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Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.356 by root, Sat Jun 27 14:06:59 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
33 114
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 116# undef CORO_STACKGUARD
36#endif 117#endif
37 118
38#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 120# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
51# endif 161# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 162#endif
60#endif
61 163
62#define SUB_INIT "Coro::State::initialize" 164static double (*nvtime)(); /* so why doesn't it take void? */
63#define UCORO_STATE "_coro_state"
64 165
65/* The next macro should declare a variable stacklevel that contains and approximation 166/* we hijack an hopefully unused CV flag for our purposes */
66 * to the current C stack pointer. Its property is that it changes with each call 167#define CVf_SLF 0x4000
67 * and should be unique. */ 168static OP *pp_slf (pTHX);
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69 169
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 170static U32 cctx_gen;
71 171static size_t cctx_stacksize = CORO_STACKSIZE;
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
87static HV *coro_state_stash; 175static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 177
92/* this is actually not only the c stack but also c registers etc... */ 178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
93typedef struct { 213typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 214{
95 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
98 coro_context cctx; 225 coro_context cctx;
99 226
100 void *sptr; 227 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
102} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
103 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
244};
245
246/* the structure where most of the perl state is stored, overlaid on the cxstack */
247typedef struct
248{
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253 HV *hinthv;
254#define VAR(name,type) type name;
255# include "state.h"
256#undef VAR
257} perl_slots;
258
259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
260
261/* this is a structure representing a perl-level coroutine */
104struct coro { 262struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 263 /* the C coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 264 coro_cctx *cctx;
107 265
108 /* the optional C context */ 266 /* ready queue */
109 coro_stack *stack; 267 struct coro *next_ready;
110 void *cursp;
111 int gencnt;
112 268
113 /* optionally saved, might be zero */ 269 /* state data */
114 AV *defav; 270 struct CoroSLF slf_frame; /* saved slf frame */
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 271 AV *mainstack;
126 SV **stack_sp; 272 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 273
274 CV *startcv; /* the CV to execute */
153 /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
154 AV *args; 276 int refcnt; /* coroutines are refcounted, yes */
277 int flags; /* CF_ flags */
278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
280
281 /* statistics */
282 int usecount; /* number of transfers to this coro */
283
284 /* coro process data */
285 int prio;
286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
288
289 /* async_pool */
290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
297
298 /* linked list */
299 struct coro *next, *prev;
155}; 300};
156 301
157typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
159 304
160static AV * 305/* the following variables are effectively part of the perl context */
161coro_clone_padlist (pTHX_ CV *cv) 306/* and get copied between struct coro and these variables */
162{ 307/* the mainr easonw e don't support windows process emulation */
163 AV *padlist = CvPADLIST (cv); 308static struct CoroSLF slf_frame; /* the current slf frame */
164 AV *newpadlist, *newpad;
165
166 newpadlist = newAV ();
167 AvREAL_off (newpadlist);
168#if PERL_VERSION < 9
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#endif
173 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174 --AvFILLp (padlist);
175
176 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
177 av_store (newpadlist, 1, (SV *)newpad);
178
179 return newpadlist;
180}
181
182static void
183free_padlist (pTHX_ AV *padlist)
184{
185 /* may be during global destruction */
186 if (SvREFCNT (padlist))
187 {
188 I32 i = AvFILLp (padlist);
189 while (i >= 0)
190 {
191 SV **svp = av_fetch (padlist, i--, FALSE);
192 if (svp)
193 {
194 SV *sv;
195 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
196 SvREFCNT_dec (sv);
197
198 SvREFCNT_dec (*svp);
199 }
200 }
201
202 SvREFCNT_dec ((SV*)padlist);
203 }
204}
205
206static int
207coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
208{
209 AV *padlist;
210 AV *av = (AV *)mg->mg_obj;
211
212 /* casting is fun. */
213 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214 free_padlist (aTHX_ padlist);
215
216 SvREFCNT_dec (av);
217
218 return 0;
219}
220
221#define PERL_MAGIC_coro PERL_MAGIC_ext
222
223static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224
225/* the next two functions merely cache the padlists */
226static void
227get_padlist (pTHX_ CV *cv)
228{
229 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
230
231 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
232 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
233 else
234 {
235#if 0
236 /* this should work - but it doesn't :( */
237 CV *cp = Perl_cv_clone (aTHX_ cv);
238 CvPADLIST (cv) = CvPADLIST (cp);
239 CvPADLIST (cp) = 0;
240 SvREFCNT_dec (cp);
241#else
242 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
243#endif
244 }
245}
246
247static void
248put_padlist (pTHX_ CV *cv)
249{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
251
252 if (!mg)
253 {
254 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256 mg->mg_virtual = &vtbl_coro;
257 mg->mg_obj = (SV *)newAV ();
258 }
259
260 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
261}
262
263#define SB do {
264#define SE } while (0)
265
266#define LOAD(state) load_state(aTHX_ (state));
267#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
268
269#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
270
271static void
272load_state(pTHX_ Coro__State c)
273{
274 PL_dowarn = c->dowarn;
275 PL_in_eval = c->in_eval;
276
277 PL_curstackinfo = c->curstackinfo;
278 PL_curstack = c->curstack;
279 PL_mainstack = c->mainstack;
280 PL_stack_sp = c->stack_sp;
281 PL_op = c->op;
282 PL_curpad = c->curpad;
283 PL_comppad = c->comppad;
284 PL_compcv = c->compcv;
285 PL_stack_base = c->stack_base;
286 PL_stack_max = c->stack_max;
287 PL_tmps_stack = c->tmps_stack;
288 PL_tmps_floor = c->tmps_floor;
289 PL_tmps_ix = c->tmps_ix;
290 PL_tmps_max = c->tmps_max;
291 PL_markstack = c->markstack;
292 PL_markstack_ptr = c->markstack_ptr;
293 PL_markstack_max = c->markstack_max;
294 PL_scopestack = c->scopestack;
295 PL_scopestack_ix = c->scopestack_ix;
296 PL_scopestack_max = c->scopestack_max;
297 PL_savestack = c->savestack;
298 PL_savestack_ix = c->savestack_ix;
299 PL_savestack_max = c->savestack_max;
300#if PERL_VERSION < 9
301 PL_retstack = c->retstack;
302 PL_retstack_ix = c->retstack_ix;
303 PL_retstack_max = c->retstack_max;
304#endif
305 PL_curpm = c->curpm;
306 PL_curcop = c->curcop;
307 PL_top_env = c->top_env;
308
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312
313 {
314 dSP;
315 CV *cv;
316
317 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs))
319 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist;
326 }
327
328 ++CvDEPTH(cv);
329 }
330
331 PUTBACK;
332 }
333}
334
335static void
336save_state(pTHX_ Coro__State c, int flags)
337{
338 {
339 dSP;
340 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo;
343
344 /*
345 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :(
347 */
348
349 PUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */
351 for (;;)
352 {
353 while (cxix >= 0)
354 {
355 PERL_CONTEXT *cx = &ccstk[cxix--];
356
357 if (CxTYPE(cx) == CXt_SUB)
358 {
359 CV *cv = cx->blk_sub.cv;
360 if (CvDEPTH(cv))
361 {
362 EXTEND (SP, CvDEPTH(cv)*2);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv));
372 PUSHs ((SV *)cv);
373
374 get_padlist (aTHX_ cv);
375 }
376 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 }
386
387 if (top_si->si_type == PERLSI_MAIN)
388 break;
389
390 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix;
393 }
394
395 PUTBACK;
396 }
397
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
401
402 c->dowarn = PL_dowarn;
403 c->in_eval = PL_in_eval;
404
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp;
409 c->op = PL_op;
410 c->curpad = PL_curpad;
411 c->comppad = PL_comppad;
412 c->compcv = PL_compcv;
413 c->stack_base = PL_stack_base;
414 c->stack_max = PL_stack_max;
415 c->tmps_stack = PL_tmps_stack;
416 c->tmps_floor = PL_tmps_floor;
417 c->tmps_ix = PL_tmps_ix;
418 c->tmps_max = PL_tmps_max;
419 c->markstack = PL_markstack;
420 c->markstack_ptr = PL_markstack_ptr;
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435 c->top_env = PL_top_env;
436}
437
438/*
439 * allocate various perl stacks. This is an exact copy
440 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace.
443 */
444static void
445coro_init_stacks (pTHX)
446{
447 LOCK;
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453
454 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457
458 New(50,PL_tmps_stack,96,SV*);
459 PL_tmps_floor = -1;
460 PL_tmps_ix = -1;
461 PL_tmps_max = 96;
462
463 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16;
466
467#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET;
469#endif
470
471 New(54,PL_scopestack,16,I32);
472 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16;
474
475 New(54,PL_savestack,96,ANY);
476 PL_savestack_ix = 0;
477 PL_savestack_max = 96;
478
479#if PERL_VERSION < 9
480 New(54,PL_retstack,8,OP*);
481 PL_retstack_ix = 0;
482 PL_retstack_max = 8;
483#endif
484
485 UNLOCK;
486}
487
488/*
489 * destroy the stacks, the callchain etc...
490 */
491static void
492destroy_stacks(pTHX)
493{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 LEAVE_SCOPE (0);
498
499 /* sure it is, but more important: is it correct?? :/ */
500 FREETMPS;
501
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 }
504
505 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next;
507
508 while (PL_curstackinfo)
509 {
510 PERL_SI *p = PL_curstackinfo->si_prev;
511
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523
524 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p;
527 }
528
529 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack);
531 Safefree (PL_scopestack);
532 Safefree (PL_savestack);
533#if PERL_VERSION < 9
534 Safefree (PL_retstack);
535#endif
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548
549 if (alloc)
550 {
551#if HAVE_MMAP
552 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554 if (stack->sptr != (void *)-1)
555 {
556# if STACKGUARD
557 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558# endif
559 }
560 else
561#endif
562 {
563 stack->ssize = - (STACKSIZE * (long)sizeof (long));
564 New (0, stack->sptr, STACKSIZE, long);
565 }
566 }
567 else
568 stack->sptr = 0;
569
570 ctx->stack = stack;
571}
572
573static void
574deallocate_stack (Coro__State ctx)
575{
576 coro_stack *stack = ctx->stack;
577
578 ctx->stack = 0;
579
580 if (stack)
581 {
582 if (!--stack->refcnt)
583 {
584#ifdef HAVE_MMAP
585 if (stack->ssize > 0 && stack->sptr)
586 munmap (stack->sptr, stack->ssize);
587 else
588#endif
589 Safefree (stack->sptr);
590
591 Safefree (stack);
592 }
593 else if (ctx->gencnt == stack->gencnt)
594 --stack->usecnt;
595 }
596}
597
598static void
599setup_coro (void *arg)
600{
601 /*
602 * emulate part of the perl startup here.
603 */
604 dTHX;
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX);
610 /*PL_curcop = 0;*/
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */
612 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614
615 SPAGAIN;
616
617 if (ctx->stack)
618 {
619 ctx->cursp = 0;
620
621 PUSHMARK(SP);
622 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625 if (SvTRUE (ERRSV))
626 croak (NULL);
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 }
630 else
631 {
632 UNOP myop;
633
634 PL_op = (OP *)&myop;
635
636 Zero(&myop, 1, UNOP);
637 myop.op_next = Nullop;
638 myop.op_flags = OPf_WANT_VOID;
639
640 PUSHMARK(SP);
641 XPUSHs (sub_init);
642 /*
643 * the next line is slightly wrong, as PL_op->op_next
644 * is actually being executed so we skip the first op.
