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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.347 by root, Wed Jun 10 00:00:02 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
33 114
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 116# undef CORO_STACKGUARD
36#endif 117#endif
37 118
38#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 120# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
51# endif 161# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 162#endif
60#endif
61 163
62#define SUB_INIT "Coro::State::initialize" 164static double (*nvtime)(); /* so why doesn't it take void? */
63#define UCORO_STATE "_coro_state"
64 165
65/* The next macro should declare a variable stacklevel that contains and approximation 166/* we hijack an hopefully unused CV flag for our purposes */
66 * to the current C stack pointer. Its property is that it changes with each call 167#define CVf_SLF 0x4000
67 * and should be unique. */ 168static OP *pp_slf (pTHX);
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69 169
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 170static U32 cctx_gen;
71 171static size_t cctx_stacksize = CORO_STACKSIZE;
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
87static HV *coro_state_stash; 175static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 177
92/* this is actually not only the c stack but also c registers etc... */ 178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
93typedef struct { 213typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 214{
95 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
98 coro_context cctx; 225 coro_context cctx;
99 226
100 void *sptr; 227 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
102} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
103 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
244};
245
246/* the structure where most of the perl state is stored, overlaid on the cxstack */
247typedef struct
248{
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253 HV *hinthv;
254#define VAR(name,type) type name;
255# include "state.h"
256#undef VAR
257} perl_slots;
258
259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
260
261/* this is a structure representing a perl-level coroutine */
104struct coro { 262struct coro {
105 /* the optional C context */ 263 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 264 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 265
110 /* optionally saved, might be zero */ 266 /* ready queue */
111 AV *defav; 267 struct coro *next_ready;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118 268
119 /* the stacks and related info (callchain etc..) */ 269 /* state data */
120 PERL_SI *curstackinfo; 270 struct CoroSLF slf_frame; /* saved slf frame */
121 AV *curstack;
122 AV *mainstack; 271 AV *mainstack;
123 SV **stack_sp; 272 perl_slots *slot; /* basically the saved sp */
124 OP *op; 273
125 SV **curpad; 274 CV *startcv; /* the CV to execute */
126 AV *comppad; 275 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 276 int refcnt; /* coroutines are refcounted, yes */
128 SV **stack_base; 277 int flags; /* CF_ flags */
129 SV **stack_max; 278 HV *hv; /* the perl hash associated with this coro, if any */
130 SV **tmps_stack; 279 void (*on_destroy)(pTHX_ struct coro *coro);
131 I32 tmps_floor; 280
132 I32 tmps_ix; 281 /* statistics */
133 I32 tmps_max; 282 int usecount; /* number of transfers to this coro */
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 283
150 /* coro process data */ 284 /* coro process data */
151 int prio; 285 int prio;
286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
152 288
153 /* data associated with this coroutine (initial args) */ 289 /* async_pool */
154 AV *args; 290 SV *saved_deffh;
155 int refcnt; 291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
297
298 /* linked list */
299 struct coro *next, *prev;
156}; 300};
157 301
158typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
160 304
161static AV * 305/* the following variables are effectively part of the perl context */
162coro_clone_padlist (pTHX_ CV *cv) 306/* and get copied between struct coro and these variables */
163{ 307/* the mainr easonw e don't support windows process emulation */
164 AV *padlist = CvPADLIST (cv); 308static struct CoroSLF slf_frame; /* the current slf frame */
165 AV *newpadlist, *newpad;
166
167 newpadlist = newAV ();
168 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist);
176
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
178 av_store (newpadlist, 1, (SV *)newpad);
179
180 return newpadlist;
181}
182
183static void
184free_padlist (pTHX_ AV *padlist)
185{
186 /* may be during global destruction */
187 if (SvREFCNT (padlist))
188 {
189 I32 i = AvFILLp (padlist);
190 while (i >= 0)
191 {
192 SV **svp = av_fetch (padlist, i--, FALSE);
193 if (svp)
194 {
195 SV *sv;
196 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
197 SvREFCNT_dec (sv);
198
199 SvREFCNT_dec (*svp);
200 }
201 }
202
203 SvREFCNT_dec ((SV*)padlist);
204 }
205}
206
207static int
208coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
209{
210 AV *padlist;
211 AV *av = (AV *)mg->mg_obj;
212
213 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist);
216
217 SvREFCNT_dec (av);
218
219 return 0;
220}
221
222#define PERL_MAGIC_coro PERL_MAGIC_ext
223
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225
226/* the next two functions merely cache the padlists */
227static void
228get_padlist (pTHX_ CV *cv)
229{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
231
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
234 else
235 {
236#if 0
237 /* this should work - but it doesn't :( */
238 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp);
242#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
244#endif
245 }
246}
247
248static void
249put_padlist (pTHX_ CV *cv)
250{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252
253 if (!mg)
254 {
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
262}
263
264#define SB do {
265#define SE } while (0)
266
267#define LOAD(state) load_state(aTHX_ (state));
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
271
272static void
273load_state(pTHX_ Coro__State c)
274{
275 PL_dowarn = c->dowarn;
276 PL_in_eval = c->in_eval;
277
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 PL_top_env = c->top_env;
309
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
313
314 {
315 dSP;
316 CV *cv;
317
318 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs))
320 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist;
327 }
328
329 ++CvDEPTH(cv);
330 }
331
332 PUTBACK;
333 }
334}
335
336static void
337save_state(pTHX_ Coro__State c, int flags)
338{
339 {
340 dSP;
341 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo;
344
345 /*
346 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :(
348 */
349
350 PUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */
352 for (;;)
353 {
354 while (cxix >= 0)
355 {
356 PERL_CONTEXT *cx = &ccstk[cxix--];
357
358 if (CxTYPE(cx) == CXt_SUB)
359 {
360 CV *cv = cx->blk_sub.cv;
361 if (CvDEPTH(cv))
362 {
363 EXTEND (SP, CvDEPTH(cv)*2);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv));
373 PUSHs ((SV *)cv);
374
375 get_padlist (aTHX_ cv);
376 }
377 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 }
387
388 if (top_si->si_type == PERLSI_MAIN)
389 break;
390
391 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix;
394 }
395
396 PUTBACK;
397 }
398
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
402
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp;
410 c->op = PL_op;
411 c->curpad = PL_curpad;
412 c->comppad = PL_comppad;
413 c->compcv = PL_compcv;
414 c->stack_base = PL_stack_base;
415 c->stack_max = PL_stack_max;
416 c->tmps_stack = PL_tmps_stack;
417 c->tmps_floor = PL_tmps_floor;
418 c->tmps_ix = PL_tmps_ix;
419 c->tmps_max = PL_tmps_max;
420 c->markstack = PL_markstack;
421 c->markstack_ptr = PL_markstack_ptr;
422 c->markstack_max = PL_markstack_max;
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436 c->top_env = PL_top_env;
437}
438
439/*
440 * allocate various perl stacks. This is an exact copy
441 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace.
444 */
445static void
446coro_init_stacks (pTHX)
447{
448 LOCK;
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454
455 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458
459 New(50,PL_tmps_stack,96,SV*);
460 PL_tmps_floor = -1;
461 PL_tmps_ix = -1;
462 PL_tmps_max = 96;
463
464 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16;
467
468#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET;
470#endif
471
472 New(54,PL_scopestack,16,I32);
473 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16;
475
476 New(54,PL_savestack,96,ANY);
477 PL_savestack_ix = 0;
478 PL_savestack_max = 96;
479
480#if PERL_VERSION < 9
481 New(54,PL_retstack,8,OP*);
482 PL_retstack_ix = 0;
483 PL_retstack_max = 8;
484#endif
485
486 UNLOCK;
487}
488
489/*
490 * destroy the stacks, the callchain etc...
491 */
492static void
493destroy_stacks(pTHX)
494{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524
525 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p;
528 }
529
530 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack);
532 Safefree (PL_scopestack);
533 Safefree (PL_savestack);
534#if PERL_VERSION < 9
535 Safefree (PL_retstack);
536#endif
537}
538
539static void
540allocate_stack (Coro__State ctx, int alloc)
541{
542 coro_stack *stack;
543
544 New (0, stack, 1, coro_stack);
545
546 stack->refcnt = 1;
547 stack->usecnt = 1;
548 stack->gencnt = ctx->gencnt = 0;
549
550 if (alloc)
551 {
552#if HAVE_MMAP
553 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555 if (stack->sptr != (void *)-1)
556 {
557# if STACKGUARD
558 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
559# endif
560 }
561 else
562#endif
563 {
564 stack->ssize = - (STACKSIZE * (long)sizeof (long));
565 New (0, stack->sptr, STACKSIZE, long);
566 }
567 }
568 else
569 stack->sptr = 0;
570
571 ctx->stack = stack;
572}
573
574static void
575deallocate_stack (Coro__State ctx)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
583 if (!--stack->refcnt)
584 {
585#ifdef HAVE_MMAP
586 if (stack->ssize > 0 && stack->sptr)
587 munmap (stack->sptr, stack->ssize);
588 else
589#endif
590 Safefree (stack->sptr);
591
592 Safefree (stack);
593 }
594 else if (ctx->gencnt == stack->gencnt)
595 --stack->usecnt;
596 }
597}
598
599static void
600setup_coro (void *arg)
601{
602 /*
603 * emulate part of the perl startup here.
604 */
605 dTHX;
606 dSP;
607 Coro__State ctx = (Coro__State)arg;
608 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610 coro_init_stacks (aTHX);
611 /*PL_curcop = 0;*/
612 /*PL_in_eval = PL_in_eval;*/ /* inherit */
613 SvREFCNT_dec (GvAV (PL_defgv));
614 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
615
616 SPAGAIN;
617
618 if (ctx->stack)
619 {
620 ctx->cursp = 0;
621
622 PUSHMARK(SP);
623 PUTBACK;
624 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
625
626 if (SvTRUE (ERRSV))
627 croak (NULL);
628 else
629 croak ("FATAL: CCTXT coroutine returned!");
630 }
631 else
632 {
633 UNOP myop;
634
635 Zero(&myop, 1, UNOP);
636 myop.op_next = Nullop;
637 myop.op_flags = OPf_WANT_VOID;
638
639 PL_op = (OP *)&myop;
640
641 PUSHMARK(SP);
642 XPUSHs (sub_init);
643 /*
644 * the next line is slightly wrong, as PL_op->op_next
645 * is actually being executed so we skip the first op.
646 * that doesn't matter, though, since it is only
647 * pp_nextstate and we never return...
