flags & CC_TRACE)
1395 && !force_cctx
1396 ))
1397 {
1398 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1399 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1400
1401 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1402 /* without this the next cctx_get might destroy the running cctx while still in use */
1403 if (expect_false (CCTX_EXPIRED (cctx_current)))
1404 if (expect_true (!next->cctx))
1405 next->cctx = cctx_get (aTHX);
1406
1407 cctx_put (cctx_current);
1408 }
1409 else
1410 prev->cctx = cctx_current;
1411
1412 ++next->usecount;
1413
1414 cctx_prev = cctx_current;
1415 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1416
1417 next->cctx = 0;
1418
1419 if (expect_false (cctx_prev != cctx_current))
1420 {
1421 cctx_prev->top_env = PL_top_env;
1422 PL_top_env = cctx_current->top_env;
1423 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1424 }
1425
1426 transfer_tail (aTHX);
1427 }
1428}
1429
1430#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1431#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1432
1433/** high level stuff ********************************************************/
1434
1435static int
1436coro_state_destroy (pTHX_ struct coro *coro)
1437{
1438 if (coro->flags & CF_DESTROYED)
1439 return 0;
1440
1441 if (coro->on_destroy)
1442 coro->on_destroy (aTHX_ coro);
1443
1444 coro->flags |= CF_DESTROYED;
1445
1446 if (coro->flags & CF_READY)
1447 {
1448 /* reduce nready, as destroying a ready coro effectively unreadies it */
1449 /* alternative: look through all ready queues and remove the coro */
1450 --coro_nready;
1451 }
1452 else
1453 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1454
1455 if (coro->mainstack && coro->mainstack != main_mainstack)
1456 {
1457 struct coro temp;
1458
1459 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1460
1461 save_perl (aTHX_ &temp);
1462 load_perl (aTHX_ coro);
1463
1464 coro_destruct (aTHX_ coro);
1465
1466 load_perl (aTHX_ &temp);
1467
1468 coro->slot = 0;
1469 }
1470
1471 cctx_destroy (coro->cctx);
1472 SvREFCNT_dec (coro->startcv);
1473 SvREFCNT_dec (coro->args);
1474 SvREFCNT_dec (CORO_THROW);
1475
1476 if (coro->next) coro->next->prev = coro->prev;
1477 if (coro->prev) coro->prev->next = coro->next;
1478 if (coro == coro_first) coro_first = coro->next;
1479
1480 return 1;
1481}
1482
1483static int
1484coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1485{
1486 struct coro *coro = (struct coro *)mg->mg_ptr;
1487 mg->mg_ptr = 0;
1488
1489 coro->hv = 0;
1490
1491 if (--coro->refcnt < 0)
1492 {
1493 coro_state_destroy (aTHX_ coro);
1494 Safefree (coro);
1495 }
1496
1497 return 0;
1498}
1499
1500static int
1501coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1502{
1503 struct coro *coro = (struct coro *)mg->mg_ptr;
1504
1505 ++coro->refcnt;
1506
1507 return 0;
1508}
1509
1510static MGVTBL coro_state_vtbl = {
1511 0, 0, 0, 0,
1512 coro_state_free,
1513 0,
1514#ifdef MGf_DUP
1515 coro_state_dup,
1516#else
1517# define MGf_DUP 0
1518#endif
1519};
1520
1521static void
1522prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1523{
1524 ta->prev = SvSTATE (prev_sv);
1525 ta->next = SvSTATE (next_sv);
1526 TRANSFER_CHECK (*ta);
1527}
1528
1529static void
1530api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1531{
1532 struct coro_transfer_args ta;
1533
1534 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1535 TRANSFER (ta, 1);
1536}
1537
1538/*****************************************************************************/
1539/* gensub: simple closure generation utility */
1540
1541#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1542
1543/* create a closure from XS, returns a code reference */
1544/* the arg can be accessed via GENSUB_ARG from the callback */
1545/* the callback must use dXSARGS/XSRETURN */
1546static SV *
1547gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1548{
1549 CV *cv = (CV *)newSV (0);
1550
1551 sv_upgrade ((SV *)cv, SVt_PVCV);
1552
1553 CvANON_on (cv);
1554 CvISXSUB_on (cv);
1555 CvXSUB (cv) = xsub;
1556 GENSUB_ARG = arg;
1557
1558 return newRV_noinc ((SV *)cv);
1559}
1560
1561/** Coro ********************************************************************/
1562
1563INLINE void
1564coro_enq (pTHX_ struct coro *coro)
1565{
1566 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1567}
1568
1569INLINE SV *
1570coro_deq (pTHX)
1571{
1572 int prio;
1573
1574 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1575 if (AvFILLp (coro_ready [prio]) >= 0)
1576 return av_shift (coro_ready [prio]);
1577
1578 return 0;
1579}
1580
1581static int
1582api_ready (pTHX_ SV *coro_sv)
1583{
1584 struct coro *coro;
1585 SV *sv_hook;
1586 void (*xs_hook)(void);
1587
1588 coro = SvSTATE (coro_sv);
1589
1590 if (coro->flags & CF_READY)
1591 return 0;
1592
1593 coro->flags |= CF_READY;
1594
1595 sv_hook = coro_nready ? 0 : coro_readyhook;
1596 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1597
1598 coro_enq (aTHX_ coro);
1599 ++coro_nready;
1600
1601 if (sv_hook)
1602 {
1603 dSP;
1604
1605 ENTER;
1606 SAVETMPS;
1607
1608 PUSHMARK (SP);
1609 PUTBACK;
1610 call_sv (sv_hook, G_VOID | G_DISCARD);
1611
1612 FREETMPS;
1613 LEAVE;
1614 }
1615
1616 if (xs_hook)
1617 xs_hook ();
1618
1619 return 1;
1620}
1621
1622static int
1623api_is_ready (pTHX_ SV *coro_sv)
1624{
1625 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1626}
1627
1628/* expects to own a reference to next->hv */
1629INLINE void
1630prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1631{
866 prev = SvRV (GvSV (coro_current)); 1632 SV *prev_sv = SvRV (coro_current);
867 next = coro_deq (PRIO_MIN);
868 1633
869 if (!next) 1634 ta->prev = SvSTATE_hv (prev_sv);
870 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1635 ta->next = next;
871 1636
872 /* free this only after the transfer */ 1637 TRANSFER_CHECK (*ta);
1638
1639 SvRV_set (coro_current, (SV *)next->hv);
1640
1641 free_coro_mortal (aTHX);
873 coro_mortal = prev; 1642 coro_mortal = prev_sv;
874 SV_CORO (prev, "Coro::schedule");
875
876 SvRV (GvSV (coro_current)) = next;
877