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651 SPAGAIN;
652
653 ENTER; /* necessary e.g. for dounwind */
654 }
655}
656
657static void
658continue_coro (void *arg)
659{
660 /*
661 * this is a _very_ stripped down perl interpreter ;)
662 */
663 dTHX;
664 Coro__State ctx = (Coro__State)arg;
665
666 PL_top_env = &ctx->start_env;
667
668 ctx->cursp = 0;
669 PL_op = PL_op->op_next;
670 CALLRUNOPS(aTHX);
671
672 abort ();
673}
674
675static void
676transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677{
678 dSTACKLEVEL;
679
680 if (prev != next)
681 {
682 if (next->mainstack)
683 {
684 LOCK;
685 SAVE (prev, flags);
686 LOAD (next);
687 UNLOCK;
688
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 {
696 if (!prev->stack)
697 allocate_stack (prev, 0);
698 else if (prev->cursp != stacklevel
699 && prev->stack->usecnt > 1)
700 {
701 prev->gencnt = ++prev->stack->gencnt;
702 prev->stack->usecnt = 1;
703 }
704
705 /* has our stack been invalidated? */
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 {
708 deallocate_stack (next);
709 allocate_stack (next, 1);
710 coro_create (&(next->stack->cctx),
711 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize));
713 }
714
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else
725 {
726 LOCK;
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729
730 if (flags & TRANSFER_SAVE_CCTXT)
731 {
732 if (!prev->stack)
733 allocate_stack (prev, 0);
734
735 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736 {
737 PL_top_env = &next->start_env;
738
739 setup_coro (next);
740 next->cursp = stacklevel;
741
742 prev->stack->refcnt++;
743 prev->stack->usecnt++;
744 next->stack = prev->stack;
745 next->gencnt = prev->gencnt;
746 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 }
759 else
760 {
761 setup_coro (next);
762 next->cursp = stacklevel;
763 }
764 }
765 }
766
767 LOCK;
768 if (coro_mortal)
769 {
770 SvREFCNT_dec (coro_mortal);
771 coro_mortal = 0;
772 }
773 UNLOCK;
774}
775
776#define SV_CORO(sv,func) \
777 do { \
778 if (SvROK (sv)) \
779 sv = SvRV (sv); \
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))
798
799static void
800api_transfer(pTHX_ SV *prev, SV *next, int flags)
801{
802 SV_CORO (prev, "Coro::transfer");
803 SV_CORO (next, "Coro::transfer");
804
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
806}
807 309
808/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
809 311
810#define PRIO_MAX 3 312#define PRIO_MAX 3
811#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
813#define PRIO_LOW -1 315#define PRIO_LOW -1
814#define PRIO_IDLE -3 316#define PRIO_IDLE -3
815#define PRIO_MIN -4 317#define PRIO_MIN -4
816 318
817/* for Coro.pm */ 319/* for Coro.pm */
818static GV *coro_current, *coro_idle; 320static SV *coro_current;
819static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
820static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
324static struct coro *coro_first;
325#define coro_nready coroapi.nready
821 326
822static void 327/** lowlevel stuff **********************************************************/
823coro_enq (pTHX_ SV *sv)
824{
825 SV **xprio;
826 int prio;
827
828 if (SvTYPE (sv) != SVt_PVHV)
829 croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834 prio = prio > PRIO_MAX ? PRIO_MAX
835 : prio < PRIO_MIN ? PRIO_MIN
836 : prio;
837
838 av_push (coro_ready [prio - PRIO_MIN], sv);
839 coro_nready++;
840}
841 328
842static SV * 329static SV *
843coro_deq (pTHX_ int min_prio) 330coro_get_sv (pTHX_ const char *name, int create)
844{ 331{
845 int prio = PRIO_MAX - PRIO_MIN; 332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_sv (name, create);
335#endif
336 return get_sv (name, create);
337}
846 338
847 min_prio -= PRIO_MIN; 339static AV *
848 if (min_prio < 0) 340coro_get_av (pTHX_ const char *name, int create)
849 min_prio = 0; 341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_av (name, create);
345#endif
346 return get_av (name, create);
347}
850 348
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 349static HV *
852 if (av_len (coro_ready[prio]) >= 0) 350coro_get_hv (pTHX_ const char *name, int create)
853 { 351{
854 coro_nready--; 352#if PERL_VERSION_ATLEAST (5,10,0)
855 return av_shift (coro_ready[prio]); 353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
856 } 354 get_hv (name, create);
355#endif
356 return get_hv (name, create);
357}
857 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
858 return 0; 370 return cv;
859} 371}
860 372
861static void 373/*****************************************************************************/
862api_ready (SV *coro) 374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
863{ 394{
864 dTHX; 395 HV *stash;
396 MAGIC *mg;
865 397
866 if (SvROK (coro)) 398 if (SvROK (coro))
867 coro = SvRV (coro); 399 coro = SvRV (coro);
868 400
869 LOCK; 401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
870 coro_enq (aTHX_ SvREFCNT_inc (coro)); 402 croak ("Coro::State object required");
871 UNLOCK;
872}
873 403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
425static AV *
426coro_derive_padlist (pTHX_ CV *cv)
427{
428 AV *padlist = CvPADLIST (cv);
429 AV *newpadlist, *newpad;
430
431 newpadlist = newAV ();
432 AvREAL_off (newpadlist);
433#if PERL_VERSION_ATLEAST (5,10,0)
434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
435#else
436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
437#endif
438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
439 --AvFILLp (padlist);
440
441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
442 av_store (newpadlist, 1, (SV *)newpad);
443
444 return newpadlist;
445}
446
447static void
448free_padlist (pTHX_ AV *padlist)
449{
450 /* may be during global destruction */
451 if (!IN_DESTRUCT)
452 {
453 I32 i = AvFILLp (padlist);
454
455 while (i > 0) /* special-case index 0 */
456 {
457 /* we try to be extra-careful here */
458 AV *av = (AV *)AvARRAY (padlist)[i--];
459 I32 j = AvFILLp (av);
460
461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
465 SvREFCNT_dec (av);
466 }
467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
471 SvREFCNT_dec ((SV*)padlist);
472 }
473}
474
874static void 475static int
875api_schedule (void) 476coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
876{ 477{
478 AV *padlist;
479 AV *av = (AV *)mg->mg_obj;
480
481 /* casting is fun. */
482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
483 free_padlist (aTHX_ padlist);
484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
487 return 0;
488}
489
490static MGVTBL coro_cv_vtbl = {
491 0, 0, 0, 0,
492 coro_cv_free
493};
494
495/* the next two functions merely cache the padlists */
496static void
497get_padlist (pTHX_ CV *cv)
498{
499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
501
502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
504 else
505 {
506#if CORO_PREFER_PERL_FUNCTIONS
507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
509 CV *cp = Perl_cv_clone (aTHX_ cv);
510 CvPADLIST (cv) = CvPADLIST (cp);
511 CvPADLIST (cp) = 0;
512 SvREFCNT_dec (cp);
513#else
514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
515#endif
516 }
517}
518
519static void
520put_padlist (pTHX_ CV *cv)
521{
522 MAGIC *mg = CORO_MAGIC_cv (cv);
523 AV *av;
524
525 if (expect_false (!mg))
526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
527
528 av = (AV *)mg->mg_obj;
529
530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
531 av_extend (av, AvFILLp (av) + 1);
532
533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
534}
535
536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
542load_perl (pTHX_ Coro__State c)
543{
544 perl_slots *slot = c->slot;
545 c->slot = 0;
546
547 PL_mainstack = c->mainstack;
548
549 GvSV (PL_defgv) = slot->defsv;
550 GvAV (PL_defgv) = slot->defav;
551 GvSV (PL_errgv) = slot->errsv;
552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
554
555 #define VAR(name,type) PL_ ## name = slot->name;
556 # include "state.h"
557 #undef VAR
558
559 {
560 dSP;
561
562 CV *cv;
563
564 /* now do the ugly restore mess */
565 while (expect_true (cv = (CV *)POPs))
566 {
567 put_padlist (aTHX_ cv); /* mark this padlist as available */
568 CvDEPTH (cv) = PTR2IV (POPs);
569 CvPADLIST (cv) = (AV *)POPs;
570 }
571
572 PUTBACK;
573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
585}
586
587static void
588save_perl (pTHX_ Coro__State c)
589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
601 {
602 dSP;
603 I32 cxix = cxstack_ix;
604 PERL_CONTEXT *ccstk = cxstack;
605 PERL_SI *top_si = PL_curstackinfo;
606
607 /*
608 * the worst thing you can imagine happens first - we have to save
609 * (and reinitialize) all cv's in the whole callchain :(
610 */
611
612 XPUSHs (Nullsv);
613 /* this loop was inspired by pp_caller */
614 for (;;)
615 {
616 while (expect_true (cxix >= 0))
617 {
618 PERL_CONTEXT *cx = &ccstk[cxix--];
619
620 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
621 {
622 CV *cv = cx->blk_sub.cv;
623
624 if (expect_true (CvDEPTH (cv)))
625 {
626 EXTEND (SP, 3);
627 PUSHs ((SV *)CvPADLIST (cv));
628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
629 PUSHs ((SV *)cv);
630
631 CvDEPTH (cv) = 0;
632 get_padlist (aTHX_ cv);
633 }
634 }
635 }
636
637 if (expect_true (top_si->si_type == PERLSI_MAIN))
638 break;
639
640 top_si = top_si->si_prev;
641 ccstk = top_si->si_cxstack;
642 cxix = top_si->si_cxix;
643 }
644
645 PUTBACK;
646 }
647
648 /* allocate some space on the context stack for our purposes */
649 /* we manually unroll here, as usually 2 slots is enough */
650 if (SLOT_COUNT >= 1) CXINC;
651 if (SLOT_COUNT >= 2) CXINC;
652 if (SLOT_COUNT >= 3) CXINC;
653 {
654 int i;
655 for (i = 3; i < SLOT_COUNT; ++i)
656 CXINC;
657 }
658 cxstack_ix -= SLOT_COUNT; /* undo allocation */
659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
665 slot->defav = GvAV (PL_defgv);
666 slot->defsv = DEFSV;
667 slot->errsv = ERRSV;
668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675}
676
677/*
678 * allocate various perl stacks. This is almost an exact copy
679 * of perl.c:init_stacks, except that it uses less memory
680 * on the (sometimes correct) assumption that coroutines do
681 * not usually need a lot of stackspace.
682 */
683#if CORO_PREFER_PERL_FUNCTIONS
684# define coro_init_stacks(thx) init_stacks ()
685#else
686static void
687coro_init_stacks (pTHX)
688{
689 PL_curstackinfo = new_stackinfo(32, 8);
690 PL_curstackinfo->si_type = PERLSI_MAIN;
691 PL_curstack = PL_curstackinfo->si_stack;
692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
693
694 PL_stack_base = AvARRAY(PL_curstack);
695 PL_stack_sp = PL_stack_base;
696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
697
698 New(50,PL_tmps_stack,32,SV*);
699 PL_tmps_floor = -1;
700 PL_tmps_ix = -1;
701 PL_tmps_max = 32;
702
703 New(54,PL_markstack,16,I32);
704 PL_markstack_ptr = PL_markstack;
705 PL_markstack_max = PL_markstack + 16;
706
707#ifdef SET_MARK_OFFSET
708 SET_MARK_OFFSET;
709#endif
710
711 New(54,PL_scopestack,8,I32);
712 PL_scopestack_ix = 0;
713 PL_scopestack_max = 8;
714
715 New(54,PL_savestack,24,ANY);
716 PL_savestack_ix = 0;
717 PL_savestack_max = 24;
718
719#if !PERL_VERSION_ATLEAST (5,10,0)
720 New(54,PL_retstack,4,OP*);
721 PL_retstack_ix = 0;
722 PL_retstack_max = 4;
723#endif
724}
725#endif
726
727/*
728 * destroy the stacks, the callchain etc...
729 */
730static void
731coro_destruct_stacks (pTHX)
732{
733 while (PL_curstackinfo->si_next)
734 PL_curstackinfo = PL_curstackinfo->si_next;
735
736 while (PL_curstackinfo)
737 {
738 PERL_SI *p = PL_curstackinfo->si_prev;
739
740 if (!IN_DESTRUCT)
741 SvREFCNT_dec (PL_curstackinfo->si_stack);
742
743 Safefree (PL_curstackinfo->si_cxstack);
744 Safefree (PL_curstackinfo);
745 PL_curstackinfo = p;
746 }
747
748 Safefree (PL_tmps_stack);
749 Safefree (PL_markstack);
750 Safefree (PL_scopestack);
751 Safefree (PL_savestack);
752#if !PERL_VERSION_ATLEAST (5,10,0)
753 Safefree (PL_retstack);
754#endif
755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
766static size_t
767coro_rss (pTHX_ struct coro *coro)
768{
769 size_t rss = sizeof (*coro);
770
771 if (coro->mainstack)
772 {
773 if (coro->flags & CF_RUNNING)
774 {
775 #define SYM(sym) PL_ ## sym
776 CORO_RSS;
777 #undef SYM
778 }
779 else
780 {
781 #define SYM(sym) coro->slot->sym
782 CORO_RSS;
783 #undef SYM
784 }
785 }
786
787 return rss;
788}
789
790/** coroutine stack handling ************************************************/
791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
901coro_setup (pTHX_ struct coro *coro)
902{
903 /*
904 * emulate part of the perl startup here.
