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Comparing Coro/Coro/State.xs (file contents):
Revision 1.20 by root, Fri Aug 3 12:51:56 2001 UTC vs.
Revision 1.328 by root, Tue Nov 25 09:49:43 2008 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_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef 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
20
21#define MAY_FLUSH /* increases codesize */
22
23/* perl-related */
24#define TRANSFER_SAVE_DEFAV 0x00000001
25#define TRANSFER_SAVE_DEFSV 0x00000002
26#define TRANSFER_SAVE_ERRSV 0x00000004
27/* c-related */
28#define TRANSFER_SAVE_CCTXT 0x00000008
29#ifdef CORO_LAZY_STACK
30# define TRANSFER_LAZY_STACK 0x00000010
31#else 44#else
32# define TRANSFER_LAZY_STACK 0x00000000 45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
33#endif 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
34 82
35#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 83/* 5.11 */
36 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
37 87
38#define SUB_INIT "Coro::State::initialize" 88/* 5.10.0 */
39#define UCORO_STATE "_coro_state" 89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
40 92
41/* The next macro should delcare a variable stacklevel that contains and approximation 93/* 5.8.8 */
42 * to the current C stack pointer. It's property is that it changes with each call 94#ifndef GV_NOTQUAL
43 * and should be unique. */ 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
44#define dSTACKLEVEL void *stacklevel = &stacklevel 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
45 137
46#define labs(l) ((l) >= 0 ? (l) : -(l)) 138#define IN_DESTRUCT (PL_main_cv == Nullcv)
47 139
48/* this is actually not only the c stack but also c registers etc... */ 140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
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;
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 */
177
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 */
49typedef struct { 213typedef struct coro_cctx
50 int refcnt; /* pointer reference counter */ 214{
51 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
52 int gencnt; /* generation counter */
53 216
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;
54 coro_context cctx; 225 coro_context cctx;
55 226
56 void *sptr; 227 U32 gen;
57 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
58} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
59 233
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};
244
245/* the structure where most of the perl state is stored, overlaid on the cxstack */
246typedef struct
247{
248 SV *defsv;
249 AV *defav;
250 SV *errsv;
251 SV *irsgv;
252 HV *hinthv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
60struct coro { 261struct coro {
61 /* the optional C context */ 262 /* the C coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 263 coro_cctx *cctx;
63 void *cursp;
64 int gencnt;
65 264
66 /* optionally saved, might be zero */ 265 /* state data */
67 AV *defav; 266 struct CoroSLF slf_frame; /* saved slf frame */
68 SV *defsv;
69 SV *errsv;
70
71 /* saved global state not related to stacks */
72 U8 dowarn;
73 I32 in_eval;
74
75 /* the stacks and related info (callchain etc..) */
76 PERL_SI *curstackinfo;
77 AV *curstack;
78 AV *mainstack; 267 AV *mainstack;
79 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
80 OP *op;
81 SV **curpad;
82 SV **stack_base;
83 SV **stack_max;
84 SV **tmps_stack;
85 I32 tmps_floor;
86 I32 tmps_ix;
87 I32 tmps_max;
88 I32 *markstack;
89 I32 *markstack_ptr;
90 I32 *markstack_max;
91 I32 *scopestack;
92 I32 scopestack_ix;
93 I32 scopestack_max;
94 ANY *savestack;
95 I32 savestack_ix;
96 I32 savestack_max;
97 OP **retstack;
98 I32 retstack_ix;
99 I32 retstack_max;
100 COP *curcop;
101 JMPENV *top_env;
102 269
270 CV *startcv; /* the CV to execute */
103 /* data associated with this coroutine (initial args) */ 271 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 272 int refcnt; /* coroutines are refcounted, yes */
273 int flags; /* CF_ flags */
274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
279
280 /* coro process data */
281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* linked list */
291 struct coro *next, *prev;
105}; 292};
106 293
107typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
109 296
110static AV *main_mainstack; /* used to differentiate between $main and others */ 297/* the following variables are effectively part of the perl context */
111static HV *coro_state_stash; 298/* and get copied between struct coro and these variables */
112static SV *ucoro_state_sv; 299/* the mainr easonw e don't support windows process emulation */
113static U32 ucoro_state_hash; 300static struct CoroSLF slf_frame; /* the current slf frame */
114static HV *padlist_cache;
115 301
116/* mostly copied from op.c:cv_clone2 */ 302/** Coro ********************************************************************/
117STATIC AV * 303
118clone_padlist (AV *protopadlist) 304#define PRIO_MAX 3
305#define PRIO_HIGH 1
306#define PRIO_NORMAL 0
307#define PRIO_LOW -1
308#define PRIO_IDLE -3
309#define PRIO_MIN -4
310
311/* for Coro.pm */
312static SV *coro_current;
313static SV *coro_readyhook;
314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
318
319/** lowlevel stuff **********************************************************/
320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
119{ 323{
120 AV *av; 324#if PERL_VERSION_ATLEAST (5,10,0)
121 I32 ix; 325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 326 get_sv (name, create);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 327#endif
124 SV **pname = AvARRAY (protopad_name); 328 return get_sv (name, create);
125 SV **ppad = AvARRAY (protopad); 329}
126 I32 fname = AvFILLp (protopad_name); 330
127 I32 fpad = AvFILLp (protopad); 331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360static AV *
361coro_derive_padlist (pTHX_ CV *cv)
362{
363 AV *padlist = CvPADLIST (cv);
128 AV *newpadlist, *newpad_name, *newpad; 364 AV *newpadlist, *newpad;
129 SV **npad;
130
131 newpad_name = newAV ();
132 for (ix = fname; ix >= 0; ix--)
133 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135 newpad = newAV ();
136 av_fill (newpad, AvFILLp (protopad));
137 npad = AvARRAY (newpad);
138 365
139 newpadlist = newAV (); 366 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 367 AvREAL_off (newpadlist);
141 av_store (newpadlist, 0, (SV *) newpad_name); 368#if PERL_VERSION_ATLEAST (5,10,0)
369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
370#else
371 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
372#endif
373 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
374 --AvFILLp (padlist);
375
376 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
142 av_store (newpadlist, 1, (SV *) newpad); 377 av_store (newpadlist, 1, (SV *)newpad);
143 378
144 av = newAV (); /* will be @_ */ 379 return newpadlist;
145 av_extend (av, 0); 380}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 381
149 for (ix = fpad; ix > 0; ix--) 382static void
383free_padlist (pTHX_ AV *padlist)
384{
385 /* may be during global destruction */
386 if (SvREFCNT (padlist))
150 { 387 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 388 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 389 while (i >= 0)
153 { 390 {
154 char *name = SvPVX (namesv); /* XXX */ 391 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 392 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 393 {
159 else
160 { /* our own lexical */
161 SV *sv; 394 SV *sv;
162 if (*name == '&') 395 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 396 SvREFCNT_dec (sv);
164 else if (*name == '@') 397
165 sv = (SV *) newAV (); 398 SvREFCNT_dec (*svp);
166 else if (*name == '%')
167 sv = (SV *) newHV ();
168 else
169 sv = NEWSV (0, 0);
170 if (!SvPADBUSY (sv))
171 SvPADMY_on (sv);
172 npad[ix] = sv;
173 } 399 }
174 } 400 }
175 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
176 {
177 npad[ix] = SvREFCNT_inc (ppad[ix]);
178 }
179 else
180 {
181 SV *sv = NEWSV (0, 0);
182 SvPADTMP_on (sv);
183 npad[ix] = sv;
184 }
185 }
186 401
187#if 0 /* return -ENOTUNDERSTOOD */
188 /* Now that vars are all in place, clone nested closures. */
189
190 for (ix = fpad; ix > 0; ix--) {
191 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192 if (namesv
193 && namesv != &PL_sv_undef
194 && !(SvFLAGS(namesv) & SVf_FAKE)
195 && *SvPVX(namesv) == '&'
196 && CvCLONE(ppad[ix]))
197 {
198 CV *kid = cv_clone((CV*)ppad[ix]);
199 SvREFCNT_dec(ppad[ix]);
200 CvCLONE_on(kid);
201 SvPADMY_on(kid);
202 npad[ix] = (SV*)kid;
203 }
204 }
205#endif
206
207 return newpadlist;
208}
209
210#ifdef MAY_FLUSH
211STATIC AV *
212free_padlist (AV *padlist)
213{
214 /* may be during global destruction */
215 if (SvREFCNT(padlist))
216 {
217 I32 i = AvFILLp(padlist);
218 while (i >= 0)
219 {
220 SV **svp = av_fetch(padlist, i--, FALSE);
221 SV *sv = svp ? *svp : Nullsv;
222 if (sv)
223 SvREFCNT_dec(sv);
224 }
225
226 SvREFCNT_dec((SV*)padlist); 402 SvREFCNT_dec ((SV*)padlist);
227 } 403 }
228} 404}
229#endif 405
406static int
407coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
408{
409 AV *padlist;
410 AV *av = (AV *)mg->mg_obj;
411
412 /* casting is fun. */
413 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
414 free_padlist (aTHX_ padlist);
415
416 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
417
418 return 0;
419}
420
421#define CORO_MAGIC_type_cv 26
422#define CORO_MAGIC_type_state PERL_MAGIC_ext
423
424static MGVTBL coro_cv_vtbl = {
425 0, 0, 0, 0,
426 coro_cv_free
427};
428
429#define CORO_MAGIC_NN(sv, type) \
430 (expect_true (SvMAGIC (sv)->mg_type == type) \
431 ? SvMAGIC (sv) \
432 : mg_find (sv, type))
433
434#define CORO_MAGIC(sv, type) \
435 (expect_true (SvMAGIC (sv)) \
436 ? CORO_MAGIC_NN (sv, type) \
437 : 0)
438
439#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
440#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
441
442INLINE struct coro *
443SvSTATE_ (pTHX_ SV *coro)
444{
445 HV *stash;
446 MAGIC *mg;
447
448 if (SvROK (coro))
449 coro = SvRV (coro);
450
451 if (expect_false (SvTYPE (coro) != SVt_PVHV))
452 croak ("Coro::State object required");
453
454 stash = SvSTASH (coro);
455 if (expect_false (stash != coro_stash && stash != coro_state_stash))
456 {
457 /* very slow, but rare, check */
458 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
459 croak ("Coro::State object required");
460 }
461
462 mg = CORO_MAGIC_state (coro);
463 return (struct coro *)mg->mg_ptr;
464}
465
466#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
467
468/* faster than SvSTATE, but expects a coroutine hv */
469#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
470#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
230 471
231/* the next two functions merely cache the padlists */ 472/* the next two functions merely cache the padlists */
232STATIC void 473static void
233get_padlist (CV *cv) 474get_padlist (pTHX_ CV *cv)
234{ 475{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 476 MAGIC *mg = CORO_MAGIC_cv (cv);
477 AV *av;
236 478
237 if (he && AvFILLp ((AV *)*he) >= 0) 479 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 480 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239 else 481 else
240 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241}
242
243STATIC void
244put_padlist (CV *cv)
245{
246 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248 if (SvTYPE (*he) != SVt_PVAV)
249 { 482 {
483#if CORO_PREFER_PERL_FUNCTIONS
484 /* this is probably cleaner? but also slower! */
485 /* in practise, it seems to be less stable */
486 CV *cp = Perl_cv_clone (aTHX_ cv);
487 CvPADLIST (cv) = CvPADLIST (cp);
488 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (*he); 489 SvREFCNT_dec (cp);
251 *he = (SV *)newAV (); 490#else
491 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
492#endif
252 } 493 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 494}
256 495
257#ifdef MAY_FLUSH
258STATIC void
259flush_padlist_cache ()
260{
261 HV *hv = padlist_cache;
262 padlist_cache = newHV ();
263
264 if (hv_iterinit (hv))
265 {
266 HE *he;
267 AV *padlist;
268
269 while (!!(he = hv_iternext (hv)))
270 {
271 AV *av = (AV *)HeVAL(he);
272
273 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (padlist);
276 }
277 }
278
279 SvREFCNT_dec (hv);
280}
281#endif
282
283#define SB do {
284#define SE } while (0)
285
286#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
287#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
290
291static void 496static void
497put_padlist (pTHX_ CV *cv)
498{
