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Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.341 by root, Mon Dec 15 15:03:31 2008 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? */
63 165
64/* The next macro should declare a variable stacklevel that contains and approximation 166/* we hijack an hopefully unused CV flag for our purposes */
65 * to the current C stack pointer. Its property is that it changes with each call 167#define CVf_SLF 0x4000
66 * and should be unique. */ 168static OP *pp_slf (pTHX);
67#define dSTACKLEVEL void *stacklevel = &stacklevel
68 169
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 170static U32 cctx_gen;
70 171static size_t cctx_stacksize = CORO_STACKSIZE;
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
85static 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;
86static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
88 177
89/* this is actually not just 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 */
90typedef struct coro_stack { 213typedef struct coro_cctx
214{
91 struct coro_stack *next; 215 struct coro_cctx *next;
92 216
93 void *idle_sp; 217 /* the stack */
94 void *sptr; 218 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
96 220
97 /* cpu state */ 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} coro_stack;
100 226
101static coro_stack *main_stack; 227 U32 gen;
228#if CORO_USE_VALGRIND
229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
102 233
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 */
103struct coro { 262struct coro {
104 /* optionally saved, might be zero */ 263 /* the C coroutine allocated to this perl coroutine, if any */
105 AV *defav; 264 coro_cctx *cctx;
106 SV *defsv;
107 SV *errsv;
108
109 /* saved global state not related to stacks */
110 U8 dowarn;
111 I32 in_eval;
112 265
113 /* the c stack, if any */ 266 /* state data */
114 coro_stack *stack; 267 struct CoroSLF slf_frame; /* saved slf frame */
115
116 /* the stacks and related info (callchain etc..) */
117 PERL_SI *curstackinfo;
118 AV *curstack;
119 AV *mainstack; 268 AV *mainstack;
120 SV **stack_sp; 269 perl_slots *slot; /* basically the saved sp */
121 OP *op; 270
122 SV **curpad; 271 CV *startcv; /* the CV to execute */
123 AV *comppad; 272 AV *args; /* data associated with this coroutine (initial args) */
124 CV *compcv; 273 int refcnt; /* coroutines are refcounted, yes */
125 SV **stack_base; 274 int flags; /* CF_ flags */
126 SV **stack_max; 275 HV *hv; /* the perl hash associated with this coro, if any */
127 SV **tmps_stack; 276 void (*on_destroy)(pTHX_ struct coro *coro);
128 I32 tmps_floor; 277
129 I32 tmps_ix; 278 /* statistics */
130 I32 tmps_max; 279 int usecount; /* number of transfers to this coro */
131 I32 *markstack;
132 I32 *markstack_ptr;
133 I32 *markstack_max;
134 I32 *scopestack;
135 I32 scopestack_ix;
136 I32 scopestack_max;
137 ANY *savestack;
138 I32 savestack_ix;
139 I32 savestack_max;
140 OP **retstack;
141 I32 retstack_ix;
142 I32 retstack_max;
143 PMOP *curpm;
144 COP *curcop;
145 JMPENV *top_env;
146 280
147 /* coro process data */ 281 /* coro process data */
148 int prio; 282 int prio;
283 SV *except; /* exception to be thrown */
284 SV *rouse_cb;
149 285
150 /* data associated with this coroutine (initial args) */ 286 /* async_pool */
151 AV *args; 287 SV *saved_deffh;
152 int refcnt; 288 SV *invoke_cb;
289 AV *invoke_av;
290
291 /* on_enter/on_leave */
292 AV *on_enter;
293 AV *on_leave;
294
295 /* linked list */
296 struct coro *next, *prev;
153}; 297};
154 298
155typedef struct coro *Coro__State; 299typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 300typedef struct coro *Coro__State_or_hashref;
157 301
158static AV * 302/* the following variables are effectively part of the perl context */
159coro_clone_padlist (pTHX_ CV *cv) 303/* and get copied between struct coro and these variables */
160{ 304/* the mainr easonw e don't support windows process emulation */
161 AV *padlist = CvPADLIST (cv); 305static struct CoroSLF slf_frame; /* the current slf frame */
162 AV *newpadlist, *newpad;
163
164 newpadlist = newAV ();
165 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist);
173
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad);
176
177 return newpadlist;
178}
179
180static void
181free_padlist (pTHX_ AV *padlist)
182{
183 /* may be during global destruction */
184 if (SvREFCNT (padlist))
185 {
186 I32 i = AvFILLp (padlist);
187 while (i >= 0)
188 {
189 SV **svp = av_fetch (padlist, i--, FALSE);
190 if (svp)
191 {
192 SV *sv;
193 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
194 SvREFCNT_dec (sv);
195
196 SvREFCNT_dec (*svp);
197 }
198 }
199
200 SvREFCNT_dec ((SV*)padlist);
201 }
202}
203
204static int
205coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
206{
207 AV *padlist;
208 AV *av = (AV *)mg->mg_obj;
209
210 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist);
213
214 SvREFCNT_dec (av);
215
216 return 0;
217}
218
219#define PERL_MAGIC_coro PERL_MAGIC_ext
220
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222
223/* the next two functions merely cache the padlists */
224static void
225get_padlist (pTHX_ CV *cv)
226{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
228
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
231 else
232 {
233#if 0
234 /* this should work - but it doesn't :( */
235 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp);
239#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
241#endif
242 }
243}
244
245static void
246put_padlist (pTHX_ CV *cv)
247{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
249
250 if (!mg)
251 {
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
259}
260
261#define SB do {
262#define SE } while (0)
263
264#define LOAD(state) load_state(aTHX_ (state));
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
268
269static void
270load_state(pTHX_ Coro__State c)
271{
272 PL_dowarn = c->dowarn;
273 PL_in_eval = c->in_eval;
274
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 PL_top_env = c->top_env;
306
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
310
311 {
312 dSP;
313 CV *cv;
314
315 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs))
317 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist;
324 }
325
326 ++CvDEPTH(cv);
327 }
328
329 PUTBACK;
330 }
331}
332
333static void
334save_state(pTHX_ Coro__State c, int flags)
335{
336 {
337 dSP;
338 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack;
340 PERL_SI *top_si = PL_curstackinfo;
341
342 /*
343 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :(
345 */
346
347 PUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */
349 for (;;)
350 {
351 while (cxix >= 0)
352 {
353 PERL_CONTEXT *cx = &ccstk[cxix--];
354
355 if (CxTYPE(cx) == CXt_SUB)
356 {
357 CV *cv = cx->blk_sub.cv;
358 if (CvDEPTH(cv))
359 {
360 EXTEND (SP, CvDEPTH(cv)*2);
361
362 while (--CvDEPTH(cv))
363 {
364 /* this tells the restore code to increment CvDEPTH */
365 PUSHs (Nullsv);
366 PUSHs ((SV *)cv);
367 }
368
369 PUSHs ((SV *)CvPADLIST(cv));
370 PUSHs ((SV *)cv);
371
372 get_padlist (aTHX_ cv);
373 }
374 }
375#ifdef CXt_FORMAT
376 else if (CxTYPE(cx) == CXt_FORMAT)
377 {
378 /* I never used formats, so how should I know how these are implemented? */
379 /* my bold guess is as a simple, plain sub... */
380 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381 }
382#endif
383 }
384
385 if (top_si->si_type == PERLSI_MAIN)
386 break;
387
388 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix;
391 }
392
393 PUTBACK;
394 }
395
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
399
400 c->dowarn = PL_dowarn;
401 c->in_eval = PL_in_eval;
402
403 c->curstackinfo = PL_curstackinfo;
404 c->curstack = PL_curstack;
405 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp;
407 c->op = PL_op;
408 c->curpad = PL_curpad;
409 c->comppad = PL_comppad;
410 c->compcv = PL_compcv;
411 c->stack_base = PL_stack_base;
412 c->stack_max = PL_stack_max;
413 c->tmps_stack = PL_tmps_stack;
414 c->tmps_floor = PL_tmps_floor;
415 c->tmps_ix = PL_tmps_ix;
416 c->tmps_max = PL_tmps_max;
417 c->markstack = PL_markstack;
418 c->markstack_ptr = PL_markstack_ptr;
419 c->markstack_max = PL_markstack_max;
420 c->scopestack = PL_scopestack;
421 c->scopestack_ix = PL_scopestack_ix;
422 c->scopestack_max = PL_scopestack_max;
423 c->savestack = PL_savestack;
424 c->savestack_ix = PL_savestack_ix;
425 c->savestack_max = PL_savestack_max;
426#if PERL_VERSION < 9
427 c->retstack = PL_retstack;
428 c->retstack_ix = PL_retstack_ix;
429 c->retstack_max = PL_retstack_max;
430#endif
431 c->curpm = PL_curpm;
432 c->curcop = PL_curcop;
433 c->top_env = PL_top_env;
434}
435
436/*
437 * allocate various perl stacks. This is an exact copy
438 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace.
441 */
442static void
443coro_init_stacks (pTHX)
444{
445 LOCK;
446
447 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451
452 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455
456 New(50,PL_tmps_stack,96,SV*);
457 PL_tmps_floor = -1;
458 PL_tmps_ix = -1;
459 PL_tmps_max = 96;
460
461 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16;
464
465#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET;
467#endif
468
469 New(54,PL_scopestack,16,I32);
470 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16;
472
473 New(54,PL_savestack,96,ANY);
474 PL_savestack_ix = 0;
475 PL_savestack_max = 96;
476
477#if PERL_VERSION < 9
478 New(54,PL_retstack,8,OP*);
479 PL_retstack_ix = 0;
480 PL_retstack_max = 8;
481#endif
482
483 UNLOCK;
484}
485
486/*
487 * destroy the stacks, the callchain etc...
488 */
489static void
490destroy_stacks(pTHX)
491{
492 if (!IN_DESTRUCT)
493 {
494 /* is this ugly, I ask? */
495 LEAVE_SCOPE (0);
496
497 /* sure it is, but more important: is it correct?? :/ */
498 FREETMPS;
499
500 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501 }
502
503 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next;
505
506 while (PL_curstackinfo)
507 {
508 PERL_SI *p = PL_curstackinfo->si_prev;
509
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521
522 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p;
525 }
526
527 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack);
529 Safefree (PL_scopestack);
530 Safefree (PL_savestack);
531#if PERL_VERSION < 9
532 Safefree (PL_retstack);
533#endif
534}
535
536static void
537setup_coro (struct coro *coro)
538{
539 /*
540 * emulate part of the perl startup here.