905 */
906 coro_init_stacks (aTHX);
907
908 PL_runops = RUNOPS_DEFAULT;
909 PL_curcop = &PL_compiling;
910 PL_in_eval = EVAL_NULL;
911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
915 PL_curpm = 0;
916 PL_curpad = 0;
917 PL_localizing = 0;
918 PL_dirty = 0;
919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
928
929 GvSV (PL_defgv) = newSV (0);
930 GvAV (PL_defgv) = coro->args; coro->args = 0;
931 GvSV (PL_errgv) = newSV (0);
932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
934 PL_rs = newSVsv (GvSV (irsgv));
935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
936
937 {
938 dSP;
939 UNOP myop;
940
941 Zero (&myop, 1, UNOP);
942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
944 myop.op_flags = OPf_WANT_VOID;
945
946 PUSHMARK (SP);
947 PUSHs ((SV *)coro->startcv);
948 PUTBACK;
949 PL_op = (OP *)&myop;
950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
951 }
952
953 /* this newly created coroutine might be run on an existing cctx which most
954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
971static void
972coro_unwind_stacks (pTHX)
973{
974 if (!IN_DESTRUCT)
975 {
976 /* restore all saved variables and stuff */
977 LEAVE_SCOPE (0);
978 assert (PL_tmps_floor == -1);
979
980 /* free all temporaries */
981 FREETMPS;
982 assert (PL_tmps_ix == -1);
983
984 /* unwind all extra stacks */
985 POPSTACK_TO (PL_mainstack);
986
987 /* unwind main stack */
988 dounwind (-1);
989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 SV *svf [9];
996
997 {
998 struct coro *current = SvSTATE_current;
999
1000 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1001
1002 save_perl (aTHX_ current);
1003 load_perl (aTHX_ coro);
1004
1005 coro_unwind_stacks (aTHX);
1006 coro_destruct_stacks (aTHX);
1007
1008 // now save some sv's to be free'd later
1009 svf [0] = GvSV (PL_defgv);
1010 svf [1] = (SV *)GvAV (PL_defgv);
1011 svf [2] = GvSV (PL_errgv);
1012 svf [3] = (SV *)PL_defoutgv;
1013 svf [4] = PL_rs;
1014 svf [5] = GvSV (irsgv);
1015 svf [6] = (SV *)GvHV (PL_hintgv);
1016 svf [7] = PL_diehook;
1017 svf [8] = PL_warnhook;
1018 assert (9 == sizeof (svf) / sizeof (*svf));
1019
1020 load_perl (aTHX_ current);
1021 }
1022
1023 {
1024 int i;
1025
1026 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1027 SvREFCNT_dec (svf [i]);
1028
1029 SvREFCNT_dec (coro->saved_deffh);
1030 SvREFCNT_dec (coro->rouse_cb);
1031 SvREFCNT_dec (coro->invoke_cb);
1032 SvREFCNT_dec (coro->invoke_av);
1033 }
1034}
1035
1036INLINE void
1037free_coro_mortal (pTHX)
1038{
1039 if (expect_true (coro_mortal))
1040 {
1041 SvREFCNT_dec (coro_mortal);
1042 coro_mortal = 0;
1043 }
1044}
1045
1046static int
1047runops_trace (pTHX)
1048{
1049 COP *oldcop = 0;
1050 int oldcxix = -2;
1051
1052 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1053 {
1054 PERL_ASYNC_CHECK ();
1055
1056 if (cctx_current->flags & CC_TRACE_ALL)
1057 {
1058 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1059 {
1060 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1061 SV **bot, **top;
1062 AV *av = newAV (); /* return values */
1063 SV **cb;
1064 dSP;
1065
1066 GV *gv = CvGV (cx->blk_sub.cv);
1067 SV *fullname = sv_2mortal (newSV (0));
1068 if (isGV (gv))
1069 gv_efullname3 (fullname, gv, 0);
1070
1071 bot = PL_stack_base + cx->blk_oldsp + 1;
1072 top = cx->blk_gimme == G_ARRAY ? SP + 1
1073 : cx->blk_gimme == G_SCALAR ? bot + 1
1074 : bot;
1075
1076 av_extend (av, top - bot);
1077 while (bot < top)
1078 av_push (av, SvREFCNT_inc_NN (*bot++));
1079
1080 PL_runops = RUNOPS_DEFAULT;
1081 ENTER;
1082 SAVETMPS;
1083 EXTEND (SP, 3);
1084 PUSHMARK (SP);
1085 PUSHs (&PL_sv_no);
1086 PUSHs (fullname);
1087 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1088 PUTBACK;
1089 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1090 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1091 SPAGAIN;
1092 FREETMPS;
1093 LEAVE;
1094 PL_runops = runops_trace;
1095 }
1096
1097 if (oldcop != PL_curcop)
1098 {
1099 oldcop = PL_curcop;
1100
1101 if (PL_curcop != &PL_compiling)
1102 {
1103 SV **cb;
1104
1105 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1106 {
1107 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1108
1109 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1110 {
1111 dSP;
1112 GV *gv = CvGV (cx->blk_sub.cv);
1113 SV *fullname = sv_2mortal (newSV (0));
1114
1115 if (isGV (gv))
1116 gv_efullname3 (fullname, gv, 0);
1117
1118 PL_runops = RUNOPS_DEFAULT;
1119 ENTER;
1120 SAVETMPS;
1121 EXTEND (SP, 3);
1122 PUSHMARK (SP);
1123 PUSHs (&PL_sv_yes);
1124 PUSHs (fullname);
1125 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1126 PUTBACK;
1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1129 SPAGAIN;
1130 FREETMPS;
1131 LEAVE;
1132 PL_runops = runops_trace;
1133 }
1134
1135 oldcxix = cxstack_ix;
1136 }
1137
1138 if (cctx_current->flags & CC_TRACE_LINE)
1139 {
1140 dSP;
1141
1142 PL_runops = RUNOPS_DEFAULT;
1143 ENTER;
1144 SAVETMPS;
1145 EXTEND (SP, 3);
1146 PL_runops = RUNOPS_DEFAULT;
1147 PUSHMARK (SP);
1148 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1149 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1150 PUTBACK;
1151 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1152 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1153 SPAGAIN;
1154 FREETMPS;
1155 LEAVE;
1156 PL_runops = runops_trace;
1157 }
1158 }
1159 }
1160 }
1161 }
1162
1163 TAINT_NOT;
1164 return 0;
1165}
1166
1167static struct CoroSLF cctx_ssl_frame;
1168
1169static void
1170slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1171{
1172 ta->prev = 0;
1173}
1174
1175static int
1176slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1177{
1178 *frame = cctx_ssl_frame;
1179
1180 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1181}
1182
1183/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1184static void NOINLINE
1185cctx_prepare (pTHX)
1186{
1187 PL_top_env = &PL_start_env;
1188
1189 if (cctx_current->flags & CC_TRACE)
1190 PL_runops = runops_trace;
1191
1192 /* we already must be executing an SLF op, there is no other valid way
1193 * that can lead to creation of a new cctx */
1194 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1195 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1196
1197 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1198 cctx_ssl_frame = slf_frame;
1199
1200 slf_frame.prepare = slf_prepare_set_stacklevel;
1201 slf_frame.check = slf_check_set_stacklevel;
1202}
1203
1204/* the tail of transfer: execute stuff we can only do after a transfer */
1205INLINE void
1206transfer_tail (pTHX)
1207{
1208 free_coro_mortal (aTHX);
1209}
1210
1211/*
1212 * this is a _very_ stripped down perl interpreter ;)
1213 */
1214static void
1215cctx_run (void *arg)
1216{
1217#ifdef USE_ITHREADS
1218# if CORO_PTHREAD
1219 PERL_SET_CONTEXT (coro_thx);
1220# endif
1221#endif
1222 {
877 dTHX; 1223 dTHX;
878 1224
879 SV *prev, *next; 1225 /* normally we would need to skip the entersub here */
1226 /* not doing so will re-execute it, which is exactly what we want */
1227 /* PL_nop = PL_nop->op_next */
880 1228
881 LOCK; 1229 /* inject a fake subroutine call to cctx_init */
1230 cctx_prepare (aTHX);
882 1231
1232 /* cctx_run is the alternative tail of transfer() */
1233 transfer_tail (aTHX);
1234
1235 /* somebody or something will hit me for both perl_run and PL_restartop */
1236 PL_restartop = PL_op;
1237 perl_run (PL_curinterp);
1238 /*
1239 * Unfortunately, there is no way to get at the return values of the
1240 * coro body here, as perl_run destroys these
1241 */
1242
1243 /*
1244 * If perl-run returns we assume exit() was being called or the coro
1245 * fell off the end, which seems to be the only valid (non-bug)
1246 * reason for perl_run to return. We try to exit by jumping to the
1247 * bootstrap-time "top" top_env, as we cannot restore the "main"
1248 * coroutine as Coro has no such concept.
1249 * This actually isn't valid with the pthread backend, but OSes requiring
1250 * that backend are too broken to do it in a standards-compliant way.
