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Comparing Coro/Coro/State.xs (file contents):
Revision 1.37 by root, Tue Oct 9 00:39:11 2001 UTC vs.
Revision 1.349 by root, Wed Jun 10 00:47:24 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
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65 268
66 /* the stacks and related info (callchain etc..) */ 269 /* state data */
67 PERL_SI *curstackinfo; 270 struct CoroSLF slf_frame; /* saved slf frame */
68 AV *curstack;
69 AV *mainstack; 271 AV *mainstack;
70 SV **stack_sp; 272 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 273
274 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
95 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;
96}; 300};
97 301
98typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
100 304
101static AV *main_mainstack; /* used to differentiate between $main and others */ 305/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 306/* and get copied between struct coro and these variables */
103static SV *ucoro_state_sv; 307/* the mainr easonw e don't support windows process emulation */
104static U32 ucoro_state_hash; 308static struct CoroSLF slf_frame; /* the current slf frame */
105static HV *padlist_cache;
106
107/* mostly copied from op.c:cv_clone2 */
108STATIC AV *
109clone_padlist (AV *protopadlist)
110{
111 AV *av;
112 I32 ix;
113 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115 SV **pname = AvARRAY (protopad_name);
116 SV **ppad = AvARRAY (protopad);
117 I32 fname = AvFILLp (protopad_name);
118 I32 fpad = AvFILLp (protopad);
119 AV *newpadlist, *newpad_name, *newpad;
120 SV **npad;
121
122 newpad_name = newAV ();
123 for (ix = fname; ix >= 0; ix--)
124 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126 newpad = newAV ();
127 av_fill (newpad, AvFILLp (protopad));
128 npad = AvARRAY (newpad);
129
130 newpadlist = newAV ();
131 AvREAL_off (newpadlist);
132 av_store (newpadlist, 0, (SV *) newpad_name);
133 av_store (newpadlist, 1, (SV *) newpad);
134
135 av = newAV (); /* will be @_ */
136 av_extend (av, 0);
137 av_store (newpad, 0, (SV *) av);
138 AvFLAGS (av) = AVf_REIFY;
139
140 for (ix = fpad; ix > 0; ix--)
141 {
142 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
143 if (namesv && namesv != &PL_sv_undef)
144 {
145 char *name = SvPVX (namesv); /* XXX */
146 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
147 { /* lexical from outside? */
148 npad[ix] = SvREFCNT_inc (ppad[ix]);
149 }
150 else
151 { /* our own lexical */
152 SV *sv;
153 if (*name == '&')
154 sv = SvREFCNT_inc (ppad[ix]);
155 else if (*name == '@')
156 sv = (SV *) newAV ();
157 else if (*name == '%')
158 sv = (SV *) newHV ();
159 else
160 sv = NEWSV (0, 0);
161 if (!SvPADBUSY (sv))
162 SvPADMY_on (sv);
163 npad[ix] = sv;
164 }
165 }
166 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
167 {
168 npad[ix] = SvREFCNT_inc (ppad[ix]);
169 }
170 else
171 {
172 SV *sv = NEWSV (0, 0);
173 SvPADTMP_on (sv);
174 npad[ix] = sv;
175 }
176 }
177
178#if 0 /* return -ENOTUNDERSTOOD */
179 /* Now that vars are all in place, clone nested closures. */
180
181 for (ix = fpad; ix > 0; ix--) {
182 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183 if (namesv
184 && namesv != &PL_sv_undef
185 && !(SvFLAGS(namesv) & SVf_FAKE)
186 && *SvPVX(namesv) == '&'
187 && CvCLONE(ppad[ix]))
188 {
189 CV *kid = cv_clone((CV*)ppad[ix]);
190 SvREFCNT_dec(ppad[ix]);
191 CvCLONE_on(kid);
192 SvPADMY_on(kid);
193 npad[ix] = (SV*)kid;
194 }
195 }
196#endif
197
198 return newpadlist;
199}
200
201#ifdef MAY_FLUSH
202STATIC void
203free_padlist (AV *padlist)
204{
205 /* may be during global destruction */
206 if (SvREFCNT(padlist))
207 {
208 I32 i = AvFILLp(padlist);
209 while (i >= 0)
210 {
211 SV **svp = av_fetch(padlist, i--, FALSE);
212 SV *sv = svp ? *svp : Nullsv;
213 if (sv)
214 SvREFCNT_dec(sv);
215 }
216
217 SvREFCNT_dec((SV*)padlist);
218 }
219}
220#endif
221
222/* the next two functions merely cache the padlists */
223STATIC void
224get_padlist (CV *cv)
225{
226 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228 if (he && AvFILLp ((AV *)*he) >= 0)
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230 else
231 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232}
233
234STATIC void
235put_padlist (CV *cv)
236{
237 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239 if (SvTYPE (*he) != SVt_PVAV)
240 {
241 SvREFCNT_dec (*he);
242 *he = (SV *)newAV ();
243 }
244
245 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246}
247
248#ifdef MAY_FLUSH
249STATIC void
250flush_padlist_cache ()
251{
252 HV *hv = padlist_cache;
253 padlist_cache = newHV ();
254
255 if (hv_iterinit (hv))
256 {
257 HE *he;
258 AV *padlist;
259
260 while (!!(he = hv_iternext (hv)))
261 {
262 AV *av = (AV *)HeVAL(he);
263
264 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (padlist);
267 }
268 }
269
270 SvREFCNT_dec (hv);
271}
272#endif
273
274#define SB do {
275#define SE } while (0)
276
277#define LOAD(state) load_state(aTHX_ (state));
278#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282static void
283load_state(pTHX_ Coro__State c)
284{
285 PL_dowarn = c->dowarn;
286 PL_in_eval = c->in_eval;
287
288 PL_curstackinfo = c->curstackinfo;
289 PL_curstack = c->curstack;
290 PL_mainstack = c->mainstack;
291 PL_stack_sp = c->stack_sp;
292 PL_op = c->op;
293 PL_curpad = c->curpad;
294 PL_stack_base = c->stack_base;
295 PL_stack_max = c->stack_max;
296 PL_tmps_stack = c->tmps_stack;
297 PL_tmps_floor = c->tmps_floor;
298 PL_tmps_ix = c->tmps_ix;
299 PL_tmps_max = c->tmps_max;
300 PL_markstack = c->markstack;
301 PL_markstack_ptr = c->markstack_ptr;
302 PL_markstack_max = c->markstack_max;
303 PL_scopestack = c->scopestack;
304 PL_scopestack_ix = c->scopestack_ix;
305 PL_scopestack_max = c->scopestack_max;
306 PL_savestack = c->savestack;
307 PL_savestack_ix = c->savestack_ix;
308 PL_savestack_max = c->savestack_max;
309 PL_retstack = c->retstack;
310 PL_retstack_ix = c->retstack_ix;
311 PL_retstack_max = c->retstack_max;
312 PL_curcop = c->curcop;
313 PL_top_env = c->top_env;
314
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318
319 {
320 dSP;
321 CV *cv;
322
323 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs))
325 {
326 AV *padlist = (AV *)POPs;
327
328 if (padlist)
329 {
330 put_padlist (cv); /* mark this padlist as available */
331 CvPADLIST(cv) = padlist;
332#ifdef USE_THREADS
333 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334#endif
335 }
336
337 ++CvDEPTH(cv);
338 }
339
340 PUTBACK;
341 }
342}
343
344static void
345save_state(pTHX_ Coro__State c, int flags)
346{
347 {
348 dSP;
349 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo;
352
353 /*
354 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :(
356 */
357
358 PUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */
360 for (;;)
361 {
362 while (cxix >= 0)
363 {
364 PERL_CONTEXT *cx = &ccstk[cxix--];
365
366 if (CxTYPE(cx) == CXt_SUB)
367 {
368 CV *cv = cx->blk_sub.cv;
369 if (CvDEPTH(cv))
370 {
371#ifdef USE_THREADS
372 /*XPUSHs ((SV *)CvOWNER(cv));*/
373 /*CvOWNER(cv) = 0;*/
374 /*error must unlock this cv etc.. etc...*/
375#endif
376 EXTEND (SP, CvDEPTH(cv)*2);
377
378 while (--CvDEPTH(cv))
379 {
380 /* this tells the restore code to increment CvDEPTH */
381 PUSHs (Nullsv);
382 PUSHs ((SV *)cv);
383 }
384
385 PUSHs ((SV *)CvPADLIST(cv));
386 PUSHs ((SV *)cv);
387
388 get_padlist (cv); /* this is a monster */
389 }
390 }
391 else if (CxTYPE(cx) == CXt_FORMAT)
392 {
393 /* I never used formats, so how should I know how these are implemented? */
394 /* my bold guess is as a simple, plain sub... */
395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396 }
397 }
398
399 if (top_si->si_type == PERLSI_MAIN)
400 break;
401
402 top_si = top_si->si_prev;
403 ccstk = top_si->si_cxstack;
404 cxix = top_si->si_cxix;
405 }
406
407 PUTBACK;
408 }
409
410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413
414 c->dowarn = PL_dowarn;
415 c->in_eval = PL_in_eval;
416
417 c->curstackinfo = PL_curstackinfo;
418 c->curstack = PL_curstack;
419 c->mainstack = PL_mainstack;
420 c->stack_sp = PL_stack_sp;
421 c->op = PL_op;
422 c->curpad = PL_curpad;
423 c->stack_base = PL_stack_base;
424 c->stack_max = PL_stack_max;
425 c->tmps_stack = PL_tmps_stack;
426 c->tmps_floor = PL_tmps_floor;
427 c->tmps_ix = PL_tmps_ix;
428 c->tmps_max = PL_tmps_max;
429 c->markstack = PL_markstack;
430 c->markstack_ptr = PL_markstack_ptr;
431 c->markstack_max = PL_markstack_max;
432 c->scopestack = PL_scopestack;
433 c->scopestack_ix = PL_scopestack_ix;
434 c->scopestack_max = PL_scopestack_max;
435 c->savestack = PL_savestack;
436 c->savestack_ix = PL_savestack_ix;
437 c->savestack_max = PL_savestack_max;
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441 c->curcop = PL_curcop;
442 c->top_env = PL_top_env;
443}
444
445/*
446 * allocate various perl stacks. This is an exact copy
447 * of perl.c:init_stacks, except that it uses less memory
448 * on the assumption that coroutines do not usually need
449 * a lot of stackspace.
450 */
451STATIC void
452coro_init_stacks (pTHX)
453{
454 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455 PL_curstackinfo->si_type = PERLSI_MAIN;
456 PL_curstack = PL_curstackinfo->si_stack;
457 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458
459 PL_stack_base = AvARRAY(PL_curstack);
460 PL_stack_sp = PL_stack_base;
461 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462
463 New(50,PL_tmps_stack,96,SV*);
464 PL_tmps_floor = -1;
465 PL_tmps_ix = -1;
466 PL_tmps_max = 96;
467
468 New(54,PL_markstack,16,I32);
469 PL_markstack_ptr = PL_markstack;
470 PL_markstack_max = PL_markstack + 16;
471
472 SET_MARK_OFFSET;
473
474 New(54,PL_scopestack,16,I32);
475 PL_scopestack_ix = 0;
476 PL_scopestack_max = 16;
477
478 New(54,PL_savestack,96,ANY);
479 PL_savestack_ix = 0;
480 PL_savestack_max = 96;
481
482 New(54,PL_retstack,8,OP*);
483 PL_retstack_ix = 0;
484 PL_retstack_max = 8;
485}
486
487/*
488 * destroy the stacks, the callchain etc...
