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Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.309 by root, Wed Nov 19 15:29:57 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) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
30 131
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 133
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
34 148
35#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
36 151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
155# endif
156#endif
157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static CV *coro_run_cv;
171static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 172
39/* this is actually not only the c stack but also c registers etc... */ 173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
186
187static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle;
189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
199/* this is a structure representing a c-level coroutine */
40typedef struct { 200typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 201{
42 int usecnt; /* shared by how many coroutines */ 202 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 203
204 /* the stack */
205 void *sptr;
206 size_t ssize;
207
208 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env;
45 coro_context cctx; 212 coro_context cctx;
46 213
47 void *sptr; 214 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 215#if CORO_USE_VALGRIND
49} coro_stack; 216 int valgrind_id;
217#endif
218 unsigned char flags;
219} coro_cctx;
50 220
221enum {
222 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
226};
227
228/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct
230{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
51struct coro { 243struct coro {
52 /* the optional C context */ 244 /* the C coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 245 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 246
57 /* optionally saved, might be zero */ 247 /* state data */
58 AV *defav; 248 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; 249 AV *mainstack;
70 SV **stack_sp; 250 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 PMOP *curpm;
93 JMPENV *top_env;
94 251
252 CV *startcv; /* the CV to execute */
95 /* data associated with this coroutine (initial args) */ 253 AV *args; /* data associated with this coroutine (initial args) */
96 AV *args; 254 int refcnt; /* coroutines are refcounted, yes */
255 int flags; /* CF_ flags */
256 HV *hv; /* the perl hash associated with this coro, if any */
257 void (*on_destroy)(pTHX_ struct coro *coro);
258
259 /* statistics */
260 int usecount; /* number of transfers to this coro */
261
262 /* coro process data */
263 int prio;
264 SV *except; /* exception to be thrown */
265 SV *rouse_cb;
266
267 /* async_pool */
268 SV *saved_deffh;
269
270 /* linked list */
271 struct coro *next, *prev;
97}; 272};
98 273
99typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
101 276
102static AV *main_mainstack; /* used to differentiate between $main and others */ 277/* the following variables are effectively part of the perl context */
103static HV *coro_state_stash; 278/* and get copied between struct coro and these variables */
104static SV *ucoro_state_sv; 279/* the mainr easonw e don't support windows process emulation */
105static U32 ucoro_state_hash; 280static struct CoroSLF slf_frame; /* the current slf frame */
106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
108
109/* mostly copied from op.c:cv_clone2 */
110STATIC AV *
111clone_padlist (AV *protopadlist)
112{
113 AV *av;
114 I32 ix;
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117 SV **pname = AvARRAY (protopad_name);
118 SV **ppad = AvARRAY (protopad);
119 I32 fname = AvFILLp (protopad_name);
120 I32 fpad = AvFILLp (protopad);
121 AV *newpadlist, *newpad_name, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131
132 newpadlist = newAV ();
133 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name);
135 av_store (newpadlist, 1, (SV *) newpad);
136
137 av = newAV (); /* will be @_ */
138 av_extend (av, 0);
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141
142 for (ix = fpad; ix > 0; ix--)
143 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
145 if (namesv && namesv != &PL_sv_undef)
146 {
147 char *name = SvPVX (namesv); /* XXX */
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 }
152 else
153 { /* our own lexical */
154 SV *sv;
155 if (*name == '&')
156 sv = SvREFCNT_inc (ppad[ix]);
157 else if (*name == '@')
158 sv = (SV *) newAV ();
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 }
167 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC void
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist);
220 }
221}
222#endif
223
224/* the next two functions merely cache the padlists */
225STATIC void
226get_padlist (CV *cv)
227{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230 if (he && AvFILLp ((AV *)*he) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 {
243 SvREFCNT_dec (*he);
244 *he = (SV *)newAV ();
245 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248}
249
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) load_state(aTHX_ (state));
280#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void
285load_state(pTHX_ Coro__State c)
286{
287 PL_dowarn = c->dowarn;
288 PL_in_eval = c->in_eval;
289
290 PL_curstackinfo = c->curstackinfo;
291 PL_curstack = c->curstack;
292 PL_mainstack = c->mainstack;
293 PL_stack_sp = c->stack_sp;
294 PL_op = c->op;
295 PL_curpad = c->curpad;
296 PL_stack_base = c->stack_base;
297 PL_stack_max = c->stack_max;
298 PL_tmps_stack = c->tmps_stack;
299 PL_tmps_floor = c->tmps_floor;
300 PL_tmps_ix = c->tmps_ix;
301 PL_tmps_max = c->tmps_max;
302 PL_markstack = c->markstack;
303 PL_markstack_ptr = c->markstack_ptr;
304 PL_markstack_max = c->markstack_max;
305 PL_scopestack = c->scopestack;
306 PL_scopestack_ix = c->scopestack_ix;
307 PL_scopestack_max = c->scopestack_max;
308 PL_savestack = c->savestack;
309 PL_savestack_ix = c->savestack_ix;
310 PL_savestack_max = c->savestack_max;
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314 PL_curcop = c->curcop;
315 PL_top_env = c->top_env;
316
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320
321 {
322 dSP;
323 CV *cv;
324
325 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs))
327 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist;
334#ifdef USE_THREADS
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 }
341
342 PUTBACK;
343 }
344}
345
346static void
347save_state(pTHX_ Coro__State c, int flags)
348{
349 {
350 dSP;
351 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo;
354
355 /*
356 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :(
358 */
359
360 PUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */
362 for (;;)
363 {
364 while (cxix >= 0)
365 {
366 PERL_CONTEXT *cx = &ccstk[cxix--];
367
368 if (CxTYPE(cx) == CXt_SUB)
369 {
370 CV *cv = cx->blk_sub.cv;
371 if (CvDEPTH(cv))
372 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv));
388 PUSHs ((SV *)cv);
389
390 get_padlist (cv); /* this is a monster */
391 }
392 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 }
400
401 if (top_si->si_type == PERLSI_MAIN)
402 break;
403
404 top_si = top_si->si_prev;
405 ccstk = top_si->si_cxstack;
406 cxix = top_si->si_cxix;
407 }
408
409 PUTBACK;
410 }
411
412 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
415
416 c->dowarn = PL_dowarn;
417 c->in_eval = PL_in_eval;
418
419 c->curstackinfo = PL_curstackinfo;
420 c->curstack = PL_curstack;
421 c->mainstack = PL_mainstack;
422 c->stack_sp = PL_stack_sp;
423 c->op = PL_op;
424 c->curpad = PL_curpad;
425 c->stack_base = PL_stack_base;
426 c->stack_max = PL_stack_max;
427 c->tmps_stack = PL_tmps_stack;
428 c->tmps_floor = PL_tmps_floor;
429 c->tmps_ix = PL_tmps_ix;
430 c->tmps_max = PL_tmps_max;
431 c->markstack = PL_markstack;
432 c->markstack_ptr = PL_markstack_ptr;
433 c->markstack_max = PL_markstack_max;
434 c->scopestack = PL_scopestack;
435 c->scopestack_ix = PL_scopestack_ix;
436 c->scopestack_max = PL_scopestack_max;
437 c->savestack = PL_savestack;
438 c->savestack_ix = PL_savestack_ix;
439 c->savestack_max = PL_savestack_max;
440 c->retstack = PL_retstack;
441 c->retstack_ix = PL_retstack_ix;
442 c->retstack_max = PL_retstack_max;
443 c->curcop = PL_curcop;
444 c->top_env = PL_top_env;
445}
446
447/*
448 * allocate various perl stacks. This is an exact copy
449 * of perl.c:init_stacks, except that it uses less memory
450 * on the assumption that coroutines do not usually need
451 * a lot of stackspace.
452 */
453STATIC void
454coro_init_stacks (pTHX)
455{
456 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
457 PL_curstackinfo->si_type = PERLSI_MAIN;
458 PL_curstack = PL_curstackinfo->si_stack;
459 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460
461 PL_stack_base = AvARRAY(PL_curstack);
462 PL_stack_sp = PL_stack_base;
463 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464
465 New(50,PL_tmps_stack,96,SV*);
466 PL_tmps_floor = -1;
467 PL_tmps_ix = -1;
468 PL_tmps_max = 96;
469
470 New(54,PL_markstack,16,I32);
471 PL_markstack_ptr = PL_markstack;
472 PL_markstack_max = PL_markstack + 16;
473
474 SET_MARK_OFFSET;
475
476 New(54,PL_scopestack,16,I32);
477 PL_scopestack_ix = 0;
478 PL_scopestack_max = 16;
479
480 New(54,PL_savestack,96,ANY);
481 PL_savestack_ix = 0;
482 PL_savestack_max = 96;
483
484 New(54,PL_retstack,8,OP*);
485 PL_retstack_ix = 0;
486 PL_retstack_max = 8;
487}
488
489/*
490 * destroy the stacks, the callchain etc...
491 * still there is a memleak of 128 bytes...
492 */
493STATIC void
494destroy_stacks(pTHX)
495{
496 if (!IN_DESTRUCT)
497 {
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505 }
506
507 while (PL_curstackinfo->si_next)
508 PL_curstackinfo = PL_curstackinfo->si_next;
509
510 while (PL_curstackinfo)
511 {
512 PERL_SI *p = PL_curstackinfo->si_prev;
513
514 {
515 dSP;
516 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517 PUTBACK; /* possibly superfluous */
518 }
519
520 if (!IN_DESTRUCT)
521 {
522 dounwind(-1);
523 SvREFCNT_dec(PL_curstackinfo->si_stack);
524 }
525
526 Safefree(PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo);
528 PL_curstackinfo = p;
529 }
530
531 Safefree(PL_tmps_stack);
532 Safefree(PL_markstack);
533 Safefree(PL_scopestack);
534 Safefree(PL_savestack);
535 Safefree(PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#if HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif
555 {
556 /*FIXME*//*D*//* reasonable stack size! */
557 stack->ssize = -4096 * sizeof (long);
558 New (0, stack->sptr, 4096, long);
559 }
560 }
561 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 {
578#ifdef HAVE_MMAP
579 if (stack->ssize > 0 && stack->sptr)
580 munmap (stack->sptr, stack->ssize);
581 else
582#else
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 }
587 else if (ctx->gencnt == stack->gencnt)
588 --stack->usecnt;
589 }
590}
591
592static void
593setup_coro (void *arg)
594{
595 /*
596 * emulate part of the perl startup here.
597 */
598 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601
602 coro_init_stacks (aTHX);
603 PL_curpm = 0; /* segfault on first access */
604 /*PL_curcop = 0;*/
605 /*PL_in_eval = PL_in_eval;*/ /* inherit */
606 SvREFCNT_dec (GvAV (PL_defgv));
607 GvAV (PL_defgv) = ctx->args;
608
609 SPAGAIN;
610
611 if (ctx->stack)
612 {
613 ctx->cursp = 0;
614
615 PUSHMARK(SP);
616 PUTBACK;
617 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
618
619 if (SvTRUE (ERRSV))
620 croak (NULL);
621 else
622 croak ("FATAL: CCTXT coroutine returned!");
623 }
624 else
625 {
626 UNOP myop;
627
628 PL_op = (OP *)&myop;
629
630 Zero(&myop, 1, UNOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK(SP);
635 XPUSHs (sub_init);
636 /*
637 * the next line is slightly wrong, as PL_op->op_next
638 * is actually being executed so we skip the first op.