1251 */
1252 PL_top_env = main_top_env;
1253 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1254 }
1255}
1256
1257static coro_cctx *
1258cctx_new ()
1259{
1260 coro_cctx *cctx;
1261
1262 ++cctx_count;
1263 New (0, cctx, 1, coro_cctx);
1264
1265 cctx->gen = cctx_gen;
1266 cctx->flags = 0;
1267 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1268
1269 return cctx;
1270}
1271
1272/* create a new cctx only suitable as source */
1273static coro_cctx *
1274cctx_new_empty ()
1275{
1276 coro_cctx *cctx = cctx_new ();
1277
1278 cctx->sptr = 0;
1279 coro_create (&cctx->cctx, 0, 0, 0, 0);
1280
1281 return cctx;
1282}
1283
1284/* create a new cctx suitable as destination/running a perl interpreter */
1285static coro_cctx *
1286cctx_new_run ()
1287{
1288 coro_cctx *cctx = cctx_new ();
1289 void *stack_start;
1290 size_t stack_size;
1291
1292#if HAVE_MMAP
1293 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1294 /* mmap supposedly does allocate-on-write for us */
1295 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1296
1297 if (cctx->sptr != (void *)-1)
1298 {
1299 #if CORO_STACKGUARD
1300 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1301 #endif
1302 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1303 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1304 cctx->flags |= CC_MAPPED;
1305 }
1306 else
1307#endif
1308 {
1309 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1310 New (0, cctx->sptr, cctx_stacksize, long);
1311
1312 if (!cctx->sptr)
1313 {
1314 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1315 _exit (EXIT_FAILURE);
1316 }
1317
1318 stack_start = cctx->sptr;
1319 stack_size = cctx->ssize;
1320 }
1321
1322 #if CORO_USE_VALGRIND
1323 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1324 #endif
1325
1326 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1327
1328 return cctx;
1329}
1330
1331static void
1332cctx_destroy (coro_cctx *cctx)
1333{
1334 if (!cctx)
1335 return;
1336
1337 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1338
1339 --cctx_count;
1340 coro_destroy (&cctx->cctx);
1341
1342 /* coro_transfer creates new, empty cctx's */
1343 if (cctx->sptr)
1344 {
1345 #if CORO_USE_VALGRIND
1346 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1347 #endif
1348
1349#if HAVE_MMAP
1350 if (cctx->flags & CC_MAPPED)
1351 munmap (cctx->sptr, cctx->ssize);
1352 else
1353#endif
1354 Safefree (cctx->sptr);
1355 }
1356
1357 Safefree (cctx);
1358}
1359
1360/* wether this cctx should be destructed */
1361#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1362
1363static coro_cctx *
1364cctx_get (pTHX)
1365{
1366 while (expect_true (cctx_first))
1367 {
1368 coro_cctx *cctx = cctx_first;
1369 cctx_first = cctx->next;
1370 --cctx_idle;
1371
1372 if (expect_true (!CCTX_EXPIRED (cctx)))
1373 return cctx;
1374
1375 cctx_destroy (cctx);
1376 }
1377
1378 return cctx_new_run ();
1379}
1380
1381static void
1382cctx_put (coro_cctx *cctx)
1383{
1384 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1385
1386 /* free another cctx if overlimit */
1387 if (expect_false (cctx_idle >= cctx_max_idle))
1388 {
1389 coro_cctx *first = cctx_first;
1390 cctx_first = first->next;
1391 --cctx_idle;
1392
1393 cctx_destroy (first);
1394 }
1395
1396 ++cctx_idle;
1397 cctx->next = cctx_first;
1398 cctx_first = cctx;
1399}
1400
1401/** coroutine switching *****************************************************/
1402
1403static void
1404transfer_check (pTHX_ struct coro *prev, struct coro *next)
1405{
1406 /* TODO: throwing up here is considered harmful */
1407
1408 if (expect_true (prev != next))
1409 {
1410 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1411 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1412
1413 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1414 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1415
1416#if !PERL_VERSION_ATLEAST (5,10,0)
1417 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1418 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1419#endif
1420 }
1421}
1422
1423/* always use the TRANSFER macro */
1424static void NOINLINE /* noinline so we have a fixed stackframe */
1425transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1426{
1427 dSTACKLEVEL;
1428
1429 /* sometimes transfer is only called to set idle_sp */
1430 if (expect_false (!prev))
1431 {
1432 cctx_current->idle_sp = STACKLEVEL;
1433 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1434 }
1435 else if (expect_true (prev != next))
1436 {
1437 coro_cctx *cctx_prev;
1438
1439 if (expect_false (prev->flags & CF_NEW))
1440 {
1441 /* create a new empty/source context */
1442 prev->flags &= ~CF_NEW;
1443 prev->flags |= CF_RUNNING;
1444 }
1445
1446 prev->flags &= ~CF_RUNNING;
1447 next->flags |= CF_RUNNING;
1448
1449 /* first get rid of the old state */
1450 save_perl (aTHX_ prev);
1451
1452 if (expect_false (next->flags & CF_NEW))
1453 {
1454 /* need to start coroutine */
1455 next->flags &= ~CF_NEW;
1456 /* setup coroutine call */
1457 coro_setup (aTHX_ next);
1458 }
1459 else
1460 load_perl (aTHX_ next);
1461
1462 /* possibly untie and reuse the cctx */
1463 if (expect_true (
1464 cctx_current->idle_sp == STACKLEVEL
1465 && !(cctx_current->flags & CC_TRACE)
1466 && !force_cctx
1467 ))
1468 {
1469 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1470 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1471
1472 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1473 /* without this the next cctx_get might destroy the running cctx while still in use */
1474 if (expect_false (CCTX_EXPIRED (cctx_current)))
1475 if (expect_true (!next->cctx))
1476 next->cctx = cctx_get (aTHX);
1477
1478 cctx_put (cctx_current);
1479 }
1480 else
1481 prev->cctx = cctx_current;
1482
1483 ++next->usecount;
1484
1485 cctx_prev = cctx_current;
1486 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1487
1488 next->cctx = 0;
1489
1490 if (expect_false (cctx_prev != cctx_current))
1491 {
1492 cctx_prev->top_env = PL_top_env;
1493 PL_top_env = cctx_current->top_env;
1494 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1495 }
1496
1497 transfer_tail (aTHX);
1498 }
1499}
1500
1501#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1502#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1503
1504/** high level stuff ********************************************************/
1505
1506static int
1507coro_state_destroy (pTHX_ struct coro *coro)
1508{
1509 if (coro->flags & CF_DESTROYED)
1510 return 0;
1511
1512 if (coro->on_destroy && !PL_dirty)
1513 coro->on_destroy (aTHX_ coro);
1514
1515 coro->flags |= CF_DESTROYED;
1516
1517 if (coro->flags & CF_READY)
1518 {
1519 /* reduce nready, as destroying a ready coro effectively unreadies it */
1520 /* alternative: look through all ready queues and remove the coro */
1521 --coro_nready;
1522 }
1523 else
1524 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1525
1526 if (coro->mainstack
1527 && coro->mainstack != main_mainstack
1528 && coro->slot
1529 && !PL_dirty)
1530 coro_destruct_perl (aTHX_ coro);
1531
1532 cctx_destroy (coro->cctx);
1533 SvREFCNT_dec (coro->startcv);
1534 SvREFCNT_dec (coro->args);
1535 SvREFCNT_dec (CORO_THROW);
1536
1537 if (coro->next) coro->next->prev = coro->prev;
1538 if (coro->prev) coro->prev->next = coro->next;
1539 if (coro == coro_first) coro_first = coro->next;
1540
1541 return 1;
1542}
1543
1544static int
1545coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1546{
1547 struct coro *coro = (struct coro *)mg->mg_ptr;
1548 mg->mg_ptr = 0;
1549
1550 coro->hv = 0;
1551
1552 if (--coro->refcnt < 0)
1553 {
1554 coro_state_destroy (aTHX_ coro);
1555 Safefree (coro);
1556 }
1557
1558 return 0;
1559}
1560
1561static int
1562coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1563{
1564 struct coro *coro = (struct coro *)mg->mg_ptr;
1565
1566 ++coro->refcnt;
1567
1568 return 0;
1569}
1570
1571static MGVTBL coro_state_vtbl = {
1572 0, 0, 0, 0,
1573 coro_state_free,
1574 0,
1575#ifdef MGf_DUP
1576 coro_state_dup,
1577#else
1578# define MGf_DUP 0
1579#endif
1580};
1581
1582static void
1583prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1584{
1585 ta->prev = SvSTATE (prev_sv);
1586 ta->next = SvSTATE (next_sv);
1587 TRANSFER_CHECK (*ta);
1588}
1589
1590static void
1591api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1592{
1593 struct coro_transfer_args ta;
1594
1595 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1596 TRANSFER (ta, 1);
1597}
1598
1599/*****************************************************************************/
1600/* gensub: simple closure generation utility */
1601
1602#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1603
1604/* create a closure from XS, returns a code reference */
1605/* the arg can be accessed via GENSUB_ARG from the callback */
1606/* the callback must use dXSARGS/XSRETURN */
1607static SV *
1608gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1609{
1610 CV *cv = (CV *)newSV (0);
1611
1612 sv_upgrade ((SV *)cv, SVt_PVCV);
1613
1614 CvANON_on (cv);
1615 CvISXSUB_on (cv);
1616 CvXSUB (cv) = xsub;
1617 GENSUB_ARG = arg;
1618
1619 return newRV_noinc ((SV *)cv);
1620}
1621
1622/** Coro ********************************************************************/
1623
1624INLINE void
1625coro_enq (pTHX_ struct coro *coro)
1626{
1627 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1628
1629 SvREFCNT_inc_NN (coro->hv);
1630
1631 coro->next_ready = 0;
1632 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1633 ready [1] = coro;
1634}
1635
1636INLINE struct coro *
1637coro_deq (pTHX)
1638{
1639 int prio;
1640
1641 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1642 {
1643 struct coro **ready = coro_ready [prio];
1644
1645 if (ready [0])
1646 {
1647 struct coro *coro = ready [0];
1648 ready [0] = coro->next_ready;
1649 return coro;
1650 }
1651 }
1652
1653 return 0;
1654}
1655
1656static int
1657api_ready (pTHX_ SV *coro_sv)
1658{
1659 struct coro *coro;
1660 SV *sv_hook;
1661 void (*xs_hook)(void);
1662
1663 coro = SvSTATE (coro_sv);
1664
1665 if (coro->flags & CF_READY)
1666 return 0;
1667
1668 coro->flags |= CF_READY;
1669
1670 sv_hook = coro_nready ? 0 : coro_readyhook;
1671 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1672
1673 coro_enq (aTHX_ coro);
1674 ++coro_nready;
1675
1676 if (sv_hook)
1677 {
1678 dSP;
1679
1680 ENTER;
1681 SAVETMPS;
1682
1683 PUSHMARK (SP);
1684 PUTBACK;
1685 call_sv (sv_hook, G_VOID | G_DISCARD);
1686
1687 FREETMPS;
1688 LEAVE;
1689 }
1690
1691 if (xs_hook)
1692 xs_hook ();
1693
1694 return 1;
1695}
1696
1697static int
1698api_is_ready (pTHX_ SV *coro_sv)
1699{
1700 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1701}
1702
1703/* expects to own a reference to next->hv */
1704INLINE void
1705prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1706{
883 prev = SvRV (GvSV (coro_current)); 1707 SV *prev_sv = SvRV (coro_current);
884 next = coro_deq (aTHX_ PRIO_MIN);
885 1708
886 if (!next) 1709 ta->prev = SvSTATE_hv (prev_sv);
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1710 ta->next = next;
888 1711
889 /* free this only after the transfer */ 1712 TRANSFER_CHECK (*ta);
1713
1714 SvRV_set (coro_current, (SV *)next->hv);
1715
1716 free_coro_mortal (aTHX);
890 coro_mortal = prev; 1717 coro_mortal = prev_sv;
891 SV_CORO (prev, "Coro::schedule");
892
893 SvRV (GvSV (coro_current)) = next;
894
895 SV_CORO (next, "Coro::schedule");
896
897 UNLOCK;
898
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901} 1718}
902 1719
903static void 1720static void
904api_cede (void) 1721prepare_schedule (pTHX_ struct coro_transfer_args *ta)
905{ 1722{
906 dTHX; 1723 for (;;)
1724 {
1725 struct coro *next = coro_deq (aTHX);
907 1726
908 LOCK; 1727 if (expect_true (next))
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1728 {
910 UNLOCK; 1729 /* cannot transfer to destroyed coros, skip and look for next */
1730 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1731 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1732 else
1733 {
1734 next->flags &= ~CF_READY;
1735 --coro_nready;
911 1736
1737 prepare_schedule_to (aTHX_ ta, next);
1738 break;
1739 }
1740 }
1741 else
1742 {
1743 /* nothing to schedule: call the idle handler */
1744 if (SvROK (sv_idle)
1745 && SvOBJECT (SvRV (sv_idle)))
1746 {
1747 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1748 api_ready (aTHX_ SvRV (sv_idle));
1749 --coro_nready;
1750 }
1751 else
1752 {
1753 dSP;
1754
1755 ENTER;
1756 SAVETMPS;
1757
1758 PUSHMARK (SP);
1759 PUTBACK;
1760 call_sv (sv_idle, G_VOID | G_DISCARD);
1761
1762 FREETMPS;
1763 LEAVE;
1764 }
1765 }
1766 }
1767}
1768
1769INLINE void
1770prepare_cede (pTHX_ struct coro_transfer_args *ta)
1771{
1772 api_ready (aTHX_ coro_current);
1773 prepare_schedule (aTHX_ ta);
1774}
1775
1776INLINE void
1777prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1778{
1779 SV *prev = SvRV (coro_current);
1780
1781 if (coro_nready)
1782 {
1783 prepare_schedule (aTHX_ ta);
1784 api_ready (aTHX_ prev);
1785 }
1786 else
1787 prepare_nop (aTHX_ ta);
1788}
1789
1790static void
912 api_schedule (); 1791api_schedule (pTHX)
913} 1792{
1793 struct coro_transfer_args ta;
914 1794
1795 prepare_schedule (aTHX_ &ta);
1796 TRANSFER (ta, 1);
1797}
1798
1799static void
1800api_schedule_to (pTHX_ SV *coro_sv)
1801{
1802 struct coro_transfer_args ta;
1803 struct coro *next = SvSTATE (coro_sv);
1804
1805 SvREFCNT_inc_NN (coro_sv);
1806 prepare_schedule_to (aTHX_ &ta, next);
1807}
1808
1809static int
1810api_cede (pTHX)
1811{
1812 struct coro_transfer_args ta;
1813
1814 prepare_cede (aTHX_ &ta);
1815
1816 if (expect_true (ta.prev != ta.next))
1817 {
1818 TRANSFER (ta, 1);
1819 return 1;
1820 }
1821 else
1822 return 0;
1823}
1824
1825static int
1826api_cede_notself (pTHX)
1827{
1828 if (coro_nready)
1829 {
1830 struct coro_transfer_args ta;
1831
1832 prepare_cede_notself (aTHX_ &ta);
1833 TRANSFER (ta, 1);
1834 return 1;
1835 }
1836 else
1837 return 0;
1838}
1839
1840static void
1841api_trace (pTHX_ SV *coro_sv, int flags)
1842{
1843 struct coro *coro = SvSTATE (coro_sv);
1844
1845 if (coro->flags & CF_RUNNING)
1846 croak ("cannot enable tracing on a running coroutine, caught");
1847
1848 if (flags & CC_TRACE)
1849 {
1850 if (!coro->cctx)
1851 coro->cctx = cctx_new_run ();
1852 else if (!(coro->cctx->flags & CC_TRACE))
1853 croak ("cannot enable tracing on coroutine with custom stack, caught");
1854
1855 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1856 }