489 * still there is a memleak of 128 bytes...
490 */
491STATIC void
492destroy_stacks(pTHX)
493{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next;
507
508 while (PL_curstackinfo)
509 {
510 PERL_SI *p = PL_curstackinfo->si_prev;
511
512 {
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 }
523
524 Safefree(PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo);
526 PL_curstackinfo = p;
527 }
528
529 Safefree(PL_tmps_stack);
530 Safefree(PL_markstack);
531 Safefree(PL_scopestack);
532 Safefree(PL_savestack);
533 Safefree(PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#if HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599
600 coro_init_stacks (aTHX);
601 /*PL_curcop = 0;*/
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP);
613 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616 if (SvTRUE (ERRSV))
617 croak (NULL);
618 else
619 croak ("FATAL: CCTXT coroutine returned!");
620 }
621 else
622 {
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 {
682 SAVE (prev, flags);
683 LOAD (next);
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 {
692 if (!prev->stack)
693 allocate_stack (prev, 0);
694 else if (prev->cursp != stacklevel
695 && prev->stack->usecnt > 1)
696 {
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 }
714
715 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else
719 {
720 SAVE (prev, -1); /* first get rid of the old state */
721
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 {
729 setup_coro (next);
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 }
746 else
747 setup_coro (next);
748 }
749
750 /*
751 * xnext is now either prev or next, depending on wether
752 * we switched the c stack or not. that's why i use a global
753 * variable, that should become thread-specific at one point.
754 */
755 xnext->cursp = stacklevel;
756 }
757}
758
759static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766 if (!he)
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779}
780
781static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags)
783{
784 transfer(aTHX_
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789 309
790/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
791 311
792#define PRIO_MAX 3 312#define PRIO_MAX 3
793#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
795#define PRIO_LOW -1 315#define PRIO_LOW -1
796#define PRIO_IDLE -3 316#define PRIO_IDLE -3
797#define PRIO_MIN -4 317#define PRIO_MIN -4
798 318
799/* for Coro.pm */ 319/* for Coro.pm */
800static GV *coro_current, *coro_idle; 320static SV *coro_current;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
802static 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
803 326
804static void 327/** lowlevel stuff **********************************************************/
805coro_enq (SV *sv) 328
329static SV *
330coro_get_sv (pTHX_ const char *name, int create)
806{ 331{
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}
338
339static AV *
340coro_get_av (pTHX_ const char *name, int create)
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}
348
349static HV *
350coro_get_hv (pTHX_ const char *name, int create)
351{
352#if PERL_VERSION_ATLEAST (5,10,0)
353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
354 get_hv (name, create);
355#endif
356 return get_hv (name, create);
357}
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
370 return cv;
371}
372
373/*****************************************************************************/
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)
394{
395 HV *stash;
396 MAGIC *mg;
397
807 if (SvROK (sv)) 398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
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");
808 { 410 }
809 SV *hv = SvRV (sv); 411
810 if (SvTYPE (hv) == SVt_PVHV) 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 */
811 { 456 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 457 /* we try to be extra-careful here */
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 458 AV *av = (AV *)AvARRAY (padlist)[i--];
459 I32 j = AvFILLp (av);
814 460
815 prio = prio > PRIO_MAX ? PRIO_MAX 461 while (j >= 0)
816 : prio < PRIO_MIN ? PRIO_MIN 462 SvREFCNT_dec (AvARRAY (av)[j--]);
817 : prio;
818 463
819 av_push (coro_ready [prio - PRIO_MIN], sv); 464 AvFILLp (av) = -1;
820 coro_nready++; 465 SvREFCNT_dec (av);
821
822 return;
823 } 466 }
467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
471 SvREFCNT_dec ((SV*)padlist);
472 }
473}
474
475static int
476coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
477{
478 AV *padlist;
479 AV *av = (AV *)mg->mg_obj;
480
481 /* casting is fun. */
482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
483 free_padlist (aTHX_ padlist);
484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
487 return 0;
488}
489
490static MGVTBL coro_cv_vtbl = {
491 0, 0, 0, 0,
492 coro_cv_free
493};
494
495/* the next two functions merely cache the padlists */
496static void
497get_padlist (pTHX_ CV *cv)
498{
499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
501
502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
504 else
505 {
506#if CORO_PREFER_PERL_FUNCTIONS
507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
509 CV *cp = Perl_cv_clone (aTHX_ cv);
510 CvPADLIST (cv) = CvPADLIST (cp);
511 CvPADLIST (cp) = 0;
512 SvREFCNT_dec (cp);
513#else
514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
515#endif
824 } 516 }
825
826 croak ("Coro::ready tried to enqueue something that is not a coroutine");
827} 517}
828 518
519static void
520put_padlist (pTHX_ CV *cv)
521{
522 MAGIC *mg = CORO_MAGIC_cv (cv);
523 AV *av;
524
525 if (expect_false (!mg))
526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
527
528 av = (AV *)mg->mg_obj;
529
530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
531 av_extend (av, AvFILLp (av) + 1);
532
533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
534}
535
536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
542load_perl (pTHX_ Coro__State c)
543{
544 perl_slots *slot = c->slot;
545 c->slot = 0;
546
547 PL_mainstack = c->mainstack;
548
549 GvSV (PL_defgv) = slot->defsv;
550 GvAV (PL_defgv) = slot->defav;
551 GvSV (PL_errgv) = slot->errsv;
552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
554
555 #define VAR(name,type) PL_ ## name = slot->name;
556 # include "state.h"
557 #undef VAR
558
559 {
560 dSP;
561
562 CV *cv;
563
564 /* now do the ugly restore mess */
565 while (expect_true (cv = (CV *)POPs))
566 {
567 put_padlist (aTHX_ cv); /* mark this padlist as available */
568 CvDEPTH (cv) = PTR2IV (POPs);
569 CvPADLIST (cv) = (AV *)POPs;
570 }
571
572 PUTBACK;
573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
585}
586
587static void
588save_perl (pTHX_ Coro__State c)
589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
601 {
602 dSP;
603 I32 cxix = cxstack_ix;
604 PERL_CONTEXT *ccstk = cxstack;
605 PERL_SI *top_si = PL_curstackinfo;
606
607 /*
608 * the worst thing you can imagine happens first - we have to save
609 * (and reinitialize) all cv's in the whole callchain :(
610 */
611
612 XPUSHs (Nullsv);
613 /* this loop was inspired by pp_caller */
614 for (;;)
615 {
616 while (expect_true (cxix >= 0))
617 {
618 PERL_CONTEXT *cx = &ccstk[cxix--];
619
620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
621 {
622 CV *cv = cx->blk_sub.cv;
623
624 if (expect_true (CvDEPTH (cv)))
625 {
626 EXTEND (SP, 3);
627 PUSHs ((SV *)CvPADLIST (cv));
628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
629 PUSHs ((SV *)cv);
630
631 CvDEPTH (cv) = 0;
632 get_padlist (aTHX_ cv);
633 }
634 }
635 }
636
637 if (expect_true (top_si->si_type == PERLSI_MAIN))
638 break;
639
640 top_si = top_si->si_prev;
641 ccstk = top_si->si_cxstack;
642 cxix = top_si->si_cxix;
643 }
644
645 PUTBACK;
646 }
647
648 /* allocate some space on the context stack for our purposes */
649 /* we manually unroll here, as usually 2 slots is enough */
650 if (SLOT_COUNT >= 1) CXINC;
651 if (SLOT_COUNT >= 2) CXINC;
652 if (SLOT_COUNT >= 3) CXINC;
653 {
654 int i;
655 for (i = 3; i < SLOT_COUNT; ++i)
656 CXINC;
657 }
658 cxstack_ix -= SLOT_COUNT; /* undo allocation */
659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
665 slot->defav = GvAV (PL_defgv);
666 slot->defsv = DEFSV;
667 slot->errsv = ERRSV;
668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675}
676
677/*
678 * allocate various perl stacks. This is almost an exact copy
679 * of perl.c:init_stacks, except that it uses less memory
680 * on the (sometimes correct) assumption that coroutines do
681 * not usually need a lot of stackspace.
682 */
683#if CORO_PREFER_PERL_FUNCTIONS
684# define coro_init_stacks(thx) init_stacks ()
685#else
686static void
687coro_init_stacks (pTHX)
688{
689 PL_curstackinfo = new_stackinfo(32, 8);
690 PL_curstackinfo->si_type = PERLSI_MAIN;
691 PL_curstack = PL_curstackinfo->si_stack;
692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
693
694 PL_stack_base = AvARRAY(PL_curstack);
695 PL_stack_sp = PL_stack_base;
696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
697
698 New(50,PL_tmps_stack,32,SV*);
699 PL_tmps_floor = -1;
700 PL_tmps_ix = -1;
701 PL_tmps_max = 32;
702
703 New(54,PL_markstack,16,I32);
704 PL_markstack_ptr = PL_markstack;
705 PL_markstack_max = PL_markstack + 16;
706
707#ifdef SET_MARK_OFFSET
708 SET_MARK_OFFSET;
709#endif
710
711 New(54,PL_scopestack,8,I32);
712 PL_scopestack_ix = 0;
713 PL_scopestack_max = 8;
714
715 New(54,PL_savestack,24,ANY);
716 PL_savestack_ix = 0;
717 PL_savestack_max = 24;
718
719#if !PERL_VERSION_ATLEAST (5,10,0)
720 New(54,PL_retstack,4,OP*);
721 PL_retstack_ix = 0;
722 PL_retstack_max = 4;
723#endif
724}
725#endif
726
727/*
728 * destroy the stacks, the callchain etc...
729 */
730static void
731coro_destruct_stacks (pTHX)
732{
733 while (PL_curstackinfo->si_next)
734 PL_curstackinfo = PL_curstackinfo->si_next;
735
736 while (PL_curstackinfo)
737 {
738 PERL_SI *p = PL_curstackinfo->si_prev;
739
740 if (!IN_DESTRUCT)
741 SvREFCNT_dec (PL_curstackinfo->si_stack);
742
743 Safefree (PL_curstackinfo->si_cxstack);
744 Safefree (PL_curstackinfo);
745 PL_curstackinfo = p;
746 }
747
748 Safefree (PL_tmps_stack);
749 Safefree (PL_markstack);
750 Safefree (PL_scopestack);
751 Safefree (PL_savestack);
752#if !PERL_VERSION_ATLEAST (5,10,0)
753 Safefree (PL_retstack);
754#endif
755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
766static size_t
767coro_rss (pTHX_ struct coro *coro)
768{
769 size_t rss = sizeof (*coro);
770
771 if (coro->mainstack)
772 {
773 if (coro->flags & CF_RUNNING)
774 {
775 #define SYM(sym) PL_ ## sym
776 CORO_RSS;
777 #undef SYM
778 }
779 else
780 {
781 #define SYM(sym) coro->slot->sym
782 CORO_RSS;
783 #undef SYM
784 }
785 }
786
787 return rss;
788}
789
790/** coroutine stack handling ************************************************/
791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
901coro_setup (pTHX_ struct coro *coro)
902{
903 /*
904 * emulate part of the perl startup here.