639 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;)
642 */
643 PUTBACK;
644 PL_op = pp_entersub();
645 SPAGAIN;
646
647 ENTER; /* necessary e.g. for dounwind */
648 }
649}
650
651static void
652continue_coro (void *arg)
653{
654 /*
655 * this is a _very_ stripped down perl interpreter ;)
656 */
657 Coro__State ctx = (Coro__State)arg;
658 JMPENV coro_start_env;
659
660 /* same as JMPENV_BOOTSTRAP */
661 Zero(&coro_start_env, 1, JMPENV);
662 coro_start_env.je_ret = -1;
663 coro_start_env.je_mustcatch = TRUE;
664 PL_top_env = &coro_start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677 static struct coro *xnext;
678
679 if (prev != next)
680 {
681 xnext = next;
682
683 if (next->mainstack)
684 {
685 SAVE (prev, flags);
686 LOAD (next);
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 {
695 if (!prev->stack)
696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
716 }
717
718 }
719 else if (next->tmps_ix == -2)
720 croak ("tried to transfer to running coroutine");
721 else
722 {
723 SAVE (prev, -1); /* first get rid of the old state */
724
725 if (flags & TRANSFER_SAVE_CCTXT)
726 {
727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731 {
732 setup_coro (next);
733
734 prev->stack->refcnt++;
735 prev->stack->usecnt++;
736 next->stack = prev->stack;
737 next->gencnt = prev->gencnt;
738 }
739 else
740 {
741 allocate_stack (next, 1);
742 coro_create (&(next->stack->cctx),
743 setup_coro, (void *)next,
744 next->stack->sptr, labs (next->stack->ssize));
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746 /* don't add any code here */
747 }
748 }
749 else
750 setup_coro (next);
751 }
752
753 /*
754 * xnext is now either prev or next, depending on wether
755 * we switched the c stack or not. that's why i use a global
756 * variable, that should become thread-specific at one point.
757 */
758 xnext->cursp = stacklevel;
759 }
760
761 if (coro_mortal)
762 {
763 SvREFCNT_dec (coro_mortal);
764 coro_mortal = 0;
765 }
766}
767
768#define SV_CORO(sv,func) \
769 do { \
770 if (SvROK (sv)) \
771 sv = SvRV (sv); \
772 \
773 if (SvTYPE(sv) == SVt_PVHV) \
774 { \
775 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
776 \
777 if (!he) \
778 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
779 \
780 (sv) = SvRV (HeVAL(he)); \
781 } \
782 \
783 /* must also be changed inside Coro::Cont::yield */ \
784 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
785 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
786 \
787 } while(0)
788
789#define SvSTATE(sv) (struct coro *)SvIV (sv)
790
791static void
792api_transfer(pTHX_ SV *prev, SV *next, int flags)
793{
794 SV_CORO (prev, "Coro::transfer");
795 SV_CORO (next, "Coro::transfer");
796
797 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
798}
799 281
800/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
801 283
802#define PRIO_MAX 3 284#define PRIO_MAX 3
803#define PRIO_HIGH 1 285#define PRIO_HIGH 1
… …
805#define PRIO_LOW -1 287#define PRIO_LOW -1
806#define PRIO_IDLE -3 288#define PRIO_IDLE -3
807#define PRIO_MIN -4 289#define PRIO_MIN -4
808 290
809/* for Coro.pm */ 291/* for Coro.pm */
810static GV *coro_current, *coro_idle; 292static SV *coro_current;
293static SV *coro_readyhook;
811static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 294static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
812static int coro_nready; 295static struct coro *coro_first;
296#define coro_nready coroapi.nready
813 297
814static void 298/** lowlevel stuff **********************************************************/
815coro_enq (SV *sv)
816{
817 if (SvTYPE (sv) == SVt_PVHV)
818 {
819 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
820 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
821
822 prio = prio > PRIO_MAX ? PRIO_MAX
823 : prio < PRIO_MIN ? PRIO_MIN
824 : prio;
825
826 av_push (coro_ready [prio - PRIO_MIN], sv);
827 coro_nready++;
828
829 return;
830 }
831
832 croak ("Coro::ready tried to enqueue something that is not a coroutine");
833}
834 299
835static SV * 300static SV *
836coro_deq (int min_prio) 301coro_get_sv (pTHX_ const char *name, int create)
837{ 302{
838 int prio = PRIO_MAX - PRIO_MIN; 303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_sv (name, create);
306#endif
307 return get_sv (name, create);
308}
839 309
840 min_prio -= PRIO_MIN; 310static AV *
841 if (min_prio < 0) 311coro_get_av (pTHX_ const char *name, int create)
842 min_prio = 0; 312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_av (name, create);
316#endif
317 return get_av (name, create);
318}
843 319
844 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 320static HV *
845 if (av_len (coro_ready[prio]) >= 0) 321coro_get_hv (pTHX_ const char *name, int create)
322{
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_hv (name, create);
326#endif
327 return get_hv (name, create);
328}
329
330/* may croak */
331INLINE CV *
332coro_sv_2cv (SV *sv)
333{
334 HV *st;
335 GV *gvp;
336 return sv_2cv (sv, &st, &gvp, 0);
337}
338
339static AV *
340coro_clone_padlist (pTHX_ CV *cv)
341{
342 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad;
344
345 newpadlist = newAV ();
346 AvREAL_off (newpadlist);
347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist);
354
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
356 av_store (newpadlist, 1, (SV *)newpad);
357
358 return newpadlist;
359}
360
361static void
362free_padlist (pTHX_ AV *padlist)
363{
364 /* may be during global destruction */
365 if (SvREFCNT (padlist))
366 {
367 I32 i = AvFILLp (padlist);
368 while (i >= 0)
846 { 369 {
847 coro_nready--; 370 SV **svp = av_fetch (padlist, i--, FALSE);
848 return av_shift (coro_ready[prio]); 371 if (svp)
372 {
373 SV *sv;
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
375 SvREFCNT_dec (sv);
376
377 SvREFCNT_dec (*svp);
378 }
849 } 379 }
380
381 SvREFCNT_dec ((SV*)padlist);
382 }
383}
384
385static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{
388 AV *padlist;
389 AV *av = (AV *)mg->mg_obj;
390
391 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist);
394
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
850 396
851 return 0; 397 return 0;
852} 398}
853 399
854static void 400#define CORO_MAGIC_type_cv 26
855api_ready (SV *coro) 401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402
403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC_NN(sv, type) \
409 (expect_true (SvMAGIC (sv)->mg_type == type) \
410 ? SvMAGIC (sv) \
411 : mg_find (sv, type))
412
413#define CORO_MAGIC(sv, type) \
414 (expect_true (SvMAGIC (sv)) \
415 ? CORO_MAGIC_NN (sv, type) \
416 : 0)
417
418#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
419#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
420
421INLINE struct coro *
422SvSTATE_ (pTHX_ SV *coro)
856{ 423{
424 HV *stash;
425 MAGIC *mg;
426
857 if (SvROK (coro)) 427 if (SvROK (coro))
858 coro = SvRV (coro); 428 coro = SvRV (coro);
859 429
860 coro_enq (SvREFCNT_inc (coro)); 430 if (expect_false (SvTYPE (coro) != SVt_PVHV))
861} 431 croak ("Coro::State object required");
862 432
433 stash = SvSTASH (coro);
434 if (expect_false (stash != coro_stash && stash != coro_state_stash))
435 {
436 /* very slow, but rare, check */
437 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
438 croak ("Coro::State object required");
439 }
440
441 mg = CORO_MAGIC_state (coro);
442 return (struct coro *)mg->mg_ptr;
443}
444
445#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
446
447/* faster than SvSTATE, but expects a coroutine hv */
448#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
449#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
450
451/* the next two functions merely cache the padlists */
452static void
453get_padlist (pTHX_ CV *cv)
454{
455 MAGIC *mg = CORO_MAGIC_cv (cv);
456 AV *av;
457
458 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
459 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
460 else
461 {
462#if CORO_PREFER_PERL_FUNCTIONS
463 /* this is probably cleaner? but also slower! */
464 /* in practise, it seems to be less stable */
465 CV *cp = Perl_cv_clone (aTHX_ cv);
466 CvPADLIST (cv) = CvPADLIST (cp);
467 CvPADLIST (cp) = 0;
468 SvREFCNT_dec (cp);
469#else
470 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
471#endif
472 }
473}
474
475static void
476put_padlist (pTHX_ CV *cv)
477{
478 MAGIC *mg = CORO_MAGIC_cv (cv);
479 AV *av;
480
481 if (expect_false (!mg))
482 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
483
484 av = (AV *)mg->mg_obj;
485
486 if (expect_false (AvFILLp (av) >= AvMAX (av)))
487 av_extend (av, AvMAX (av) + 1);
488
489 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
490}
491
492/** load & save, init *******************************************************/
493
494static void
495load_perl (pTHX_ Coro__State c)
496{
497 perl_slots *slot = c->slot;
498 c->slot = 0;
499
500 PL_mainstack = c->mainstack;
501
502 GvSV (PL_defgv) = slot->defsv;
503 GvAV (PL_defgv) = slot->defav;
504 GvSV (PL_errgv) = slot->errsv;
505 GvSV (irsgv) = slot->irsgv;
506
507 #define VAR(name,type) PL_ ## name = slot->name;
508 # include "state.h"
509 #undef VAR
510
511 {
512 dSP;
513
514 CV *cv;
515
516 /* now do the ugly restore mess */
517 while (expect_true (cv = (CV *)POPs))
518 {
519 put_padlist (aTHX_ cv); /* mark this padlist as available */
520 CvDEPTH (cv) = PTR2IV (POPs);
521 CvPADLIST (cv) = (AV *)POPs;
522 }
523
524 PUTBACK;
525 }
526
527 slf_frame = c->slf_frame;
528 CORO_THROW = c->except;
529}
530
531static void
532save_perl (pTHX_ Coro__State c)
533{
534 c->except = CORO_THROW;
535 c->slf_frame = slf_frame;
536
537 {
538 dSP;
539 I32 cxix = cxstack_ix;
540 PERL_CONTEXT *ccstk = cxstack;
541 PERL_SI *top_si = PL_curstackinfo;
542
543 /*
544 * the worst thing you can imagine happens first - we have to save
545 * (and reinitialize) all cv's in the whole callchain :(
546 */
547
548 XPUSHs (Nullsv);
549 /* this loop was inspired by pp_caller */
550 for (;;)
551 {
552 while (expect_true (cxix >= 0))
553 {
554 PERL_CONTEXT *cx = &ccstk[cxix--];
555
556 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
557 {
558 CV *cv = cx->blk_sub.cv;
559
560 if (expect_true (CvDEPTH (cv)))
561 {
562 EXTEND (SP, 3);
563 PUSHs ((SV *)CvPADLIST (cv));
564 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
565 PUSHs ((SV *)cv);
566
567 CvDEPTH (cv) = 0;
568 get_padlist (aTHX_ cv);
569 }
570 }
571 }
572
573 if (expect_true (top_si->si_type == PERLSI_MAIN))
574 break;
575
576 top_si = top_si->si_prev;
577 ccstk = top_si->si_cxstack;
578 cxix = top_si->si_cxix;
579 }
580
581 PUTBACK;
582 }
583
584 /* allocate some space on the context stack for our purposes */
585 /* we manually unroll here, as usually 2 slots is enough */
586 if (SLOT_COUNT >= 1) CXINC;
587 if (SLOT_COUNT >= 2) CXINC;
588 if (SLOT_COUNT >= 3) CXINC;
589 {
590 int i;
591 for (i = 3; i < SLOT_COUNT; ++i)
592 CXINC;
593 }
594 cxstack_ix -= SLOT_COUNT; /* undo allocation */
595
596 c->mainstack = PL_mainstack;
597
598 {
599 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
600
601 slot->defav = GvAV (PL_defgv);
602 slot->defsv = DEFSV;
603 slot->errsv = ERRSV;
604 slot->irsgv = GvSV (irsgv);
605
606 #define VAR(name,type) slot->name = PL_ ## name;
607 # include "state.h"
608 #undef VAR
609 }
610}
611
612/*
613 * allocate various perl stacks. This is almost an exact copy
614 * of perl.c:init_stacks, except that it uses less memory
615 * on the (sometimes correct) assumption that coroutines do
616 * not usually need a lot of stackspace.
