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Comparing Coro/Coro/State.xs (file contents):
Revision 1.39 by root, Sun Nov 25 20:04:05 2001 UTC vs.
Revision 1.351 by root, Sat Jun 20 08:58:25 2009 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
30 137
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
32 139
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
34 154
35#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
36 157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
161# endif
162#endif
163
164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
171static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
175static HV *coro_state_stash, *coro_stash;
176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 177
39/* this is actually not only the c stack but also c registers etc... */ 178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
40typedef struct { 213typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 214{
42 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
45 coro_context cctx; 225 coro_context cctx;
46 226
47 void *sptr; 227 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
49} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
50 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 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 */
51struct coro { 262struct coro {
52 /* the optional C context */ 263 /* the C coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 264 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 265
57 /* optionally saved, might be zero */ 266 /* ready queue */
58 AV *defav; 267 struct coro *next_ready;
59 SV *defsv;
60 SV *errsv;
61 /* TODO: PL_pmop might be nice && effortless to save. */
62
63 /* saved global state not related to stacks */
64 U8 dowarn;
65 I32 in_eval;
66 268
67 /* the stacks and related info (callchain etc..) */ 269 /* state data */
68 PERL_SI *curstackinfo; 270 struct CoroSLF slf_frame; /* saved slf frame */
69 AV *curstack;
70 AV *mainstack; 271 AV *mainstack;
71 SV **stack_sp; 272 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV *top_env;
94 273
274 CV *startcv; /* the CV to execute */
95 /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
96 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;
97}; 300};
98 301
99typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
101 304
102static AV *main_mainstack; /* used to differentiate between $main and others */ 305/* the following variables are effectively part of the perl context */
103static HV *coro_state_stash; 306/* and get copied between struct coro and these variables */
104static SV *ucoro_state_sv; 307/* the mainr easonw e don't support windows process emulation */
105static U32 ucoro_state_hash; 308static struct CoroSLF slf_frame; /* the current slf frame */
106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
108
109/* mostly copied from op.c:cv_clone2 */
110STATIC AV *
111clone_padlist (AV *protopadlist)
112{
113 AV *av;
114 I32 ix;
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117 SV **pname = AvARRAY (protopad_name);
118 SV **ppad = AvARRAY (protopad);
119 I32 fname = AvFILLp (protopad_name);
120 I32 fpad = AvFILLp (protopad);
121 AV *newpadlist, *newpad_name, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131
132 newpadlist = newAV ();
133 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name);
135 av_store (newpadlist, 1, (SV *) newpad);
136
137 av = newAV (); /* will be @_ */
138 av_extend (av, 0);
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141
142 for (ix = fpad; ix > 0; ix--)
143 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
145 if (namesv && namesv != &PL_sv_undef)
146 {
147 char *name = SvPVX (namesv); /* XXX */
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 }
152 else
153 { /* our own lexical */
154 SV *sv;
155 if (*name == '&')
156 sv = SvREFCNT_inc (ppad[ix]);
157 else if (*name == '@')
158 sv = (SV *) newAV ();
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 }
167 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC void
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist);
220 }
221}
222#endif
223
224/* the next two functions merely cache the padlists */
225STATIC void
226get_padlist (CV *cv)
227{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230 if (he && AvFILLp ((AV *)*he) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 {
243 SvREFCNT_dec (*he);
244 *he = (SV *)newAV ();
245 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248}
249
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) load_state(aTHX_ (state));
280#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void
285load_state(pTHX_ Coro__State c)
286{
287 PL_dowarn = c->dowarn;
288 PL_in_eval = c->in_eval;
289
290 PL_curstackinfo = c->curstackinfo;
291 PL_curstack = c->curstack;
292 PL_mainstack = c->mainstack;
293 PL_stack_sp = c->stack_sp;
294 PL_op = c->op;
295 PL_curpad = c->curpad;
296 PL_stack_base = c->stack_base;
297 PL_stack_max = c->stack_max;
298 PL_tmps_stack = c->tmps_stack;
299 PL_tmps_floor = c->tmps_floor;
300 PL_tmps_ix = c->tmps_ix;
301 PL_tmps_max = c->tmps_max;
302 PL_markstack = c->markstack;
303 PL_markstack_ptr = c->markstack_ptr;
304 PL_markstack_max = c->markstack_max;
305 PL_scopestack = c->scopestack;
306 PL_scopestack_ix = c->scopestack_ix;
307 PL_scopestack_max = c->scopestack_max;
308 PL_savestack = c->savestack;
309 PL_savestack_ix = c->savestack_ix;
310 PL_savestack_max = c->savestack_max;
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314 PL_curcop = c->curcop;
315 PL_top_env = c->top_env;
316
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320
321 {
322 dSP;
323 CV *cv;
324
325 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs))
327 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist;
334#ifdef USE_THREADS
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 }
341
342 PUTBACK;
343 }
344}
345
346static void
347save_state(pTHX_ Coro__State c, int flags)
348{
349 {
350 dSP;
351 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo;
354
355 /*
356 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :(
358 */
359
360 PUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */
362 for (;;)
363 {
364 while (cxix >= 0)
365 {
366 PERL_CONTEXT *cx = &ccstk[cxix--];
367
368 if (CxTYPE(cx) == CXt_SUB)
369 {
370 CV *cv = cx->blk_sub.cv;
371 if (CvDEPTH(cv))
372 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv));
388 PUSHs ((SV *)cv);
389
390 get_padlist (cv); /* this is a monster */
391 }
392 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 }
400
401 if (top_si->si_type == PERLSI_MAIN)
402 break;
403
404 top_si = top_si->si_prev;
405 ccstk = top_si->si_cxstack;
406 cxix = top_si->si_cxix;
407 }
408
409 PUTBACK;
410 }
411
412 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
415
416 c->dowarn = PL_dowarn;
417 c->in_eval = PL_in_eval;
418
419 c->curstackinfo = PL_curstackinfo;
420 c->curstack = PL_curstack;
421 c->mainstack = PL_mainstack;
422 c->stack_sp = PL_stack_sp;
423 c->op = PL_op;
424 c->curpad = PL_curpad;
425 c->stack_base = PL_stack_base;
426 c->stack_max = PL_stack_max;
427 c->tmps_stack = PL_tmps_stack;
428 c->tmps_floor = PL_tmps_floor;
429 c->tmps_ix = PL_tmps_ix;
430 c->tmps_max = PL_tmps_max;
431 c->markstack = PL_markstack;
432 c->markstack_ptr = PL_markstack_ptr;
433 c->markstack_max = PL_markstack_max;
434 c->scopestack = PL_scopestack;
435 c->scopestack_ix = PL_scopestack_ix;
436 c->scopestack_max = PL_scopestack_max;
437 c->savestack = PL_savestack;
438 c->savestack_ix = PL_savestack_ix;
439 c->savestack_max = PL_savestack_max;
440 c->retstack = PL_retstack;
441 c->retstack_ix = PL_retstack_ix;
442 c->retstack_max = PL_retstack_max;
443 c->curcop = PL_curcop;
444 c->top_env = PL_top_env;
445}
446
447/*
448 * allocate various perl stacks. This is an exact copy
449 * of perl.c:init_stacks, except that it uses less memory
450 * on the assumption that coroutines do not usually need
451 * a lot of stackspace.
452 */
453STATIC void
454coro_init_stacks (pTHX)
455{
456 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
457 PL_curstackinfo->si_type = PERLSI_MAIN;
458 PL_curstack = PL_curstackinfo->si_stack;
459 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460
461 PL_stack_base = AvARRAY(PL_curstack);
462 PL_stack_sp = PL_stack_base;
463 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464
465 New(50,PL_tmps_stack,96,SV*);
466 PL_tmps_floor = -1;
467 PL_tmps_ix = -1;
468 PL_tmps_max = 96;
469
470 New(54,PL_markstack,16,I32);
471 PL_markstack_ptr = PL_markstack;
472 PL_markstack_max = PL_markstack + 16;
473
474 SET_MARK_OFFSET;
475
476 New(54,PL_scopestack,16,I32);
477 PL_scopestack_ix = 0;
478 PL_scopestack_max = 16;
479
480 New(54,PL_savestack,96,ANY);
481 PL_savestack_ix = 0;
482 PL_savestack_max = 96;
483
484 New(54,PL_retstack,8,OP*);
485 PL_retstack_ix = 0;
486 PL_retstack_max = 8;
487}
488
489/*
490 * destroy the stacks, the callchain etc...
491 * still there is a memleak of 128 bytes...
492 */
493STATIC void
494destroy_stacks(pTHX)
495{
496 if (!IN_DESTRUCT)
497 {
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505 }
506
507 while (PL_curstackinfo->si_next)
508 PL_curstackinfo = PL_curstackinfo->si_next;
509
510 while (PL_curstackinfo)
511 {
512 PERL_SI *p = PL_curstackinfo->si_prev;
513
514 {
515 dSP;
516 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517 PUTBACK; /* possibly superfluous */
518 }
519
520 if (!IN_DESTRUCT)
521 {
522 dounwind(-1);
523 SvREFCNT_dec(PL_curstackinfo->si_stack);
524 }
525
526 Safefree(PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo);
528 PL_curstackinfo = p;
529 }
530
531 Safefree(PL_tmps_stack);
532 Safefree(PL_markstack);
533 Safefree(PL_scopestack);
534 Safefree(PL_savestack);
535 Safefree(PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#if HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif
555 {
556 /*FIXME*//*D*//* reasonable stack size! */
557 stack->ssize = -4096 * sizeof (long);
558 New (0, stack->sptr, 4096, long);
559 }
560 }
561 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 {
578#ifdef HAVE_MMAP
579 if (stack->ssize > 0 && stack->sptr)
580 munmap (stack->sptr, stack->ssize);
581 else
582#else
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 }
587 else if (ctx->gencnt == stack->gencnt)
588 --stack->usecnt;
589 }
590}
591
592static void
593setup_coro (void *arg)
594{
595 /*
596 * emulate part of the perl startup here.
597 */
598 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601
602 coro_init_stacks (aTHX);
603 /*PL_curcop = 0;*/
604 /*PL_in_eval = PL_in_eval;*/ /* inherit */
605 SvREFCNT_dec (GvAV (PL_defgv));
606 GvAV (PL_defgv) = ctx->args;
607
608 SPAGAIN;
609
610 if (ctx->stack)
611 {
612 ctx->cursp = 0;
613
614 PUSHMARK(SP);
615 PUTBACK;
616 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
617
618 if (SvTRUE (ERRSV))
619 croak (NULL);
620 else
621 croak ("FATAL: CCTXT coroutine returned!");
622 }
623 else
624 {
625 UNOP myop;
626
627 PL_op = (OP *)&myop;
628
629 Zero(&myop, 1, UNOP);
630 myop.op_next = Nullop;
631 myop.op_flags = OPf_WANT_VOID;
632
633 PUSHMARK(SP);
634 XPUSHs (sub_init);
635 /*
636 * the next line is slightly wrong, as PL_op->op_next
637 * is actually being executed so we skip the first op.
638 * that doesn't matter, though, since it is only
639 * pp_nextstate and we never return...