541 */
542 dTHX;
543 dSP;
544 UNOP myop;
545 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546
547 coro_init_stacks (aTHX);
548 /*PL_curcop = 0;*/
549 /*PL_in_eval = PL_in_eval;*/ /* inherit */
550 SvREFCNT_dec (GvAV (PL_defgv));
551 GvAV (PL_defgv) = coro->args; coro->args = 0;
552
553 SPAGAIN;
554
555 Zero (&myop, 1, UNOP);
556 myop.op_next = Nullop;
557 myop.op_flags = OPf_WANT_VOID;
558
559 PL_op = (OP *)&myop;
560
561 PUSHMARK(SP);
562 XPUSHs (sub_init);
563 PUTBACK;
564 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565 SPAGAIN;
566
567 ENTER; /* necessary e.g. for dounwind */
568}
569
570static void
571transfer_tail ()
572{
573 if (coro_mortal)
574 {
575 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0;
577 }
578
579 UNLOCK;
580}
581
582static void
583coro_run (void *arg)
584{
585 /*
586 * this is a _very_ stripped down perl interpreter ;)
587 */
588 dTHX;
589
590 transfer_tail ();
591
592 PL_top_env = &PL_start_env;
593 PL_restartop = PL_op->op_next;
594 /* somebody will hit me for both perl_run and PL_restart_top */
595 perl_run (aTHX_ PERL_GET_CONTEXT);
596
597 abort ();
598}
599
600static coro_stack *
601stack_new ()
602{
603 coro_stack *stack;
604
605 New (0, stack, 1, coro_stack);
606
607#if HAVE_MMAP
608
609 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
610 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611
612 if (stack->sptr == (void *)-1)
613 {
614 fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");
615 _exit (EXIT_FAILURE);
616 }
617
618 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
619
620#else
621
622 stack->ssize = STACKSIZE * (long)sizeof (long);
623 New (0, stack->sptr, STACKSIZE, long);
624
625 if (!stack->sptr)
626 {
627 fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628 _exit (EXIT_FAILURE);
629 }
630
631#endif
632
633 coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635 return stack;
636}
637
638static void
639stack_free (coro_stack *stack)
640{
641 if (!stack || stack == main_stack)
642 return;
643
644#if HAVE_MMAP
645 munmap (stack->sptr, stack->ssize);
646#else
647 Safefree (stack->sptr);
648#endif
649
650 Safefree (stack);
651}
652
653static coro_stack *stack_first;
654
655static void
656stack_get (struct coro *coro)
657{
658 if (stack_first)
659 {
660 coro->stack = stack_first;
661 stack_first = stack_first->next;
662 }
663 else
664 coro->stack = stack_new ();
665}
666
667static void
668stack_put (coro_stack *stack)
669{
670 stack->next = stack_first;
671 stack_first = stack;
672}
673
674/* never call directly, always through the coro_state_transfer global variable */
675static void
676transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
677{
678 dSTACKLEVEL;
679
680 /* sometimes transfer is only called to set idle_sp */
681 if (!prev->stack->idle_sp)
682 prev->stack->idle_sp = stacklevel;
683
684 LOCK;
685
686 if (prev != next)
687 {
688 coro_stack *prev_stack = prev->stack;
689
690 /* possibly "free" the stack */
691 if (prev_stack->idle_sp == stacklevel)
692 {
693 stack_put (prev_stack);
694 prev->stack = 0;
695 }
696
697 if (next->mainstack)
698 {
699 /* coroutine already started */
700 SAVE (prev, flags);
701 LOAD (next);
702 }
703 else
704 {
705 /* need to start coroutine */
706 /* first get rid of the old state */
707 SAVE (prev, -1);
708 /* setup coroutine call */
709 setup_coro (next);
710 /* need to change stack from main_stack to real one */
711 next->stack = 0;
712 }
713
714 if (!next->stack)
715 stack_get (next);
716
717 if (prev_stack != next->stack)
718 coro_transfer (&prev_stack->cctx, &next->stack->cctx);
719 }
720
721 transfer_tail ();
722}
723
724/* use this function pointer to call the above function */
725/* this is done to increase chances of the compiler not inlining the call */
726void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
727
728static void
729coro_state_destroy (struct coro *coro)
730{
731 if (coro->refcnt--)
732 return;
733
734 if (coro->mainstack && coro->mainstack != main_mainstack)
735 {
736 struct coro temp;
737
738 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
739 LOAD (aTHX_ coro);
740
741 destroy_stacks (aTHX);
742
743 LOAD ((&temp)); /* this will get rid of defsv etc.. */
744
745 coro->mainstack = 0;
746 }
747
748 stack_free (coro->stack);
749 SvREFCNT_dec (coro->args);
750 Safefree (coro);
751}
752
753static int
754coro_state_clear (SV *sv, MAGIC *mg)
755{
756 struct coro *coro = (struct coro *)mg->mg_ptr;
757 mg->mg_ptr = 0;
758
759 coro_state_destroy (coro);
760
761 return 0;
762}
763
764static int
765coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
766{
767 struct coro *coro = (struct coro *)mg->mg_ptr;
768
769 ++coro->refcnt;
770
771 return 0;
772}
773
774static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
775
776static struct coro *
777SvSTATE (SV *coro)
778{
779 HV *stash;
780 MAGIC *mg;
781
782 if (SvROK (coro))
783 coro = SvRV (coro);
784
785 stash = SvSTASH (coro);
786 if (stash != coro_stash && stash != coro_state_stash)
787 {
788 /* very slow, but rare, check */
789 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
790 croak ("Coro::State object required");
791 }
792
793 mg = SvMAGIC (coro);
794 assert (mg->mg_type == PERL_MAGIC_ext);
795 return (struct coro *)mg->mg_ptr;
796}
797
798static void
799api_transfer (pTHX_ SV *prev, SV *next, int flags)
800{
801 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
802}
803 306
804/** Coro ********************************************************************/ 307/** Coro ********************************************************************/
805 308
806#define PRIO_MAX 3 309#define PRIO_MAX 3
807#define PRIO_HIGH 1 310#define PRIO_HIGH 1
… …
809#define PRIO_LOW -1 312#define PRIO_LOW -1
810#define PRIO_IDLE -3 313#define PRIO_IDLE -3
811#define PRIO_MIN -4 314#define PRIO_MIN -4
812 315
813/* for Coro.pm */ 316/* for Coro.pm */
814static GV *coro_current, *coro_idle; 317static SV *coro_current;
318static SV *coro_readyhook;
815static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 319static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
816static int coro_nready; 320static CV *cv_coro_run, *cv_coro_terminate;
321static struct coro *coro_first;
322#define coro_nready coroapi.nready
817 323
818static void 324/** lowlevel stuff **********************************************************/
819coro_enq (pTHX_ SV *sv)
820{
821 int prio;
822
823 if (SvTYPE (sv) != SVt_PVHV)
824 croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826 prio = SvSTATE (sv)->prio;
827
828 av_push (coro_ready [prio - PRIO_MIN], sv);
829 coro_nready++;
830}
831 325
832static SV * 326static SV *
833coro_deq (pTHX_ int min_prio) 327coro_get_sv (pTHX_ const char *name, int create)
834{ 328{
835 int prio = PRIO_MAX - PRIO_MIN; 329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_sv (name, create);
332#endif
333 return get_sv (name, create);
334}
836 335
837 min_prio -= PRIO_MIN; 336static AV *
838 if (min_prio < 0) 337coro_get_av (pTHX_ const char *name, int create)
839 min_prio = 0; 338{
339#if PERL_VERSION_ATLEAST (5,10,0)
340 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
341 get_av (name, create);
342#endif
343 return get_av (name, create);
344}
840 345
841 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 346static HV *
842 if (AvFILLp (coro_ready [prio]) >= 0) 347coro_get_hv (pTHX_ const char *name, int create)
843 { 348{
844 coro_nready--; 349#if PERL_VERSION_ATLEAST (5,10,0)
845 return av_shift (coro_ready [prio]); 350 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
846 } 351 get_hv (name, create);
352#endif
353 return get_hv (name, create);
354}
847 355
356/* may croak */
357INLINE CV *
358coro_sv_2cv (pTHX_ SV *sv)
359{
360 HV *st;
361 GV *gvp;
362 CV *cv = sv_2cv (sv, &st, &gvp, 0);
363
364 if (!cv)
365 croak ("code reference expected");
366
848 return 0; 367 return cv;
849} 368}
850 369
851static void 370/*****************************************************************************/
852api_ready (SV *coro) 371/* magic glue */
372
373#define CORO_MAGIC_type_cv 26
374#define CORO_MAGIC_type_state PERL_MAGIC_ext
375
376#define CORO_MAGIC_NN(sv, type) \
377 (expect_true (SvMAGIC (sv)->mg_type == type) \
378 ? SvMAGIC (sv) \
379 : mg_find (sv, type))
380
381#define CORO_MAGIC(sv, type) \
382 (expect_true (SvMAGIC (sv)) \
383 ? CORO_MAGIC_NN (sv, type) \
384 : 0)
385
386#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
388
389INLINE struct coro *
390SvSTATE_ (pTHX_ SV *coro)
853{ 391{
854 dTHX; 392 HV *stash;
393 MAGIC *mg;
855 394
856 if (SvROK (coro)) 395 if (SvROK (coro))
857 coro = SvRV (coro); 396 coro = SvRV (coro);
858 397
859 LOCK; 398 if (expect_false (SvTYPE (coro) != SVt_PVHV))
860 coro_enq (aTHX_ SvREFCNT_inc (coro)); 399 croak ("Coro::State object required");
861 UNLOCK;
862}
863 400
401 stash = SvSTASH (coro);
402 if (expect_false (stash != coro_stash && stash != coro_state_stash))
403 {
404 /* very slow, but rare, check */
405 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
406 croak ("Coro::State object required");
407 }
408
409 mg = CORO_MAGIC_state (coro);
410 return (struct coro *)mg->mg_ptr;
411}
412
413#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
414
415/* faster than SvSTATE, but expects a coroutine hv */
416#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
417#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
418
419/*****************************************************************************/
420/* padlist management and caching */
421
422static AV *
423coro_derive_padlist (pTHX_ CV *cv)
424{
425 AV *padlist = CvPADLIST (cv);
426 AV *newpadlist, *newpad;
427
428 newpadlist = newAV ();
429 AvREAL_off (newpadlist);
430#if PERL_VERSION_ATLEAST (5,10,0)
431 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
432#else
433 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
434#endif
435 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
436 --AvFILLp (padlist);
437
438 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
439 av_store (newpadlist, 1, (SV *)newpad);
440
441 return newpadlist;
442}
443
444static void
445free_padlist (pTHX_ AV *padlist)
446{
447 /* may be during global destruction */
448 if (!IN_DESTRUCT)
449 {
450 I32 i = AvFILLp (padlist);
451
452 while (i > 0) /* special-case index 0 */
453 {
454 /* we try to be extra-careful here */
455 AV *av = (AV *)AvARRAY (padlist)[i--];
456 I32 j = AvFILLp (av);
457
458 while (j >= 0)
459 SvREFCNT_dec (AvARRAY (av)[j--]);
460
461 AvFILLp (av) = -1;
462 SvREFCNT_dec (av);
463 }
464
465 SvREFCNT_dec (AvARRAY (padlist)[0]);
466
467 AvFILLp (padlist) = -1;
468 SvREFCNT_dec ((SV*)padlist);
469 }
470}
471
864static void 472static int
865api_schedule (void) 473coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
866{ 474{
475 AV *padlist;
476 AV *av = (AV *)mg->mg_obj;
477
478 /* casting is fun. */
479 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
480 free_padlist (aTHX_ padlist);
481
482 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
483
484 return 0;
485}
486
487static MGVTBL coro_cv_vtbl = {
488 0, 0, 0, 0,
489 coro_cv_free
490};
491
492/* the next two functions merely cache the padlists */
493static void
494get_padlist (pTHX_ CV *cv)
495{
496 MAGIC *mg = CORO_MAGIC_cv (cv);
497 AV *av;
498
499 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
500 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
501 else
502 {
503#if CORO_PREFER_PERL_FUNCTIONS
504 /* this is probably cleaner? but also slower! */
505 /* in practise, it seems to be less stable */
506 CV *cp = Perl_cv_clone (aTHX_ cv);
507 CvPADLIST (cv) = CvPADLIST (cp);
508 CvPADLIST (cp) = 0;
509 SvREFCNT_dec (cp);
510#else
511 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
512#endif
513 }
514}
515
516static void
517put_padlist (pTHX_ CV *cv)
518{
519 MAGIC *mg = CORO_MAGIC_cv (cv);
520 AV *av;
521
522 if (expect_false (!mg))
523 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
524
525 av = (AV *)mg->mg_obj;
526
527 if (expect_false (AvFILLp (av) >= AvMAX (av)))
528 av_extend (av, AvFILLp (av) + 1);
529
530 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
531}
532
533/** load & save, init *******************************************************/
534
535static void
536on_enterleave_call (pTHX_ SV *cb);
537
538static void
539load_perl (pTHX_ Coro__State c)
540{
541 perl_slots *slot = c->slot;
542 c->slot = 0;
543
544 PL_mainstack = c->mainstack;
545
546 GvSV (PL_defgv) = slot->defsv;
547 GvAV (PL_defgv) = slot->defav;
548 GvSV (PL_errgv) = slot->errsv;
549 GvSV (irsgv) = slot->irsgv;
550 GvHV (PL_hintgv) = slot->hinthv;
551
552 #define VAR(name,type) PL_ ## name = slot->name;
553 # include "state.h"
554 #undef VAR
555
556 {
557 dSP;
558
559 CV *cv;
560
561 /* now do the ugly restore mess */
562 while (expect_true (cv = (CV *)POPs))
563 {
564 put_padlist (aTHX_ cv); /* mark this padlist as available */
565 CvDEPTH (cv) = PTR2IV (POPs);
566 CvPADLIST (cv) = (AV *)POPs;
567 }
568
569 PUTBACK;
570 }
571
572 slf_frame = c->slf_frame;
573 CORO_THROW = c->except;
574
575 if (expect_false (c->on_enter))
576 {
577 int i;
578
579 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
580 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
581 }
582}
583
584static void
585save_perl (pTHX_ Coro__State c)
586{
587 if (expect_false (c->on_leave))
588 {
589 int i;
590
591 for (i = AvFILLp (c->on_leave); i >= 0; --i)
592 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
593 }
594
595 c->except = CORO_THROW;
596 c->slf_frame = slf_frame;
597
598 {
599 dSP;
600 I32 cxix = cxstack_ix;
601 PERL_CONTEXT *ccstk = cxstack;
602 PERL_SI *top_si = PL_curstackinfo;
603
604 /*
605 * the worst thing you can imagine happens first - we have to save
606 * (and reinitialize) all cv's in the whole callchain :(
607 */
608
609 XPUSHs (Nullsv);
610 /* this loop was inspired by pp_caller */
611 for (;;)
612 {
613 while (expect_true (cxix >= 0))
614 {
615 PERL_CONTEXT *cx = &ccstk[cxix--];
616
617 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
618 {
619 CV *cv = cx->blk_sub.cv;
620
621 if (expect_true (CvDEPTH (cv)))
622 {
623 EXTEND (SP, 3);
624 PUSHs ((SV *)CvPADLIST (cv));
625 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
626 PUSHs ((SV *)cv);
627
628 CvDEPTH (cv) = 0;
629 get_padlist (aTHX_ cv);
630 }
631 }
632 }
633
634 if (expect_true (top_si->si_type == PERLSI_MAIN))
635 break;
636
637 top_si = top_si->si_prev;
638 ccstk = top_si->si_cxstack;
639 cxix = top_si->si_cxix;
640 }
641
642 PUTBACK;
643 }
644
645 /* allocate some space on the context stack for our purposes */
646 /* we manually unroll here, as usually 2 slots is enough */
647 if (SLOT_COUNT >= 1) CXINC;
648 if (SLOT_COUNT >= 2) CXINC;
649 if (SLOT_COUNT >= 3) CXINC;
650 {
651 int i;
652 for (i = 3; i < SLOT_COUNT; ++i)
653 CXINC;
654 }
655 cxstack_ix -= SLOT_COUNT; /* undo allocation */
656
657 c->mainstack = PL_mainstack;
658
659 {
660 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
661
662 slot->defav = GvAV (PL_defgv);
663 slot->defsv = DEFSV;
664 slot->errsv = ERRSV;
665 slot->irsgv = GvSV (irsgv);
666 slot->hinthv = GvHV (PL_hintgv);
667
668 #define VAR(name,type) slot->name = PL_ ## name;
669 # include "state.h"
670 #undef VAR
671 }
672}
673
674/*
675 * allocate various perl stacks. This is almost an exact copy
676 * of perl.c:init_stacks, except that it uses less memory
677 * on the (sometimes correct) assumption that coroutines do
678 * not usually need a lot of stackspace.