617 */
618#if CORO_PREFER_PERL_FUNCTIONS
619# define coro_init_stacks(thx) init_stacks ()
620#else
621static void
622coro_init_stacks (pTHX)
623{
624 PL_curstackinfo = new_stackinfo(32, 8);
625 PL_curstackinfo->si_type = PERLSI_MAIN;
626 PL_curstack = PL_curstackinfo->si_stack;
627 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
628
629 PL_stack_base = AvARRAY(PL_curstack);
630 PL_stack_sp = PL_stack_base;
631 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
632
633 New(50,PL_tmps_stack,32,SV*);
634 PL_tmps_floor = -1;
635 PL_tmps_ix = -1;
636 PL_tmps_max = 32;
637
638 New(54,PL_markstack,16,I32);
639 PL_markstack_ptr = PL_markstack;
640 PL_markstack_max = PL_markstack + 16;
641
642#ifdef SET_MARK_OFFSET
643 SET_MARK_OFFSET;
644#endif
645
646 New(54,PL_scopestack,8,I32);
647 PL_scopestack_ix = 0;
648 PL_scopestack_max = 8;
649
650 New(54,PL_savestack,24,ANY);
651 PL_savestack_ix = 0;
652 PL_savestack_max = 24;
653
654#if !PERL_VERSION_ATLEAST (5,10,0)
655 New(54,PL_retstack,4,OP*);
656 PL_retstack_ix = 0;
657 PL_retstack_max = 4;
658#endif
659}
660#endif
661
662/*
663 * destroy the stacks, the callchain etc...
664 */
665static void
666coro_destruct_stacks (pTHX)
667{
668 while (PL_curstackinfo->si_next)
669 PL_curstackinfo = PL_curstackinfo->si_next;
670
671 while (PL_curstackinfo)
672 {
673 PERL_SI *p = PL_curstackinfo->si_prev;
674
675 if (!IN_DESTRUCT)
676 SvREFCNT_dec (PL_curstackinfo->si_stack);
677
678 Safefree (PL_curstackinfo->si_cxstack);
679 Safefree (PL_curstackinfo);
680 PL_curstackinfo = p;
681 }
682
683 Safefree (PL_tmps_stack);
684 Safefree (PL_markstack);
685 Safefree (PL_scopestack);
686 Safefree (PL_savestack);
687#if !PERL_VERSION_ATLEAST (5,10,0)
688 Safefree (PL_retstack);
689#endif
690}
691
692static size_t
693coro_rss (pTHX_ struct coro *coro)
694{
695 size_t rss = sizeof (*coro);
696
697 if (coro->mainstack)
698 {
699 perl_slots tmp_slot;
700 perl_slots *slot;
701
702 if (coro->flags & CF_RUNNING)
703 {
704 slot = &tmp_slot;
705
706 #define VAR(name,type) slot->name = PL_ ## name;
707 # include "state.h"
708 #undef VAR
709 }
710 else
711 slot = coro->slot;
712
713 if (slot)
714 {
715 rss += sizeof (slot->curstackinfo);
716 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
717 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
718 rss += slot->tmps_max * sizeof (SV *);
719 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
720 rss += slot->scopestack_max * sizeof (I32);
721 rss += slot->savestack_max * sizeof (ANY);
722
723#if !PERL_VERSION_ATLEAST (5,10,0)
724 rss += slot->retstack_max * sizeof (OP *);
725#endif
726 }
727 }
728
729 return rss;
730}
731
732/** coroutine stack handling ************************************************/
733
734static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
736static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
737
738/* apparently < 5.8.8 */
739#ifndef MgPV_nolen_const
740#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
741 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
742 (const char*)(mg)->mg_ptr)
743#endif
744
745/*
746 * This overrides the default magic get method of %SIG elements.
747 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
748 * and instead of tryign to save and restore the hash elements, we just provide
749 * readback here.
750 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
751 * not expecting this to actually change the hook. This is a potential problem
752 * when a schedule happens then, but we ignore this.
753 */
863static void 754static int
864api_schedule (void) 755coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
865{ 756{
757 const char *s = MgPV_nolen_const (mg);
758
759 if (*s == '_')
760 {
761 SV **svp = 0;
762
763 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
764 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
765
766 if (svp)
767 {
768 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
769 return 0;
770 }
771 }
772
773 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
774}
775
776static int
777coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
778{
779 const char *s = MgPV_nolen_const (mg);
780
781 if (*s == '_')
782 {
783 SV **svp = 0;
784
785 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
786 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
787
788 if (svp)
789 {
790 SV *old = *svp;
791 *svp = 0;
792 SvREFCNT_dec (old);
793 return 0;
794 }
795 }
796
797 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
798}
799
800static int
801coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
802{
803 const char *s = MgPV_nolen_const (mg);
804
805 if (*s == '_')
806 {
807 SV **svp = 0;
808
809 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
810 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
811
812 if (svp)
813 {
814 SV *old = *svp;
815 *svp = newSVsv (sv);
816 SvREFCNT_dec (old);
817 return 0;
818 }
819 }
820
821 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
822}
823
824static void
825prepare_nop (pTHX_ struct coro_transfer_args *ta)
826{
827 /* kind of mega-hacky, but works */
828 ta->next = ta->prev = (struct coro *)ta;
829}
830
831static int
832slf_check_nop (pTHX_ struct CoroSLF *frame)
833{
834 return 0;
835}
836
837static UNOP coro_setup_op;
838
839static void NOINLINE /* noinline to keep it out of the transfer fast path */
840coro_setup (pTHX_ struct coro *coro)
841{
842 /*
843 * emulate part of the perl startup here.
844 */
845 coro_init_stacks (aTHX);
846
847 PL_runops = RUNOPS_DEFAULT;
848 PL_curcop = &PL_compiling;
849 PL_in_eval = EVAL_NULL;
850 PL_comppad = 0;
851 PL_curpm = 0;
852 PL_curpad = 0;
853 PL_localizing = 0;
854 PL_dirty = 0;
855 PL_restartop = 0;
856#if PERL_VERSION_ATLEAST (5,10,0)
857 PL_parser = 0;
858#endif
859
860 /* recreate the die/warn hooks */
861 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
862 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
863
864 GvSV (PL_defgv) = newSV (0);
865 GvAV (PL_defgv) = coro->args; coro->args = 0;
866 GvSV (PL_errgv) = newSV (0);
867 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
868 PL_rs = newSVsv (GvSV (irsgv));
869 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
870
871 {
872 dSP;
873 UNOP myop;
874
875 Zero (&myop, 1, UNOP);
876 myop.op_next = Nullop;
877 myop.op_type = OP_ENTERSUB;
878 myop.op_flags = OPf_WANT_VOID;
879
880 PUSHMARK (SP);
881 PUSHs ((SV *)coro->startcv);
882 PUTBACK;
883 PL_op = (OP *)&myop;
884 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
885 }
886
887 /* this newly created coroutine might be run on an existing cctx which most
888 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
889 */
890 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
891 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
892
893 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
894 coro_setup_op.op_next = PL_op;
895 coro_setup_op.op_type = OP_CUSTOM;
896 coro_setup_op.op_ppaddr = pp_slf;
897 /* no flags etc. required, as an init function won't be called */
898
899 PL_op = (OP *)&coro_setup_op;
900
901 /* copy throw, in case it was set before coro_setup */
902 CORO_THROW = coro->except;
903}
904
905static void
906coro_destruct (pTHX_ struct coro *coro)
907{
908 if (!IN_DESTRUCT)
909 {
910 /* restore all saved variables and stuff */
911 LEAVE_SCOPE (0);
912 assert (PL_tmps_floor == -1);
913
914 /* free all temporaries */
915 FREETMPS;
916 assert (PL_tmps_ix == -1);
917
918 /* unwind all extra stacks */
919 POPSTACK_TO (PL_mainstack);
920
921 /* unwind main stack */
922 dounwind (-1);
923 }
924
925 SvREFCNT_dec (GvSV (PL_defgv));
926 SvREFCNT_dec (GvAV (PL_defgv));
927 SvREFCNT_dec (GvSV (PL_errgv));
928 SvREFCNT_dec (PL_defoutgv);
929 SvREFCNT_dec (PL_rs);
930 SvREFCNT_dec (GvSV (irsgv));
931
932 SvREFCNT_dec (PL_diehook);
933 SvREFCNT_dec (PL_warnhook);
934
935 SvREFCNT_dec (coro->saved_deffh);
936 SvREFCNT_dec (coro->rouse_cb);
937
938 coro_destruct_stacks (aTHX);
939}
940
941INLINE void
942free_coro_mortal (pTHX)
943{
944 if (expect_true (coro_mortal))
945 {
946 SvREFCNT_dec (coro_mortal);
947 coro_mortal = 0;
948 }
949}
950
951static int
952runops_trace (pTHX)
953{
954 COP *oldcop = 0;
955 int oldcxix = -2;
956 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
957 coro_cctx *cctx = coro->cctx;
958
959 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
960 {
961 PERL_ASYNC_CHECK ();
962
963 if (cctx->flags & CC_TRACE_ALL)
964 {
965 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
966 {
967 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
968 SV **bot, **top;
969 AV *av = newAV (); /* return values */
970 SV **cb;
971 dSP;
972
973 GV *gv = CvGV (cx->blk_sub.cv);
974 SV *fullname = sv_2mortal (newSV (0));
975 if (isGV (gv))
976 gv_efullname3 (fullname, gv, 0);
977
978 bot = PL_stack_base + cx->blk_oldsp + 1;
979 top = cx->blk_gimme == G_ARRAY ? SP + 1
980 : cx->blk_gimme == G_SCALAR ? bot + 1
981 : bot;
982
983 av_extend (av, top - bot);
984 while (bot < top)
985 av_push (av, SvREFCNT_inc_NN (*bot++));
986
987 PL_runops = RUNOPS_DEFAULT;
988 ENTER;
989 SAVETMPS;
990 EXTEND (SP, 3);
991 PUSHMARK (SP);
992 PUSHs (&PL_sv_no);
993 PUSHs (fullname);
994 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
1002 }
1003
1004 if (oldcop != PL_curcop)
1005 {
1006 oldcop = PL_curcop;
1007
1008 if (PL_curcop != &PL_compiling)
1009 {
1010 SV **cb;
1011
1012 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1013 {
1014 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1015
1016 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1017 {
1018 runops_proc_t old_runops = PL_runops;
1019 dSP;
1020 GV *gv = CvGV (cx->blk_sub.cv);
1021 SV *fullname = sv_2mortal (newSV (0));
1022
1023 if (isGV (gv))
1024 gv_efullname3 (fullname, gv, 0);
1025
1026 PL_runops = RUNOPS_DEFAULT;
1027 ENTER;
1028 SAVETMPS;
1029 EXTEND (SP, 3);
1030 PUSHMARK (SP);
1031 PUSHs (&PL_sv_yes);
1032 PUSHs (fullname);
1033 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1034 PUTBACK;
1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1037 SPAGAIN;
1038 FREETMPS;
1039 LEAVE;
1040 PL_runops = runops_trace;
1041 }
1042
1043 oldcxix = cxstack_ix;
1044 }
1045
1046 if (cctx->flags & CC_TRACE_LINE)
1047 {
1048 dSP;
1049
1050 PL_runops = RUNOPS_DEFAULT;
1051 ENTER;
1052 SAVETMPS;
1053 EXTEND (SP, 3);
1054 PL_runops = RUNOPS_DEFAULT;
1055 PUSHMARK (SP);
1056 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1057 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1058 PUTBACK;