640 * ah yes, and I don't care anyways ;)
641 */
642 PUTBACK;
643 PL_op = pp_entersub();
644 SPAGAIN;
645
646 ENTER; /* necessary e.g. for dounwind */
647 }
648}
649
650static void
651continue_coro (void *arg)
652{
653 /*
654 * this is a _very_ stripped down perl interpreter ;)
655 */
656 Coro__State ctx = (Coro__State)arg;
657 JMPENV coro_start_env;
658
659 /* same as JMPENV_BOOTSTRAP */
660 Zero(&coro_start_env, 1, JMPENV);
661 coro_start_env.je_ret = -1;
662 coro_start_env.je_mustcatch = TRUE;
663 PL_top_env = &coro_start_env;
664
665 ctx->cursp = 0;
666 PL_op = PL_op->op_next;
667 CALLRUNOPS(aTHX);
668
669 abort ();
670}
671
672STATIC void
673transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
674{
675 dSTACKLEVEL;
676 static struct coro *xnext;
677
678 if (prev != next)
679 {
680 xnext = next;
681
682 if (next->mainstack)
683 {
684 SAVE (prev, flags);
685 LOAD (next);
686
687 /* mark this state as in-use */
688 next->mainstack = 0;
689 next->tmps_ix = -2;
690
691 /* stacklevel changed? if yes, grab the stack for us! */
692 if (flags & TRANSFER_SAVE_CCTXT)
693 {
694 if (!prev->stack)
695 allocate_stack (prev, 0);
696 else if (prev->cursp != stacklevel
697 && prev->stack->usecnt > 1)
698 {
699 prev->gencnt = ++prev->stack->gencnt;
700 prev->stack->usecnt = 1;
701 }
702
703 /* has our stack been invalidated? */
704 if (next->stack && next->stack->gencnt != next->gencnt)
705 {
706 deallocate_stack (next);
707 allocate_stack (next, 1);
708 coro_create (&(next->stack->cctx),
709 continue_coro, (void *)next,
710 next->stack->sptr, labs (next->stack->ssize));
711 }
712
713 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714 /* don't add any code here */
715 }
716
717 }
718 else if (next->tmps_ix == -2)
719 croak ("tried to transfer to running coroutine");
720 else
721 {
722 SAVE (prev, -1); /* first get rid of the old state */
723
724 if (flags & TRANSFER_SAVE_CCTXT)
725 {
726 if (!prev->stack)
727 allocate_stack (prev, 0);
728
729 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
730 {
731 setup_coro (next);
732
733 prev->stack->refcnt++;
734 prev->stack->usecnt++;
735 next->stack = prev->stack;
736 next->gencnt = prev->gencnt;
737 }
738 else
739 {
740 allocate_stack (next, 1);
741 coro_create (&(next->stack->cctx),
742 setup_coro, (void *)next,
743 next->stack->sptr, labs (next->stack->ssize));
744 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
745 /* don't add any code here */
746 }
747 }
748 else
749 setup_coro (next);
750 }
751
752 /*
753 * xnext is now either prev or next, depending on wether
754 * we switched the c stack or not. that's why i use a global
755 * variable, that should become thread-specific at one point.
756 */
757 xnext->cursp = stacklevel;
758 }
759
760 if (coro_mortal)
761 {
762 SvREFCNT_dec (coro_mortal);
763 coro_mortal = 0;
764 }
765}
766
767#define SV_CORO(sv,func) \
768 do { \
769 if (SvROK (sv)) \
770 sv = SvRV (sv); \
771 \
772 if (SvTYPE(sv) == SVt_PVHV) \
773 { \
774 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
775 \
776 if (!he) \
777 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
778 \
779 (sv) = SvRV (HeVAL(he)); \
780 } \
781 \
782 /* must also be changed inside Coro::Cont::yield */ \
783 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
784 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
785 \
786 } while(0)
787
788#define SvSTATE(sv) (struct coro *)SvIV (sv)
789
790static void
791api_transfer(pTHX_ SV *prev, SV *next, int flags)
792{
793 SV_CORO (prev, "Coro::transfer");
794 SV_CORO (next, "Coro::transfer");
795
796 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
797}
798 309
799/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
800 311
801#define PRIO_MAX 3 312#define PRIO_MAX 3
802#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
804#define PRIO_LOW -1 315#define PRIO_LOW -1
805#define PRIO_IDLE -3 316#define PRIO_IDLE -3
806#define PRIO_MIN -4 317#define PRIO_MIN -4
807 318
808/* for Coro.pm */ 319/* for Coro.pm */
809static GV *coro_current, *coro_idle; 320static SV *coro_current;
810static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
811static 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
812 326
813static void 327/** lowlevel stuff **********************************************************/
814coro_enq (SV *sv)
815{
816 if (SvTYPE (sv) == SVt_PVHV)
817 {
818 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
819 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
820
821 prio = prio > PRIO_MAX ? PRIO_MAX
822 : prio < PRIO_MIN ? PRIO_MIN
823 : prio;
824
825 av_push (coro_ready [prio - PRIO_MIN], sv);
826 coro_nready++;
827
828 return;
829 }
830
831 croak ("Coro::ready tried to enqueue something that is not a coroutine");
832}
833 328
834static SV * 329static SV *
835coro_deq (int min_prio) 330coro_get_sv (pTHX_ const char *name, int create)
836{ 331{
837 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}
838 338
839 min_prio -= PRIO_MIN; 339static AV *
840 if (min_prio < 0) 340coro_get_av (pTHX_ const char *name, int create)
841 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}
842 348
843 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 349static HV *
844 if (av_len (coro_ready[prio]) >= 0) 350coro_get_hv (pTHX_ const char *name, int create)
845 { 351{
846 coro_nready--; 352#if PERL_VERSION_ATLEAST (5,10,0)
847 return av_shift (coro_ready[prio]); 353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
848 } 354 get_hv (name, create);
355#endif
356 return get_hv (name, create);
357}
849 358
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
850 return 0; 370 return cv;
851} 371}
852 372
853static void 373/*****************************************************************************/
854api_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)
855{ 394{
395 HV *stash;
396 MAGIC *mg;
397
856 if (SvROK (coro)) 398 if (SvROK (coro))
857 coro = SvRV (coro); 399 coro = SvRV (coro);
858 400
859 coro_enq (SvREFCNT_inc (coro)); 401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
860} 402 croak ("Coro::State object required");
861 403
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
862static void 475static int
863api_schedule (void) 476coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
864{ 477{
865 SV *prev, *next; 478 AV *padlist;
479 AV *av = (AV *)mg->mg_obj;
866 480
481 /* casting is fun. */
482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
483 free_padlist (aTHX_ padlist);
484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
487 return 0;
488}
489
490static MGVTBL coro_cv_vtbl = {
491 0, 0, 0, 0,
492 coro_cv_free
493};
494
495/* the next two functions merely cache the padlists */
496static void
497get_padlist (pTHX_ CV *cv)
498{
499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
501
502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
504 else
505 {
506#if CORO_PREFER_PERL_FUNCTIONS
507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
509 CV *cp = Perl_cv_clone (aTHX_ cv);
510 CvPADLIST (cv) = CvPADLIST (cp);
511 CvPADLIST (cp) = 0;
512 SvREFCNT_dec (cp);
513#else
514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
515#endif
516 }
517}
518
519static void
520put_padlist (pTHX_ CV *cv)
521{
522 MAGIC *mg = CORO_MAGIC_cv (cv);
523 AV *av;
524
525 if (expect_false (!mg))
526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
527
528 av = (AV *)mg->mg_obj;
529
530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
531 av_extend (av, AvFILLp (av) + 1);
532
533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
534}
535
536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
542load_perl (pTHX_ Coro__State c)
543{
544 perl_slots *slot = c->slot;
545 c->slot = 0;
546
547 PL_mainstack = c->mainstack;
548
549 GvSV (PL_defgv) = slot->defsv;
550 GvAV (PL_defgv) = slot->defav;
551 GvSV (PL_errgv) = slot->errsv;
552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
554
555 #define VAR(name,type) PL_ ## name = slot->name;
556 # include "state.h"
557 #undef VAR
558
559 {
560 dSP;
561
562 CV *cv;
563
564 /* now do the ugly restore mess */
565 while (expect_true (cv = (CV *)POPs))
566 {
567 put_padlist (aTHX_ cv); /* mark this padlist as available */
568 CvDEPTH (cv) = PTR2IV (POPs);
569 CvPADLIST (cv) = (AV *)POPs;
570 }
571
572 PUTBACK;
573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
585}
586
587static void
588save_perl (pTHX_ Coro__State c)
589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
601 {
602 dSP;
603 I32 cxix = cxstack_ix;
604 PERL_CONTEXT *ccstk = cxstack;
605 PERL_SI *top_si = PL_curstackinfo;
606
607 /*
608 * the worst thing you can imagine happens first - we have to save
609 * (and reinitialize) all cv's in the whole callchain :(
610 */
611
612 XPUSHs (Nullsv);
613 /* this loop was inspired by pp_caller */
614 for (;;)
615 {
616 while (expect_true (cxix >= 0))
617 {
618 PERL_CONTEXT *cx = &ccstk[cxix--];
619
620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
621 {
622 CV *cv = cx->blk_sub.cv;
623
624 if (expect_true (CvDEPTH (cv)))
625 {
626 EXTEND (SP, 3);
627 PUSHs ((SV *)CvPADLIST (cv));
628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
629 PUSHs ((SV *)cv);
630
631 CvDEPTH (cv) = 0;
632 get_padlist (aTHX_ cv);
633 }
634 }
635 }
636
637 if (expect_true (top_si->si_type == PERLSI_MAIN))
638 break;
639
640 top_si = top_si->si_prev;
641 ccstk = top_si->si_cxstack;
642 cxix = top_si->si_cxix;
643 }
644
645 PUTBACK;
646 }
647
648 /* allocate some space on the context stack for our purposes */
649 /* we manually unroll here, as usually 2 slots is enough */
650 if (SLOT_COUNT >= 1) CXINC;
651 if (SLOT_COUNT >= 2) CXINC;
652 if (SLOT_COUNT >= 3) CXINC;
653 {
654 int i;
655 for (i = 3; i < SLOT_COUNT; ++i)
656 CXINC;
657 }
658 cxstack_ix -= SLOT_COUNT; /* undo allocation */
659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
665 slot->defav = GvAV (PL_defgv);
666 slot->defsv = DEFSV;
667 slot->errsv = ERRSV;
668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675}
676
677/*
678 * allocate various perl stacks. This is almost an exact copy
679 * of perl.c:init_stacks, except that it uses less memory
680 * on the (sometimes correct) assumption that coroutines do
681 * not usually need a lot of stackspace.
682 */
683#if CORO_PREFER_PERL_FUNCTIONS
684# define coro_init_stacks(thx) init_stacks ()
685#else
686static void
687coro_init_stacks (pTHX)
688{
689 PL_curstackinfo = new_stackinfo(32, 8);
690 PL_curstackinfo->si_type = PERLSI_MAIN;
691 PL_curstack = PL_curstackinfo->si_stack;
692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
693
694 PL_stack_base = AvARRAY(PL_curstack);
695 PL_stack_sp = PL_stack_base;
696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
697
698 New(50,PL_tmps_stack,32,SV*);
699 PL_tmps_floor = -1;
700 PL_tmps_ix = -1;
701 PL_tmps_max = 32;
702
703 New(54,PL_markstack,16,I32);
704 PL_markstack_ptr = PL_markstack;
705 PL_markstack_max = PL_markstack + 16;
706
707#ifdef SET_MARK_OFFSET
708 SET_MARK_OFFSET;
709#endif
710
711 New(54,PL_scopestack,8,I32);
712 PL_scopestack_ix = 0;
713 PL_scopestack_max = 8;
714
715 New(54,PL_savestack,24,ANY);
716 PL_savestack_ix = 0;
717 PL_savestack_max = 24;
718
719#if !PERL_VERSION_ATLEAST (5,10,0)
720 New(54,PL_retstack,4,OP*);
721 PL_retstack_ix = 0;
722 PL_retstack_max = 4;
723#endif
724}
725#endif
726
727/*
728 * destroy the stacks, the callchain etc...
729 */
730static void
731coro_destruct_stacks (pTHX)
732{
733 while (PL_curstackinfo->si_next)
734 PL_curstackinfo = PL_curstackinfo->si_next;
735
736 while (PL_curstackinfo)
737 {
738 PERL_SI *p = PL_curstackinfo->si_prev;
739
740 if (!IN_DESTRUCT)
741 SvREFCNT_dec (PL_curstackinfo->si_stack);
742
743 Safefree (PL_curstackinfo->si_cxstack);
744 Safefree (PL_curstackinfo);
745 PL_curstackinfo = p;
746 }
747
748 Safefree (PL_tmps_stack);
749 Safefree (PL_markstack);
750 Safefree (PL_scopestack);
751 Safefree (PL_savestack);
752#if !PERL_VERSION_ATLEAST (5,10,0)
753 Safefree (PL_retstack);
754#endif
755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
766static size_t
767coro_rss (pTHX_ struct coro *coro)
768{
769 size_t rss = sizeof (*coro);
770
771 if (coro->mainstack)
772 {
773 if (coro->flags & CF_RUNNING)
774 {
775 #define SYM(sym) PL_ ## sym
776 CORO_RSS;
777 #undef SYM
778 }
779 else
780 {
781 #define SYM(sym) coro->slot->sym
782 CORO_RSS;
783 #undef SYM
784 }
785 }
786
787 return rss;
788}
789
790/** coroutine stack handling ************************************************/
791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
901coro_setup (pTHX_ struct coro *coro)
902{
903 /*
904 * emulate part of the perl startup here.