648 * ah yes, and I don't care anyways ;)
649 */
650 PUTBACK;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653
654 ENTER; /* necessary e.g. for dounwind */
655 }
656}
657
658static void
659continue_coro (void *arg)
660{
661 /*
662 * this is a _very_ stripped down perl interpreter ;)
663 */
664 dTHX;
665 Coro__State ctx = (Coro__State)arg;
666
667 PL_top_env = &PL_start_env;
668
669 ctx->cursp = 0;
670 PL_op = PL_op->op_next;
671 CALLRUNOPS(aTHX);
672
673 abort ();
674}
675
676/* never call directly, always through the coro_state_transfer global variable */
677static void
678transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSTACKLEVEL;
681
682 if (prev != next)
683 {
684 /* has this coro been created yet? */
685 if (next->mainstack)
686 {
687 LOCK;
688 SAVE (prev, flags);
689 LOAD (next);
690 UNLOCK;
691
692 /* mark this state as in-use */
693 next->mainstack = 0;
694 next->tmps_ix = -2;
695
696 /* stacklevel changed? if yes, grab the stack for us! */
697 if (flags & TRANSFER_SAVE_CCTXT)
698 {
699 if (!prev->stack)
700 allocate_stack (prev, 0);
701 else if (prev->cursp != stacklevel
702 && prev->stack->usecnt > 1)
703 {
704 prev->gencnt = ++prev->stack->gencnt;
705 prev->stack->usecnt = 1;
706 }
707
708 /* has our stack been invalidated? */
709 if (next->stack && next->stack->gencnt != next->gencnt)
710 {
711 deallocate_stack (next);
712 allocate_stack (next, 1);
713 coro_create (&(next->stack->cctx),
714 continue_coro, (void *)next,
715 next->stack->sptr, labs (next->stack->ssize));
716 }
717
718 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
719 prev->cursp = stacklevel;
720 /* don't add any code here */
721 }
722 else
723 next->cursp = stacklevel;
724 }
725 else if (next->tmps_ix == -2)
726 croak ("tried to transfer to running coroutine");
727 else
728 {
729 LOCK;
730 SAVE (prev, -1); /* first get rid of the old state */
731 UNLOCK;
732
733 /* create the coroutine for the first time */
734 if (flags & TRANSFER_SAVE_CCTXT)
735 {
736 if (!prev->stack)
737 allocate_stack (prev, 0);
738
739 /* the new coroutine starts with start_env again */
740 PL_top_env = &PL_start_env;
741
742 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743 {
744 setup_coro (next);
745 next->cursp = stacklevel;
746
747 prev->stack->refcnt++;
748 prev->stack->usecnt++;
749 next->stack = prev->stack;
750 next->gencnt = prev->gencnt;
751 }
752 else
753 {
754 assert (!next->stack);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 setup_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760 prev->cursp = stacklevel;
761 /* don't add any code here */
762 }
763 }
764 else
765 {
766 setup_coro (next);
767 next->cursp = stacklevel;
768 }
769 }
770 }
771
772 LOCK;
773 if (coro_mortal)
774 {
775 SvREFCNT_dec (coro_mortal);
776 coro_mortal = 0;
777 }
778 UNLOCK;
779}
780
781/* use this function pointer to call the above function */
782/* this is done to increase chances of the compiler not inlining the call */
783void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
784
785#define SV_CORO(sv,func) \
786 do { \
787 if (SvROK (sv)) \
788 sv = SvRV (sv); \
789 \
790 if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791 { \
792 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793 \
794 if (!he) \
795 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796 \
797 (sv) = SvRV (HeVAL(he)); \
798 } \
799 \
800 /* must also be changed inside Coro::Cont::yield */ \
801 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803 \
804 } while(0)
805
806static void
807coro_state_destroy (struct coro *coro)
808{
809 if (coro->refcnt--)
810 return;
811
812 if (coro->mainstack && coro->mainstack != main_mainstack)
813 {
814 struct coro temp;
815
816 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
817 LOAD (aTHX_ coro);
818
819 destroy_stacks (aTHX);
820
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */
822
823 coro->mainstack = 0;
824 }
825
826 deallocate_stack (coro);
827 SvREFCNT_dec (coro->args);
828 Safefree (coro);
829}
830
831static int
832coro_state_clear (SV *sv, MAGIC *mg)
833{
834 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0;
836
837 coro_state_destroy (coro);
838
839 return 0;
840}
841
842static int
843coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
844{
845 struct coro *coro = (struct coro *)mg->mg_ptr;
846
847 ++coro->refcnt;
848
849 return 0;
850}
851
852static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
853
854static struct coro *
855SvSTATE (SV *coro)
856{
857 MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);
858 assert (mg->mg_type == PERL_MAGIC_ext);
859 return (struct coro *)mg->mg_ptr;
860}
861
862static void
863api_transfer (pTHX_ SV *prev, SV *next, int flags)
864{
865 SV_CORO (prev, "Coro::transfer");
866 SV_CORO (next, "Coro::transfer");
867
868 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
869}
870 309
871/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
872 311
873#define PRIO_MAX 3 312#define PRIO_MAX 3
874#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
876#define PRIO_LOW -1 315#define PRIO_LOW -1
877#define PRIO_IDLE -3 316#define PRIO_IDLE -3
878#define PRIO_MIN -4 317#define PRIO_MIN -4
879 318
880/* for Coro.pm */ 319/* for Coro.pm */
881static GV *coro_current, *coro_idle; 320static SV *coro_current;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
883static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
324static struct coro *coro_first;
325#define coro_nready coroapi.nready
884 326
885static void 327/** lowlevel stuff **********************************************************/
886coro_enq (pTHX_ SV *sv)
887{
888 int prio;
889
890 if (SvTYPE (sv) != SVt_PVHV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893 {
894 SV *coro = sv;
895 SV_CORO (coro, "omg");
896 prio = SvSTATE (coro)->prio;
897 }
898
899 av_push (coro_ready [prio - PRIO_MIN], sv);
900 coro_nready++;
901}
902 328
903static SV * 329static SV *
904coro_deq (pTHX_ int min_prio) 330coro_get_sv (pTHX_ const char *name, int create)
905{ 331{
906 int prio = PRIO_MAX - PRIO_MIN; 332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_sv (name, create);
335#endif
336 return get_sv (name, create);
337}
907 338
908 min_prio -= PRIO_MIN; 339static AV *
909 if (min_prio < 0) 340coro_get_av (pTHX_ const char *name, int create)
910 min_prio = 0; 341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_av (name, create);
345#endif
346 return get_av (name, create);
347}
911 348
912 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 349static HV *
913 if (AvFILLp (coro_ready [prio]) >= 0) 350coro_get_hv (pTHX_ const char *name, int create)
914 { 351{
915 coro_nready--; 352#if PERL_VERSION_ATLEAST (5,10,0)
916 return av_shift (coro_ready [prio]); 353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
917 } 354 get_hv (name, create);
355#endif
356 return get_hv (name, create);
357}
918 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
919 return 0; 370 return cv;
920} 371}
921 372
922static void 373/*****************************************************************************/
923api_ready (SV *coro) 374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
924{ 394{
925 dTHX; 395 HV *stash;
396 MAGIC *mg;
926 397
927 if (SvROK (coro)) 398 if (SvROK (coro))
928 coro = SvRV (coro); 399 coro = SvRV (coro);
929 400
930 LOCK; 401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
931 coro_enq (aTHX_ SvREFCNT_inc (coro)); 402 croak ("Coro::State object required");
932 UNLOCK;
933}
934 403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
425static AV *
426coro_derive_padlist (pTHX_ CV *cv)
427{
428 AV *padlist = CvPADLIST (cv);
429 AV *newpadlist, *newpad;
430
431 newpadlist = newAV ();
432 AvREAL_off (newpadlist);
433#if PERL_VERSION_ATLEAST (5,10,0)
434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
435#else
436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
437#endif
438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
439 --AvFILLp (padlist);
440
441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
442 av_store (newpadlist, 1, (SV *)newpad);
443
444 return newpadlist;
445}
446
447static void
448free_padlist (pTHX_ AV *padlist)
449{
450 /* may be during global destruction */
451 if (!IN_DESTRUCT)
452 {
453 I32 i = AvFILLp (padlist);
454
455 while (i > 0) /* special-case index 0 */
456 {
457 /* we try to be extra-careful here */
458 AV *av = (AV *)AvARRAY (padlist)[i--];
459 I32 j = AvFILLp (av);
460
461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
465 SvREFCNT_dec (av);
466 }
467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
471 SvREFCNT_dec ((SV*)padlist);
472 }
473}
474
935static void 475static int
936api_schedule (void) 476coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
937{ 477{
478 AV *padlist;
479 AV *av = (AV *)mg->mg_obj;
480
481 /* casting is fun. */
482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
483 free_padlist (aTHX_ padlist);
484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
487 return 0;
488}
489
490static MGVTBL coro_cv_vtbl = {
491 0, 0, 0, 0,
492 coro_cv_free
493};
494
495/* the next two functions merely cache the padlists */
496static void
497get_padlist (pTHX_ CV *cv)
498{
499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
501
502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
504 else
505 {
506#if CORO_PREFER_PERL_FUNCTIONS
507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
509 CV *cp = Perl_cv_clone (aTHX_ cv);
510 CvPADLIST (cv) = CvPADLIST (cp);
511 CvPADLIST (cp) = 0;
512 SvREFCNT_dec (cp);
513#else
514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
515#endif
516 }
517}
518
519static void
520put_padlist (pTHX_ CV *cv)
521{
522 MAGIC *mg = CORO_MAGIC_cv (cv);
523 AV *av;
524
525 if (expect_false (!mg))
526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
527
528 av = (AV *)mg->mg_obj;
529
530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
531 av_extend (av, AvFILLp (av) + 1);
532
533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
534}
535
536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
542load_perl (pTHX_ Coro__State c)
543{
544 perl_slots *slot = c->slot;
545 c->slot = 0;
546
547 PL_mainstack = c->mainstack;
548
549 GvSV (PL_defgv) = slot->defsv;
550 GvAV (PL_defgv) = slot->defav;
551 GvSV (PL_errgv) = slot->errsv;
552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
554
555 #define VAR(name,type) PL_ ## name = slot->name;
556 # include "state.h"
557 #undef VAR
558
559 {
560 dSP;
561
562 CV *cv;
563
564 /* now do the ugly restore mess */
565 while (expect_true (cv = (CV *)POPs))
566 {
567 put_padlist (aTHX_ cv); /* mark this padlist as available */
568 CvDEPTH (cv) = PTR2IV (POPs);
569 CvPADLIST (cv) = (AV *)POPs;
570 }
571
572 PUTBACK;
573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
585}
586
587static void
588save_perl (pTHX_ Coro__State c)
589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
601 {
602 dSP;
603 I32 cxix = cxstack_ix;
604 PERL_CONTEXT *ccstk = cxstack;
605 PERL_SI *top_si = PL_curstackinfo;
606
607 /*
608 * the worst thing you can imagine happens first - we have to save
609 * (and reinitialize) all cv's in the whole callchain :(
610 */
611
612 XPUSHs (Nullsv);
613 /* this loop was inspired by pp_caller */
614 for (;;)
615 {
616 while (expect_true (cxix >= 0))
617 {
618 PERL_CONTEXT *cx = &ccstk[cxix--];
619
620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
621 {
622 CV *cv = cx->blk_sub.cv;
623
624 if (expect_true (CvDEPTH (cv)))
625 {
626 EXTEND (SP, 3);
627 PUSHs ((SV *)CvPADLIST (cv));
628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
629 PUSHs ((SV *)cv);
630
631 CvDEPTH (cv) = 0;
632 get_padlist (aTHX_ cv);
633 }
634 }
635 }
636
637 if (expect_true (top_si->si_type == PERLSI_MAIN))
638 break;
639
640 top_si = top_si->si_prev;
641 ccstk = top_si->si_cxstack;
642 cxix = top_si->si_cxix;
643 }
644
645 PUTBACK;
646 }
647
648 /* allocate some space on the context stack for our purposes */
649 /* we manually unroll here, as usually 2 slots is enough */
650 if (SLOT_COUNT >= 1) CXINC;
651 if (SLOT_COUNT >= 2) CXINC;
652 if (SLOT_COUNT >= 3) CXINC;
653 {
654 int i;
655 for (i = 3; i < SLOT_COUNT; ++i)
656 CXINC;
657 }
658 cxstack_ix -= SLOT_COUNT; /* undo allocation */
659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
665 slot->defav = GvAV (PL_defgv);
666 slot->defsv = DEFSV;
667 slot->errsv = ERRSV;
668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675}
676
677/*
678 * allocate various perl stacks. This is almost an exact copy
679 * of perl.c:init_stacks, except that it uses less memory
680 * on the (sometimes correct) assumption that coroutines do
681 * not usually need a lot of stackspace.