1059 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1060 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1061 SPAGAIN;
1062 FREETMPS;
1063 LEAVE;
1064 PL_runops = runops_trace;
1065 }
1066 }
1067 }
1068 }
1069 }
1070
1071 TAINT_NOT;
1072 return 0;
1073}
1074
1075static struct coro_cctx *cctx_ssl_cctx;
1076static struct CoroSLF cctx_ssl_frame;
1077
1078static void
1079slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1080{
1081 ta->prev = (struct coro *)cctx_ssl_cctx;
1082 ta->next = 0;
1083}
1084
1085static int
1086slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1087{
1088 *frame = cctx_ssl_frame;
1089
1090 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1091}
1092
1093/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1094static void NOINLINE
1095cctx_prepare (pTHX_ coro_cctx *cctx)
1096{
1097 PL_top_env = &PL_start_env;
1098
1099 if (cctx->flags & CC_TRACE)
1100 PL_runops = runops_trace;
1101
1102 /* we already must be executing an SLF op, there is no other valid way
1103 * that can lead to creation of a new cctx */
1104 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1105 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1106
1107 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1108 cctx_ssl_cctx = cctx;
1109 cctx_ssl_frame = slf_frame;
1110
1111 slf_frame.prepare = slf_prepare_set_stacklevel;
1112 slf_frame.check = slf_check_set_stacklevel;
1113}
1114
1115/* the tail of transfer: execute stuff we can only do after a transfer */
1116INLINE void
1117transfer_tail (pTHX)
1118{
1119 free_coro_mortal (aTHX);
1120}
1121
1122/*
1123 * this is a _very_ stripped down perl interpreter ;)
1124 */
1125static void
1126cctx_run (void *arg)
1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
1134 dTHX;
1135
1136 /* normally we would need to skip the entersub here */
1137 /* not doing so will re-execute it, which is exactly what we want */
1138 /* PL_nop = PL_nop->op_next */
1139
1140 /* inject a fake subroutine call to cctx_init */
1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 transfer_tail (aTHX);
1145
1146 /* somebody or something will hit me for both perl_run and PL_restartop */
1147 PL_restartop = PL_op;
1148 perl_run (PL_curinterp);
1149 /*
1150 * Unfortunately, there is no way to get at the return values of the
1151 * coro body here, as perl_run destroys these
1152 */
1153
1154 /*
1155 * If perl-run returns we assume exit() was being called or the coro
1156 * fell off the end, which seems to be the only valid (non-bug)
1157 * reason for perl_run to return. We try to exit by jumping to the
1158 * bootstrap-time "top" top_env, as we cannot restore the "main"
1159 * coroutine as Coro has no such concept
1160 */
1161 PL_top_env = main_top_env;
1162 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1163 }
1164}
1165
1166static coro_cctx *
1167cctx_new ()
1168{
1169 coro_cctx *cctx;
1170
1171 ++cctx_count;
1172 New (0, cctx, 1, coro_cctx);
1173
1174 cctx->gen = cctx_gen;
1175 cctx->flags = 0;
1176 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1177
1178 return cctx;
1179}
1180
1181/* create a new cctx only suitable as source */
1182static coro_cctx *
1183cctx_new_empty ()
1184{
1185 coro_cctx *cctx = cctx_new ();
1186
1187 cctx->sptr = 0;
1188 coro_create (&cctx->cctx, 0, 0, 0, 0);
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx suitable as destination/running a perl interpreter */
1194static coro_cctx *
1195cctx_new_run ()
1196{
1197 coro_cctx *cctx = cctx_new ();
1198 void *stack_start;
1199 size_t stack_size;
1200
1201#if HAVE_MMAP
1202 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1203 /* mmap supposedly does allocate-on-write for us */
1204 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1205
1206 if (cctx->sptr != (void *)-1)
1207 {
1208 #if CORO_STACKGUARD
1209 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1210 #endif
1211 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1212 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1213 cctx->flags |= CC_MAPPED;
1214 }
1215 else
1216#endif
1217 {
1218 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1219 New (0, cctx->sptr, cctx_stacksize, long);
1220
1221 if (!cctx->sptr)
1222 {
1223 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1224 _exit (EXIT_FAILURE);
1225 }
1226
1227 stack_start = cctx->sptr;
1228 stack_size = cctx->ssize;
1229 }
1230
1231 #if CORO_USE_VALGRIND
1232 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1233 #endif
1234
1235 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1236
1237 return cctx;
1238}
1239
1240static void
1241cctx_destroy (coro_cctx *cctx)
1242{
1243 if (!cctx)
1244 return;
1245
1246 --cctx_count;
1247 coro_destroy (&cctx->cctx);
1248
1249 /* coro_transfer creates new, empty cctx's */
1250 if (cctx->sptr)
1251 {
1252 #if CORO_USE_VALGRIND
1253 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1254 #endif
1255
1256#if HAVE_MMAP
1257 if (cctx->flags & CC_MAPPED)
1258 munmap (cctx->sptr, cctx->ssize);
1259 else
1260#endif
1261 Safefree (cctx->sptr);
1262 }
1263
1264 Safefree (cctx);
1265}
1266
1267/* wether this cctx should be destructed */
1268#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1269
1270static coro_cctx *
1271cctx_get (pTHX)
1272{
1273 while (expect_true (cctx_first))
1274 {
1275 coro_cctx *cctx = cctx_first;
1276 cctx_first = cctx->next;
1277 --cctx_idle;
1278
1279 if (expect_true (!CCTX_EXPIRED (cctx)))
1280 return cctx;
1281
1282 cctx_destroy (cctx);
1283 }
1284
1285 return cctx_new_run ();
1286}
1287
1288static void
1289cctx_put (coro_cctx *cctx)
1290{
1291 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1292
1293 /* free another cctx if overlimit */
1294 if (expect_false (cctx_idle >= cctx_max_idle))
1295 {
1296 coro_cctx *first = cctx_first;
1297 cctx_first = first->next;
1298 --cctx_idle;
1299
1300 cctx_destroy (first);
1301 }
1302
1303 ++cctx_idle;
1304 cctx->next = cctx_first;
1305 cctx_first = cctx;
1306}
1307
1308/** coroutine switching *****************************************************/
1309
1310static void
1311transfer_check (pTHX_ struct coro *prev, struct coro *next)
1312{
1313 /* TODO: throwing up here is considered harmful */
1314
1315 if (expect_true (prev != next))
1316 {
1317 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1318 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1319
1320 if (expect_false (next->flags & CF_RUNNING))
1321 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1322
1323 if (expect_false (next->flags & CF_DESTROYED))
1324 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1325
1326#if !PERL_VERSION_ATLEAST (5,10,0)
1327 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1328 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1329#endif
1330 }
1331}
1332
1333/* always use the TRANSFER macro */
1334static void NOINLINE /* noinline so we have a fixed stackframe */
1335transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1336{
1337 dSTACKLEVEL;
1338
1339 /* sometimes transfer is only called to set idle_sp */
1340 if (expect_false (!next))
1341 {
1342 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1343 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1344 }
1345 else if (expect_true (prev != next))
1346 {
1347 coro_cctx *prev__cctx;
1348
1349 if (expect_false (prev->flags & CF_NEW))
1350 {
1351 /* create a new empty/source context */
1352 prev->cctx = cctx_new_empty ();
1353 prev->flags &= ~CF_NEW;
1354 prev->flags |= CF_RUNNING;
1355 }
1356
1357 prev->flags &= ~CF_RUNNING;
1358 next->flags |= CF_RUNNING;
1359
1360 /* first get rid of the old state */
1361 save_perl (aTHX_ prev);
1362
1363 if (expect_false (next->flags & CF_NEW))
1364 {
1365 /* need to start coroutine */
1366 next->flags &= ~CF_NEW;
1367 /* setup coroutine call */
1368 coro_setup (aTHX_ next);
1369 }
1370 else
1371 load_perl (aTHX_ next);
1372
1373 prev__cctx = prev->cctx;
1374
1375 /* possibly untie and reuse the cctx */
1376 if (expect_true (
1377 prev__cctx->idle_sp == STACKLEVEL
1378 && !(prev__cctx->flags & CC_TRACE)
1379 && !force_cctx
1380 ))
1381 {
1382 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1383 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1384
1385 prev->cctx = 0;
1386
1387 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1388 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1389 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1390 if (!next->cctx)
1391 next->cctx = cctx_get (aTHX);
1392
1393 cctx_put (prev__cctx);
1394 }
1395
1396 ++next->usecount;
1397
1398 if (expect_true (!next->cctx))
1399 next->cctx = cctx_get (aTHX);
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1406 }
1407
1408 transfer_tail (aTHX);
1409 }
1410}
1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 if (coro->on_destroy)
1424 coro->on_destroy (aTHX_ coro);
1425
1426 coro->flags |= CF_DESTROYED;
1427
1428 if (coro->flags & CF_READY)
1429 {
1430 /* reduce nready, as destroying a ready coro effectively unreadies it */
1431 /* alternative: look through all ready queues and remove the coro */
1432 --coro_nready;
1433 }
1434 else
1435 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1436
1437 if (coro->mainstack && coro->mainstack != main_mainstack)
1438 {
1439 struct coro temp;
1440
1441 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->startcv);
1455 SvREFCNT_dec (coro->args);
1456 SvREFCNT_dec (CORO_THROW);
1457
1458 if (coro->next) coro->next->prev = coro->prev;
1459 if (coro->prev) coro->prev->next = coro->next;
1460 if (coro == coro_first) coro_first = coro->next;
1461
1462 return 1;
1463}
1464
1465static int
1466coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1467{
1468 struct coro *coro = (struct coro *)mg->mg_ptr;
1469 mg->mg_ptr = 0;
1470
1471 coro->hv = 0;
1472
1473 if (--coro->refcnt < 0)
1474 {
1475 coro_state_destroy (aTHX_ coro);
1476 Safefree (coro);
1477 }
1478
1479 return 0;
1480}
1481
1482static int
1483coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1484{
1485 struct coro *coro = (struct coro *)mg->mg_ptr;
1486
1487 ++coro->refcnt;
1488
1489 return 0;
1490}
1491
1492static MGVTBL coro_state_vtbl = {
1493 0, 0, 0, 0,
1494 coro_state_free,
1495 0,
1496#ifdef MGf_DUP
1497 coro_state_dup,
1498#else
1499# define MGf_DUP 0
1500#endif
1501};
1502
1503static void
1504prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1505{
1506 ta->prev = SvSTATE (prev_sv);
1507 ta->next = SvSTATE (next_sv);
1508 TRANSFER_CHECK (*ta);
1509}
1510
1511static void
1512api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1513{