878 SV_CORO (next, "Coro::schedule");
879
880 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
882} 1643}
883 1644
884static void 1645static void
885api_cede (void) 1646prepare_schedule (pTHX_ struct coro_transfer_args *ta)
886{ 1647{
887 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1648 for (;;)
1649 {
1650 SV *next_sv = coro_deq (aTHX);
888 1651
1652 if (expect_true (next_sv))
1653 {
1654 struct coro *next = SvSTATE_hv (next_sv);
1655
1656 /* cannot transfer to destroyed coros, skip and look for next */
1657 if (expect_false (next->flags & CF_DESTROYED))
1658 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1659 else
1660 {
1661 next->flags &= ~CF_READY;
1662 --coro_nready;
1663
1664 prepare_schedule_to (aTHX_ ta, next);
1665 break;
1666 }
1667 }
1668 else
1669 {
1670 /* nothing to schedule: call the idle handler */
1671 if (SvROK (sv_idle)
1672 && SvOBJECT (SvRV (sv_idle)))
1673 {
1674 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1675 api_ready (SvRV (sv_idle));
1676 --coro_nready;
1677 }
1678 else
1679 {
1680 dSP;
1681
1682 ENTER;
1683 SAVETMPS;
1684
1685 PUSHMARK (SP);
1686 PUTBACK;
1687 call_sv (sv_idle, G_VOID | G_DISCARD);
1688
1689 FREETMPS;
1690 LEAVE;
1691 }
1692 }
1693 }
1694}
1695
1696INLINE void
1697prepare_cede (pTHX_ struct coro_transfer_args *ta)
1698{
1699 api_ready (aTHX_ coro_current);
1700 prepare_schedule (aTHX_ ta);
1701}
1702
1703INLINE void
1704prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1705{
1706 SV *prev = SvRV (coro_current);
1707
1708 if (coro_nready)
1709 {
1710 prepare_schedule (aTHX_ ta);
1711 api_ready (aTHX_ prev);
1712 }
1713 else
1714 prepare_nop (aTHX_ ta);
1715}
1716
1717static void
889 api_schedule (); 1718api_schedule (pTHX)
890} 1719{
1720 struct coro_transfer_args ta;
891 1721
1722 prepare_schedule (aTHX_ &ta);
1723 TRANSFER (ta, 1);
1724}
1725
1726static void
1727api_schedule_to (pTHX_ SV *coro_sv)
1728{
1729 struct coro_transfer_args ta;
1730 struct coro *next = SvSTATE (coro_sv);
1731
1732 SvREFCNT_inc_NN (coro_sv);
1733 prepare_schedule_to (aTHX_ &ta, next);
1734}
1735
1736static int
1737api_cede (pTHX)
1738{
1739 struct coro_transfer_args ta;
1740
1741 prepare_cede (aTHX_ &ta);
1742
1743 if (expect_true (ta.prev != ta.next))
1744 {
1745 TRANSFER (ta, 1);
1746 return 1;
1747 }
1748 else
1749 return 0;
1750}
1751
1752static int
1753api_cede_notself (pTHX)
1754{
1755 if (coro_nready)
1756 {
1757 struct coro_transfer_args ta;
1758
1759 prepare_cede_notself (aTHX_ &ta);
1760 TRANSFER (ta, 1);
1761 return 1;
1762 }
1763 else
1764 return 0;
1765}
1766
1767static void
1768api_trace (pTHX_ SV *coro_sv, int flags)
1769{
1770 struct coro *coro = SvSTATE (coro_sv);
1771
1772 if (coro->flags & CF_RUNNING)
1773 croak ("cannot enable tracing on a running coroutine, caught");
1774
1775 if (flags & CC_TRACE)
1776 {
1777 if (!coro->cctx)
1778 coro->cctx = cctx_new_run ();
1779 else if (!(coro->cctx->flags & CC_TRACE))
1780 croak ("cannot enable tracing on coroutine with custom stack, caught");
1781
1782 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1783 }
1784 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1785 {
1786 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1787
1788 if (coro->flags & CF_RUNNING)
1789 PL_runops = RUNOPS_DEFAULT;
1790 else
1791 coro->slot->runops = RUNOPS_DEFAULT;
1792 }
1793}
1794
1795static void
1796coro_call_on_destroy (pTHX_ struct coro *coro)
1797{
1798 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1799 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1800
1801 if (on_destroyp)
1802 {
1803 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1804
1805 while (AvFILLp (on_destroy) >= 0)
1806 {
1807 dSP; /* don't disturb outer sp */
1808 SV *cb = av_pop (on_destroy);
1809
1810 PUSHMARK (SP);
1811
1812 if (statusp)
1813 {
1814 int i;
1815 AV *status = (AV *)SvRV (*statusp);
1816 EXTEND (SP, AvFILLp (status) + 1);
1817
1818 for (i = 0; i <= AvFILLp (status); ++i)
1819 PUSHs (AvARRAY (status)[i]);
1820 }
1821
1822 PUTBACK;
1823 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1824 }
1825 }
1826}
1827
1828static void
1829slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1830{
1831 int i;
1832 HV *hv = (HV *)SvRV (coro_current);
1833 AV *av = newAV ();
1834
1835 av_extend (av, items - 1);
1836 for (i = 0; i < items; ++i)
1837 av_push (av, SvREFCNT_inc_NN (arg [i]));
1838
1839 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1840
1841 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1842 api_ready (aTHX_ sv_manager);
1843
1844 frame->prepare = prepare_schedule;
1845 frame->check = slf_check_repeat;
1846}
1847
1848/*****************************************************************************/
1849/* async pool handler */
1850
1851static int
1852slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1853{
1854 HV *hv = (HV *)SvRV (coro_current);
1855 struct coro *coro = (struct coro *)frame->data;
1856
1857 if (!coro->invoke_cb)
1858 return 1; /* loop till we have invoke */
1859 else
1860 {
1861 hv_store (hv, "desc", sizeof ("desc") - 1,
1862 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1863
1864 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1865
1866 {
1867 dSP;
1868 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1869 PUTBACK;
1870 }
1871
1872 SvREFCNT_dec (GvAV (PL_defgv));
1873 GvAV (PL_defgv) = coro->invoke_av;
1874 coro->invoke_av = 0;
1875
1876 return 0;
1877 }
1878}
1879
1880static void
1881slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1882{
1883 HV *hv = (HV *)SvRV (coro_current);
1884 struct coro *coro = SvSTATE_hv ((SV *)hv);
1885
1886 if (expect_true (coro->saved_deffh))
1887 {
1888 /* subsequent iteration */
1889 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1890 coro->saved_deffh = 0;
1891
1892 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1893 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1894 {
1895 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1896 coro->invoke_av = newAV ();
1897
1898 frame->prepare = prepare_nop;
1899 }
1900 else
1901 {