905 */
906 coro_init_stacks (aTHX);
907
908 PL_runops = RUNOPS_DEFAULT;
909 PL_curcop = &PL_compiling;
910 PL_in_eval = EVAL_NULL;
911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
915 PL_curpm = 0;
916 PL_curpad = 0;
917 PL_localizing = 0;
918 PL_dirty = 0;
919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
928
929 GvSV (PL_defgv) = newSV (0);
930 GvAV (PL_defgv) = coro->args; coro->args = 0;
931 GvSV (PL_errgv) = newSV (0);
932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
934 PL_rs = newSVsv (GvSV (irsgv));
935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
936
937 {
938 dSP;
939 UNOP myop;
940
941 Zero (&myop, 1, UNOP);
942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
944 myop.op_flags = OPf_WANT_VOID;
945
946 PUSHMARK (SP);
947 PUSHs ((SV *)coro->startcv);
948 PUTBACK;
949 PL_op = (OP *)&myop;
950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
951 }
952
953 /* this newly created coroutine might be run on an existing cctx which most
954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
971static void
972coro_unwind_stacks (pTHX)
973{
974 if (!IN_DESTRUCT)
975 {
976 /* restore all saved variables and stuff */
977 LEAVE_SCOPE (0);
978 assert (PL_tmps_floor == -1);
979
980 /* free all temporaries */
981 FREETMPS;
982 assert (PL_tmps_ix == -1);
983
984 /* unwind all extra stacks */
985 POPSTACK_TO (PL_mainstack);
986
987 /* unwind main stack */
988 dounwind (-1);
989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
996
997 SvREFCNT_dec (GvSV (PL_defgv));
998 SvREFCNT_dec (GvAV (PL_defgv));
999 SvREFCNT_dec (GvSV (PL_errgv));
1000 SvREFCNT_dec (PL_defoutgv);
1001 SvREFCNT_dec (PL_rs);
1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
1004
1005 SvREFCNT_dec (PL_diehook);
1006 SvREFCNT_dec (PL_warnhook);
1007
1008 SvREFCNT_dec (coro->saved_deffh);
1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
1012
1013 coro_destruct_stacks (aTHX);
1014}
1015
1016INLINE void
1017free_coro_mortal (pTHX)
1018{
1019 if (expect_true (coro_mortal))
1020 {
1021 SvREFCNT_dec (coro_mortal);
1022 coro_mortal = 0;
1023 }
1024}
1025
1026static int
1027runops_trace (pTHX)
1028{
1029 COP *oldcop = 0;
1030 int oldcxix = -2;
1031
1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1033 {
1034 PERL_ASYNC_CHECK ();
1035
1036 if (cctx_current->flags & CC_TRACE_ALL)
1037 {
1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1039 {
1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1041 SV **bot, **top;
1042 AV *av = newAV (); /* return values */
1043 SV **cb;
1044 dSP;
1045
1046 GV *gv = CvGV (cx->blk_sub.cv);
1047 SV *fullname = sv_2mortal (newSV (0));
1048 if (isGV (gv))
1049 gv_efullname3 (fullname, gv, 0);
1050
1051 bot = PL_stack_base + cx->blk_oldsp + 1;
1052 top = cx->blk_gimme == G_ARRAY ? SP + 1
1053 : cx->blk_gimme == G_SCALAR ? bot + 1
1054 : bot;
1055
1056 av_extend (av, top - bot);
1057 while (bot < top)
1058 av_push (av, SvREFCNT_inc_NN (*bot++));
1059
1060 PL_runops = RUNOPS_DEFAULT;
1061 ENTER;
1062 SAVETMPS;
1063 EXTEND (SP, 3);
1064 PUSHMARK (SP);
1065 PUSHs (&PL_sv_no);
1066 PUSHs (fullname);
1067 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1068 PUTBACK;
1069 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1070 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1071 SPAGAIN;
1072 FREETMPS;
1073 LEAVE;
1074 PL_runops = runops_trace;
1075 }
1076
1077 if (oldcop != PL_curcop)
1078 {
1079 oldcop = PL_curcop;
1080
1081 if (PL_curcop != &PL_compiling)
1082 {
1083 SV **cb;
1084
1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1086 {
1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1088
1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1090 {
1091 dSP;
1092 GV *gv = CvGV (cx->blk_sub.cv);
1093 SV *fullname = sv_2mortal (newSV (0));
1094
1095 if (isGV (gv))
1096 gv_efullname3 (fullname, gv, 0);
1097
1098 PL_runops = RUNOPS_DEFAULT;
1099 ENTER;
1100 SAVETMPS;
1101 EXTEND (SP, 3);
1102 PUSHMARK (SP);
1103 PUSHs (&PL_sv_yes);
1104 PUSHs (fullname);
1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1106 PUTBACK;
1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1109 SPAGAIN;
1110 FREETMPS;
1111 LEAVE;
1112 PL_runops = runops_trace;
1113 }
1114
1115 oldcxix = cxstack_ix;
1116 }
1117
1118 if (cctx_current->flags & CC_TRACE_LINE)
1119 {
1120 dSP;
1121
1122 PL_runops = RUNOPS_DEFAULT;
1123 ENTER;
1124 SAVETMPS;
1125 EXTEND (SP, 3);
1126 PL_runops = RUNOPS_DEFAULT;
1127 PUSHMARK (SP);
1128 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1129 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1130 PUTBACK;
1131 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1132 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1133 SPAGAIN;
1134 FREETMPS;
1135 LEAVE;
1136 PL_runops = runops_trace;
1137 }
1138 }
1139 }
1140 }
1141 }
1142
1143 TAINT_NOT;
1144 return 0;
1145}
1146
1147static struct CoroSLF cctx_ssl_frame;
1148
1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1164static void NOINLINE
1165cctx_prepare (pTHX)
1166{
1167 PL_top_env = &PL_start_env;
1168
1169 if (cctx_current->flags & CC_TRACE)
1170 PL_runops = runops_trace;
1171
1172 /* we already must be executing an SLF op, there is no other valid way
1173 * that can lead to creation of a new cctx */
1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1176
1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1178 cctx_ssl_frame = slf_frame;
1179
1180 slf_frame.prepare = slf_prepare_set_stacklevel;
1181 slf_frame.check = slf_check_set_stacklevel;
1182}
1183
1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
1189}
1190
1191/*
1192 * this is a _very_ stripped down perl interpreter ;)
1193 */
1194static void
1195cctx_run (void *arg)
1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
1203 dTHX;
1204
1205 /* normally we would need to skip the entersub here */
1206 /* not doing so will re-execute it, which is exactly what we want */
1207 /* PL_nop = PL_nop->op_next */
1208
1209 /* inject a fake subroutine call to cctx_init */
1210 cctx_prepare (aTHX);
1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
1215 /* somebody or something will hit me for both perl_run and PL_restartop */
1216 PL_restartop = PL_op;
1217 perl_run (PL_curinterp);
1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
1224 * If perl-run returns we assume exit() was being called or the coro
1225 * fell off the end, which seems to be the only valid (non-bug)
1226 * reason for perl_run to return. We try to exit by jumping to the
1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
1231 */
1232 PL_top_env = main_top_env;
1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
1235}
1236
1237static coro_cctx *
1238cctx_new ()
1239{
1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
1269 void *stack_start;
1270 size_t stack_size;
1271
1272#if HAVE_MMAP
1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1274 /* mmap supposedly does allocate-on-write for us */
1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1276
1277 if (cctx->sptr != (void *)-1)
1278 {
1279 #if CORO_STACKGUARD
1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1281 #endif
1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1284 cctx->flags |= CC_MAPPED;
1285 }
1286 else
1287#endif
1288 {
1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1290 New (0, cctx->sptr, cctx_stacksize, long);
1291
1292 if (!cctx->sptr)
1293 {
1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1295 _exit (EXIT_FAILURE);
1296 }
1297
1298 stack_start = cctx->sptr;
1299 stack_size = cctx->ssize;
1300 }
1301
1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1307
1308 return cctx;
1309}
1310
1311static void
1312cctx_destroy (coro_cctx *cctx)
1313{
1314 if (!cctx)
1315 return;
1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
1325 #if CORO_USE_VALGRIND
1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1327 #endif
1328
1329#if HAVE_MMAP
1330 if (cctx->flags & CC_MAPPED)
1331 munmap (cctx->sptr, cctx->ssize);
1332 else
1333#endif
1334 Safefree (cctx->sptr);
1335 }
1336
1337 Safefree (cctx);
1338}
1339
1340/* wether this cctx should be destructed */
1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1342
1343static coro_cctx *
1344cctx_get (pTHX)
1345{
1346 while (expect_true (cctx_first))
1347 {
1348 coro_cctx *cctx = cctx_first;
1349 cctx_first = cctx->next;
1350 --cctx_idle;
1351
1352 if (expect_true (!CCTX_EXPIRED (cctx)))
1353 return cctx;
1354
1355 cctx_destroy (cctx);
1356 }
1357
1358 return cctx_new_run ();
1359}
1360
1361static void
1362cctx_put (coro_cctx *cctx)
1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
1366 /* free another cctx if overlimit */
1367 if (expect_false (cctx_idle >= cctx_max_idle))
1368 {
1369 coro_cctx *first = cctx_first;
1370 cctx_first = first->next;
1371 --cctx_idle;
1372
1373 cctx_destroy (first);
1374 }
1375
1376 ++cctx_idle;
1377 cctx->next = cctx_first;
1378 cctx_first = cctx;
1379}
1380
1381/** coroutine switching *****************************************************/
1382
1383static void
1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1388 if (expect_true (prev != next))
1389 {
1390 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1392
1393 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1395
1396#if !PERL_VERSION_ATLEAST (5,10,0)
1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1399#endif
1400 }
1401}
1402
1403/* always use the TRANSFER macro */
1404static void NOINLINE /* noinline so we have a fixed stackframe */
1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1406{
1407 dSTACKLEVEL;
1408
1409 /* sometimes transfer is only called to set idle_sp */
1410 if (expect_false (!prev))
1411 {
1412 cctx_current->idle_sp = STACKLEVEL;
1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1414 }
1415 else if (expect_true (prev != next))
1416 {
1417 coro_cctx *cctx_prev;
1418
1419 if (expect_false (prev->flags & CF_NEW))
1420 {
1421 /* create a new empty/source context */
1422 prev->flags &= ~CF_NEW;
1423 prev->flags |= CF_RUNNING;
1424 }
1425
1426 prev->flags &= ~CF_RUNNING;
1427 next->flags |= CF_RUNNING;
1428
1429 /* first get rid of the old state */
1430 save_perl (aTHX_ prev);
1431
1432 if (expect_false (next->flags & CF_NEW))
1433 {
1434 /* need to start coroutine */
1435 next->flags &= ~CF_NEW;
1436 /* setup coroutine call */
1437 coro_setup (aTHX_ next);
1438 }
1439 else
1440 load_perl (aTHX_ next);
1441
1442 /* possibly untie and reuse the cctx */
1443 if (expect_true (
1444 cctx_current->idle_sp == STACKLEVEL
1445 && !(cctx_current->flags & CC_TRACE)
1446 && !force_cctx
1447 ))
1448 {
1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1450 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1451
1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1455 if (expect_true (!next->cctx))
1456 next->cctx = cctx_get (aTHX);
1457
1458 cctx_put (cctx_current);
1459 }
1460 else
1461 prev->cctx = cctx_current;
1462
1463 ++next->usecount;
1464
1465 cctx_prev = cctx_current;
1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1467
1468 next->cctx = 0;
1469
1470 if (expect_false (cctx_prev != cctx_current))
1471 {
1472 cctx_prev->top_env = PL_top_env;
1473 PL_top_env = cctx_current->top_env;
1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1475 }
1476
1477 transfer_tail (aTHX);
1478 }
1479}
1480
1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1483
1484/** high level stuff ********************************************************/