682 */
683#if CORO_PREFER_PERL_FUNCTIONS
684# define coro_init_stacks(thx) init_stacks ()
685#else
686static void
687coro_init_stacks (pTHX)
688{
689 PL_curstackinfo = new_stackinfo(32, 8);
690 PL_curstackinfo->si_type = PERLSI_MAIN;
691 PL_curstack = PL_curstackinfo->si_stack;
692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
693
694 PL_stack_base = AvARRAY(PL_curstack);
695 PL_stack_sp = PL_stack_base;
696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
697
698 New(50,PL_tmps_stack,32,SV*);
699 PL_tmps_floor = -1;
700 PL_tmps_ix = -1;
701 PL_tmps_max = 32;
702
703 New(54,PL_markstack,16,I32);
704 PL_markstack_ptr = PL_markstack;
705 PL_markstack_max = PL_markstack + 16;
706
707#ifdef SET_MARK_OFFSET
708 SET_MARK_OFFSET;
709#endif
710
711 New(54,PL_scopestack,8,I32);
712 PL_scopestack_ix = 0;
713 PL_scopestack_max = 8;
714
715 New(54,PL_savestack,24,ANY);
716 PL_savestack_ix = 0;
717 PL_savestack_max = 24;
718
719#if !PERL_VERSION_ATLEAST (5,10,0)
720 New(54,PL_retstack,4,OP*);
721 PL_retstack_ix = 0;
722 PL_retstack_max = 4;
723#endif
724}
725#endif
726
727/*
728 * destroy the stacks, the callchain etc...
729 */
730static void
731coro_destruct_stacks (pTHX)
732{
733 while (PL_curstackinfo->si_next)
734 PL_curstackinfo = PL_curstackinfo->si_next;
735
736 while (PL_curstackinfo)
737 {
738 PERL_SI *p = PL_curstackinfo->si_prev;
739
740 if (!IN_DESTRUCT)
741 SvREFCNT_dec (PL_curstackinfo->si_stack);
742
743 Safefree (PL_curstackinfo->si_cxstack);
744 Safefree (PL_curstackinfo);
745 PL_curstackinfo = p;
746 }
747
748 Safefree (PL_tmps_stack);
749 Safefree (PL_markstack);
750 Safefree (PL_scopestack);
751 Safefree (PL_savestack);
752#if !PERL_VERSION_ATLEAST (5,10,0)
753 Safefree (PL_retstack);
754#endif
755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
766static size_t
767coro_rss (pTHX_ struct coro *coro)
768{
769 size_t rss = sizeof (*coro);
770
771 if (coro->mainstack)
772 {
773 if (coro->flags & CF_RUNNING)
774 {
775 #define SYM(sym) PL_ ## sym
776 CORO_RSS;
777 #undef SYM
778 }
779 else
780 {
781 #define SYM(sym) coro->slot->sym
782 CORO_RSS;
783 #undef SYM
784 }
785 }
786
787 return rss;
788}
789
790/** coroutine stack handling ************************************************/
791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
901coro_setup (pTHX_ struct coro *coro)
902{
903 /*
904 * emulate part of the perl startup here.
905 */
906 coro_init_stacks (aTHX);
907
908 PL_runops = RUNOPS_DEFAULT;
909 PL_curcop = &PL_compiling;
910 PL_in_eval = EVAL_NULL;
911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
915 PL_curpm = 0;
916 PL_curpad = 0;
917 PL_localizing = 0;
918 PL_dirty = 0;
919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
928
929 GvSV (PL_defgv) = newSV (0);
930 GvAV (PL_defgv) = coro->args; coro->args = 0;
931 GvSV (PL_errgv) = newSV (0);
932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
934 PL_rs = newSVsv (GvSV (irsgv));
935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
936
937 {
938 dSP;
939 UNOP myop;
940
941 Zero (&myop, 1, UNOP);
942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
944 myop.op_flags = OPf_WANT_VOID;
945
946 PUSHMARK (SP);
947 PUSHs ((SV *)coro->startcv);
948 PUTBACK;
949 PL_op = (OP *)&myop;
950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
951 }
952
953 /* this newly created coroutine might be run on an existing cctx which most
954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
971static void
972coro_unwind_stacks (pTHX)
973{
974 if (!IN_DESTRUCT)
975 {
976 /* restore all saved variables and stuff */
977 LEAVE_SCOPE (0);
978 assert (PL_tmps_floor == -1);
979
980 /* free all temporaries */
981 FREETMPS;
982 assert (PL_tmps_ix == -1);
983
984 /* unwind all extra stacks */
985 POPSTACK_TO (PL_mainstack);
986
987 /* unwind main stack */
988 dounwind (-1);
989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
996
997 SvREFCNT_dec (GvSV (PL_defgv));
998 SvREFCNT_dec (GvAV (PL_defgv));
999 SvREFCNT_dec (GvSV (PL_errgv));
1000 SvREFCNT_dec (PL_defoutgv);
1001 SvREFCNT_dec (PL_rs);
1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
1004
1005 SvREFCNT_dec (PL_diehook);
1006 SvREFCNT_dec (PL_warnhook);
1007
1008 SvREFCNT_dec (coro->saved_deffh);
1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
1012
1013 coro_destruct_stacks (aTHX);
1014}
1015
1016INLINE void
1017free_coro_mortal (pTHX)
1018{
1019 if (expect_true (coro_mortal))
1020 {
1021 SvREFCNT_dec (coro_mortal);
1022 coro_mortal = 0;
1023 }
1024}
1025
1026static int
1027runops_trace (pTHX)
1028{
1029 COP *oldcop = 0;
1030 int oldcxix = -2;
1031
1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1033 {
1034 PERL_ASYNC_CHECK ();
1035
1036 if (cctx_current->flags & CC_TRACE_ALL)
1037 {
1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1039 {
1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1041 SV **bot, **top;
1042 AV *av = newAV (); /* return values */
1043 SV **cb;
1044 dSP;
1045
1046 GV *gv = CvGV (cx->blk_sub.cv);
1047 SV *fullname = sv_2mortal (newSV (0));
1048 if (isGV (gv))
1049 gv_efullname3 (fullname, gv, 0);
1050
1051 bot = PL_stack_base + cx->blk_oldsp + 1;
1052 top = cx->blk_gimme == G_ARRAY ? SP + 1
1053 : cx->blk_gimme == G_SCALAR ? bot + 1
1054 : bot;
1055
1056 av_extend (av, top - bot);
1057 while (bot < top)
1058 av_push (av, SvREFCNT_inc_NN (*bot++));
1059
1060 PL_runops = RUNOPS_DEFAULT;
1061 ENTER;
1062 SAVETMPS;
1063 EXTEND (SP, 3);
1064 PUSHMARK (SP);
1065 PUSHs (&PL_sv_no);
1066 PUSHs (fullname);
1067 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1068 PUTBACK;
1069 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1070 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1071 SPAGAIN;
1072 FREETMPS;
1073 LEAVE;
1074 PL_runops = runops_trace;
1075 }
1076
1077 if (oldcop != PL_curcop)
1078 {
1079 oldcop = PL_curcop;
1080
1081 if (PL_curcop != &PL_compiling)
1082 {
1083 SV **cb;
1084
1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1086 {
1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1088
1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1090 {
1091 dSP;
1092 GV *gv = CvGV (cx->blk_sub.cv);
1093 SV *fullname = sv_2mortal (newSV (0));
1094
1095 if (isGV (gv))
1096 gv_efullname3 (fullname, gv, 0);
1097
1098 PL_runops = RUNOPS_DEFAULT;
1099 ENTER;
1100 SAVETMPS;
1101 EXTEND (SP, 3);
1102 PUSHMARK (SP);
1103 PUSHs (&PL_sv_yes);
1104 PUSHs (fullname);
1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1106 PUTBACK;
1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1109 SPAGAIN;
1110 FREETMPS;
1111 LEAVE;
1112 PL_runops = runops_trace;
1113 }
1114
1115 oldcxix = cxstack_ix;
1116 }
1117
1118 if (cctx_current->flags & CC_TRACE_LINE)
1119 {
1120 dSP;
1121
1122 PL_runops = RUNOPS_DEFAULT;
1123 ENTER;
1124 SAVETMPS;
1125 EXTEND (SP, 3);
1126 PL_runops = RUNOPS_DEFAULT;
1127 PUSHMARK (SP);
1128 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1129 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1130 PUTBACK;
1131 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1132 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1133 SPAGAIN;
1134 FREETMPS;
1135 LEAVE;
1136 PL_runops = runops_trace;
1137 }
1138 }
1139 }
1140 }
1141 }
1142
1143 TAINT_NOT;
1144 return 0;
1145}
1146
1147static struct CoroSLF cctx_ssl_frame;
1148
1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1164static void NOINLINE
1165cctx_prepare (pTHX)
1166{
1167 PL_top_env = &PL_start_env;
1168
1169 if (cctx_current->flags & CC_TRACE)
1170 PL_runops = runops_trace;
1171
1172 /* we already must be executing an SLF op, there is no other valid way
1173 * that can lead to creation of a new cctx */
1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1176
1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1178 cctx_ssl_frame = slf_frame;
1179
1180 slf_frame.prepare = slf_prepare_set_stacklevel;
1181 slf_frame.check = slf_check_set_stacklevel;
1182}
1183
1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
1189}
1190
1191/*
1192 * this is a _very_ stripped down perl interpreter ;)
1193 */
1194static void
1195cctx_run (void *arg)
1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
938 dTHX; 1203 dTHX;
939 1204
940 SV *prev, *next; 1205 /* normally we would need to skip the entersub here */
1206 /* not doing so will re-execute it, which is exactly what we want */
1207 /* PL_nop = PL_nop->op_next */
941 1208
942 LOCK; 1209 /* inject a fake subroutine call to cctx_init */
1210 cctx_prepare (aTHX);
943 1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
1215 /* somebody or something will hit me for both perl_run and PL_restartop */
1216 PL_restartop = PL_op;
1217 perl_run (PL_curinterp);
1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
1224 * If perl-run returns we assume exit() was being called or the coro
1225 * fell off the end, which seems to be the only valid (non-bug)
1226 * reason for perl_run to return. We try to exit by jumping to the
1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
1231 */
1232 PL_top_env = main_top_env;
1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
1235}
1236
1237static coro_cctx *
1238cctx_new ()
1239{
1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
1269 void *stack_start;
1270 size_t stack_size;
1271
1272#if HAVE_MMAP
1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1274 /* mmap supposedly does allocate-on-write for us */
1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1276
1277 if (cctx->sptr != (void *)-1)
1278 {
1279 #if CORO_STACKGUARD
1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1281 #endif
1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1284 cctx->flags |= CC_MAPPED;
1285 }
1286 else
1287#endif
1288 {
1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1290 New (0, cctx->sptr, cctx_stacksize, long);
1291
1292 if (!cctx->sptr)
1293 {
1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1295 _exit (EXIT_FAILURE);
1296 }
1297
1298 stack_start = cctx->sptr;
1299 stack_size = cctx->ssize;
1300 }
1301
1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1307
1308 return cctx;
1309}
1310
1311static void
1312cctx_destroy (coro_cctx *cctx)
1313{
1314 if (!cctx)
1315 return;
1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
1325 #if CORO_USE_VALGRIND
1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1327 #endif
1328
1329#if HAVE_MMAP
1330 if (cctx->flags & CC_MAPPED)
1331 munmap (cctx->sptr, cctx->ssize);
1332 else
1333#endif
1334 Safefree (cctx->sptr);
1335 }
1336
1337 Safefree (cctx);
1338}
1339
1340/* wether this cctx should be destructed */
1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1342
1343static coro_cctx *
1344cctx_get (pTHX)
1345{
1346 while (expect_true (cctx_first))
1347 {
1348 coro_cctx *cctx = cctx_first;
1349 cctx_first = cctx->next;
1350 --cctx_idle;
1351
1352 if (expect_true (!CCTX_EXPIRED (cctx)))
1353 return cctx;
1354
1355 cctx_destroy (cctx);
1356 }
1357
1358 return cctx_new_run ();
1359}
1360
1361static void
1362cctx_put (coro_cctx *cctx)
1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
1366 /* free another cctx if overlimit */
1367 if (expect_false (cctx_idle >= cctx_max_idle))
1368 {
1369 coro_cctx *first = cctx_first;
1370 cctx_first = first->next;
1371 --cctx_idle;
1372
1373 cctx_destroy (first);
1374 }
1375
1376 ++cctx_idle;
1377 cctx->next = cctx_first;
1378 cctx_first = cctx;
1379}
1380
1381/** coroutine switching *****************************************************/
1382
1383static void
1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1388 if (expect_true (prev != next))
1389 {
1390 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1392