1857 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1858 {
1859 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1860
1861 if (coro->flags & CF_RUNNING)
1862 PL_runops = RUNOPS_DEFAULT;
1863 else
1864 coro->slot->runops = RUNOPS_DEFAULT;
1865 }
1866}
1867
1868static void
1869coro_call_on_destroy (pTHX_ struct coro *coro)
1870{
1871 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1872 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1873
1874 if (on_destroyp)
1875 {
1876 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1877
1878 while (AvFILLp (on_destroy) >= 0)
1879 {
1880 dSP; /* don't disturb outer sp */
1881 SV *cb = av_pop (on_destroy);
1882
1883 PUSHMARK (SP);
1884
1885 if (statusp)
1886 {
1887 int i;
1888 AV *status = (AV *)SvRV (*statusp);
1889 EXTEND (SP, AvFILLp (status) + 1);
1890
1891 for (i = 0; i <= AvFILLp (status); ++i)
1892 PUSHs (AvARRAY (status)[i]);
1893 }
1894
1895 PUTBACK;
1896 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1897 }
1898 }
1899}
1900
1901static void
1902slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 int i;
1905 HV *hv = (HV *)SvRV (coro_current);
1906 AV *av = newAV ();
1907
1908 av_extend (av, items - 1);
1909 for (i = 0; i < items; ++i)
1910 av_push (av, SvREFCNT_inc_NN (arg [i]));
1911
1912 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1913
1914 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1915 api_ready (aTHX_ sv_manager);
1916
1917 frame->prepare = prepare_schedule;
1918 frame->check = slf_check_repeat;
1919
1920 /* as a minor optimisation, we could unwind all stacks here */
1921 /* but that puts extra pressure on pp_slf, and is not worth much */
1922 /*coro_unwind_stacks (aTHX);*/
1923}
1924
1925/*****************************************************************************/
1926/* async pool handler */
1927
1928static int
1929slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1930{
1931 HV *hv = (HV *)SvRV (coro_current);
1932 struct coro *coro = (struct coro *)frame->data;
1933
1934 if (!coro->invoke_cb)
1935 return 1; /* loop till we have invoke */
1936 else
1937 {
1938 hv_store (hv, "desc", sizeof ("desc") - 1,
1939 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1940
1941 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1942
1943 {
1944 dSP;
1945 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1946 PUTBACK;
1947 }
1948
1949 SvREFCNT_dec (GvAV (PL_defgv));
1950 GvAV (PL_defgv) = coro->invoke_av;
1951 coro->invoke_av = 0;
1952
1953 return 0;
1954 }
1955}
1956
1957static void
1958slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1959{
1960 HV *hv = (HV *)SvRV (coro_current);
1961 struct coro *coro = SvSTATE_hv ((SV *)hv);
1962
1963 if (expect_true (coro->saved_deffh))
1964 {
1965 /* subsequent iteration */
1966 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1967 coro->saved_deffh = 0;
1968
1969 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1970 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1971 {
1972 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1973 coro->invoke_av = newAV ();
1974
1975 frame->prepare = prepare_nop;
1976 }
1977 else
1978 {
1979 av_clear (GvAV (PL_defgv));
1980 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1981
1982 coro->prio = 0;
1983
1984 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1985 api_trace (aTHX_ coro_current, 0);
1986
1987 frame->prepare = prepare_schedule;
1988 av_push (av_async_pool, SvREFCNT_inc (hv));
1989 }
1990 }
1991 else
1992 {
1993 /* first iteration, simply fall through */
1994 frame->prepare = prepare_nop;
1995 }
1996
1997 frame->check = slf_check_pool_handler;
1998 frame->data = (void *)coro;
1999}
2000
2001/*****************************************************************************/
2002/* rouse callback */
2003
2004#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2005
2006static void
2007coro_rouse_callback (pTHX_ CV *cv)
2008{
2009 dXSARGS;
2010 SV *data = (SV *)GENSUB_ARG;
2011
2012 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2013 {
2014 /* first call, set args */
2015 SV *coro = SvRV (data);
2016 AV *av = newAV ();
2017
2018 SvRV_set (data, (SV *)av);
2019
2020 /* better take a full copy of the arguments */
2021 while (items--)
2022 av_store (av, items, newSVsv (ST (items)));
2023
2024 api_ready (aTHX_ coro);
2025 SvREFCNT_dec (coro);
2026 }
2027
2028 XSRETURN_EMPTY;
2029}
2030
2031static int
2032slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2033{
2034 SV *data = (SV *)frame->data;
2035
2036 if (CORO_THROW)
2037 return 0;
2038
2039 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2040 return 1;
2041
2042 /* now push all results on the stack */
2043 {
2044 dSP;
2045 AV *av = (AV *)SvRV (data);
2046 int i;
2047
2048 EXTEND (SP, AvFILLp (av) + 1);
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2051
2052 /* we have stolen the elements, so set length to zero and free */
2053 AvFILLp (av) = -1;
2054 av_undef (av);
2055
2056 PUTBACK;
2057 }
2058
2059 return 0;
2060}
2061
2062static void
2063slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 SV *cb;
2066
2067 if (items)
2068 cb = arg [0];
2069 else
2070 {
2071 struct coro *coro = SvSTATE_current;
2072
2073 if (!coro->rouse_cb)
2074 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2075
2076 cb = sv_2mortal (coro->rouse_cb);
2077 coro->rouse_cb = 0;
2078 }
2079
2080 if (!SvROK (cb)
2081 || SvTYPE (SvRV (cb)) != SVt_PVCV
2082 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2083 croak ("Coro::rouse_wait called with illegal callback argument,");
2084
2085 {
2086 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2087 SV *data = (SV *)GENSUB_ARG;
2088
2089 frame->data = (void *)data;
2090 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2091 frame->check = slf_check_rouse_wait;
2092 }
2093}
2094
2095static SV *
2096coro_new_rouse_cb (pTHX)
2097{
2098 HV *hv = (HV *)SvRV (coro_current);
2099 struct coro *coro = SvSTATE_hv (hv);
2100 SV *data = newRV_inc ((SV *)hv);
2101 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2102
2103 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2104 SvREFCNT_dec (data); /* magicext increases the refcount */
2105
2106 SvREFCNT_dec (coro->rouse_cb);
2107 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2108
2109 return cb;
2110}
2111
2112/*****************************************************************************/
2113/* schedule-like-function opcode (SLF) */
2114
2115static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2116static const CV *slf_cv;
2117static SV **slf_argv;
2118static int slf_argc, slf_arga; /* count, allocated */
2119static I32 slf_ax; /* top of stack, for restore */
2120
2121/* this restores the stack in the case we patched the entersub, to */
2122/* recreate the stack frame as perl will on following calls */
2123/* since entersub cleared the stack */
2124static OP *
2125pp_restore (pTHX)
2126{
2127 int i;
2128 SV **SP = PL_stack_base + slf_ax;
2129
2130 PUSHMARK (SP);
2131
2132 EXTEND (SP, slf_argc + 1);
2133
2134 for (i = 0; i < slf_argc; ++i)
2135 PUSHs (sv_2mortal (slf_argv [i]));
2136
2137 PUSHs ((SV *)CvGV (slf_cv));
2138
2139 RETURNOP (slf_restore.op_first);
2140}
2141
2142static void
2143slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2144{
2145 SV **arg = (SV **)slf_frame.data;
2146
2147 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2148}
2149
2150static void
2151slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 if (items != 2)
2154 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2155
2156 frame->prepare = slf_prepare_transfer;
2157 frame->check = slf_check_nop;
2158 frame->data = (void *)arg; /* let's hope it will stay valid */
2159}
2160
2161static void
2162slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 frame->prepare = prepare_schedule;
2165 frame->check = slf_check_nop;
2166}
2167
2168static void
2169slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2170{
2171 struct coro *next = (struct coro *)slf_frame.data;
2172
2173 SvREFCNT_inc_NN (next->hv);
2174 prepare_schedule_to (aTHX_ ta, next);
2175}
2176
2177static void
2178slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 if (!items)
2181 croak ("Coro::schedule_to expects a coroutine argument, caught");
2182
2183 frame->data = (void *)SvSTATE (arg [0]);
2184 frame->prepare = slf_prepare_schedule_to;
2185 frame->check = slf_check_nop;
2186}
2187
2188static void
2189slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 api_ready (aTHX_ SvRV (coro_current));
2192
2193 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2194}
2195
2196static void
2197slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede;
2200 frame->check = slf_check_nop;
2201}
2202
2203static void
2204slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 frame->prepare = prepare_cede_notself;
2207 frame->check = slf_check_nop;
2208}
2209
2210/*
2211 * these not obviously related functions are all rolled into one
2212 * function to increase chances that they all will call transfer with the same
2213 * stack offset
2214 * SLF stands for "schedule-like-function".
2215 */
2216static OP *
2217pp_slf (pTHX)
2218{
2219 I32 checkmark; /* mark SP to see how many elements check has pushed */
2220
2221 /* set up the slf frame, unless it has already been set-up */
2222 /* the latter happens when a new coro has been started */
2223 /* or when a new cctx was attached to an existing coroutine */
2224 if (expect_true (!slf_frame.prepare))
2225 {
2226 /* first iteration */
2227 dSP;
2228 SV **arg = PL_stack_base + TOPMARK + 1;
2229 int items = SP - arg; /* args without function object */
2230 SV *gv = *sp;
2231
2232 /* do a quick consistency check on the "function" object, and if it isn't */
2233 /* for us, divert to the real entersub */
2234 if (SvTYPE (gv) != SVt_PVGV
2235 || !GvCV (gv)
2236 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2237 return PL_ppaddr[OP_ENTERSUB](aTHX);
2238
2239 if (!(PL_op->op_flags & OPf_STACKED))
2240 {
2241 /* ampersand-form of call, use @_ instead of stack */
2242 AV *av = GvAV (PL_defgv);
2243 arg = AvARRAY (av);
2244 items = AvFILLp (av) + 1;
2245 }
2246
2247 /* now call the init function, which needs to set up slf_frame */
2248 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2249 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2250
2251 /* pop args */
2252 SP = PL_stack_base + POPMARK;
2253
2254 PUTBACK;
2255 }
2256
2257 /* now that we have a slf_frame, interpret it! */
2258 /* we use a callback system not to make the code needlessly */
2259 /* complicated, but so we can run multiple perl coros from one cctx */
2260
2261 do
2262 {
2263 struct coro_transfer_args ta;
2264
2265 slf_frame.prepare (aTHX_ &ta);
2266 TRANSFER (ta, 0);
2267
2268 checkmark = PL_stack_sp - PL_stack_base;
2269 }
2270 while (slf_frame.check (aTHX_ &slf_frame));
2271
2272 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2273
2274 /* exception handling */
2275 if (expect_false (CORO_THROW))
2276 {
2277 SV *exception = sv_2mortal (CORO_THROW);
2278
2279 CORO_THROW = 0;
2280 sv_setsv (ERRSV, exception);
2281 croak (0);
2282 }
2283
2284 /* return value handling - mostly like entersub */
2285 /* make sure we put something on the stack in scalar context */
2286 if (GIMME_V == G_SCALAR)
2287 {
2288 dSP;
2289 SV **bot = PL_stack_base + checkmark;
2290
2291 if (sp == bot) /* too few, push undef */
2292 bot [1] = &PL_sv_undef;
2293 else if (sp != bot + 1) /* too many, take last one */
2294 bot [1] = *sp;
2295
2296 SP = bot + 1;
2297
2298 PUTBACK;
2299 }
2300
2301 return NORMAL;
2302}
2303
2304static void
2305api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2306{
2307 int i;
2308 SV **arg = PL_stack_base + ax;
2309 int items = PL_stack_sp - arg + 1;
2310
2311 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2312
2313 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2314 && PL_op->op_ppaddr != pp_slf)
2315 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2316
2317 CvFLAGS (cv) |= CVf_SLF;
2318 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2319 slf_cv = cv;
2320
2321 /* we patch the op, and then re-run the whole call */
2322 /* we have to put the same argument on the stack for this to work */
2323 /* and this will be done by pp_restore */
2324 slf_restore.op_next = (OP *)&slf_restore;
2325 slf_restore.op_type = OP_CUSTOM;
2326 slf_restore.op_ppaddr = pp_restore;
2327 slf_restore.op_first = PL_op;
2328
2329 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2330
2331 if (PL_op->op_flags & OPf_STACKED)
2332 {
2333 if (items > slf_arga)
2334 {
2335 slf_arga = items;
2336 free (slf_argv);
2337 slf_argv = malloc (slf_arga * sizeof (SV *));
2338 }
2339
2340 slf_argc = items;
2341
2342 for (i = 0; i < items; ++i)
2343 slf_argv [i] = SvREFCNT_inc (arg [i]);
2344 }
2345 else
2346 slf_argc = 0;
2347
2348 PL_op->op_ppaddr = pp_slf;
2349 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2350
2351 PL_op = (OP *)&slf_restore;
2352}
2353
2354/*****************************************************************************/
2355/* dynamic wind */
2356
2357static void
2358on_enterleave_call (pTHX_ SV *cb)
2359{
2360 dSP;
2361
2362 PUSHSTACK;
2363
2364 PUSHMARK (SP);
2365 PUTBACK;
2366 call_sv (cb, G_VOID | G_DISCARD);
2367 SPAGAIN;
2368
2369 POPSTACK;
2370}
2371
2372static SV *
2373coro_avp_pop_and_free (pTHX_ AV **avp)
2374{
2375 AV *av = *avp;
2376 SV *res = av_pop (av);
2377
2378 if (AvFILLp (av) < 0)
2379 {
2380 *avp = 0;
2381 SvREFCNT_dec (av);
2382 }
2383
2384 return res;
2385}
2386
2387static void
2388coro_pop_on_enter (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2391 SvREFCNT_dec (cb);
2392}
2393
2394static void
2395coro_pop_on_leave (pTHX_ void *coro)
2396{
2397 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2398 on_enterleave_call (aTHX_ sv_2mortal (cb));
2399}
2400
2401/*****************************************************************************/
2402/* PerlIO::cede */
2403
2404typedef struct
2405{
2406 PerlIOBuf base;
2407 NV next, every;
2408} PerlIOCede;
2409
2410static IV
2411PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2412{
2413 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2414
2415 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2416 self->next = nvtime () + self->every;
2417
2418 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2419}
2420
2421static SV *
2422PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2423{