499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
501
502 if (expect_false (!mg))
503 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
504
505 av = (AV *)mg->mg_obj;
506
507 if (expect_false (AvFILLp (av) >= AvMAX (av)))
508 av_extend (av, AvMAX (av) + 1);
509
510 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
511}
512
513/** load & save, init *******************************************************/
514
515static void
292load_state(pTHX_ Coro__State c) 516load_perl (pTHX_ Coro__State c)
293{ 517{
294 PL_dowarn = c->dowarn; 518 perl_slots *slot = c->slot;
295 PL_in_eval = c->in_eval; 519 c->slot = 0;
296 520
297 PL_curstackinfo = c->curstackinfo;
298 PL_curstack = c->curstack;
299 PL_mainstack = c->mainstack; 521 PL_mainstack = c->mainstack;
300 PL_stack_sp = c->stack_sp;
301 PL_op = c->op;
302 PL_curpad = c->curpad;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318 PL_retstack = c->retstack;
319 PL_retstack_ix = c->retstack_ix;
320 PL_retstack_max = c->retstack_max;
321 PL_curcop = c->curcop;
322 PL_top_env = c->top_env;
323 522
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 523 GvSV (PL_defgv) = slot->defsv;
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 524 GvAV (PL_defgv) = slot->defav;
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 525 GvSV (PL_errgv) = slot->errsv;
526 GvSV (irsgv) = slot->irsgv;
527 GvHV (PL_hintgv) = slot->hinthv;
528
529 #define VAR(name,type) PL_ ## name = slot->name;
530 # include "state.h"
531 #undef VAR
327 532
328 { 533 {
329 dSP; 534 dSP;
535
330 CV *cv; 536 CV *cv;
331 537
332 /* now do the ugly restore mess */ 538 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 539 while (expect_true (cv = (CV *)POPs))
334 { 540 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 541 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 542 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 543 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 544 }
348 545
349 PUTBACK; 546 PUTBACK;
350 } 547 }
351}
352 548
549 slf_frame = c->slf_frame;
550 CORO_THROW = c->except;
551}
552
353static void 553static void
354save_state(pTHX_ Coro__State c, int flags) 554save_perl (pTHX_ Coro__State c)
355{ 555{
556 c->except = CORO_THROW;
557 c->slf_frame = slf_frame;
558
356 { 559 {
357 dSP; 560 dSP;
358 I32 cxix = cxstack_ix; 561 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 562 PERL_CONTEXT *ccstk = cxstack;
360 PERL_SI *top_si = PL_curstackinfo; 563 PERL_SI *top_si = PL_curstackinfo;
… …
362 /* 565 /*
363 * the worst thing you can imagine happens first - we have to save 566 * the worst thing you can imagine happens first - we have to save
364 * (and reinitialize) all cv's in the whole callchain :( 567 * (and reinitialize) all cv's in the whole callchain :(
365 */ 568 */
366 569
367 PUSHs (Nullsv); 570 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 571 /* this loop was inspired by pp_caller */
369 for (;;) 572 for (;;)
370 { 573 {
371 do 574 while (expect_true (cxix >= 0))
372 { 575 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 576 PERL_CONTEXT *cx = &ccstk[cxix--];
374 577
375 if (CxTYPE(cx) == CXt_SUB) 578 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376 { 579 {
377 CV *cv = cx->blk_sub.cv; 580 CV *cv = cx->blk_sub.cv;
581
378 if (CvDEPTH(cv)) 582 if (expect_true (CvDEPTH (cv)))
379 { 583 {
380#ifdef USE_THREADS
381 /*XPUSHs ((SV *)CvOWNER(cv));*/
382 /*CvOWNER(cv) = 0;*/
383 /*error must unlock this cv etc.. etc...*/
384#endif
385 EXTEND (SP, CvDEPTH(cv)*2); 584 EXTEND (SP, 3);
386
387 while (--CvDEPTH(cv))
388 {
389 /* this tells the restore code to increment CvDEPTH */
390 PUSHs (Nullsv);
391 PUSHs ((SV *)cv);
392 }
393
394 PUSHs ((SV *)CvPADLIST(cv)); 585 PUSHs ((SV *)CvPADLIST (cv));
586 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 587 PUSHs ((SV *)cv);
396 588
397 get_padlist (cv); /* this is a monster */ 589 CvDEPTH (cv) = 0;
590 get_padlist (aTHX_ cv);
398 } 591 }
399 } 592 }
400 else if (CxTYPE(cx) == CXt_FORMAT)
401 {
402 /* I never used formats, so how should I know how these are implemented? */
403 /* my bold guess is as a simple, plain sub... */
404 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405 }
406 } 593 }
407 while (cxix >= 0);
408 594
409 if (top_si->si_type == PERLSI_MAIN) 595 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 596 break;
411 597
412 top_si = top_si->si_prev; 598 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 599 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 600 cxix = top_si->si_cxix;
415 } 601 }
416 602
417 PUTBACK; 603 PUTBACK;
418 } 604 }
419 605
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 606 /* allocate some space on the context stack for our purposes */
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 607 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 608 if (SLOT_COUNT >= 1) CXINC;
609 if (SLOT_COUNT >= 2) CXINC;
610 if (SLOT_COUNT >= 3) CXINC;
611 {
612 int i;
613 for (i = 3; i < SLOT_COUNT; ++i)
614 CXINC;
615 }
616 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 617
424 /* I have not the slightest idea of why av_reify is necessary */
425 /* but if it's missing the defav contents magically get replaced sometimes */
426 if (c->defav)
427 av_reify (c->defav);
428
429 c->dowarn = PL_dowarn;
430 c->in_eval = PL_in_eval;
431
432 c->curstackinfo = PL_curstackinfo;
433 c->curstack = PL_curstack;
434 c->mainstack = PL_mainstack; 618 c->mainstack = PL_mainstack;
435 c->stack_sp = PL_stack_sp; 619
436 c->op = PL_op; 620 {
437 c->curpad = PL_curpad; 621 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
438 c->stack_base = PL_stack_base; 622
439 c->stack_max = PL_stack_max; 623 slot->defav = GvAV (PL_defgv);
440 c->tmps_stack = PL_tmps_stack; 624 slot->defsv = DEFSV;
441 c->tmps_floor = PL_tmps_floor; 625 slot->errsv = ERRSV;
442 c->tmps_ix = PL_tmps_ix; 626 slot->irsgv = GvSV (irsgv);
443 c->tmps_max = PL_tmps_max; 627 slot->hinthv = GvHV (PL_hintgv);
444 c->markstack = PL_markstack; 628
445 c->markstack_ptr = PL_markstack_ptr; 629 #define VAR(name,type) slot->name = PL_ ## name;
446 c->markstack_max = PL_markstack_max; 630 # include "state.h"
447 c->scopestack = PL_scopestack; 631 #undef VAR
448 c->scopestack_ix = PL_scopestack_ix; 632 }
449 c->scopestack_max = PL_scopestack_max;
450 c->savestack = PL_savestack;
451 c->savestack_ix = PL_savestack_ix;
452 c->savestack_max = PL_savestack_max;
453 c->retstack = PL_retstack;
454 c->retstack_ix = PL_retstack_ix;
455 c->retstack_max = PL_retstack_max;
456 c->curcop = PL_curcop;
457 c->top_env = PL_top_env;
458} 633}
459 634
460/* 635/*
461 * allocate various perl stacks. This is an exact copy 636 * allocate various perl stacks. This is almost an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 637 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 638 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 639 * not usually need a lot of stackspace.
465 */ 640 */
466STATIC void 641#if CORO_PREFER_PERL_FUNCTIONS
642# define coro_init_stacks(thx) init_stacks ()
643#else
644static void
467coro_init_stacks (pTHX) 645coro_init_stacks (pTHX)
468{ 646{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 647 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 648 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 649 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 650 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 651
474 PL_stack_base = AvARRAY(PL_curstack); 652 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 653 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 654 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 655
478 New(50,PL_tmps_stack,96,SV*); 656 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 657 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 658 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 659 PL_tmps_max = 32;
482 660
483 New(54,PL_markstack,16,I32); 661 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 662 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 663 PL_markstack_max = PL_markstack + 16;
486 664
665#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 666 SET_MARK_OFFSET;
667#endif
488 668
489 New(54,PL_scopestack,16,I32); 669 New(54,PL_scopestack,8,I32);
490 PL_scopestack_ix = 0; 670 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 671 PL_scopestack_max = 8;
492 672
493 New(54,PL_savestack,96,ANY); 673 New(54,PL_savestack,24,ANY);
494 PL_savestack_ix = 0; 674 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 675 PL_savestack_max = 24;
496 676
677#if !PERL_VERSION_ATLEAST (5,10,0)
497 New(54,PL_retstack,8,OP*); 678 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 679 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 680 PL_retstack_max = 4;
681#endif
500} 682}
683#endif
501 684
502/* 685/*
503 * destroy the stacks, the callchain etc... 686 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 687 */
506STATIC void 688static void
507destroy_stacks(pTHX) 689coro_destruct_stacks (pTHX)
508{ 690{
509 /* is this ugly, I ask? */
510 while (PL_scopestack_ix)
511 LEAVE;
512
513 /* sure it is, but more important: is it correct?? :/ */
514 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515 FREETMPS;
516
517 while (PL_curstackinfo->si_next) 691 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 692 PL_curstackinfo = PL_curstackinfo->si_next;
519 693
520 while (PL_curstackinfo) 694 while (PL_curstackinfo)
521 { 695 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 696 PERL_SI *p = PL_curstackinfo->si_prev;
523 697
524 { 698 if (!IN_DESTRUCT)
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 dounwind(-1);
531
532 SvREFCNT_dec(PL_curstackinfo->si_stack); 699 SvREFCNT_dec (PL_curstackinfo->si_stack);
700
533 Safefree(PL_curstackinfo->si_cxstack); 701 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 702 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 703 PL_curstackinfo = p;
536 } 704 }
537 705
538 Safefree(PL_tmps_stack); 706 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 707 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 708 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 709 Safefree (PL_savestack);
710#if !PERL_VERSION_ATLEAST (5,10,0)
542 Safefree(PL_retstack); 711 Safefree (PL_retstack);
543}
544
545static void
546allocate_stack (Coro__State ctx, int alloc)
547{
548 coro_stack *stack;
549
550 New (0, stack, 1, coro_stack);
551
552 stack->refcnt = 1;
553 stack->usecnt = 1;
554 stack->gencnt = ctx->gencnt = 0;
555 if (alloc)
556 {
557#ifdef HAVE_MMAP
558 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
559 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560 if (stack->sptr == (void *)-1)
561#endif 712#endif
713}
714
715#define CORO_RSS \
716 rss += sizeof (SYM (curstackinfo)); \
717 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
718 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
719 rss += SYM (tmps_max) * sizeof (SV *); \
720 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
721 rss += SYM (scopestack_max) * sizeof (I32); \
722 rss += SYM (savestack_max) * sizeof (ANY);
723
724static size_t
725coro_rss (pTHX_ struct coro *coro)
726{
727 size_t rss = sizeof (*coro);
728
729 if (coro->mainstack)
730 {
731 if (coro->flags & CF_RUNNING)
562 { 732 {
563 /*FIXME*//*D*//* reasonable stack size! */ 733 #define SYM(sym) PL_ ## sym
564 stack->ssize = -4096 * sizeof (long); 734 CORO_RSS;
565 New (0, stack->sptr, 4096, long); 735 #undef SYM
566 } 736 }
567 }
568 else 737 else
569 stack->sptr = 0;
570
571 ctx->stack = stack;
572}
573
574static void
575deallocate_stack (Coro__State ctx)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
583 if (!--stack->refcnt)
584 { 738 {
585#ifdef HAVE_MMAP 739 #define SYM(sym) coro->slot->sym
586 if (stack->ssize > 0 && stack->sptr) 740 CORO_RSS;
587 munmap (stack->sptr, stack->ssize); 741 #undef SYM
588 else
589#else
590 Safefree (stack->sptr);
591#endif
592 Safefree (stack);
593 } 742 }
594 else if (ctx->gencnt == stack->gencnt) 743 }
595 --stack->usecnt; 744
745 return rss;
746}
747
748/** coroutine stack handling ************************************************/
749
750static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
751static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
752static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
753
754/* apparently < 5.8.8 */
755#ifndef MgPV_nolen_const
756#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
757 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
758 (const char*)(mg)->mg_ptr)
759#endif
760
761/*
762 * This overrides the default magic get method of %SIG elements.