1485
1486static int
1487coro_state_destroy (pTHX_ struct coro *coro)
1488{
1489 if (coro->flags & CF_DESTROYED)
1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
1494
1495 coro->flags |= CF_DESTROYED;
1496
1497 if (coro->flags & CF_READY)
1498 {
1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
1500 /* alternative: look through all ready queues and remove the coro */
1501 --coro_nready;
1502 }
1503 else
1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1505
1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
1510 {
1511 struct coro *current = SvSTATE_current;
1512
1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1514
1515 save_perl (aTHX_ current);
1516 load_perl (aTHX_ coro);
1517
1518 coro_destruct_perl (aTHX_ coro);
1519
1520 load_perl (aTHX_ current);
1521
1522 coro->slot = 0;
1523 }
1524
1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
1529
1530 if (coro->next) coro->next->prev = coro->prev;
1531 if (coro->prev) coro->prev->next = coro->next;
1532 if (coro == coro_first) coro_first = coro->next;
1533
1534 return 1;
1535}
1536
1537static int
1538coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1539{
1540 struct coro *coro = (struct coro *)mg->mg_ptr;
1541 mg->mg_ptr = 0;
1542
1543 coro->hv = 0;
1544
1545 if (--coro->refcnt < 0)
1546 {
1547 coro_state_destroy (aTHX_ coro);
1548 Safefree (coro);
1549 }
1550
1551 return 0;
1552}
1553
1554static int
1555coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1556{
1557 struct coro *coro = (struct coro *)mg->mg_ptr;
1558
1559 ++coro->refcnt;
1560
1561 return 0;
1562}
1563
1564static MGVTBL coro_state_vtbl = {
1565 0, 0, 0, 0,
1566 coro_state_free,
1567 0,
1568#ifdef MGf_DUP
1569 coro_state_dup,
1570#else
1571# define MGf_DUP 0
1572#endif
1573};
1574
1575static void
1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1577{
1578 ta->prev = SvSTATE (prev_sv);
1579 ta->next = SvSTATE (next_sv);
1580 TRANSFER_CHECK (*ta);
1581}
1582
1583static void
1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1585{
1586 struct coro_transfer_args ta;
1587
1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1589 TRANSFER (ta, 1);
1590}
1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
829static SV * 1600static SV *
830coro_deq (int min_prio) 1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
831{ 1602{
832 int prio = PRIO_MAX - PRIO_MIN; 1603 CV *cv = (CV *)newSV (0);
833 1604
834 min_prio -= PRIO_MIN; 1605 sv_upgrade ((SV *)cv, SVt_PVCV);
835 if (min_prio < 0)
836 min_prio = 0;
837 1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1613}
1614
1615/** Coro ********************************************************************/
1616
1617INLINE void
1618coro_enq (pTHX_ struct coro *coro)
1619{
1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1621
1622 SvREFCNT_inc_NN (coro->hv);
1623
1624 coro->next_ready = 0;
1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1626 ready [1] = coro;
1627}
1628
1629INLINE struct coro *
1630coro_deq (pTHX)
1631{
1632 int prio;
1633
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
839 if (av_len (coro_ready[prio]) >= 0) 1635 {
1636 struct coro **ready = coro_ready [prio];
1637
1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1645
1646 return 0;
1647}
1648
1649static int
1650api_ready (pTHX_ SV *coro_sv)
1651{
1652 struct coro *coro;
1653 SV *sv_hook;
1654 void (*xs_hook)(void);
1655
1656 coro = SvSTATE (coro_sv);
1657
1658 if (coro->flags & CF_READY)
1659 return 0;
1660
1661 coro->flags |= CF_READY;
1662
1663 sv_hook = coro_nready ? 0 : coro_readyhook;
1664 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1665
1666 coro_enq (aTHX_ coro);
1667 ++coro_nready;
1668
1669 if (sv_hook)
1670 {
1671 dSP;
1672
1673 ENTER;
1674 SAVETMPS;
1675
1676 PUSHMARK (SP);
1677 PUTBACK;
1678 call_sv (sv_hook, G_VOID | G_DISCARD);
1679
1680 FREETMPS;
1681 LEAVE;
1682 }
1683
1684 if (xs_hook)
1685 xs_hook ();
1686
1687 return 1;
1688}
1689
1690static int
1691api_is_ready (pTHX_ SV *coro_sv)
1692{
1693 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1694}
1695
1696/* expects to own a reference to next->hv */
1697INLINE void
1698prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1699{
1700 SV *prev_sv = SvRV (coro_current);
1701
1702 ta->prev = SvSTATE_hv (prev_sv);
1703 ta->next = next;
1704
1705 TRANSFER_CHECK (*ta);
1706
1707 SvRV_set (coro_current, (SV *)next->hv);
1708
1709 free_coro_mortal (aTHX);
1710 coro_mortal = prev_sv;
1711}
1712
1713static void
1714prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1715{
1716 for (;;)
1717 {
1718 struct coro *next = coro_deq (aTHX);
1719
1720 if (expect_true (next))
1721 {
1722 /* cannot transfer to destroyed coros, skip and look for next */
1723 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1724 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1725 else
1726 {
1727 next->flags &= ~CF_READY;
1728 --coro_nready;
1729
1730 prepare_schedule_to (aTHX_ ta, next);
1731 break;
1732 }
1733 }
1734 else
1735 {
1736 /* nothing to schedule: call the idle handler */
1737 if (SvROK (sv_idle)
1738 && SvOBJECT (SvRV (sv_idle)))
1739 {
1740 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1741 api_ready (aTHX_ SvRV (sv_idle));
1742 --coro_nready;
1743 }
1744 else
1745 {
1746 dSP;
1747
1748 ENTER;
1749 SAVETMPS;
1750
1751 PUSHMARK (SP);
1752 PUTBACK;
1753 call_sv (sv_idle, G_VOID | G_DISCARD);
1754
1755 FREETMPS;
1756 LEAVE;
1757 }
1758 }
1759 }
1760}
1761
1762INLINE void
1763prepare_cede (pTHX_ struct coro_transfer_args *ta)
1764{
1765 api_ready (aTHX_ coro_current);
1766 prepare_schedule (aTHX_ ta);
1767}
1768
1769INLINE void
1770prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1771{
1772 SV *prev = SvRV (coro_current);
1773
1774 if (coro_nready)
1775 {
1776 prepare_schedule (aTHX_ ta);
1777 api_ready (aTHX_ prev);
1778 }
1779 else
1780 prepare_nop (aTHX_ ta);
1781}
1782
1783static void
1784api_schedule (pTHX)
1785{
1786 struct coro_transfer_args ta;
1787
1788 prepare_schedule (aTHX_ &ta);
1789 TRANSFER (ta, 1);
1790}
1791
1792static void
1793api_schedule_to (pTHX_ SV *coro_sv)
1794{
1795 struct coro_transfer_args ta;
1796 struct coro *next = SvSTATE (coro_sv);
1797
1798 SvREFCNT_inc_NN (coro_sv);
1799 prepare_schedule_to (aTHX_ &ta, next);
1800}
1801
1802static int
1803api_cede (pTHX)
1804{
1805 struct coro_transfer_args ta;
1806
1807 prepare_cede (aTHX_ &ta);
1808
1809 if (expect_true (ta.prev != ta.next))
1810 {
1811 TRANSFER (ta, 1);
1812 return 1;
1813 }
1814 else
1815 return 0;
1816}
1817
1818static int
1819api_cede_notself (pTHX)
1820{
1821 if (coro_nready)
1822 {
1823 struct coro_transfer_args ta;
1824
1825 prepare_cede_notself (aTHX_ &ta);
1826 TRANSFER (ta, 1);
1827 return 1;
1828 }
1829 else
1830 return 0;
1831}
1832
1833static void
1834api_trace (pTHX_ SV *coro_sv, int flags)
1835{
1836 struct coro *coro = SvSTATE (coro_sv);
1837
1838 if (coro->flags & CF_RUNNING)
1839 croak ("cannot enable tracing on a running coroutine, caught");
1840
1841 if (flags & CC_TRACE)
1842 {
1843 if (!coro->cctx)
1844 coro->cctx = cctx_new_run ();
1845 else if (!(coro->cctx->flags & CC_TRACE))
1846 croak ("cannot enable tracing on coroutine with custom stack, caught");
1847
1848 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1849 }
1850 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1851 {
1852 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1853
1854 if (coro->flags & CF_RUNNING)
1855 PL_runops = RUNOPS_DEFAULT;
1856 else
1857 coro->slot->runops = RUNOPS_DEFAULT;
1858 }
1859}
1860
1861static void
1862coro_call_on_destroy (pTHX_ struct coro *coro)
1863{
1864 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1865 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1866
1867 if (on_destroyp)
1868 {
1869 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1870
1871 while (AvFILLp (on_destroy) >= 0)
1872 {
1873 dSP; /* don't disturb outer sp */
1874 SV *cb = av_pop (on_destroy);
1875
1876 PUSHMARK (SP);
1877
1878 if (statusp)
1879 {
1880 int i;
1881 AV *status = (AV *)SvRV (*statusp);
1882 EXTEND (SP, AvFILLp (status) + 1);
1883
1884 for (i = 0; i <= AvFILLp (status); ++i)
1885 PUSHs (AvARRAY (status)[i]);
1886 }
1887
1888 PUTBACK;
1889 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1890 }
1891 }
1892}
1893
1894static void
1895slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1896{
1897 int i;
1898 HV *hv = (HV *)SvRV (coro_current);
1899 AV *av = newAV ();
1900
1901 av_extend (av, items - 1);
1902 for (i = 0; i < items; ++i)
1903 av_push (av, SvREFCNT_inc_NN (arg [i]));
1904
1905 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1906
1907 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1908 api_ready (aTHX_ sv_manager);
1909
1910 frame->prepare = prepare_schedule;
1911 frame->check = slf_check_repeat;
1912
1913 /* as a minor optimisation, we could unwind all stacks here */
1914 /* but that puts extra pressure on pp_slf, and is not worth much */
1915 /*coro_unwind_stacks (aTHX);*/
1916}
1917
1918/*****************************************************************************/
1919/* async pool handler */
1920
1921static int
1922slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1923{
1924 HV *hv = (HV *)SvRV (coro_current);
1925 struct coro *coro = (struct coro *)frame->data;
1926
1927 if (!coro->invoke_cb)
1928 return 1; /* loop till we have invoke */
1929 else
1930 {
1931 hv_store (hv, "desc", sizeof ("desc") - 1,
1932 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1933
1934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1935
840 { 1936 {
841 coro_nready--; 1937 dSP;
842 return av_shift (coro_ready[prio]); 1938 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1939 PUTBACK;
843 } 1940 }
844 1941
1942 SvREFCNT_dec (GvAV (PL_defgv));
1943 GvAV (PL_defgv) = coro->invoke_av;
1944 coro->invoke_av = 0;
1945
1946 return 0;
1947 }
1948}
1949
1950static void
1951slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1952{
1953 HV *hv = (HV *)SvRV (coro_current);
1954 struct coro *coro = SvSTATE_hv ((SV *)hv);
1955
1956 if (expect_true (coro->saved_deffh))
1957 {
1958 /* subsequent iteration */
1959 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1960 coro->saved_deffh = 0;
1961
1962 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1963 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1964 {
1965 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1966 coro->invoke_av = newAV ();
1967
1968 frame->prepare = prepare_nop;
1969 }
1970 else
1971 {
1972 av_clear (GvAV (PL_defgv));
1973 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1974
1975 coro->prio = 0;
1976
1977 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1978 api_trace (aTHX_ coro_current, 0);
1979
1980 frame->prepare = prepare_schedule;
1981 av_push (av_async_pool, SvREFCNT_inc (hv));
1982 }
1983 }
1984 else
1985 {
1986 /* first iteration, simply fall through */
1987 frame->prepare = prepare_nop;
1988 }
1989
1990 frame->check = slf_check_pool_handler;
1991 frame->data = (void *)coro;
1992}
1993
1994/*****************************************************************************/
1995/* rouse callback */
1996
1997#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1998
1999static void
2000coro_rouse_callback (pTHX_ CV *cv)
2001{
2002 dXSARGS;
2003 SV *data = (SV *)GENSUB_ARG;
2004
2005 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2006 {
2007 /* first call, set args */
2008 SV *coro = SvRV (data);