1393 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1395
1396#if !PERL_VERSION_ATLEAST (5,10,0)
1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1399#endif
1400 }
1401}
1402
1403/* always use the TRANSFER macro */
1404static void NOINLINE /* noinline so we have a fixed stackframe */
1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1406{
1407 dSTACKLEVEL;
1408
1409 /* sometimes transfer is only called to set idle_sp */
1410 if (expect_false (!prev))
1411 {
1412 cctx_current->idle_sp = STACKLEVEL;
1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1414 }
1415 else if (expect_true (prev != next))
1416 {
1417 coro_cctx *cctx_prev;
1418
1419 if (expect_false (prev->flags & CF_NEW))
1420 {
1421 /* create a new empty/source context */
1422 prev->flags &= ~CF_NEW;
1423 prev->flags |= CF_RUNNING;
1424 }
1425
1426 prev->flags &= ~CF_RUNNING;
1427 next->flags |= CF_RUNNING;
1428
1429 /* first get rid of the old state */
1430 save_perl (aTHX_ prev);
1431
1432 if (expect_false (next->flags & CF_NEW))
1433 {
1434 /* need to start coroutine */
1435 next->flags &= ~CF_NEW;
1436 /* setup coroutine call */
1437 coro_setup (aTHX_ next);
1438 }
1439 else
1440 load_perl (aTHX_ next);
1441
1442 /* possibly untie and reuse the cctx */
1443 if (expect_true (
1444 cctx_current->idle_sp == STACKLEVEL
1445 && !(cctx_current->flags & CC_TRACE)
1446 && !force_cctx
1447 ))
1448 {
1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1450 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1451
1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1455 if (expect_true (!next->cctx))
1456 next->cctx = cctx_get (aTHX);
1457
1458 cctx_put (cctx_current);
1459 }
1460 else
1461 prev->cctx = cctx_current;
1462
1463 ++next->usecount;
1464
1465 cctx_prev = cctx_current;
1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1467
1468 next->cctx = 0;
1469
1470 if (expect_false (cctx_prev != cctx_current))
1471 {
1472 cctx_prev->top_env = PL_top_env;
1473 PL_top_env = cctx_current->top_env;
1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1475 }
1476
1477 transfer_tail (aTHX);
1478 }
1479}
1480
1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1483
1484/** high level stuff ********************************************************/
1485
1486static int
1487coro_state_destroy (pTHX_ struct coro *coro)
1488{
1489 if (coro->flags & CF_DESTROYED)
1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
1494
1495 coro->flags |= CF_DESTROYED;
1496
1497 if (coro->flags & CF_READY)
1498 {
1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
1500 /* alternative: look through all ready queues and remove the coro */
1501 --coro_nready;
1502 }
1503 else
1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1505
1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
1510 {
1511 struct coro *current = SvSTATE_current;
1512
1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1514
1515 save_perl (aTHX_ current);
1516 load_perl (aTHX_ coro);
1517
1518 coro_destruct_perl (aTHX_ coro);
1519
1520 load_perl (aTHX_ current);
1521
1522 coro->slot = 0;
1523 }
1524
1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
1529
1530 if (coro->next) coro->next->prev = coro->prev;
1531 if (coro->prev) coro->prev->next = coro->next;
1532 if (coro == coro_first) coro_first = coro->next;
1533
1534 return 1;
1535}
1536
1537static int
1538coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1539{
1540 struct coro *coro = (struct coro *)mg->mg_ptr;
1541 mg->mg_ptr = 0;
1542
1543 coro->hv = 0;
1544
1545 if (--coro->refcnt < 0)
1546 {
1547 coro_state_destroy (aTHX_ coro);
1548 Safefree (coro);
1549 }
1550
1551 return 0;
1552}
1553
1554static int
1555coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1556{
1557 struct coro *coro = (struct coro *)mg->mg_ptr;
1558
1559 ++coro->refcnt;
1560
1561 return 0;
1562}
1563
1564static MGVTBL coro_state_vtbl = {
1565 0, 0, 0, 0,
1566 coro_state_free,
1567 0,
1568#ifdef MGf_DUP
1569 coro_state_dup,
1570#else
1571# define MGf_DUP 0
1572#endif
1573};
1574
1575static void
1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1577{
1578 ta->prev = SvSTATE (prev_sv);
1579 ta->next = SvSTATE (next_sv);
1580 TRANSFER_CHECK (*ta);
1581}
1582
1583static void
1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1585{
1586 struct coro_transfer_args ta;
1587
1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1589 TRANSFER (ta, 1);
1590}
1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
1600static SV *
1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1602{
1603 CV *cv = (CV *)newSV (0);
1604
1605 sv_upgrade ((SV *)cv, SVt_PVCV);
1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1613}
1614
1615/** Coro ********************************************************************/
1616
1617INLINE void
1618coro_enq (pTHX_ struct coro *coro)
1619{
1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1621
1622 SvREFCNT_inc_NN (coro->hv);
1623
1624 coro->next_ready = 0;
1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1626 ready [1] = coro;
1627}
1628
1629INLINE struct coro *
1630coro_deq (pTHX)
1631{
1632 int prio;
1633
1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1635 {
1636 struct coro **ready = coro_ready [prio];
1637
1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1645}
1646
1647static int
1648api_ready (pTHX_ SV *coro_sv)
1649{
1650 struct coro *coro;
1651 SV *sv_hook;
1652 void (*xs_hook)(void);
1653
1654 coro = SvSTATE (coro_sv);
1655
1656 if (coro->flags & CF_READY)
1657 return 0;
1658
1659 coro->flags |= CF_READY;
1660
1661 sv_hook = coro_nready ? 0 : coro_readyhook;
1662 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1663
1664 coro_enq (aTHX_ coro);
1665 ++coro_nready;
1666
1667 if (sv_hook)
1668 {
1669 dSP;
1670
1671 ENTER;
1672 SAVETMPS;
1673
1674 PUSHMARK (SP);
1675 PUTBACK;
1676 call_sv (sv_hook, G_VOID | G_DISCARD);
1677
1678 FREETMPS;
1679 LEAVE;
1680 }
1681
1682 if (xs_hook)
1683 xs_hook ();
1684
1685 return 1;
1686}
1687
1688static int
1689api_is_ready (pTHX_ SV *coro_sv)
1690{
1691 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1692}
1693
1694/* expects to own a reference to next->hv */
1695INLINE void
1696prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1697{
944 prev = SvRV (GvSV (coro_current)); 1698 SV *prev_sv = SvRV (coro_current);
945 next = coro_deq (aTHX_ PRIO_MIN);
946 1699
947 if (!next) 1700 ta->prev = SvSTATE_hv (prev_sv);
948 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1701 ta->next = next;
949 1702
950 /* free this only after the transfer */ 1703 TRANSFER_CHECK (*ta);
1704
1705 SvRV_set (coro_current, (SV *)next->hv);
1706
1707 free_coro_mortal (aTHX);
951 coro_mortal = prev; 1708 coro_mortal = prev_sv;
952 SV_CORO (prev, "Coro::schedule");
953
954 SvRV (GvSV (coro_current)) = next;
955
956 SV_CORO (next, "Coro::schedule");
957
958 UNLOCK;
959
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962} 1709}
963 1710
964static void 1711static void
965api_cede (void) 1712prepare_schedule (pTHX_ struct coro_transfer_args *ta)
966{ 1713{
967 dTHX; 1714 for (;;)
1715 {
1716 struct coro *next = coro_deq (aTHX);
968 1717
969 LOCK; 1718 if (expect_true (next))
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1719 {
971 UNLOCK; 1720 /* cannot transfer to destroyed coros, skip and look for next */
1721 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1722 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1723 else
1724 {
1725 next->flags &= ~CF_READY;
1726 --coro_nready;
972 1727
1728 prepare_schedule_to (aTHX_ ta, next);
1729 break;
1730 }
1731 }
1732 else
1733 {
1734 /* nothing to schedule: call the idle handler */
1735 if (SvROK (sv_idle)
1736 && SvOBJECT (SvRV (sv_idle)))
1737 {
1738 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1739 api_ready (aTHX_ SvRV (sv_idle));
1740 --coro_nready;
1741 }
1742 else
1743 {
1744 dSP;
1745
1746 ENTER;
1747 SAVETMPS;
1748
1749 PUSHMARK (SP);
1750 PUTBACK;
1751 call_sv (sv_idle, G_VOID | G_DISCARD);
1752
1753 FREETMPS;
1754 LEAVE;
1755 }
1756 }
1757 }
1758}
1759
1760INLINE void
1761prepare_cede (pTHX_ struct coro_transfer_args *ta)
1762{
1763 api_ready (aTHX_ coro_current);
1764 prepare_schedule (aTHX_ ta);
1765}
1766
1767INLINE void
1768prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1769{
1770 SV *prev = SvRV (coro_current);
1771
1772 if (coro_nready)
1773 {
1774 prepare_schedule (aTHX_ ta);
1775 api_ready (aTHX_ prev);
1776 }
1777 else
1778 prepare_nop (aTHX_ ta);
1779}
1780
1781static void
973 api_schedule (); 1782api_schedule (pTHX)
974} 1783{
1784 struct coro_transfer_args ta;
975 1785
1786 prepare_schedule (aTHX_ &ta);
1787 TRANSFER (ta, 1);
1788}
1789
1790static void
1791api_schedule_to (pTHX_ SV *coro_sv)
1792{
1793 struct coro_transfer_args ta;
1794 struct coro *next = SvSTATE (coro_sv);
1795
1796 SvREFCNT_inc_NN (coro_sv);
1797 prepare_schedule_to (aTHX_ &ta, next);
1798}
1799
1800static int
1801api_cede (pTHX)
1802{
1803 struct coro_transfer_args ta;
1804
1805 prepare_cede (aTHX_ &ta);
1806
1807 if (expect_true (ta.prev != ta.next))
1808 {
1809 TRANSFER (ta, 1);
1810 return 1;
1811 }
1812 else
1813 return 0;
1814}
1815
1816static int
1817api_cede_notself (pTHX)
1818{
1819 if (coro_nready)
1820 {
1821 struct coro_transfer_args ta;
1822
1823 prepare_cede_notself (aTHX_ &ta);
1824 TRANSFER (ta, 1);
1825 return 1;
1826 }
1827 else
1828 return 0;
1829}
1830
1831static void
1832api_trace (pTHX_ SV *coro_sv, int flags)
1833{
1834 struct coro *coro = SvSTATE (coro_sv);
1835
1836 if (coro->flags & CF_RUNNING)
1837 croak ("cannot enable tracing on a running coroutine, caught");
1838
1839 if (flags & CC_TRACE)
1840 {
1841 if (!coro->cctx)
1842 coro->cctx = cctx_new_run ();
1843 else if (!(coro->cctx->flags & CC_TRACE))
1844 croak ("cannot enable tracing on coroutine with custom stack, caught");
1845
1846 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1847 }
1848 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1849 {
1850 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1851
1852 if (coro->flags & CF_RUNNING)
1853 PL_runops = RUNOPS_DEFAULT;
1854 else
1855 coro->slot->runops = RUNOPS_DEFAULT;
1856 }
1857}
1858
1859static void
1860coro_call_on_destroy (pTHX_ struct coro *coro)
1861{
1862 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1863 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1864
1865 if (on_destroyp)
1866 {
1867 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1868
1869 while (AvFILLp (on_destroy) >= 0)
1870 {
1871 dSP; /* don't disturb outer sp */
1872 SV *cb = av_pop (on_destroy);
1873
1874 PUSHMARK (SP);
1875
1876 if (statusp)
1877 {
1878 int i;
1879 AV *status = (AV *)SvRV (*statusp);
1880 EXTEND (SP, AvFILLp (status) + 1);
1881
1882 for (i = 0; i <= AvFILLp (status); ++i)
1883 PUSHs (AvARRAY (status)[i]);
1884 }
1885
1886 PUTBACK;
1887 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1888 }
1889 }
1890}
1891
1892static void
1893slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1894{
1895 int i;
1896 HV *hv = (HV *)SvRV (coro_current);
1897 AV *av = newAV ();
1898
1899 av_extend (av, items - 1);
1900 for (i = 0; i < items; ++i)
1901 av_push (av, SvREFCNT_inc_NN (arg [i]));
1902
1903 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1904
1905 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1906 api_ready (aTHX_ sv_manager);
1907
1908 frame->prepare = prepare_schedule;
1909 frame->check = slf_check_repeat;
1910
1911 /* as a minor optimisation, we could unwind all stacks here */
1912 /* but that puts extra pressure on pp_slf, and is not worth much */
1913 /*coro_unwind_stacks (aTHX);*/
1914}
1915
1916/*****************************************************************************/