2424 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2425
2426 return newSVnv (self->every);
2427}
2428
2429static IV
2430PerlIOCede_flush (pTHX_ PerlIO *f)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433 double now = nvtime ();
2434
2435 if (now >= self->next)
2436 {
2437 api_cede (aTHX);
2438 self->next = now + self->every;
2439 }
2440
2441 return PerlIOBuf_flush (aTHX_ f);
2442}
2443
2444static PerlIO_funcs PerlIO_cede =
2445{
2446 sizeof(PerlIO_funcs),
2447 "cede",
2448 sizeof(PerlIOCede),
2449 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2450 PerlIOCede_pushed,
2451 PerlIOBuf_popped,
2452 PerlIOBuf_open,
2453 PerlIOBase_binmode,
2454 PerlIOCede_getarg,
2455 PerlIOBase_fileno,
2456 PerlIOBuf_dup,
2457 PerlIOBuf_read,
2458 PerlIOBuf_unread,
2459 PerlIOBuf_write,
2460 PerlIOBuf_seek,
2461 PerlIOBuf_tell,
2462 PerlIOBuf_close,
2463 PerlIOCede_flush,
2464 PerlIOBuf_fill,
2465 PerlIOBase_eof,
2466 PerlIOBase_error,
2467 PerlIOBase_clearerr,
2468 PerlIOBase_setlinebuf,
2469 PerlIOBuf_get_base,
2470 PerlIOBuf_bufsiz,
2471 PerlIOBuf_get_ptr,
2472 PerlIOBuf_get_cnt,
2473 PerlIOBuf_set_ptrcnt,
2474};
2475
2476/*****************************************************************************/
2477/* Coro::Semaphore & Coro::Signal */
2478
2479static SV *
2480coro_waitarray_new (pTHX_ int count)
2481{
2482 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2483 AV *av = newAV ();
2484 SV **ary;
2485
2486 /* unfortunately, building manually saves memory */
2487 Newx (ary, 2, SV *);
2488 AvALLOC (av) = ary;
2489#if PERL_VERSION_ATLEAST (5,10,0)
2490 AvARRAY (av) = ary;
2491#else
2492 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2493 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2494 SvPVX ((SV *)av) = (char *)ary;
2495#endif
2496 AvMAX (av) = 1;
2497 AvFILLp (av) = 0;
2498 ary [0] = newSViv (count);
2499
2500 return newRV_noinc ((SV *)av);
2501}
2502
2503/* semaphore */
2504
2505static void
2506coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2507{
2508 SV *count_sv = AvARRAY (av)[0];
2509 IV count = SvIVX (count_sv);
2510
2511 count += adjust;
2512 SvIVX (count_sv) = count;
2513
2514 /* now wake up as many waiters as are expected to lock */
2515 while (count > 0 && AvFILLp (av) > 0)
2516 {
2517 SV *cb;
2518
2519 /* swap first two elements so we can shift a waiter */
2520 AvARRAY (av)[0] = AvARRAY (av)[1];
2521 AvARRAY (av)[1] = count_sv;
2522 cb = av_shift (av);
2523
2524 if (SvOBJECT (cb))
2525 {
2526 api_ready (aTHX_ cb);
2527 --count;
2528 }
2529 else if (SvTYPE (cb) == SVt_PVCV)
2530 {
2531 dSP;
2532 PUSHMARK (SP);
2533 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2534 PUTBACK;
2535 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2536 }
2537
2538 SvREFCNT_dec (cb);
2539 }
2540}
2541
2542static void
2543coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2544{
2545 /* call $sem->adjust (0) to possibly wake up some other waiters */
2546 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2547}
2548
2549static int
2550slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2551{
2552 AV *av = (AV *)frame->data;
2553 SV *count_sv = AvARRAY (av)[0];
2554
2555 /* if we are about to throw, don't actually acquire the lock, just throw */
2556 if (CORO_THROW)
2557 return 0;
2558 else if (SvIVX (count_sv) > 0)
2559 {
2560 SvSTATE_current->on_destroy = 0;
2561
2562 if (acquire)
2563 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2564 else
2565 coro_semaphore_adjust (aTHX_ av, 0);
2566
2567 return 0;
2568 }
2569 else
2570 {
2571 int i;
2572 /* if we were woken up but can't down, we look through the whole */
2573 /* waiters list and only add us if we aren't in there already */
2574 /* this avoids some degenerate memory usage cases */
2575
2576 for (i = 1; i <= AvFILLp (av); ++i)
2577 if (AvARRAY (av)[i] == SvRV (coro_current))
2578 return 1;
2579
2580 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2581 return 1;
2582 }
2583}
2584
2585static int
2586slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2587{
2588 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2589}
2590
2591static int
2592slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2593{
2594 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2595}
2596
2597static void
2598slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 AV *av = (AV *)SvRV (arg [0]);
2601
2602 if (SvIVX (AvARRAY (av)[0]) > 0)
2603 {
2604 frame->data = (void *)av;
2605 frame->prepare = prepare_nop;
2606 }
2607 else
2608 {
2609 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2610
2611 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2612 frame->prepare = prepare_schedule;
2613
2614 /* to avoid race conditions when a woken-up coro gets terminated */
2615 /* we arrange for a temporary on_destroy that calls adjust (0) */
2616 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2617 }
2618}
2619
2620static void
2621slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_down;
2625}
2626
2627static void
2628slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2629{
2630 if (items >= 2)
2631 {
2632 /* callback form */
2633 AV *av = (AV *)SvRV (arg [0]);
2634 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2635
2636 av_push (av, SvREFCNT_inc_NN (cb_cv));
2637
2638 if (SvIVX (AvARRAY (av)[0]) > 0)
2639 coro_semaphore_adjust (aTHX_ av, 0);
2640
2641 frame->prepare = prepare_nop;
2642 frame->check = slf_check_nop;
2643 }
2644 else
2645 {
2646 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2647 frame->check = slf_check_semaphore_wait;
2648 }
2649}
2650
2651/* signal */
2652
2653static void
2654coro_signal_wake (pTHX_ AV *av, int count)
2655{
2656 SvIVX (AvARRAY (av)[0]) = 0;
2657
2658 /* now signal count waiters */
2659 while (count > 0 && AvFILLp (av) > 0)
2660 {
2661 SV *cb;
2662
2663 /* swap first two elements so we can shift a waiter */
2664 cb = AvARRAY (av)[0];
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = cb;
2667
2668 cb = av_shift (av);
2669
2670 if (SvTYPE (cb) == SVt_PVCV)
2671 {
2672 dSP;
2673 PUSHMARK (SP);
2674 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2675 PUTBACK;
2676 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2677 }
2678 else
2679 {
2680 api_ready (aTHX_ cb);
2681 sv_setiv (cb, 0); /* signal waiter */
2682 }
2683
2684 SvREFCNT_dec (cb);
2685
2686 --count;
2687 }
2688}
2689
2690static int
2691slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2692{
2693 /* if we are about to throw, also stop waiting */
2694 return SvROK ((SV *)frame->data) && !CORO_THROW;
2695}
2696
2697static void
2698slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2699{
2700 AV *av = (AV *)SvRV (arg [0]);
2701
2702 if (items >= 2)
2703 {
2704 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2705 av_push (av, SvREFCNT_inc_NN (cb_cv));
2706
2707 if (SvIVX (AvARRAY (av)[0]))
2708 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2709
2710 frame->prepare = prepare_nop;
2711 frame->check = slf_check_nop;
2712 }
2713 else if (SvIVX (AvARRAY (av)[0]))
2714 {
2715 SvIVX (AvARRAY (av)[0]) = 0;
2716 frame->prepare = prepare_nop;
2717 frame->check = slf_check_nop;
2718 }
2719 else
2720 {
2721 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2722
2723 av_push (av, waiter);
2724
2725 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2726 frame->prepare = prepare_schedule;
2727 frame->check = slf_check_signal_wait;
2728 }
2729}
2730
2731/*****************************************************************************/
2732/* Coro::AIO */
2733
2734#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2735
2736/* helper storage struct */
2737struct io_state
2738{
2739 int errorno;
2740 I32 laststype; /* U16 in 5.10.0 */
2741 int laststatval;
2742 Stat_t statcache;
2743};
2744
2745static void
2746coro_aio_callback (pTHX_ CV *cv)
2747{
2748 dXSARGS;
2749 AV *state = (AV *)GENSUB_ARG;
2750 SV *coro = av_pop (state);
2751 SV *data_sv = newSV (sizeof (struct io_state));
2752
2753 av_extend (state, items - 1);
2754
2755 sv_upgrade (data_sv, SVt_PV);
2756 SvCUR_set (data_sv, sizeof (struct io_state));
2757 SvPOK_only (data_sv);
2758
2759 {
2760 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2761
2762 data->errorno = errno;
2763 data->laststype = PL_laststype;
2764 data->laststatval = PL_laststatval;
2765 data->statcache = PL_statcache;
2766 }
2767
2768 /* now build the result vector out of all the parameters and the data_sv */
2769 {
2770 int i;
2771
2772 for (i = 0; i < items; ++i)
2773 av_push (state, SvREFCNT_inc_NN (ST (i)));
2774 }
2775
2776 av_push (state, data_sv);
2777
2778 api_ready (aTHX_ coro);
2779 SvREFCNT_dec (coro);
2780 SvREFCNT_dec ((AV *)state);
2781}
2782
2783static int
2784slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2785{
2786 AV *state = (AV *)frame->data;
2787
2788 /* if we are about to throw, return early */
2789 /* this does not cancel the aio request, but at least */
2790 /* it quickly returns */
2791 if (CORO_THROW)
2792 return 0;
2793
2794 /* one element that is an RV? repeat! */
2795 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2796 return 1;
2797
2798 /* restore status */
2799 {
2800 SV *data_sv = av_pop (state);
2801 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2802
2803 errno = data->errorno;
2804 PL_laststype = data->laststype;
2805 PL_laststatval = data->laststatval;
2806 PL_statcache = data->statcache;
2807
2808 SvREFCNT_dec (data_sv);
2809 }
2810
2811 /* push result values */
2812 {
2813 dSP;
2814 int i;
2815
2816 EXTEND (SP, AvFILLp (state) + 1);
2817 for (i = 0; i <= AvFILLp (state); ++i)
2818 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2819
2820 PUTBACK;
2821 }
2822
2823 return 0;
2824}
2825
2826static void
2827slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2828{
2829 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2830 SV *coro_hv = SvRV (coro_current);
2831 struct coro *coro = SvSTATE_hv (coro_hv);
2832
2833 /* put our coroutine id on the state arg */
2834 av_push (state, SvREFCNT_inc_NN (coro_hv));
2835
2836 /* first see whether we have a non-zero priority and set it as AIO prio */
2837 if (coro->prio)
2838 {
2839 dSP;
2840
2841 static SV *prio_cv;
2842 static SV *prio_sv;
2843
2844 if (expect_false (!prio_cv))
2845 {
2846 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2847 prio_sv = newSViv (0);
2848 }
2849
2850 PUSHMARK (SP);
2851 sv_setiv (prio_sv, coro->prio);
2852 XPUSHs (prio_sv);
2853
2854 PUTBACK;
2855 call_sv (prio_cv, G_VOID | G_DISCARD);
2856 }
2857
2858 /* now call the original request */
2859 {
2860 dSP;
2861 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2862 int i;
2863
2864 PUSHMARK (SP);
2865
2866 /* first push all args to the stack */
2867 EXTEND (SP, items + 1);
2868
2869 for (i = 0; i < items; ++i)
2870 PUSHs (arg [i]);
2871
2872 /* now push the callback closure */
2873 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2874
2875 /* now call the AIO function - we assume our request is uncancelable */
2876 PUTBACK;
2877 call_sv ((SV *)req, G_VOID | G_DISCARD);
2878 }
2879
2880 /* now that the requets is going, we loop toll we have a result */
2881 frame->data = (void *)state;
2882 frame->prepare = prepare_schedule;
2883 frame->check = slf_check_aio_req;
2884}
2885
2886static void
2887coro_aio_req_xs (pTHX_ CV *cv)
2888{
2889 dXSARGS;
2890
2891 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2892
2893 XSRETURN_EMPTY;
2894}
2895
2896/*****************************************************************************/
2897
2898#if CORO_CLONE
2899# include "clone.c"
2900#endif
2901
915MODULE = Coro::State PACKAGE = Coro::State 2902MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 2903
917PROTOTYPES: ENABLE 2904PROTOTYPES: DISABLE
918 2905
919BOOT: 2906BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 2907{
921#ifdef USE_ITHREADS 2908#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 2909# if CORO_PTHREAD
2910 coro_thx = PERL_GET_CONTEXT;
2911# endif
923#endif 2912#endif
924 BOOT_PAGESIZE; 2913 BOOT_PAGESIZE;
925 2914
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2915 cctx_current = cctx_new_empty ();
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2916
2917 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2918 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2919
2920 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2921 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2922 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2923
2924 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2925 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2926 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2927
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2928 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 2929
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2930 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2931 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2932 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2933 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934 2934
935 main_mainstack = PL_mainstack; 2935 main_mainstack = PL_mainstack;
2936 main_top_env = PL_top_env;
936 2937
2938 while (main_top_env->je_prev)
2939 main_top_env = main_top_env->je_prev;
2940
2941 {
2942 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2943
2944 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2945 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2946
2947 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2948 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2949 }
2950
937 coroapi.ver = CORO_API_VERSION; 2951 coroapi.ver = CORO_API_VERSION;
2952 coroapi.rev = CORO_API_REVISION;
2953
938 coroapi.transfer = api_transfer; 2954 coroapi.transfer = api_transfer;
939}
940 2955
941Coro::State 2956 coroapi.sv_state = SvSTATE_;
942_newprocess(args) 2957 coroapi.execute_slf = api_execute_slf;
943 SV * args 2958 coroapi.prepare_nop = prepare_nop;
944 PROTOTYPE: $ 2959 coroapi.prepare_schedule = prepare_schedule;
2960 coroapi.prepare_cede = prepare_cede;
2961 coroapi.prepare_cede_notself = prepare_cede_notself;
2962
2963 {
2964 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2965
2966 if (!svp) croak ("Time::HiRes is required");
2967 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2968
2969 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2970 }
2971
2972 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2973}
2974
2975SV *
2976new (char *klass, ...)