905 */
906 coro_init_stacks (aTHX);
907
908 PL_runops = RUNOPS_DEFAULT;
909 PL_curcop = &PL_compiling;
910 PL_in_eval = EVAL_NULL;
911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
915 PL_curpm = 0;
916 PL_curpad = 0;
917 PL_localizing = 0;
918 PL_dirty = 0;
919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
928
929 GvSV (PL_defgv) = newSV (0);
930 GvAV (PL_defgv) = coro->args; coro->args = 0;
931 GvSV (PL_errgv) = newSV (0);
932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
934 PL_rs = newSVsv (GvSV (irsgv));
935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
936
937 {
938 dSP;
939 UNOP myop;
940
941 Zero (&myop, 1, UNOP);
942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
944 myop.op_flags = OPf_WANT_VOID;
945
946 PUSHMARK (SP);
947 PUSHs ((SV *)coro->startcv);
948 PUTBACK;
949 PL_op = (OP *)&myop;
950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
951 }
952
953 /* this newly created coroutine might be run on an existing cctx which most
954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
971static void
972coro_unwind_stacks (pTHX)
973{
974 if (!IN_DESTRUCT)
975 {
976 /* restore all saved variables and stuff */
977 LEAVE_SCOPE (0);
978 assert (PL_tmps_floor == -1);
979
980 /* free all temporaries */
981 FREETMPS;
982 assert (PL_tmps_ix == -1);
983
984 /* unwind all extra stacks */
985 POPSTACK_TO (PL_mainstack);
986
987 /* unwind main stack */
988 dounwind (-1);
989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 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 coro_unwind_stacks (aTHX);
1005 coro_destruct_stacks (aTHX);
1006
1007 // now save some sv's to be free'd later
1008 svf [0] = GvSV (PL_defgv);
1009 svf [1] = (SV *)GvAV (PL_defgv);
1010 svf [2] = GvSV (PL_errgv);
1011 svf [3] = (SV *)PL_defoutgv;
1012 svf [4] = PL_rs;
1013 svf [5] = GvSV (irsgv);
1014 svf [6] = (SV *)GvHV (PL_hintgv);
1015 svf [7] = PL_diehook;
1016 svf [8] = PL_warnhook;
1017 assert (9 == sizeof (svf) / sizeof (*svf));
1018
1019 load_perl (aTHX_ current);
1020 }
1021
1022 {
1023 int i;
1024
1025 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1026 SvREFCNT_dec (svf [i]);
1027
1028 SvREFCNT_dec (coro->saved_deffh);
1029 SvREFCNT_dec (coro->rouse_cb);
1030 SvREFCNT_dec (coro->invoke_cb);
1031 SvREFCNT_dec (coro->invoke_av);
1032 }
1033}
1034
1035INLINE void
1036free_coro_mortal (pTHX)
1037{
1038 if (expect_true (coro_mortal))
1039 {
1040 SvREFCNT_dec (coro_mortal);
1041 coro_mortal = 0;
1042 }
1043}
1044
1045static int
1046runops_trace (pTHX)
1047{
1048 COP *oldcop = 0;
1049 int oldcxix = -2;
1050
1051 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1052 {
1053 PERL_ASYNC_CHECK ();
1054
1055 if (cctx_current->flags & CC_TRACE_ALL)
1056 {
1057 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1058 {
1059 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1060 SV **bot, **top;
1061 AV *av = newAV (); /* return values */
1062 SV **cb;
1063 dSP;
1064
1065 GV *gv = CvGV (cx->blk_sub.cv);
1066 SV *fullname = sv_2mortal (newSV (0));
1067 if (isGV (gv))
1068 gv_efullname3 (fullname, gv, 0);
1069
1070 bot = PL_stack_base + cx->blk_oldsp + 1;
1071 top = cx->blk_gimme == G_ARRAY ? SP + 1
1072 : cx->blk_gimme == G_SCALAR ? bot + 1
1073 : bot;
1074
1075 av_extend (av, top - bot);
1076 while (bot < top)
1077 av_push (av, SvREFCNT_inc_NN (*bot++));
1078
1079 PL_runops = RUNOPS_DEFAULT;
1080 ENTER;
1081 SAVETMPS;
1082 EXTEND (SP, 3);
1083 PUSHMARK (SP);
1084 PUSHs (&PL_sv_no);
1085 PUSHs (fullname);
1086 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1087 PUTBACK;
1088 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1089 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1090 SPAGAIN;
1091 FREETMPS;
1092 LEAVE;
1093 PL_runops = runops_trace;
1094 }
1095
1096 if (oldcop != PL_curcop)
1097 {
1098 oldcop = PL_curcop;
1099
1100 if (PL_curcop != &PL_compiling)
1101 {
1102 SV **cb;
1103
1104 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1105 {
1106 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1107
1108 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1109 {
1110 dSP;
1111 GV *gv = CvGV (cx->blk_sub.cv);
1112 SV *fullname = sv_2mortal (newSV (0));
1113
1114 if (isGV (gv))
1115 gv_efullname3 (fullname, gv, 0);
1116
1117 PL_runops = RUNOPS_DEFAULT;
1118 ENTER;
1119 SAVETMPS;
1120 EXTEND (SP, 3);
1121 PUSHMARK (SP);
1122 PUSHs (&PL_sv_yes);
1123 PUSHs (fullname);
1124 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1125 PUTBACK;
1126 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1127 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1128 SPAGAIN;
1129 FREETMPS;
1130 LEAVE;
1131 PL_runops = runops_trace;
1132 }
1133
1134 oldcxix = cxstack_ix;
1135 }
1136
1137 if (cctx_current->flags & CC_TRACE_LINE)
1138 {
1139 dSP;
1140
1141 PL_runops = RUNOPS_DEFAULT;
1142 ENTER;
1143 SAVETMPS;
1144 EXTEND (SP, 3);
1145 PL_runops = RUNOPS_DEFAULT;
1146 PUSHMARK (SP);
1147 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1148 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1149 PUTBACK;
1150 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1151 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1152 SPAGAIN;
1153 FREETMPS;
1154 LEAVE;
1155 PL_runops = runops_trace;
1156 }
1157 }
1158 }
1159 }
1160 }
1161
1162 TAINT_NOT;
1163 return 0;
1164}
1165
1166static struct CoroSLF cctx_ssl_frame;
1167
1168static void
1169slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1170{
1171 ta->prev = 0;
1172}
1173
1174static int
1175slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1176{
1177 *frame = cctx_ssl_frame;
1178
1179 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1180}
1181
1182/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1183static void NOINLINE
1184cctx_prepare (pTHX)
1185{
1186 PL_top_env = &PL_start_env;
1187
1188 if (cctx_current->flags & CC_TRACE)
1189 PL_runops = runops_trace;
1190
1191 /* we already must be executing an SLF op, there is no other valid way
1192 * that can lead to creation of a new cctx */
1193 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1194 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1195
1196 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1197 cctx_ssl_frame = slf_frame;
1198
1199 slf_frame.prepare = slf_prepare_set_stacklevel;
1200 slf_frame.check = slf_check_set_stacklevel;
1201}
1202
1203/* the tail of transfer: execute stuff we can only do after a transfer */
1204INLINE void
1205transfer_tail (pTHX)
1206{
1207 free_coro_mortal (aTHX);
1208}
1209
1210/*
1211 * this is a _very_ stripped down perl interpreter ;)
1212 */
1213static void
1214cctx_run (void *arg)
1215{
1216#ifdef USE_ITHREADS
1217# if CORO_PTHREAD
1218 PERL_SET_CONTEXT (coro_thx);
1219# endif
1220#endif
1221 {
1222 dTHX;
1223
1224 /* normally we would need to skip the entersub here */
1225 /* not doing so will re-execute it, which is exactly what we want */
1226 /* PL_nop = PL_nop->op_next */
1227
1228 /* inject a fake subroutine call to cctx_init */
1229 cctx_prepare (aTHX);
1230
1231 /* cctx_run is the alternative tail of transfer() */
1232 transfer_tail (aTHX);
1233
1234 /* somebody or something will hit me for both perl_run and PL_restartop */
1235 PL_restartop = PL_op;
1236 perl_run (PL_curinterp);
1237 /*
1238 * Unfortunately, there is no way to get at the return values of the
1239 * coro body here, as perl_run destroys these
1240 */
1241
1242 /*
1243 * If perl-run returns we assume exit() was being called or the coro
1244 * fell off the end, which seems to be the only valid (non-bug)
1245 * reason for perl_run to return. We try to exit by jumping to the
1246 * bootstrap-time "top" top_env, as we cannot restore the "main"
1247 * coroutine as Coro has no such concept.
1248 * This actually isn't valid with the pthread backend, but OSes requiring
1249 * that backend are too broken to do it in a standards-compliant way.