1902 av_clear (GvAV (PL_defgv));
1903 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1904
1905 coro->prio = 0;
1906
1907 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1908 api_trace (aTHX_ coro_current, 0);
1909
1910 frame->prepare = prepare_schedule;
1911 av_push (av_async_pool, SvREFCNT_inc (hv));
1912 }
1913 }
1914 else
1915 {
1916 /* first iteration, simply fall through */
1917 frame->prepare = prepare_nop;
1918 }
1919
1920 frame->check = slf_check_pool_handler;
1921 frame->data = (void *)coro;
1922}
1923
1924/*****************************************************************************/
1925/* rouse callback */
1926
1927#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1928
1929static void
1930coro_rouse_callback (pTHX_ CV *cv)
1931{
1932 dXSARGS;
1933 SV *data = (SV *)GENSUB_ARG;
1934
1935 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1936 {
1937 /* first call, set args */
1938 AV *av = newAV ();
1939 SV *coro = SvRV (data);
1940
1941 SvRV_set (data, (SV *)av);
1942 api_ready (aTHX_ coro);
1943 SvREFCNT_dec (coro);
1944
1945 /* better take a full copy of the arguments */
1946 while (items--)
1947 av_store (av, items, newSVsv (ST (items)));
1948 }
1949
1950 XSRETURN_EMPTY;
1951}
1952
1953static int
1954slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1955{
1956 SV *data = (SV *)frame->data;
1957
1958 if (CORO_THROW)
1959 return 0;
1960
1961 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1962 return 1;
1963
1964 /* now push all results on the stack */
1965 {
1966 dSP;
1967 AV *av = (AV *)SvRV (data);
1968 int i;
1969
1970 EXTEND (SP, AvFILLp (av) + 1);
1971 for (i = 0; i <= AvFILLp (av); ++i)
1972 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1973
1974 /* we have stolen the elements, so ste length to zero and free */
1975 AvFILLp (av) = -1;
1976 av_undef (av);
1977
1978 PUTBACK;
1979 }
1980
1981 return 0;
1982}
1983
1984static void
1985slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1986{
1987 SV *cb;
1988
1989 if (items)
1990 cb = arg [0];
1991 else
1992 {
1993 struct coro *coro = SvSTATE_current;
1994
1995 if (!coro->rouse_cb)
1996 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1997
1998 cb = sv_2mortal (coro->rouse_cb);
1999 coro->rouse_cb = 0;
2000 }
2001
2002 if (!SvROK (cb)
2003 || SvTYPE (SvRV (cb)) != SVt_PVCV
2004 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2005 croak ("Coro::rouse_wait called with illegal callback argument,");
2006
2007 {
2008 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2009 SV *data = (SV *)GENSUB_ARG;
2010
2011 frame->data = (void *)data;
2012 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2013 frame->check = slf_check_rouse_wait;
2014 }
2015}
2016
2017static SV *
2018coro_new_rouse_cb (pTHX)
2019{
2020 HV *hv = (HV *)SvRV (coro_current);
2021 struct coro *coro = SvSTATE_hv (hv);
2022 SV *data = newRV_inc ((SV *)hv);
2023 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2024
2025 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2026 SvREFCNT_dec (data); /* magicext increases the refcount */
2027
2028 SvREFCNT_dec (coro->rouse_cb);
2029 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2030
2031 return cb;
2032}
2033
2034/*****************************************************************************/
2035/* schedule-like-function opcode (SLF) */
2036
2037static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2038static const CV *slf_cv;
2039static SV **slf_argv;
2040static int slf_argc, slf_arga; /* count, allocated */
2041static I32 slf_ax; /* top of stack, for restore */
2042
2043/* this restores the stack in the case we patched the entersub, to */
2044/* recreate the stack frame as perl will on following calls */
2045/* since entersub cleared the stack */
2046static OP *
2047pp_restore (pTHX)
2048{
2049 int i;
2050 SV **SP = PL_stack_base + slf_ax;
2051
2052 PUSHMARK (SP);
2053
2054 EXTEND (SP, slf_argc + 1);
2055
2056 for (i = 0; i < slf_argc; ++i)
2057 PUSHs (sv_2mortal (slf_argv [i]));
2058
2059 PUSHs ((SV *)CvGV (slf_cv));
2060
2061 RETURNOP (slf_restore.op_first);
2062}
2063
2064static void
2065slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2066{
2067 SV **arg = (SV **)slf_frame.data;
2068
2069 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2070}
2071
2072static void
2073slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2074{
2075 if (items != 2)
2076 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2077
2078 frame->prepare = slf_prepare_transfer;
2079 frame->check = slf_check_nop;
2080 frame->data = (void *)arg; /* let's hope it will stay valid */
2081}
2082
2083static void
2084slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 frame->prepare = prepare_schedule;
2087 frame->check = slf_check_nop;
2088}
2089
2090static void
2091slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2092{
2093 struct coro *next = (struct coro *)slf_frame.data;
2094
2095 SvREFCNT_inc_NN (next->hv);
2096 prepare_schedule_to (aTHX_ ta, next);
2097}
2098
2099static void
2100slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2101{
2102 if (!items)
2103 croak ("Coro::schedule_to expects a coroutine argument, caught");
2104
2105 frame->data = (void *)SvSTATE (arg [0]);
2106 frame->prepare = slf_prepare_schedule_to;
2107 frame->check = slf_check_nop;
2108}
2109
2110static void
2111slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2112{
2113 api_ready (aTHX_ SvRV (coro_current));
2114
2115 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2116}
2117
2118static void
2119slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2120{
2121 frame->prepare = prepare_cede;
2122 frame->check = slf_check_nop;
2123}
2124
2125static void
2126slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2127{
2128 frame->prepare = prepare_cede_notself;
2129 frame->check = slf_check_nop;
2130}
2131
2132/*
2133 * these not obviously related functions are all rolled into one
2134 * function to increase chances that they all will call transfer with the same
2135 * stack offset
2136 * SLF stands for "schedule-like-function".