1514 struct coro_transfer_args ta;
1515
1516 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1517 TRANSFER (ta, 1);
1518}
1519
1520/*****************************************************************************/
1521/* gensub: simple closure generation utility */
1522
1523#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1524
1525/* create a closure from XS, returns a code reference */
1526/* the arg can be accessed via GENSUB_ARG from the callback */
1527/* the callback must use dXSARGS/XSRETURN */
1528static SV *
1529gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1530{
1531 CV *cv = (CV *)newSV (0);
1532
1533 sv_upgrade ((SV *)cv, SVt_PVCV);
1534
1535 CvANON_on (cv);
1536 CvISXSUB_on (cv);
1537 CvXSUB (cv) = xsub;
1538 GENSUB_ARG = arg;
1539
1540 return newRV_noinc ((SV *)cv);
1541}
1542
1543/** Coro ********************************************************************/
1544
1545INLINE void
1546coro_enq (pTHX_ struct coro *coro)
1547{
1548 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1549}
1550
1551INLINE SV *
1552coro_deq (pTHX)
1553{
1554 int prio;
1555
1556 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1557 if (AvFILLp (coro_ready [prio]) >= 0)
1558 return av_shift (coro_ready [prio]);
1559
1560 return 0;
1561}
1562
1563static int
1564api_ready (pTHX_ SV *coro_sv)
1565{
1566 struct coro *coro;
1567 SV *sv_hook;
1568 void (*xs_hook)(void);
1569
1570 if (SvROK (coro_sv))
1571 coro_sv = SvRV (coro_sv);
1572
1573 coro = SvSTATE (coro_sv);
1574
1575 if (coro->flags & CF_READY)
1576 return 0;
1577
1578 coro->flags |= CF_READY;
1579
1580 sv_hook = coro_nready ? 0 : coro_readyhook;
1581 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1582
1583 coro_enq (aTHX_ coro);
1584 ++coro_nready;
1585
1586 if (sv_hook)
1587 {
1588 dSP;
1589
1590 ENTER;
1591 SAVETMPS;
1592
1593 PUSHMARK (SP);
1594 PUTBACK;
1595 call_sv (sv_hook, G_VOID | G_DISCARD);
1596
1597 FREETMPS;
1598 LEAVE;
1599 }
1600
1601 if (xs_hook)
1602 xs_hook ();
1603
1604 return 1;
1605}
1606
1607static int
1608api_is_ready (pTHX_ SV *coro_sv)
1609{
1610 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1611}
1612
1613INLINE void
1614prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1615{
866 SV *prev, *next; 1616 SV *prev_sv, *next_sv;
867 1617
868 prev = SvRV (GvSV (coro_current)); 1618 for (;;)
869 next = coro_deq (PRIO_MIN); 1619 {
1620 next_sv = coro_deq (aTHX);
870 1621
871 if (!next) 1622 /* nothing to schedule: call the idle handler */
872 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1623 if (expect_false (!next_sv))
1624 {
1625 dSP;
1626
1627 ENTER;
1628 SAVETMPS;
1629
1630 PUSHMARK (SP);
1631 PUTBACK;
1632 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1633
1634 FREETMPS;
1635 LEAVE;
1636 continue;
1637 }
1638
1639 ta->next = SvSTATE_hv (next_sv);
1640
1641 /* cannot transfer to destroyed coros, skip and look for next */
1642 if (expect_false (ta->next->flags & CF_DESTROYED))
1643 {
1644 SvREFCNT_dec (next_sv);
1645 /* coro_nready has already been taken care of by destroy */
1646 continue;
1647 }
1648
1649 --coro_nready;
1650 break;
1651 }
873 1652
874 /* free this only after the transfer */ 1653 /* free this only after the transfer */
1654 prev_sv = SvRV (coro_current);
1655 ta->prev = SvSTATE_hv (prev_sv);
1656 TRANSFER_CHECK (*ta);
1657 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1658 ta->next->flags &= ~CF_READY;
1659 SvRV_set (coro_current, next_sv);
1660
1661 free_coro_mortal (aTHX);
875 coro_mortal = prev; 1662 coro_mortal = prev_sv;
876 SV_CORO (prev, "Coro::schedule");
877
878 SvRV (GvSV (coro_current)) = next;
879
880 SV_CORO (next, "Coro::schedule");
881
882 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
883 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
884} 1663}
885 1664
886static void 1665INLINE void
887api_cede (void) 1666prepare_cede (pTHX_ struct coro_transfer_args *ta)
888{ 1667{
889 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1668 api_ready (aTHX_ coro_current);
1669 prepare_schedule (aTHX_ ta);
1670}
890 1671
1672INLINE void
1673prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1674{
1675 SV *prev = SvRV (coro_current);
1676
1677 if (coro_nready)
1678 {
1679 prepare_schedule (aTHX_ ta);
1680 api_ready (aTHX_ prev);
1681 }
1682 else
1683 prepare_nop (aTHX_ ta);
1684}
1685
1686static void
891 api_schedule (); 1687api_schedule (pTHX)
892} 1688{
1689 struct coro_transfer_args ta;
893 1690
1691 prepare_schedule (aTHX_ &ta);
1692 TRANSFER (ta, 1);
1693}
1694
1695static int
1696api_cede (pTHX)
1697{
1698 struct coro_transfer_args ta;
1699
1700 prepare_cede (aTHX_ &ta);
1701
1702 if (expect_true (ta.prev != ta.next))
1703 {
1704 TRANSFER (ta, 1);
1705 return 1;
1706 }
1707 else
1708 return 0;
1709}
1710
1711static int
1712api_cede_notself (pTHX)
1713{
1714 if (coro_nready)
1715 {
1716 struct coro_transfer_args ta;
1717
1718 prepare_cede_notself (aTHX_ &ta);
1719 TRANSFER (ta, 1);
1720 return 1;
1721 }
1722 else
1723 return 0;
1724}
1725
1726static void
1727api_trace (pTHX_ SV *coro_sv, int flags)
1728{
1729 struct coro *coro = SvSTATE (coro_sv);
1730
1731 if (flags & CC_TRACE)
1732 {
1733 if (!coro->cctx)
1734 coro->cctx = cctx_new_run ();
1735 else if (!(coro->cctx->flags & CC_TRACE))
1736 croak ("cannot enable tracing on coroutine with custom stack,");
1737
1738 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1739 }
1740 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1741 {
1742 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1743
1744 if (coro->flags & CF_RUNNING)
1745 PL_runops = RUNOPS_DEFAULT;
1746 else
1747 coro->slot->runops = RUNOPS_DEFAULT;
1748 }
1749}
1750
1751/*****************************************************************************/
1752/* rouse callback */
1753
1754#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1755
1756static void
1757coro_rouse_callback (pTHX_ CV *cv)
1758{
1759 dXSARGS;
1760 SV *data = (SV *)GENSUB_ARG;
1761
1762 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1763 {
1764 /* first call, set args */
1765 int i;
1766 AV *av = newAV ();
1767 SV *coro = SvRV (data);
1768
1769 SvRV_set (data, (SV *)av);
1770 api_ready (aTHX_ coro);
1771 SvREFCNT_dec (coro);
1772
1773 /* better take a full copy of the arguments */
1774 while (items--)
1775 av_store (av, items, newSVsv (ST (items)));
1776 }
1777
1778 XSRETURN_EMPTY;
1779}
1780
1781static int
1782slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1783{
1784 SV *data = (SV *)frame->data;
1785
1786 if (CORO_THROW)
1787 return 0;
1788
1789 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1790 return 1;
1791
1792 /* now push all results on the stack */
1793 {
1794 dSP;
1795 AV *av = (AV *)SvRV (data);
1796 int i;
1797
1798 EXTEND (SP, AvFILLp (av) + 1);
1799 for (i = 0; i <= AvFILLp (av); ++i)
1800 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1801
1802 /* we have stolen the elements, so ste length to zero and free */
1803 AvFILLp (av) = -1;
1804 av_undef (av);
1805
1806 PUTBACK;
1807 }
1808
1809 return 0;
1810}
1811
1812static void
1813slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 SV *cb;
1816
1817 if (items)
1818 cb = arg [0];
1819 else
1820 {
1821 struct coro *coro = SvSTATE_current;
1822
1823 if (!coro->rouse_cb)
1824 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1825
1826 cb = sv_2mortal (coro->rouse_cb);
1827 coro->rouse_cb = 0;
1828 }
1829
1830 if (!SvROK (cb)
1831 || SvTYPE (SvRV (cb)) != SVt_PVCV
1832 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1833 croak ("Coro::rouse_wait called with illegal callback argument,");
1834
1835 {
1836 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1837 SV *data = (SV *)GENSUB_ARG;
1838
1839 frame->data = (void *)data;
1840 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1841 frame->check = slf_check_rouse_wait;
1842 }
1843}
1844
1845static SV *
1846coro_new_rouse_cb (pTHX)
1847{
1848 HV *hv = (HV *)SvRV (coro_current);
1849 struct coro *coro = SvSTATE_hv (hv);
1850 SV *data = newRV_inc ((SV *)hv);
1851 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1852
1853 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1854 SvREFCNT_dec (data); /* magicext increases the refcount */
1855
1856 SvREFCNT_dec (coro->rouse_cb);
1857 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1858
1859 return cb;
1860}
1861
1862/*****************************************************************************/
1863/* schedule-like-function opcode (SLF) */
1864
1865static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1866static const CV *slf_cv;
1867static SV **slf_argv;
1868static int slf_argc, slf_arga; /* count, allocated */
1869static I32 slf_ax; /* top of stack, for restore */
1870
1871/* this restores the stack in the case we patched the entersub, to */
1872/* recreate the stack frame as perl will on following calls */
1873/* since entersub cleared the stack */
1874static OP *
1875pp_restore (pTHX)
1876{
1877 int i;
1878 SV **SP = PL_stack_base + slf_ax;
1879
1880 PUSHMARK (SP);
1881
1882 EXTEND (SP, slf_argc + 1);
1883
1884 for (i = 0; i < slf_argc; ++i)
1885 PUSHs (sv_2mortal (slf_argv [i]));
1886
1887 PUSHs ((SV *)CvGV (slf_cv));
1888
1889 RETURNOP (slf_restore.op_first);
1890}
1891
1892static void
1893slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1894{
1895 SV **arg = (SV **)slf_frame.data;
1896
1897 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1898}
1899
1900static void
1901slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1902{
1903 if (items != 2)
1904 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1905
1906 frame->prepare = slf_prepare_transfer;
1907 frame->check = slf_check_nop;
1908 frame->data = (void *)arg; /* let's hope it will stay valid */
1909}
1910
1911static void
1912slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1913{
1914 frame->prepare = prepare_schedule;
1915 frame->check = slf_check_nop;
1916}
1917
1918static void
1919slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1920{
1921 frame->prepare = prepare_cede;
1922 frame->check = slf_check_nop;
1923}
1924
1925static void
1926slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1927{
1928 frame->prepare = prepare_cede_notself;
1929 frame->check = slf_check_nop;
1930}
1931
1932/*
1933 * these not obviously related functions are all rolled into one
1934 * function to increase chances that they all will call transfer with the same
1935 * stack offset
1936 * SLF stands for "schedule-like-function".