1917/* async pool handler */
1918
1919static int
1920slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1921{
1922 HV *hv = (HV *)SvRV (coro_current);
1923 struct coro *coro = (struct coro *)frame->data;
1924
1925 if (!coro->invoke_cb)
1926 return 1; /* loop till we have invoke */
1927 else
1928 {
1929 hv_store (hv, "desc", sizeof ("desc") - 1,
1930 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1931
1932 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1933
1934 {
1935 dSP;
1936 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1937 PUTBACK;
1938 }
1939
1940 SvREFCNT_dec (GvAV (PL_defgv));
1941 GvAV (PL_defgv) = coro->invoke_av;
1942 coro->invoke_av = 0;
1943
1944 return 0;
1945 }
1946}
1947
1948static void
1949slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1950{
1951 HV *hv = (HV *)SvRV (coro_current);
1952 struct coro *coro = SvSTATE_hv ((SV *)hv);
1953
1954 if (expect_true (coro->saved_deffh))
1955 {
1956 /* subsequent iteration */
1957 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1958 coro->saved_deffh = 0;
1959
1960 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1961 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1962 {
1963 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1964 coro->invoke_av = newAV ();
1965
1966 frame->prepare = prepare_nop;
1967 }
1968 else
1969 {
1970 av_clear (GvAV (PL_defgv));
1971 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1972
1973 coro->prio = 0;
1974
1975 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1976 api_trace (aTHX_ coro_current, 0);
1977
1978 frame->prepare = prepare_schedule;
1979 av_push (av_async_pool, SvREFCNT_inc (hv));
1980 }
1981 }
1982 else
1983 {
1984 /* first iteration, simply fall through */
1985 frame->prepare = prepare_nop;
1986 }
1987
1988 frame->check = slf_check_pool_handler;
1989 frame->data = (void *)coro;
1990}
1991
1992/*****************************************************************************/
1993/* rouse callback */
1994
1995#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1996
1997static void
1998coro_rouse_callback (pTHX_ CV *cv)
1999{
2000 dXSARGS;
2001 SV *data = (SV *)GENSUB_ARG;
2002
2003 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2004 {
2005 /* first call, set args */
2006 SV *coro = SvRV (data);
2007 AV *av = newAV ();
2008
2009 SvRV_set (data, (SV *)av);
2010
2011 /* better take a full copy of the arguments */
2012 while (items--)
2013 av_store (av, items, newSVsv (ST (items)));
2014
2015 api_ready (aTHX_ coro);
2016 SvREFCNT_dec (coro);
2017 }
2018
2019 XSRETURN_EMPTY;
2020}
2021
2022static int
2023slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2024{
2025 SV *data = (SV *)frame->data;
2026
2027 if (CORO_THROW)
2028 return 0;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 return 1;
2032
2033 /* now push all results on the stack */
2034 {
2035 dSP;
2036 AV *av = (AV *)SvRV (data);
2037 int i;
2038
2039 EXTEND (SP, AvFILLp (av) + 1);
2040 for (i = 0; i <= AvFILLp (av); ++i)
2041 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2042
2043 /* we have stolen the elements, so set length to zero and free */
2044 AvFILLp (av) = -1;
2045 av_undef (av);
2046
2047 PUTBACK;
2048 }
2049
2050 return 0;
2051}
2052
2053static void
2054slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2055{
2056 SV *cb;
2057
2058 if (items)
2059 cb = arg [0];
2060 else
2061 {
2062 struct coro *coro = SvSTATE_current;
2063
2064 if (!coro->rouse_cb)
2065 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2066
2067 cb = sv_2mortal (coro->rouse_cb);
2068 coro->rouse_cb = 0;
2069 }
2070
2071 if (!SvROK (cb)
2072 || SvTYPE (SvRV (cb)) != SVt_PVCV
2073 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2074 croak ("Coro::rouse_wait called with illegal callback argument,");
2075
2076 {
2077 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2078 SV *data = (SV *)GENSUB_ARG;
2079
2080 frame->data = (void *)data;
2081 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2082 frame->check = slf_check_rouse_wait;
2083 }
2084}
2085
2086static SV *
2087coro_new_rouse_cb (pTHX)
2088{
2089 HV *hv = (HV *)SvRV (coro_current);
2090 struct coro *coro = SvSTATE_hv (hv);
2091 SV *data = newRV_inc ((SV *)hv);
2092 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2093
2094 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2095 SvREFCNT_dec (data); /* magicext increases the refcount */
2096
2097 SvREFCNT_dec (coro->rouse_cb);
2098 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2099
2100 return cb;
2101}
2102
2103/*****************************************************************************/
2104/* schedule-like-function opcode (SLF) */
2105
2106static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2107static const CV *slf_cv;
2108static SV **slf_argv;
2109static int slf_argc, slf_arga; /* count, allocated */
2110static I32 slf_ax; /* top of stack, for restore */
2111
2112/* this restores the stack in the case we patched the entersub, to */
2113/* recreate the stack frame as perl will on following calls */
2114/* since entersub cleared the stack */
2115static OP *
2116pp_restore (pTHX)
2117{
2118 int i;
2119 SV **SP = PL_stack_base + slf_ax;
2120
2121 PUSHMARK (SP);
2122
2123 EXTEND (SP, slf_argc + 1);
2124
2125 for (i = 0; i < slf_argc; ++i)
2126 PUSHs (sv_2mortal (slf_argv [i]));
2127
2128 PUSHs ((SV *)CvGV (slf_cv));
2129
2130 RETURNOP (slf_restore.op_first);
2131}
2132
2133static void
2134slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2135{
2136 SV **arg = (SV **)slf_frame.data;
2137
2138 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2139}
2140
2141static void
2142slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2143{
2144 if (items != 2)
2145 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2146
2147 frame->prepare = slf_prepare_transfer;
2148 frame->check = slf_check_nop;
2149 frame->data = (void *)arg; /* let's hope it will stay valid */
2150}
2151
2152static void
2153slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2154{
2155 frame->prepare = prepare_schedule;
2156 frame->check = slf_check_nop;
2157}
2158
2159static void
2160slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2161{
2162 struct coro *next = (struct coro *)slf_frame.data;
2163
2164 SvREFCNT_inc_NN (next->hv);
2165 prepare_schedule_to (aTHX_ ta, next);
2166}
2167
2168static void
2169slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (!items)
2172 croak ("Coro::schedule_to expects a coroutine argument, caught");
2173
2174 frame->data = (void *)SvSTATE (arg [0]);
2175 frame->prepare = slf_prepare_schedule_to;
2176 frame->check = slf_check_nop;
2177}
2178
2179static void
2180slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 api_ready (aTHX_ SvRV (coro_current));
2183
2184 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2185}
2186
2187static void
2188slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2189{
2190 frame->prepare = prepare_cede;
2191 frame->check = slf_check_nop;
2192}
2193
2194static void
2195slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 frame->prepare = prepare_cede_notself;
2198 frame->check = slf_check_nop;
2199}
2200
2201/*
2202 * these not obviously related functions are all rolled into one
2203 * function to increase chances that they all will call transfer with the same
2204 * stack offset
2205 * SLF stands for "schedule-like-function".
2206 */
2207static OP *
2208pp_slf (pTHX)
2209{
2210 I32 checkmark; /* mark SP to see how many elements check has pushed */
2211
2212 /* set up the slf frame, unless it has already been set-up */
2213 /* the latter happens when a new coro has been started */
2214 /* or when a new cctx was attached to an existing coroutine */
2215 if (expect_true (!slf_frame.prepare))
2216 {
2217 /* first iteration */
2218 dSP;
2219 SV **arg = PL_stack_base + TOPMARK + 1;
2220 int items = SP - arg; /* args without function object */
2221 SV *gv = *sp;
2222
2223 /* do a quick consistency check on the "function" object, and if it isn't */
2224 /* for us, divert to the real entersub */
2225 if (SvTYPE (gv) != SVt_PVGV
2226 || !GvCV (gv)
2227 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2228 return PL_ppaddr[OP_ENTERSUB](aTHX);
2229
2230 if (!(PL_op->op_flags & OPf_STACKED))
2231 {
2232 /* ampersand-form of call, use @_ instead of stack */
2233 AV *av = GvAV (PL_defgv);
2234 arg = AvARRAY (av);
2235 items = AvFILLp (av) + 1;
2236 }
2237
2238 /* now call the init function, which needs to set up slf_frame */
2239 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2240 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2241
2242 /* pop args */
2243 SP = PL_stack_base + POPMARK;
2244
2245 PUTBACK;
2246 }
2247
2248 /* now that we have a slf_frame, interpret it! */
2249 /* we use a callback system not to make the code needlessly */
2250 /* complicated, but so we can run multiple perl coros from one cctx */
2251
2252 do
2253 {
2254 struct coro_transfer_args ta;
2255
2256 slf_frame.prepare (aTHX_ &ta);
2257 TRANSFER (ta, 0);
2258
2259 checkmark = PL_stack_sp - PL_stack_base;
2260 }
2261 while (slf_frame.check (aTHX_ &slf_frame));
2262
2263 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2264
2265 /* exception handling */
2266 if (expect_false (CORO_THROW))
2267 {
2268 SV *exception = sv_2mortal (CORO_THROW);
2269
2270 CORO_THROW = 0;
2271 sv_setsv (ERRSV, exception);
2272 croak (0);
2273 }
2274
2275 /* return value handling - mostly like entersub */
2276 /* make sure we put something on the stack in scalar context */
2277 if (GIMME_V == G_SCALAR)
2278 {
2279 dSP;
2280 SV **bot = PL_stack_base + checkmark;
2281
2282 if (sp == bot) /* too few, push undef */
2283 bot [1] = &PL_sv_undef;
2284 else if (sp != bot + 1) /* too many, take last one */
2285 bot [1] = *sp;
2286
2287 SP = bot + 1;
2288
2289 PUTBACK;
2290 }
2291
2292 return NORMAL;
2293}
2294
2295static void
2296api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2297{
2298 int i;
2299 SV **arg = PL_stack_base + ax;
2300 int items = PL_stack_sp - arg + 1;
2301
2302 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2303
2304 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2305 && PL_op->op_ppaddr != pp_slf)
2306 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2307
2308 CvFLAGS (cv) |= CVf_SLF;
2309 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2310 slf_cv = cv;
2311
2312 /* we patch the op, and then re-run the whole call */
2313 /* we have to put the same argument on the stack for this to work */
2314 /* and this will be done by pp_restore */
2315 slf_restore.op_next = (OP *)&slf_restore;
2316 slf_restore.op_type = OP_CUSTOM;
2317 slf_restore.op_ppaddr = pp_restore;
2318 slf_restore.op_first = PL_op;
2319
2320 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2321
2322 if (PL_op->op_flags & OPf_STACKED)
2323 {
2324 if (items > slf_arga)
2325 {
2326 slf_arga = items;
2327 free (slf_argv);
2328 slf_argv = malloc (slf_arga * sizeof (SV *));
2329 }
2330
2331 slf_argc = items;
2332
2333 for (i = 0; i < items; ++i)
2334 slf_argv [i] = SvREFCNT_inc (arg [i]);
2335 }
2336 else
2337 slf_argc = 0;
2338
2339 PL_op->op_ppaddr = pp_slf;
2340 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2341
2342 PL_op = (OP *)&slf_restore;
2343}
2344
2345/*****************************************************************************/
2346/* dynamic wind */
2347
2348static void
2349on_enterleave_call (pTHX_ SV *cb)
2350{
2351 dSP;
2352
2353 PUSHSTACK;
2354
2355 PUSHMARK (SP);
2356 PUTBACK;
2357 call_sv (cb, G_VOID | G_DISCARD);
2358 SPAGAIN;
2359
2360 POPSTACK;
2361}
2362
2363static SV *