1250 */
1251 PL_top_env = main_top_env;
1252 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1253 }
1254}
1255
1256static coro_cctx *
1257cctx_new ()
1258{
1259 coro_cctx *cctx;
1260
1261 ++cctx_count;
1262 New (0, cctx, 1, coro_cctx);
1263
1264 cctx->gen = cctx_gen;
1265 cctx->flags = 0;
1266 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1267
1268 return cctx;
1269}
1270
1271/* create a new cctx only suitable as source */
1272static coro_cctx *
1273cctx_new_empty ()
1274{
1275 coro_cctx *cctx = cctx_new ();
1276
1277 cctx->sptr = 0;
1278 coro_create (&cctx->cctx, 0, 0, 0, 0);
1279
1280 return cctx;
1281}
1282
1283/* create a new cctx suitable as destination/running a perl interpreter */
1284static coro_cctx *
1285cctx_new_run ()
1286{
1287 coro_cctx *cctx = cctx_new ();
1288 void *stack_start;
1289 size_t stack_size;
1290
1291#if HAVE_MMAP
1292 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1293 /* mmap supposedly does allocate-on-write for us */
1294 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1295
1296 if (cctx->sptr != (void *)-1)
1297 {
1298 #if CORO_STACKGUARD
1299 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1300 #endif
1301 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1302 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1303 cctx->flags |= CC_MAPPED;
1304 }
1305 else
1306#endif
1307 {
1308 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1309 New (0, cctx->sptr, cctx_stacksize, long);
1310
1311 if (!cctx->sptr)
1312 {
1313 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1314 _exit (EXIT_FAILURE);
1315 }
1316
1317 stack_start = cctx->sptr;
1318 stack_size = cctx->ssize;
1319 }
1320
1321 #if CORO_USE_VALGRIND
1322 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1323 #endif
1324
1325 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1326
1327 return cctx;
1328}
1329
1330static void
1331cctx_destroy (coro_cctx *cctx)
1332{
1333 if (!cctx)
1334 return;
1335
1336 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1337
1338 --cctx_count;
1339 coro_destroy (&cctx->cctx);
1340
1341 /* coro_transfer creates new, empty cctx's */
1342 if (cctx->sptr)
1343 {
1344 #if CORO_USE_VALGRIND
1345 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1346 #endif
1347
1348#if HAVE_MMAP
1349 if (cctx->flags & CC_MAPPED)
1350 munmap (cctx->sptr, cctx->ssize);
1351 else
1352#endif
1353 Safefree (cctx->sptr);
1354 }
1355
1356 Safefree (cctx);
1357}
1358
1359/* wether this cctx should be destructed */
1360#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1361
1362static coro_cctx *
1363cctx_get (pTHX)
1364{
1365 while (expect_true (cctx_first))
1366 {
1367 coro_cctx *cctx = cctx_first;
1368 cctx_first = cctx->next;
1369 --cctx_idle;
1370
1371 if (expect_true (!CCTX_EXPIRED (cctx)))
1372 return cctx;
1373
1374 cctx_destroy (cctx);
1375 }
1376
1377 return cctx_new_run ();
1378}
1379
1380static void
1381cctx_put (coro_cctx *cctx)
1382{
1383 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1384
1385 /* free another cctx if overlimit */
1386 if (expect_false (cctx_idle >= cctx_max_idle))
1387 {
1388 coro_cctx *first = cctx_first;
1389 cctx_first = first->next;
1390 --cctx_idle;
1391
1392 cctx_destroy (first);
1393 }
1394
1395 ++cctx_idle;
1396 cctx->next = cctx_first;
1397 cctx_first = cctx;
1398}
1399
1400/** coroutine switching *****************************************************/
1401
1402static void
1403transfer_check (pTHX_ struct coro *prev, struct coro *next)
1404{
1405 /* TODO: throwing up here is considered harmful */
1406
1407 if (expect_true (prev != next))
1408 {
1409 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1410 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1411
1412 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1413 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1414
1415#if !PERL_VERSION_ATLEAST (5,10,0)
1416 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1417 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1418#endif
1419 }
1420}
1421
1422/* always use the TRANSFER macro */
1423static void NOINLINE /* noinline so we have a fixed stackframe */
1424transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1425{
1426 dSTACKLEVEL;
1427
1428 /* sometimes transfer is only called to set idle_sp */
1429 if (expect_false (!prev))
1430 {
1431 cctx_current->idle_sp = STACKLEVEL;
1432 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1433 }
1434 else if (expect_true (prev != next))
1435 {
1436 coro_cctx *cctx_prev;
1437
1438 if (expect_false (prev->flags & CF_NEW))
1439 {
1440 /* create a new empty/source context */
1441 prev->flags &= ~CF_NEW;
1442 prev->flags |= CF_RUNNING;
1443 }
1444
1445 prev->flags &= ~CF_RUNNING;
1446 next->flags |= CF_RUNNING;
1447
1448 /* first get rid of the old state */
1449 save_perl (aTHX_ prev);
1450
1451 if (expect_false (next->flags & CF_NEW))
1452 {
1453 /* need to start coroutine */
1454 next->flags &= ~CF_NEW;
1455 /* setup coroutine call */
1456 coro_setup (aTHX_ next);
1457 }
1458 else
1459 load_perl (aTHX_ next);
1460
1461 /* possibly untie and reuse the cctx */
1462 if (expect_true (
1463 cctx_current->idle_sp == STACKLEVEL
1464 && !(cctx_current->flags & CC_TRACE)
1465 && !force_cctx
1466 ))
1467 {
1468 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1469 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1470
1471 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1472 /* without this the next cctx_get might destroy the running cctx while still in use */
1473 if (expect_false (CCTX_EXPIRED (cctx_current)))
1474 if (expect_true (!next->cctx))
1475 next->cctx = cctx_get (aTHX);
1476
1477 cctx_put (cctx_current);
1478 }
1479 else
1480 prev->cctx = cctx_current;
1481
1482 ++next->usecount;
1483
1484 cctx_prev = cctx_current;
1485 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1486
1487 next->cctx = 0;
1488
1489 if (expect_false (cctx_prev != cctx_current))
1490 {
1491 cctx_prev->top_env = PL_top_env;
1492 PL_top_env = cctx_current->top_env;
1493 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1494 }
1495
1496 transfer_tail (aTHX);
1497 }
1498}
1499
1500#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1501#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1502
1503/** high level stuff ********************************************************/
1504
1505static int
1506coro_state_destroy (pTHX_ struct coro *coro)
1507{
1508 if (coro->flags & CF_DESTROYED)
1509 return 0;
1510
1511 if (coro->on_destroy && !PL_dirty)
1512 coro->on_destroy (aTHX_ coro);
1513
1514 coro->flags |= CF_DESTROYED;
1515
1516 if (coro->flags & CF_READY)
1517 {
1518 /* reduce nready, as destroying a ready coro effectively unreadies it */
1519 /* alternative: look through all ready queues and remove the coro */
1520 --coro_nready;
1521 }
1522 else
1523 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1524
1525 if (coro->mainstack
1526 && coro->mainstack != main_mainstack
1527 && coro->slot
1528 && !PL_dirty)
1529 coro_destruct_perl (aTHX_ coro);
1530
1531 cctx_destroy (coro->cctx);
1532 SvREFCNT_dec (coro->startcv);
1533 SvREFCNT_dec (coro->args);
1534 SvREFCNT_dec (CORO_THROW);
1535
1536 if (coro->next) coro->next->prev = coro->prev;
1537 if (coro->prev) coro->prev->next = coro->next;
1538 if (coro == coro_first) coro_first = coro->next;
1539
1540 return 1;
1541}
1542
1543static int
1544coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1545{
1546 struct coro *coro = (struct coro *)mg->mg_ptr;
1547 mg->mg_ptr = 0;
1548
1549 coro->hv = 0;
1550
1551 if (--coro->refcnt < 0)
1552 {
1553 coro_state_destroy (aTHX_ coro);
1554 Safefree (coro);
1555 }
1556
1557 return 0;
1558}
1559
1560static int
1561coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1562{
1563 struct coro *coro = (struct coro *)mg->mg_ptr;
1564
1565 ++coro->refcnt;
1566
1567 return 0;
1568}
1569
1570static MGVTBL coro_state_vtbl = {
1571 0, 0, 0, 0,
1572 coro_state_free,
1573 0,
1574#ifdef MGf_DUP
1575 coro_state_dup,
1576#else
1577# define MGf_DUP 0
1578#endif
1579};
1580
1581static void
1582prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1583{
1584 ta->prev = SvSTATE (prev_sv);
1585 ta->next = SvSTATE (next_sv);
1586 TRANSFER_CHECK (*ta);
1587}
1588
1589static void
1590api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1591{
1592 struct coro_transfer_args ta;
1593
1594 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1595 TRANSFER (ta, 1);
1596}
1597
1598/*****************************************************************************/
1599/* gensub: simple closure generation utility */
1600
1601#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1602
1603/* create a closure from XS, returns a code reference */
1604/* the arg can be accessed via GENSUB_ARG from the callback */
1605/* the callback must use dXSARGS/XSRETURN */
1606static SV *
1607gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1608{
1609 CV *cv = (CV *)newSV (0);
1610
1611 sv_upgrade ((SV *)cv, SVt_PVCV);
1612
1613 CvANON_on (cv);
1614 CvISXSUB_on (cv);
1615 CvXSUB (cv) = xsub;
1616 GENSUB_ARG = arg;
1617
1618 return newRV_noinc ((SV *)cv);
1619}
1620
1621/** Coro ********************************************************************/
1622
1623INLINE void
1624coro_enq (pTHX_ struct coro *coro)
1625{
1626 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1627
1628 SvREFCNT_inc_NN (coro->hv);
1629
1630 coro->next_ready = 0;
1631 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1632 ready [1] = coro;
1633}
1634
1635INLINE struct coro *
1636coro_deq (pTHX)
1637{
1638 int prio;
1639
1640 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1641 {
1642 struct coro **ready = coro_ready [prio];
1643
1644 if (ready [0])
1645 {
1646 struct coro *coro = ready [0];
1647 ready [0] = coro->next_ready;
1648 return coro;
1649 }
1650 }
1651
1652 return 0;
1653}
1654
1655static int
1656api_ready (pTHX_ SV *coro_sv)
1657{
1658 struct coro *coro;
1659 SV *sv_hook;
1660 void (*xs_hook)(void);
1661
1662 coro = SvSTATE (coro_sv);
1663
1664 if (coro->flags & CF_READY)
1665 return 0;
1666
1667 coro->flags |= CF_READY;
1668
1669 sv_hook = coro_nready ? 0 : coro_readyhook;
1670 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1671
1672 coro_enq (aTHX_ coro);
1673 ++coro_nready;
1674
1675 if (sv_hook)
1676 {
1677 dSP;
1678
1679 ENTER;
1680 SAVETMPS;
1681
1682 PUSHMARK (SP);
1683 PUTBACK;
1684 call_sv (sv_hook, G_VOID | G_DISCARD);
1685
1686 FREETMPS;
1687 LEAVE;
1688 }
1689
1690 if (xs_hook)
1691 xs_hook ();
1692
1693 return 1;
1694}
1695
1696static int
1697api_is_ready (pTHX_ SV *coro_sv)
1698{
1699 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1700}
1701
1702/* expects to own a reference to next->hv */
1703INLINE void
1704prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1705{
867 prev = SvRV (GvSV (coro_current)); 1706 SV *prev_sv = SvRV (coro_current);
868 next = coro_deq (PRIO_MIN);
869 1707
870 if (!next) 1708 ta->prev = SvSTATE_hv (prev_sv);
871 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1709 ta->next = next;
872 1710
1711 TRANSFER_CHECK (*ta);
1712
1713 SvRV_set (coro_current, (SV *)next->hv);
1714
1715 free_coro_mortal (aTHX);
873 coro_mortal = prev; 1716 coro_mortal = prev_sv;
874 SV_CORO (prev, "Coro::schedule");
875
876 SvRV (GvSV (coro_current)) = next;
877
878 SV_CORO (next, "Coro::schedule");
879
880 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
882} 1717}
883 1718
884static void 1719static void
885api_cede (void) 1720prepare_schedule (pTHX_ struct coro_transfer_args *ta)
886{ 1721{
887 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1722 for (;;)
1723 {
1724 struct coro *next = coro_deq (aTHX);
888 1725
1726 if (expect_true (next))
1727 {
1728 /* cannot transfer to destroyed coros, skip and look for next */