763 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
764 * and instead of tryign to save and restore the hash elements, we just provide
765 * readback here.
766 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
767 * not expecting this to actually change the hook. This is a potential problem
768 * when a schedule happens then, but we ignore this.
769 */
770static int
771coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
772{
773 const char *s = MgPV_nolen_const (mg);
774
775 if (*s == '_')
596 } 776 {
597} 777 SV **svp = 0;
598 778
779 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
780 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
781
782 if (svp)
783 {
784 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
785 return 0;
786 }
787 }
788
789 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
790}
791
599static void 792static int
600setup_coro (void *arg) 793coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
794{
795 const char *s = MgPV_nolen_const (mg);
796
797 if (*s == '_')
798 {
799 SV **svp = 0;
800
801 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
802 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
803
804 if (svp)
805 {
806 SV *old = *svp;
807 *svp = 0;
808 SvREFCNT_dec (old);
809 return 0;
810 }
811 }
812
813 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
814}
815
816static int
817coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
818{
819 const char *s = MgPV_nolen_const (mg);
820
821 if (*s == '_')
822 {
823 SV **svp = 0;
824
825 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
826 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
827
828 if (svp)
829 {
830 SV *old = *svp;
831 *svp = newSVsv (sv);
832 SvREFCNT_dec (old);
833 return 0;
834 }
835 }
836
837 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
838}
839
840static void
841prepare_nop (pTHX_ struct coro_transfer_args *ta)
842{
843 /* kind of mega-hacky, but works */
844 ta->next = ta->prev = (struct coro *)ta;
845}
846
847static int
848slf_check_nop (pTHX_ struct CoroSLF *frame)
849{
850 return 0;
851}
852
853static int
854slf_check_repeat (pTHX_ struct CoroSLF *frame)
855{
856 return 1;
857}
858
859static UNOP coro_setup_op;
860
861static void NOINLINE /* noinline to keep it out of the transfer fast path */
862coro_setup (pTHX_ struct coro *coro)
601{ 863{
602 /* 864 /*
603 * emulate part of the perl startup here. 865 * emulate part of the perl startup here.
604 */ 866 */
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 867 coro_init_stacks (aTHX);
610 /*PL_curcop = 0;*/ 868
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 869 PL_runops = RUNOPS_DEFAULT;
870 PL_curcop = &PL_compiling;
871 PL_in_eval = EVAL_NULL;
872 PL_comppad = 0;
873 PL_comppad_name = 0;
874 PL_comppad_name_fill = 0;
875 PL_comppad_name_floor = 0;
876 PL_curpm = 0;
877 PL_curpad = 0;
878 PL_localizing = 0;
879 PL_dirty = 0;
880 PL_restartop = 0;
881#if PERL_VERSION_ATLEAST (5,10,0)
882 PL_parser = 0;
883#endif
884 PL_hints = 0;
885
886 /* recreate the die/warn hooks */
887 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
888 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
889
890 GvSV (PL_defgv) = newSV (0);
891 GvAV (PL_defgv) = coro->args; coro->args = 0;
892 GvSV (PL_errgv) = newSV (0);
893 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
894 GvHV (PL_hintgv) = 0;
895 PL_rs = newSVsv (GvSV (irsgv));
896 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
897
898 {
899 dSP;
900 UNOP myop;
901
902 Zero (&myop, 1, UNOP);
903 myop.op_next = Nullop;
904 myop.op_type = OP_ENTERSUB;
905 myop.op_flags = OPf_WANT_VOID;
906
907 PUSHMARK (SP);
908 PUSHs ((SV *)coro->startcv);
909 PUTBACK;
910 PL_op = (OP *)&myop;
911 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
912 }
913
914 /* this newly created coroutine might be run on an existing cctx which most
915 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
916 */
917 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
918 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
919
920 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
921 coro_setup_op.op_next = PL_op;
922 coro_setup_op.op_type = OP_ENTERSUB;
923 coro_setup_op.op_ppaddr = pp_slf;
924 /* no flags etc. required, as an init function won't be called */
925
926 PL_op = (OP *)&coro_setup_op;
927
928 /* copy throw, in case it was set before coro_setup */
929 CORO_THROW = coro->except;
930}
931
932static void
933coro_destruct (pTHX_ struct coro *coro)
934{
935 if (!IN_DESTRUCT)
936 {
937 /* restore all saved variables and stuff */
938 LEAVE_SCOPE (0);
939 assert (PL_tmps_floor == -1);
940
941 /* free all temporaries */
942 FREETMPS;
943 assert (PL_tmps_ix == -1);
944
945 /* unwind all extra stacks */
946 POPSTACK_TO (PL_mainstack);
947
948 /* unwind main stack */
949 dounwind (-1);
950 }
951
952 SvREFCNT_dec (GvSV (PL_defgv));
612 SvREFCNT_dec (GvAV (PL_defgv)); 953 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; 954 SvREFCNT_dec (GvSV (PL_errgv));
955 SvREFCNT_dec (PL_defoutgv);
956 SvREFCNT_dec (PL_rs);
957 SvREFCNT_dec (GvSV (irsgv));
958 SvREFCNT_dec (GvHV (PL_hintgv));
614 959
615 SPAGAIN; 960 SvREFCNT_dec (PL_diehook);
961 SvREFCNT_dec (PL_warnhook);
962
963 SvREFCNT_dec (coro->saved_deffh);
964 SvREFCNT_dec (coro->rouse_cb);
965 SvREFCNT_dec (coro->invoke_cb);
966 SvREFCNT_dec (coro->invoke_av);
616 967
968 coro_destruct_stacks (aTHX);
969}
970
971INLINE void
972free_coro_mortal (pTHX)
973{
974 if (expect_true (coro_mortal))
975 {
976 SvREFCNT_dec (coro_mortal);
977 coro_mortal = 0;
978 }
979}
980
981static int
982runops_trace (pTHX)
983{
984 COP *oldcop = 0;
985 int oldcxix = -2;
986
987 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
988 {
989 PERL_ASYNC_CHECK ();
990
991 if (cctx_current->flags & CC_TRACE_ALL)
992 {
993 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
994 {
995 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
996 SV **bot, **top;
997 AV *av = newAV (); /* return values */
998 SV **cb;
999 dSP;
1000
1001 GV *gv = CvGV (cx->blk_sub.cv);
1002 SV *fullname = sv_2mortal (newSV (0));
1003 if (isGV (gv))
1004 gv_efullname3 (fullname, gv, 0);
1005
1006 bot = PL_stack_base + cx->blk_oldsp + 1;
1007 top = cx->blk_gimme == G_ARRAY ? SP + 1
1008 : cx->blk_gimme == G_SCALAR ? bot + 1
1009 : bot;
1010
1011 av_extend (av, top - bot);
1012 while (bot < top)
1013 av_push (av, SvREFCNT_inc_NN (*bot++));
1014
1015 PL_runops = RUNOPS_DEFAULT;
1016 ENTER;
1017 SAVETMPS;
1018 EXTEND (SP, 3);
1019 PUSHMARK (SP);
1020 PUSHs (&PL_sv_no);
1021 PUSHs (fullname);
1022 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1023 PUTBACK;
1024 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1025 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1026 SPAGAIN;
1027 FREETMPS;
1028 LEAVE;
1029 PL_runops = runops_trace;
1030 }
1031
1032 if (oldcop != PL_curcop)
1033 {
1034 oldcop = PL_curcop;
1035
1036 if (PL_curcop != &PL_compiling)
1037 {
1038 SV **cb;
1039
1040 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1041 {
1042 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1043
1044 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1045 {
1046 dSP;
1047 GV *gv = CvGV (cx->blk_sub.cv);
1048 SV *fullname = sv_2mortal (newSV (0));
1049
1050 if (isGV (gv))
1051 gv_efullname3 (fullname, gv, 0);
1052
1053 PL_runops = RUNOPS_DEFAULT;
1054 ENTER;
1055 SAVETMPS;
1056 EXTEND (SP, 3);
1057 PUSHMARK (SP);
1058 PUSHs (&PL_sv_yes);
1059 PUSHs (fullname);
1060 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1061 PUTBACK;
1062 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1063 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1064 SPAGAIN;
1065 FREETMPS;
1066 LEAVE;
1067 PL_runops = runops_trace;
1068 }
1069
1070 oldcxix = cxstack_ix;
1071 }
1072
1073 if (cctx_current->flags & CC_TRACE_LINE)
1074 {
1075 dSP;
1076
1077 PL_runops = RUNOPS_DEFAULT;
1078 ENTER;
1079 SAVETMPS;
1080 EXTEND (SP, 3);
1081 PL_runops = RUNOPS_DEFAULT;
1082 PUSHMARK (SP);
1083 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1084 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1085 PUTBACK;
1086 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1087 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1088 SPAGAIN;
1089 FREETMPS;
1090 LEAVE;
1091 PL_runops = runops_trace;
1092 }
1093 }
1094 }
1095 }
1096 }
1097
1098 TAINT_NOT;
1099 return 0;
1100}
1101
1102static struct CoroSLF cctx_ssl_frame;
1103
1104static void
1105slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1106{
1107 ta->prev = 0;
1108}
1109
1110static int
1111slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1112{
1113 *frame = cctx_ssl_frame;
1114
1115 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1116}
1117
1118/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1119static void NOINLINE
1120cctx_prepare (pTHX)
1121{
1122 PL_top_env = &PL_start_env;
1123
1124 if (cctx_current->flags & CC_TRACE)
1125 PL_runops = runops_trace;
1126
1127 /* we already must be executing an SLF op, there is no other valid way
1128 * that can lead to creation of a new cctx */
1129 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1130 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1131
1132 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1133 cctx_ssl_frame = slf_frame;
1134
1135 slf_frame.prepare = slf_prepare_set_stacklevel;
1136 slf_frame.check = slf_check_set_stacklevel;
1137}
1138
1139/* the tail of transfer: execute stuff we can only do after a transfer */
1140INLINE void
1141transfer_tail (pTHX)
1142{
1143 free_coro_mortal (aTHX);
1144}
1145
1146/*
1147 * this is a _very_ stripped down perl interpreter ;)
1148 */
1149static void
1150cctx_run (void *arg)
1151{
1152#ifdef USE_ITHREADS
1153# if CORO_PTHREAD
1154 PERL_SET_CONTEXT (coro_thx);
1155# endif
1156#endif
1157 {
1158 dTHX;
1159
1160 /* normally we would need to skip the entersub here */
1161 /* not doing so will re-execute it, which is exactly what we want */
1162 /* PL_nop = PL_nop->op_next */
1163
1164 /* inject a fake subroutine call to cctx_init */
1165 cctx_prepare (aTHX);
1166
1167 /* cctx_run is the alternative tail of transfer() */
1168 transfer_tail (aTHX);
1169
1170 /* somebody or something will hit me for both perl_run and PL_restartop */
1171 PL_restartop = PL_op;
1172 perl_run (PL_curinterp);
1173 /*
1174 * Unfortunately, there is no way to get at the return values of the
1175 * coro body here, as perl_run destroys these
1176 */
1177
1178 /*
1179 * If perl-run returns we assume exit() was being called or the coro
1180 * fell off the end, which seems to be the only valid (non-bug)
1181 * reason for perl_run to return. We try to exit by jumping to the
1182 * bootstrap-time "top" top_env, as we cannot restore the "main"
1183 * coroutine as Coro has no such concept.
1184 * This actually isn't valid with the pthread backend, but OSes requiring
1185 * that backend are too broken to do it in a standards-compliant way.