2364coro_avp_pop_and_free (pTHX_ AV **avp)
2365{
2366 AV *av = *avp;
2367 SV *res = av_pop (av);
2368
2369 if (AvFILLp (av) < 0)
2370 {
2371 *avp = 0;
2372 SvREFCNT_dec (av);
2373 }
2374
2375 return res;
2376}
2377
2378static void
2379coro_pop_on_enter (pTHX_ void *coro)
2380{
2381 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2382 SvREFCNT_dec (cb);
2383}
2384
2385static void
2386coro_pop_on_leave (pTHX_ void *coro)
2387{
2388 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2389 on_enterleave_call (aTHX_ sv_2mortal (cb));
2390}
2391
2392/*****************************************************************************/
2393/* PerlIO::cede */
2394
2395typedef struct
2396{
2397 PerlIOBuf base;
2398 NV next, every;
2399} PerlIOCede;
2400
2401static IV
2402PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2403{
2404 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2405
2406 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2407 self->next = nvtime () + self->every;
2408
2409 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2410}
2411
2412static SV *
2413PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2414{
2415 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2416
2417 return newSVnv (self->every);
2418}
2419
2420static IV
2421PerlIOCede_flush (pTHX_ PerlIO *f)
2422{
2423 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2424 double now = nvtime ();
2425
2426 if (now >= self->next)
2427 {
2428 api_cede (aTHX);
2429 self->next = now + self->every;
2430 }
2431
2432 return PerlIOBuf_flush (aTHX_ f);
2433}
2434
2435static PerlIO_funcs PerlIO_cede =
2436{
2437 sizeof(PerlIO_funcs),
2438 "cede",
2439 sizeof(PerlIOCede),
2440 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2441 PerlIOCede_pushed,
2442 PerlIOBuf_popped,
2443 PerlIOBuf_open,
2444 PerlIOBase_binmode,
2445 PerlIOCede_getarg,
2446 PerlIOBase_fileno,
2447 PerlIOBuf_dup,
2448 PerlIOBuf_read,
2449 PerlIOBuf_unread,
2450 PerlIOBuf_write,
2451 PerlIOBuf_seek,
2452 PerlIOBuf_tell,
2453 PerlIOBuf_close,
2454 PerlIOCede_flush,
2455 PerlIOBuf_fill,
2456 PerlIOBase_eof,
2457 PerlIOBase_error,
2458 PerlIOBase_clearerr,
2459 PerlIOBase_setlinebuf,
2460 PerlIOBuf_get_base,
2461 PerlIOBuf_bufsiz,
2462 PerlIOBuf_get_ptr,
2463 PerlIOBuf_get_cnt,
2464 PerlIOBuf_set_ptrcnt,
2465};
2466
2467/*****************************************************************************/
2468/* Coro::Semaphore & Coro::Signal */
2469
2470static SV *
2471coro_waitarray_new (pTHX_ int count)
2472{
2473 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2474 AV *av = newAV ();
2475 SV **ary;
2476
2477 /* unfortunately, building manually saves memory */
2478 Newx (ary, 2, SV *);
2479 AvALLOC (av) = ary;
2480#if PERL_VERSION_ATLEAST (5,10,0)
2481 AvARRAY (av) = ary;
2482#else
2483 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2484 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2485 SvPVX ((SV *)av) = (char *)ary;
2486#endif
2487 AvMAX (av) = 1;
2488 AvFILLp (av) = 0;
2489 ary [0] = newSViv (count);
2490
2491 return newRV_noinc ((SV *)av);
2492}
2493
2494/* semaphore */
2495
2496static void
2497coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2498{
2499 SV *count_sv = AvARRAY (av)[0];
2500 IV count = SvIVX (count_sv);
2501
2502 count += adjust;
2503 SvIVX (count_sv) = count;
2504
2505 /* now wake up as many waiters as are expected to lock */
2506 while (count > 0 && AvFILLp (av) > 0)
2507 {
2508 SV *cb;
2509
2510 /* swap first two elements so we can shift a waiter */
2511 AvARRAY (av)[0] = AvARRAY (av)[1];
2512 AvARRAY (av)[1] = count_sv;
2513 cb = av_shift (av);
2514
2515 if (SvOBJECT (cb))
2516 {
2517 api_ready (aTHX_ cb);
2518 --count;
2519 }
2520 else if (SvTYPE (cb) == SVt_PVCV)
2521 {
2522 dSP;
2523 PUSHMARK (SP);
2524 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2525 PUTBACK;
2526 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2527 }
2528
2529 SvREFCNT_dec (cb);
2530 }
2531}
2532
2533static void
2534coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2535{
2536 /* call $sem->adjust (0) to possibly wake up some other waiters */
2537 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2538}
2539
2540static int
2541slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2542{
2543 AV *av = (AV *)frame->data;
2544 SV *count_sv = AvARRAY (av)[0];
2545
2546 /* if we are about to throw, don't actually acquire the lock, just throw */
2547 if (CORO_THROW)
2548 return 0;
2549 else if (SvIVX (count_sv) > 0)
2550 {
2551 SvSTATE_current->on_destroy = 0;
2552
2553 if (acquire)
2554 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2555 else
2556 coro_semaphore_adjust (aTHX_ av, 0);
2557
2558 return 0;
2559 }
2560 else
2561 {
2562 int i;
2563 /* if we were woken up but can't down, we look through the whole */
2564 /* waiters list and only add us if we aren't in there already */
2565 /* this avoids some degenerate memory usage cases */
2566
2567 for (i = 1; i <= AvFILLp (av); ++i)
2568 if (AvARRAY (av)[i] == SvRV (coro_current))
2569 return 1;
2570
2571 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2572 return 1;
2573 }
2574}
2575
2576static int
2577slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2578{
2579 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2580}
2581
2582static int
2583slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2584{
2585 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2586}
2587
2588static void
2589slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2590{
2591 AV *av = (AV *)SvRV (arg [0]);
2592
2593 if (SvIVX (AvARRAY (av)[0]) > 0)
2594 {
2595 frame->data = (void *)av;
2596 frame->prepare = prepare_nop;
2597 }
2598 else
2599 {
2600 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2601
2602 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2603 frame->prepare = prepare_schedule;
2604
2605 /* to avoid race conditions when a woken-up coro gets terminated */
2606 /* we arrange for a temporary on_destroy that calls adjust (0) */
2607 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2608 }
2609}
2610
2611static void
2612slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2615 frame->check = slf_check_semaphore_down;
2616}
2617
2618static void
2619slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2620{
2621 if (items >= 2)
2622 {
2623 /* callback form */
2624 AV *av = (AV *)SvRV (arg [0]);
2625 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2626
2627 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2628
2629 if (SvIVX (AvARRAY (av)[0]) > 0)
2630 coro_semaphore_adjust (aTHX_ av, 0);
2631
2632 frame->prepare = prepare_nop;
2633 frame->check = slf_check_nop;
2634 }
2635 else
2636 {
2637 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2638 frame->check = slf_check_semaphore_wait;
2639 }
2640}
2641
2642/* signal */
2643
2644static void
2645coro_signal_wake (pTHX_ AV *av, int count)
2646{
2647 SvIVX (AvARRAY (av)[0]) = 0;
2648
2649 /* now signal count waiters */
2650 while (count > 0 && AvFILLp (av) > 0)
2651 {
2652 SV *cb;
2653
2654 /* swap first two elements so we can shift a waiter */
2655 cb = AvARRAY (av)[0];
2656 AvARRAY (av)[0] = AvARRAY (av)[1];
2657 AvARRAY (av)[1] = cb;
2658
2659 cb = av_shift (av);
2660
2661 api_ready (aTHX_ cb);
2662 sv_setiv (cb, 0); /* signal waiter */
2663 SvREFCNT_dec (cb);
2664
2665 --count;
2666 }
2667}
2668
2669static int
2670slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2671{
2672 /* if we are about to throw, also stop waiting */
2673 return SvROK ((SV *)frame->data) && !CORO_THROW;
2674}
2675
2676static void
2677slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2678{
2679 AV *av = (AV *)SvRV (arg [0]);
2680
2681 if (SvIVX (AvARRAY (av)[0]))
2682 {
2683 SvIVX (AvARRAY (av)[0]) = 0;
2684 frame->prepare = prepare_nop;
2685 frame->check = slf_check_nop;
2686 }
2687 else
2688 {
2689 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2690
2691 av_push (av, waiter);
2692
2693 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2694 frame->prepare = prepare_schedule;
2695 frame->check = slf_check_signal_wait;
2696 }
2697}
2698
2699/*****************************************************************************/
2700/* Coro::AIO */
2701
2702#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2703
2704/* helper storage struct */
2705struct io_state
2706{
2707 int errorno;
2708 I32 laststype; /* U16 in 5.10.0 */
2709 int laststatval;
2710 Stat_t statcache;
2711};
2712
2713static void
2714coro_aio_callback (pTHX_ CV *cv)
2715{
2716 dXSARGS;
2717 AV *state = (AV *)GENSUB_ARG;
2718 SV *coro = av_pop (state);
2719 SV *data_sv = newSV (sizeof (struct io_state));
2720
2721 av_extend (state, items - 1);
2722
2723 sv_upgrade (data_sv, SVt_PV);
2724 SvCUR_set (data_sv, sizeof (struct io_state));
2725 SvPOK_only (data_sv);
2726
2727 {
2728 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2729
2730 data->errorno = errno;
2731 data->laststype = PL_laststype;
2732 data->laststatval = PL_laststatval;
2733 data->statcache = PL_statcache;
2734 }
2735
2736 /* now build the result vector out of all the parameters and the data_sv */
2737 {
2738 int i;
2739
2740 for (i = 0; i < items; ++i)
2741 av_push (state, SvREFCNT_inc_NN (ST (i)));
2742 }
2743
2744 av_push (state, data_sv);
2745
2746 api_ready (aTHX_ coro);
2747 SvREFCNT_dec (coro);
2748 SvREFCNT_dec ((AV *)state);
2749}
2750
2751static int
2752slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2753{
2754 AV *state = (AV *)frame->data;
2755
2756 /* if we are about to throw, return early */
2757 /* this does not cancel the aio request, but at least */
2758 /* it quickly returns */
2759 if (CORO_THROW)
2760 return 0;
2761
2762 /* one element that is an RV? repeat! */
2763 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2764 return 1;
2765
2766 /* restore status */
2767 {
2768 SV *data_sv = av_pop (state);
2769 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2770
2771 errno = data->errorno;
2772 PL_laststype = data->laststype;
2773 PL_laststatval = data->laststatval;
2774 PL_statcache = data->statcache;
2775
2776 SvREFCNT_dec (data_sv);
2777 }
2778
2779 /* push result values */
2780 {
2781 dSP;
2782 int i;
2783
2784 EXTEND (SP, AvFILLp (state) + 1);
2785 for (i = 0; i <= AvFILLp (state); ++i)
2786 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2787
2788 PUTBACK;
2789 }
2790
2791 return 0;
2792}
2793
2794static void
2795slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2796{
2797 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2798 SV *coro_hv = SvRV (coro_current);
2799 struct coro *coro = SvSTATE_hv (coro_hv);
2800
2801 /* put our coroutine id on the state arg */
2802 av_push (state, SvREFCNT_inc_NN (coro_hv));
2803
2804 /* first see whether we have a non-zero priority and set it as AIO prio */
2805 if (coro->prio)
2806 {
2807 dSP;
2808
2809 static SV *prio_cv;
2810 static SV *prio_sv;
2811
2812 if (expect_false (!prio_cv))
2813 {
2814 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2815 prio_sv = newSViv (0);
2816 }
2817
2818 PUSHMARK (SP);
2819 sv_setiv (prio_sv, coro->prio);
2820 XPUSHs (prio_sv);
2821
2822 PUTBACK;
2823 call_sv (prio_cv, G_VOID | G_DISCARD);
2824 }
2825
2826 /* now call the original request */
2827 {
2828 dSP;
2829 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2830 int i;
2831
2832 PUSHMARK (SP);
2833
2834 /* first push all args to the stack */
2835 EXTEND (SP, items + 1);
2836
2837 for (i = 0; i < items; ++i)
2838 PUSHs (arg [i]);
2839
2840 /* now push the callback closure */
2841 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2842
2843 /* now call the AIO function - we assume our request is uncancelable */