1729 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1730 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1731 else
1732 {
1733 next->flags &= ~CF_READY;
1734 --coro_nready;
1735
1736 prepare_schedule_to (aTHX_ ta, next);
1737 break;
1738 }
1739 }
1740 else
1741 {
1742 /* nothing to schedule: call the idle handler */
1743 if (SvROK (sv_idle)
1744 && SvOBJECT (SvRV (sv_idle)))
1745 {
1746 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1747 api_ready (aTHX_ SvRV (sv_idle));
1748 --coro_nready;
1749 }
1750 else
1751 {
1752 dSP;
1753
1754 ENTER;
1755 SAVETMPS;
1756
1757 PUSHMARK (SP);
1758 PUTBACK;
1759 call_sv (sv_idle, G_VOID | G_DISCARD);
1760
1761 FREETMPS;
1762 LEAVE;
1763 }
1764 }
1765 }
1766}
1767
1768INLINE void
1769prepare_cede (pTHX_ struct coro_transfer_args *ta)
1770{
1771 api_ready (aTHX_ coro_current);
1772 prepare_schedule (aTHX_ ta);
1773}
1774
1775INLINE void
1776prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1777{
1778 SV *prev = SvRV (coro_current);
1779
1780 if (coro_nready)
1781 {
1782 prepare_schedule (aTHX_ ta);
1783 api_ready (aTHX_ prev);
1784 }
1785 else
1786 prepare_nop (aTHX_ ta);
1787}
1788
1789static void
889 api_schedule (); 1790api_schedule (pTHX)
890} 1791{
1792 struct coro_transfer_args ta;
891 1793
1794 prepare_schedule (aTHX_ &ta);
1795 TRANSFER (ta, 1);
1796}
1797
1798static void
1799api_schedule_to (pTHX_ SV *coro_sv)
1800{
1801 struct coro_transfer_args ta;
1802 struct coro *next = SvSTATE (coro_sv);
1803
1804 SvREFCNT_inc_NN (coro_sv);
1805 prepare_schedule_to (aTHX_ &ta, next);
1806}
1807
1808static int
1809api_cede (pTHX)
1810{
1811 struct coro_transfer_args ta;
1812
1813 prepare_cede (aTHX_ &ta);
1814
1815 if (expect_true (ta.prev != ta.next))
1816 {
1817 TRANSFER (ta, 1);
1818 return 1;
1819 }
1820 else
1821 return 0;
1822}
1823
1824static int
1825api_cede_notself (pTHX)
1826{
1827 if (coro_nready)
1828 {
1829 struct coro_transfer_args ta;
1830
1831 prepare_cede_notself (aTHX_ &ta);
1832 TRANSFER (ta, 1);
1833 return 1;
1834 }
1835 else
1836 return 0;
1837}
1838
1839static void
1840api_trace (pTHX_ SV *coro_sv, int flags)
1841{
1842 struct coro *coro = SvSTATE (coro_sv);
1843
1844 if (coro->flags & CF_RUNNING)
1845 croak ("cannot enable tracing on a running coroutine, caught");
1846
1847 if (flags & CC_TRACE)
1848 {
1849 if (!coro->cctx)
1850 coro->cctx = cctx_new_run ();
1851 else if (!(coro->cctx->flags & CC_TRACE))
1852 croak ("cannot enable tracing on coroutine with custom stack, caught");
1853
1854 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1855 }
1856 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1857 {
1858 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1859
1860 if (coro->flags & CF_RUNNING)
1861 PL_runops = RUNOPS_DEFAULT;
1862 else
1863 coro->slot->runops = RUNOPS_DEFAULT;
1864 }
1865}
1866
1867static void
1868coro_call_on_destroy (pTHX_ struct coro *coro)
1869{
1870 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1871 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1872
1873 if (on_destroyp)
1874 {
1875 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1876
1877 while (AvFILLp (on_destroy) >= 0)
1878 {
1879 dSP; /* don't disturb outer sp */
1880 SV *cb = av_pop (on_destroy);
1881
1882 PUSHMARK (SP);
1883
1884 if (statusp)
1885 {
1886 int i;
1887 AV *status = (AV *)SvRV (*statusp);
1888 EXTEND (SP, AvFILLp (status) + 1);
1889
1890 for (i = 0; i <= AvFILLp (status); ++i)
1891 PUSHs (AvARRAY (status)[i]);
1892 }
1893
1894 PUTBACK;
1895 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1896 }
1897 }
1898}
1899
1900static void
1901slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1902{
1903 int i;
1904 HV *hv = (HV *)SvRV (coro_current);
1905 AV *av = newAV ();
1906
1907 av_extend (av, items - 1);
1908 for (i = 0; i < items; ++i)
1909 av_push (av, SvREFCNT_inc_NN (arg [i]));
1910
1911 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1912
1913 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1914 api_ready (aTHX_ sv_manager);
1915
1916 frame->prepare = prepare_schedule;
1917 frame->check = slf_check_repeat;
1918
1919 /* as a minor optimisation, we could unwind all stacks here */
1920 /* but that puts extra pressure on pp_slf, and is not worth much */
1921 /*coro_unwind_stacks (aTHX);*/
1922}
1923
1924/*****************************************************************************/
1925/* async pool handler */
1926
1927static int
1928slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1929{
1930 HV *hv = (HV *)SvRV (coro_current);
1931 struct coro *coro = (struct coro *)frame->data;
1932
1933 if (!coro->invoke_cb)
1934 return 1; /* loop till we have invoke */
1935 else
1936 {
1937 hv_store (hv, "desc", sizeof ("desc") - 1,
1938 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1939
1940 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1941
1942 {
1943 dSP;
1944 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1945 PUTBACK;
1946 }
1947
1948 SvREFCNT_dec (GvAV (PL_defgv));
1949 GvAV (PL_defgv) = coro->invoke_av;
1950 coro->invoke_av = 0;
1951
1952 return 0;
1953 }
1954}
1955
1956static void
1957slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1958{
1959 HV *hv = (HV *)SvRV (coro_current);
1960 struct coro *coro = SvSTATE_hv ((SV *)hv);
1961
1962 if (expect_true (coro->saved_deffh))
1963 {
1964 /* subsequent iteration */
1965 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1966 coro->saved_deffh = 0;
1967
1968 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1969 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1970 {
1971 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1972 coro->invoke_av = newAV ();
1973
1974 frame->prepare = prepare_nop;
1975 }
1976 else
1977 {
1978 av_clear (GvAV (PL_defgv));
1979 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1980
1981 coro->prio = 0;
1982
1983 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1984 api_trace (aTHX_ coro_current, 0);
1985
1986 frame->prepare = prepare_schedule;
1987 av_push (av_async_pool, SvREFCNT_inc (hv));
1988 }
1989 }
1990 else
1991 {
1992 /* first iteration, simply fall through */
1993 frame->prepare = prepare_nop;
1994 }
1995
1996 frame->check = slf_check_pool_handler;
1997 frame->data = (void *)coro;
1998}
1999
2000/*****************************************************************************/
2001/* rouse callback */
2002
2003#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2004
2005static void
2006coro_rouse_callback (pTHX_ CV *cv)
2007{
2008 dXSARGS;
2009 SV *data = (SV *)GENSUB_ARG;
2010
2011 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2012 {
2013 /* first call, set args */
2014 SV *coro = SvRV (data);
2015 AV *av = newAV ();
2016
2017 SvRV_set (data, (SV *)av);
2018
2019 /* better take a full copy of the arguments */
2020 while (items--)
2021 av_store (av, items, newSVsv (ST (items)));
2022
2023 api_ready (aTHX_ coro);
2024 SvREFCNT_dec (coro);
2025 }
2026
2027 XSRETURN_EMPTY;
2028}
2029
2030static int
2031slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2032{
2033 SV *data = (SV *)frame->data;
2034
2035 if (CORO_THROW)
2036 return 0;
2037
2038 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2039 return 1;
2040
2041 /* now push all results on the stack */
2042 {
2043 dSP;
2044 AV *av = (AV *)SvRV (data);
2045 int i;
2046
2047 EXTEND (SP, AvFILLp (av) + 1);
2048 for (i = 0; i <= AvFILLp (av); ++i)
2049 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2050
2051 /* we have stolen the elements, so set length to zero and free */
2052 AvFILLp (av) = -1;
2053 av_undef (av);
2054
2055 PUTBACK;
2056 }
2057
2058 return 0;
2059}
2060
2061static void
2062slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2063{
2064 SV *cb;
2065
2066 if (items)
2067 cb = arg [0];
2068 else
2069 {
2070 struct coro *coro = SvSTATE_current;
2071
2072 if (!coro->rouse_cb)
2073 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2074
2075 cb = sv_2mortal (coro->rouse_cb);
2076 coro->rouse_cb = 0;
2077 }
2078
2079 if (!SvROK (cb)
2080 || SvTYPE (SvRV (cb)) != SVt_PVCV
2081 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2082 croak ("Coro::rouse_wait called with illegal callback argument,");
2083
2084 {
2085 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2086 SV *data = (SV *)GENSUB_ARG;
2087
2088 frame->data = (void *)data;
2089 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2090 frame->check = slf_check_rouse_wait;
2091 }
2092}
2093
2094static SV *
2095coro_new_rouse_cb (pTHX)
2096{
2097 HV *hv = (HV *)SvRV (coro_current);
2098 struct coro *coro = SvSTATE_hv (hv);
2099 SV *data = newRV_inc ((SV *)hv);
2100 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2101
2102 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2103 SvREFCNT_dec (data); /* magicext increases the refcount */
2104
2105 SvREFCNT_dec (coro->rouse_cb);
2106 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2107
2108 return cb;
2109}
2110
2111/*****************************************************************************/
2112/* schedule-like-function opcode (SLF) */
2113
2114static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2115static const CV *slf_cv;
2116static SV **slf_argv;
2117static int slf_argc, slf_arga; /* count, allocated */
2118static I32 slf_ax; /* top of stack, for restore */
2119
2120/* this restores the stack in the case we patched the entersub, to */
2121/* recreate the stack frame as perl will on following calls */
2122/* since entersub cleared the stack */
2123static OP *
2124pp_restore (pTHX)
2125{
2126 int i;
2127 SV **SP = PL_stack_base + slf_ax;
2128
2129 PUSHMARK (SP);
2130
2131 EXTEND (SP, slf_argc + 1);
2132
2133 for (i = 0; i < slf_argc; ++i)
2134 PUSHs (sv_2mortal (slf_argv [i]));
2135
2136 PUSHs ((SV *)CvGV (slf_cv));
2137
2138 RETURNOP (slf_restore.op_first);
2139}
2140
2141static void
2142slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2143{
2144 SV **arg = (SV **)slf_frame.data;
2145
2146 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2147}
2148
2149static void
2150slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2151{
2152 if (items != 2)
2153 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2154
2155 frame->prepare = slf_prepare_transfer;
2156 frame->check = slf_check_nop;
2157 frame->data = (void *)arg; /* let's hope it will stay valid */
2158}
2159
2160static void
2161slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2162{
2163 frame->prepare = prepare_schedule;
2164 frame->check = slf_check_nop;
2165}
2166
2167static void
2168slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2169{
2170 struct coro *next = (struct coro *)slf_frame.data;
2171
2172 SvREFCNT_inc_NN (next->hv);
2173 prepare_schedule_to (aTHX_ ta, next);
2174}
2175
2176static void
2177slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2178{
2179 if (!items)
2180 croak ("Coro::schedule_to expects a coroutine argument, caught");
2181
2182 frame->data = (void *)SvSTATE (arg [0]);
2183 frame->prepare = slf_prepare_schedule_to;
2184 frame->check = slf_check_nop;
2185}
2186
2187static void
2188slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2189{
2190 api_ready (aTHX_ SvRV (coro_current));
2191
2192 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2193}
2194
2195static void
2196slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 frame->prepare = prepare_cede;
2199 frame->check = slf_check_nop;
2200}
2201
2202static void
2203slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2204{
2205 frame->prepare = prepare_cede_notself;
2206 frame->check = slf_check_nop;
2207}
2208
2209/*
2210 * these not obviously related functions are all rolled into one
2211 * function to increase chances that they all will call transfer with the same
2212 * stack offset
2213 * SLF stands for "schedule-like-function".