2137 */
2138static OP *
2139pp_slf (pTHX)
2140{
2141 I32 checkmark; /* mark SP to see how many elements check has pushed */
2142
2143 /* set up the slf frame, unless it has already been set-up */
2144 /* the latter happens when a new coro has been started */
2145 /* or when a new cctx was attached to an existing coroutine */
2146 if (expect_true (!slf_frame.prepare))
2147 {
2148 /* first iteration */
2149 dSP;
2150 SV **arg = PL_stack_base + TOPMARK + 1;
2151 int items = SP - arg; /* args without function object */
2152 SV *gv = *sp;
2153
2154 /* do a quick consistency check on the "function" object, and if it isn't */
2155 /* for us, divert to the real entersub */
2156 if (SvTYPE (gv) != SVt_PVGV
2157 || !GvCV (gv)
2158 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2159 return PL_ppaddr[OP_ENTERSUB](aTHX);
2160
2161 if (!(PL_op->op_flags & OPf_STACKED))
2162 {
2163 /* ampersand-form of call, use @_ instead of stack */
2164 AV *av = GvAV (PL_defgv);
2165 arg = AvARRAY (av);
2166 items = AvFILLp (av) + 1;
2167 }
2168
2169 /* now call the init function, which needs to set up slf_frame */
2170 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2171 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2172
2173 /* pop args */
2174 SP = PL_stack_base + POPMARK;
2175
2176 PUTBACK;
2177 }
2178
2179 /* now that we have a slf_frame, interpret it! */
2180 /* we use a callback system not to make the code needlessly */
2181 /* complicated, but so we can run multiple perl coros from one cctx */
2182
2183 do
2184 {
2185 struct coro_transfer_args ta;
2186
2187 slf_frame.prepare (aTHX_ &ta);
2188 TRANSFER (ta, 0);
2189
2190 checkmark = PL_stack_sp - PL_stack_base;
2191 }
2192 while (slf_frame.check (aTHX_ &slf_frame));
2193
2194 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2195
2196 /* exception handling */
2197 if (expect_false (CORO_THROW))
2198 {
2199 SV *exception = sv_2mortal (CORO_THROW);
2200
2201 CORO_THROW = 0;
2202 sv_setsv (ERRSV, exception);
2203 croak (0);
2204 }
2205
2206 /* return value handling - mostly like entersub */
2207 /* make sure we put something on the stack in scalar context */
2208 if (GIMME_V == G_SCALAR)
2209 {
2210 dSP;
2211 SV **bot = PL_stack_base + checkmark;
2212
2213 if (sp == bot) /* too few, push undef */
2214 bot [1] = &PL_sv_undef;
2215 else if (sp != bot + 1) /* too many, take last one */
2216 bot [1] = *sp;
2217
2218 SP = bot + 1;
2219
2220 PUTBACK;
2221 }
2222
2223 return NORMAL;
2224}
2225
2226static void
2227api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2228{
2229 int i;
2230 SV **arg = PL_stack_base + ax;
2231 int items = PL_stack_sp - arg + 1;
2232
2233 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2234
2235 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2236 && PL_op->op_ppaddr != pp_slf)
2237 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2238
2239 CvFLAGS (cv) |= CVf_SLF;
2240 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2241 slf_cv = cv;
2242
2243 /* we patch the op, and then re-run the whole call */
2244 /* we have to put the same argument on the stack for this to work */
2245 /* and this will be done by pp_restore */
2246 slf_restore.op_next = (OP *)&slf_restore;
2247 slf_restore.op_type = OP_CUSTOM;
2248 slf_restore.op_ppaddr = pp_restore;
2249 slf_restore.op_first = PL_op;
2250
2251 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2252
2253 if (PL_op->op_flags & OPf_STACKED)
2254 {
2255 if (items > slf_arga)
2256 {
2257 slf_arga = items;
2258 free (slf_argv);
2259 slf_argv = malloc (slf_arga * sizeof (SV *));
2260 }
2261
2262 slf_argc = items;
2263
2264 for (i = 0; i < items; ++i)
2265 slf_argv [i] = SvREFCNT_inc (arg [i]);
2266 }
2267 else
2268 slf_argc = 0;
2269
2270 PL_op->op_ppaddr = pp_slf;
2271 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2272
2273 PL_op = (OP *)&slf_restore;
2274}
2275
2276/*****************************************************************************/
2277/* PerlIO::cede */
2278
2279typedef struct
2280{
2281 PerlIOBuf base;
2282 NV next, every;
2283} PerlIOCede;
2284
2285static IV
2286PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2287{
2288 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2289
2290 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2291 self->next = nvtime () + self->every;
2292
2293 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2294}
2295
2296static SV *
2297PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2298{
2299 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2300
2301 return newSVnv (self->every);
2302}
2303
2304static IV
2305PerlIOCede_flush (pTHX_ PerlIO *f)
2306{
2307 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2308 double now = nvtime ();
2309
2310 if (now >= self->next)
2311 {
2312 api_cede (aTHX);
2313 self->next = now + self->every;
2314 }
2315
2316 return PerlIOBuf_flush (aTHX_ f);
2317}
2318
2319static PerlIO_funcs PerlIO_cede =
2320{
2321 sizeof(PerlIO_funcs),
2322 "cede",
2323 sizeof(PerlIOCede),
2324 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2325 PerlIOCede_pushed,
2326 PerlIOBuf_popped,
2327 PerlIOBuf_open,
2328 PerlIOBase_binmode,
2329 PerlIOCede_getarg,
2330 PerlIOBase_fileno,
2331 PerlIOBuf_dup,
2332 PerlIOBuf_read,
2333 PerlIOBuf_unread,
2334 PerlIOBuf_write,
2335 PerlIOBuf_seek,
2336 PerlIOBuf_tell,
2337 PerlIOBuf_close,
2338 PerlIOCede_flush,
2339 PerlIOBuf_fill,
2340 PerlIOBase_eof,
2341 PerlIOBase_error,
2342 PerlIOBase_clearerr,
2343 PerlIOBase_setlinebuf,
2344 PerlIOBuf_get_base,
2345 PerlIOBuf_bufsiz,
2346 PerlIOBuf_get_ptr,
2347 PerlIOBuf_get_cnt,
2348 PerlIOBuf_set_ptrcnt,
2349};
2350
2351/*****************************************************************************/
2352/* Coro::Semaphore & Coro::Signal */
2353
2354static SV *
2355coro_waitarray_new (pTHX_ int count)
2356{
2357 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2358 AV *av = newAV ();
2359 SV **ary;
2360
2361 /* unfortunately, building manually saves memory */
2362 Newx (ary, 2, SV *);
2363 AvALLOC (av) = ary;
2364 /*AvARRAY (av) = ary;*/
2365 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2366 AvMAX (av) = 1;
2367 AvFILLp (av) = 0;
2368 ary [0] = newSViv (count);
2369
2370 return newRV_noinc ((SV *)av);
2371}
2372
2373/* semaphore */
2374
2375static void
2376coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2377{
2378 SV *count_sv = AvARRAY (av)[0];
2379 IV count = SvIVX (count_sv);
2380
2381 count += adjust;
2382 SvIVX (count_sv) = count;
2383
2384 /* now wake up as many waiters as are expected to lock */
2385 while (count > 0 && AvFILLp (av) > 0)
2386 {
2387 SV *cb;
2388
2389 /* swap first two elements so we can shift a waiter */
2390 AvARRAY (av)[0] = AvARRAY (av)[1];
2391 AvARRAY (av)[1] = count_sv;
2392 cb = av_shift (av);
2393
2394 if (SvOBJECT (cb))
2395 {
2396 api_ready (aTHX_ cb);
2397 --count;
2398 }
2399 else if (SvTYPE (cb) == SVt_PVCV)
2400 {
2401 dSP;
2402 PUSHMARK (SP);
2403 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2404 PUTBACK;
2405 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2406 }
2407
2408 SvREFCNT_dec (cb);
2409 }
2410}
2411
2412static void
2413coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2414{
2415 /* call $sem->adjust (0) to possibly wake up some other waiters */
2416 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2417}