2844 PUTBACK;
2845 call_sv ((SV *)req, G_VOID | G_DISCARD);
2846 }
2847
2848 /* now that the requets is going, we loop toll we have a result */
2849 frame->data = (void *)state;
2850 frame->prepare = prepare_schedule;
2851 frame->check = slf_check_aio_req;
2852}
2853
2854static void
2855coro_aio_req_xs (pTHX_ CV *cv)
2856{
2857 dXSARGS;
2858
2859 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2860
2861 XSRETURN_EMPTY;
2862}
2863
2864/*****************************************************************************/
2865
2866#if CORO_CLONE
2867# include "clone.c"
2868#endif
2869
976MODULE = Coro::State PACKAGE = Coro::State 2870MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 2871
978PROTOTYPES: DISABLE 2872PROTOTYPES: DISABLE
979 2873
980BOOT: 2874BOOT:
981{ /* {} necessary for stoopid perl-5.6.x */ 2875{
982#ifdef USE_ITHREADS 2876#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 2877# if CORO_PTHREAD
2878 coro_thx = PERL_GET_CONTEXT;
2879# endif
984#endif 2880#endif
985 BOOT_PAGESIZE; 2881 BOOT_PAGESIZE;
986 2882
987 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2883 cctx_current = cctx_new_empty ();
988 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2884
2885 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2886 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2887
2888 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2889 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2890 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2891
2892 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2893 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2894 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2895
989 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2896 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990 2897
991 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2898 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2899 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2900 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2901 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995 2902
996 main_mainstack = PL_mainstack; 2903 main_mainstack = PL_mainstack;
2904 main_top_env = PL_top_env;
997 2905
2906 while (main_top_env->je_prev)
2907 main_top_env = main_top_env->je_prev;
2908
2909 {
2910 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2911
2912 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2913 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2914
2915 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2916 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2917 }
2918
998 coroapi.ver = CORO_API_VERSION; 2919 coroapi.ver = CORO_API_VERSION;
2920 coroapi.rev = CORO_API_REVISION;
2921
999 coroapi.transfer = api_transfer; 2922 coroapi.transfer = api_transfer;
2923
2924 coroapi.sv_state = SvSTATE_;
2925 coroapi.execute_slf = api_execute_slf;
2926 coroapi.prepare_nop = prepare_nop;
2927 coroapi.prepare_schedule = prepare_schedule;
2928 coroapi.prepare_cede = prepare_cede;
2929 coroapi.prepare_cede_notself = prepare_cede_notself;
2930
2931 {
2932 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2933
2934 if (!svp) croak ("Time::HiRes is required");
2935 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2936
2937 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2938 }
1000 2939
1001 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2940 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1002} 2941}
1003 2942
1004SV * 2943SV *
1005new (char *klass, ...) 2944new (char *klass, ...)
2945 ALIAS:
2946 Coro::new = 1
1006 CODE: 2947 CODE:
1007{ 2948{
1008 struct coro *coro; 2949 struct coro *coro;
2950 MAGIC *mg;
1009 HV *hv; 2951 HV *hv;
2952 CV *cb;
1010 int i; 2953 int i;
1011 2954
2955 if (items > 1)
2956 {
2957 cb = coro_sv_2cv (aTHX_ ST (1));
2958
2959 if (!ix)
2960 {
2961 if (CvISXSUB (cb))
2962 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2963
2964 if (!CvROOT (cb))
2965 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2966 }
2967 }
2968
1012 Newz (0, coro, 1, struct coro); 2969 Newz (0, coro, 1, struct coro);
1013 coro->args = newAV (); 2970 coro->args = newAV ();
2971 coro->flags = CF_NEW;
1014 2972
1015 for (i = 1; i < items; i++) 2973 if (coro_first) coro_first->prev = coro;
1016 av_push (coro->args, newSVsv (ST (i))); 2974 coro->next = coro_first;
2975 coro_first = coro;
1017 2976
1018 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1019 /*coro->stack = 0;*/
1020
1021 hv = newHV (); 2977 coro->hv = hv = newHV ();
1022 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2978 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2979 mg->mg_flags |= MGf_DUP;
1023 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2980 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2981
2982 if (items > 1)
2983 {
2984 av_extend (coro->args, items - 1 + ix - 1);
2985
2986 if (ix)
2987 {
2988 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2989 cb = cv_coro_run;
2990 }
2991
2992 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2993
2994 for (i = 2; i < items; i++)
2995 av_push (coro->args, newSVsv (ST (i)));
2996 }
1024} 2997}
1025 OUTPUT: 2998 OUTPUT:
1026 RETVAL 2999 RETVAL
1027 3000
1028void 3001void
1029transfer(prev, next, flags) 3002transfer (...)
1030 SV *prev 3003 PROTOTYPE: $$
1031 SV *next 3004 CODE:
1032 int flags 3005 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3006
3007bool
3008_destroy (SV *coro_sv)
3009 CODE:
3010 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3011 OUTPUT:
3012 RETVAL
3013
3014void
3015_exit (int code)
3016 PROTOTYPE: $
3017 CODE:
3018 _exit (code);
3019
3020SV *
3021clone (Coro::State coro)
3022 CODE:
3023{
3024#if CORO_CLONE
3025 struct coro *ncoro = coro_clone (aTHX_ coro);
3026 MAGIC *mg;
3027 /* TODO: too much duplication */
3028 ncoro->hv = newHV ();
3029 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3030 mg->mg_flags |= MGf_DUP;
3031 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3032#else
3033 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3034#endif
3035}
3036 OUTPUT:
3037 RETVAL
3038
3039int
3040cctx_stacksize (int new_stacksize = 0)
3041 PROTOTYPE: ;$
3042 CODE:
3043 RETVAL = cctx_stacksize;
3044 if (new_stacksize)
3045 {
3046 cctx_stacksize = new_stacksize;
3047 ++cctx_gen;
3048 }
3049 OUTPUT:
3050 RETVAL
3051
3052int
3053cctx_max_idle (int max_idle = 0)
3054 PROTOTYPE: ;$
3055 CODE:
3056 RETVAL = cctx_max_idle;
3057 if (max_idle > 1)
3058 cctx_max_idle = max_idle;
3059 OUTPUT:
3060 RETVAL
3061
3062int
3063cctx_count ()
3064 PROTOTYPE:
3065 CODE:
3066 RETVAL = cctx_count;
3067 OUTPUT:
3068 RETVAL
3069
3070int
3071cctx_idle ()
3072 PROTOTYPE:
3073 CODE:
3074 RETVAL = cctx_idle;
3075 OUTPUT:
3076 RETVAL
3077
3078void
3079list ()
3080 PROTOTYPE:
3081 PPCODE:
3082{
3083 struct coro *coro;
3084 for (coro = coro_first; coro; coro = coro->next)
3085 if (coro->hv)
3086 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3087}
3088
3089void
3090call (Coro::State coro, SV *coderef)
3091 ALIAS:
3092 eval = 1
3093 CODE:
3094{
3095 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3096 {
3097 struct coro *current = SvSTATE_current;
3098
3099 if (current != coro)
3100 {
3101 PUTBACK;
3102 save_perl (aTHX_ current);
3103 load_perl (aTHX_ coro);
3104 SPAGAIN;
3105 }
3106
3107 PUSHSTACK;
3108
3109 PUSHMARK (SP);
3110 PUTBACK;
3111
3112 if (ix)
3113 eval_sv (coderef, 0);
3114 else
3115 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3116
3117 POPSTACK;
3118 SPAGAIN;
3119
3120 if (current != coro)
3121 {
3122 PUTBACK;
3123 save_perl (aTHX_ coro);
3124 load_perl (aTHX_ current);
3125 SPAGAIN;
3126 }
3127 }
3128}
3129
3130SV *
3131is_ready (Coro::State coro)
3132 PROTOTYPE: $
3133 ALIAS:
3134 is_ready = CF_READY
3135 is_running = CF_RUNNING
3136 is_new = CF_NEW
3137 is_destroyed = CF_DESTROYED
3138 is_suspended = CF_SUSPENDED
3139 CODE:
3140 RETVAL = boolSV (coro->flags & ix);
3141 OUTPUT:
3142 RETVAL
3143
3144void
3145throw (Coro::State self, SV *throw = &PL_sv_undef)
3146 PROTOTYPE: $;$
1033 CODE: 3147 CODE:
1034 PUTBACK; 3148{
1035 SV_CORO (next, "Coro::transfer"); 3149 struct coro *current = SvSTATE_current;
1036 SV_CORO (prev, "Coro::transfer"); 3150 SV **throwp = self == current ? &CORO_THROW : &self->except;
1037 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3151 SvREFCNT_dec (*throwp);
1038 SPAGAIN; 3152 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3153}
3154
3155void
3156api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3157 PROTOTYPE: $;$
3158 C_ARGS: aTHX_ coro, flags
3159
3160SV *
3161has_cctx (Coro::State coro)
3162 PROTOTYPE: $
3163 CODE:
3164 /* maybe manage the running flag differently */
3165 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3166 OUTPUT:
3167 RETVAL
3168
3169int
3170is_traced (Coro::State coro)
3171 PROTOTYPE: $
3172 CODE:
3173 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3174 OUTPUT:
3175 RETVAL
3176
3177UV
3178rss (Coro::State coro)
3179 PROTOTYPE: $
3180 ALIAS:
3181 usecount = 1
3182 CODE:
3183 switch (ix)
3184 {
3185 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3186 case 1: RETVAL = coro->usecount; break;
3187 }
3188 OUTPUT:
3189 RETVAL
3190
3191void
3192force_cctx ()
3193 PROTOTYPE:
3194 CODE:
3195 cctx_current->idle_sp = 0;
3196
3197void
3198swap_defsv (Coro::State self)
3199 PROTOTYPE: $
3200 ALIAS:
3201 swap_defav = 1
3202 CODE:
3203 if (!self->slot)
3204 croak ("cannot swap state with coroutine that has no saved state,");
3205 else
3206 {
3207 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3208 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3209
3210 SV *tmp = *src; *src = *dst; *dst = tmp;
3211 }
3212
3213void
3214cancel (Coro::State self)
3215 CODE:
3216 coro_state_destroy (aTHX_ self);
3217 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3218
3219
3220MODULE = Coro::State PACKAGE = Coro
3221
3222BOOT:
3223{
3224 int i;
3225
3226 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3227 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3228 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3229 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3230 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3231 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3232 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3233 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3234 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3235
3236 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3237 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3238 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3239 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3240
3241 coro_stash = gv_stashpv ("Coro", TRUE);
3242
3243 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3244 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3245 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3246 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3247 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3248 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3249
3250 {
3251 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3252
3253 coroapi.schedule = api_schedule;
3254 coroapi.schedule_to = api_schedule_to;
3255 coroapi.cede = api_cede;
3256 coroapi.cede_notself = api_cede_notself;
3257 coroapi.ready = api_ready;
3258 coroapi.is_ready = api_is_ready;
3259 coroapi.nready = coro_nready;
3260 coroapi.current = coro_current;
3261
3262 /*GCoroAPI = &coroapi;*/
3263 sv_setiv (sv, (IV)&coroapi);
3264 SvREADONLY_on (sv);
3265 }
3266}
3267
3268void
3269terminate (...)