1186 */
1187 PL_top_env = main_top_env;
1188 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1189 }
1190}
1191
1192static coro_cctx *
1193cctx_new ()
1194{
1195 coro_cctx *cctx;
1196
1197 ++cctx_count;
1198 New (0, cctx, 1, coro_cctx);
1199
1200 cctx->gen = cctx_gen;
1201 cctx->flags = 0;
1202 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1203
1204 return cctx;
1205}
1206
1207/* create a new cctx only suitable as source */
1208static coro_cctx *
1209cctx_new_empty ()
1210{
1211 coro_cctx *cctx = cctx_new ();
1212
1213 cctx->sptr = 0;
1214 coro_create (&cctx->cctx, 0, 0, 0, 0);
1215
1216 return cctx;
1217}
1218
1219/* create a new cctx suitable as destination/running a perl interpreter */
1220static coro_cctx *
1221cctx_new_run ()
1222{
1223 coro_cctx *cctx = cctx_new ();
1224 void *stack_start;
1225 size_t stack_size;
1226
1227#if HAVE_MMAP
1228 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1229 /* mmap supposedly does allocate-on-write for us */
1230 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1231
1232 if (cctx->sptr != (void *)-1)
1233 {
1234 #if CORO_STACKGUARD
1235 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1236 #endif
1237 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1238 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1239 cctx->flags |= CC_MAPPED;
1240 }
1241 else
1242#endif
1243 {
1244 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1245 New (0, cctx->sptr, cctx_stacksize, long);
1246
1247 if (!cctx->sptr)
1248 {
1249 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1250 _exit (EXIT_FAILURE);
1251 }
1252
1253 stack_start = cctx->sptr;
1254 stack_size = cctx->ssize;
1255 }
1256
1257 #if CORO_USE_VALGRIND
1258 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1259 #endif
1260
1261 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1262
1263 return cctx;
1264}
1265
1266static void
1267cctx_destroy (coro_cctx *cctx)
1268{
1269 if (!cctx)
1270 return;
1271
1272 assert (cctx != cctx_current);//D temporary
1273
1274 --cctx_count;
1275 coro_destroy (&cctx->cctx);
1276
1277 /* coro_transfer creates new, empty cctx's */
617 if (ctx->stack) 1278 if (cctx->sptr)
1279 {
1280 #if CORO_USE_VALGRIND
1281 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1282 #endif
1283
1284#if HAVE_MMAP
1285 if (cctx->flags & CC_MAPPED)
1286 munmap (cctx->sptr, cctx->ssize);
1287 else
1288#endif
1289 Safefree (cctx->sptr);
618 { 1290 }
619 ctx->cursp = 0;
620 1291
1292 Safefree (cctx);
1293}
1294
1295/* wether this cctx should be destructed */
1296#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1297
1298static coro_cctx *
1299cctx_get (pTHX)
1300{
1301 while (expect_true (cctx_first))
1302 {
1303 coro_cctx *cctx = cctx_first;
1304 cctx_first = cctx->next;
1305 --cctx_idle;
1306
1307 if (expect_true (!CCTX_EXPIRED (cctx)))
1308 return cctx;
1309
1310 cctx_destroy (cctx);
1311 }
1312
1313 return cctx_new_run ();
1314}
1315
1316static void
1317cctx_put (coro_cctx *cctx)
1318{
1319 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1320
1321 /* free another cctx if overlimit */
1322 if (expect_false (cctx_idle >= cctx_max_idle))
1323 {
1324 coro_cctx *first = cctx_first;
1325 cctx_first = first->next;
1326 --cctx_idle;
1327
1328 cctx_destroy (first);
1329 }
1330
1331 ++cctx_idle;
1332 cctx->next = cctx_first;
1333 cctx_first = cctx;
1334}
1335
1336/** coroutine switching *****************************************************/
1337
1338static void
1339transfer_check (pTHX_ struct coro *prev, struct coro *next)
1340{
1341 /* TODO: throwing up here is considered harmful */
1342
1343 if (expect_true (prev != next))
1344 {
1345 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1346 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1347
1348 if (expect_false (next->flags & CF_RUNNING))
1349 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1350
1351 if (expect_false (next->flags & CF_DESTROYED))
1352 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1353
1354#if !PERL_VERSION_ATLEAST (5,10,0)
1355 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1356 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1357#endif
1358 }
1359}
1360
1361/* always use the TRANSFER macro */
1362static void NOINLINE /* noinline so we have a fixed stackframe */
1363transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1364{
1365 dSTACKLEVEL;
1366
1367 /* sometimes transfer is only called to set idle_sp */
1368 if (expect_false (!prev))
1369 {
1370 cctx_current->idle_sp = STACKLEVEL;
1371 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1372 }
1373 else if (expect_true (prev != next))
1374 {
1375 coro_cctx *cctx_prev;
1376
1377 if (expect_false (prev->flags & CF_NEW))
1378 {
1379 /* create a new empty/source context */
1380 prev->flags &= ~CF_NEW;
1381 prev->flags |= CF_RUNNING;
1382 }
1383
1384 prev->flags &= ~CF_RUNNING;
1385 next->flags |= CF_RUNNING;
1386
1387 /* first get rid of the old state */
1388 save_perl (aTHX_ prev);
1389
1390 if (expect_false (next->flags & CF_NEW))
1391 {
1392 /* need to start coroutine */
1393 next->flags &= ~CF_NEW;
1394 /* setup coroutine call */
1395 coro_setup (aTHX_ next);
1396 }
1397 else
1398 load_perl (aTHX_ next);
1399
1400 assert (!prev->cctx);//D temporary
1401
1402 /* possibly untie and reuse the cctx */
1403 if (expect_true (
1404 cctx_current->idle_sp == STACKLEVEL
1405 && !(cctx_current->flags & CC_TRACE)
1406 && !force_cctx
1407 ))
1408 {
1409 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1410 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1411
1412 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1413 /* without this the next cctx_get might destroy the running cctx while still in use */
1414 if (expect_false (CCTX_EXPIRED (cctx_current)))
1415 if (expect_true (!next->cctx))
1416 next->cctx = cctx_get (aTHX);
1417
1418 cctx_put (cctx_current);
1419 }
1420 else
1421 prev->cctx = cctx_current;
1422
1423 ++next->usecount;
1424
1425 cctx_prev = cctx_current;
1426 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1427
1428 next->cctx = 0;
1429
1430 if (expect_false (cctx_prev != cctx_current))
1431 {
1432 cctx_prev->top_env = PL_top_env;
1433 PL_top_env = cctx_current->top_env;
1434 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1435 }
1436
1437 transfer_tail (aTHX);
1438 }
1439}
1440
1441#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1442#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1443
1444/** high level stuff ********************************************************/
1445
1446static int
1447coro_state_destroy (pTHX_ struct coro *coro)
1448{
1449 if (coro->flags & CF_DESTROYED)
1450 return 0;
1451
1452 if (coro->on_destroy)
1453 coro->on_destroy (aTHX_ coro);
1454
1455 coro->flags |= CF_DESTROYED;
1456
1457 if (coro->flags & CF_READY)
1458 {
1459 /* reduce nready, as destroying a ready coro effectively unreadies it */
1460 /* alternative: look through all ready queues and remove the coro */
1461 --coro_nready;
1462 }
1463 else
1464 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1465
1466 if (coro->mainstack && coro->mainstack != main_mainstack)
1467 {
1468 struct coro temp;
1469
1470 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1471
1472 save_perl (aTHX_ &temp);
1473 load_perl (aTHX_ coro);
1474
1475 coro_destruct (aTHX_ coro);
1476
1477 load_perl (aTHX_ &temp);
1478
1479 coro->slot = 0;
1480 }
1481
1482 cctx_destroy (coro->cctx);
1483 SvREFCNT_dec (coro->startcv);
1484 SvREFCNT_dec (coro->args);
1485 SvREFCNT_dec (CORO_THROW);
1486
1487 if (coro->next) coro->next->prev = coro->prev;
1488 if (coro->prev) coro->prev->next = coro->next;
1489 if (coro == coro_first) coro_first = coro->next;
1490
1491 return 1;
1492}
1493
1494static int
1495coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1496{
1497 struct coro *coro = (struct coro *)mg->mg_ptr;
1498 mg->mg_ptr = 0;
1499
1500 coro->hv = 0;
1501
1502 if (--coro->refcnt < 0)
1503 {
1504 coro_state_destroy (aTHX_ coro);
1505 Safefree (coro);
1506 }
1507
1508 return 0;
1509}
1510
1511static int
1512coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1513{
1514 struct coro *coro = (struct coro *)mg->mg_ptr;
1515
1516 ++coro->refcnt;
1517
1518 return 0;
1519}
1520
1521static MGVTBL coro_state_vtbl = {
1522 0, 0, 0, 0,
1523 coro_state_free,
1524 0,
1525#ifdef MGf_DUP
1526 coro_state_dup,
1527#else
1528# define MGf_DUP 0
1529#endif
1530};
1531
1532static void
1533prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1534{
1535 ta->prev = SvSTATE (prev_sv);
1536 ta->next = SvSTATE (next_sv);
1537 TRANSFER_CHECK (*ta);
1538}
1539
1540static void
1541api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1542{
1543 struct coro_transfer_args ta;
1544
1545 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1546 TRANSFER (ta, 1);
1547}
1548
1549/*****************************************************************************/
1550/* gensub: simple closure generation utility */
1551
1552#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1553
1554/* create a closure from XS, returns a code reference */
1555/* the arg can be accessed via GENSUB_ARG from the callback */
1556/* the callback must use dXSARGS/XSRETURN */
1557static SV *
1558gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1559{
1560 CV *cv = (CV *)newSV (0);
1561
1562 sv_upgrade ((SV *)cv, SVt_PVCV);
1563
1564 CvANON_on (cv);
1565 CvISXSUB_on (cv);
1566 CvXSUB (cv) = xsub;
1567 GENSUB_ARG = arg;
1568
1569 return newRV_noinc ((SV *)cv);
1570}
1571
1572/** Coro ********************************************************************/
1573
1574INLINE void
1575coro_enq (pTHX_ struct coro *coro)
1576{
1577 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1578}
1579
1580INLINE SV *
1581coro_deq (pTHX)
1582{
1583 int prio;
1584
1585 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1586 if (AvFILLp (coro_ready [prio]) >= 0)
1587 return av_shift (coro_ready [prio]);
1588
1589 return 0;
1590}
1591
1592static int
1593api_ready (pTHX_ SV *coro_sv)
1594{
1595 struct coro *coro;
1596 SV *sv_hook;
1597 void (*xs_hook)(void);
1598
1599 coro = SvSTATE (coro_sv);
1600
1601 if (coro->flags & CF_READY)
1602 return 0;
1603
1604 coro->flags |= CF_READY;
1605
1606 sv_hook = coro_nready ? 0 : coro_readyhook;
1607 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1608
1609 coro_enq (aTHX_ coro);
1610 ++coro_nready;
1611
1612 if (sv_hook)
1613 {
1614 dSP;
1615
1616 ENTER;
1617 SAVETMPS;
1618
621 PUSHMARK(SP); 1619 PUSHMARK (SP);
622 PUTBACK; 1620 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1621 call_sv (sv_hook, G_VOID | G_DISCARD);
624 1622
625 if (SvTRUE (ERRSV)) 1623 FREETMPS;
626 croak (NULL); 1624 LEAVE;
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 }
630 else
631 { 1625 }
632 UNOP myop;
633 1626
634 PL_op = (OP *)&myop; 1627 if (xs_hook)
1628 xs_hook ();
635 1629
636 Zero(&myop, 1, UNOP); 1630 return 1;
637 myop.op_next = Nullop; 1631}
638 myop.op_flags = OPf_WANT_VOID;
639 1632
640 PUSHMARK(SP); 1633static int
641 XPUSHs (sub_init); 1634api_is_ready (pTHX_ SV *coro_sv)
642 /* 1635{
643 * the next line is slightly wrong, as PL_op->op_next 1636 return !!(SvSTATE (coro_sv)->flags & CF_READY);
644 * is actually being executed so we skip the first op. 1637}
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = pp_entersub();
651 SPAGAIN;
652 1638
653 ENTER; /* necessary e.g. for dounwind */ 1639/* expects to own a reference to next->hv */
1640INLINE void
1641prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1642{
1643 SV *prev_sv = SvRV (coro_current);
1644
1645 ta->prev = SvSTATE_hv (prev_sv);
1646 ta->next = next;
1647
1648 TRANSFER_CHECK (*ta);
1649
1650 SvRV_set (coro_current, (SV *)next->hv);
1651
1652 free_coro_mortal (aTHX);
1653 coro_mortal = prev_sv;
1654}
1655
1656static void
1657prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1658{
1659 for (;;)
654 } 1660 {
655} 1661 SV *next_sv = coro_deq (aTHX);
656 1662
657static void 1663 if (expect_true (next_sv))
658continue_coro (void *arg)
659{
660 /*
661 * this is a _very_ stripped down perl interpreter ;)
662 */
663 Coro__State ctx = (Coro__State)arg;
664
665 /*FIXME*//* must set up top_env here */
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSP;
677 dSTACKLEVEL;
678
679 if (prev != next)
680 {
681 if (next->mainstack)
682 { 1664 {
683 SAVE (prev, flags); 1665 struct coro *next = SvSTATE_hv (next_sv);