2418
2419static int
2420slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2421{
2422 AV *av = (AV *)frame->data;
2423 SV *count_sv = AvARRAY (av)[0];
2424
2425 /* if we are about to throw, don't actually acquire the lock, just throw */
2426 if (CORO_THROW)
2427 return 0;
2428 else if (SvIVX (count_sv) > 0)
2429 {
2430 SvSTATE_current->on_destroy = 0;
2431
2432 if (acquire)
2433 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2434 else
2435 coro_semaphore_adjust (aTHX_ av, 0);
2436
2437 return 0;
2438 }
2439 else
2440 {
2441 int i;
2442 /* if we were woken up but can't down, we look through the whole */
2443 /* waiters list and only add us if we aren't in there already */
2444 /* this avoids some degenerate memory usage cases */
2445
2446 for (i = 1; i <= AvFILLp (av); ++i)
2447 if (AvARRAY (av)[i] == SvRV (coro_current))
2448 return 1;
2449
2450 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2451 return 1;
2452 }
2453}
2454
2455static int
2456slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2457{
2458 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2459}
2460
2461static int
2462slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2463{
2464 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2465}
2466
2467static void
2468slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2469{
2470 AV *av = (AV *)SvRV (arg [0]);
2471
2472 if (SvIVX (AvARRAY (av)[0]) > 0)
2473 {
2474 frame->data = (void *)av;
2475 frame->prepare = prepare_nop;
2476 }
2477 else
2478 {
2479 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2480
2481 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2482 frame->prepare = prepare_schedule;
2483
2484 /* to avoid race conditions when a woken-up coro gets terminated */
2485 /* we arrange for a temporary on_destroy that calls adjust (0) */
2486 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2487 }
2488}
2489
2490static void
2491slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2492{
2493 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2494 frame->check = slf_check_semaphore_down;
2495}
2496
2497static void
2498slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2499{
2500 if (items >= 2)
2501 {
2502 /* callback form */
2503 AV *av = (AV *)SvRV (arg [0]);
2504 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2505
2506 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2507
2508 if (SvIVX (AvARRAY (av)[0]) > 0)
2509 coro_semaphore_adjust (aTHX_ av, 0);
2510
2511 frame->prepare = prepare_nop;
2512 frame->check = slf_check_nop;
2513 }
2514 else
2515 {
2516 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2517 frame->check = slf_check_semaphore_wait;
2518 }
2519}
2520
2521/* signal */
2522
2523static void
2524coro_signal_wake (pTHX_ AV *av, int count)
2525{
2526 SvIVX (AvARRAY (av)[0]) = 0;
2527
2528 /* now signal count waiters */
2529 while (count > 0 && AvFILLp (av) > 0)
2530 {
2531 SV *cb;
2532
2533 /* swap first two elements so we can shift a waiter */
2534 cb = AvARRAY (av)[0];
2535 AvARRAY (av)[0] = AvARRAY (av)[1];
2536 AvARRAY (av)[1] = cb;
2537
2538 cb = av_shift (av);
2539
2540 api_ready (aTHX_ cb);
2541 sv_setiv (cb, 0); /* signal waiter */
2542 SvREFCNT_dec (cb);
2543
2544 --count;
2545 }
2546}
2547
2548static int
2549slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2550{
2551 /* if we are about to throw, also stop waiting */
2552 return SvROK ((SV *)frame->data) && !CORO_THROW;
2553}
2554
2555static void
2556slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 AV *av = (AV *)SvRV (arg [0]);
2559
2560 if (SvIVX (AvARRAY (av)[0]))
2561 {
2562 SvIVX (AvARRAY (av)[0]) = 0;
2563 frame->prepare = prepare_nop;
2564 frame->check = slf_check_nop;
2565 }
2566 else
2567 {
2568 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2569
2570 av_push (av, waiter);
2571
2572 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2573 frame->prepare = prepare_schedule;
2574 frame->check = slf_check_signal_wait;
2575 }
2576}
2577
2578/*****************************************************************************/
2579/* Coro::AIO */
2580
2581#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2582
2583/* helper storage struct */
2584struct io_state
2585{
2586 int errorno;
2587 I32 laststype; /* U16 in 5.10.0 */
2588 int laststatval;
2589 Stat_t statcache;
2590};
2591
2592static void
2593coro_aio_callback (pTHX_ CV *cv)
2594{
2595 dXSARGS;
2596 AV *state = (AV *)GENSUB_ARG;
2597 SV *coro = av_pop (state);
2598 SV *data_sv = newSV (sizeof (struct io_state));
2599
2600 av_extend (state, items - 1);
2601
2602 sv_upgrade (data_sv, SVt_PV);
2603 SvCUR_set (data_sv, sizeof (struct io_state));
2604 SvPOK_only (data_sv);
2605
2606 {
2607 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2608
2609 data->errorno = errno;
2610 data->laststype = PL_laststype;
2611 data->laststatval = PL_laststatval;
2612 data->statcache = PL_statcache;
2613 }
2614
2615 /* now build the result vector out of all the parameters and the data_sv */
2616 {
2617 int i;
2618
2619 for (i = 0; i < items; ++i)
2620 av_push (state, SvREFCNT_inc_NN (ST (i)));
2621 }
2622
2623 av_push (state, data_sv);
2624
2625 api_ready (aTHX_ coro);
2626 SvREFCNT_dec (coro);
2627 SvREFCNT_dec ((AV *)state);
2628}
2629
2630static int
2631slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2632{
2633 AV *state = (AV *)frame->data;
2634
2635 /* if we are about to throw, return early */
2636 /* this does not cancel the aio request, but at least */
2637 /* it quickly returns */
2638 if (CORO_THROW)
2639 return 0;
2640
2641 /* one element that is an RV? repeat! */
2642 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2643 return 1;
2644
2645 /* restore status */
2646 {
2647 SV *data_sv = av_pop (state);
2648 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2649
2650 errno = data->errorno;
2651 PL_laststype = data->laststype;
2652 PL_laststatval = data->laststatval;
2653 PL_statcache = data->statcache;
2654
2655 SvREFCNT_dec (data_sv);
2656 }
2657
2658 /* push result values */
2659 {
2660 dSP;
2661 int i;
2662
2663 EXTEND (SP, AvFILLp (state) + 1);
2664 for (i = 0; i <= AvFILLp (state); ++i)
2665 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2666
2667 PUTBACK;
2668 }
2669
2670 return 0;
2671}
2672
2673static void
2674slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2675{
2676 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2677 SV *coro_hv = SvRV (coro_current);
2678 struct coro *coro = SvSTATE_hv (coro_hv);
2679
2680 /* put our coroutine id on the state arg */
2681 av_push (state, SvREFCNT_inc_NN (coro_hv));
2682
2683 /* first see whether we have a non-zero priority and set it as AIO prio */
2684 if (coro->prio)
2685 {
2686 dSP;
2687
2688 static SV *prio_cv;
2689 static SV *prio_sv;
2690
2691 if (expect_false (!prio_cv))
2692 {
2693 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2694 prio_sv = newSViv (0);
2695 }
2696
2697 PUSHMARK (SP);
2698 sv_setiv (prio_sv, coro->prio);
2699 XPUSHs (prio_sv);
2700
2701 PUTBACK;
2702 call_sv (prio_cv, G_VOID | G_DISCARD);
2703 }
2704
2705 /* now call the original request */
2706 {
2707 dSP;
2708 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2709 int i;
2710
2711 PUSHMARK (SP);
2712
2713 /* first push all args to the stack */
2714 EXTEND (SP, items + 1);
2715
2716 for (i = 0; i < items; ++i)