3270 CODE:
3271 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3272
3273void
3274schedule (...)
3275 CODE:
3276 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3277
3278void
3279schedule_to (...)
3280 CODE:
3281 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3282
3283void
3284cede_to (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3287
3288void
3289cede (...)
3290 CODE:
3291 CORO_EXECUTE_SLF_XS (slf_init_cede);
3292
3293void
3294cede_notself (...)
3295 CODE:
3296 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3297
3298void
3299_set_current (SV *current)
3300 PROTOTYPE: $
3301 CODE:
3302 SvREFCNT_dec (SvRV (coro_current));
3303 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3304
3305void
3306_set_readyhook (SV *hook)
3307 PROTOTYPE: $
3308 CODE:
3309 SvREFCNT_dec (coro_readyhook);
3310 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1039 3311
1040int 3312int
1041prio (Coro::State coro, int newprio = 0) 3313prio (Coro::State coro, int newprio = 0)
3314 PROTOTYPE: $;$
1042 ALIAS: 3315 ALIAS:
1043 nice = 1 3316 nice = 1
1044 CODE: 3317 CODE:
1045{ 3318{
1046 RETVAL = coro->prio; 3319 RETVAL = coro->prio;
1047 3320
1048 if (items > 1) 3321 if (items > 1)
1049 { 3322 {
1050 if (ix) 3323 if (ix)
1051 newprio += coro->prio; 3324 newprio = coro->prio - newprio;
1052 3325
1053 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3326 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1054 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3327 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1055 3328
1056 coro->prio = newprio; 3329 coro->prio = newprio;
1057 } 3330 }
1058} 3331}
3332 OUTPUT:
3333 RETVAL
1059 3334
1060void 3335SV *
1061_clone_state_from (SV *dst, SV *src) 3336ready (SV *self)
1062 CODE:
1063{
1064 struct coro *coro_src = SvSTATE (src);
1065
1066 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068 ++coro_src->refcnt;
1069 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070}
1071
1072void
1073_exit (code)
1074 int code
1075 PROTOTYPE: $ 3337 PROTOTYPE: $
1076 CODE: 3338 CODE:
1077 _exit (code); 3339 RETVAL = boolSV (api_ready (aTHX_ self));
1078 3340 OUTPUT:
1079MODULE = Coro::State PACKAGE = Coro::Cont 3341 RETVAL
1080
1081void
1082yield (...)
1083 PROTOTYPE: @
1084 CODE:
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 struct coro *prev, *next;
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105 SvREFCNT_dec (sv);
1106
1107 coro_state_transfer (aTHX_ prev, next, 0);
1108
1109MODULE = Coro::State PACKAGE = Coro
1110
1111BOOT:
1112{
1113 int i;
1114 HV *stash = gv_stashpv ("Coro", TRUE);
1115
1116 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125
1126 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127 coro_ready[i] = newAV ();
1128
1129 {
1130 SV *sv = perl_get_sv("Coro::API", 1);
1131
1132 coroapi.schedule = api_schedule;
1133 coroapi.cede = api_cede;
1134 coroapi.ready = api_ready;
1135 coroapi.nready = &coro_nready;
1136 coroapi.current = coro_current;
1137
1138 GCoroAPI = &coroapi;
1139 sv_setiv (sv, (IV)&coroapi);
1140 SvREADONLY_on (sv);
1141 }
1142}
1143
1144#if !PERL_MICRO
1145
1146void
1147ready (self)
1148 SV * self
1149 PROTOTYPE: $
1150 CODE:
1151 api_ready (self);
1152
1153#endif
1154 3342
1155int 3343int
1156nready (...) 3344nready (...)
1157 PROTOTYPE: 3345 PROTOTYPE:
1158 CODE: 3346 CODE:
1159 RETVAL = coro_nready; 3347 RETVAL = coro_nready;
1160 OUTPUT: 3348 OUTPUT:
1161 RETVAL 3349 RETVAL
1162 3350
1163void 3351void
1164schedule (...) 3352suspend (Coro::State self)
1165 PROTOTYPE: 3353 PROTOTYPE: $
1166 CODE: 3354 CODE:
1167 api_schedule (); 3355 self->flags |= CF_SUSPENDED;
1168 3356
1169void 3357void
1170cede (...) 3358resume (Coro::State self)
1171 PROTOTYPE: 3359 PROTOTYPE: $
1172 CODE: 3360 CODE:
1173 api_cede (); 3361 self->flags &= ~CF_SUSPENDED;
1174 3362
1175# and these are hacks 3363void
3364_pool_handler (...)
3365 CODE:
3366 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3367
3368void
3369async_pool (SV *cv, ...)
3370 PROTOTYPE: &@
3371 PPCODE:
3372{
3373 HV *hv = (HV *)av_pop (av_async_pool);
3374 AV *av = newAV ();
3375 SV *cb = ST (0);
3376 int i;
3377
3378 av_extend (av, items - 2);
3379 for (i = 1; i < items; ++i)
3380 av_push (av, SvREFCNT_inc_NN (ST (i)));
3381
3382 if ((SV *)hv == &PL_sv_undef)
3383 {
3384 PUSHMARK (SP);
3385 EXTEND (SP, 2);
3386 PUSHs (sv_Coro);
3387 PUSHs ((SV *)cv_pool_handler);
3388 PUTBACK;
3389 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3390 SPAGAIN;
3391
3392 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3393 }
3394
3395 {
3396 struct coro *coro = SvSTATE_hv (hv);
3397
3398 assert (!coro->invoke_cb);
3399 assert (!coro->invoke_av);
3400 coro->invoke_cb = SvREFCNT_inc (cb);
3401 coro->invoke_av = av;
3402 }
3403
3404 api_ready (aTHX_ (SV *)hv);
3405
3406 if (GIMME_V != G_VOID)
3407 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3408 else
3409 SvREFCNT_dec (hv);
3410}
3411
1176SV * 3412SV *
1177_aio_get_state () 3413rouse_cb ()
3414 PROTOTYPE:
1178 CODE: 3415 CODE:
1179{ 3416 RETVAL = coro_new_rouse_cb (aTHX);
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT: 3417 OUTPUT:
1195 RETVAL 3418 RETVAL
1196 3419
1197void 3420void
1198_aio_set_state (char *data_) 3421rouse_wait (...)
3422 PROTOTYPE: ;$
3423 PPCODE:
3424 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3425
3426void
3427on_enter (SV *block)
3428 ALIAS:
3429 on_leave = 1
1199 PROTOTYPE: $ 3430 PROTOTYPE: &
1200 CODE: 3431 CODE:
1201{ 3432{
1202 struct { 3433 struct coro *coro = SvSTATE_current;
3434 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3435
3436 block = (SV *)coro_sv_2cv (aTHX_ block);
3437
3438 if (!*avp)
3439 *avp = newAV ();
3440
3441 av_push (*avp, SvREFCNT_inc (block));
3442
3443 if (!ix)
3444 on_enterleave_call (aTHX_ block);
3445
3446 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3447 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3448 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = PerlIO::cede
3453
3454BOOT:
3455 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::Semaphore
3459
3460SV *
3461new (SV *klass, SV *count = 0)
3462 CODE:
3463 RETVAL = sv_bless (
3464 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3465 GvSTASH (CvGV (cv))
3466 );
3467 OUTPUT:
3468 RETVAL
3469
3470# helper for Coro::Channel and others
3471SV *
3472_alloc (int count)
3473 CODE:
3474 RETVAL = coro_waitarray_new (aTHX_ count);
3475 OUTPUT:
3476 RETVAL
3477
3478SV *
3479count (SV *self)
3480 CODE:
3481 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3482 OUTPUT:
3483 RETVAL
3484
3485void
3486up (SV *self, int adjust = 1)
3487 ALIAS:
3488 adjust = 1
3489 CODE:
3490 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3491
3492void
3493down (...)
3494 CODE:
3495 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3496
3497void
3498wait (...)
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3501
3502void
3503try (SV *self)
3504 PPCODE:
3505{
3506 AV *av = (AV *)SvRV (self);
3507 SV *count_sv = AvARRAY (av)[0];
3508 IV count = SvIVX (count_sv);
3509
3510 if (count > 0)
3511 {
3512 --count;
3513 SvIVX (count_sv) = count;
3514 XSRETURN_YES;
3515 }
3516 else
3517 XSRETURN_NO;
3518}
3519
3520void
3521waiters (SV *self)
3522 PPCODE:
3523{
3524 AV *av = (AV *)SvRV (self);
3525 int wcount = AvFILLp (av) + 1 - 1;
3526
3527 if (GIMME_V == G_SCALAR)
3528 XPUSHs (sv_2mortal (newSViv (wcount)));
3529 else
3530 {
1203 int errorno; 3531 int i;
1204 int laststype; 3532 EXTEND (SP, wcount);
1205 int laststatval; 3533 for (i = 1; i <= wcount; ++i)
1206 Stat_t statcache; 3534 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1207 } *data = (void *)data_; 3535 }
1208
1209 errno = data->errorno;
1210 PL_laststype = data->laststype;
1211 PL_laststatval = data->laststatval;
1212 PL_statcache = data->statcache;
1213} 3536}
3537
3538MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3539
3540void
3541_may_delete (SV *sem, int count, int extra_refs)
3542 PPCODE:
3543{
3544 AV *av = (AV *)SvRV (sem);
3545
3546 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3547 && AvFILLp (av) == 0 /* no waiters, just count */
3548 && SvIV (AvARRAY (av)[0]) == count)
3549 XSRETURN_YES;
3550
3551 XSRETURN_NO;
3552}
3553
3554MODULE = Coro::State PACKAGE = Coro::Signal
3555
3556SV *
3557new (SV *klass)
3558 CODE:
3559 RETVAL = sv_bless (
3560 coro_waitarray_new (aTHX_ 0),
3561 GvSTASH (CvGV (cv))
3562 );
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567wait (...)
3568 CODE:
3569 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3570
3571void
3572broadcast (SV *self)
3573 CODE:
3574{
3575 AV *av = (AV *)SvRV (self);
3576 coro_signal_wake (aTHX_ av, AvFILLp (av));
3577}
3578
3579void
3580send (SV *self)
3581 CODE:
3582{
3583 AV *av = (AV *)SvRV (self);
3584
3585 if (AvFILLp (av))
3586 coro_signal_wake (aTHX_ av, 1);
3587 else
3588 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3589}
3590
3591IV
3592awaited (SV *self)
3593 CODE:
3594 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3595 OUTPUT:
3596 RETVAL
3597
3598
3599MODULE = Coro::State PACKAGE = Coro::AnyEvent
3600
3601BOOT:
3602 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3603
3604void
3605_schedule (...)
3606 CODE:
3607{
3608 static int incede;
3609
3610 api_cede_notself (aTHX);
3611
3612 ++incede;
3613 while (coro_nready >= incede && api_cede (aTHX))
3614 ;
3615
3616 sv_setsv (sv_activity, &PL_sv_undef);
3617 if (coro_nready >= incede)
3618 {
3619 PUSHMARK (SP);
3620 PUTBACK;
3621 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3622 }
3623
3624 --incede;
3625}
3626
3627
3628MODULE = Coro::State PACKAGE = Coro::AIO
3629
3630void
3631_register (char *target, char *proto, SV *req)
3632 CODE:
3633{
3634 CV *req_cv = coro_sv_2cv (aTHX_ req);
3635 /* newXSproto doesn't return the CV on 5.8 */
3636 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3637 sv_setpv ((SV *)slf_cv, proto);
3638 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3639}
3640

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