684 LOAD (next);
685 1666
686 /* mark this state as in-use */ 1667 /* cannot transfer to destroyed coros, skip and look for next */
687 next->mainstack = 0; 1668 if (expect_false (next->flags & CF_DESTROYED))
688 next->tmps_ix = -2; 1669 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
689 1670 else
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 { 1671 {
693 if (!prev->stack) 1672 next->flags &= ~CF_READY;
694 allocate_stack (prev, 0); 1673 --coro_nready;
695 else if (prev->cursp != stacklevel 1674
696 && prev->stack->usecnt > 1) 1675 prepare_schedule_to (aTHX_ ta, next);
697 { 1676 break;
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 } 1677 }
714
715 } 1678 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else 1679 else
719 { 1680 {
720 SAVE (prev, -1); /* first get rid of the old state */ 1681 /* nothing to schedule: call the idle handler */
721 1682 if (SvROK (sv_idle)
722 if (flags & TRANSFER_SAVE_CCTXT) 1683 && SvOBJECT (SvRV (sv_idle)))
723 { 1684 {
724 if (!prev->stack) 1685 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
725 allocate_stack (prev, 0); 1686 api_ready (aTHX_ SvRV (sv_idle));
726 1687 --coro_nready;
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 }
744 } 1688 }
745 else 1689 else
746 setup_coro (next); 1690 {
1691 dSP;
1692
1693 ENTER;
1694 SAVETMPS;
1695
1696 PUSHMARK (SP);
1697 PUTBACK;
1698 call_sv (sv_idle, G_VOID | G_DISCARD);
1699
1700 FREETMPS;
1701 LEAVE;
1702 }
747 } 1703 }
748 } 1704 }
749
750 next->cursp = stacklevel;
751} 1705}
752 1706
1707INLINE void
1708prepare_cede (pTHX_ struct coro_transfer_args *ta)
1709{
1710 api_ready (aTHX_ coro_current);
1711 prepare_schedule (aTHX_ ta);
1712}
1713
1714INLINE void
1715prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1716{
1717 SV *prev = SvRV (coro_current);
1718
1719 if (coro_nready)
1720 {
1721 prepare_schedule (aTHX_ ta);
1722 api_ready (aTHX_ prev);
1723 }
1724 else
1725 prepare_nop (aTHX_ ta);
1726}
1727
1728static void
1729api_schedule (pTHX)
1730{
1731 struct coro_transfer_args ta;
1732
1733 prepare_schedule (aTHX_ &ta);
1734 TRANSFER (ta, 1);
1735}
1736
1737static void
1738api_schedule_to (pTHX_ SV *coro_sv)
1739{
1740 struct coro_transfer_args ta;
1741 struct coro *next = SvSTATE (coro_sv);
1742
1743 SvREFCNT_inc_NN (coro_sv);
1744 prepare_schedule_to (aTHX_ &ta, next);
1745}
1746
1747static int
1748api_cede (pTHX)
1749{
1750 struct coro_transfer_args ta;
1751
1752 prepare_cede (aTHX_ &ta);
1753
1754 if (expect_true (ta.prev != ta.next))
1755 {
1756 TRANSFER (ta, 1);
1757 return 1;
1758 }
1759 else
1760 return 0;
1761}
1762
1763static int
1764api_cede_notself (pTHX)
1765{
1766 if (coro_nready)
1767 {
1768 struct coro_transfer_args ta;
1769
1770 prepare_cede_notself (aTHX_ &ta);
1771 TRANSFER (ta, 1);
1772 return 1;
1773 }
1774 else
1775 return 0;
1776}
1777
1778static void
1779api_trace (pTHX_ SV *coro_sv, int flags)
1780{
1781 struct coro *coro = SvSTATE (coro_sv);
1782
1783 if (coro->flags & CF_RUNNING)
1784 croak ("cannot enable tracing on a running coroutine, caught");
1785
1786 if (flags & CC_TRACE)
1787 {
1788 if (!coro->cctx)
1789 coro->cctx = cctx_new_run ();
1790 else if (!(coro->cctx->flags & CC_TRACE))
1791 croak ("cannot enable tracing on coroutine with custom stack, caught");
1792
1793 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1794 }
1795 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1796 {
1797 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1798
1799 if (coro->flags & CF_RUNNING)
1800 PL_runops = RUNOPS_DEFAULT;
1801 else
1802 coro->slot->runops = RUNOPS_DEFAULT;
1803 }
1804}
1805
1806static void
1807coro_call_on_destroy (pTHX_ struct coro *coro)
1808{
1809 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1810 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1811
1812 if (on_destroyp)
1813 {
1814 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1815
1816 while (AvFILLp (on_destroy) >= 0)
1817 {
1818 dSP; /* don't disturb outer sp */
1819 SV *cb = av_pop (on_destroy);
1820
1821 PUSHMARK (SP);
1822
1823 if (statusp)
1824 {
1825 int i;
1826 AV *status = (AV *)SvRV (*statusp);
1827 EXTEND (SP, AvFILLp (status) + 1);
1828
1829 for (i = 0; i <= AvFILLp (status); ++i)
1830 PUSHs (AvARRAY (status)[i]);
1831 }
1832
1833 PUTBACK;
1834 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1835 }
1836 }
1837}
1838
1839static void
1840slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 int i;
1843 HV *hv = (HV *)SvRV (coro_current);
1844 AV *av = newAV ();
1845
1846 av_extend (av, items - 1);
1847 for (i = 0; i < items; ++i)
1848 av_push (av, SvREFCNT_inc_NN (arg [i]));
1849
1850 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1851
1852 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1853 api_ready (aTHX_ sv_manager);
1854
1855 frame->prepare = prepare_schedule;
1856 frame->check = slf_check_repeat;
1857}
1858
1859/*****************************************************************************/
1860/* async pool handler */
1861
1862static int
1863slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1864{
1865 HV *hv = (HV *)SvRV (coro_current);
1866 struct coro *coro = (struct coro *)frame->data;
1867
1868 if (!coro->invoke_cb)
1869 return 1; /* loop till we have invoke */
1870 else
1871 {
1872 hv_store (hv, "desc", sizeof ("desc") - 1,
1873 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1874
1875 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1876
1877 {
1878 dSP;
1879 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1880 PUTBACK;
1881 }
1882
1883 SvREFCNT_dec (GvAV (PL_defgv));
1884 GvAV (PL_defgv) = coro->invoke_av;
1885 coro->invoke_av = 0;
1886
1887 return 0;
1888 }
1889}
1890
1891static void
1892slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1893{
1894 HV *hv = (HV *)SvRV (coro_current);
1895 struct coro *coro = SvSTATE_hv ((SV *)hv);
1896
1897 if (expect_true (coro->saved_deffh))
1898 {
1899 /* subsequent iteration */
1900 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1901 coro->saved_deffh = 0;
1902
1903 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1904 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1905 {
1906 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1907 coro->invoke_av = newAV ();
1908
1909 frame->prepare = prepare_nop;
1910 }
1911 else
1912 {
1913 av_clear (GvAV (PL_defgv));
1914 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1915
1916 coro->prio = 0;
1917
1918 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1919 api_trace (aTHX_ coro_current, 0);
1920
1921 frame->prepare = prepare_schedule;
1922 av_push (av_async_pool, SvREFCNT_inc (hv));
1923 }
1924 }
1925 else
1926 {
1927 /* first iteration, simply fall through */
1928 frame->prepare = prepare_nop;
1929 }
1930
1931 frame->check = slf_check_pool_handler;
1932 frame->data = (void *)coro;
1933}
1934
1935/*****************************************************************************/
1936/* rouse callback */
1937
1938#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1939
1940static void
1941coro_rouse_callback (pTHX_ CV *cv)
1942{
1943 dXSARGS;
1944 SV *data = (SV *)GENSUB_ARG;
1945
1946 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1947 {
1948 /* first call, set args */
1949 AV *av = newAV ();
1950 SV *coro = SvRV (data);
1951
1952 SvRV_set (data, (SV *)av);
1953 api_ready (aTHX_ coro);
1954 SvREFCNT_dec (coro);
1955
1956 /* better take a full copy of the arguments */
1957 while (items--)
1958 av_store (av, items, newSVsv (ST (items)));
1959 }
1960
1961 XSRETURN_EMPTY;
1962}
1963
1964static int
1965slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1966{
1967 SV *data = (SV *)frame->data;
1968
1969 if (CORO_THROW)
1970 return 0;
1971
1972 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1973 return 1;
1974
1975 /* now push all results on the stack */
1976 {
1977 dSP;
1978 AV *av = (AV *)SvRV (data);
1979 int i;
1980
1981 EXTEND (SP, AvFILLp (av) + 1);
1982 for (i = 0; i <= AvFILLp (av); ++i)
1983 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1984
1985 /* we have stolen the elements, so ste length to zero and free */
1986 AvFILLp (av) = -1;
1987 av_undef (av);
1988
1989 PUTBACK;
1990 }
1991
1992 return 0;
1993}
1994
1995static void
1996slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1997{
1998 SV *cb;
1999
2000 if (items)
2001 cb = arg [0];
2002 else
2003 {
2004 struct coro *coro = SvSTATE_current;
2005
2006 if (!coro->rouse_cb)
2007 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2008
2009 cb = sv_2mortal (coro->rouse_cb);
2010 coro->rouse_cb = 0;
2011 }
2012
2013 if (!SvROK (cb)
2014 || SvTYPE (SvRV (cb)) != SVt_PVCV
2015 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2016 croak ("Coro::rouse_wait called with illegal callback argument,");
2017
2018 {
2019 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2020 SV *data = (SV *)GENSUB_ARG;
2021
2022 frame->data = (void *)data;
2023 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2024 frame->check = slf_check_rouse_wait;
2025 }
2026}
2027
2028static SV *
2029coro_new_rouse_cb (pTHX)
2030{
2031 HV *hv = (HV *)SvRV (coro_current);
2032 struct coro *coro = SvSTATE_hv (hv);
2033 SV *data = newRV_inc ((SV *)hv);
2034 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2035
2036 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2037 SvREFCNT_dec (data); /* magicext increases the refcount */
2038
2039 SvREFCNT_dec (coro->rouse_cb);
2040 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2041
2042 return cb;
2043}
2044
2045/*****************************************************************************/
2046/* schedule-like-function opcode (SLF) */
2047
2048static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2049static const CV *slf_cv;
2050static SV **slf_argv;
2051static int slf_argc, slf_arga; /* count, allocated */
2052static I32 slf_ax; /* top of stack, for restore */
2053
2054/* this restores the stack in the case we patched the entersub, to */
2055/* recreate the stack frame as perl will on following calls */
2056/* since entersub cleared the stack */
2057static OP *
2058pp_restore (pTHX)
2059{
2060 int i;
2061 SV **SP = PL_stack_base + slf_ax;
2062
2063 PUSHMARK (SP);
2064
2065 EXTEND (SP, slf_argc + 1);
2066
2067 for (i = 0; i < slf_argc; ++i)
2068 PUSHs (sv_2mortal (slf_argv [i]));
2069
2070 PUSHs ((SV *)CvGV (slf_cv));
2071
2072 RETURNOP (slf_restore.op_first);
2073}
2074
2075static void
2076slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2077{
2078 SV **arg = (SV **)slf_frame.data;
2079
2080 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2081}
2082
2083static void
2084slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (items != 2)
2087 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2088
2089 frame->prepare = slf_prepare_transfer;
2090 frame->check = slf_check_nop;
2091 frame->data = (void *)arg; /* let's hope it will stay valid */
2092}
2093
2094static void
2095slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 frame->prepare = prepare_schedule;
2098 frame->check = slf_check_nop;
2099}
2100
2101static void
2102slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2103{
2104 struct coro *next = (struct coro *)slf_frame.data;
2105
2106 SvREFCNT_inc_NN (next->hv);
2107 prepare_schedule_to (aTHX_ ta, next);
2108}
2109
2110static void
2111slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2112{
2113 if (!items)
2114 croak ("Coro::schedule_to expects a coroutine argument, caught");
2115
2116 frame->data = (void *)SvSTATE (arg [0]);
2117 frame->prepare = slf_prepare_schedule_to;
2118 frame->check = slf_check_nop;
2119}
2120
2121static void
2122slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2123{
2124 api_ready (aTHX_ SvRV (coro_current));
2125
2126 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2127}
2128
2129static void
2130slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2131{
2132 frame->prepare = prepare_cede;
2133 frame->check = slf_check_nop;
2134}
2135
2136static void
2137slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2138{
2139 frame->prepare = prepare_cede_notself;
2140 frame->check = slf_check_nop;
2141}
2142
2143/*
2144 * these not obviously related functions are all rolled into one
2145 * function to increase chances that they all will call transfer with the same
2146 * stack offset
2147 * SLF stands for "schedule-like-function".