679 */
680#if CORO_PREFER_PERL_FUNCTIONS
681# define coro_init_stacks(thx) init_stacks ()
682#else
683static void
684coro_init_stacks (pTHX)
685{
686 PL_curstackinfo = new_stackinfo(32, 8);
687 PL_curstackinfo->si_type = PERLSI_MAIN;
688 PL_curstack = PL_curstackinfo->si_stack;
689 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
690
691 PL_stack_base = AvARRAY(PL_curstack);
692 PL_stack_sp = PL_stack_base;
693 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
694
695 New(50,PL_tmps_stack,32,SV*);
696 PL_tmps_floor = -1;
697 PL_tmps_ix = -1;
698 PL_tmps_max = 32;
699
700 New(54,PL_markstack,16,I32);
701 PL_markstack_ptr = PL_markstack;
702 PL_markstack_max = PL_markstack + 16;
703
704#ifdef SET_MARK_OFFSET
705 SET_MARK_OFFSET;
706#endif
707
708 New(54,PL_scopestack,8,I32);
709 PL_scopestack_ix = 0;
710 PL_scopestack_max = 8;
711
712 New(54,PL_savestack,24,ANY);
713 PL_savestack_ix = 0;
714 PL_savestack_max = 24;
715
716#if !PERL_VERSION_ATLEAST (5,10,0)
717 New(54,PL_retstack,4,OP*);
718 PL_retstack_ix = 0;
719 PL_retstack_max = 4;
720#endif
721}
722#endif
723
724/*
725 * destroy the stacks, the callchain etc...
726 */
727static void
728coro_destruct_stacks (pTHX)
729{
730 while (PL_curstackinfo->si_next)
731 PL_curstackinfo = PL_curstackinfo->si_next;
732
733 while (PL_curstackinfo)
734 {
735 PERL_SI *p = PL_curstackinfo->si_prev;
736
737 if (!IN_DESTRUCT)
738 SvREFCNT_dec (PL_curstackinfo->si_stack);
739
740 Safefree (PL_curstackinfo->si_cxstack);
741 Safefree (PL_curstackinfo);
742 PL_curstackinfo = p;
743 }
744
745 Safefree (PL_tmps_stack);
746 Safefree (PL_markstack);
747 Safefree (PL_scopestack);
748 Safefree (PL_savestack);
749#if !PERL_VERSION_ATLEAST (5,10,0)
750 Safefree (PL_retstack);
751#endif
752}
753
754#define CORO_RSS \
755 rss += sizeof (SYM (curstackinfo)); \
756 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
757 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
758 rss += SYM (tmps_max) * sizeof (SV *); \
759 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
760 rss += SYM (scopestack_max) * sizeof (I32); \
761 rss += SYM (savestack_max) * sizeof (ANY);
762
763static size_t
764coro_rss (pTHX_ struct coro *coro)
765{
766 size_t rss = sizeof (*coro);
767
768 if (coro->mainstack)
769 {
770 if (coro->flags & CF_RUNNING)
771 {
772 #define SYM(sym) PL_ ## sym
773 CORO_RSS;
774 #undef SYM
775 }
776 else
777 {
778 #define SYM(sym) coro->slot->sym
779 CORO_RSS;
780 #undef SYM
781 }
782 }
783
784 return rss;
785}
786
787/** coroutine stack handling ************************************************/
788
789static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
790static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
791static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
792
793/* apparently < 5.8.8 */
794#ifndef MgPV_nolen_const
795#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
796 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
797 (const char*)(mg)->mg_ptr)
798#endif
799
800/*
801 * This overrides the default magic get method of %SIG elements.
802 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
803 * and instead of trying to save and restore the hash elements, we just provide
804 * readback here.
805 */
806static int
807coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
808{
809 const char *s = MgPV_nolen_const (mg);
810
811 if (*s == '_')
812 {
813 SV **svp = 0;
814
815 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
816 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
817
818 if (svp)
819 {
820 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
821 return 0;
822 }
823 }
824
825 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
826}
827
828static int
829coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
830{
831 const char *s = MgPV_nolen_const (mg);
832
833 if (*s == '_')
834 {
835 SV **svp = 0;
836
837 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
838 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
839
840 if (svp)
841 {
842 SV *old = *svp;
843 *svp = 0;
844 SvREFCNT_dec (old);
845 return 0;
846 }
847 }
848
849 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
850}
851
852static int
853coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
854{
855 const char *s = MgPV_nolen_const (mg);
856
857 if (*s == '_')
858 {
859 SV **svp = 0;
860
861 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
862 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
863
864 if (svp)
865 {
866 SV *old = *svp;
867 *svp = SvOK (sv) ? newSVsv (sv) : 0;
868 SvREFCNT_dec (old);
869 return 0;
870 }
871 }
872
873 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
874}
875
876static void
877prepare_nop (pTHX_ struct coro_transfer_args *ta)
878{
879 /* kind of mega-hacky, but works */
880 ta->next = ta->prev = (struct coro *)ta;
881}
882
883static int
884slf_check_nop (pTHX_ struct CoroSLF *frame)
885{
886 return 0;
887}
888
889static int
890slf_check_repeat (pTHX_ struct CoroSLF *frame)
891{
892 return 1;
893}
894
895static UNOP coro_setup_op;
896
897static void NOINLINE /* noinline to keep it out of the transfer fast path */
898coro_setup (pTHX_ struct coro *coro)
899{
900 /*
901 * emulate part of the perl startup here.
902 */
903 coro_init_stacks (aTHX);
904
905 PL_runops = RUNOPS_DEFAULT;
906 PL_curcop = &PL_compiling;
907 PL_in_eval = EVAL_NULL;
908 PL_comppad = 0;
909 PL_comppad_name = 0;
910 PL_comppad_name_fill = 0;
911 PL_comppad_name_floor = 0;
912 PL_curpm = 0;
913 PL_curpad = 0;
914 PL_localizing = 0;
915 PL_dirty = 0;
916 PL_restartop = 0;
917#if PERL_VERSION_ATLEAST (5,10,0)
918 PL_parser = 0;
919#endif
920 PL_hints = 0;
921
922 /* recreate the die/warn hooks */
923 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
924 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
925
926 GvSV (PL_defgv) = newSV (0);
927 GvAV (PL_defgv) = coro->args; coro->args = 0;
928 GvSV (PL_errgv) = newSV (0);
929 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
930 GvHV (PL_hintgv) = 0;
931 PL_rs = newSVsv (GvSV (irsgv));
932 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
933
934 {
935 dSP;
936 UNOP myop;
937
938 Zero (&myop, 1, UNOP);
939 myop.op_next = Nullop;
940 myop.op_type = OP_ENTERSUB;
941 myop.op_flags = OPf_WANT_VOID;
942
943 PUSHMARK (SP);
944 PUSHs ((SV *)coro->startcv);
945 PUTBACK;
946 PL_op = (OP *)&myop;
947 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
948 }
949
950 /* this newly created coroutine might be run on an existing cctx which most
951 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
952 */
953 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
954 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
955
956 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
957 coro_setup_op.op_next = PL_op;
958 coro_setup_op.op_type = OP_ENTERSUB;
959 coro_setup_op.op_ppaddr = pp_slf;
960 /* no flags etc. required, as an init function won't be called */
961
962 PL_op = (OP *)&coro_setup_op;
963
964 /* copy throw, in case it was set before coro_setup */
965 CORO_THROW = coro->except;
966}
967
968static void
969coro_unwind_stacks (pTHX)
970{
971 if (!IN_DESTRUCT)
972 {
973 /* restore all saved variables and stuff */
974 LEAVE_SCOPE (0);
975 assert (PL_tmps_floor == -1);
976
977 /* free all temporaries */
978 FREETMPS;
979 assert (PL_tmps_ix == -1);
980
981 /* unwind all extra stacks */
982 POPSTACK_TO (PL_mainstack);
983
984 /* unwind main stack */
985 dounwind (-1);
986 }
987}
988
989static void
990coro_destruct_perl (pTHX_ struct coro *coro)
991{
992 coro_unwind_stacks (aTHX);
993
994 SvREFCNT_dec (GvSV (PL_defgv));
995 SvREFCNT_dec (GvAV (PL_defgv));
996 SvREFCNT_dec (GvSV (PL_errgv));
997 SvREFCNT_dec (PL_defoutgv);
998 SvREFCNT_dec (PL_rs);
999 SvREFCNT_dec (GvSV (irsgv));
1000 SvREFCNT_dec (GvHV (PL_hintgv));
1001
1002 SvREFCNT_dec (PL_diehook);
1003 SvREFCNT_dec (PL_warnhook);
1004
1005 SvREFCNT_dec (coro->saved_deffh);
1006 SvREFCNT_dec (coro->rouse_cb);
1007 SvREFCNT_dec (coro->invoke_cb);
1008 SvREFCNT_dec (coro->invoke_av);
1009
1010 coro_destruct_stacks (aTHX);
1011}
1012
1013INLINE void
1014free_coro_mortal (pTHX)
1015{
1016 if (expect_true (coro_mortal))
1017 {
1018 SvREFCNT_dec (coro_mortal);
1019 coro_mortal = 0;
1020 }
1021}
1022
1023static int
1024runops_trace (pTHX)
1025{
1026 COP *oldcop = 0;
1027 int oldcxix = -2;
1028
1029 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1030 {
1031 PERL_ASYNC_CHECK ();
1032
1033 if (cctx_current->flags & CC_TRACE_ALL)
1034 {
1035 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1036 {
1037 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1038 SV **bot, **top;
1039 AV *av = newAV (); /* return values */
1040 SV **cb;
1041 dSP;
1042
1043 GV *gv = CvGV (cx->blk_sub.cv);
1044 SV *fullname = sv_2mortal (newSV (0));
1045 if (isGV (gv))
1046 gv_efullname3 (fullname, gv, 0);
1047
1048 bot = PL_stack_base + cx->blk_oldsp + 1;
1049 top = cx->blk_gimme == G_ARRAY ? SP + 1
1050 : cx->blk_gimme == G_SCALAR ? bot + 1
1051 : bot;
1052
1053 av_extend (av, top - bot);
1054 while (bot < top)
1055 av_push (av, SvREFCNT_inc_NN (*bot++));
1056
1057 PL_runops = RUNOPS_DEFAULT;
1058 ENTER;
1059 SAVETMPS;
1060 EXTEND (SP, 3);
1061 PUSHMARK (SP);
1062 PUSHs (&PL_sv_no);
1063 PUSHs (fullname);
1064 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1065 PUTBACK;
1066 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1067 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1068 SPAGAIN;
1069 FREETMPS;
1070 LEAVE;
1071 PL_runops = runops_trace;
1072 }
1073
1074 if (oldcop != PL_curcop)
1075 {
1076 oldcop = PL_curcop;
1077
1078 if (PL_curcop != &PL_compiling)
1079 {
1080 SV **cb;
1081
1082 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1083 {
1084 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1085
1086 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1087 {
1088 dSP;
1089 GV *gv = CvGV (cx->blk_sub.cv);
1090 SV *fullname = sv_2mortal (newSV (0));
1091
1092 if (isGV (gv))
1093 gv_efullname3 (fullname, gv, 0);
1094
1095 PL_runops = RUNOPS_DEFAULT;
1096 ENTER;
1097 SAVETMPS;
1098 EXTEND (SP, 3);
1099 PUSHMARK (SP);
1100 PUSHs (&PL_sv_yes);
1101 PUSHs (fullname);
1102 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1103 PUTBACK;
1104 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1105 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1106 SPAGAIN;
1107 FREETMPS;
1108 LEAVE;
1109 PL_runops = runops_trace;
1110 }
1111
1112 oldcxix = cxstack_ix;
1113 }
1114
1115 if (cctx_current->flags & CC_TRACE_LINE)
1116 {
1117 dSP;
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 ENTER;
1121 SAVETMPS;
1122 EXTEND (SP, 3);
1123 PL_runops = RUNOPS_DEFAULT;
1124 PUSHMARK (SP);
1125 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1126 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1127 PUTBACK;
1128 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1129 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1130 SPAGAIN;
1131 FREETMPS;
1132 LEAVE;
1133 PL_runops = runops_trace;
1134 }
1135 }
1136 }
1137 }
1138 }
1139
1140 TAINT_NOT;
1141 return 0;
1142}
1143
1144static struct CoroSLF cctx_ssl_frame;
1145
1146static void
1147slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1148{
1149 ta->prev = 0;
1150}
1151
1152static int
1153slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1154{
1155 *frame = cctx_ssl_frame;
1156
1157 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1158}
1159
1160/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1161static void NOINLINE
1162cctx_prepare (pTHX)
1163{
1164 PL_top_env = &PL_start_env;
1165
1166 if (cctx_current->flags & CC_TRACE)
1167 PL_runops = runops_trace;
1168
1169 /* we already must be executing an SLF op, there is no other valid way
1170 * that can lead to creation of a new cctx */
1171 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1172 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1173
1174 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1175 cctx_ssl_frame = slf_frame;
1176
1177 slf_frame.prepare = slf_prepare_set_stacklevel;
1178 slf_frame.check = slf_check_set_stacklevel;
1179}
1180
1181/* the tail of transfer: execute stuff we can only do after a transfer */
1182INLINE void
1183transfer_tail (pTHX)
1184{
1185 free_coro_mortal (aTHX);
1186}
1187
1188/*
1189 * this is a _very_ stripped down perl interpreter ;)
1190 */
1191static void
1192cctx_run (void *arg)
1193{
1194#ifdef USE_ITHREADS
1195# if CORO_PTHREAD
1196 PERL_SET_CONTEXT (coro_thx);
1197# endif
1198#endif
1199 {
867 dTHX; 1200 dTHX;
868 1201
869 SV *prev, *next; 1202 /* normally we would need to skip the entersub here */
1203 /* not doing so will re-execute it, which is exactly what we want */
1204 /* PL_nop = PL_nop->op_next */
1205
1206 /* inject a fake subroutine call to cctx_init */
1207 cctx_prepare (aTHX);
1208
1209 /* cctx_run is the alternative tail of transfer() */
1210 transfer_tail (aTHX);
1211
1212 /* somebody or something will hit me for both perl_run and PL_restartop */
1213 PL_restartop = PL_op;
1214 perl_run (PL_curinterp);
1215 /*
1216 * Unfortunately, there is no way to get at the return values of the
1217 * coro body here, as perl_run destroys these
1218 */
1219
1220 /*
1221 * If perl-run returns we assume exit() was being called or the coro
1222 * fell off the end, which seems to be the only valid (non-bug)
1223 * reason for perl_run to return. We try to exit by jumping to the
1224 * bootstrap-time "top" top_env, as we cannot restore the "main"
1225 * coroutine as Coro has no such concept.