1937 */
1938static OP *
1939pp_slf (pTHX)
1940{
1941 I32 checkmark; /* mark SP to see how many elements check has pushed */
1942
1943 /* set up the slf frame, unless it has already been set-up */
1944 /* the latter happens when a new coro has been started */
1945 /* or when a new cctx was attached to an existing coroutine */
1946 if (expect_true (!slf_frame.prepare))
1947 {
1948 /* first iteration */
1949 dSP;
1950 SV **arg = PL_stack_base + TOPMARK + 1;
1951 int items = SP - arg; /* args without function object */
1952 SV *gv = *sp;
1953
1954 /* do a quick consistency check on the "function" object, and if it isn't */
1955 /* for us, divert to the real entersub */
1956 if (SvTYPE (gv) != SVt_PVGV
1957 || !GvCV (gv)
1958 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1959 return PL_ppaddr[OP_ENTERSUB](aTHX);
1960
1961 if (!(PL_op->op_flags & OPf_STACKED))
1962 {
1963 /* ampersand-form of call, use @_ instead of stack */
1964 AV *av = GvAV (PL_defgv);
1965 arg = AvARRAY (av);
1966 items = AvFILLp (av) + 1;
1967 }
1968
1969 /* now call the init function, which needs to set up slf_frame */
1970 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1971 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1972
1973 /* pop args */
1974 SP = PL_stack_base + POPMARK;
1975
1976 PUTBACK;
1977 }
1978
1979 /* now that we have a slf_frame, interpret it! */
1980 /* we use a callback system not to make the code needlessly */
1981 /* complicated, but so we can run multiple perl coros from one cctx */
1982
1983 do
1984 {
1985 struct coro_transfer_args ta;
1986
1987 slf_frame.prepare (aTHX_ &ta);
1988 TRANSFER (ta, 0);
1989
1990 checkmark = PL_stack_sp - PL_stack_base;
1991 }
1992 while (slf_frame.check (aTHX_ &slf_frame));
1993
1994 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1995
1996 /* exception handling */
1997 if (expect_false (CORO_THROW))
1998 {
1999 SV *exception = sv_2mortal (CORO_THROW);
2000
2001 CORO_THROW = 0;
2002 sv_setsv (ERRSV, exception);
2003 croak (0);
2004 }
2005
2006 /* return value handling - mostly like entersub */
2007 /* make sure we put something on the stack in scalar context */
2008 if (GIMME_V == G_SCALAR)
2009 {
2010 dSP;
2011 SV **bot = PL_stack_base + checkmark;
2012
2013 if (sp == bot) /* too few, push undef */
2014 bot [1] = &PL_sv_undef;
2015 else if (sp != bot + 1) /* too many, take last one */
2016 bot [1] = *sp;
2017
2018 SP = bot + 1;
2019
2020 PUTBACK;
2021 }
2022
2023 return NORMAL;
2024}
2025
2026static void
2027api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2028{
2029 int i;
2030 SV **arg = PL_stack_base + ax;
2031 int items = PL_stack_sp - arg + 1;
2032
2033 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2034
2035 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2036 && PL_op->op_ppaddr != pp_slf)
2037 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2038
2039 CvFLAGS (cv) |= CVf_SLF;
2040 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2041 slf_cv = cv;
2042
2043 /* we patch the op, and then re-run the whole call */
2044 /* we have to put the same argument on the stack for this to work */
2045 /* and this will be done by pp_restore */
2046 slf_restore.op_next = (OP *)&slf_restore;
2047 slf_restore.op_type = OP_CUSTOM;
2048 slf_restore.op_ppaddr = pp_restore;
2049 slf_restore.op_first = PL_op;
2050
2051 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2052
2053 if (PL_op->op_flags & OPf_STACKED)
2054 {
2055 if (items > slf_arga)
2056 {
2057 slf_arga = items;
2058 free (slf_argv);
2059 slf_argv = malloc (slf_arga * sizeof (SV *));
2060 }
2061
2062 slf_argc = items;
2063
2064 for (i = 0; i < items; ++i)
2065 slf_argv [i] = SvREFCNT_inc (arg [i]);
2066 }
2067 else
2068 slf_argc = 0;
2069
2070 PL_op->op_ppaddr = pp_slf;
2071 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2072
2073 PL_op = (OP *)&slf_restore;
2074}
2075
2076/*****************************************************************************/
2077/* PerlIO::cede */
2078
2079typedef struct
2080{
2081 PerlIOBuf base;
2082 NV next, every;
2083} PerlIOCede;
2084
2085static IV
2086PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2087{
2088 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2089
2090 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2091 self->next = nvtime () + self->every;
2092
2093 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2094}
2095
2096static SV *
2097PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2098{
2099 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2100
2101 return newSVnv (self->every);
2102}
2103
2104static IV
2105PerlIOCede_flush (pTHX_ PerlIO *f)
2106{
2107 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2108 double now = nvtime ();
2109
2110 if (now >= self->next)
2111 {
2112 api_cede (aTHX);
2113 self->next = now + self->every;
2114 }
2115
2116 return PerlIOBuf_flush (aTHX_ f);
2117}
2118
2119static PerlIO_funcs PerlIO_cede =
2120{
2121 sizeof(PerlIO_funcs),
2122 "cede",
2123 sizeof(PerlIOCede),
2124 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2125 PerlIOCede_pushed,
2126 PerlIOBuf_popped,
2127 PerlIOBuf_open,
2128 PerlIOBase_binmode,
2129 PerlIOCede_getarg,
2130 PerlIOBase_fileno,
2131 PerlIOBuf_dup,
2132 PerlIOBuf_read,
2133 PerlIOBuf_unread,
2134 PerlIOBuf_write,
2135 PerlIOBuf_seek,
2136 PerlIOBuf_tell,
2137 PerlIOBuf_close,
2138 PerlIOCede_flush,
2139 PerlIOBuf_fill,
2140 PerlIOBase_eof,
2141 PerlIOBase_error,
2142 PerlIOBase_clearerr,
2143 PerlIOBase_setlinebuf,
2144 PerlIOBuf_get_base,
2145 PerlIOBuf_bufsiz,
2146 PerlIOBuf_get_ptr,
2147 PerlIOBuf_get_cnt,
2148 PerlIOBuf_set_ptrcnt,
2149};
2150
2151/*****************************************************************************/
2152/* Coro::Semaphore & Coro::Signal */
2153
2154static SV *
2155coro_waitarray_new (pTHX_ int count)
2156{
2157 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2158 AV *av = newAV ();
2159 SV **ary;
2160
2161 /* unfortunately, building manually saves memory */
2162 Newx (ary, 2, SV *);
2163 AvALLOC (av) = ary;
2164 /*AvARRAY (av) = ary;*/
2165 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2166 AvMAX (av) = 1;
2167 AvFILLp (av) = 0;
2168 ary [0] = newSViv (count);
2169
2170 return newRV_noinc ((SV *)av);
2171}
2172
2173/* semaphore */
2174
2175static void
2176coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2177{
2178 SV *count_sv = AvARRAY (av)[0];
2179 IV count = SvIVX (count_sv);
2180
2181 count += adjust;
2182 SvIVX (count_sv) = count;
2183
2184 /* now wake up as many waiters as are expected to lock */
2185 while (count > 0 && AvFILLp (av) > 0)
2186 {
2187 SV *cb;
2188
2189 /* swap first two elements so we can shift a waiter */
2190 AvARRAY (av)[0] = AvARRAY (av)[1];
2191 AvARRAY (av)[1] = count_sv;
2192 cb = av_shift (av);
2193
2194 if (SvOBJECT (cb))
2195 {
2196 api_ready (aTHX_ cb);
2197 --count;
2198 }
2199 else if (SvTYPE (cb) == SVt_PVCV)
2200 {
2201 dSP;
2202 PUSHMARK (SP);
2203 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2204 PUTBACK;
2205 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2206 }
2207
2208 SvREFCNT_dec (cb);
2209 }
2210}
2211
2212static void
2213coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2214{
2215 /* call $sem->adjust (0) to possibly wake up some other waiters */
2216 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2217}
2218
2219static int
2220slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2221{
2222 AV *av = (AV *)frame->data;
2223 SV *count_sv = AvARRAY (av)[0];
2224
2225 /* if we are about to throw, don't actually acquire the lock, just throw */
2226 if (CORO_THROW)
2227 return 0;
2228 else if (SvIVX (count_sv) > 0)
2229 {
2230 SvSTATE_current->on_destroy = 0;
2231
2232 if (acquire)
2233 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2234 else
2235 coro_semaphore_adjust (aTHX_ av, 0);
2236
2237 return 0;
2238 }
2239 else
2240 {
2241 int i;
2242 /* if we were woken up but can't down, we look through the whole */
2243 /* waiters list and only add us if we aren't in there already */
2244 /* this avoids some degenerate memory usage cases */
2245
2246 for (i = 1; i <= AvFILLp (av); ++i)
2247 if (AvARRAY (av)[i] == SvRV (coro_current))
2248 return 1;
2249
2250 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2251 return 1;
2252 }
2253}
2254
2255static int
2256slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2257{
2258 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2259}
2260
2261static int
2262slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2263{
2264 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2265}
2266
2267static void
2268slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 AV *av = (AV *)SvRV (arg [0]);
2271
2272 if (SvIVX (AvARRAY (av)[0]) > 0)
2273 {
2274 frame->data = (void *)av;
2275 frame->prepare = prepare_nop;
2276 }
2277 else
2278 {
2279 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2280
2281 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2282 frame->prepare = prepare_schedule;
2283
2284 /* to avoid race conditions when a woken-up coro gets terminated */
2285 /* we arrange for a temporary on_destroy that calls adjust (0) */
2286 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2287 }
2288}
2289
2290static void
2291slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2294 frame->check = slf_check_semaphore_down;
2295}
2296
2297static void
2298slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 if (items >= 2)
2301 {
2302 /* callback form */
2303 AV *av = (AV *)SvRV (arg [0]);
2304 CV *cb_cv = coro_sv_2cv (arg [1]);
2305
2306 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2307
2308 if (SvIVX (AvARRAY (av)[0]) > 0)
2309 coro_semaphore_adjust (aTHX_ av, 0);
2310
2311 frame->prepare = prepare_nop;
2312 frame->check = slf_check_nop;
2313 }
2314 else
2315 {
2316 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2317 frame->check = slf_check_semaphore_wait;
2318 }
2319}
2320
2321/* signal */
2322
2323static void
2324coro_signal_wake (pTHX_ AV *av, int count)
2325{
2326 SvIVX (AvARRAY (av)[0]) = 0;
2327
2328 /* now signal count waiters */
2329 while (count > 0 && AvFILLp (av) > 0)
2330 {
2331 SV *cb;
2332
2333 /* swap first two elements so we can shift a waiter */
2334 cb = AvARRAY (av)[0];
2335 AvARRAY (av)[0] = AvARRAY (av)[1];
2336 AvARRAY (av)[1] = cb;
2337
2338 cb = av_shift (av);
2339
2340 api_ready (aTHX_ cb);
2341 sv_setiv (cb, 0); /* signal waiter */
2342 SvREFCNT_dec (cb);
2343
2344 --count;
2345 }
2346}
2347
2348static int
2349slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2350{
2351 /* if we are about to throw, also stop waiting */
2352 return SvROK ((SV *)frame->data) && !CORO_THROW;
2353}
2354
2355static void
2356slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2357{
2358 AV *av = (AV *)SvRV (arg [0]);
2359
2360 if (SvIVX (AvARRAY (av)[0]))
2361 {
2362 SvIVX (AvARRAY (av)[0]) = 0;
2363 frame->prepare = prepare_nop;
2364 frame->check = slf_check_nop;
2365 }
2366 else
2367 {
2368 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2369
2370 av_push (av, waiter);
2371
2372 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2373 frame->prepare = prepare_schedule;
2374 frame->check = slf_check_signal_wait;
2375 }
2376}
2377
2378/*****************************************************************************/
2379/* Coro::AIO */
2380
2381#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2382
2383/* helper storage struct */
2384struct io_state
2385{
2386 int errorno;
2387 I32 laststype; /* U16 in 5.10.0 */
2388 int laststatval;
2389 Stat_t statcache;
2390};
2391
2392static void
2393coro_aio_callback (pTHX_ CV *cv)
2394{
2395 dXSARGS;
2396 AV *state = (AV *)GENSUB_ARG;
2397 SV *coro = av_pop (state);
2398 SV *data_sv = newSV (sizeof (struct io_state));
2399
2400 av_extend (state, items);
2401
2402 sv_upgrade (data_sv, SVt_PV);
2403 SvCUR_set (data_sv, sizeof (struct io_state));
2404 SvPOK_only (data_sv);
2405
2406 {
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 data->errorno = errno;
2410 data->laststype = PL_laststype;
2411 data->laststatval = PL_laststatval;
2412 data->statcache = PL_statcache;
2413 }
2414
2415 /* now build the result vector out of all the parameters and the data_sv */
2416 {
2417 int i;
2418
2419 for (i = 0; i < items; ++i)
2420 av_push (state, SvREFCNT_inc_NN (ST (i)));
2421 }
2422
2423 av_push (state, data_sv);
2424
2425 api_ready (aTHX_ coro);
2426 SvREFCNT_dec (coro);
2427 SvREFCNT_dec ((AV *)state);
2428}
2429
2430static int
2431slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2432{
2433 AV *state = (AV *)frame->data;
2434
2435 /* if we are about to throw, return early */
2436 /* this does not cancel the aio request, but at least */
2437 /* it quickly returns */
2438 if (CORO_THROW)
2439 return 0;
2440
2441 /* one element that is an RV? repeat! */
2442 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2443 return 1;
2444
2445 /* restore status */
2446 {
2447 SV *data_sv = av_pop (state);
2448 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2449
2450 errno = data->errorno;
2451 PL_laststype = data->laststype;
2452 PL_laststatval = data->laststatval;
2453 PL_statcache = data->statcache;
2454
2455 SvREFCNT_dec (data_sv);
2456 }
2457
2458 /* push result values */
2459 {
2460 dSP;
2461 int i;
2462
2463 EXTEND (SP, AvFILLp (state) + 1);
2464 for (i = 0; i <= AvFILLp (state); ++i)
2465 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2466
2467 PUTBACK;
2468 }
2469
2470 return 0;
2471}
2472
2473static void
2474slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2475{
2476 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2477 SV *coro_hv = SvRV (coro_current);
2478 struct coro *coro = SvSTATE_hv (coro_hv);
2479
2480 /* put our coroutine id on the state arg */