2148 */
2149static OP *
2150pp_slf (pTHX)
2151{
2152 I32 checkmark; /* mark SP to see how many elements check has pushed */
2153
2154 /* set up the slf frame, unless it has already been set-up */
2155 /* the latter happens when a new coro has been started */
2156 /* or when a new cctx was attached to an existing coroutine */
2157 if (expect_true (!slf_frame.prepare))
2158 {
2159 /* first iteration */
2160 dSP;
2161 SV **arg = PL_stack_base + TOPMARK + 1;
2162 int items = SP - arg; /* args without function object */
2163 SV *gv = *sp;
2164
2165 /* do a quick consistency check on the "function" object, and if it isn't */
2166 /* for us, divert to the real entersub */
2167 if (SvTYPE (gv) != SVt_PVGV
2168 || !GvCV (gv)
2169 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2170 return PL_ppaddr[OP_ENTERSUB](aTHX);
2171
2172 if (!(PL_op->op_flags & OPf_STACKED))
2173 {
2174 /* ampersand-form of call, use @_ instead of stack */
2175 AV *av = GvAV (PL_defgv);
2176 arg = AvARRAY (av);
2177 items = AvFILLp (av) + 1;
2178 }
2179
2180 /* now call the init function, which needs to set up slf_frame */
2181 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2182 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2183
2184 /* pop args */
2185 SP = PL_stack_base + POPMARK;
2186
2187 PUTBACK;
2188 }
2189
2190 /* now that we have a slf_frame, interpret it! */
2191 /* we use a callback system not to make the code needlessly */
2192 /* complicated, but so we can run multiple perl coros from one cctx */
2193
2194 do
2195 {
2196 struct coro_transfer_args ta;
2197
2198 slf_frame.prepare (aTHX_ &ta);
2199 TRANSFER (ta, 0);
2200
2201 checkmark = PL_stack_sp - PL_stack_base;
2202 }
2203 while (slf_frame.check (aTHX_ &slf_frame));
2204
2205 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2206
2207 /* exception handling */
2208 if (expect_false (CORO_THROW))
2209 {
2210 SV *exception = sv_2mortal (CORO_THROW);
2211
2212 CORO_THROW = 0;
2213 sv_setsv (ERRSV, exception);
2214 croak (0);
2215 }
2216
2217 /* return value handling - mostly like entersub */
2218 /* make sure we put something on the stack in scalar context */
2219 if (GIMME_V == G_SCALAR)
2220 {
2221 dSP;
2222 SV **bot = PL_stack_base + checkmark;
2223
2224 if (sp == bot) /* too few, push undef */
2225 bot [1] = &PL_sv_undef;
2226 else if (sp != bot + 1) /* too many, take last one */
2227 bot [1] = *sp;
2228
2229 SP = bot + 1;
2230
2231 PUTBACK;
2232 }
2233
2234 return NORMAL;
2235}
2236
2237static void
2238api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2239{
2240 int i;
2241 SV **arg = PL_stack_base + ax;
2242 int items = PL_stack_sp - arg + 1;
2243
2244 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2245
2246 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2247 && PL_op->op_ppaddr != pp_slf)
2248 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2249
2250 CvFLAGS (cv) |= CVf_SLF;
2251 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2252 slf_cv = cv;
2253
2254 /* we patch the op, and then re-run the whole call */
2255 /* we have to put the same argument on the stack for this to work */
2256 /* and this will be done by pp_restore */
2257 slf_restore.op_next = (OP *)&slf_restore;
2258 slf_restore.op_type = OP_CUSTOM;
2259 slf_restore.op_ppaddr = pp_restore;
2260 slf_restore.op_first = PL_op;
2261
2262 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2263
2264 if (PL_op->op_flags & OPf_STACKED)
2265 {
2266 if (items > slf_arga)
2267 {
2268 slf_arga = items;
2269 free (slf_argv);
2270 slf_argv = malloc (slf_arga * sizeof (SV *));
2271 }
2272
2273 slf_argc = items;
2274
2275 for (i = 0; i < items; ++i)
2276 slf_argv [i] = SvREFCNT_inc (arg [i]);
2277 }
2278 else
2279 slf_argc = 0;
2280
2281 PL_op->op_ppaddr = pp_slf;
2282 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2283
2284 PL_op = (OP *)&slf_restore;
2285}
2286
2287/*****************************************************************************/
2288/* PerlIO::cede */
2289
2290typedef struct
2291{
2292 PerlIOBuf base;
2293 NV next, every;
2294} PerlIOCede;
2295
2296static IV
2297PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2298{
2299 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2300
2301 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2302 self->next = nvtime () + self->every;
2303
2304 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2305}
2306
2307static SV *
2308PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2309{
2310 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2311
2312 return newSVnv (self->every);
2313}
2314
2315static IV
2316PerlIOCede_flush (pTHX_ PerlIO *f)
2317{
2318 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2319 double now = nvtime ();
2320
2321 if (now >= self->next)
2322 {
2323 api_cede (aTHX);
2324 self->next = now + self->every;
2325 }
2326
2327 return PerlIOBuf_flush (aTHX_ f);
2328}
2329
2330static PerlIO_funcs PerlIO_cede =
2331{
2332 sizeof(PerlIO_funcs),
2333 "cede",
2334 sizeof(PerlIOCede),
2335 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2336 PerlIOCede_pushed,
2337 PerlIOBuf_popped,
2338 PerlIOBuf_open,
2339 PerlIOBase_binmode,
2340 PerlIOCede_getarg,
2341 PerlIOBase_fileno,
2342 PerlIOBuf_dup,
2343 PerlIOBuf_read,
2344 PerlIOBuf_unread,
2345 PerlIOBuf_write,
2346 PerlIOBuf_seek,
2347 PerlIOBuf_tell,
2348 PerlIOBuf_close,
2349 PerlIOCede_flush,
2350 PerlIOBuf_fill,
2351 PerlIOBase_eof,
2352 PerlIOBase_error,
2353 PerlIOBase_clearerr,
2354 PerlIOBase_setlinebuf,
2355 PerlIOBuf_get_base,
2356 PerlIOBuf_bufsiz,
2357 PerlIOBuf_get_ptr,
2358 PerlIOBuf_get_cnt,
2359 PerlIOBuf_set_ptrcnt,
2360};
2361
2362/*****************************************************************************/
2363/* Coro::Semaphore & Coro::Signal */
2364
2365static SV *
2366coro_waitarray_new (pTHX_ int count)
2367{
2368 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2369 AV *av = newAV ();
2370 SV **ary;
2371
2372 /* unfortunately, building manually saves memory */
2373 Newx (ary, 2, SV *);
2374 AvALLOC (av) = ary;
2375 /*AvARRAY (av) = ary;*/
2376 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2377 AvMAX (av) = 1;
2378 AvFILLp (av) = 0;
2379 ary [0] = newSViv (count);
2380
2381 return newRV_noinc ((SV *)av);
2382}
2383
2384/* semaphore */
2385
2386static void
2387coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2388{
2389 SV *count_sv = AvARRAY (av)[0];
2390 IV count = SvIVX (count_sv);
2391
2392 count += adjust;
2393 SvIVX (count_sv) = count;
2394
2395 /* now wake up as many waiters as are expected to lock */
2396 while (count > 0 && AvFILLp (av) > 0)
2397 {
2398 SV *cb;
2399
2400 /* swap first two elements so we can shift a waiter */
2401 AvARRAY (av)[0] = AvARRAY (av)[1];
2402 AvARRAY (av)[1] = count_sv;
2403 cb = av_shift (av);
2404
2405 if (SvOBJECT (cb))
2406 {
2407 api_ready (aTHX_ cb);
2408 --count;
2409 }
2410 else if (SvTYPE (cb) == SVt_PVCV)
2411 {
2412 dSP;
2413 PUSHMARK (SP);
2414 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2415 PUTBACK;
2416 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2417 }
2418
2419 SvREFCNT_dec (cb);
2420 }
2421}
2422
2423static void
2424coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2425{
2426 /* call $sem->adjust (0) to possibly wake up some other waiters */
2427 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2428}
2429
2430static int
2431slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2432{
2433 AV *av = (AV *)frame->data;
2434 SV *count_sv = AvARRAY (av)[0];
2435
2436 /* if we are about to throw, don't actually acquire the lock, just throw */
2437 if (CORO_THROW)
2438 return 0;
2439 else if (SvIVX (count_sv) > 0)
2440 {
2441 SvSTATE_current->on_destroy = 0;
2442
2443 if (acquire)
2444 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2445 else
2446 coro_semaphore_adjust (aTHX_ av, 0);
2447
2448 return 0;
2449 }
2450 else
2451 {
2452 int i;
2453 /* if we were woken up but can't down, we look through the whole */
2454 /* waiters list and only add us if we aren't in there already */
2455 /* this avoids some degenerate memory usage cases */
2456
2457 for (i = 1; i <= AvFILLp (av); ++i)
2458 if (AvARRAY (av)[i] == SvRV (coro_current))
2459 return 1;
2460
2461 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2462 return 1;
2463 }
2464}
2465
2466static int
2467slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2468{
2469 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2470}
2471
2472static int
2473slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2474{
2475 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2476}
2477
2478static void
2479slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2480{
2481 AV *av = (AV *)SvRV (arg [0]);
2482
2483 if (SvIVX (AvARRAY (av)[0]) > 0)
2484 {
2485 frame->data = (void *)av;
2486 frame->prepare = prepare_nop;
2487 }
2488 else
2489 {
2490 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2491
2492 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2493 frame->prepare = prepare_schedule;
2494
2495 /* to avoid race conditions when a woken-up coro gets terminated */
2496 /* we arrange for a temporary on_destroy that calls adjust (0) */
2497 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2498 }
2499}
2500
2501static void
2502slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2503{
2504 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2505 frame->check = slf_check_semaphore_down;
2506}
2507
2508static void
2509slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2510{
2511 if (items >= 2)
2512 {
2513 /* callback form */
2514 AV *av = (AV *)SvRV (arg [0]);
2515 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2516
2517 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2518
2519 if (SvIVX (AvARRAY (av)[0]) > 0)
2520 coro_semaphore_adjust (aTHX_ av, 0);
2521
2522 frame->prepare = prepare_nop;
2523 frame->check = slf_check_nop;
2524 }
2525 else
2526 {
2527 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2528 frame->check = slf_check_semaphore_wait;
2529 }
2530}
2531
2532/* signal */
2533
2534static void