1226 * This actually isn't valid with the pthread backend, but OSes requiring
1227 * that backend are too broken to do it in a standards-compliant way.
1228 */
1229 PL_top_env = main_top_env;
1230 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1231 }
1232}
1233
1234static coro_cctx *
1235cctx_new ()
1236{
1237 coro_cctx *cctx;
1238
1239 ++cctx_count;
1240 New (0, cctx, 1, coro_cctx);
1241
1242 cctx->gen = cctx_gen;
1243 cctx->flags = 0;
1244 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1245
1246 return cctx;
1247}
1248
1249/* create a new cctx only suitable as source */
1250static coro_cctx *
1251cctx_new_empty ()
1252{
1253 coro_cctx *cctx = cctx_new ();
1254
1255 cctx->sptr = 0;
1256 coro_create (&cctx->cctx, 0, 0, 0, 0);
1257
1258 return cctx;
1259}
1260
1261/* create a new cctx suitable as destination/running a perl interpreter */
1262static coro_cctx *
1263cctx_new_run ()
1264{
1265 coro_cctx *cctx = cctx_new ();
1266 void *stack_start;
1267 size_t stack_size;
1268
1269#if HAVE_MMAP
1270 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1271 /* mmap supposedly does allocate-on-write for us */
1272 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1273
1274 if (cctx->sptr != (void *)-1)
1275 {
1276 #if CORO_STACKGUARD
1277 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1278 #endif
1279 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1280 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1281 cctx->flags |= CC_MAPPED;
1282 }
1283 else
1284#endif
1285 {
1286 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1287 New (0, cctx->sptr, cctx_stacksize, long);
1288
1289 if (!cctx->sptr)
1290 {
1291 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1292 _exit (EXIT_FAILURE);
1293 }
1294
1295 stack_start = cctx->sptr;
1296 stack_size = cctx->ssize;
1297 }
1298
1299 #if CORO_USE_VALGRIND
1300 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1301 #endif
1302
1303 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1304
1305 return cctx;
1306}
1307
1308static void
1309cctx_destroy (coro_cctx *cctx)
1310{
1311 if (!cctx)
1312 return;
1313
1314 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1315
1316 --cctx_count;
1317 coro_destroy (&cctx->cctx);
1318
1319 /* coro_transfer creates new, empty cctx's */
1320 if (cctx->sptr)
1321 {
1322 #if CORO_USE_VALGRIND
1323 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1324 #endif
1325
1326#if HAVE_MMAP
1327 if (cctx->flags & CC_MAPPED)
1328 munmap (cctx->sptr, cctx->ssize);
1329 else
1330#endif
1331 Safefree (cctx->sptr);
1332 }
1333
1334 Safefree (cctx);
1335}
1336
1337/* wether this cctx should be destructed */
1338#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1339
1340static coro_cctx *
1341cctx_get (pTHX)
1342{
1343 while (expect_true (cctx_first))
1344 {
1345 coro_cctx *cctx = cctx_first;
1346 cctx_first = cctx->next;
1347 --cctx_idle;
1348
1349 if (expect_true (!CCTX_EXPIRED (cctx)))
1350 return cctx;
1351
1352 cctx_destroy (cctx);
1353 }
1354
1355 return cctx_new_run ();
1356}
1357
1358static void
1359cctx_put (coro_cctx *cctx)
1360{
1361 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1362
1363 /* free another cctx if overlimit */
1364 if (expect_false (cctx_idle >= cctx_max_idle))
1365 {
1366 coro_cctx *first = cctx_first;
1367 cctx_first = first->next;
1368 --cctx_idle;
1369
1370 cctx_destroy (first);
1371 }
1372
1373 ++cctx_idle;
1374 cctx->next = cctx_first;
1375 cctx_first = cctx;
1376}
1377
1378/** coroutine switching *****************************************************/
1379
1380static void
1381transfer_check (pTHX_ struct coro *prev, struct coro *next)
1382{
1383 /* TODO: throwing up here is considered harmful */
1384
1385 if (expect_true (prev != next))
1386 {
1387 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1388 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1389
1390 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1391 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1392
1393#if !PERL_VERSION_ATLEAST (5,10,0)
1394 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1395 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1396#endif
1397 }
1398}
1399
1400/* always use the TRANSFER macro */
1401static void NOINLINE /* noinline so we have a fixed stackframe */
1402transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1403{
1404 dSTACKLEVEL;
1405
1406 /* sometimes transfer is only called to set idle_sp */
1407 if (expect_false (!prev))
1408 {
1409 cctx_current->idle_sp = STACKLEVEL;
1410 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1411 }
1412 else if (expect_true (prev != next))
1413 {
1414 coro_cctx *cctx_prev;
1415
1416 if (expect_false (prev->flags & CF_NEW))
1417 {
1418 /* create a new empty/source context */
1419 prev->flags &= ~CF_NEW;
1420 prev->flags |= CF_RUNNING;
1421 }
1422
1423 prev->flags &= ~CF_RUNNING;
1424 next->flags |= CF_RUNNING;
1425
1426 /* first get rid of the old state */
1427 save_perl (aTHX_ prev);
1428
1429 if (expect_false (next->flags & CF_NEW))
1430 {
1431 /* need to start coroutine */
1432 next->flags &= ~CF_NEW;
1433 /* setup coroutine call */
1434 coro_setup (aTHX_ next);
1435 }
1436 else
1437 load_perl (aTHX_ next);
1438
1439 /* possibly untie and reuse the cctx */
1440 if (expect_true (
1441 cctx_current->idle_sp == STACKLEVEL
1442 && !(cctx_current->flags & CC_TRACE)
1443 && !force_cctx
1444 ))
1445 {
1446 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1447 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1448
1449 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1450 /* without this the next cctx_get might destroy the running cctx while still in use */
1451 if (expect_false (CCTX_EXPIRED (cctx_current)))
1452 if (expect_true (!next->cctx))
1453 next->cctx = cctx_get (aTHX);
1454
1455 cctx_put (cctx_current);
1456 }
1457 else
1458 prev->cctx = cctx_current;
1459
1460 ++next->usecount;
1461
1462 cctx_prev = cctx_current;
1463 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1464
1465 next->cctx = 0;
1466
1467 if (expect_false (cctx_prev != cctx_current))
1468 {
1469 cctx_prev->top_env = PL_top_env;
1470 PL_top_env = cctx_current->top_env;
1471 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1472 }
1473
1474 transfer_tail (aTHX);
1475 }
1476}
1477
1478#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1479#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1480
1481/** high level stuff ********************************************************/
1482
1483static int
1484coro_state_destroy (pTHX_ struct coro *coro)
1485{
1486 if (coro->flags & CF_DESTROYED)
1487 return 0;
1488
1489 if (coro->on_destroy)
1490 coro->on_destroy (aTHX_ coro);
1491
1492 coro->flags |= CF_DESTROYED;
1493
1494 if (coro->flags & CF_READY)
1495 {
1496 /* reduce nready, as destroying a ready coro effectively unreadies it */
1497 /* alternative: look through all ready queues and remove the coro */
1498 --coro_nready;
1499 }
1500 else
1501 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1502
1503 if (coro->mainstack
1504 && coro->mainstack != main_mainstack
1505 && coro->slot
1506 && !PL_dirty)
1507 {
1508 struct coro *current = SvSTATE_current;
1509
1510 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1511
1512 save_perl (aTHX_ current);
1513 load_perl (aTHX_ coro);
1514
1515 coro_destruct_perl (aTHX_ coro);
1516
1517 load_perl (aTHX_ current);
1518
1519 coro->slot = 0;
1520 }
1521
1522 cctx_destroy (coro->cctx);
1523 SvREFCNT_dec (coro->startcv);
1524 SvREFCNT_dec (coro->args);
1525 SvREFCNT_dec (CORO_THROW);
1526
1527 if (coro->next) coro->next->prev = coro->prev;
1528 if (coro->prev) coro->prev->next = coro->next;
1529 if (coro == coro_first) coro_first = coro->next;
1530
1531 return 1;
1532}
1533
1534static int
1535coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1536{
1537 struct coro *coro = (struct coro *)mg->mg_ptr;
1538 mg->mg_ptr = 0;
1539
1540 coro->hv = 0;
1541
1542 if (--coro->refcnt < 0)
1543 {
1544 coro_state_destroy (aTHX_ coro);
1545 Safefree (coro);
1546 }
1547
1548 return 0;
1549}
1550
1551static int
1552coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1553{
1554 struct coro *coro = (struct coro *)mg->mg_ptr;
1555
1556 ++coro->refcnt;
1557
1558 return 0;
1559}
1560
1561static MGVTBL coro_state_vtbl = {
1562 0, 0, 0, 0,
1563 coro_state_free,
1564 0,
1565#ifdef MGf_DUP
1566 coro_state_dup,
1567#else
1568# define MGf_DUP 0
1569#endif
1570};
1571
1572static void
1573prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1574{
1575 ta->prev = SvSTATE (prev_sv);
1576 ta->next = SvSTATE (next_sv);
1577 TRANSFER_CHECK (*ta);
1578}
1579
1580static void
1581api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1582{
1583 struct coro_transfer_args ta;
1584
1585 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1586 TRANSFER (ta, 1);
1587}
1588
1589/*****************************************************************************/
1590/* gensub: simple closure generation utility */
1591
1592#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1593
1594/* create a closure from XS, returns a code reference */
1595/* the arg can be accessed via GENSUB_ARG from the callback */
1596/* the callback must use dXSARGS/XSRETURN */
1597static SV *
1598gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1599{
1600 CV *cv = (CV *)newSV (0);
1601
1602 sv_upgrade ((SV *)cv, SVt_PVCV);
1603
1604 CvANON_on (cv);
1605 CvISXSUB_on (cv);
1606 CvXSUB (cv) = xsub;
1607 GENSUB_ARG = arg;
1608
1609 return newRV_noinc ((SV *)cv);
1610}
1611
1612/** Coro ********************************************************************/
1613
1614INLINE void
1615coro_enq (pTHX_ struct coro *coro)
1616{
1617 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1618}
1619
1620INLINE SV *
1621coro_deq (pTHX)
1622{
1623 int prio;
1624
1625 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1626 if (AvFILLp (coro_ready [prio]) >= 0)
1627 return av_shift (coro_ready [prio]);
1628
1629 return 0;
1630}
1631
1632static int
1633api_ready (pTHX_ SV *coro_sv)
1634{
1635 struct coro *coro;
1636 SV *sv_hook;
1637 void (*xs_hook)(void);
1638
1639 coro = SvSTATE (coro_sv);
1640
1641 if (coro->flags & CF_READY)
1642 return 0;
1643
1644 coro->flags |= CF_READY;
1645
1646 sv_hook = coro_nready ? 0 : coro_readyhook;
1647 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1648
1649 coro_enq (aTHX_ coro);
1650 ++coro_nready;
1651
1652 if (sv_hook)
1653 {
1654 dSP;
1655
1656 ENTER;
1657 SAVETMPS;
1658
1659 PUSHMARK (SP);
1660 PUTBACK;
1661 call_sv (sv_hook, G_VOID | G_DISCARD);
1662
1663 FREETMPS;
1664 LEAVE;
1665 }
1666
1667 if (xs_hook)
1668 xs_hook ();
1669
1670 return 1;
1671}
1672
1673static int
1674api_is_ready (pTHX_ SV *coro_sv)
1675{
1676 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1677}
1678
1679/* expects to own a reference to next->hv */
1680INLINE void
1681prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1682{
870 SV *current = GvSV (coro_current); 1683 SV *prev_sv = SvRV (coro_current);
871 1684
1685 ta->prev = SvSTATE_hv (prev_sv);
1686 ta->next = next;
1687
1688 TRANSFER_CHECK (*ta);
1689
1690 SvRV_set (coro_current, (SV *)next->hv);
1691
1692 free_coro_mortal (aTHX);
1693 coro_mortal = prev_sv;
1694}
1695
1696static void
1697prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1698{
872 for (;;) 1699 for (;;)
873 { 1700 {
874 LOCK;
875
876 next = coro_deq (aTHX_ PRIO_MIN); 1701 SV *next_sv = coro_deq (aTHX);
877 1702
878 if (next) 1703 if (expect_true (next_sv))
1704 {
1705 struct coro *next = SvSTATE_hv (next_sv);
1706
1707 /* cannot transfer to destroyed coros, skip and look for next */
1708 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1709 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1710 else
1711 {
1712 next->flags &= ~CF_READY;
1713 --coro_nready;
1714
1715 prepare_schedule_to (aTHX_ ta, next);
879 break; 1716 break;
1717 }
1718 }
1719 else
1720 {
1721 /* nothing to schedule: call the idle handler */
1722 if (SvROK (sv_idle)
1723 && SvOBJECT (SvRV (sv_idle)))
1724 {
1725 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1726 api_ready (aTHX_ SvRV (sv_idle));