2977 ALIAS:
2978 Coro::new = 1
945 CODE: 2979 CODE:
946 Coro__State coro; 2980{
2981 struct coro *coro;
2982 MAGIC *mg;
2983 HV *hv;
2984 CV *cb;
2985 int i;
947 2986
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2987 if (items > 1)
949 croak ("Coro::State::_newprocess expects an arrayref");
950 2988 {
2989 cb = coro_sv_2cv (aTHX_ ST (1));
2990
2991 if (!ix)
2992 {
2993 if (CvISXSUB (cb))
2994 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2995
2996 if (!CvROOT (cb))
2997 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2998 }
2999 }
3000
951 Newz (0, coro, 1, struct coro); 3001 Newz (0, coro, 1, struct coro);
3002 coro->args = newAV ();
3003 coro->flags = CF_NEW;
952 3004
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 3005 if (coro_first) coro_first->prev = coro;
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3006 coro->next = coro_first;
955 /*coro->stack = 0;*/ 3007 coro_first = coro;
956 3008
957 /* same as JMPENV_BOOTSTRAP */ 3009 coro->hv = hv = newHV ();
958 /* we might be able to recycle start_env, but safe is safe */ 3010 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
959 /*Zero(&coro->start_env, 1, JMPENV);*/ 3011 mg->mg_flags |= MGf_DUP;
960 coro->start_env.je_ret = -1; 3012 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961 coro->start_env.je_mustcatch = TRUE;
962 3013
963 RETVAL = coro; 3014 if (items > 1)
3015 {
3016 av_extend (coro->args, items - 1 + ix - 1);
3017
3018 if (ix)
3019 {
3020 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3021 cb = cv_coro_run;
3022 }
3023
3024 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3025
3026 for (i = 2; i < items; i++)
3027 av_push (coro->args, newSVsv (ST (i)));
3028 }
3029}
964 OUTPUT: 3030 OUTPUT:
965 RETVAL 3031 RETVAL
966 3032
967void 3033void
968transfer(prev, next, flags) 3034transfer (...)
969 SV *prev
970 SV *next
971 int flags
972 PROTOTYPE: @ 3035 PROTOTYPE: $$
973 CODE: 3036 CODE:
974 PUTBACK; 3037 CORO_EXECUTE_SLF_XS (slf_init_transfer);
975 SV_CORO (next, "Coro::transfer"); 3038
976 SV_CORO (prev, "Coro::transfer"); 3039bool
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3040_destroy (SV *coro_sv)
978 SPAGAIN; 3041 CODE:
3042 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3043 OUTPUT:
3044 RETVAL
979 3045
980void 3046void
981DESTROY(coro)
982 Coro::State coro
983 CODE:
984
985 if (coro->mainstack && coro->mainstack != main_mainstack)
986 {
987 struct coro temp;
988
989 PUTBACK;
990 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991 LOAD (aTHX_ coro);
992 SPAGAIN;
993
994 destroy_stacks (aTHX);
995
996 LOAD ((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
998
999 coro->mainstack = 0;
1000 }
1001
1002 deallocate_stack (coro);
1003 SvREFCNT_dec (coro->args);
1004 Safefree (coro);
1005
1006void
1007_exit(code) 3047_exit (int code)
1008 int code
1009 PROTOTYPE: $ 3048 PROTOTYPE: $
1010 CODE: 3049 CODE:
1011 _exit (code); 3050 _exit (code);
1012 3051
1013MODULE = Coro::State PACKAGE = Coro::Cont 3052SV *
3053clone (Coro::State coro)
3054 CODE:
3055{
3056#if CORO_CLONE
3057 struct coro *ncoro = coro_clone (aTHX_ coro);
3058 MAGIC *mg;
3059 /* TODO: too much duplication */
3060 ncoro->hv = newHV ();
3061 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3062 mg->mg_flags |= MGf_DUP;
3063 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3064#else
3065 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3066#endif
3067}
3068 OUTPUT:
3069 RETVAL
1014 3070
1015# this is slightly dirty (should expose a c-level api) 3071int
3072cctx_stacksize (int new_stacksize = 0)
3073 PROTOTYPE: ;$
3074 CODE:
3075 RETVAL = cctx_stacksize;
3076 if (new_stacksize)
3077 {
3078 cctx_stacksize = new_stacksize;
3079 ++cctx_gen;
3080 }
3081 OUTPUT:
3082 RETVAL
3083
3084int
3085cctx_max_idle (int max_idle = 0)
3086 PROTOTYPE: ;$
3087 CODE:
3088 RETVAL = cctx_max_idle;
3089 if (max_idle > 1)
3090 cctx_max_idle = max_idle;
3091 OUTPUT:
3092 RETVAL
3093
3094int
3095cctx_count ()
3096 PROTOTYPE:
3097 CODE:
3098 RETVAL = cctx_count;
3099 OUTPUT:
3100 RETVAL
3101
3102int
3103cctx_idle ()
3104 PROTOTYPE:
3105 CODE:
3106 RETVAL = cctx_idle;
3107 OUTPUT:
3108 RETVAL
1016 3109
1017void 3110void
1018yield(...) 3111list ()
1019 PROTOTYPE: @ 3112 PROTOTYPE:
3113 PPCODE:
3114{
3115 struct coro *coro;
3116 for (coro = coro_first; coro; coro = coro->next)
3117 if (coro->hv)
3118 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3119}
3120
3121void
3122call (Coro::State coro, SV *coderef)
3123 ALIAS:
3124 eval = 1
3125 CODE:
3126{
3127 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3128 {
3129 struct coro *current = SvSTATE_current;
3130
3131 if (current != coro)
3132 {
3133 PUTBACK;
3134 save_perl (aTHX_ current);
3135 load_perl (aTHX_ coro);
3136 SPAGAIN;
3137 }
3138
3139 PUSHSTACK;
3140
3141 PUSHMARK (SP);
3142 PUTBACK;
3143
3144 if (ix)
3145 eval_sv (coderef, 0);
3146 else
3147 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3148
3149 POPSTACK;
3150 SPAGAIN;
3151
3152 if (current != coro)
3153 {
3154 PUTBACK;
3155 save_perl (aTHX_ coro);
3156 load_perl (aTHX_ current);
3157 SPAGAIN;
3158 }
3159 }
3160}
3161
3162SV *
3163is_ready (Coro::State coro)
3164 PROTOTYPE: $
3165 ALIAS:
3166 is_ready = CF_READY
3167 is_running = CF_RUNNING
3168 is_new = CF_NEW
3169 is_destroyed = CF_DESTROYED
3170 is_suspended = CF_SUSPENDED
3171 CODE:
3172 RETVAL = boolSV (coro->flags & ix);
3173 OUTPUT:
3174 RETVAL
3175
3176void
3177throw (Coro::State self, SV *throw = &PL_sv_undef)
3178 PROTOTYPE: $;$
1020 CODE: 3179 CODE:
1021 SV *yieldstack; 3180{
1022 SV *sv; 3181 struct coro *current = SvSTATE_current;
1023 AV *defav = GvAV (PL_defgv); 3182 SV **throwp = self == current ? &CORO_THROW : &self->except;
1024 struct coro *prev, *next;
1025
1026 yieldstack = *hv_fetch (
1027 (HV *)SvRV (GvSV (coro_current)),
1028 "yieldstack", sizeof ("yieldstack") - 1,
1029 0
1030 );
1031
1032 /* set up @_ -- ugly */
1033 av_clear (defav);
1034 av_fill (defav, items - 1);
1035 while (items--)
1036 av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038 sv = av_pop ((AV *)SvRV (yieldstack));
1039 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041 SvREFCNT_dec (sv); 3183 SvREFCNT_dec (*throwp);
1042 3184 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
1043 transfer (aTHX_ prev, next, 0);
1044
1045MODULE = Coro::State PACKAGE = Coro
1046
1047# this is slightly dirty (should expose a c-level api)
1048
1049BOOT:
1050{
1051 int i;
1052 HV *stash = gv_stashpv ("Coro", TRUE);
1053
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV ();
1066
1067 {
1068 SV *sv = perl_get_sv("Coro::API", 1);
1069
1070 coroapi.schedule = api_schedule;
1071 coroapi.cede = api_cede;
1072 coroapi.ready = api_ready;
1073 coroapi.nready = &coro_nready;
1074 coroapi.current = coro_current;
1075
1076 GCoroAPI = &coroapi;
1077 sv_setiv(sv, (IV)&coroapi);
1078 SvREADONLY_on(sv);
1079 }
1080} 3185}
1081
1082#if !PERL_MICRO
1083 3186
1084void 3187void
1085ready(self) 3188api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1086 SV * self 3189 PROTOTYPE: $;$
3190 C_ARGS: aTHX_ coro, flags
3191
3192SV *
3193has_cctx (Coro::State coro)
1087 PROTOTYPE: $ 3194 PROTOTYPE: $
1088 CODE: 3195 CODE:
1089 api_ready (self); 3196 /* maybe manage the running flag differently */
1090 3197 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1091#endif 3198 OUTPUT:
3199 RETVAL
1092 3200
1093int 3201int
3202is_traced (Coro::State coro)
3203 PROTOTYPE: $
3204 CODE:
3205 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3206 OUTPUT:
3207 RETVAL
3208
3209UV
3210rss (Coro::State coro)
3211 PROTOTYPE: $
3212 ALIAS:
3213 usecount = 1
3214 CODE:
3215 switch (ix)
3216 {
3217 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3218 case 1: RETVAL = coro->usecount; break;
3219 }
3220 OUTPUT:
3221 RETVAL
3222
3223void
3224force_cctx ()
3225 PROTOTYPE:
3226 CODE:
3227 cctx_current->idle_sp = 0;
3228
3229void
3230swap_defsv (Coro::State self)
3231 PROTOTYPE: $
3232 ALIAS:
3233 swap_defav = 1
3234 CODE:
3235 if (!self->slot)
3236 croak ("cannot swap state with coroutine that has no saved state,");
3237 else
3238 {
3239 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3240 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3241
3242 SV *tmp = *src; *src = *dst; *dst = tmp;
3243 }
3244
3245void
3246cancel (Coro::State self)
3247 CODE:
3248 coro_state_destroy (aTHX_ self);
3249 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3250
3251
3252MODULE = Coro::State PACKAGE = Coro
3253
3254BOOT:
3255{
3256 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3257 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3258 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3259 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3260 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3261 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3262 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3263 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3264 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3265
3266 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3267 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3268 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3269 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3270
3271 coro_stash = gv_stashpv ("Coro", TRUE);
3272
3273 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3274 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3275 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3276 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3277 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3278 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3279
3280 {
3281 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3282
3283 coroapi.schedule = api_schedule;
3284 coroapi.schedule_to = api_schedule_to;
3285 coroapi.cede = api_cede;
3286 coroapi.cede_notself = api_cede_notself;
3287 coroapi.ready = api_ready;
3288 coroapi.is_ready = api_is_ready;
3289 coroapi.nready = coro_nready;
3290 coroapi.current = coro_current;
3291
3292 /*GCoroAPI = &coroapi;*/
3293 sv_setiv (sv, (IV)&coroapi);
3294 SvREADONLY_on (sv);
3295 }
3296}
3297
3298void
3299terminate (...)