2481 av_push (state, SvREFCNT_inc_NN (coro_hv));
2482
2483 /* first see whether we have a non-zero priority and set it as AIO prio */
2484 if (coro->prio)
2485 {
2486 dSP;
2487
2488 static SV *prio_cv;
2489 static SV *prio_sv;
2490
2491 if (expect_false (!prio_cv))
2492 {
2493 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2494 prio_sv = newSViv (0);
2495 }
2496
2497 PUSHMARK (SP);
2498 sv_setiv (prio_sv, coro->prio);
2499 XPUSHs (prio_sv);
2500
2501 PUTBACK;
2502 call_sv (prio_cv, G_VOID | G_DISCARD);
2503 }
2504
2505 /* now call the original request */
2506 {
2507 dSP;
2508 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2509 int i;
2510
2511 PUSHMARK (SP);
2512
2513 /* first push all args to the stack */
2514 EXTEND (SP, items + 1);
2515
2516 for (i = 0; i < items; ++i)
2517 PUSHs (arg [i]);
2518
2519 /* now push the callback closure */
2520 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2521
2522 /* now call the AIO function - we assume our request is uncancelable */
2523 PUTBACK;
2524 call_sv ((SV *)req, G_VOID | G_DISCARD);
2525 }
2526
2527 /* now that the requets is going, we loop toll we have a result */
2528 frame->data = (void *)state;
2529 frame->prepare = prepare_schedule;
2530 frame->check = slf_check_aio_req;
2531}
2532
2533static void
2534coro_aio_req_xs (pTHX_ CV *cv)
2535{
2536 dXSARGS;
2537
2538 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2539
2540 XSRETURN_EMPTY;
2541}
2542
2543/*****************************************************************************/
2544
894MODULE = Coro::State PACKAGE = Coro::State 2545MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
895 2546
896PROTOTYPES: ENABLE 2547PROTOTYPES: DISABLE
897 2548
898BOOT: 2549BOOT:
899{ /* {} necessary for stoopid perl-5.6.x */ 2550{
900 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2551#ifdef USE_ITHREADS
901 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2552# if CORO_PTHREAD
2553 coro_thx = PERL_GET_CONTEXT;
2554# endif
2555#endif
2556 BOOT_PAGESIZE;
2557
2558 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2559 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2560
2561 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2562 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2563 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2564
2565 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2566 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2567 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2568
902 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2569 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
903 2570
904 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2571 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
905 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
906 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
907 newCONSTSUB (coro_state_stash, "SAVE_CURPM", newSViv (TRANSFER_SAVE_CURPM)); 2572 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
2573 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
908 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2574 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
909
910 if (!padlist_cache)
911 padlist_cache = newHV ();
912 2575
913 main_mainstack = PL_mainstack; 2576 main_mainstack = PL_mainstack;
2577 main_top_env = PL_top_env;
914 2578
2579 while (main_top_env->je_prev)
2580 main_top_env = main_top_env->je_prev;
2581
2582 {
2583 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2584
2585 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2586 hv_store_ent (PL_custom_op_names, slf,
2587 newSVpv ("coro_slf", 0), 0);
2588
2589 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2590 hv_store_ent (PL_custom_op_descs, slf,
2591 newSVpv ("coro schedule like function", 0), 0);
2592 }
2593
915 coroapi.ver = CORO_API_VERSION; 2594 coroapi.ver = CORO_API_VERSION;
2595 coroapi.rev = CORO_API_REVISION;
2596
916 coroapi.transfer = api_transfer; 2597 coroapi.transfer = api_transfer;
917}
918 2598
919Coro::State 2599 coroapi.sv_state = SvSTATE_;
920_newprocess(args) 2600 coroapi.execute_slf = api_execute_slf;
921 SV * args 2601 coroapi.prepare_nop = prepare_nop;
922 PROTOTYPE: $ 2602 coroapi.prepare_schedule = prepare_schedule;
2603 coroapi.prepare_cede = prepare_cede;
2604 coroapi.prepare_cede_notself = prepare_cede_notself;
2605
2606 {
2607 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2608
2609 if (!svp) croak ("Time::HiRes is required");
2610 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2611
2612 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2613 }
2614
2615 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2616}
2617
2618SV *
2619new (char *klass, ...)
2620 ALIAS:
2621 Coro::new = 1
923 CODE: 2622 CODE:
924 Coro__State coro; 2623{
2624 struct coro *coro;
2625 MAGIC *mg;
2626 HV *hv;
2627 CV *cb;
2628 int i;
925 2629
926 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2630 if (items > 1)
927 croak ("Coro::State::_newprocess expects an arrayref");
928 2631 {
2632 cb = coro_sv_2cv (ST (1));
2633
2634 if (CvISXSUB (cb))
2635 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2636
2637 if (!CvROOT (cb))
2638 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2639 }
2640
929 New (0, coro, 1, struct coro); 2641 Newz (0, coro, 1, struct coro);
2642 coro->args = newAV ();
2643 coro->flags = CF_NEW;
930 2644
931 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2645 if (coro_first) coro_first->prev = coro;
932 coro->mainstack = 0; /* actual work is done inside transfer */ 2646 coro->next = coro_first;
933 coro->stack = 0; 2647 coro_first = coro;
934 2648
935 RETVAL = coro; 2649 coro->hv = hv = newHV ();
2650 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2651 mg->mg_flags |= MGf_DUP;
2652 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2653
2654 if (items > 1)
2655 {
2656 av_extend (coro->args, items - 1 + ix);
2657
2658 if (ix)
2659 {
2660 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2661 cb = coro_run_cv;
2662 }
2663
2664 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2665
2666 for (i = 2; i < items; i++)
2667 av_push (coro->args, newSVsv (ST (i)));
2668 }
2669}
936 OUTPUT: 2670 OUTPUT:
937 RETVAL 2671 RETVAL
938 2672
939void 2673void
940transfer(prev, next, flags) 2674transfer (...)
941 SV *prev
942 SV *next
943 int flags
944 PROTOTYPE: @ 2675 PROTOTYPE: $$
945 CODE: 2676 CODE:
946 PUTBACK; 2677 CORO_EXECUTE_SLF_XS (slf_init_transfer);
947 SV_CORO (next, "Coro::transfer"); 2678
948 SV_CORO (prev, "Coro::transfer"); 2679bool
949 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2680_destroy (SV *coro_sv)
950 SPAGAIN; 2681 CODE:
2682 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2683 OUTPUT:
2684 RETVAL
951 2685
952void 2686void
953DESTROY(coro) 2687_exit (int code)
954 Coro::State coro 2688 PROTOTYPE: $
955 CODE: 2689 CODE:
2690 _exit (code);
956 2691
957 if (coro->mainstack && coro->mainstack != main_mainstack) 2692int
2693cctx_stacksize (int new_stacksize = 0)
2694 PROTOTYPE: ;$
2695 CODE:
2696 RETVAL = cctx_stacksize;
2697 if (new_stacksize)
2698 {
2699 cctx_stacksize = new_stacksize;
2700 ++cctx_gen;
2701 }
2702 OUTPUT:
2703 RETVAL
2704
2705int
2706cctx_max_idle (int max_idle = 0)
2707 PROTOTYPE: ;$
2708 CODE:
2709 RETVAL = cctx_max_idle;
2710 if (max_idle > 1)
2711 cctx_max_idle = max_idle;
2712 OUTPUT:
2713 RETVAL
2714
2715int
2716cctx_count ()
2717 PROTOTYPE:
2718 CODE:
2719 RETVAL = cctx_count;
2720 OUTPUT:
2721 RETVAL
2722
2723int
2724cctx_idle ()
2725 PROTOTYPE:
2726 CODE:
2727 RETVAL = cctx_idle;
2728 OUTPUT:
2729 RETVAL
2730
2731void
2732list ()
2733 PROTOTYPE:
2734 PPCODE:
2735{
2736 struct coro *coro;
2737 for (coro = coro_first; coro; coro = coro->next)
2738 if (coro->hv)
2739 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2740}
2741
2742void
2743call (Coro::State coro, SV *coderef)
2744 ALIAS:
2745 eval = 1
2746 CODE:
2747{
2748 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
958 { 2749 {
959 struct coro temp; 2750 struct coro temp;
960 2751
2752 if (!(coro->flags & CF_RUNNING))
2753 {
2754 PUTBACK;
2755 save_perl (aTHX_ &temp);
2756 load_perl (aTHX_ coro);
2757 }
2758
2759 {
2760 dSP;
2761 ENTER;
2762 SAVETMPS;
961 PUTBACK; 2763 PUTBACK;
962 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2764 PUSHSTACK;
963 LOAD(aTHX_ coro); 2765 PUSHMARK (SP);
2766
2767 if (ix)
2768 eval_sv (coderef, 0);
2769 else
2770 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2771
2772 POPSTACK;
964 SPAGAIN; 2773 SPAGAIN;
2774 FREETMPS;
2775 LEAVE;
2776 PUTBACK;
2777 }
965 2778
966 destroy_stacks (aTHX); 2779 if (!(coro->flags & CF_RUNNING))
967 2780 {
968 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2781 save_perl (aTHX_ coro);
2782 load_perl (aTHX_ &temp);
969 SPAGAIN; 2783 SPAGAIN;
970 2784 }
971 coro->mainstack = 0;
972 } 2785 }
2786}
973 2787
974 deallocate_stack (coro); 2788SV *
975 2789is_ready (Coro::State coro)
976 Safefree (coro); 2790 PROTOTYPE: $
2791 ALIAS:
2792 is_ready = CF_READY
2793 is_running = CF_RUNNING
2794 is_new = CF_NEW
2795 is_destroyed = CF_DESTROYED
2796 CODE:
2797 RETVAL = boolSV (coro->flags & ix);
2798 OUTPUT:
2799 RETVAL
977 2800
978void 2801void
979flush() 2802throw (Coro::State self, SV *throw = &PL_sv_undef)
980 CODE: 2803 PROTOTYPE: $;$
981#ifdef MAY_FLUSH 2804 CODE:
982 flush_padlist_cache (); 2805{
983#endif 2806 struct coro *current = SvSTATE_current;
2807 SV **throwp = self == current ? &CORO_THROW : &self->except;
2808 SvREFCNT_dec (*throwp);
2809 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2810}
984 2811
985void 2812void
986_exit(code) 2813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
987 int code 2814 PROTOTYPE: $;$
2815 C_ARGS: aTHX_ coro, flags
2816
2817SV *
2818has_cctx (Coro::State coro)
988 PROTOTYPE: $ 2819 PROTOTYPE: $
989 CODE: 2820 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE 2821 RETVAL = boolSV (!!coro->cctx);
991 _exit (code); 2822 OUTPUT:
992#else 2823 RETVAL
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997 2824
998MODULE = Coro::State PACKAGE = Coro::Cont 2825int
2826is_traced (Coro::State coro)
2827 PROTOTYPE: $
2828 CODE:
2829 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2830 OUTPUT:
2831 RETVAL
999 2832
1000# this is slightly dirty (should expose a c-level api) 2833UV
2834rss (Coro::State coro)
2835 PROTOTYPE: $
2836 ALIAS:
2837 usecount = 1
2838 CODE:
2839 switch (ix)
2840 {
2841 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2842 case 1: RETVAL = coro->usecount; break;
2843 }
2844 OUTPUT:
2845 RETVAL
1001 2846
1002void 2847void
1003yield(...) 2848force_cctx ()
2849 PROTOTYPE:
2850 CODE:
2851 SvSTATE_current->cctx->idle_sp = 0;
2852
2853void
2854swap_defsv (Coro::State self)
1004 PROTOTYPE: @ 2855 PROTOTYPE: $
2856 ALIAS:
2857 swap_defav = 1
1005 CODE: 2858 CODE:
1006 static SV *returnstk; 2859 if (!self->slot)
1007 SV *sv; 2860 croak ("cannot swap state with coroutine that has no saved state,");
1008 AV *defav = GvAV (PL_defgv); 2861 else
1009 struct coro *prev, *next; 2862 {
2863 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2864 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1010 2865
1011 if (!returnstk) 2866 SV *tmp = *src; *src = *dst; *dst = tmp;
1012 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2867 }
1013 2868
1014 /* set up @_ -- ugly */
1015 av_clear (defav);
1016 av_fill (defav, items - 1);
1017 while (items--)
1018 av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021 sv = av_pop ((AV *)SvRV (returnstk));
1022 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024 SvREFCNT_dec (sv);
1025
1026 transfer(aTHX_ prev, next, 0);
1027 2869
1028MODULE = Coro::State PACKAGE = Coro 2870MODULE = Coro::State PACKAGE = Coro
1029 2871
1030# this is slightly dirty (should expose a c-level api)
1031
1032BOOT: 2872BOOT:
1033{ 2873{
1034 int i; 2874 int i;
2875
2876 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2877 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2878 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2879 coro_run_cv = get_cv (aTHX_ "Coro::_terminate", GV_ADD);
2880 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2881 SvREADONLY_on (coro_current);
2882
1035 HV *stash = gv_stashpv ("Coro", TRUE); 2883 coro_stash = gv_stashpv ("Coro", TRUE);
1036 2884
1037 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2885 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2886 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2887 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2888 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2889 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2890 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046 2891
1047 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2892 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048 coro_ready[i] = newAV (); 2893 coro_ready[i] = newAV ();
1049 2894
1050 { 2895 {
1051 SV *sv = perl_get_sv("Coro::API", 1); 2896 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1052 2897
1053 coroapi.schedule = api_schedule; 2898 coroapi.schedule = api_schedule;
1054 coroapi.cede = api_cede; 2899 coroapi.cede = api_cede;
2900 coroapi.cede_notself = api_cede_notself;
1055 coroapi.ready = api_ready; 2901 coroapi.ready = api_ready;
2902 coroapi.is_ready = api_is_ready;
1056 coroapi.nready = &coro_nready; 2903 coroapi.nready = coro_nready;
1057 coroapi.current = coro_current; 2904 coroapi.current = coro_current;
1058 2905
1059 GCoroAPI = &coroapi; 2906 /*GCoroAPI = &coroapi;*/
1060 sv_setiv(sv, (IV)&coroapi); 2907 sv_setiv (sv, (IV)&coroapi);
1061 SvREADONLY_on(sv); 2908 SvREADONLY_on (sv);
1062 } 2909 }
1063} 2910}
1064 2911
1065void 2912void
1066ready(self) 2913schedule (...)