2717 PUSHs (arg [i]);
2718
2719 /* now push the callback closure */
2720 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2721
2722 /* now call the AIO function - we assume our request is uncancelable */
2723 PUTBACK;
2724 call_sv ((SV *)req, G_VOID | G_DISCARD);
2725 }
2726
2727 /* now that the requets is going, we loop toll we have a result */
2728 frame->data = (void *)state;
2729 frame->prepare = prepare_schedule;
2730 frame->check = slf_check_aio_req;
2731}
2732
2733static void
2734coro_aio_req_xs (pTHX_ CV *cv)
2735{
2736 dXSARGS;
2737
2738 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2739
2740 XSRETURN_EMPTY;
2741}
2742
2743/*****************************************************************************/
2744
2745#if CORO_CLONE
2746# include "clone.c"
2747#endif
2748
892MODULE = Coro::State PACKAGE = Coro::State 2749MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
893 2750
894PROTOTYPES: ENABLE 2751PROTOTYPES: DISABLE
895 2752
896BOOT: 2753BOOT:
897{ /* {} necessary for stoopid perl-5.6.x */ 2754{
898 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2755#ifdef USE_ITHREADS
899 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2756# if CORO_PTHREAD
2757 coro_thx = PERL_GET_CONTEXT;
2758# endif
2759#endif
2760 BOOT_PAGESIZE;
2761
2762 cctx_current = cctx_new_empty ();
2763
2764 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2765 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2766
2767 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2768 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2769 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2770
2771 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2772 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2773 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2774
900 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2775 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901 2776
902 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2777 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
903 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2778 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
904 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2779 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
905 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2780 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
906
907 if (!padlist_cache)
908 padlist_cache = newHV ();
909 2781
910 main_mainstack = PL_mainstack; 2782 main_mainstack = PL_mainstack;
2783 main_top_env = PL_top_env;
911 2784
2785 while (main_top_env->je_prev)
2786 main_top_env = main_top_env->je_prev;
2787
2788 {
2789 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2790
2791 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2792 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2793
2794 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2795 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2796 }
2797
912 coroapi.ver = CORO_API_VERSION; 2798 coroapi.ver = CORO_API_VERSION;
2799 coroapi.rev = CORO_API_REVISION;
2800
913 coroapi.transfer = api_transfer; 2801 coroapi.transfer = api_transfer;
914}
915 2802
916Coro::State 2803 coroapi.sv_state = SvSTATE_;
917_newprocess(args) 2804 coroapi.execute_slf = api_execute_slf;
918 SV * args 2805 coroapi.prepare_nop = prepare_nop;
919 PROTOTYPE: $ 2806 coroapi.prepare_schedule = prepare_schedule;
2807 coroapi.prepare_cede = prepare_cede;
2808 coroapi.prepare_cede_notself = prepare_cede_notself;
2809
2810 {
2811 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2812
2813 if (!svp) croak ("Time::HiRes is required");
2814 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2815
2816 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2817 }
2818
2819 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2820}
2821
2822SV *
2823new (char *klass, ...)
2824 ALIAS:
2825 Coro::new = 1
920 CODE: 2826 CODE:
921 Coro__State coro; 2827{
2828 struct coro *coro;
2829 MAGIC *mg;
2830 HV *hv;
2831 CV *cb;
2832 int i;
922 2833
923 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2834 if (items > 1)
924 croak ("Coro::State::_newprocess expects an arrayref");
925 2835 {
2836 cb = coro_sv_2cv (aTHX_ ST (1));
2837
2838 if (!ix)
2839 {
2840 if (CvISXSUB (cb))
2841 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2842
2843 if (!CvROOT (cb))
2844 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2845 }
2846 }
2847
926 New (0, coro, 1, struct coro); 2848 Newz (0, coro, 1, struct coro);
2849 coro->args = newAV ();
2850 coro->flags = CF_NEW;
927 2851
928 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2852 if (coro_first) coro_first->prev = coro;
929 coro->mainstack = 0; /* actual work is done inside transfer */ 2853 coro->next = coro_first;
930 coro->stack = 0; 2854 coro_first = coro;
931 2855
932 RETVAL = coro; 2856 coro->hv = hv = newHV ();
2857 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2858 mg->mg_flags |= MGf_DUP;
2859 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2860
2861 if (items > 1)
2862 {
2863 av_extend (coro->args, items - 1 + ix - 1);
2864
2865 if (ix)
2866 {
2867 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2868 cb = cv_coro_run;
2869 }
2870
2871 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2872
2873 for (i = 2; i < items; i++)
2874 av_push (coro->args, newSVsv (ST (i)));
2875 }
2876}
933 OUTPUT: 2877 OUTPUT:
934 RETVAL 2878 RETVAL
935 2879
936void 2880void
937transfer(prev, next, flags) 2881transfer (...)
938 SV *prev
939 SV *next
940 int flags
941 PROTOTYPE: @ 2882 PROTOTYPE: $$
942 CODE: 2883 CODE:
943 PUTBACK; 2884 CORO_EXECUTE_SLF_XS (slf_init_transfer);
944 SV_CORO (next, "Coro::transfer"); 2885
945 SV_CORO (prev, "Coro::transfer"); 2886bool
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2887_destroy (SV *coro_sv)
947 SPAGAIN; 2888 CODE:
2889 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2890 OUTPUT:
2891 RETVAL
948 2892
949void 2893void
950DESTROY(coro) 2894_exit (int code)
951 Coro::State coro 2895 PROTOTYPE: $
952 CODE: 2896 CODE:
2897 _exit (code);
953 2898
954 if (coro->mainstack && coro->mainstack != main_mainstack) 2899SV *
2900clone (Coro::State coro)
2901 CODE:
2902{
2903#if CORO_CLONE
2904 struct coro *ncoro = coro_clone (coro);
2905 MAGIC *mg;
2906 /* TODO: too much duplication */
2907 ncoro->hv = newHV ();
2908 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2909 mg->mg_flags |= MGf_DUP;
2910 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2911#else
2912 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2913#endif
2914}
2915 OUTPUT:
2916 RETVAL
2917
2918int
2919cctx_stacksize (int new_stacksize = 0)
2920 PROTOTYPE: ;$
2921 CODE:
2922 RETVAL = cctx_stacksize;
2923 if (new_stacksize)
2924 {
2925 cctx_stacksize = new_stacksize;
2926 ++cctx_gen;
2927 }
2928 OUTPUT:
2929 RETVAL
2930
2931int
2932cctx_max_idle (int max_idle = 0)
2933 PROTOTYPE: ;$
2934 CODE:
2935 RETVAL = cctx_max_idle;
2936 if (max_idle > 1)
2937 cctx_max_idle = max_idle;
2938 OUTPUT:
2939 RETVAL
2940
2941int
2942cctx_count ()
2943 PROTOTYPE:
2944 CODE:
2945 RETVAL = cctx_count;
2946 OUTPUT:
2947 RETVAL
2948
2949int
2950cctx_idle ()
2951 PROTOTYPE:
2952 CODE:
2953 RETVAL = cctx_idle;
2954 OUTPUT:
2955 RETVAL
2956
2957void
2958list ()
2959 PROTOTYPE:
2960 PPCODE:
2961{