2535coro_signal_wake (pTHX_ AV *av, int count)
2536{
2537 SvIVX (AvARRAY (av)[0]) = 0;
2538
2539 /* now signal count waiters */
2540 while (count > 0 && AvFILLp (av) > 0)
2541 {
2542 SV *cb;
2543
2544 /* swap first two elements so we can shift a waiter */
2545 cb = AvARRAY (av)[0];
2546 AvARRAY (av)[0] = AvARRAY (av)[1];
2547 AvARRAY (av)[1] = cb;
2548
2549 cb = av_shift (av);
2550
2551 api_ready (aTHX_ cb);
2552 sv_setiv (cb, 0); /* signal waiter */
2553 SvREFCNT_dec (cb);
2554
2555 --count;
2556 }
2557}
2558
2559static int
2560slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2561{
2562 /* if we are about to throw, also stop waiting */
2563 return SvROK ((SV *)frame->data) && !CORO_THROW;
2564}
2565
2566static void
2567slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2568{
2569 AV *av = (AV *)SvRV (arg [0]);
2570
2571 if (SvIVX (AvARRAY (av)[0]))
2572 {
2573 SvIVX (AvARRAY (av)[0]) = 0;
2574 frame->prepare = prepare_nop;
2575 frame->check = slf_check_nop;
2576 }
2577 else
2578 {
2579 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2580
2581 av_push (av, waiter);
2582
2583 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2584 frame->prepare = prepare_schedule;
2585 frame->check = slf_check_signal_wait;
2586 }
2587}
2588
2589/*****************************************************************************/
2590/* Coro::AIO */
2591
2592#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2593
2594/* helper storage struct */
2595struct io_state
2596{
2597 int errorno;
2598 I32 laststype; /* U16 in 5.10.0 */
2599 int laststatval;
2600 Stat_t statcache;
2601};
2602
2603static void
2604coro_aio_callback (pTHX_ CV *cv)
2605{
2606 dXSARGS;
2607 AV *state = (AV *)GENSUB_ARG;
2608 SV *coro = av_pop (state);
2609 SV *data_sv = newSV (sizeof (struct io_state));
2610
2611 av_extend (state, items - 1);
2612
2613 sv_upgrade (data_sv, SVt_PV);
2614 SvCUR_set (data_sv, sizeof (struct io_state));
2615 SvPOK_only (data_sv);
2616
2617 {
2618 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2619
2620 data->errorno = errno;
2621 data->laststype = PL_laststype;
2622 data->laststatval = PL_laststatval;
2623 data->statcache = PL_statcache;
2624 }
2625
2626 /* now build the result vector out of all the parameters and the data_sv */
2627 {
2628 int i;
2629
2630 for (i = 0; i < items; ++i)
2631 av_push (state, SvREFCNT_inc_NN (ST (i)));
2632 }
2633
2634 av_push (state, data_sv);
2635
2636 api_ready (aTHX_ coro);
2637 SvREFCNT_dec (coro);
2638 SvREFCNT_dec ((AV *)state);
2639}
2640
2641static int
2642slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2643{
2644 AV *state = (AV *)frame->data;
2645
2646 /* if we are about to throw, return early */
2647 /* this does not cancel the aio request, but at least */
2648 /* it quickly returns */
2649 if (CORO_THROW)
2650 return 0;
2651
2652 /* one element that is an RV? repeat! */
2653 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2654 return 1;
2655
2656 /* restore status */
2657 {
2658 SV *data_sv = av_pop (state);
2659 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2660
2661 errno = data->errorno;
2662 PL_laststype = data->laststype;
2663 PL_laststatval = data->laststatval;
2664 PL_statcache = data->statcache;
2665
2666 SvREFCNT_dec (data_sv);
2667 }
2668
2669 /* push result values */
2670 {
2671 dSP;
2672 int i;
2673
2674 EXTEND (SP, AvFILLp (state) + 1);
2675 for (i = 0; i <= AvFILLp (state); ++i)
2676 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2677
2678 PUTBACK;
2679 }
2680
2681 return 0;
2682}
2683
2684static void
2685slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2686{
2687 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2688 SV *coro_hv = SvRV (coro_current);
2689 struct coro *coro = SvSTATE_hv (coro_hv);
2690
2691 /* put our coroutine id on the state arg */
2692 av_push (state, SvREFCNT_inc_NN (coro_hv));
2693
2694 /* first see whether we have a non-zero priority and set it as AIO prio */
2695 if (coro->prio)
2696 {
2697 dSP;
2698
2699 static SV *prio_cv;
2700 static SV *prio_sv;
2701
2702 if (expect_false (!prio_cv))
2703 {
2704 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2705 prio_sv = newSViv (0);
2706 }
2707
2708 PUSHMARK (SP);
2709 sv_setiv (prio_sv, coro->prio);
2710 XPUSHs (prio_sv);
2711
2712 PUTBACK;
2713 call_sv (prio_cv, G_VOID | G_DISCARD);
2714 }
2715
2716 /* now call the original request */
2717 {
2718 dSP;
2719 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2720 int i;
2721
2722 PUSHMARK (SP);
2723
2724 /* first push all args to the stack */
2725 EXTEND (SP, items + 1);
2726
2727 for (i = 0; i < items; ++i)
2728 PUSHs (arg [i]);
2729
2730 /* now push the callback closure */
2731 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2732
2733 /* now call the AIO function - we assume our request is uncancelable */
2734 PUTBACK;
2735 call_sv ((SV *)req, G_VOID | G_DISCARD);
2736 }
2737
2738 /* now that the requets is going, we loop toll we have a result */
2739 frame->data = (void *)state;
2740 frame->prepare = prepare_schedule;
2741 frame->check = slf_check_aio_req;
2742}
2743
2744static void
2745coro_aio_req_xs (pTHX_ CV *cv)
2746{
2747 dXSARGS;
2748
2749 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2750
2751 XSRETURN_EMPTY;
2752}
2753
2754/*****************************************************************************/
2755
2756#if CORO_CLONE
2757# include "clone.c"
2758#endif
2759
753MODULE = Coro::State PACKAGE = Coro::State 2760MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
754 2761
755PROTOTYPES: ENABLE 2762PROTOTYPES: DISABLE
756 2763
757BOOT: 2764BOOT:
758{ /* {} necessary for stoopid perl-5.6.x */ 2765{
759 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2766#ifdef USE_ITHREADS
760 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2767# if CORO_PTHREAD
2768 coro_thx = PERL_GET_CONTEXT;
2769# endif
2770#endif
2771 BOOT_PAGESIZE;
2772
2773 cctx_current = cctx_new_empty ();
2774
2775 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2776 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2777
2778 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2779 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2780 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2781
2782 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2783 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2784 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2785
761 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2786 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
762 2787
763 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2788 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
764 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2789 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
765 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2790 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
766 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2791 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
767
768 if (!padlist_cache)
769 padlist_cache = newHV ();
770 2792
771 main_mainstack = PL_mainstack; 2793 main_mainstack = PL_mainstack;
772} 2794 main_top_env = PL_top_env;
773 2795
774Coro::State 2796 while (main_top_env->je_prev)
775_newprocess(args) 2797 main_top_env = main_top_env->je_prev;
776 SV * args 2798
777 PROTOTYPE: $ 2799 {
2800 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2801
2802 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2803 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2804
2805 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2806 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2807 }
2808
2809 coroapi.ver = CORO_API_VERSION;
2810 coroapi.rev = CORO_API_REVISION;
2811
2812 coroapi.transfer = api_transfer;
2813
2814 coroapi.sv_state = SvSTATE_;
2815 coroapi.execute_slf = api_execute_slf;
2816 coroapi.prepare_nop = prepare_nop;
2817 coroapi.prepare_schedule = prepare_schedule;
2818 coroapi.prepare_cede = prepare_cede;
2819 coroapi.prepare_cede_notself = prepare_cede_notself;
2820
2821 {
2822 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2823
2824 if (!svp) croak ("Time::HiRes is required");
2825 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2826
2827 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2828 }
2829
2830 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2831}
2832
2833SV *
2834new (char *klass, ...)
2835 ALIAS:
2836 Coro::new = 1
778 CODE: 2837 CODE:
779 Coro__State coro; 2838{
2839 struct coro *coro;
2840 MAGIC *mg;
2841 HV *hv;
2842 CV *cb;
2843 int i;
780 2844
781 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2845 if (items > 1)
782 croak ("Coro::State::_newprocess expects an arrayref");
783 2846 {
2847 cb = coro_sv_2cv (aTHX_ ST (1));
2848
2849 if (!ix)
2850 {
2851 if (CvISXSUB (cb))
2852 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2853
2854 if (!CvROOT (cb))
2855 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2856 }
2857 }
2858
784 New (0, coro, 1, struct coro); 2859 Newz (0, coro, 1, struct coro);
2860 coro->args = newAV ();
2861 coro->flags = CF_NEW;
785 2862
786 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2863 if (coro_first) coro_first->prev = coro;
787 coro->mainstack = 0; /* actual work is done inside transfer */ 2864 coro->next = coro_first;
788 coro->stack = 0; 2865 coro_first = coro;
789 2866
790 RETVAL = coro; 2867 coro->hv = hv = newHV ();
2868 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2869 mg->mg_flags |= MGf_DUP;
2870 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2871
2872 if (items > 1)
2873 {
2874 av_extend (coro->args, items - 1 + ix - 1);
2875
2876 if (ix)
2877 {
2878 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2879 cb = cv_coro_run;
2880 }
2881
2882 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2883
2884 for (i = 2; i < items; i++)
2885 av_push (coro->args, newSVsv (ST (i)));
2886 }
2887}
791 OUTPUT: 2888 OUTPUT:
792 RETVAL 2889 RETVAL
793 2890
794void 2891void
795transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2892transfer (...)