1727 --coro_nready;
1728 }
1729 else
1730 {
1731 dSP;
880 1732
881 UNLOCK; 1733 ENTER;
1734 SAVETMPS;
1735
1736 PUSHMARK (SP);
1737 PUTBACK;
1738 call_sv (sv_idle, G_VOID | G_DISCARD);
1739
1740 FREETMPS;
1741 LEAVE;
1742 }
1743 }
1744 }
1745}
1746
1747INLINE void
1748prepare_cede (pTHX_ struct coro_transfer_args *ta)
1749{
1750 api_ready (aTHX_ coro_current);
1751 prepare_schedule (aTHX_ ta);
1752}
1753
1754INLINE void
1755prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1756{
1757 SV *prev = SvRV (coro_current);
1758
1759 if (coro_nready)
1760 {
1761 prepare_schedule (aTHX_ ta);
1762 api_ready (aTHX_ prev);
1763 }
1764 else
1765 prepare_nop (aTHX_ ta);
1766}
1767
1768static void
1769api_schedule (pTHX)
1770{
1771 struct coro_transfer_args ta;
1772
1773 prepare_schedule (aTHX_ &ta);
1774 TRANSFER (ta, 1);
1775}
1776
1777static void
1778api_schedule_to (pTHX_ SV *coro_sv)
1779{
1780 struct coro_transfer_args ta;
1781 struct coro *next = SvSTATE (coro_sv);
1782
1783 SvREFCNT_inc_NN (coro_sv);
1784 prepare_schedule_to (aTHX_ &ta, next);
1785}
1786
1787static int
1788api_cede (pTHX)
1789{
1790 struct coro_transfer_args ta;
1791
1792 prepare_cede (aTHX_ &ta);
1793
1794 if (expect_true (ta.prev != ta.next))
1795 {
1796 TRANSFER (ta, 1);
1797 return 1;
1798 }
1799 else
1800 return 0;
1801}
1802
1803static int
1804api_cede_notself (pTHX)
1805{
1806 if (coro_nready)
1807 {
1808 struct coro_transfer_args ta;
1809
1810 prepare_cede_notself (aTHX_ &ta);
1811 TRANSFER (ta, 1);
1812 return 1;
1813 }
1814 else
1815 return 0;
1816}
1817
1818static void
1819api_trace (pTHX_ SV *coro_sv, int flags)
1820{
1821 struct coro *coro = SvSTATE (coro_sv);
1822
1823 if (coro->flags & CF_RUNNING)
1824 croak ("cannot enable tracing on a running coroutine, caught");
1825
1826 if (flags & CC_TRACE)
1827 {
1828 if (!coro->cctx)
1829 coro->cctx = cctx_new_run ();
1830 else if (!(coro->cctx->flags & CC_TRACE))
1831 croak ("cannot enable tracing on coroutine with custom stack, caught");
1832
1833 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1834 }
1835 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1836 {
1837 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1838
1839 if (coro->flags & CF_RUNNING)
1840 PL_runops = RUNOPS_DEFAULT;
1841 else
1842 coro->slot->runops = RUNOPS_DEFAULT;
1843 }
1844}
1845
1846static void
1847coro_call_on_destroy (pTHX_ struct coro *coro)
1848{
1849 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1850 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1851
1852 if (on_destroyp)
1853 {
1854 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1855
1856 while (AvFILLp (on_destroy) >= 0)
1857 {
1858 dSP; /* don't disturb outer sp */
1859 SV *cb = av_pop (on_destroy);
1860
1861 PUSHMARK (SP);
1862
1863 if (statusp)
1864 {
1865 int i;
1866 AV *status = (AV *)SvRV (*statusp);
1867 EXTEND (SP, AvFILLp (status) + 1);
1868
1869 for (i = 0; i <= AvFILLp (status); ++i)
1870 PUSHs (AvARRAY (status)[i]);
1871 }
1872
1873 PUTBACK;
1874 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1875 }
1876 }
1877}
1878
1879static void
1880slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1881{
1882 int i;
1883 HV *hv = (HV *)SvRV (coro_current);
1884 AV *av = newAV ();
1885
1886 av_extend (av, items - 1);
1887 for (i = 0; i < items; ++i)
1888 av_push (av, SvREFCNT_inc_NN (arg [i]));
1889
1890 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1891
1892 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1893 api_ready (aTHX_ sv_manager);
1894
1895 frame->prepare = prepare_schedule;
1896 frame->check = slf_check_repeat;
1897
1898 /* as a minor optimisation, we could unwind all stacks here */
1899 /* but that puts extra pressure on pp_slf, and is not worth much */
1900 /*coro_unwind_stacks (aTHX);*/
1901}
1902
1903/*****************************************************************************/
1904/* async pool handler */
1905
1906static int
1907slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1908{
1909 HV *hv = (HV *)SvRV (coro_current);
1910 struct coro *coro = (struct coro *)frame->data;
1911
1912 if (!coro->invoke_cb)
1913 return 1; /* loop till we have invoke */
1914 else
1915 {
1916 hv_store (hv, "desc", sizeof ("desc") - 1,
1917 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1918
1919 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
882 1920
883 { 1921 {
884 dSP; 1922 dSP;
885 1923 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
886 ENTER;
887 SAVETMPS;
888
889 PUSHMARK (SP);
890 PUTBACK; 1924 PUTBACK;
891 call_sv (GvSV (coro_idle), G_DISCARD);
892
893 FREETMPS;
894 LEAVE;
895 } 1925 }
896 }
897 1926
898 prev = SvRV (current); 1927 SvREFCNT_dec (GvAV (PL_defgv));
899 SvRV (current) = next; 1928 GvAV (PL_defgv) = coro->invoke_av;
1929 coro->invoke_av = 0;
900 1930
901 /* free this only after the transfer */ 1931 return 0;
902 coro_mortal = prev;
903
904 UNLOCK;
905
906 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
907}
908
909static int coro_cede_self;
910
911static void
912api_cede (void)
913{
914 dTHX;
915 SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
916
917 LOCK;
918
919 if (coro_cede_self)
920 { 1932 }
921 AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN]; 1933}
922 av_unshift (runqueue, 1); 1934
923 av_store (runqueue, 0, current); 1935static void
924 coro_nready++; 1936slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
925 coro_cede_self = 0; 1937{
1938 HV *hv = (HV *)SvRV (coro_current);
1939 struct coro *coro = SvSTATE_hv ((SV *)hv);
1940
1941 if (expect_true (coro->saved_deffh))
1942 {
1943 /* subsequent iteration */
1944 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1945 coro->saved_deffh = 0;
1946
1947 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1948 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1949 {
1950 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1951 coro->invoke_av = newAV ();
1952
1953 frame->prepare = prepare_nop;
1954 }
1955 else
1956 {
1957 av_clear (GvAV (PL_defgv));
1958 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1959
1960 coro->prio = 0;
1961
1962 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1963 api_trace (aTHX_ coro_current, 0);
1964
1965 frame->prepare = prepare_schedule;
1966 av_push (av_async_pool, SvREFCNT_inc (hv));
1967 }
926 } 1968 }
927 else 1969 else
928 coro_enq (aTHX_ current); 1970 {
1971 /* first iteration, simply fall through */
1972 frame->prepare = prepare_nop;
1973 }
929 1974
930 UNLOCK; 1975 frame->check = slf_check_pool_handler;
931 1976 frame->data = (void *)coro;
932 api_schedule ();
933} 1977}
934 1978
1979/*****************************************************************************/
1980/* rouse callback */
1981
1982#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1983
1984static void
1985coro_rouse_callback (pTHX_ CV *cv)
1986{
1987 dXSARGS;
1988 SV *data = (SV *)GENSUB_ARG;
1989
1990 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1991 {
1992 /* first call, set args */
1993 AV *av = newAV ();
1994 SV *coro = SvRV (data);
1995
1996 SvRV_set (data, (SV *)av);
1997 api_ready (aTHX_ coro);
1998 SvREFCNT_dec (coro);
1999
2000 /* better take a full copy of the arguments */
2001 while (items--)
2002 av_store (av, items, newSVsv (ST (items)));
2003 }
2004
2005 XSRETURN_EMPTY;
2006}
2007
2008static int
2009slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2010{
2011 SV *data = (SV *)frame->data;
2012
2013 if (CORO_THROW)
2014 return 0;
2015
2016 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2017 return 1;
2018
2019 /* now push all results on the stack */
2020 {
2021 dSP;
2022 AV *av = (AV *)SvRV (data);
2023 int i;
2024
2025 EXTEND (SP, AvFILLp (av) + 1);
2026 for (i = 0; i <= AvFILLp (av); ++i)
2027 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2028
2029 /* we have stolen the elements, so ste length to zero and free */
2030 AvFILLp (av) = -1;
2031 av_undef (av);
2032
2033 PUTBACK;
2034 }
2035
2036 return 0;
2037}
2038
2039static void
2040slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2041{
2042 SV *cb;
2043
2044 if (items)
2045 cb = arg [0];
2046 else
2047 {
2048 struct coro *coro = SvSTATE_current;
2049
2050 if (!coro->rouse_cb)
2051 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2052
2053 cb = sv_2mortal (coro->rouse_cb);
2054 coro->rouse_cb = 0;
2055 }
2056
2057 if (!SvROK (cb)
2058 || SvTYPE (SvRV (cb)) != SVt_PVCV
2059 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2060 croak ("Coro::rouse_wait called with illegal callback argument,");
2061
2062 {
2063 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2064 SV *data = (SV *)GENSUB_ARG;
2065
2066 frame->data = (void *)data;
2067 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2068 frame->check = slf_check_rouse_wait;
2069 }
2070}
2071
2072static SV *
2073coro_new_rouse_cb (pTHX)
2074{
2075 HV *hv = (HV *)SvRV (coro_current);
2076 struct coro *coro = SvSTATE_hv (hv);
2077 SV *data = newRV_inc ((SV *)hv);
2078 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2079
2080 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2081 SvREFCNT_dec (data); /* magicext increases the refcount */
2082
2083 SvREFCNT_dec (coro->rouse_cb);
2084 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2085
2086 return cb;
2087}
2088
2089/*****************************************************************************/
2090/* schedule-like-function opcode (SLF) */
2091
2092static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2093static const CV *slf_cv;
2094static SV **slf_argv;
2095static int slf_argc, slf_arga; /* count, allocated */
2096static I32 slf_ax; /* top of stack, for restore */
2097
2098/* this restores the stack in the case we patched the entersub, to */
2099/* recreate the stack frame as perl will on following calls */
2100/* since entersub cleared the stack */
2101static OP *
2102pp_restore (pTHX)
2103{
2104 int i;
2105 SV **SP = PL_stack_base + slf_ax;
2106
2107 PUSHMARK (SP);
2108
2109 EXTEND (SP, slf_argc + 1);
2110
2111 for (i = 0; i < slf_argc; ++i)
2112 PUSHs (sv_2mortal (slf_argv [i]));
2113
2114 PUSHs ((SV *)CvGV (slf_cv));
2115
2116 RETURNOP (slf_restore.op_first);
2117}
2118
2119static void
2120slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2121{
2122 SV **arg = (SV **)slf_frame.data;
2123
2124 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2125}
2126
2127static void
2128slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2129{
2130 if (items != 2)
2131 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2132
2133 frame->prepare = slf_prepare_transfer;
2134 frame->check = slf_check_nop;
2135 frame->data = (void *)arg; /* let's hope it will stay valid */
2136}
2137
2138static void
2139slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2140{
2141 frame->prepare = prepare_schedule;
2142 frame->check = slf_check_nop;
2143}
2144
2145static void
2146slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2147{
2148 struct coro *next = (struct coro *)slf_frame.data;
2149
2150 SvREFCNT_inc_NN (next->hv);
2151 prepare_schedule_to (aTHX_ ta, next);
2152}
2153
2154static void
2155slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 if (!items)
2158 croak ("Coro::schedule_to expects a coroutine argument, caught");
2159
2160 frame->data = (void *)SvSTATE (arg [0]);
2161 frame->prepare = slf_prepare_schedule_to;
2162 frame->check = slf_check_nop;
2163}
2164
2165static void
2166slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2167{
2168 api_ready (aTHX_ SvRV (coro_current));
2169
2170 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2171}
2172
2173static void
2174slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 frame->prepare = prepare_cede;
2177 frame->check = slf_check_nop;
2178}
2179
2180static void
2181slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2182{
2183 frame->prepare = prepare_cede_notself;
2184 frame->check = slf_check_nop;
2185}
2186
2187/*
2188 * these not obviously related functions are all rolled into one
2189 * function to increase chances that they all will call transfer with the same
2190 * stack offset
2191 * SLF stands for "schedule-like-function".