2009 AV *av = newAV ();
2010
2011 SvRV_set (data, (SV *)av);
2012
2013 /* better take a full copy of the arguments */
2014 while (items--)
2015 av_store (av, items, newSVsv (ST (items)));
2016
2017 api_ready (aTHX_ coro);
2018 SvREFCNT_dec (coro);
2019 }
2020
2021 XSRETURN_EMPTY;
2022}
2023
2024static int
2025slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2026{
2027 SV *data = (SV *)frame->data;
2028
2029 if (CORO_THROW)
2030 return 0;
2031
2032 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2033 return 1;
2034
2035 /* now push all results on the stack */
2036 {
2037 dSP;
2038 AV *av = (AV *)SvRV (data);
2039 int i;
2040
2041 EXTEND (SP, AvFILLp (av) + 1);
2042 for (i = 0; i <= AvFILLp (av); ++i)
2043 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2044
2045 /* we have stolen the elements, so set length to zero and free */
2046 AvFILLp (av) = -1;
2047 av_undef (av);
2048
2049 PUTBACK;
2050 }
2051
845 return 0; 2052 return 0;
846} 2053}
847 2054
848static void 2055static void
849api_ready (SV *coro) 2056slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
850{ 2057{
851 coro_enq (SvREFCNT_inc (coro)); 2058 SV *cb;
852}
853 2059
854static void 2060 if (items)
855api_schedule (int cede) 2061 cb = arg [0];
856{ 2062 else
857 SV *prev, *next; 2063 {
2064 struct coro *coro = SvSTATE_current;
858 2065
859 prev = GvSV (coro_current); 2066 if (!coro->rouse_cb)
2067 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
860 2068
861 if (cede) 2069 cb = sv_2mortal (coro->rouse_cb);
862 coro_enq (SvREFCNT_inc (prev)); 2070 coro->rouse_cb = 0;
2071 }
863 2072
864 next = coro_deq (PRIO_MIN); 2073 if (!SvROK (cb)
2074 || SvTYPE (SvRV (cb)) != SVt_PVCV
2075 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2076 croak ("Coro::rouse_wait called with illegal callback argument,");
865 2077
866 if (!next) 2078 {
867 next = SvREFCNT_inc (GvSV (coro_idle)); 2079 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2080 SV *data = (SV *)GENSUB_ARG;
868 2081
869 GvSV (coro_current) = SvREFCNT_inc (next); 2082 frame->data = (void *)data;
870 transfer (aTHX_ 2083 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 2084 frame->check = slf_check_rouse_wait;
872 sv_to_coro (next, "Coro::schedule", "next coroutine"), 2085 }
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2086}
2087
2088static SV *
2089coro_new_rouse_cb (pTHX)
2090{
2091 HV *hv = (HV *)SvRV (coro_current);
2092 struct coro *coro = SvSTATE_hv (hv);
2093 SV *data = newRV_inc ((SV *)hv);
2094 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2095
2096 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2097 SvREFCNT_dec (data); /* magicext increases the refcount */
2098
2099 SvREFCNT_dec (coro->rouse_cb);
2100 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2101
2102 return cb;
2103}
2104
2105/*****************************************************************************/
2106/* schedule-like-function opcode (SLF) */
2107
2108static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2109static const CV *slf_cv;
2110static SV **slf_argv;
2111static int slf_argc, slf_arga; /* count, allocated */
2112static I32 slf_ax; /* top of stack, for restore */
2113
2114/* this restores the stack in the case we patched the entersub, to */
2115/* recreate the stack frame as perl will on following calls */
2116/* since entersub cleared the stack */
2117static OP *
2118pp_restore (pTHX)
2119{
2120 int i;
2121 SV **SP = PL_stack_base + slf_ax;
2122
2123 PUSHMARK (SP);
2124
2125 EXTEND (SP, slf_argc + 1);
2126
2127 for (i = 0; i < slf_argc; ++i)
2128 PUSHs (sv_2mortal (slf_argv [i]));
2129
2130 PUSHs ((SV *)CvGV (slf_cv));
2131
2132 RETURNOP (slf_restore.op_first);
2133}
2134
2135static void
2136slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2137{
2138 SV **arg = (SV **)slf_frame.data;
2139
2140 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2141}
2142
2143static void
2144slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2145{
2146 if (items != 2)
2147 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2148
2149 frame->prepare = slf_prepare_transfer;
2150 frame->check = slf_check_nop;
2151 frame->data = (void *)arg; /* let's hope it will stay valid */
2152}
2153
2154static void
2155slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_nop;
2159}
2160
2161static void
2162slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2163{
2164 struct coro *next = (struct coro *)slf_frame.data;
2165
2166 SvREFCNT_inc_NN (next->hv);
2167 prepare_schedule_to (aTHX_ ta, next);
2168}
2169
2170static void
2171slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2172{
2173 if (!items)
2174 croak ("Coro::schedule_to expects a coroutine argument, caught");
2175
2176 frame->data = (void *)SvSTATE (arg [0]);
2177 frame->prepare = slf_prepare_schedule_to;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
2182slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2183{
2184 api_ready (aTHX_ SvRV (coro_current));
2185
2186 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2187}
2188
2189static void
2190slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 frame->prepare = prepare_cede;
2193 frame->check = slf_check_nop;
2194}
2195
2196static void
2197slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede_notself;
2200 frame->check = slf_check_nop;
2201}
2202
2203/*
2204 * these not obviously related functions are all rolled into one
2205 * function to increase chances that they all will call transfer with the same
2206 * stack offset
2207 * SLF stands for "schedule-like-function".
2208 */
2209static OP *
2210pp_slf (pTHX)
2211{
2212 I32 checkmark; /* mark SP to see how many elements check has pushed */
2213
2214 /* set up the slf frame, unless it has already been set-up */
2215 /* the latter happens when a new coro has been started */
2216 /* or when a new cctx was attached to an existing coroutine */
2217 if (expect_true (!slf_frame.prepare))
2218 {
2219 /* first iteration */
2220 dSP;
2221 SV **arg = PL_stack_base + TOPMARK + 1;
2222 int items = SP - arg; /* args without function object */
2223 SV *gv = *sp;
2224
2225 /* do a quick consistency check on the "function" object, and if it isn't */
2226 /* for us, divert to the real entersub */
2227 if (SvTYPE (gv) != SVt_PVGV
2228 || !GvCV (gv)
2229 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2230 return PL_ppaddr[OP_ENTERSUB](aTHX);
2231
2232 if (!(PL_op->op_flags & OPf_STACKED))
2233 {
2234 /* ampersand-form of call, use @_ instead of stack */
2235 AV *av = GvAV (PL_defgv);
2236 arg = AvARRAY (av);
2237 items = AvFILLp (av) + 1;
2238 }
2239
2240 /* now call the init function, which needs to set up slf_frame */
2241 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2242 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2243
2244 /* pop args */
2245 SP = PL_stack_base + POPMARK;
2246
2247 PUTBACK;
2248 }
2249
2250 /* now that we have a slf_frame, interpret it! */
2251 /* we use a callback system not to make the code needlessly */
2252 /* complicated, but so we can run multiple perl coros from one cctx */
2253
2254 do
2255 {
2256 struct coro_transfer_args ta;
2257
2258 slf_frame.prepare (aTHX_ &ta);
2259 TRANSFER (ta, 0);
2260
2261 checkmark = PL_stack_sp - PL_stack_base;
2262 }
2263 while (slf_frame.check (aTHX_ &slf_frame));
2264
2265 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2266
2267 /* exception handling */
2268 if (expect_false (CORO_THROW))
2269 {
2270 SV *exception = sv_2mortal (CORO_THROW);
2271
2272 CORO_THROW = 0;
2273 sv_setsv (ERRSV, exception);
2274 croak (0);
2275 }
2276
2277 /* return value handling - mostly like entersub */
2278 /* make sure we put something on the stack in scalar context */
2279 if (GIMME_V == G_SCALAR)
2280 {
2281 dSP;
2282 SV **bot = PL_stack_base + checkmark;
2283
2284 if (sp == bot) /* too few, push undef */
2285 bot [1] = &PL_sv_undef;
2286 else if (sp != bot + 1) /* too many, take last one */
2287 bot [1] = *sp;
2288
2289 SP = bot + 1;
2290
2291 PUTBACK;
2292 }
2293
2294 return NORMAL;
2295}
2296
2297static void
2298api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2299{
2300 int i;
2301 SV **arg = PL_stack_base + ax;
2302 int items = PL_stack_sp - arg + 1;
2303
2304 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2305
2306 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2307 && PL_op->op_ppaddr != pp_slf)
2308 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2309
2310 CvFLAGS (cv) |= CVf_SLF;
2311 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2312 slf_cv = cv;
2313
2314 /* we patch the op, and then re-run the whole call */
2315 /* we have to put the same argument on the stack for this to work */
2316 /* and this will be done by pp_restore */
2317 slf_restore.op_next = (OP *)&slf_restore;
2318 slf_restore.op_type = OP_CUSTOM;
2319 slf_restore.op_ppaddr = pp_restore;
2320 slf_restore.op_first = PL_op;
2321
2322 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2323
2324 if (PL_op->op_flags & OPf_STACKED)
2325 {
2326 if (items > slf_arga)
2327 {
2328 slf_arga = items;
2329 free (slf_argv);
2330 slf_argv = malloc (slf_arga * sizeof (SV *));
2331 }
2332
2333 slf_argc = items;
2334
2335 for (i = 0; i < items; ++i)
2336 slf_argv [i] = SvREFCNT_inc (arg [i]);
2337 }
2338 else
2339 slf_argc = 0;
2340
2341 PL_op->op_ppaddr = pp_slf;
2342 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2343
2344 PL_op = (OP *)&slf_restore;
2345}
2346
2347/*****************************************************************************/
2348/* dynamic wind */
2349
2350static void
2351on_enterleave_call (pTHX_ SV *cb)
2352{
2353 dSP;
2354
2355 PUSHSTACK;
2356
2357 PUSHMARK (SP);
2358 PUTBACK;
2359 call_sv (cb, G_VOID | G_DISCARD);
2360 SPAGAIN;
2361
2362 POPSTACK;
2363}
2364
2365static SV *
2366coro_avp_pop_and_free (pTHX_ AV **avp)
2367{
2368 AV *av = *avp;
2369 SV *res = av_pop (av);
2370
2371 if (AvFILLp (av) < 0)
2372 {
2373 *avp = 0;
2374 SvREFCNT_dec (av);
2375 }
2376
2377 return res;
2378}
2379
2380static void
2381coro_pop_on_enter (pTHX_ void *coro)
2382{
2383 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
874 SvREFCNT_dec (next); 2384 SvREFCNT_dec (cb);
2385}
2386
2387static void
2388coro_pop_on_leave (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2391 on_enterleave_call (aTHX_ sv_2mortal (cb));
2392}
2393
2394/*****************************************************************************/
2395/* PerlIO::cede */
2396
2397typedef struct
2398{
2399 PerlIOBuf base;
2400 NV next, every;
2401} PerlIOCede;
2402
2403static IV
2404PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2405{
2406 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2407
2408 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2409 self->next = nvtime () + self->every;
2410
2411 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2412}
2413
2414static SV *
2415PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2416{
2417 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2418
2419 return newSVnv (self->every);
2420}
2421
2422static IV
2423PerlIOCede_flush (pTHX_ PerlIO *f)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426 double now = nvtime ();
2427
2428 if (now >= self->next)
2429 {
2430 api_cede (aTHX);
2431 self->next = now + self->every;
2432 }
2433
2434 return PerlIOBuf_flush (aTHX_ f);
2435}
2436
2437static PerlIO_funcs PerlIO_cede =
2438{
2439 sizeof(PerlIO_funcs),
2440 "cede",