2214 */
2215static OP *
2216pp_slf (pTHX)
2217{
2218 I32 checkmark; /* mark SP to see how many elements check has pushed */
2219
2220 /* set up the slf frame, unless it has already been set-up */
2221 /* the latter happens when a new coro has been started */
2222 /* or when a new cctx was attached to an existing coroutine */
2223 if (expect_true (!slf_frame.prepare))
2224 {
2225 /* first iteration */
2226 dSP;
2227 SV **arg = PL_stack_base + TOPMARK + 1;
2228 int items = SP - arg; /* args without function object */
2229 SV *gv = *sp;
2230
2231 /* do a quick consistency check on the "function" object, and if it isn't */
2232 /* for us, divert to the real entersub */
2233 if (SvTYPE (gv) != SVt_PVGV
2234 || !GvCV (gv)
2235 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2236 return PL_ppaddr[OP_ENTERSUB](aTHX);
2237
2238 if (!(PL_op->op_flags & OPf_STACKED))
2239 {
2240 /* ampersand-form of call, use @_ instead of stack */
2241 AV *av = GvAV (PL_defgv);
2242 arg = AvARRAY (av);
2243 items = AvFILLp (av) + 1;
2244 }
2245
2246 /* now call the init function, which needs to set up slf_frame */
2247 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2248 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2249
2250 /* pop args */
2251 SP = PL_stack_base + POPMARK;
2252
2253 PUTBACK;
2254 }
2255
2256 /* now that we have a slf_frame, interpret it! */
2257 /* we use a callback system not to make the code needlessly */
2258 /* complicated, but so we can run multiple perl coros from one cctx */
2259
2260 do
2261 {
2262 struct coro_transfer_args ta;
2263
2264 slf_frame.prepare (aTHX_ &ta);
2265 TRANSFER (ta, 0);
2266
2267 checkmark = PL_stack_sp - PL_stack_base;
2268 }
2269 while (slf_frame.check (aTHX_ &slf_frame));
2270
2271 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2272
2273 /* exception handling */
2274 if (expect_false (CORO_THROW))
2275 {
2276 SV *exception = sv_2mortal (CORO_THROW);
2277
2278 CORO_THROW = 0;
2279 sv_setsv (ERRSV, exception);
2280 croak (0);
2281 }
2282
2283 /* return value handling - mostly like entersub */
2284 /* make sure we put something on the stack in scalar context */
2285 if (GIMME_V == G_SCALAR)
2286 {
2287 dSP;
2288 SV **bot = PL_stack_base + checkmark;
2289
2290 if (sp == bot) /* too few, push undef */
2291 bot [1] = &PL_sv_undef;
2292 else if (sp != bot + 1) /* too many, take last one */
2293 bot [1] = *sp;
2294
2295 SP = bot + 1;
2296
2297 PUTBACK;
2298 }
2299
2300 return NORMAL;
2301}
2302
2303static void
2304api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2305{
2306 int i;
2307 SV **arg = PL_stack_base + ax;
2308 int items = PL_stack_sp - arg + 1;
2309
2310 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2311
2312 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2313 && PL_op->op_ppaddr != pp_slf)
2314 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2315
2316 CvFLAGS (cv) |= CVf_SLF;
2317 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2318 slf_cv = cv;
2319
2320 /* we patch the op, and then re-run the whole call */
2321 /* we have to put the same argument on the stack for this to work */
2322 /* and this will be done by pp_restore */
2323 slf_restore.op_next = (OP *)&slf_restore;
2324 slf_restore.op_type = OP_CUSTOM;
2325 slf_restore.op_ppaddr = pp_restore;
2326 slf_restore.op_first = PL_op;
2327
2328 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2329
2330 if (PL_op->op_flags & OPf_STACKED)
2331 {
2332 if (items > slf_arga)
2333 {
2334 slf_arga = items;
2335 free (slf_argv);
2336 slf_argv = malloc (slf_arga * sizeof (SV *));
2337 }
2338
2339 slf_argc = items;
2340
2341 for (i = 0; i < items; ++i)
2342 slf_argv [i] = SvREFCNT_inc (arg [i]);
2343 }
2344 else
2345 slf_argc = 0;
2346
2347 PL_op->op_ppaddr = pp_slf;
2348 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2349
2350 PL_op = (OP *)&slf_restore;
2351}
2352
2353/*****************************************************************************/
2354/* dynamic wind */
2355
2356static void
2357on_enterleave_call (pTHX_ SV *cb)
2358{
2359 dSP;
2360
2361 PUSHSTACK;
2362
2363 PUSHMARK (SP);
2364 PUTBACK;
2365 call_sv (cb, G_VOID | G_DISCARD);
2366 SPAGAIN;
2367
2368 POPSTACK;
2369}
2370
2371static SV *
2372coro_avp_pop_and_free (pTHX_ AV **avp)
2373{
2374 AV *av = *avp;
2375 SV *res = av_pop (av);
2376
2377 if (AvFILLp (av) < 0)
2378 {
2379 *avp = 0;
2380 SvREFCNT_dec (av);
2381 }
2382
2383 return res;
2384}
2385
2386static void
2387coro_pop_on_enter (pTHX_ void *coro)
2388{
2389 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2390 SvREFCNT_dec (cb);
2391}
2392
2393static void
2394coro_pop_on_leave (pTHX_ void *coro)
2395{
2396 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2397 on_enterleave_call (aTHX_ sv_2mortal (cb));
2398}
2399
2400/*****************************************************************************/
2401/* PerlIO::cede */
2402
2403typedef struct
2404{
2405 PerlIOBuf base;
2406 NV next, every;
2407} PerlIOCede;
2408
2409static IV
2410PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2411{
2412 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2413
2414 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2415 self->next = nvtime () + self->every;
2416
2417 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2418}
2419
2420static SV *
2421PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2422{
2423 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2424
2425 return newSVnv (self->every);
2426}
2427
2428static IV
2429PerlIOCede_flush (pTHX_ PerlIO *f)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432 double now = nvtime ();
2433
2434 if (now >= self->next)
2435 {
2436 api_cede (aTHX);
2437 self->next = now + self->every;
2438 }
2439
2440 return PerlIOBuf_flush (aTHX_ f);
2441}
2442
2443static PerlIO_funcs PerlIO_cede =
2444{
2445 sizeof(PerlIO_funcs),
2446 "cede",
2447 sizeof(PerlIOCede),
2448 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2449 PerlIOCede_pushed,
2450 PerlIOBuf_popped,
2451 PerlIOBuf_open,
2452 PerlIOBase_binmode,
2453 PerlIOCede_getarg,
2454 PerlIOBase_fileno,
2455 PerlIOBuf_dup,
2456 PerlIOBuf_read,
2457 PerlIOBuf_unread,
2458 PerlIOBuf_write,
2459 PerlIOBuf_seek,
2460 PerlIOBuf_tell,
2461 PerlIOBuf_close,
2462 PerlIOCede_flush,
2463 PerlIOBuf_fill,
2464 PerlIOBase_eof,
2465 PerlIOBase_error,
2466 PerlIOBase_clearerr,
2467 PerlIOBase_setlinebuf,
2468 PerlIOBuf_get_base,
2469 PerlIOBuf_bufsiz,
2470 PerlIOBuf_get_ptr,
2471 PerlIOBuf_get_cnt,
2472 PerlIOBuf_set_ptrcnt,
2473};
2474
2475/*****************************************************************************/
2476/* Coro::Semaphore & Coro::Signal */
2477
2478static SV *
2479coro_waitarray_new (pTHX_ int count)
2480{
2481 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2482 AV *av = newAV ();
2483 SV **ary;
2484
2485 /* unfortunately, building manually saves memory */
2486 Newx (ary, 2, SV *);
2487 AvALLOC (av) = ary;
2488#if PERL_VERSION_ATLEAST (5,10,0)
2489 AvARRAY (av) = ary;
2490#else
2491 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2492 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2493 SvPVX ((SV *)av) = (char *)ary;
2494#endif
2495 AvMAX (av) = 1;
2496 AvFILLp (av) = 0;
2497 ary [0] = newSViv (count);
2498
2499 return newRV_noinc ((SV *)av);
2500}
2501
2502/* semaphore */
2503
2504static void
2505coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2506{
2507 SV *count_sv = AvARRAY (av)[0];
2508 IV count = SvIVX (count_sv);
2509
2510 count += adjust;
2511 SvIVX (count_sv) = count;
2512
2513 /* now wake up as many waiters as are expected to lock */
2514 while (count > 0 && AvFILLp (av) > 0)
2515 {
2516 SV *cb;
2517
2518 /* swap first two elements so we can shift a waiter */
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = count_sv;
2521 cb = av_shift (av);
2522
2523 if (SvOBJECT (cb))
2524 {
2525 api_ready (aTHX_ cb);
2526 --count;
2527 }
2528 else if (SvTYPE (cb) == SVt_PVCV)
2529 {
2530 dSP;
2531 PUSHMARK (SP);
2532 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2533 PUTBACK;
2534 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2535 }
2536
2537 SvREFCNT_dec (cb);
2538 }
2539}
2540
2541static void
2542coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2543{
2544 /* call $sem->adjust (0) to possibly wake up some other waiters */
2545 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2546}
2547
2548static int
2549slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2550{
2551 AV *av = (AV *)frame->data;
2552 SV *count_sv = AvARRAY (av)[0];
2553
2554 /* if we are about to throw, don't actually acquire the lock, just throw */
2555 if (CORO_THROW)
2556 return 0;
2557 else if (SvIVX (count_sv) > 0)
2558 {
2559 SvSTATE_current->on_destroy = 0;
2560
2561 if (acquire)
2562 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2563 else
2564 coro_semaphore_adjust (aTHX_ av, 0);
2565
2566 return 0;
2567 }
2568 else
2569 {
2570 int i;
2571 /* if we were woken up but can't down, we look through the whole */
2572 /* waiters list and only add us if we aren't in there already */
2573 /* this avoids some degenerate memory usage cases */
2574
2575 for (i = 1; i <= AvFILLp (av); ++i)
2576 if (AvARRAY (av)[i] == SvRV (coro_current))
2577 return 1;
2578
2579 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2580 return 1;
2581 }
2582}
2583
2584static int
2585slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2586{
2587 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2588}
2589
2590static int
2591slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2592{
2593 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2594}
2595
2596static void
2597slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2598{
2599 AV *av = (AV *)SvRV (arg [0]);
2600
2601 if (SvIVX (AvARRAY (av)[0]) > 0)
2602 {
2603 frame->data = (void *)av;
2604 frame->prepare = prepare_nop;
2605 }
2606 else
2607 {
2608 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2609
2610 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2611 frame->prepare = prepare_schedule;
2612
2613 /* to avoid race conditions when a woken-up coro gets terminated */
2614 /* we arrange for a temporary on_destroy that calls adjust (0) */
2615 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2616 }
2617}
2618
2619static void
2620slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2621{
2622 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2623 frame->check = slf_check_semaphore_down;
2624}
2625
2626static void
2627slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2628{
2629 if (items >= 2)
2630 {
2631 /* callback form */
2632 AV *av = (AV *)SvRV (arg [0]);
2633 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2634
2635 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2636
2637 if (SvIVX (AvARRAY (av)[0]) > 0)
2638 coro_semaphore_adjust (aTHX_ av, 0);
2639
2640 frame->prepare = prepare_nop;
2641 frame->check = slf_check_nop;
2642 }
2643 else
2644 {
2645 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2646 frame->check = slf_check_semaphore_wait;
2647 }
2648}
2649
2650/* signal */
2651
2652static void
2653coro_signal_wake (pTHX_ AV *av, int count)
2654{
2655 SvIVX (AvARRAY (av)[0]) = 0;
2656
2657 /* now signal count waiters */
2658 while (count > 0 && AvFILLp (av) > 0)
2659 {
2660 SV *cb;
2661
2662 /* swap first two elements so we can shift a waiter */
2663 cb = AvARRAY (av)[0];
2664 AvARRAY (av)[0] = AvARRAY (av)[1];
2665 AvARRAY (av)[1] = cb;
2666
2667 cb = av_shift (av);
2668
2669 api_ready (aTHX_ cb);
2670 sv_setiv (cb, 0); /* signal waiter */
2671 SvREFCNT_dec (cb);
2672
2673 --count;
2674 }
2675}
2676
2677static int
2678slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2679{
2680 /* if we are about to throw, also stop waiting */
2681 return SvROK ((SV *)frame->data) && !CORO_THROW;
2682}
2683
2684static void
2685slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2686{
2687 AV *av = (AV *)SvRV (arg [0]);
2688
2689 if (SvIVX (AvARRAY (av)[0]))
2690 {
2691 SvIVX (AvARRAY (av)[0]) = 0;
2692 frame->prepare = prepare_nop;
2693 frame->check = slf_check_nop;
2694 }
2695 else
2696 {
2697 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2698
2699 av_push (av, waiter);
2700
2701 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2702 frame->prepare = prepare_schedule;
2703 frame->check = slf_check_signal_wait;
2704 }
2705}
2706
2707/*****************************************************************************/
2708/* Coro::AIO */
2709
2710#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2711
2712/* helper storage struct */
2713struct io_state
2714{
2715 int errorno;
2716 I32 laststype; /* U16 in 5.10.0 */
2717 int laststatval;
2718 Stat_t statcache;
2719};
2720
2721static void
2722coro_aio_callback (pTHX_ CV *cv)
2723{
2724 dXSARGS;
2725 AV *state = (AV *)GENSUB_ARG;
2726 SV *coro = av_pop (state);
2727 SV *data_sv = newSV (sizeof (struct io_state));
2728
2729 av_extend (state, items - 1);
2730
2731 sv_upgrade (data_sv, SVt_PV);
2732 SvCUR_set (data_sv, sizeof (struct io_state));
2733 SvPOK_only (data_sv);
2734
2735 {
2736 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2737
2738 data->errorno = errno;
2739 data->laststype = PL_laststype;
2740 data->laststatval = PL_laststatval;
2741 data->statcache = PL_statcache;
2742 }
2743
2744 /* now build the result vector out of all the parameters and the data_sv */
2745 {
2746 int i;
2747
2748 for (i = 0; i < items; ++i)
2749 av_push (state, SvREFCNT_inc_NN (ST (i)));
2750 }
2751
2752 av_push (state, data_sv);
2753
2754 api_ready (aTHX_ coro);
2755 SvREFCNT_dec (coro);
2756 SvREFCNT_dec ((AV *)state);
2757}
2758
2759static int
2760slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2761{
2762 AV *state = (AV *)frame->data;
2763
2764 /* if we are about to throw, return early */
2765 /* this does not cancel the aio request, but at least */
2766 /* it quickly returns */
2767 if (CORO_THROW)
2768 return 0;
2769
2770 /* one element that is an RV? repeat! */
2771 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2772 return 1;
2773
2774 /* restore status */
2775 {
2776 SV *data_sv = av_pop (state);
2777 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2778
2779 errno = data->errorno;
2780 PL_laststype = data->laststype;
2781 PL_laststatval = data->laststatval;
2782 PL_statcache = data->statcache;
2783
2784 SvREFCNT_dec (data_sv);
2785 }
2786
2787 /* push result values */
2788 {
2789 dSP;
2790 int i;
2791
2792 EXTEND (SP, AvFILLp (state) + 1);
2793 for (i = 0; i <= AvFILLp (state); ++i)
2794 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2795
2796 PUTBACK;
2797 }
2798
2799 return 0;
2800}
2801
2802static void
2803slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2804{
2805 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2806 SV *coro_hv = SvRV (coro_current);
2807 struct coro *coro = SvSTATE_hv (coro_hv);
2808
2809 /* put our coroutine id on the state arg */
2810 av_push (state, SvREFCNT_inc_NN (coro_hv));
2811