2192 */
2193static OP *
2194pp_slf (pTHX)
2195{
2196 I32 checkmark; /* mark SP to see how many elements check has pushed */
2197
2198 /* set up the slf frame, unless it has already been set-up */
2199 /* the latter happens when a new coro has been started */
2200 /* or when a new cctx was attached to an existing coroutine */
2201 if (expect_true (!slf_frame.prepare))
2202 {
2203 /* first iteration */
2204 dSP;
2205 SV **arg = PL_stack_base + TOPMARK + 1;
2206 int items = SP - arg; /* args without function object */
2207 SV *gv = *sp;
2208
2209 /* do a quick consistency check on the "function" object, and if it isn't */
2210 /* for us, divert to the real entersub */
2211 if (SvTYPE (gv) != SVt_PVGV
2212 || !GvCV (gv)
2213 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2214 return PL_ppaddr[OP_ENTERSUB](aTHX);
2215
2216 if (!(PL_op->op_flags & OPf_STACKED))
2217 {
2218 /* ampersand-form of call, use @_ instead of stack */
2219 AV *av = GvAV (PL_defgv);
2220 arg = AvARRAY (av);
2221 items = AvFILLp (av) + 1;
2222 }
2223
2224 /* now call the init function, which needs to set up slf_frame */
2225 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2226 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2227
2228 /* pop args */
2229 SP = PL_stack_base + POPMARK;
2230
2231 PUTBACK;
2232 }
2233
2234 /* now that we have a slf_frame, interpret it! */
2235 /* we use a callback system not to make the code needlessly */
2236 /* complicated, but so we can run multiple perl coros from one cctx */
2237
2238 do
2239 {
2240 struct coro_transfer_args ta;
2241
2242 slf_frame.prepare (aTHX_ &ta);
2243 TRANSFER (ta, 0);
2244
2245 checkmark = PL_stack_sp - PL_stack_base;
2246 }
2247 while (slf_frame.check (aTHX_ &slf_frame));
2248
2249 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2250
2251 /* exception handling */
2252 if (expect_false (CORO_THROW))
2253 {
2254 SV *exception = sv_2mortal (CORO_THROW);
2255
2256 CORO_THROW = 0;
2257 sv_setsv (ERRSV, exception);
2258 croak (0);
2259 }
2260
2261 /* return value handling - mostly like entersub */
2262 /* make sure we put something on the stack in scalar context */
2263 if (GIMME_V == G_SCALAR)
2264 {
2265 dSP;
2266 SV **bot = PL_stack_base + checkmark;
2267
2268 if (sp == bot) /* too few, push undef */
2269 bot [1] = &PL_sv_undef;
2270 else if (sp != bot + 1) /* too many, take last one */
2271 bot [1] = *sp;
2272
2273 SP = bot + 1;
2274
2275 PUTBACK;
2276 }
2277
2278 return NORMAL;
2279}
2280
2281static void
2282api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2283{
2284 int i;
2285 SV **arg = PL_stack_base + ax;
2286 int items = PL_stack_sp - arg + 1;
2287
2288 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2289
2290 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2291 && PL_op->op_ppaddr != pp_slf)
2292 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2293
2294 CvFLAGS (cv) |= CVf_SLF;
2295 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2296 slf_cv = cv;
2297
2298 /* we patch the op, and then re-run the whole call */
2299 /* we have to put the same argument on the stack for this to work */
2300 /* and this will be done by pp_restore */
2301 slf_restore.op_next = (OP *)&slf_restore;
2302 slf_restore.op_type = OP_CUSTOM;
2303 slf_restore.op_ppaddr = pp_restore;
2304 slf_restore.op_first = PL_op;
2305
2306 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2307
2308 if (PL_op->op_flags & OPf_STACKED)
2309 {
2310 if (items > slf_arga)
2311 {
2312 slf_arga = items;
2313 free (slf_argv);
2314 slf_argv = malloc (slf_arga * sizeof (SV *));
2315 }
2316
2317 slf_argc = items;
2318
2319 for (i = 0; i < items; ++i)
2320 slf_argv [i] = SvREFCNT_inc (arg [i]);
2321 }
2322 else
2323 slf_argc = 0;
2324
2325 PL_op->op_ppaddr = pp_slf;
2326 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2327
2328 PL_op = (OP *)&slf_restore;
2329}
2330
2331/*****************************************************************************/
2332/* dynamic wind */
2333
2334static void
2335on_enterleave_call (pTHX_ SV *cb)
2336{
2337 dSP;
2338
2339 PUSHSTACK;
2340
2341 PUSHMARK (SP);
2342 PUTBACK;
2343 call_sv (cb, G_VOID | G_DISCARD);
2344 SPAGAIN;
2345
2346 POPSTACK;
2347}
2348
2349static SV *
2350coro_avp_pop_and_free (pTHX_ AV **avp)
2351{
2352 AV *av = *avp;
2353 SV *res = av_pop (av);
2354
2355 if (AvFILLp (av) < 0)
2356 {
2357 *avp = 0;
2358 SvREFCNT_dec (av);
2359 }
2360
2361 return res;
2362}
2363
2364static void
2365coro_pop_on_enter (pTHX_ void *coro)
2366{
2367 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2368 SvREFCNT_dec (cb);
2369}
2370
2371static void
2372coro_pop_on_leave (pTHX_ void *coro)
2373{
2374 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2375 on_enterleave_call (aTHX_ sv_2mortal (cb));
2376}
2377
2378/*****************************************************************************/
2379/* PerlIO::cede */
2380
2381typedef struct
2382{
2383 PerlIOBuf base;
2384 NV next, every;
2385} PerlIOCede;
2386
2387static IV
2388PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2389{
2390 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2391
2392 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2393 self->next = nvtime () + self->every;
2394
2395 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2396}
2397
2398static SV *
2399PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2400{
2401 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2402
2403 return newSVnv (self->every);
2404}
2405
2406static IV
2407PerlIOCede_flush (pTHX_ PerlIO *f)
2408{
2409 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2410 double now = nvtime ();
2411
2412 if (now >= self->next)
2413 {
2414 api_cede (aTHX);
2415 self->next = now + self->every;
2416 }
2417
2418 return PerlIOBuf_flush (aTHX_ f);
2419}
2420
2421static PerlIO_funcs PerlIO_cede =
2422{
2423 sizeof(PerlIO_funcs),
2424 "cede",
2425 sizeof(PerlIOCede),
2426 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2427 PerlIOCede_pushed,
2428 PerlIOBuf_popped,
2429 PerlIOBuf_open,
2430 PerlIOBase_binmode,
2431 PerlIOCede_getarg,
2432 PerlIOBase_fileno,
2433 PerlIOBuf_dup,
2434 PerlIOBuf_read,
2435 PerlIOBuf_unread,
2436 PerlIOBuf_write,
2437 PerlIOBuf_seek,
2438 PerlIOBuf_tell,
2439 PerlIOBuf_close,
2440 PerlIOCede_flush,
2441 PerlIOBuf_fill,
2442 PerlIOBase_eof,
2443 PerlIOBase_error,
2444 PerlIOBase_clearerr,
2445 PerlIOBase_setlinebuf,
2446 PerlIOBuf_get_base,
2447 PerlIOBuf_bufsiz,
2448 PerlIOBuf_get_ptr,
2449 PerlIOBuf_get_cnt,
2450 PerlIOBuf_set_ptrcnt,
2451};
2452
2453/*****************************************************************************/
2454/* Coro::Semaphore & Coro::Signal */
2455
2456static SV *
2457coro_waitarray_new (pTHX_ int count)
2458{
2459 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2460 AV *av = newAV ();
2461 SV **ary;
2462
2463 /* unfortunately, building manually saves memory */
2464 Newx (ary, 2, SV *);
2465 AvALLOC (av) = ary;
2466#if PERL_VERSION_ATLEAST (5,10,0)
2467 AvARRAY (av) = ary;
2468#else
2469 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2470 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2471 SvPVX ((SV *)av) = (char *)ary;
2472#endif
2473 AvMAX (av) = 1;
2474 AvFILLp (av) = 0;
2475 ary [0] = newSViv (count);
2476
2477 return newRV_noinc ((SV *)av);
2478}
2479
2480/* semaphore */
2481
2482static void
2483coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2484{
2485 SV *count_sv = AvARRAY (av)[0];
2486 IV count = SvIVX (count_sv);
2487
2488 count += adjust;
2489 SvIVX (count_sv) = count;
2490
2491 /* now wake up as many waiters as are expected to lock */
2492 while (count > 0 && AvFILLp (av) > 0)
2493 {
2494 SV *cb;
2495
2496 /* swap first two elements so we can shift a waiter */
2497 AvARRAY (av)[0] = AvARRAY (av)[1];
2498 AvARRAY (av)[1] = count_sv;
2499 cb = av_shift (av);
2500
2501 if (SvOBJECT (cb))
2502 {
2503 api_ready (aTHX_ cb);
2504 --count;
2505 }
2506 else if (SvTYPE (cb) == SVt_PVCV)
2507 {
2508 dSP;
2509 PUSHMARK (SP);
2510 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2511 PUTBACK;
2512 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2513 }
2514
2515 SvREFCNT_dec (cb);
2516 }
2517}
2518
2519static void
2520coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2521{
2522 /* call $sem->adjust (0) to possibly wake up some other waiters */
2523 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2524}
2525
2526static int
2527slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2528{
2529 AV *av = (AV *)frame->data;
2530 SV *count_sv = AvARRAY (av)[0];
2531
2532 /* if we are about to throw, don't actually acquire the lock, just throw */
2533 if (CORO_THROW)
2534 return 0;
2535 else if (SvIVX (count_sv) > 0)
2536 {
2537 SvSTATE_current->on_destroy = 0;
2538
2539 if (acquire)
2540 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2541 else
2542 coro_semaphore_adjust (aTHX_ av, 0);
2543
2544 return 0;
2545 }
2546 else
2547 {
2548 int i;
2549 /* if we were woken up but can't down, we look through the whole */
2550 /* waiters list and only add us if we aren't in there already */
2551 /* this avoids some degenerate memory usage cases */
2552
2553 for (i = 1; i <= AvFILLp (av); ++i)
2554 if (AvARRAY (av)[i] == SvRV (coro_current))
2555 return 1;
2556
2557 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2558 return 1;
2559 }
2560}
2561
2562static int
2563slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2564{
2565 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2566}
2567
2568static int
2569slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2570{
2571 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2572}
2573
2574static void
2575slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2576{
2577 AV *av = (AV *)SvRV (arg [0]);
2578
2579 if (SvIVX (AvARRAY (av)[0]) > 0)
2580 {
2581 frame->data = (void *)av;
2582 frame->prepare = prepare_nop;
2583 }
2584 else
2585 {
2586 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2587
2588 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2589 frame->prepare = prepare_schedule;
2590
2591 /* to avoid race conditions when a woken-up coro gets terminated */
2592 /* we arrange for a temporary on_destroy that calls adjust (0) */
2593 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2594 }
2595}
2596
2597static void
2598slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2601 frame->check = slf_check_semaphore_down;
2602}
2603
2604static void
2605slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2606{
2607 if (items >= 2)
2608 {
2609 /* callback form */
2610 AV *av = (AV *)SvRV (arg [0]);
2611 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2612
2613 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2614
2615 if (SvIVX (AvARRAY (av)[0]) > 0)
2616 coro_semaphore_adjust (aTHX_ av, 0);
2617
2618 frame->prepare = prepare_nop;
2619 frame->check = slf_check_nop;
2620 }
2621 else
2622 {
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_wait;
2625 }
2626}
2627
2628/* signal */
2629
2630static void
2631coro_signal_wake (pTHX_ AV *av, int count)
2632{
2633 SvIVX (AvARRAY (av)[0]) = 0;
2634
2635 /* now signal count waiters */
2636 while (count > 0 && AvFILLp (av) > 0)
2637 {
2638 SV *cb;
2639
2640 /* swap first two elements so we can shift a waiter */
2641 cb = AvARRAY (av)[0];
2642 AvARRAY (av)[0] = AvARRAY (av)[1];
2643 AvARRAY (av)[1] = cb;
2644
2645 cb = av_shift (av);
2646
2647 api_ready (aTHX_ cb);
2648 sv_setiv (cb, 0); /* signal waiter */
2649 SvREFCNT_dec (cb);
2650
2651 --count;
2652 }
2653}
2654
2655static int
2656slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2657{
2658 /* if we are about to throw, also stop waiting */
2659 return SvROK ((SV *)frame->data) && !CORO_THROW;
2660}
2661
2662static void
2663slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2664{
2665 AV *av = (AV *)SvRV (arg [0]);
2666
2667 if (SvIVX (AvARRAY (av)[0]))
2668 {
2669 SvIVX (AvARRAY (av)[0]) = 0;
2670 frame->prepare = prepare_nop;
2671 frame->check = slf_check_nop;
2672 }
2673 else
2674 {
2675 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2676
2677 av_push (av, waiter);
2678
2679 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2680 frame->prepare = prepare_schedule;
2681 frame->check = slf_check_signal_wait;
2682 }
2683}
2684
2685/*****************************************************************************/
2686/* Coro::AIO */
2687
2688#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2689
2690/* helper storage struct */
2691struct io_state
2692{
2693 int errorno;
2694 I32 laststype; /* U16 in 5.10.0 */
2695 int laststatval;
2696 Stat_t statcache;
2697};
2698
2699static void
2700coro_aio_callback (pTHX_ CV *cv)
2701{
2702 dXSARGS;
2703 AV *state = (AV *)GENSUB_ARG;
2704 SV *coro = av_pop (state);
2705 SV *data_sv = newSV (sizeof (struct io_state));
2706
2707 av_extend (state, items - 1);
2708
2709 sv_upgrade (data_sv, SVt_PV);
2710 SvCUR_set (data_sv, sizeof (struct io_state));
2711 SvPOK_only (data_sv);
2712
2713 {
2714 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2715
2716 data->errorno = errno;
2717 data->laststype = PL_laststype;
2718 data->laststatval = PL_laststatval;
2719 data->statcache = PL_statcache;
2720 }
2721
2722 /* now build the result vector out of all the parameters and the data_sv */
2723 {
2724 int i;
2725
2726 for (i = 0; i < items; ++i)
2727 av_push (state, SvREFCNT_inc_NN (ST (i)));
2728 }
2729
2730 av_push (state, data_sv);
2731
2732 api_ready (aTHX_ coro);
2733 SvREFCNT_dec (coro);
2734 SvREFCNT_dec ((AV *)state);
2735}
2736
2737static int
2738slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2739{
2740 AV *state = (AV *)frame->data;
2741
2742 /* if we are about to throw, return early */
2743 /* this does not cancel the aio request, but at least */
2744 /* it quickly returns */
2745 if (CORO_THROW)
2746 return 0;
2747
2748 /* one element that is an RV? repeat! */
2749 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2750 return 1;
2751
2752 /* restore status */
2753 {
2754 SV *data_sv = av_pop (state);
2755 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2756
2757 errno = data->errorno;
2758 PL_laststype = data->laststype;
2759 PL_laststatval = data->laststatval;
2760 PL_statcache = data->statcache;
2761
2762 SvREFCNT_dec (data_sv);
2763 }
2764
2765 /* push result values */
2766 {
2767 dSP;
2768 int i;
2769
2770 EXTEND (SP, AvFILLp (state) + 1);
2771 for (i = 0; i <= AvFILLp (state); ++i)
2772 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2773
2774 PUTBACK;
2775 }
2776
2777 return 0;
2778}
2779
2780static void
2781slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2782{
2783 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2784 SV *coro_hv = SvRV (coro_current);
2785 struct coro *coro = SvSTATE_hv (coro_hv);
2786
2787 /* put our coroutine id on the state arg */
2788 av_push (state, SvREFCNT_inc_NN (coro_hv));
2789
2790 /* first see whether we have a non-zero priority and set it as AIO prio */