1067 SV * self 2914 CODE:
2915 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2916
2917void
2918cede (...)
2919 CODE:
2920 CORO_EXECUTE_SLF_XS (slf_init_cede);
2921
2922void
2923cede_notself (...)
2924 CODE:
2925 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2926
2927void
2928_set_current (SV *current)
1068 PROTOTYPE: $ 2929 PROTOTYPE: $
1069 CODE: 2930 CODE:
1070 api_ready (self); 2931 SvREFCNT_dec (SvRV (coro_current));
2932 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2933
2934void
2935_set_readyhook (SV *hook)
2936 PROTOTYPE: $
2937 CODE:
2938 SvREFCNT_dec (coro_readyhook);
2939 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1071 2940
1072int 2941int
2942prio (Coro::State coro, int newprio = 0)
2943 PROTOTYPE: $;$
2944 ALIAS:
2945 nice = 1
2946 CODE:
2947{
2948 RETVAL = coro->prio;
2949
2950 if (items > 1)
2951 {
2952 if (ix)
2953 newprio = coro->prio - newprio;
2954
2955 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2956 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2957
2958 coro->prio = newprio;
2959 }
2960}
2961 OUTPUT:
2962 RETVAL
2963
2964SV *
2965ready (SV *self)
2966 PROTOTYPE: $
2967 CODE:
2968 RETVAL = boolSV (api_ready (aTHX_ self));
2969 OUTPUT:
2970 RETVAL
2971
2972int
1073nready(...) 2973nready (...)
1074 PROTOTYPE: 2974 PROTOTYPE:
1075 CODE: 2975 CODE:
1076 RETVAL = coro_nready; 2976 RETVAL = coro_nready;
1077 OUTPUT: 2977 OUTPUT:
1078 RETVAL 2978 RETVAL
1079 2979
2980# for async_pool speedup
1080void 2981void
1081schedule(...) 2982_pool_1 (SV *cb)
1082 PROTOTYPE:
1083 CODE: 2983 CODE:
1084 api_schedule (); 2984{
2985 HV *hv = (HV *)SvRV (coro_current);
2986 struct coro *coro = SvSTATE_hv ((SV *)hv);
2987 AV *defav = GvAV (PL_defgv);
2988 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2989 AV *invoke_av;
2990 int i, len;
2991
2992 if (!invoke)
2993 {
2994 SV *old = PL_diehook;
2995 PL_diehook = 0;
2996 SvREFCNT_dec (old);
2997 croak ("\3async_pool terminate\2\n");
2998 }
2999
3000 SvREFCNT_dec (coro->saved_deffh);
3001 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
3002
3003 hv_store (hv, "desc", sizeof ("desc") - 1,
3004 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
3005
3006 invoke_av = (AV *)SvRV (invoke);
3007 len = av_len (invoke_av);
3008
3009 sv_setsv (cb, AvARRAY (invoke_av)[0]);
3010
3011 if (len > 0)
3012 {
3013 av_fill (defav, len - 1);
3014 for (i = 0; i < len; ++i)
3015 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
3016 }
3017}
1085 3018
1086void 3019void
1087cede(...) 3020_pool_2 (SV *cb)
1088 PROTOTYPE:
1089 CODE: 3021 CODE:
3022{
3023 HV *hv = (HV *)SvRV (coro_current);
3024 struct coro *coro = SvSTATE_hv ((SV *)hv);
3025
3026 sv_setsv (cb, &PL_sv_undef);
3027
3028 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
3029 coro->saved_deffh = 0;
3030
3031 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
3032 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3033 {
3034 SV *old = PL_diehook;
3035 PL_diehook = 0;
3036 SvREFCNT_dec (old);
3037 croak ("\3async_pool terminate\2\n");
3038 }
3039
3040 av_clear (GvAV (PL_defgv));
3041 hv_store (hv, "desc", sizeof ("desc") - 1,
3042 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3043
3044 coro->prio = 0;
3045
3046 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3047 api_trace (aTHX_ coro_current, 0);
3048
3049 av_push (av_async_pool, newSVsv (coro_current));
3050}
3051
3052SV *
3053rouse_cb ()
3054 PROTOTYPE:
3055 CODE:
3056 RETVAL = coro_new_rouse_cb (aTHX);
3057 OUTPUT:
3058 RETVAL
3059
3060void
3061rouse_wait (...)
3062 PROTOTYPE: ;$
3063 PPCODE:
3064 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3065
3066
3067MODULE = Coro::State PACKAGE = PerlIO::cede
3068
3069BOOT:
3070 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3071
3072
3073MODULE = Coro::State PACKAGE = Coro::Semaphore
3074
3075SV *
3076new (SV *klass, SV *count = 0)
3077 CODE:
3078 RETVAL = sv_bless (
3079 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3080 GvSTASH (CvGV (cv))
3081 );
3082 OUTPUT:
3083 RETVAL
3084
3085# helper for Coro::Channel
3086SV *
3087_alloc (int count)
3088 CODE:
3089 RETVAL = coro_waitarray_new (aTHX_ count);
3090 OUTPUT:
3091 RETVAL
3092
3093SV *
3094count (SV *self)
3095 CODE:
3096 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3097 OUTPUT:
3098 RETVAL
3099
3100void
3101up (SV *self, int adjust = 1)
3102 ALIAS:
3103 adjust = 1
3104 CODE:
3105 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3106
3107void
3108down (...)
3109 CODE:
3110 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3111
3112void
3113wait (...)
3114 CODE:
3115 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3116
3117void
3118try (SV *self)
3119 PPCODE:
3120{
3121 AV *av = (AV *)SvRV (self);
3122 SV *count_sv = AvARRAY (av)[0];
3123 IV count = SvIVX (count_sv);
3124
3125 if (count > 0)
3126 {
3127 --count;
3128 SvIVX (count_sv) = count;
3129 XSRETURN_YES;
3130 }
3131 else
3132 XSRETURN_NO;
3133}
3134
3135void
3136waiters (SV *self)
3137 PPCODE:
3138{
3139 AV *av = (AV *)SvRV (self);
3140 int wcount = AvFILLp (av) + 1 - 1;
3141
3142 if (GIMME_V == G_SCALAR)
3143 XPUSHs (sv_2mortal (newSViv (wcount)));
3144 else
3145 {
3146 int i;
3147 EXTEND (SP, wcount);
3148 for (i = 1; i <= wcount; ++i)
3149 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3150 }
3151}
3152
3153MODULE = Coro::State PACKAGE = Coro::Signal
3154
3155SV *
3156new (SV *klass)
3157 CODE:
3158 RETVAL = sv_bless (
3159 coro_waitarray_new (aTHX_ 0),
3160 GvSTASH (CvGV (cv))
3161 );
3162 OUTPUT:
3163 RETVAL
3164
3165void
3166wait (...)
3167 CODE:
3168 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3169
3170void
3171broadcast (SV *self)
3172 CODE:
3173{
3174 AV *av = (AV *)SvRV (self);
3175 coro_signal_wake (aTHX_ av, AvFILLp (av));
3176}
3177
3178void
3179send (SV *self)
3180 CODE:
3181{
3182 AV *av = (AV *)SvRV (self);
3183
3184 if (AvFILLp (av))
3185 coro_signal_wake (aTHX_ av, 1);
3186 else
3187 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3188}
3189
3190IV
3191awaited (SV *self)
3192 CODE:
3193 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3194 OUTPUT:
3195 RETVAL
3196
3197
3198MODULE = Coro::State PACKAGE = Coro::AnyEvent
3199
3200BOOT:
3201 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3202
3203void
3204_schedule (...)
3205 CODE:
3206{
3207 static int incede;
3208
1090 api_cede (); 3209 api_cede_notself (aTHX);
1091 3210
3211 ++incede;
3212 while (coro_nready >= incede && api_cede (aTHX))
3213 ;
3214
3215 sv_setsv (sv_activity, &PL_sv_undef);
3216 if (coro_nready >= incede)
3217 {
3218 PUSHMARK (SP);
3219 PUTBACK;
3220 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3221 }
3222
3223 --incede;
3224}
3225
3226
3227MODULE = Coro::State PACKAGE = Coro::AIO
3228
3229void
3230_register (char *target, char *proto, SV *req)
3231 CODE:
3232{
3233 CV *req_cv = coro_sv_2cv (req);
3234 /* newXSproto doesn't return the CV on 5.8 */
3235 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3236 sv_setpv ((SV *)slf_cv, proto);
3237 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3238}
3239

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