3300 CODE:
3301 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3302
3303void
3304schedule (...)
3305 CODE:
3306 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3307
3308void
3309schedule_to (...)
3310 CODE:
3311 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3312
3313void
3314cede_to (...)
3315 CODE:
3316 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3317
3318void
3319cede (...)
3320 CODE:
3321 CORO_EXECUTE_SLF_XS (slf_init_cede);
3322
3323void
3324cede_notself (...)
3325 CODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3327
3328void
3329_set_current (SV *current)
3330 PROTOTYPE: $
3331 CODE:
3332 SvREFCNT_dec (SvRV (coro_current));
3333 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3334
3335void
3336_set_readyhook (SV *hook)
3337 PROTOTYPE: $
3338 CODE:
3339 SvREFCNT_dec (coro_readyhook);
3340 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3341
3342int
3343prio (Coro::State coro, int newprio = 0)
3344 PROTOTYPE: $;$
3345 ALIAS:
3346 nice = 1
3347 CODE:
3348{
3349 RETVAL = coro->prio;
3350
3351 if (items > 1)
3352 {
3353 if (ix)
3354 newprio = coro->prio - newprio;
3355
3356 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3357 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3358
3359 coro->prio = newprio;
3360 }
3361}
3362 OUTPUT:
3363 RETVAL
3364
3365SV *
3366ready (SV *self)
3367 PROTOTYPE: $
3368 CODE:
3369 RETVAL = boolSV (api_ready (aTHX_ self));
3370 OUTPUT:
3371 RETVAL
3372
3373int
1094nready(...) 3374nready (...)
1095 PROTOTYPE: 3375 PROTOTYPE:
1096 CODE: 3376 CODE:
1097 RETVAL = coro_nready; 3377 RETVAL = coro_nready;
1098 OUTPUT: 3378 OUTPUT:
1099 RETVAL 3379 RETVAL
1100 3380
1101void 3381void
1102schedule(...) 3382suspend (Coro::State self)
1103 PROTOTYPE: 3383 PROTOTYPE: $
1104 CODE: 3384 CODE:
1105 api_schedule (); 3385 self->flags |= CF_SUSPENDED;
1106 3386
1107void 3387void
1108cede(...) 3388resume (Coro::State self)
1109 PROTOTYPE: 3389 PROTOTYPE: $
1110 CODE: 3390 CODE:
1111 api_cede (); 3391 self->flags &= ~CF_SUSPENDED;
1112 3392
1113# and these are hacks 3393void
3394_pool_handler (...)
3395 CODE:
3396 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3397
3398void
3399async_pool (SV *cv, ...)
3400 PROTOTYPE: &@
3401 PPCODE:
3402{
3403 HV *hv = (HV *)av_pop (av_async_pool);
3404 AV *av = newAV ();
3405 SV *cb = ST (0);
3406 int i;
3407
3408 av_extend (av, items - 2);
3409 for (i = 1; i < items; ++i)
3410 av_push (av, SvREFCNT_inc_NN (ST (i)));
3411
3412 if ((SV *)hv == &PL_sv_undef)
3413 {
3414 PUSHMARK (SP);
3415 EXTEND (SP, 2);
3416 PUSHs (sv_Coro);
3417 PUSHs ((SV *)cv_pool_handler);
3418 PUTBACK;
3419 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3420 SPAGAIN;
3421
3422 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3423 }
3424
3425 {
3426 struct coro *coro = SvSTATE_hv (hv);
3427
3428 assert (!coro->invoke_cb);
3429 assert (!coro->invoke_av);
3430 coro->invoke_cb = SvREFCNT_inc (cb);
3431 coro->invoke_av = av;
3432 }
3433
3434 api_ready (aTHX_ (SV *)hv);
3435
3436 if (GIMME_V != G_VOID)
3437 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3438 else
3439 SvREFCNT_dec (hv);
3440}
3441
1114SV * 3442SV *
1115_aio_get_state () 3443rouse_cb ()
3444 PROTOTYPE:
1116 CODE: 3445 CODE:
1117{ 3446 RETVAL = coro_new_rouse_cb (aTHX);
1118 struct {
1119 int errorno;
1120 int laststype;
1121 int laststatval;
1122 Stat_t statcache;
1123 } data;
1124
1125 data.errorno = errno;
1126 data.laststype = PL_laststype;
1127 data.laststatval = PL_laststatval;
1128 data.statcache = PL_statcache;
1129
1130 RETVAL = newSVpvn ((char *)&data, sizeof data);
1131}
1132 OUTPUT: 3447 OUTPUT:
1133 RETVAL 3448 RETVAL
1134 3449
1135void 3450void
1136_aio_set_state (char *data_) 3451rouse_wait (...)
3452 PROTOTYPE: ;$
3453 PPCODE:
3454 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3455
3456void
3457on_enter (SV *block)
3458 ALIAS:
3459 on_leave = 1
1137 PROTOTYPE: $ 3460 PROTOTYPE: &
1138 CODE: 3461 CODE:
1139{ 3462{
1140 struct { 3463 struct coro *coro = SvSTATE_current;
3464 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3465
3466 block = (SV *)coro_sv_2cv (aTHX_ block);
3467
3468 if (!*avp)
3469 *avp = newAV ();
3470
3471 av_push (*avp, SvREFCNT_inc (block));
3472
3473 if (!ix)
3474 on_enterleave_call (aTHX_ block);
3475
3476 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3477 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3478 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3479}
3480
3481
3482MODULE = Coro::State PACKAGE = PerlIO::cede
3483
3484BOOT:
3485 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3486
3487
3488MODULE = Coro::State PACKAGE = Coro::Semaphore
3489
3490SV *
3491new (SV *klass, SV *count = 0)
3492 CODE:
3493{
3494 int semcnt = 1;
3495
3496 if (count)
3497 {
3498 SvGETMAGIC (count);
3499
3500 if (SvOK (count))
3501 semcnt = SvIV (count);
3502 }
3503
3504 RETVAL = sv_bless (
3505 coro_waitarray_new (aTHX_ semcnt),
3506 GvSTASH (CvGV (cv))
3507 );
3508}
3509 OUTPUT:
3510 RETVAL
3511
3512# helper for Coro::Channel and others
3513SV *
3514_alloc (int count)
3515 CODE:
3516 RETVAL = coro_waitarray_new (aTHX_ count);
3517 OUTPUT:
3518 RETVAL
3519
3520SV *
3521count (SV *self)
3522 CODE:
3523 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3524 OUTPUT:
3525 RETVAL
3526
3527void
3528up (SV *self, int adjust = 1)
3529 ALIAS:
3530 adjust = 1
3531 CODE:
3532 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3533
3534void
3535down (...)
3536 CODE:
3537 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3538
3539void
3540wait (...)
3541 CODE:
3542 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3543
3544void
3545try (SV *self)
3546 PPCODE:
3547{
3548 AV *av = (AV *)SvRV (self);
3549 SV *count_sv = AvARRAY (av)[0];
3550 IV count = SvIVX (count_sv);
3551
3552 if (count > 0)
3553 {
3554 --count;
3555 SvIVX (count_sv) = count;
3556 XSRETURN_YES;
3557 }
3558 else
3559 XSRETURN_NO;
3560}
3561
3562void
3563waiters (SV *self)
3564 PPCODE:
3565{
3566 AV *av = (AV *)SvRV (self);
3567 int wcount = AvFILLp (av) + 1 - 1;
3568
3569 if (GIMME_V == G_SCALAR)
3570 XPUSHs (sv_2mortal (newSViv (wcount)));
3571 else
3572 {
1141 int errorno; 3573 int i;
1142 int laststype; 3574 EXTEND (SP, wcount);
1143 int laststatval; 3575 for (i = 1; i <= wcount; ++i)
1144 Stat_t statcache; 3576 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1145 } *data = (void *)data_; 3577 }
1146
1147 errno = data->errorno;
1148 PL_laststype = data->laststype;
1149 PL_laststatval = data->laststatval;
1150 PL_statcache = data->statcache;
1151} 3578}
3579
3580MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3581
3582void
3583_may_delete (SV *sem, int count, int extra_refs)
3584 PPCODE:
3585{
3586 AV *av = (AV *)SvRV (sem);
3587
3588 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3589 && AvFILLp (av) == 0 /* no waiters, just count */
3590 && SvIV (AvARRAY (av)[0]) == count)
3591 XSRETURN_YES;
3592
3593 XSRETURN_NO;
3594}
3595
3596MODULE = Coro::State PACKAGE = Coro::Signal
3597
3598SV *
3599new (SV *klass)
3600 CODE:
3601 RETVAL = sv_bless (
3602 coro_waitarray_new (aTHX_ 0),
3603 GvSTASH (CvGV (cv))
3604 );
3605 OUTPUT:
3606 RETVAL
3607
3608void
3609wait (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3612
3613void
3614broadcast (SV *self)
3615 CODE:
3616{
3617 AV *av = (AV *)SvRV (self);
3618 coro_signal_wake (aTHX_ av, AvFILLp (av));
3619}
3620
3621void
3622send (SV *self)
3623 CODE:
3624{
3625 AV *av = (AV *)SvRV (self);
3626
3627 if (AvFILLp (av))
3628 coro_signal_wake (aTHX_ av, 1);
3629 else
3630 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3631}
3632
3633IV
3634awaited (SV *self)
3635 CODE:
3636 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3637 OUTPUT:
3638 RETVAL
3639
3640
3641MODULE = Coro::State PACKAGE = Coro::AnyEvent
3642
3643BOOT:
3644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3645
3646void
3647_schedule (...)
3648 CODE:
3649{
3650 static int incede;
3651
3652 api_cede_notself (aTHX);
3653
3654 ++incede;
3655 while (coro_nready >= incede && api_cede (aTHX))
3656 ;
3657
3658 sv_setsv (sv_activity, &PL_sv_undef);
3659 if (coro_nready >= incede)
3660 {
3661 PUSHMARK (SP);
3662 PUTBACK;
3663 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3664 }
3665
3666 --incede;
3667}
3668
3669
3670MODULE = Coro::State PACKAGE = Coro::AIO
3671
3672void
3673_register (char *target, char *proto, SV *req)
3674 CODE:
3675{
3676 CV *req_cv = coro_sv_2cv (aTHX_ req);
3677 /* newXSproto doesn't return the CV on 5.8 */
3678 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3679 sv_setpv ((SV *)slf_cv, proto);
3680 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3681}
3682

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