2812 /* first see whether we have a non-zero priority and set it as AIO prio */
2813 if (coro->prio)
2814 {
2815 dSP;
2816
2817 static SV *prio_cv;
2818 static SV *prio_sv;
2819
2820 if (expect_false (!prio_cv))
2821 {
2822 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2823 prio_sv = newSViv (0);
2824 }
2825
2826 PUSHMARK (SP);
2827 sv_setiv (prio_sv, coro->prio);
2828 XPUSHs (prio_sv);
2829
2830 PUTBACK;
2831 call_sv (prio_cv, G_VOID | G_DISCARD);
2832 }
2833
2834 /* now call the original request */
2835 {
2836 dSP;
2837 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2838 int i;
2839
2840 PUSHMARK (SP);
2841
2842 /* first push all args to the stack */
2843 EXTEND (SP, items + 1);
2844
2845 for (i = 0; i < items; ++i)
2846 PUSHs (arg [i]);
2847
2848 /* now push the callback closure */
2849 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2850
2851 /* now call the AIO function - we assume our request is uncancelable */
2852 PUTBACK;
2853 call_sv ((SV *)req, G_VOID | G_DISCARD);
2854 }
2855
2856 /* now that the requets is going, we loop toll we have a result */
2857 frame->data = (void *)state;
2858 frame->prepare = prepare_schedule;
2859 frame->check = slf_check_aio_req;
2860}
2861
2862static void
2863coro_aio_req_xs (pTHX_ CV *cv)
2864{
2865 dXSARGS;
2866
2867 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2868
2869 XSRETURN_EMPTY;
2870}
2871
2872/*****************************************************************************/
2873
2874#if CORO_CLONE
2875# include "clone.c"
2876#endif
2877
892MODULE = Coro::State PACKAGE = Coro::State 2878MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
893 2879
894PROTOTYPES: ENABLE 2880PROTOTYPES: DISABLE
895 2881
896BOOT: 2882BOOT:
897{ /* {} necessary for stoopid perl-5.6.x */ 2883{
898 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2884#ifdef USE_ITHREADS
899 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2885# if CORO_PTHREAD
2886 coro_thx = PERL_GET_CONTEXT;
2887# endif
2888#endif
2889 BOOT_PAGESIZE;
2890
2891 cctx_current = cctx_new_empty ();
2892
2893 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2894 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2895
2896 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2897 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2898 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2899
2900 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2901 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2902 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2903
900 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2904 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901 2905
902 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2906 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
903 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2907 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
904 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2908 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
905 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2909 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
906
907 if (!padlist_cache)
908 padlist_cache = newHV ();
909 2910
910 main_mainstack = PL_mainstack; 2911 main_mainstack = PL_mainstack;
2912 main_top_env = PL_top_env;
911 2913
2914 while (main_top_env->je_prev)
2915 main_top_env = main_top_env->je_prev;
2916
2917 {
2918 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2919
2920 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2921 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2922
2923 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2924 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2925 }
2926
912 coroapi.ver = CORO_API_VERSION; 2927 coroapi.ver = CORO_API_VERSION;
2928 coroapi.rev = CORO_API_REVISION;
2929
913 coroapi.transfer = api_transfer; 2930 coroapi.transfer = api_transfer;
914}
915 2931
916Coro::State 2932 coroapi.sv_state = SvSTATE_;
917_newprocess(args) 2933 coroapi.execute_slf = api_execute_slf;
918 SV * args 2934 coroapi.prepare_nop = prepare_nop;
919 PROTOTYPE: $ 2935 coroapi.prepare_schedule = prepare_schedule;
2936 coroapi.prepare_cede = prepare_cede;
2937 coroapi.prepare_cede_notself = prepare_cede_notself;
2938
2939 {
2940 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2941
2942 if (!svp) croak ("Time::HiRes is required");
2943 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2944
2945 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2946 }
2947
2948 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2949}
2950
2951SV *
2952new (char *klass, ...)
2953 ALIAS:
2954 Coro::new = 1
920 CODE: 2955 CODE:
921 Coro__State coro; 2956{
2957 struct coro *coro;
2958 MAGIC *mg;
2959 HV *hv;
2960 CV *cb;
2961 int i;
922 2962
923 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2963 if (items > 1)
924 croak ("Coro::State::_newprocess expects an arrayref");
925 2964 {
2965 cb = coro_sv_2cv (aTHX_ ST (1));
2966
2967 if (!ix)
2968 {
2969 if (CvISXSUB (cb))
2970 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2971
2972 if (!CvROOT (cb))
2973 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2974 }
2975 }
2976
926 New (0, coro, 1, struct coro); 2977 Newz (0, coro, 1, struct coro);
2978 coro->args = newAV ();
2979 coro->flags = CF_NEW;
927 2980
928 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2981 if (coro_first) coro_first->prev = coro;
929 coro->mainstack = 0; /* actual work is done inside transfer */ 2982 coro->next = coro_first;
930 coro->stack = 0; 2983 coro_first = coro;
931 2984
932 RETVAL = coro; 2985 coro->hv = hv = newHV ();
2986 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2987 mg->mg_flags |= MGf_DUP;
2988 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2989
2990 if (items > 1)
2991 {
2992 av_extend (coro->args, items - 1 + ix - 1);
2993
2994 if (ix)
2995 {
2996 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2997 cb = cv_coro_run;
2998 }
2999
3000 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3001
3002 for (i = 2; i < items; i++)
3003 av_push (coro->args, newSVsv (ST (i)));
3004 }
3005}
933 OUTPUT: 3006 OUTPUT:
934 RETVAL 3007 RETVAL
935 3008
936void 3009void
937transfer(prev, next, flags) 3010transfer (...)
938 SV *prev
939 SV *next
940 int flags
941 PROTOTYPE: @ 3011 PROTOTYPE: $$
942 CODE: 3012 CODE:
943 PUTBACK; 3013 CORO_EXECUTE_SLF_XS (slf_init_transfer);
944 SV_CORO (next, "Coro::transfer"); 3014
945 SV_CORO (prev, "Coro::transfer"); 3015bool
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3016_destroy (SV *coro_sv)
947 SPAGAIN; 3017 CODE:
3018 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3019 OUTPUT:
3020 RETVAL
948 3021
949void 3022void
950DESTROY(coro)
951 Coro::State coro
952 CODE:
953
954 if (coro->mainstack && coro->mainstack != main_mainstack)
955 {
956 struct coro temp;
957
958 PUTBACK;
959 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
960 LOAD(aTHX_ coro);
961 SPAGAIN;
962
963 destroy_stacks (aTHX);
964
965 LOAD((&temp)); /* this will get rid of defsv etc.. */
966 SPAGAIN;
967
968 coro->mainstack = 0;
969 }
970
971 deallocate_stack (coro);
972
973 Safefree (coro);
974
975void
976flush()
977 CODE:
978#ifdef MAY_FLUSH
979 flush_padlist_cache ();
980#endif
981
982void
983_exit(code) 3023_exit (int code)
984 int code
985 PROTOTYPE: $ 3024 PROTOTYPE: $
986 CODE: 3025 CODE:
987#if defined(__GLIBC__) || _POSIX_C_SOURCE
988 _exit (code); 3026 _exit (code);
3027
3028SV *
3029clone (Coro::State coro)
3030 CODE:
3031{
3032#if CORO_CLONE
3033 struct coro *ncoro = coro_clone (aTHX_ coro);
3034 MAGIC *mg;
3035 /* TODO: too much duplication */
3036 ncoro->hv = newHV ();
3037 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3038 mg->mg_flags |= MGf_DUP;
3039 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
989#else 3040#else
990 signal (SIGTERM, SIG_DFL); 3041 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
991 raise (SIGTERM);
992 exit (code);
993#endif 3042#endif
3043}
3044 OUTPUT:
3045 RETVAL
994 3046
995MODULE = Coro::State PACKAGE = Coro::Cont 3047int
3048cctx_stacksize (int new_stacksize = 0)
3049 PROTOTYPE: ;$
3050 CODE:
3051 RETVAL = cctx_stacksize;
3052 if (new_stacksize)
3053 {
3054 cctx_stacksize = new_stacksize;
3055 ++cctx_gen;
3056 }
3057 OUTPUT:
3058 RETVAL
996 3059
997# this is slightly dirty (should expose a c-level api) 3060int
3061cctx_max_idle (int max_idle = 0)
3062 PROTOTYPE: ;$
3063 CODE:
3064 RETVAL = cctx_max_idle;
3065 if (max_idle > 1)
3066 cctx_max_idle = max_idle;
3067 OUTPUT:
3068 RETVAL
3069
3070int
3071cctx_count ()
3072 PROTOTYPE:
3073 CODE:
3074 RETVAL = cctx_count;
3075 OUTPUT:
3076 RETVAL
3077
3078int
3079cctx_idle ()
3080 PROTOTYPE:
3081 CODE:
3082 RETVAL = cctx_idle;
3083 OUTPUT:
3084 RETVAL
998 3085
999void 3086void
1000yield(...) 3087list ()
1001 PROTOTYPE: @ 3088 PROTOTYPE:
3089 PPCODE:
3090{
3091 struct coro *coro;
3092 for (coro = coro_first; coro; coro = coro->next)
3093 if (coro->hv)
3094 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3095}
3096
3097void
3098call (Coro::State coro, SV *coderef)
3099 ALIAS:
3100 eval = 1
3101 CODE:
3102{
3103 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3104 {
3105 struct coro *current = SvSTATE_current;
3106
3107 if (current != coro)
3108 {
3109 PUTBACK;
3110 save_perl (aTHX_ current);
3111 load_perl (aTHX_ coro);
3112 SPAGAIN;
3113 }
3114
3115 PUSHSTACK;
3116
3117 PUSHMARK (SP);
3118 PUTBACK;
3119
3120 if (ix)
3121 eval_sv (coderef, 0);
3122 else
3123 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3124
3125 POPSTACK;
3126 SPAGAIN;
3127
3128 if (current != coro)
3129 {
3130 PUTBACK;
3131 save_perl (aTHX_ coro);
3132 load_perl (aTHX_ current);
3133 SPAGAIN;
3134 }
3135 }
3136}
3137
3138SV *
3139is_ready (Coro::State coro)
3140 PROTOTYPE: $
3141 ALIAS:
3142 is_ready = CF_READY
3143 is_running = CF_RUNNING
3144 is_new = CF_NEW
3145 is_destroyed = CF_DESTROYED
3146 is_suspended = CF_SUSPENDED
3147 CODE:
3148 RETVAL = boolSV (coro->flags & ix);
3149 OUTPUT:
3150 RETVAL
3151
3152void
3153throw (Coro::State self, SV *throw = &PL_sv_undef)
3154 PROTOTYPE: $;$
1002 CODE: 3155 CODE:
1003 static SV *returnstk; 3156{
1004 SV *sv; 3157 struct coro *current = SvSTATE_current;
1005 AV *defav = GvAV (PL_defgv); 3158 SV **throwp = self == current ? &CORO_THROW : &self->except;
1006 struct coro *prev, *next;
1007
1008 if (!returnstk)
1009 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1010
1011 /* set up @_ -- ugly */
1012 av_clear (defav);
1013 av_fill (defav, items - 1);
1014 while (items--)
1015 av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018 sv = av_pop ((AV *)SvRV (returnstk));
1019 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1020 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1021 SvREFCNT_dec (sv); 3159 SvREFCNT_dec (*throwp);
1022 3160 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
1023 transfer(aTHX_ prev, next, 0);
1024
1025MODULE = Coro::State PACKAGE = Coro
1026
1027# this is slightly dirty (should expose a c-level api)
1028
1029BOOT:
1030{
1031 int i;
1032 HV *stash = gv_stashpv ("Coro", TRUE);
1033
1034 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040
1041 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1042 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1043
1044 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045 coro_ready[i] = newAV ();
1046
1047 {
1048 SV *sv = perl_get_sv("Coro::API", 1);
1049
1050 coroapi.schedule = api_schedule;
1051 coroapi.cede = api_cede;
1052 coroapi.ready = api_ready;
1053 coroapi.nready = &coro_nready;
1054 coroapi.current = coro_current;
1055
1056 GCoroAPI = &coroapi;
1057 sv_setiv(sv, (IV)&coroapi);
1058 SvREADONLY_on(sv);
1059 }
1060} 3161}
1061 3162
1062void 3163void
1063ready(self) 3164api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1064 SV * self 3165 PROTOTYPE: $;$
3166 C_ARGS: aTHX_ coro, flags
3167
3168SV *
3169has_cctx (Coro::State coro)
1065 PROTOTYPE: $ 3170 PROTOTYPE: $
1066 CODE: 3171 CODE:
1067 api_ready (self); 3172 /* maybe manage the running flag differently */
3173 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3174 OUTPUT:
3175 RETVAL
1068 3176
1069int 3177int
3178is_traced (Coro::State coro)
3179 PROTOTYPE: $
3180 CODE:
3181 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3182 OUTPUT:
3183 RETVAL
3184
3185UV
3186rss (Coro::State coro)
3187 PROTOTYPE: $
3188 ALIAS:
3189 usecount = 1
3190 CODE:
3191 switch (ix)
3192 {
3193 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3194 case 1: RETVAL = coro->usecount; break;
3195 }
3196 OUTPUT:
3197 RETVAL
3198
3199void
3200force_cctx ()
3201 PROTOTYPE:
3202 CODE:
3203 cctx_current->idle_sp = 0;
3204
3205void
3206swap_defsv (Coro::State self)
3207 PROTOTYPE: $
3208 ALIAS:
3209 swap_defav = 1
3210 CODE:
3211 if (!self->slot)
3212 croak ("cannot swap state with coroutine that has no saved state,");
3213 else
3214 {
3215 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3216 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3217
3218 SV *tmp = *src; *src = *dst; *dst = tmp;
3219 }
3220
3221void
3222cancel (Coro::State self)
3223 CODE:
3224 coro_state_destroy (aTHX_ self);
3225 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3226
3227
3228MODULE = Coro::State PACKAGE = Coro
3229
3230BOOT:
3231{
3232 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3233 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3234 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3235 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3236 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3237 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3238 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3239 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3240 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3241
3242 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3243 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3244 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3245 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3246
3247 coro_stash = gv_stashpv ("Coro", TRUE);
3248
3249 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3250 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3251 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3252 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3253 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3254 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3255
3256 {
3257 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3258
3259 coroapi.schedule = api_schedule;
3260 coroapi.schedule_to = api_schedule_to;
3261 coroapi.cede = api_cede;
3262 coroapi.cede_notself = api_cede_notself;
3263 coroapi.ready = api_ready;
3264 coroapi.is_ready = api_is_ready;
3265 coroapi.nready = coro_nready;
3266 coroapi.current = coro_current;
3267
3268 /*GCoroAPI = &coroapi;*/
3269 sv_setiv (sv, (IV)&coroapi);
3270 SvREADONLY_on (sv);
3271 }
3272}
3273
3274void
3275terminate (...)