2791 if (coro->prio)
2792 {
2793 dSP;
2794
2795 static SV *prio_cv;
2796 static SV *prio_sv;
2797
2798 if (expect_false (!prio_cv))
2799 {
2800 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2801 prio_sv = newSViv (0);
2802 }
2803
2804 PUSHMARK (SP);
2805 sv_setiv (prio_sv, coro->prio);
2806 XPUSHs (prio_sv);
2807
2808 PUTBACK;
2809 call_sv (prio_cv, G_VOID | G_DISCARD);
2810 }
2811
2812 /* now call the original request */
2813 {
2814 dSP;
2815 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2816 int i;
2817
2818 PUSHMARK (SP);
2819
2820 /* first push all args to the stack */
2821 EXTEND (SP, items + 1);
2822
2823 for (i = 0; i < items; ++i)
2824 PUSHs (arg [i]);
2825
2826 /* now push the callback closure */
2827 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2828
2829 /* now call the AIO function - we assume our request is uncancelable */
2830 PUTBACK;
2831 call_sv ((SV *)req, G_VOID | G_DISCARD);
2832 }
2833
2834 /* now that the requets is going, we loop toll we have a result */
2835 frame->data = (void *)state;
2836 frame->prepare = prepare_schedule;
2837 frame->check = slf_check_aio_req;
2838}
2839
2840static void
2841coro_aio_req_xs (pTHX_ CV *cv)
2842{
2843 dXSARGS;
2844
2845 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2846
2847 XSRETURN_EMPTY;
2848}
2849
2850/*****************************************************************************/
2851
2852#if CORO_CLONE
2853# include "clone.c"
2854#endif
2855
935MODULE = Coro::State PACKAGE = Coro::State 2856MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936 2857
937PROTOTYPES: DISABLE 2858PROTOTYPES: DISABLE
938 2859
939BOOT: 2860BOOT:
940{ 2861{
941#ifdef USE_ITHREADS 2862#ifdef USE_ITHREADS
942 MUTEX_INIT (&coro_mutex); 2863# if CORO_PTHREAD
2864 coro_thx = PERL_GET_CONTEXT;
2865# endif
943#endif 2866#endif
944 BOOT_PAGESIZE; 2867 BOOT_PAGESIZE;
945 2868
2869 cctx_current = cctx_new_empty ();
2870
2871 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2872 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2873
2874 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2875 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2876 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2877
2878 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2879 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2880 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2881
946 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2882 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947 2883
948 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2884 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
949 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2885 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
950 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2886 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2887 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
951 2888
952 main_mainstack = PL_mainstack; 2889 main_mainstack = PL_mainstack;
2890 main_top_env = PL_top_env;
953 2891
2892 while (main_top_env->je_prev)
2893 main_top_env = main_top_env->je_prev;
2894
2895 {
2896 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2897
2898 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2899 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2900
2901 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2902 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2903 }
2904
954 coroapi.ver = CORO_API_VERSION; 2905 coroapi.ver = CORO_API_VERSION;
2906 coroapi.rev = CORO_API_REVISION;
2907
955 coroapi.transfer = api_transfer; 2908 coroapi.transfer = api_transfer;
956 2909
957 Newz (0, main_stack, 1, coro_stack); 2910 coroapi.sv_state = SvSTATE_;
958 main_stack->idle_sp = (void *)-1; 2911 coroapi.execute_slf = api_execute_slf;
2912 coroapi.prepare_nop = prepare_nop;
2913 coroapi.prepare_schedule = prepare_schedule;
2914 coroapi.prepare_cede = prepare_cede;
2915 coroapi.prepare_cede_notself = prepare_cede_notself;
2916
2917 {
2918 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2919
2920 if (!svp) croak ("Time::HiRes is required");
2921 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2922
2923 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2924 }
959 2925
960 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2926 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961} 2927}
962 2928
963SV * 2929SV *
964new (char *klass, ...) 2930new (char *klass, ...)
2931 ALIAS:
2932 Coro::new = 1
965 CODE: 2933 CODE:
966{ 2934{
967 struct coro *coro; 2935 struct coro *coro;
2936 MAGIC *mg;
968 HV *hv; 2937 HV *hv;
2938 CV *cb;
969 int i; 2939 int i;
970 2940
2941 if (items > 1)
2942 {
2943 cb = coro_sv_2cv (aTHX_ ST (1));
2944
2945 if (!ix)
2946 {
2947 if (CvISXSUB (cb))
2948 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2949
2950 if (!CvROOT (cb))
2951 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2952 }
2953 }
2954
971 Newz (0, coro, 1, struct coro); 2955 Newz (0, coro, 1, struct coro);
972 coro->args = newAV (); 2956 coro->args = newAV ();
2957 coro->flags = CF_NEW;
973 2958
2959 if (coro_first) coro_first->prev = coro;
2960 coro->next = coro_first;
2961 coro_first = coro;
2962
974 hv = newHV (); 2963 coro->hv = hv = newHV ();
975 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2964 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2965 mg->mg_flags |= MGf_DUP;
976 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2966 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977 2967
978 av_push (coro->args, newSVsv (RETVAL)); 2968 if (items > 1)
2969 {
2970 av_extend (coro->args, items - 1 + ix - 1);
2971
2972 if (ix)
2973 {
2974 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2975 cb = cv_coro_run;
2976 }
2977
2978 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2979
979 for (i = 1; i < items; i++) 2980 for (i = 2; i < items; i++)
980 av_push (coro->args, newSVsv (ST (i))); 2981 av_push (coro->args, newSVsv (ST (i)));
981 2982 }
982 coro->stack = main_stack;
983 /*coro->mainstack = 0; *//*actual work is done inside transfer */
984 /*coro->stack = 0;*/
985} 2983}
986 OUTPUT: 2984 OUTPUT:
987 RETVAL 2985 RETVAL
988 2986
989void 2987void
990transfer (prev, next, flags) 2988transfer (...)
991 SV *prev 2989 PROTOTYPE: $$
992 SV *next 2990 CODE:
993 int flags 2991 CORO_EXECUTE_SLF_XS (slf_init_transfer);
994 CODE:
995 PUTBACK;
996 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997 SPAGAIN;
998 2992
999int 2993bool
1000prio (Coro::State coro, int newprio = 0) 2994_destroy (SV *coro_sv)
1001 ALIAS: 2995 CODE:
1002 nice = 1 2996 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1003 CODE: 2997 OUTPUT:
1004{ 2998 RETVAL
1005 RETVAL = coro->prio;
1006
1007 if (items > 1)
1008 {
1009 if (ix)
1010 newprio += coro->prio;
1011
1012 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1013 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1014
1015 coro->prio = newprio;
1016 }
1017}
1018 2999
1019void 3000void
1020_clear_idle_sp (Coro::State self)
1021 CODE:
1022 self->stack->idle_sp = 0;
1023
1024void
1025_clone_state_from (SV *dst, SV *src)
1026 CODE:
1027{
1028 struct coro *coro_src = SvSTATE (src);
1029
1030 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031
1032 ++coro_src->refcnt;
1033 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1034}
1035
1036void
1037_exit (code) 3001_exit (int code)
1038 int code
1039 PROTOTYPE: $ 3002 PROTOTYPE: $
1040 CODE: 3003 CODE:
1041 _exit (code); 3004 _exit (code);
1042 3005
1043MODULE = Coro::State PACKAGE = Coro::Cont 3006SV *
3007clone (Coro::State coro)
3008 CODE:
3009{
3010#if CORO_CLONE
3011 struct coro *ncoro = coro_clone (aTHX_ coro);
3012 MAGIC *mg;
3013 /* TODO: too much duplication */
3014 ncoro->hv = newHV ();
3015 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3016 mg->mg_flags |= MGf_DUP;
3017 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3018#else
3019 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3020#endif
3021}
3022 OUTPUT:
3023 RETVAL
3024
3025int
3026cctx_stacksize (int new_stacksize = 0)
3027 PROTOTYPE: ;$
3028 CODE:
3029 RETVAL = cctx_stacksize;
3030 if (new_stacksize)
3031 {
3032 cctx_stacksize = new_stacksize;
3033 ++cctx_gen;
3034 }
3035 OUTPUT:
3036 RETVAL
3037
3038int
3039cctx_max_idle (int max_idle = 0)
3040 PROTOTYPE: ;$
3041 CODE:
3042 RETVAL = cctx_max_idle;
3043 if (max_idle > 1)
3044 cctx_max_idle = max_idle;
3045 OUTPUT:
3046 RETVAL
3047
3048int
3049cctx_count ()
3050 PROTOTYPE:
3051 CODE:
3052 RETVAL = cctx_count;
3053 OUTPUT:
3054 RETVAL
3055
3056int
3057cctx_idle ()
3058 PROTOTYPE:
3059 CODE:
3060 RETVAL = cctx_idle;
3061 OUTPUT:
3062 RETVAL
1044 3063
1045void 3064void
1046yield (...) 3065list ()
1047 PROTOTYPE: @ 3066 PROTOTYPE:
3067 PPCODE:
3068{
3069 struct coro *coro;
3070 for (coro = coro_first; coro; coro = coro->next)
3071 if (coro->hv)
3072 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3073}
3074
3075void
3076call (Coro::State coro, SV *coderef)
3077 ALIAS:
3078 eval = 1
3079 CODE:
3080{
3081 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3082 {
3083 struct coro *current = SvSTATE_current;
3084
3085 if (current != coro)
3086 {
3087 PUTBACK;
3088 save_perl (aTHX_ current);
3089 load_perl (aTHX_ coro);
3090 SPAGAIN;
3091 }
3092
3093 PUSHSTACK;
3094
3095 PUSHMARK (SP);
3096 PUTBACK;
3097
3098 if (ix)
3099 eval_sv (coderef, 0);
3100 else
3101 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3102
3103 SPAGAIN;
3104 POPSTACK;
3105
3106 if (current != coro)
3107 {
3108 PUTBACK;
3109 save_perl (aTHX_ coro);
3110 load_perl (aTHX_ current);
3111 SPAGAIN;
3112 }
3113 }
3114}
3115
3116SV *
3117is_ready (Coro::State coro)
3118 PROTOTYPE: $
3119 ALIAS:
3120 is_ready = CF_READY
3121 is_running = CF_RUNNING
3122 is_new = CF_NEW
3123 is_destroyed = CF_DESTROYED
3124 is_suspended = CF_SUSPENDED
3125 CODE:
3126 RETVAL = boolSV (coro->flags & ix);
3127 OUTPUT:
3128 RETVAL
3129
3130void
3131throw (Coro::State self, SV *throw = &PL_sv_undef)
3132 PROTOTYPE: $;$
1048 CODE: 3133 CODE:
1049{ 3134{
1050 SV *yieldstack; 3135 struct coro *current = SvSTATE_current;
1051 SV *sv; 3136 SV **throwp = self == current ? &CORO_THROW : &self->except;
1052 AV *defav = GvAV (PL_defgv); 3137 SvREFCNT_dec (*throwp);
1053 struct coro *prev, *next; 3138 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3139}
1054 3140
1055 yieldstack = *hv_fetch ( 3141void
1056 (HV *)SvRV (GvSV (coro_current)), 3142api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1057 "yieldstack", sizeof ("yieldstack") - 1, 3143 PROTOTYPE: $;$
3144 C_ARGS: aTHX_ coro, flags
3145
3146SV *
3147has_cctx (Coro::State coro)
3148 PROTOTYPE: $
3149 CODE:
3150 /* maybe manage the running flag differently */
3151 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3152 OUTPUT:
3153 RETVAL
3154
3155int
3156is_traced (Coro::State coro)
3157 PROTOTYPE: $
3158 CODE:
3159 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3160 OUTPUT:
3161 RETVAL
3162
3163UV
3164rss (Coro::State coro)
3165 PROTOTYPE: $
3166 ALIAS:
3167 usecount = 1
3168 CODE:
3169 switch (ix)
3170 {
3171 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3172 case 1: RETVAL = coro->usecount; break;
1058 0 3173 }
3174 OUTPUT:
3175 RETVAL
3176
3177void
3178force_cctx ()
3179 PROTOTYPE:
3180 CODE:
3181 cctx_current->idle_sp = 0;
3182
3183void
3184swap_defsv (Coro::State self)
3185 PROTOTYPE: $
3186 ALIAS:
3187 swap_defav = 1
3188 CODE:
3189 if (!self->slot)
3190 croak ("cannot swap state with coroutine that has no saved state,");
3191 else
1059 ); 3192 {
3193 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3194 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1060 3195
1061 /* set up @_ -- ugly */ 3196 SV *tmp = *src; *src = *dst; *dst = tmp;
1062 av_clear (defav); 3197 }
1063 av_fill (defav, items - 1);
1064 while (items--)
1065 av_store (defav, items, SvREFCNT_inc (ST(items)));
1066 3198
1067 sv = av_pop ((AV *)SvRV (yieldstack)); 3199void
1068 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0)); 3200cancel (Coro::State self)
1069 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0)); 3201 CODE:
1070 SvREFCNT_dec (sv); 3202 coro_state_destroy (aTHX_ self);
3203 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
1071 3204
1072 coro_state_transfer (aTHX_ prev, next, 0);
1073}
1074 3205
1075MODULE = Coro::State PACKAGE = Coro 3206MODULE = Coro::State PACKAGE = Coro
1076 3207
1077BOOT: 3208BOOT:
1078{ 3209{
1079 int i; 3210 int i;
1080 3211
3212 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3213 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3214 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3215 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3216 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3217 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3218 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3219 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3220 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3221
3222 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3223 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3224 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3225 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3226
1081 coro_stash = gv_stashpv ("Coro", TRUE); 3227 coro_stash = gv_stashpv ("Coro", TRUE);
1082 3228
1083 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1084 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1085 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3231 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3232 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3233 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3234 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089 3235
1090 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1091 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1092
1093 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3236 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094 coro_ready[i] = newAV (); 3237 coro_ready[i] = newAV ();
1095 3238
1096 { 3239 {
1097 SV *sv = perl_get_sv("Coro::API", 1); 3240 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1098 3241
1099 coroapi.schedule = api_schedule; 3242 coroapi.schedule = api_schedule;
3243 coroapi.schedule_to = api_schedule_to;
1100 coroapi.cede = api_cede; 3244 coroapi.cede = api_cede;
3245 coroapi.cede_notself = api_cede_notself;
1101 coroapi.ready = api_ready; 3246 coroapi.ready = api_ready;
3247 coroapi.is_ready = api_is_ready;
1102 coroapi.nready = &coro_nready; 3248 coroapi.nready = coro_nready;
1103 coroapi.current = coro_current; 3249 coroapi.current = coro_current;
1104 3250
1105 GCoroAPI = &coroapi; 3251 /*GCoroAPI = &coroapi;*/
1106 sv_setiv (sv, (IV)&coroapi); 3252 sv_setiv (sv, (IV)&coroapi);
1107 SvREADONLY_on (sv); 3253 SvREADONLY_on (sv);
1108 } 3254 }
1109} 3255}
1110 3256
1111void 3257void
3258terminate (...)