2441 sizeof(PerlIOCede),
2442 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2443 PerlIOCede_pushed,
2444 PerlIOBuf_popped,
2445 PerlIOBuf_open,
2446 PerlIOBase_binmode,
2447 PerlIOCede_getarg,
2448 PerlIOBase_fileno,
2449 PerlIOBuf_dup,
2450 PerlIOBuf_read,
2451 PerlIOBuf_unread,
2452 PerlIOBuf_write,
2453 PerlIOBuf_seek,
2454 PerlIOBuf_tell,
2455 PerlIOBuf_close,
2456 PerlIOCede_flush,
2457 PerlIOBuf_fill,
2458 PerlIOBase_eof,
2459 PerlIOBase_error,
2460 PerlIOBase_clearerr,
2461 PerlIOBase_setlinebuf,
2462 PerlIOBuf_get_base,
2463 PerlIOBuf_bufsiz,
2464 PerlIOBuf_get_ptr,
2465 PerlIOBuf_get_cnt,
2466 PerlIOBuf_set_ptrcnt,
2467};
2468
2469/*****************************************************************************/
2470/* Coro::Semaphore & Coro::Signal */
2471
2472static SV *
2473coro_waitarray_new (pTHX_ int count)
2474{
2475 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2476 AV *av = newAV ();
2477 SV **ary;
2478
2479 /* unfortunately, building manually saves memory */
2480 Newx (ary, 2, SV *);
2481 AvALLOC (av) = ary;
2482#if PERL_VERSION_ATLEAST (5,10,0)
2483 AvARRAY (av) = ary;
2484#else
2485 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2486 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2487 SvPVX ((SV *)av) = (char *)ary;
2488#endif
2489 AvMAX (av) = 1;
2490 AvFILLp (av) = 0;
2491 ary [0] = newSViv (count);
2492
2493 return newRV_noinc ((SV *)av);
2494}
2495
2496/* semaphore */
2497
2498static void
2499coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2500{
2501 SV *count_sv = AvARRAY (av)[0];
2502 IV count = SvIVX (count_sv);
2503
2504 count += adjust;
2505 SvIVX (count_sv) = count;
2506
2507 /* now wake up as many waiters as are expected to lock */
2508 while (count > 0 && AvFILLp (av) > 0)
2509 {
2510 SV *cb;
2511
2512 /* swap first two elements so we can shift a waiter */
2513 AvARRAY (av)[0] = AvARRAY (av)[1];
2514 AvARRAY (av)[1] = count_sv;
2515 cb = av_shift (av);
2516
2517 if (SvOBJECT (cb))
2518 {
2519 api_ready (aTHX_ cb);
2520 --count;
2521 }
2522 else if (SvTYPE (cb) == SVt_PVCV)
2523 {
2524 dSP;
2525 PUSHMARK (SP);
2526 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2527 PUTBACK;
2528 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2529 }
2530
2531 SvREFCNT_dec (cb);
2532 }
2533}
2534
2535static void
2536coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2537{
2538 /* call $sem->adjust (0) to possibly wake up some other waiters */
2539 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2540}
2541
2542static int
2543slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2544{
2545 AV *av = (AV *)frame->data;
2546 SV *count_sv = AvARRAY (av)[0];
2547
2548 /* if we are about to throw, don't actually acquire the lock, just throw */
2549 if (CORO_THROW)
2550 return 0;
2551 else if (SvIVX (count_sv) > 0)
2552 {
2553 SvSTATE_current->on_destroy = 0;
2554
2555 if (acquire)
2556 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2557 else
2558 coro_semaphore_adjust (aTHX_ av, 0);
2559
2560 return 0;
2561 }
2562 else
2563 {
2564 int i;
2565 /* if we were woken up but can't down, we look through the whole */
2566 /* waiters list and only add us if we aren't in there already */
2567 /* this avoids some degenerate memory usage cases */
2568
2569 for (i = 1; i <= AvFILLp (av); ++i)
2570 if (AvARRAY (av)[i] == SvRV (coro_current))
2571 return 1;
2572
2573 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2574 return 1;
2575 }
2576}
2577
2578static int
2579slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2580{
2581 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2582}
2583
2584static int
2585slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2586{
2587 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2588}
2589
2590static void
2591slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2592{
2593 AV *av = (AV *)SvRV (arg [0]);
2594
2595 if (SvIVX (AvARRAY (av)[0]) > 0)
2596 {
2597 frame->data = (void *)av;
2598 frame->prepare = prepare_nop;
2599 }
2600 else
2601 {
2602 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2603
2604 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2605 frame->prepare = prepare_schedule;
2606
2607 /* to avoid race conditions when a woken-up coro gets terminated */
2608 /* we arrange for a temporary on_destroy that calls adjust (0) */
2609 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2610 }
2611}
2612
2613static void
2614slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2617 frame->check = slf_check_semaphore_down;
2618}
2619
2620static void
2621slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 if (items >= 2)
2624 {
2625 /* callback form */
2626 AV *av = (AV *)SvRV (arg [0]);
2627 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2628
2629 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2630
2631 if (SvIVX (AvARRAY (av)[0]) > 0)
2632 coro_semaphore_adjust (aTHX_ av, 0);
2633
2634 frame->prepare = prepare_nop;
2635 frame->check = slf_check_nop;
2636 }
2637 else
2638 {
2639 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2640 frame->check = slf_check_semaphore_wait;
2641 }
2642}
2643
2644/* signal */
2645
2646static void
2647coro_signal_wake (pTHX_ AV *av, int count)
2648{
2649 SvIVX (AvARRAY (av)[0]) = 0;
2650
2651 /* now signal count waiters */
2652 while (count > 0 && AvFILLp (av) > 0)
2653 {
2654 SV *cb;
2655
2656 /* swap first two elements so we can shift a waiter */
2657 cb = AvARRAY (av)[0];
2658 AvARRAY (av)[0] = AvARRAY (av)[1];
2659 AvARRAY (av)[1] = cb;
2660
2661 cb = av_shift (av);
2662
2663 api_ready (aTHX_ cb);
2664 sv_setiv (cb, 0); /* signal waiter */
2665 SvREFCNT_dec (cb);
2666
2667 --count;
2668 }
2669}
2670
2671static int
2672slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2673{
2674 /* if we are about to throw, also stop waiting */
2675 return SvROK ((SV *)frame->data) && !CORO_THROW;
2676}
2677
2678static void
2679slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2680{
2681 AV *av = (AV *)SvRV (arg [0]);
2682
2683 if (SvIVX (AvARRAY (av)[0]))
2684 {
2685 SvIVX (AvARRAY (av)[0]) = 0;
2686 frame->prepare = prepare_nop;
2687 frame->check = slf_check_nop;
2688 }
2689 else
2690 {
2691 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2692
2693 av_push (av, waiter);
2694
2695 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2696 frame->prepare = prepare_schedule;
2697 frame->check = slf_check_signal_wait;
2698 }
2699}
2700
2701/*****************************************************************************/
2702/* Coro::AIO */
2703
2704#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2705
2706/* helper storage struct */
2707struct io_state
2708{
2709 int errorno;
2710 I32 laststype; /* U16 in 5.10.0 */
2711 int laststatval;
2712 Stat_t statcache;
2713};
2714
2715static void
2716coro_aio_callback (pTHX_ CV *cv)
2717{
2718 dXSARGS;
2719 AV *state = (AV *)GENSUB_ARG;
2720 SV *coro = av_pop (state);
2721 SV *data_sv = newSV (sizeof (struct io_state));
2722
2723 av_extend (state, items - 1);
2724
2725 sv_upgrade (data_sv, SVt_PV);
2726 SvCUR_set (data_sv, sizeof (struct io_state));
2727 SvPOK_only (data_sv);
2728
2729 {
2730 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2731
2732 data->errorno = errno;
2733 data->laststype = PL_laststype;
2734 data->laststatval = PL_laststatval;
2735 data->statcache = PL_statcache;
2736 }
2737
2738 /* now build the result vector out of all the parameters and the data_sv */
2739 {
2740 int i;
2741
2742 for (i = 0; i < items; ++i)
2743 av_push (state, SvREFCNT_inc_NN (ST (i)));
2744 }
2745
2746 av_push (state, data_sv);
2747
2748 api_ready (aTHX_ coro);
875 SvREFCNT_dec (prev); 2749 SvREFCNT_dec (coro);
2750 SvREFCNT_dec ((AV *)state);
876} 2751}
877 2752
2753static int
2754slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2755{
2756 AV *state = (AV *)frame->data;
2757
2758 /* if we are about to throw, return early */
2759 /* this does not cancel the aio request, but at least */
2760 /* it quickly returns */
2761 if (CORO_THROW)
2762 return 0;
2763
2764 /* one element that is an RV? repeat! */
2765 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2766 return 1;
2767
2768 /* restore status */
2769 {
2770 SV *data_sv = av_pop (state);
2771 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2772
2773 errno = data->errorno;
2774 PL_laststype = data->laststype;
2775 PL_laststatval = data->laststatval;
2776 PL_statcache = data->statcache;
2777
2778 SvREFCNT_dec (data_sv);
2779 }
2780
2781 /* push result values */
2782 {
2783 dSP;
2784 int i;
2785
2786 EXTEND (SP, AvFILLp (state) + 1);
2787 for (i = 0; i <= AvFILLp (state); ++i)
2788 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2789
2790 PUTBACK;
2791 }
2792
2793 return 0;
2794}
2795
2796static void
2797slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2798{
2799 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2800 SV *coro_hv = SvRV (coro_current);
2801 struct coro *coro = SvSTATE_hv (coro_hv);
2802
2803 /* put our coroutine id on the state arg */
2804 av_push (state, SvREFCNT_inc_NN (coro_hv));
2805
2806 /* first see whether we have a non-zero priority and set it as AIO prio */
2807 if (coro->prio)
2808 {
2809 dSP;
2810
2811 static SV *prio_cv;
2812 static SV *prio_sv;
2813
2814 if (expect_false (!prio_cv))
2815 {
2816 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2817 prio_sv = newSViv (0);
2818 }
2819
2820 PUSHMARK (SP);
2821 sv_setiv (prio_sv, coro->prio);
2822 XPUSHs (prio_sv);
2823
2824 PUTBACK;
2825 call_sv (prio_cv, G_VOID | G_DISCARD);
2826 }
2827
2828 /* now call the original request */
2829 {
2830 dSP;
2831 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2832 int i;
2833
2834 PUSHMARK (SP);
2835
2836 /* first push all args to the stack */
2837 EXTEND (SP, items + 1);
2838
2839 for (i = 0; i < items; ++i)
2840 PUSHs (arg [i]);
2841
2842 /* now push the callback closure */
2843 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2844
2845 /* now call the AIO function - we assume our request is uncancelable */
2846 PUTBACK;
2847 call_sv ((SV *)req, G_VOID | G_DISCARD);
2848 }
2849
2850 /* now that the requets is going, we loop toll we have a result */
2851 frame->data = (void *)state;
2852 frame->prepare = prepare_schedule;
2853 frame->check = slf_check_aio_req;
2854}
2855
2856static void
2857coro_aio_req_xs (pTHX_ CV *cv)
2858{
2859 dXSARGS;
2860
2861 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2862
2863 XSRETURN_EMPTY;
2864}
2865
2866/*****************************************************************************/
2867
2868#if CORO_CLONE
2869# include "clone.c"
2870#endif
2871
878MODULE = Coro::State PACKAGE = Coro::State 2872MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 2873
880PROTOTYPES: ENABLE 2874PROTOTYPES: DISABLE
881 2875
882BOOT: 2876BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 2877{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2878#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2879# if CORO_PTHREAD
2880 coro_thx = PERL_GET_CONTEXT;
2881# endif
2882#endif
2883 BOOT_PAGESIZE;
2884
2885 cctx_current = cctx_new_empty ();
2886
2887 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2888 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2889
2890 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2891 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2892 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2893