3276 CODE:
3277 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3278
3279void
3280schedule (...)
3281 CODE:
3282 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3283
3284void
3285schedule_to (...)
3286 CODE:
3287 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3288
3289void
3290cede_to (...)
3291 CODE:
3292 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3293
3294void
3295cede (...)
3296 CODE:
3297 CORO_EXECUTE_SLF_XS (slf_init_cede);
3298
3299void
3300cede_notself (...)
3301 CODE:
3302 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3303
3304void
3305_set_current (SV *current)
3306 PROTOTYPE: $
3307 CODE:
3308 SvREFCNT_dec (SvRV (coro_current));
3309 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3310
3311void
3312_set_readyhook (SV *hook)
3313 PROTOTYPE: $
3314 CODE:
3315 SvREFCNT_dec (coro_readyhook);
3316 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3317
3318int
3319prio (Coro::State coro, int newprio = 0)
3320 PROTOTYPE: $;$
3321 ALIAS:
3322 nice = 1
3323 CODE:
3324{
3325 RETVAL = coro->prio;
3326
3327 if (items > 1)
3328 {
3329 if (ix)
3330 newprio = coro->prio - newprio;
3331
3332 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3333 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3334
3335 coro->prio = newprio;
3336 }
3337}
3338 OUTPUT:
3339 RETVAL
3340
3341SV *
3342ready (SV *self)
3343 PROTOTYPE: $
3344 CODE:
3345 RETVAL = boolSV (api_ready (aTHX_ self));
3346 OUTPUT:
3347 RETVAL
3348
3349int
1070nready(...) 3350nready (...)
1071 PROTOTYPE: 3351 PROTOTYPE:
1072 CODE: 3352 CODE:
1073 RETVAL = coro_nready; 3353 RETVAL = coro_nready;
1074 OUTPUT: 3354 OUTPUT:
1075 RETVAL 3355 RETVAL
1076 3356
1077void 3357void
1078schedule(...) 3358suspend (Coro::State self)
1079 PROTOTYPE: 3359 PROTOTYPE: $
1080 CODE: 3360 CODE:
1081 api_schedule (); 3361 self->flags |= CF_SUSPENDED;
1082 3362
1083void 3363void
1084cede(...) 3364resume (Coro::State self)
1085 PROTOTYPE: 3365 PROTOTYPE: $
1086 CODE: 3366 CODE:
3367 self->flags &= ~CF_SUSPENDED;
3368
3369void
3370_pool_handler (...)
3371 CODE:
3372 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3373
3374void
3375async_pool (SV *cv, ...)
3376 PROTOTYPE: &@
3377 PPCODE:
3378{
3379 HV *hv = (HV *)av_pop (av_async_pool);
3380 AV *av = newAV ();
3381 SV *cb = ST (0);
3382 int i;
3383
3384 av_extend (av, items - 2);
3385 for (i = 1; i < items; ++i)
3386 av_push (av, SvREFCNT_inc_NN (ST (i)));
3387
3388 if ((SV *)hv == &PL_sv_undef)
3389 {
3390 PUSHMARK (SP);
3391 EXTEND (SP, 2);
3392 PUSHs (sv_Coro);
3393 PUSHs ((SV *)cv_pool_handler);
3394 PUTBACK;
3395 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3396 SPAGAIN;
3397
3398 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3399 }
3400
3401 {
3402 struct coro *coro = SvSTATE_hv (hv);
3403
3404 assert (!coro->invoke_cb);
3405 assert (!coro->invoke_av);
3406 coro->invoke_cb = SvREFCNT_inc (cb);
3407 coro->invoke_av = av;
3408 }
3409
3410 api_ready (aTHX_ (SV *)hv);
3411
3412 if (GIMME_V != G_VOID)
3413 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3414 else
3415 SvREFCNT_dec (hv);
3416}
3417
3418SV *
3419rouse_cb ()
3420 PROTOTYPE:
3421 CODE:
3422 RETVAL = coro_new_rouse_cb (aTHX);
3423 OUTPUT:
3424 RETVAL
3425
3426void
3427rouse_wait (...)
3428 PROTOTYPE: ;$
3429 PPCODE:
3430 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3431
3432void
3433on_enter (SV *block)
3434 ALIAS:
3435 on_leave = 1
3436 PROTOTYPE: &
3437 CODE:
3438{
3439 struct coro *coro = SvSTATE_current;
3440 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3441
3442 block = (SV *)coro_sv_2cv (aTHX_ block);
3443
3444 if (!*avp)
3445 *avp = newAV ();
3446
3447 av_push (*avp, SvREFCNT_inc (block));
3448
3449 if (!ix)
3450 on_enterleave_call (aTHX_ block);
3451
3452 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3453 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3454 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3455}
3456
3457
3458MODULE = Coro::State PACKAGE = PerlIO::cede
3459
3460BOOT:
3461 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3462
3463
3464MODULE = Coro::State PACKAGE = Coro::Semaphore
3465
3466SV *
3467new (SV *klass, SV *count = 0)
3468 CODE:
3469 RETVAL = sv_bless (
3470 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3471 GvSTASH (CvGV (cv))
3472 );
3473 OUTPUT:
3474 RETVAL
3475
3476# helper for Coro::Channel and others
3477SV *
3478_alloc (int count)
3479 CODE:
3480 RETVAL = coro_waitarray_new (aTHX_ count);
3481 OUTPUT:
3482 RETVAL
3483
3484SV *
3485count (SV *self)
3486 CODE:
3487 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3488 OUTPUT:
3489 RETVAL
3490
3491void
3492up (SV *self, int adjust = 1)
3493 ALIAS:
3494 adjust = 1
3495 CODE:
3496 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3497
3498void
3499down (...)
3500 CODE:
3501 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3502
3503void
3504wait (...)
3505 CODE:
3506 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3507
3508void
3509try (SV *self)
3510 PPCODE:
3511{
3512 AV *av = (AV *)SvRV (self);
3513 SV *count_sv = AvARRAY (av)[0];
3514 IV count = SvIVX (count_sv);
3515
3516 if (count > 0)
3517 {
3518 --count;
3519 SvIVX (count_sv) = count;
3520 XSRETURN_YES;
3521 }
3522 else
3523 XSRETURN_NO;
3524}
3525
3526void
3527waiters (SV *self)
3528 PPCODE:
3529{
3530 AV *av = (AV *)SvRV (self);
3531 int wcount = AvFILLp (av) + 1 - 1;
3532
3533 if (GIMME_V == G_SCALAR)
3534 XPUSHs (sv_2mortal (newSViv (wcount)));
3535 else
3536 {
3537 int i;
3538 EXTEND (SP, wcount);
3539 for (i = 1; i <= wcount; ++i)
3540 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3541 }
3542}
3543
3544MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3545
3546void
3547_may_delete (SV *sem, int count, int extra_refs)
3548 PPCODE:
3549{
3550 AV *av = (AV *)SvRV (sem);
3551
3552 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3553 && AvFILLp (av) == 0 /* no waiters, just count */
3554 && SvIV (AvARRAY (av)[0]) == count)
3555 XSRETURN_YES;
3556
3557 XSRETURN_NO;
3558}
3559
3560MODULE = Coro::State PACKAGE = Coro::Signal
3561
3562SV *
3563new (SV *klass)
3564 CODE:
3565 RETVAL = sv_bless (
3566 coro_waitarray_new (aTHX_ 0),
3567 GvSTASH (CvGV (cv))
3568 );
3569 OUTPUT:
3570 RETVAL
3571
3572void
3573wait (...)
3574 CODE:
3575 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3576
3577void
3578broadcast (SV *self)
3579 CODE:
3580{
3581 AV *av = (AV *)SvRV (self);
3582 coro_signal_wake (aTHX_ av, AvFILLp (av));
3583}
3584
3585void
3586send (SV *self)
3587 CODE:
3588{
3589 AV *av = (AV *)SvRV (self);
3590
3591 if (AvFILLp (av))
3592 coro_signal_wake (aTHX_ av, 1);
3593 else
3594 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3595}
3596
3597IV
3598awaited (SV *self)
3599 CODE:
3600 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3601 OUTPUT:
3602 RETVAL
3603
3604
3605MODULE = Coro::State PACKAGE = Coro::AnyEvent
3606
3607BOOT:
3608 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3609
3610void
3611_schedule (...)
3612 CODE:
3613{
3614 static int incede;
3615
1087 api_cede (); 3616 api_cede_notself (aTHX);
1088 3617
3618 ++incede;
3619 while (coro_nready >= incede && api_cede (aTHX))
3620 ;
3621
3622 sv_setsv (sv_activity, &PL_sv_undef);
3623 if (coro_nready >= incede)
3624 {
3625 PUSHMARK (SP);
3626 PUTBACK;
3627 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3628 }
3629
3630 --incede;
3631}
3632
3633
3634MODULE = Coro::State PACKAGE = Coro::AIO
3635
3636void
3637_register (char *target, char *proto, SV *req)
3638 CODE:
3639{
3640 CV *req_cv = coro_sv_2cv (aTHX_ req);
3641 /* newXSproto doesn't return the CV on 5.8 */
3642 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3643 sv_setpv ((SV *)slf_cv, proto);
3644 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3645}
3646

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