2962 struct coro *coro;
2963 for (coro = coro_first; coro; coro = coro->next)
2964 if (coro->hv)
2965 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2966}
2967
2968void
2969call (Coro::State coro, SV *coderef)
2970 ALIAS:
2971 eval = 1
2972 CODE:
2973{
2974 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
955 { 2975 {
956 struct coro temp; 2976 struct coro temp;
957 2977
2978 if (!(coro->flags & CF_RUNNING))
2979 {
2980 PUTBACK;
2981 save_perl (aTHX_ &temp);
2982 load_perl (aTHX_ coro);
2983 }
2984
2985 {
2986 dSP;
2987 ENTER;
2988 SAVETMPS;
958 PUTBACK; 2989 PUTBACK;
959 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2990 PUSHSTACK;
960 LOAD(aTHX_ coro); 2991 PUSHMARK (SP);
2992
2993 if (ix)
2994 eval_sv (coderef, 0);
2995 else
2996 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2997
2998 POPSTACK;
961 SPAGAIN; 2999 SPAGAIN;
3000 FREETMPS;
3001 LEAVE;
3002 PUTBACK;
3003 }
962 3004
963 destroy_stacks (aTHX); 3005 if (!(coro->flags & CF_RUNNING))
964 3006 {
965 LOAD((&temp)); /* this will get rid of defsv etc.. */ 3007 save_perl (aTHX_ coro);
3008 load_perl (aTHX_ &temp);
966 SPAGAIN; 3009 SPAGAIN;
967 3010 }
968 coro->mainstack = 0;
969 } 3011 }
3012}
970 3013
971 deallocate_stack (coro); 3014SV *
972 3015is_ready (Coro::State coro)
973 Safefree (coro); 3016 PROTOTYPE: $
3017 ALIAS:
3018 is_ready = CF_READY
3019 is_running = CF_RUNNING
3020 is_new = CF_NEW
3021 is_destroyed = CF_DESTROYED
3022 CODE:
3023 RETVAL = boolSV (coro->flags & ix);
3024 OUTPUT:
3025 RETVAL
974 3026
975void 3027void
976flush() 3028throw (Coro::State self, SV *throw = &PL_sv_undef)
977 CODE: 3029 PROTOTYPE: $;$
978#ifdef MAY_FLUSH 3030 CODE:
979 flush_padlist_cache (); 3031{
980#endif 3032 struct coro *current = SvSTATE_current;
3033 SV **throwp = self == current ? &CORO_THROW : &self->except;
3034 SvREFCNT_dec (*throwp);
3035 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3036}
981 3037
982void 3038void
983_exit(code) 3039api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
984 int code 3040 PROTOTYPE: $;$
3041 C_ARGS: aTHX_ coro, flags
3042
3043SV *
3044has_cctx (Coro::State coro)
985 PROTOTYPE: $ 3045 PROTOTYPE: $
986 CODE: 3046 CODE:
987#if defined(__GLIBC__) || _POSIX_C_SOURCE 3047 /* maybe manage the running flag differently */
988 _exit (code); 3048 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
989#else 3049 OUTPUT:
990 signal (SIGTERM, SIG_DFL); 3050 RETVAL
991 raise (SIGTERM);
992 exit (code);
993#endif
994 3051
995MODULE = Coro::State PACKAGE = Coro::Cont 3052int
3053is_traced (Coro::State coro)
3054 PROTOTYPE: $
3055 CODE:
3056 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3057 OUTPUT:
3058 RETVAL
996 3059
997# this is slightly dirty (should expose a c-level api) 3060UV
3061rss (Coro::State coro)
3062 PROTOTYPE: $
3063 ALIAS:
3064 usecount = 1
3065 CODE:
3066 switch (ix)
3067 {
3068 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3069 case 1: RETVAL = coro->usecount; break;
3070 }
3071 OUTPUT:
3072 RETVAL
998 3073
999void 3074void
1000yield(...) 3075force_cctx ()
3076 PROTOTYPE:
3077 CODE:
3078 cctx_current->idle_sp = 0;
3079
3080void
3081swap_defsv (Coro::State self)
1001 PROTOTYPE: @ 3082 PROTOTYPE: $
3083 ALIAS:
3084 swap_defav = 1
1002 CODE: 3085 CODE:
1003 static SV *returnstk; 3086 if (!self->slot)
1004 SV *sv; 3087 croak ("cannot swap state with coroutine that has no saved state,");
1005 AV *defav = GvAV (PL_defgv); 3088 else
1006 struct coro *prev, *next; 3089 {
3090 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3091 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1007 3092
1008 if (!returnstk) 3093 SV *tmp = *src; *src = *dst; *dst = tmp;
1009 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3094 }
1010 3095
1011 /* set up @_ -- ugly */
1012 av_clear (defav);
1013 av_fill (defav, items - 1);
1014 while (items--)
1015 av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018 sv = av_pop ((AV *)SvRV (returnstk));
1019 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1020 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1021 SvREFCNT_dec (sv);
1022
1023 transfer(aTHX_ prev, next, 0);
1024 3096
1025MODULE = Coro::State PACKAGE = Coro 3097MODULE = Coro::State PACKAGE = Coro
1026 3098
1027# this is slightly dirty (should expose a c-level api)
1028
1029BOOT: 3099BOOT:
1030{ 3100{
1031 int i; 3101 int i;
3102
3103 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3104 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3105 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3106 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3107 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3108 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3109 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3110 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3111 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3112
3113 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3114 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3115 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3116 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3117
1032 HV *stash = gv_stashpv ("Coro", TRUE); 3118 coro_stash = gv_stashpv ("Coro", TRUE);
1033 3119
1034 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3120 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3121 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3122 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3123 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3124 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3125 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040
1041 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1042 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1043 3126
1044 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3127 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045 coro_ready[i] = newAV (); 3128 coro_ready[i] = newAV ();
1046 3129
1047 { 3130 {
1048 SV *sv = perl_get_sv("Coro::API", 1); 3131 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1049 3132
1050 coroapi.schedule = api_schedule; 3133 coroapi.schedule = api_schedule;
3134 coroapi.schedule_to = api_schedule_to;
1051 coroapi.cede = api_cede; 3135 coroapi.cede = api_cede;
3136 coroapi.cede_notself = api_cede_notself;
1052 coroapi.ready = api_ready; 3137 coroapi.ready = api_ready;
3138 coroapi.is_ready = api_is_ready;
1053 coroapi.nready = &coro_nready; 3139 coroapi.nready = coro_nready;
1054 coroapi.current = coro_current; 3140 coroapi.current = coro_current;
1055 3141
1056 GCoroAPI = &coroapi; 3142 /*GCoroAPI = &coroapi;*/
1057 sv_setiv(sv, (IV)&coroapi); 3143 sv_setiv (sv, (IV)&coroapi);
1058 SvREADONLY_on(sv); 3144 SvREADONLY_on (sv);
1059 } 3145 }
1060} 3146}
1061 3147
1062void 3148void
1063ready(self) 3149terminate (...)
1064 SV * self 3150 CODE:
3151 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3152
3153void
3154schedule (...)
3155 CODE:
3156 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3157
3158void
3159schedule_to (...)
3160 CODE:
3161 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3162
3163void
3164cede_to (...)
3165 CODE:
3166 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3167
3168void
3169cede (...)
3170 CODE:
3171 CORO_EXECUTE_SLF_XS (slf_init_cede);
3172
3173void
3174cede_notself (...)