2894 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2895 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2896 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2897
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2898 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 2899
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2900 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2901 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2902 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2903 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 2904
896 main_mainstack = PL_mainstack; 2905 main_mainstack = PL_mainstack;
2906 main_top_env = PL_top_env;
897 2907
2908 while (main_top_env->je_prev)
2909 main_top_env = main_top_env->je_prev;
2910
2911 {
2912 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2913
2914 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2915 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2916
2917 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2918 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2919 }
2920
898 coroapi.ver = CORO_API_VERSION; 2921 coroapi.ver = CORO_API_VERSION;
2922 coroapi.rev = CORO_API_REVISION;
2923
899 coroapi.transfer = api_transfer; 2924 coroapi.transfer = api_transfer;
900}
901 2925
902Coro::State 2926 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 2927 coroapi.execute_slf = api_execute_slf;
904 SV * args 2928 coroapi.prepare_nop = prepare_nop;
905 PROTOTYPE: $ 2929 coroapi.prepare_schedule = prepare_schedule;
2930 coroapi.prepare_cede = prepare_cede;
2931 coroapi.prepare_cede_notself = prepare_cede_notself;
2932
2933 {
2934 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2935
2936 if (!svp) croak ("Time::HiRes is required");
2937 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2938
2939 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2940 }
2941
2942 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2943}
2944
2945SV *
2946new (char *klass, ...)
2947 ALIAS:
2948 Coro::new = 1
906 CODE: 2949 CODE:
907 Coro__State coro; 2950{
2951 struct coro *coro;
2952 MAGIC *mg;
2953 HV *hv;
2954 CV *cb;
2955 int i;
908 2956
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2957 if (items > 1)
910 croak ("Coro::State::_newprocess expects an arrayref");
911 2958 {
2959 cb = coro_sv_2cv (aTHX_ ST (1));
2960
2961 if (!ix)
2962 {
2963 if (CvISXSUB (cb))
2964 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2965
2966 if (!CvROOT (cb))
2967 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2968 }
2969 }
2970
912 New (0, coro, 1, struct coro); 2971 Newz (0, coro, 1, struct coro);
2972 coro->args = newAV ();
2973 coro->flags = CF_NEW;
913 2974
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2975 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 2976 coro->next = coro_first;
916 coro->stack = 0; 2977 coro_first = coro;
917 2978
918 RETVAL = coro; 2979 coro->hv = hv = newHV ();
2980 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2981 mg->mg_flags |= MGf_DUP;
2982 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2983
2984 if (items > 1)
2985 {
2986 av_extend (coro->args, items - 1 + ix - 1);
2987
2988 if (ix)
2989 {
2990 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2991 cb = cv_coro_run;
2992 }
2993
2994 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2995
2996 for (i = 2; i < items; i++)
2997 av_push (coro->args, newSVsv (ST (i)));
2998 }
2999}
919 OUTPUT: 3000 OUTPUT:
920 RETVAL 3001 RETVAL
921 3002
922void 3003void
923transfer(prev, next, flags) 3004transfer (...)
924 Coro::State_or_hashref prev
925 Coro::State_or_hashref next
926 int flags
927 PROTOTYPE: @ 3005 PROTOTYPE: $$
928 CODE: 3006 CODE:
929 PUTBACK; 3007 CORO_EXECUTE_SLF_XS (slf_init_transfer);
930 transfer (aTHX_ prev, next, flags); 3008
931 SPAGAIN; 3009bool
3010_destroy (SV *coro_sv)
3011 CODE:
3012 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3013 OUTPUT:
3014 RETVAL
932 3015
933void 3016void
934DESTROY(coro)
935 Coro::State coro
936 CODE:
937
938 if (coro->mainstack && coro->mainstack != main_mainstack)
939 {
940 struct coro temp;
941
942 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944 LOAD(aTHX_ coro);
945 SPAGAIN;
946
947 destroy_stacks (aTHX);
948
949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
951
952 coro->mainstack = 0;
953 }
954
955 deallocate_stack (coro);
956
957 Safefree (coro);
958
959void
960flush()
961 CODE:
962#ifdef MAY_FLUSH
963 flush_padlist_cache ();
964#endif
965
966void
967_exit(code) 3017_exit (int code)
968 int code
969 PROTOTYPE: $ 3018 PROTOTYPE: $
970 CODE: 3019 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE
972 _exit (code); 3020 _exit (code);
3021
3022SV *
3023clone (Coro::State coro)
3024 CODE:
3025{
3026#if CORO_CLONE
3027 struct coro *ncoro = coro_clone (aTHX_ coro);
3028 MAGIC *mg;
3029 /* TODO: too much duplication */
3030 ncoro->hv = newHV ();
3031 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
973#else 3034#else
974 signal (SIGTERM, SIG_DFL); 3035 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
975 raise (SIGTERM);
976 exit (code);
977#endif 3036#endif
3037}
3038 OUTPUT:
3039 RETVAL
978 3040
979MODULE = Coro::State PACKAGE = Coro::Cont 3041int
3042cctx_stacksize (int new_stacksize = 0)
3043 PROTOTYPE: ;$
3044 CODE:
3045 RETVAL = cctx_stacksize;
3046 if (new_stacksize)
3047 {
3048 cctx_stacksize = new_stacksize;
3049 ++cctx_gen;
3050 }
3051 OUTPUT:
3052 RETVAL
980 3053
981# this is slightly dirty (should expose a c-level api) 3054int
3055cctx_max_idle (int max_idle = 0)
3056 PROTOTYPE: ;$
3057 CODE:
3058 RETVAL = cctx_max_idle;
3059 if (max_idle > 1)
3060 cctx_max_idle = max_idle;
3061 OUTPUT:
3062 RETVAL
3063
3064int
3065cctx_count ()
3066 PROTOTYPE:
3067 CODE:
3068 RETVAL = cctx_count;
3069 OUTPUT:
3070 RETVAL
3071
3072int
3073cctx_idle ()
3074 PROTOTYPE:
3075 CODE:
3076 RETVAL = cctx_idle;
3077 OUTPUT:
3078 RETVAL
982 3079
983void 3080void
984yield(...) 3081list ()
985 PROTOTYPE: @ 3082 PROTOTYPE:
3083 PPCODE:
3084{
3085 struct coro *coro;
3086 for (coro = coro_first; coro; coro = coro->next)
3087 if (coro->hv)
3088 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3089}
3090
3091void
3092call (Coro::State coro, SV *coderef)
3093 ALIAS:
3094 eval = 1
3095 CODE:
3096{
3097 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3098 {
3099 struct coro *current = SvSTATE_current;
3100
3101 if (current != coro)
3102 {
3103 PUTBACK;
3104 save_perl (aTHX_ current);
3105 load_perl (aTHX_ coro);
3106 SPAGAIN;
3107 }
3108
3109 PUSHSTACK;
3110
3111 PUSHMARK (SP);
3112 PUTBACK;
3113
3114 if (ix)
3115 eval_sv (coderef, 0);
3116 else
3117 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3118
3119 POPSTACK;
3120 SPAGAIN;
3121
3122 if (current != coro)
3123 {
3124 PUTBACK;
3125 save_perl (aTHX_ coro);
3126 load_perl (aTHX_ current);
3127 SPAGAIN;
3128 }
3129 }
3130}
3131
3132SV *
3133is_ready (Coro::State coro)
3134 PROTOTYPE: $
3135 ALIAS:
3136 is_ready = CF_READY
3137 is_running = CF_RUNNING
3138 is_new = CF_NEW
3139 is_destroyed = CF_DESTROYED
3140 is_suspended = CF_SUSPENDED
3141 CODE:
3142 RETVAL = boolSV (coro->flags & ix);
3143 OUTPUT:
3144 RETVAL
3145
3146void
3147throw (Coro::State self, SV *throw = &PL_sv_undef)
3148 PROTOTYPE: $;$
986 CODE: 3149 CODE:
987 static SV *returnstk; 3150{
988 SV *sv; 3151 struct coro *current = SvSTATE_current;
989 AV *defav = GvAV (PL_defgv); 3152 SV **throwp = self == current ? &CORO_THROW : &self->except;
990 struct coro *prev, *next;
991
992 if (!returnstk)
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv); 3153 SvREFCNT_dec (*throwp);
1006 3154 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
1007 transfer(aTHX_ prev, next, 0);
1008
1009MODULE = Coro::State PACKAGE = Coro
1010
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT:
1014{
1015 int i;
1016 HV *stash = gv_stashpv ("Coro", TRUE);
1017
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV ();
1030
1031 {
1032 SV *sv = perl_get_sv("Coro::API", 1);
1033
1034 coroapi.schedule = api_schedule;
1035 coroapi.ready = api_ready;
1036 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current;
1038
1039 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi);
1041 SvREADONLY_on(sv);
1042 }
1043} 3155}
1044 3156
1045void 3157void
1046ready(self) 3158api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1047 SV * self 3159 PROTOTYPE: $;$
3160 C_ARGS: aTHX_ coro, flags
3161
3162SV *
3163has_cctx (Coro::State coro)
1048 PROTOTYPE: $ 3164 PROTOTYPE: $
1049 CODE: 3165 CODE:
1050 api_ready (self); 3166 /* maybe manage the running flag differently */
3167 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3168 OUTPUT:
3169 RETVAL
1051 3170
1052int 3171int
3172is_traced (Coro::State coro)
3173 PROTOTYPE: $
3174 CODE:
3175 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3176 OUTPUT:
3177 RETVAL
3178
3179UV
3180rss (Coro::State coro)
3181 PROTOTYPE: $
3182 ALIAS:
3183 usecount = 1
3184 CODE:
3185 switch (ix)
3186 {
3187 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3188 case 1: RETVAL = coro->usecount; break;
3189 }
3190 OUTPUT:
3191 RETVAL
3192
3193void
3194force_cctx ()
3195 PROTOTYPE:
3196 CODE:
3197 cctx_current->idle_sp = 0;
3198
3199void
3200swap_defsv (Coro::State self)
3201 PROTOTYPE: $
3202 ALIAS:
3203 swap_defav = 1
3204 CODE:
3205 if (!self->slot)
3206 croak ("cannot swap state with coroutine that has no saved state,");
3207 else
3208 {
3209 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3210 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3211
3212 SV *tmp = *src; *src = *dst; *dst = tmp;
3213 }
3214
3215void
3216cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3220
3221
3222MODULE = Coro::State PACKAGE = Coro
3223
3224BOOT:
3225{
3226 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3227 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3228 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3229 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3230 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3231 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3232 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3233 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3234 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3235
3236 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3237 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3238 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3239 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3240
3241 coro_stash = gv_stashpv ("Coro", TRUE);
3242
3243 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3244 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3245 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3246 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3247 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3248 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3249
3250 {
3251 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3252
3253 coroapi.schedule = api_schedule;
3254 coroapi.schedule_to = api_schedule_to;
3255 coroapi.cede = api_cede;
3256 coroapi.cede_notself = api_cede_notself;
3257 coroapi.ready = api_ready;
3258 coroapi.is_ready = api_is_ready;
3259 coroapi.nready = coro_nready;
3260 coroapi.current = coro_current;
3261
3262 /*GCoroAPI = &coroapi;*/
3263 sv_setiv (sv, (IV)&coroapi);
3264 SvREADONLY_on (sv);
3265 }
3266}
3267
3268void
3269terminate (...)