796 Coro::State_or_hashref prev
797 Coro::State_or_hashref next
798 int flags
799 PROTOTYPE: @ 2893 PROTOTYPE: $$
800 CODE: 2894 CODE:
801 PUTBACK; 2895 CORO_EXECUTE_SLF_XS (slf_init_transfer);
802 transfer (aTHX_ prev, next, flags); 2896
803 SPAGAIN; 2897bool
2898_destroy (SV *coro_sv)
2899 CODE:
2900 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2901 OUTPUT:
2902 RETVAL
804 2903
805void 2904void
806DESTROY(coro) 2905_exit (int code)
807 Coro::State coro 2906 PROTOTYPE: $
808 CODE: 2907 CODE:
2908 _exit (code);
809 2909
810 if (coro->mainstack && coro->mainstack != main_mainstack) 2910SV *
2911clone (Coro::State coro)
2912 CODE:
2913{
2914#if CORO_CLONE
2915 struct coro *ncoro = coro_clone (coro);
2916 MAGIC *mg;
2917 /* TODO: too much duplication */
2918 ncoro->hv = newHV ();
2919 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2920 mg->mg_flags |= MGf_DUP;
2921 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2922#else
2923 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2924#endif
2925}
2926 OUTPUT:
2927 RETVAL
2928
2929int
2930cctx_stacksize (int new_stacksize = 0)
2931 PROTOTYPE: ;$
2932 CODE:
2933 RETVAL = cctx_stacksize;
2934 if (new_stacksize)
2935 {
2936 cctx_stacksize = new_stacksize;
2937 ++cctx_gen;
2938 }
2939 OUTPUT:
2940 RETVAL
2941
2942int
2943cctx_max_idle (int max_idle = 0)
2944 PROTOTYPE: ;$
2945 CODE:
2946 RETVAL = cctx_max_idle;
2947 if (max_idle > 1)
2948 cctx_max_idle = max_idle;
2949 OUTPUT:
2950 RETVAL
2951
2952int
2953cctx_count ()
2954 PROTOTYPE:
2955 CODE:
2956 RETVAL = cctx_count;
2957 OUTPUT:
2958 RETVAL
2959
2960int
2961cctx_idle ()
2962 PROTOTYPE:
2963 CODE:
2964 RETVAL = cctx_idle;
2965 OUTPUT:
2966 RETVAL
2967
2968void
2969list ()
2970 PROTOTYPE:
2971 PPCODE:
2972{
2973 struct coro *coro;
2974 for (coro = coro_first; coro; coro = coro->next)
2975 if (coro->hv)
2976 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2977}
2978
2979void
2980call (Coro::State coro, SV *coderef)
2981 ALIAS:
2982 eval = 1
2983 CODE:
2984{
2985 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
811 { 2986 {
812 struct coro temp; 2987 struct coro temp;
813 2988
814 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2989 if (!(coro->flags & CF_RUNNING))
815 LOAD(aTHX_ coro); 2990 {
2991 PUTBACK;
2992 save_perl (aTHX_ &temp);
2993 load_perl (aTHX_ coro);
2994 }
816 2995
817 destroy_stacks (aTHX); 2996 {
2997 dSP;
2998 ENTER;
2999 SAVETMPS;
3000 PUTBACK;
3001 PUSHSTACK;
3002 PUSHMARK (SP);
818 3003
819 LOAD((&temp)); /* this will get rid of defsv etc.. */ 3004 if (ix)
3005 eval_sv (coderef, 0);
3006 else
3007 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
820 3008
821 coro->mainstack = 0; 3009 POPSTACK;
3010 SPAGAIN;
3011 FREETMPS;
3012 LEAVE;
3013 PUTBACK;
3014 }
3015
3016 if (!(coro->flags & CF_RUNNING))
3017 {
3018 save_perl (aTHX_ coro);
3019 load_perl (aTHX_ &temp);
3020 SPAGAIN;
3021 }
822 } 3022 }
3023}
823 3024
824 deallocate_stack (coro); 3025SV *
825 3026is_ready (Coro::State coro)
826 Safefree (coro); 3027 PROTOTYPE: $
3028 ALIAS:
3029 is_ready = CF_READY
3030 is_running = CF_RUNNING
3031 is_new = CF_NEW
3032 is_destroyed = CF_DESTROYED
3033 CODE:
3034 RETVAL = boolSV (coro->flags & ix);
3035 OUTPUT:
3036 RETVAL
827 3037
828void 3038void
829flush() 3039throw (Coro::State self, SV *throw = &PL_sv_undef)
830 CODE: 3040 PROTOTYPE: $;$
831#ifdef MAY_FLUSH 3041 CODE:
832 flush_padlist_cache (); 3042{
833#endif 3043 struct coro *current = SvSTATE_current;
3044 SV **throwp = self == current ? &CORO_THROW : &self->except;
3045 SvREFCNT_dec (*throwp);
3046 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3047}
834 3048
835void 3049void
836_exit(code) 3050api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
837 int code 3051 PROTOTYPE: $;$
3052 C_ARGS: aTHX_ coro, flags
3053
3054SV *
3055has_cctx (Coro::State coro)
838 PROTOTYPE: $ 3056 PROTOTYPE: $
839 CODE: 3057 CODE:
840#if defined(__GLIBC__) || _POSIX_C_SOURCE 3058 /* maybe manage the running flag differently */
841 _exit (code); 3059 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
842#else 3060 OUTPUT:
843 signal (SIGTERM, SIG_DFL); 3061 RETVAL
844 raise (SIGTERM);
845 exit (code);
846#endif
847 3062
848MODULE = Coro::State PACKAGE = Coro::Cont 3063int
3064is_traced (Coro::State coro)
3065 PROTOTYPE: $
3066 CODE:
3067 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3068 OUTPUT:
3069 RETVAL
849 3070
850# this is slightly dirty 3071UV
3072rss (Coro::State coro)
3073 PROTOTYPE: $
3074 ALIAS:
3075 usecount = 1
3076 CODE:
3077 switch (ix)
3078 {
3079 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3080 case 1: RETVAL = coro->usecount; break;
3081 }
3082 OUTPUT:
3083 RETVAL
851 3084
852void 3085void
853yield(...) 3086force_cctx ()
3087 PROTOTYPE:
3088 CODE:
3089 cctx_current->idle_sp = 0;
3090
3091void
3092swap_defsv (Coro::State self)
854 PROTOTYPE: @ 3093 PROTOTYPE: $
3094 ALIAS:
3095 swap_defav = 1
855 CODE: 3096 CODE:
856 static SV *returnstk; 3097 if (!self->slot)
857 SV *sv; 3098 croak ("cannot swap state with coroutine that has no saved state,");
858 AV *defav = GvAV (PL_defgv); 3099 else
859 struct coro *prev, *next; 3100 {
3101 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3102 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
860 3103
861 if (!returnstk) 3104 SV *tmp = *src; *src = *dst; *dst = tmp;
862 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3105 }
863 3106
864 /* set up @_ -- ugly */ 3107
865 av_clear (defav); 3108MODULE = Coro::State PACKAGE = Coro
3109
3110BOOT:
3111{
3112 int i;
3113
3114 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3115 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3116 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3117 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3118 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3119 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3120 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3121 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3122 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3123
3124 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3125 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3126 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3127 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3128
3129 coro_stash = gv_stashpv ("Coro", TRUE);
3130
3131 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3132 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3133 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3134 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3135 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3136 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3137
3138 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
3139 coro_ready[i] = newAV ();
3140
3141 {
3142 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3143
3144 coroapi.schedule = api_schedule;
3145 coroapi.schedule_to = api_schedule_to;
3146 coroapi.cede = api_cede;
3147 coroapi.cede_notself = api_cede_notself;
3148 coroapi.ready = api_ready;
3149 coroapi.is_ready = api_is_ready;
3150 coroapi.nready = coro_nready;
3151 coroapi.current = coro_current;
3152
3153 /*GCoroAPI = &coroapi;*/
3154 sv_setiv (sv, (IV)&coroapi);
3155 SvREADONLY_on (sv);
3156 }
3157}
3158
3159void
3160terminate (...)
3161 CODE:
3162 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3163
3164void
3165schedule (...)
3166 CODE:
3167 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3168
3169void
3170schedule_to (...)
3171 CODE:
3172 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3173
3174void
3175cede_to (...)
3176 CODE:
3177 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3178
3179void
3180cede (...)
3181 CODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_cede);
3183
3184void
3185cede_notself (...)
3186 CODE:
3187 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3188
3189void
3190_cancel (Coro::State self)
3191 CODE:
3192 coro_state_destroy (aTHX_ self);
3193 coro_call_on_destroy (aTHX_ self);
3194
3195void
3196_set_current (SV *current)
3197 PROTOTYPE: $
3198 CODE:
3199 SvREFCNT_dec (SvRV (coro_current));
3200 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3201
3202void
3203_set_readyhook (SV *hook)
3204 PROTOTYPE: $
3205 CODE:
3206 SvREFCNT_dec (coro_readyhook);
3207 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3208
3209int
3210prio (Coro::State coro, int newprio = 0)
3211 PROTOTYPE: $;$
3212 ALIAS:
3213 nice = 1
3214 CODE:
3215{
3216 RETVAL = coro->prio;
3217
3218 if (items > 1)
3219 {
3220 if (ix)
3221 newprio = coro->prio - newprio;
3222
3223 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3224 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3225
3226 coro->prio = newprio;
3227 }
3228}
3229 OUTPUT:
3230 RETVAL
3231
3232SV *
3233ready (SV *self)
3234 PROTOTYPE: $
3235 CODE:
3236 RETVAL = boolSV (api_ready (aTHX_ self));
3237 OUTPUT:
3238 RETVAL
3239
3240int
3241nready (...)
3242 PROTOTYPE:
3243 CODE:
3244 RETVAL = coro_nready;
3245 OUTPUT:
3246 RETVAL
3247
3248void
3249_pool_handler (...)
3250 CODE:
3251 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3252
3253void
3254async_pool (SV *cv, ...)
3255 PROTOTYPE: &@
3256 PPCODE:
3257{
3258 HV *hv = (HV *)av_pop (av_async_pool);
3259 AV *av = newAV ();
3260 SV *cb = ST (0);
3261 int i;
3262
866 av_fill (defav, items - 1); 3263 av_extend (av, items - 2);
867 while (items--) 3264 for (i = 1; i < items; ++i)
868 av_store (defav, items, SvREFCNT_inc (ST(items))); 3265 av_push (av, SvREFCNT_inc_NN (ST (i)));
869 3266
870 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 3267 if ((SV *)hv == &PL_sv_undef)
871 sv = av_pop ((AV *)SvRV (returnstk)); 3268 {
872 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 3269 PUSHMARK (SP);
873 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 3270 EXTEND (SP, 2);
3271 PUSHs (sv_Coro);
3272 PUSHs ((SV *)cv_pool_handler);
3273 PUTBACK;
3274 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3275 SPAGAIN;
3276
3277 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3278 }
3279
3280 {
3281 struct coro *coro = SvSTATE_hv (hv);
3282
3283 assert (!coro->invoke_cb);
3284 assert (!coro->invoke_av);
3285 coro->invoke_cb = SvREFCNT_inc (cb);
3286 coro->invoke_av = av;
3287 }
3288
3289 api_ready (aTHX_ (SV *)hv);
3290
3291 if (GIMME_V != G_VOID)
3292 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3293 else
874 SvREFCNT_dec (sv); 3294 SvREFCNT_dec (hv);
3295}
875 3296
876 transfer(aTHX_ prev, next, 0); 3297SV *
3298rouse_cb ()
3299 PROTOTYPE:
3300 CODE:
3301 RETVAL = coro_new_rouse_cb (aTHX);
3302 OUTPUT:
3303 RETVAL
877 3304
3305void
3306rouse_wait (...)
3307 PROTOTYPE: ;$
3308 PPCODE:
3309 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3310
3311
3312MODULE = Coro::State PACKAGE = PerlIO::cede
3313
3314BOOT:
3315 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3316
3317
3318MODULE = Coro::State PACKAGE = Coro::Semaphore
3319
3320SV *
3321new (SV *klass, SV *count = 0)
3322 CODE:
3323 RETVAL = sv_bless (
3324 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3325 GvSTASH (CvGV (cv))
3326 );
3327 OUTPUT:
3328 RETVAL
3329
3330# helper for Coro::Channel
3331SV *
3332_alloc (int count)
3333 CODE:
3334 RETVAL = coro_waitarray_new (aTHX_ count);
3335 OUTPUT:
3336 RETVAL
3337
3338SV *
3339count (SV *self)
3340 CODE:
3341 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3342 OUTPUT:
3343 RETVAL
3344
3345void
3346up (SV *self, int adjust = 1)
3347 ALIAS:
3348 adjust = 1
3349 CODE:
3350 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3351
3352void
3353down (...)
3354 CODE:
3355 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3356
3357void
3358wait (...)
3359 CODE:
3360 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3361
3362void
3363try (SV *self)
3364 PPCODE:
3365{
3366 AV *av = (AV *)SvRV (self);
3367 SV *count_sv = AvARRAY (av)[0];
3368 IV count = SvIVX (count_sv);
3369
3370 if (count > 0)
3371 {
3372 --count;
3373 SvIVX (count_sv) = count;
3374 XSRETURN_YES;
3375 }
3376 else
3377 XSRETURN_NO;
3378}
3379
3380void
3381waiters (SV *self)
3382 PPCODE:
3383{
3384 AV *av = (AV *)SvRV (self);
3385 int wcount = AvFILLp (av) + 1 - 1;
3386
3387 if (GIMME_V == G_SCALAR)
3388 XPUSHs (sv_2mortal (newSViv (wcount)));
3389 else
3390 {
3391 int i;
3392 EXTEND (SP, wcount);
3393 for (i = 1; i <= wcount; ++i)
3394 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3395 }
3396}
3397
3398MODULE = Coro::State PACKAGE = Coro::Signal
3399
3400SV *
3401new (SV *klass)
3402 CODE:
3403 RETVAL = sv_bless (
3404 coro_waitarray_new (aTHX_ 0),
3405 GvSTASH (CvGV (cv))
3406 );
3407 OUTPUT:
3408 RETVAL
3409
3410void
3411wait (...)
3412 CODE:
3413 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3414
3415void
3416broadcast (SV *self)
3417 CODE:
3418{
3419 AV *av = (AV *)SvRV (self);
3420 coro_signal_wake (aTHX_ av, AvFILLp (av));
3421}
3422
3423void
3424send (SV *self)
3425 CODE:
3426{
3427 AV *av = (AV *)SvRV (self);
3428
3429 if (AvFILLp (av))
3430 coro_signal_wake (aTHX_ av, 1);
3431 else
3432 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3433}
3434
3435IV
3436awaited (SV *self)
3437 CODE:
3438 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3439 OUTPUT:
3440 RETVAL
3441
3442
3443MODULE = Coro::State PACKAGE = Coro::AnyEvent
3444
3445BOOT:
3446 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3447
3448void
3449_schedule (...)
3450 CODE:
3451{
3452 static int incede;
3453
3454 api_cede_notself (aTHX);
3455
3456 ++incede;
3457 while (coro_nready >= incede && api_cede (aTHX))
3458 ;
3459
3460 sv_setsv (sv_activity, &PL_sv_undef);
3461 if (coro_nready >= incede)
3462 {
3463 PUSHMARK (SP);
3464 PUTBACK;
3465 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3466 }
3467
3468 --incede;
3469}
3470
3471
3472MODULE = Coro::State PACKAGE = Coro::AIO
3473
3474void
3475_register (char *target, char *proto, SV *req)
3476 CODE:
3477{
3478 CV *req_cv = coro_sv_2cv (aTHX_ req);
3479 /* newXSproto doesn't return the CV on 5.8 */
3480 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3481 sv_setpv ((SV *)slf_cv, proto);
3482 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3483}
3484

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