3259 CODE:
3260 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3261
3262void
3263schedule (...)
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3266
3267void
3268schedule_to (...)
3269 CODE:
3270 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3271
3272void
3273cede_to (...)
3274 CODE:
3275 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3276
3277void
3278cede (...)
3279 CODE:
3280 CORO_EXECUTE_SLF_XS (slf_init_cede);
3281
3282void
3283cede_notself (...)
3284 CODE:
3285 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3286
3287void
3288_set_current (SV *current)
3289 PROTOTYPE: $
3290 CODE:
3291 SvREFCNT_dec (SvRV (coro_current));
3292 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3293
3294void
3295_set_readyhook (SV *hook)
3296 PROTOTYPE: $
3297 CODE:
3298 SvREFCNT_dec (coro_readyhook);
3299 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3300
3301int
3302prio (Coro::State coro, int newprio = 0)
3303 PROTOTYPE: $;$
3304 ALIAS:
3305 nice = 1
3306 CODE:
3307{
3308 RETVAL = coro->prio;
3309
3310 if (items > 1)
3311 {
3312 if (ix)
3313 newprio = coro->prio - newprio;
3314
3315 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3316 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3317
3318 coro->prio = newprio;
3319 }
3320}
3321 OUTPUT:
3322 RETVAL
3323
3324SV *
1112ready (SV *self) 3325ready (SV *self)
1113 PROTOTYPE: $ 3326 PROTOTYPE: $
1114 CODE: 3327 CODE:
1115 api_ready (self); 3328 RETVAL = boolSV (api_ready (aTHX_ self));
3329 OUTPUT:
3330 RETVAL
1116 3331
1117int 3332int
1118nready (...) 3333nready (...)
1119 PROTOTYPE: 3334 PROTOTYPE:
1120 CODE: 3335 CODE:
1121 RETVAL = coro_nready; 3336 RETVAL = coro_nready;
1122 OUTPUT: 3337 OUTPUT:
1123 RETVAL 3338 RETVAL
1124 3339
1125void 3340void
1126schedule (...) 3341_pool_handler (...)
1127 PROTOTYPE:
1128 CODE: 3342 CODE:
1129 api_schedule (); 3343 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1130 3344
1131void 3345void
1132_set_cede_self () 3346async_pool (SV *cv, ...)
3347 PROTOTYPE: &@
3348 PPCODE:
3349{
3350 HV *hv = (HV *)av_pop (av_async_pool);
3351 AV *av = newAV ();
3352 SV *cb = ST (0);
3353 int i;
3354
3355 av_extend (av, items - 2);
3356 for (i = 1; i < items; ++i)
3357 av_push (av, SvREFCNT_inc_NN (ST (i)));
3358
3359 if ((SV *)hv == &PL_sv_undef)
3360 {
3361 PUSHMARK (SP);
3362 EXTEND (SP, 2);
3363 PUSHs (sv_Coro);
3364 PUSHs ((SV *)cv_pool_handler);
3365 PUTBACK;
3366 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3367 SPAGAIN;
3368
3369 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3370 }
3371
3372 {
3373 struct coro *coro = SvSTATE_hv (hv);
3374
3375 assert (!coro->invoke_cb);
3376 assert (!coro->invoke_av);
3377 coro->invoke_cb = SvREFCNT_inc (cb);
3378 coro->invoke_av = av;
3379 }
3380
3381 api_ready (aTHX_ (SV *)hv);
3382
3383 if (GIMME_V != G_VOID)
3384 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3385 else
3386 SvREFCNT_dec (hv);
3387}
3388
3389SV *
3390rouse_cb ()
3391 PROTOTYPE:
1133 CODE: 3392 CODE:
1134 coro_cede_self = 1; 3393 RETVAL = coro_new_rouse_cb (aTHX);
1135
1136void
1137cede (...)
1138 PROTOTYPE:
1139 CODE:
1140 api_cede ();
1141
1142MODULE = Coro::State PACKAGE = Coro::AIO
1143
1144SV *
1145_get_state ()
1146 CODE:
1147{
1148 struct {
1149 int errorno;
1150 int laststype;
1151 int laststatval;
1152 Stat_t statcache;
1153 } data;
1154
1155 data.errorno = errno;
1156 data.laststype = PL_laststype;
1157 data.laststatval = PL_laststatval;
1158 data.statcache = PL_statcache;
1159
1160 RETVAL = newSVpvn ((char *)&data, sizeof data);
1161}
1162 OUTPUT: 3394 OUTPUT:
1163 RETVAL 3395 RETVAL
1164 3396
1165void 3397void
1166_set_state (char *data_) 3398rouse_wait (...)
3399 PROTOTYPE: ;$
3400 PPCODE:
3401 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3402
3403void
3404on_enter (SV *block)
3405 ALIAS:
3406 on_leave = 1
1167 PROTOTYPE: $ 3407 PROTOTYPE: &
1168 CODE: 3408 CODE:
1169{ 3409{
1170 struct { 3410 struct coro *coro = SvSTATE_current;
3411 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3412
3413 block = (SV *)coro_sv_2cv (aTHX_ block);
3414
3415 if (!*avp)
3416 *avp = newAV ();
3417
3418 av_push (*avp, SvREFCNT_inc (block));
3419
3420 if (!ix)
3421 on_enterleave_call (aTHX_ block);
3422
3423 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3424 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3425 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3426}
3427
3428
3429MODULE = Coro::State PACKAGE = PerlIO::cede
3430
3431BOOT:
3432 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3433
3434
3435MODULE = Coro::State PACKAGE = Coro::Semaphore
3436
3437SV *
3438new (SV *klass, SV *count = 0)
3439 CODE:
3440 RETVAL = sv_bless (
3441 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3442 GvSTASH (CvGV (cv))
3443 );
3444 OUTPUT:
3445 RETVAL
3446
3447# helper for Coro::Channel
3448SV *
3449_alloc (int count)
3450 CODE:
3451 RETVAL = coro_waitarray_new (aTHX_ count);
3452 OUTPUT:
3453 RETVAL
3454
3455SV *
3456count (SV *self)
3457 CODE:
3458 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3459 OUTPUT:
3460 RETVAL
3461
3462void
3463up (SV *self, int adjust = 1)
3464 ALIAS:
3465 adjust = 1
3466 CODE:
3467 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3468
3469void
3470down (...)
3471 CODE:
3472 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3473
3474void
3475wait (...)
3476 CODE:
3477 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3478
3479void
3480try (SV *self)
3481 PPCODE:
3482{
3483 AV *av = (AV *)SvRV (self);
3484 SV *count_sv = AvARRAY (av)[0];
3485 IV count = SvIVX (count_sv);
3486
3487 if (count > 0)
3488 {
3489 --count;
3490 SvIVX (count_sv) = count;
3491 XSRETURN_YES;
3492 }
3493 else
3494 XSRETURN_NO;
3495}
3496
3497void
3498waiters (SV *self)
3499 PPCODE:
3500{
3501 AV *av = (AV *)SvRV (self);
3502 int wcount = AvFILLp (av) + 1 - 1;
3503
3504 if (GIMME_V == G_SCALAR)
3505 XPUSHs (sv_2mortal (newSViv (wcount)));
3506 else
3507 {
1171 int errorno; 3508 int i;
1172 int laststype; 3509 EXTEND (SP, wcount);
1173 int laststatval; 3510 for (i = 1; i <= wcount; ++i)
1174 Stat_t statcache; 3511 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1175 } *data = (void *)data_; 3512 }
1176
1177 errno = data->errorno;
1178 PL_laststype = data->laststype;
1179 PL_laststatval = data->laststatval;
1180 PL_statcache = data->statcache;
1181} 3513}
3514
3515MODULE = Coro::State PACKAGE = Coro::Signal
3516
3517SV *
3518new (SV *klass)
3519 CODE:
3520 RETVAL = sv_bless (
3521 coro_waitarray_new (aTHX_ 0),
3522 GvSTASH (CvGV (cv))
3523 );
3524 OUTPUT:
3525 RETVAL
3526
3527void
3528wait (...)
3529 CODE:
3530 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3531
3532void
3533broadcast (SV *self)
3534 CODE:
3535{
3536 AV *av = (AV *)SvRV (self);
3537 coro_signal_wake (aTHX_ av, AvFILLp (av));
3538}
3539
3540void
3541send (SV *self)
3542 CODE:
3543{
3544 AV *av = (AV *)SvRV (self);
3545
3546 if (AvFILLp (av))
3547 coro_signal_wake (aTHX_ av, 1);
3548 else
3549 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3550}
3551
3552IV
3553awaited (SV *self)
3554 CODE:
3555 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3556 OUTPUT:
3557 RETVAL
3558
3559
3560MODULE = Coro::State PACKAGE = Coro::AnyEvent
3561
3562BOOT:
3563 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3564
3565void
3566_schedule (...)
3567 CODE:
3568{
3569 static int incede;
3570
3571 api_cede_notself (aTHX);
3572
3573 ++incede;
3574 while (coro_nready >= incede && api_cede (aTHX))
3575 ;
3576
3577 sv_setsv (sv_activity, &PL_sv_undef);
3578 if (coro_nready >= incede)
3579 {
3580 PUSHMARK (SP);
3581 PUTBACK;
3582 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3583 }
3584
3585 --incede;
3586}
3587
3588
3589MODULE = Coro::State PACKAGE = Coro::AIO
3590
3591void
3592_register (char *target, char *proto, SV *req)
3593 CODE:
3594{
3595 CV *req_cv = coro_sv_2cv (aTHX_ req);
3596 /* newXSproto doesn't return the CV on 5.8 */
3597 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3598 sv_setpv ((SV *)slf_cv, proto);
3599 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3600}
3601

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