3270 CODE:
3271 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3272
3273void
3274schedule (...)
3275 CODE:
3276 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3277
3278void
3279schedule_to (...)
3280 CODE:
3281 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3282
3283void
3284cede_to (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3287
3288void
3289cede (...)
3290 CODE:
3291 CORO_EXECUTE_SLF_XS (slf_init_cede);
3292
3293void
3294cede_notself (...)
3295 CODE:
3296 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3297
3298void
3299_set_current (SV *current)
3300 PROTOTYPE: $
3301 CODE:
3302 SvREFCNT_dec (SvRV (coro_current));
3303 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3304
3305void
3306_set_readyhook (SV *hook)
3307 PROTOTYPE: $
3308 CODE:
3309 SvREFCNT_dec (coro_readyhook);
3310 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3311
3312int
3313prio (Coro::State coro, int newprio = 0)
3314 PROTOTYPE: $;$
3315 ALIAS:
3316 nice = 1
3317 CODE:
3318{
3319 RETVAL = coro->prio;
3320
3321 if (items > 1)
3322 {
3323 if (ix)
3324 newprio = coro->prio - newprio;
3325
3326 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3327 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3328
3329 coro->prio = newprio;
3330 }
3331}
3332 OUTPUT:
3333 RETVAL
3334
3335SV *
3336ready (SV *self)
3337 PROTOTYPE: $
3338 CODE:
3339 RETVAL = boolSV (api_ready (aTHX_ self));
3340 OUTPUT:
3341 RETVAL
3342
3343int
1053nready(...) 3344nready (...)
1054 PROTOTYPE: 3345 PROTOTYPE:
1055 CODE: 3346 CODE:
1056 RETVAL = coro_nready; 3347 RETVAL = coro_nready;
1057 OUTPUT: 3348 OUTPUT:
1058 RETVAL 3349 RETVAL
1059 3350
1060void 3351void
1061schedule(...) 3352suspend (Coro::State self)
1062 PROTOTYPE: 3353 PROTOTYPE: $
1063 ALIAS:
1064 cede = 1
1065 CODE: 3354 CODE:
1066 api_schedule (ix); 3355 self->flags |= CF_SUSPENDED;
1067 3356
3357void
3358resume (Coro::State self)
3359 PROTOTYPE: $
3360 CODE:
3361 self->flags &= ~CF_SUSPENDED;
3362
3363void
3364_pool_handler (...)
3365 CODE:
3366 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3367
3368void
3369async_pool (SV *cv, ...)
3370 PROTOTYPE: &@
3371 PPCODE:
3372{
3373 HV *hv = (HV *)av_pop (av_async_pool);
3374 AV *av = newAV ();
3375 SV *cb = ST (0);
3376 int i;
3377
3378 av_extend (av, items - 2);
3379 for (i = 1; i < items; ++i)
3380 av_push (av, SvREFCNT_inc_NN (ST (i)));
3381
3382 if ((SV *)hv == &PL_sv_undef)
3383 {
3384 PUSHMARK (SP);
3385 EXTEND (SP, 2);
3386 PUSHs (sv_Coro);
3387 PUSHs ((SV *)cv_pool_handler);
3388 PUTBACK;
3389 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3390 SPAGAIN;
3391
3392 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3393 }
3394
3395 {
3396 struct coro *coro = SvSTATE_hv (hv);
3397
3398 assert (!coro->invoke_cb);
3399 assert (!coro->invoke_av);
3400 coro->invoke_cb = SvREFCNT_inc (cb);
3401 coro->invoke_av = av;
3402 }
3403
3404 api_ready (aTHX_ (SV *)hv);
3405
3406 if (GIMME_V != G_VOID)
3407 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3408 else
3409 SvREFCNT_dec (hv);
3410}
3411
3412SV *
3413rouse_cb ()
3414 PROTOTYPE:
3415 CODE:
3416 RETVAL = coro_new_rouse_cb (aTHX);
3417 OUTPUT:
3418 RETVAL
3419
3420void
3421rouse_wait (...)
3422 PROTOTYPE: ;$
3423 PPCODE:
3424 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3425
3426void
3427on_enter (SV *block)
3428 ALIAS:
3429 on_leave = 1
3430 PROTOTYPE: &
3431 CODE:
3432{
3433 struct coro *coro = SvSTATE_current;
3434 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3435
3436 block = (SV *)coro_sv_2cv (aTHX_ block);
3437
3438 if (!*avp)
3439 *avp = newAV ();
3440
3441 av_push (*avp, SvREFCNT_inc (block));
3442
3443 if (!ix)
3444 on_enterleave_call (aTHX_ block);
3445
3446 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3447 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3448 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = PerlIO::cede
3453
3454BOOT:
3455 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::Semaphore
3459
3460SV *
3461new (SV *klass, SV *count = 0)
3462 CODE:
3463 RETVAL = sv_bless (
3464 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3465 GvSTASH (CvGV (cv))
3466 );
3467 OUTPUT:
3468 RETVAL
3469
3470# helper for Coro::Channel and others
3471SV *
3472_alloc (int count)
3473 CODE:
3474 RETVAL = coro_waitarray_new (aTHX_ count);
3475 OUTPUT:
3476 RETVAL
3477
3478SV *
3479count (SV *self)
3480 CODE:
3481 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3482 OUTPUT:
3483 RETVAL
3484
3485void
3486up (SV *self, int adjust = 1)
3487 ALIAS:
3488 adjust = 1
3489 CODE:
3490 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3491
3492void
3493down (...)
3494 CODE:
3495 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3496
3497void
3498wait (...)
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3501
3502void
3503try (SV *self)
3504 PPCODE:
3505{
3506 AV *av = (AV *)SvRV (self);
3507 SV *count_sv = AvARRAY (av)[0];
3508 IV count = SvIVX (count_sv);
3509
3510 if (count > 0)
3511 {
3512 --count;
3513 SvIVX (count_sv) = count;
3514 XSRETURN_YES;
3515 }
3516 else
3517 XSRETURN_NO;
3518}
3519
3520void
3521waiters (SV *self)
3522 PPCODE:
3523{
3524 AV *av = (AV *)SvRV (self);
3525 int wcount = AvFILLp (av) + 1 - 1;
3526
3527 if (GIMME_V == G_SCALAR)
3528 XPUSHs (sv_2mortal (newSViv (wcount)));
3529 else
3530 {
3531 int i;
3532 EXTEND (SP, wcount);
3533 for (i = 1; i <= wcount; ++i)
3534 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3535 }
3536}
3537
3538MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3539
3540void
3541_may_delete (SV *sem, int count, int extra_refs)
3542 PPCODE:
3543{
3544 AV *av = (AV *)SvRV (sem);
3545
3546 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3547 && AvFILLp (av) == 0 /* no waiters, just count */
3548 && SvIV (AvARRAY (av)[0]) == count)
3549 XSRETURN_YES;
3550
3551 XSRETURN_NO;
3552}
3553
3554MODULE = Coro::State PACKAGE = Coro::Signal
3555
3556SV *
3557new (SV *klass)
3558 CODE:
3559 RETVAL = sv_bless (
3560 coro_waitarray_new (aTHX_ 0),
3561 GvSTASH (CvGV (cv))
3562 );
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567wait (...)
3568 CODE:
3569 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3570
3571void
3572broadcast (SV *self)
3573 CODE:
3574{
3575 AV *av = (AV *)SvRV (self);
3576 coro_signal_wake (aTHX_ av, AvFILLp (av));
3577}
3578
3579void
3580send (SV *self)
3581 CODE:
3582{
3583 AV *av = (AV *)SvRV (self);
3584
3585 if (AvFILLp (av))
3586 coro_signal_wake (aTHX_ av, 1);
3587 else
3588 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3589}
3590
3591IV
3592awaited (SV *self)
3593 CODE:
3594 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3595 OUTPUT:
3596 RETVAL
3597
3598
3599MODULE = Coro::State PACKAGE = Coro::AnyEvent
3600
3601BOOT:
3602 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3603
3604void
3605_schedule (...)
3606 CODE:
3607{
3608 static int incede;
3609
3610 api_cede_notself (aTHX);
3611
3612 ++incede;
3613 while (coro_nready >= incede && api_cede (aTHX))
3614 ;
3615
3616 sv_setsv (sv_activity, &PL_sv_undef);
3617 if (coro_nready >= incede)
3618 {
3619 PUSHMARK (SP);
3620 PUTBACK;
3621 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3622 }
3623
3624 --incede;
3625}
3626
3627
3628MODULE = Coro::State PACKAGE = Coro::AIO
3629
3630void
3631_register (char *target, char *proto, SV *req)
3632 CODE:
3633{
3634 CV *req_cv = coro_sv_2cv (aTHX_ req);
3635 /* newXSproto doesn't return the CV on 5.8 */
3636 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3637 sv_setpv ((SV *)slf_cv, proto);
3638 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3639}
3640

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