3175 CODE:
3176 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3177
3178void
3179_cancel (Coro::State self)
3180 CODE:
3181 coro_state_destroy (aTHX_ self);
3182 coro_call_on_destroy (aTHX_ self);
3183
3184void
3185_set_current (SV *current)
1065 PROTOTYPE: $ 3186 PROTOTYPE: $
1066 CODE: 3187 CODE:
1067 api_ready (self); 3188 SvREFCNT_dec (SvRV (coro_current));
3189 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3190
3191void
3192_set_readyhook (SV *hook)
3193 PROTOTYPE: $
3194 CODE:
3195 SvREFCNT_dec (coro_readyhook);
3196 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1068 3197
1069int 3198int
3199prio (Coro::State coro, int newprio = 0)
3200 PROTOTYPE: $;$
3201 ALIAS:
3202 nice = 1
3203 CODE:
3204{
3205 RETVAL = coro->prio;
3206
3207 if (items > 1)
3208 {
3209 if (ix)
3210 newprio = coro->prio - newprio;
3211
3212 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3213 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3214
3215 coro->prio = newprio;
3216 }
3217}
3218 OUTPUT:
3219 RETVAL
3220
3221SV *
3222ready (SV *self)
3223 PROTOTYPE: $
3224 CODE:
3225 RETVAL = boolSV (api_ready (aTHX_ self));
3226 OUTPUT:
3227 RETVAL
3228
3229int
1070nready(...) 3230nready (...)
1071 PROTOTYPE: 3231 PROTOTYPE:
1072 CODE: 3232 CODE:
1073 RETVAL = coro_nready; 3233 RETVAL = coro_nready;
1074 OUTPUT: 3234 OUTPUT:
1075 RETVAL 3235 RETVAL
1076 3236
1077void 3237void
1078schedule(...) 3238_pool_handler (...)
1079 PROTOTYPE:
1080 CODE: 3239 CODE:
1081 api_schedule (); 3240 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1082 3241
1083void 3242void
1084cede(...) 3243async_pool (SV *cv, ...)
1085 PROTOTYPE: 3244 PROTOTYPE: &@
3245 PPCODE:
3246{
3247 HV *hv = (HV *)av_pop (av_async_pool);
3248 AV *av = newAV ();
3249 SV *cb = ST (0);
3250 int i;
3251
3252 av_extend (av, items - 2);
3253 for (i = 1; i < items; ++i)
3254 av_push (av, SvREFCNT_inc_NN (ST (i)));
3255
3256 if ((SV *)hv == &PL_sv_undef)
3257 {
3258 PUSHMARK (SP);
3259 EXTEND (SP, 2);
3260 PUSHs (sv_Coro);
3261 PUSHs ((SV *)cv_pool_handler);
3262 PUTBACK;
3263 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3264 SPAGAIN;
3265
3266 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3267 }
3268
3269 {
3270 struct coro *coro = SvSTATE_hv (hv);
3271
3272 assert (!coro->invoke_cb);
3273 assert (!coro->invoke_av);
3274 coro->invoke_cb = SvREFCNT_inc (cb);
3275 coro->invoke_av = av;
3276 }
3277
3278 api_ready (aTHX_ (SV *)hv);
3279
3280 if (GIMME_V != G_VOID)
3281 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3282 else
3283 SvREFCNT_dec (hv);
3284}
3285
3286SV *
3287rouse_cb ()
3288 PROTOTYPE:
1086 CODE: 3289 CODE:
3290 RETVAL = coro_new_rouse_cb (aTHX);
3291 OUTPUT:
3292 RETVAL
3293
3294void
3295rouse_wait (...)
3296 PROTOTYPE: ;$
3297 PPCODE:
3298 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3299
3300
3301MODULE = Coro::State PACKAGE = PerlIO::cede
3302
3303BOOT:
3304 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3305
3306
3307MODULE = Coro::State PACKAGE = Coro::Semaphore
3308
3309SV *
3310new (SV *klass, SV *count = 0)
3311 CODE:
3312 RETVAL = sv_bless (
3313 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3314 GvSTASH (CvGV (cv))
3315 );
3316 OUTPUT:
3317 RETVAL
3318
3319# helper for Coro::Channel
3320SV *
3321_alloc (int count)
3322 CODE:
3323 RETVAL = coro_waitarray_new (aTHX_ count);
3324 OUTPUT:
3325 RETVAL
3326
3327SV *
3328count (SV *self)
3329 CODE:
3330 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3331 OUTPUT:
3332 RETVAL
3333
3334void
3335up (SV *self, int adjust = 1)
3336 ALIAS:
3337 adjust = 1
3338 CODE:
3339 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3340
3341void
3342down (...)
3343 CODE:
3344 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3345
3346void
3347wait (...)
3348 CODE:
3349 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3350
3351void
3352try (SV *self)
3353 PPCODE:
3354{
3355 AV *av = (AV *)SvRV (self);
3356 SV *count_sv = AvARRAY (av)[0];
3357 IV count = SvIVX (count_sv);
3358
3359 if (count > 0)
3360 {
3361 --count;
3362 SvIVX (count_sv) = count;
3363 XSRETURN_YES;
3364 }
3365 else
3366 XSRETURN_NO;
3367}
3368
3369void
3370waiters (SV *self)
3371 PPCODE:
3372{
3373 AV *av = (AV *)SvRV (self);
3374 int wcount = AvFILLp (av) + 1 - 1;
3375
3376 if (GIMME_V == G_SCALAR)
3377 XPUSHs (sv_2mortal (newSViv (wcount)));
3378 else
3379 {
3380 int i;
3381 EXTEND (SP, wcount);
3382 for (i = 1; i <= wcount; ++i)
3383 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3384 }
3385}
3386
3387MODULE = Coro::State PACKAGE = Coro::Signal
3388
3389SV *
3390new (SV *klass)
3391 CODE:
3392 RETVAL = sv_bless (
3393 coro_waitarray_new (aTHX_ 0),
3394 GvSTASH (CvGV (cv))
3395 );
3396 OUTPUT:
3397 RETVAL
3398
3399void
3400wait (...)
3401 CODE:
3402 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3403
3404void
3405broadcast (SV *self)
3406 CODE:
3407{
3408 AV *av = (AV *)SvRV (self);
3409 coro_signal_wake (aTHX_ av, AvFILLp (av));
3410}
3411
3412void
3413send (SV *self)
3414 CODE:
3415{
3416 AV *av = (AV *)SvRV (self);
3417
3418 if (AvFILLp (av))
3419 coro_signal_wake (aTHX_ av, 1);
3420 else
3421 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3422}
3423
3424IV
3425awaited (SV *self)
3426 CODE:
3427 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3428 OUTPUT:
3429 RETVAL
3430
3431
3432MODULE = Coro::State PACKAGE = Coro::AnyEvent
3433
3434BOOT:
3435 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3436
3437void
3438_schedule (...)
3439 CODE:
3440{
3441 static int incede;
3442
1087 api_cede (); 3443 api_cede_notself (aTHX);
1088 3444
3445 ++incede;
3446 while (coro_nready >= incede && api_cede (aTHX))
3447 ;
3448
3449 sv_setsv (sv_activity, &PL_sv_undef);
3450 if (coro_nready >= incede)
3451 {
3452 PUSHMARK (SP);
3453 PUTBACK;
3454 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3455 }
3456
3457 --incede;
3458}
3459
3460
3461MODULE = Coro::State PACKAGE = Coro::AIO
3462
3463void
3464_register (char *target, char *proto, SV *req)
3465 CODE:
3466{
3467 CV *req_cv = coro_sv_2cv (aTHX_ req);
3468 /* newXSproto doesn't return the CV on 5.8 */
3469 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3470 sv_setpv ((SV *)slf_cv, proto);
3471 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3472}
3473

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