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Comparing Coro/Coro/State.xs (file contents):
Revision 1.16 by root, Wed Jul 25 04:26:55 2001 UTC vs.
Revision 1.312 by root, Thu Nov 20 03:10:30 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"
12
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
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.h> 28# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
13# else 32# else
14# undef HAVE_MMAP 33# undef HAVE_MMAP
15# endif 34# endif
16# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
17#endif 47#endif
18 48
19#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
20 52
21/* perl-related */ 53/* the maximum number of idle cctx that will be pooled */
22#define TRANSFER_SAVE_DEFAV 0x00000001 54static int cctx_max_idle = 4;
23#define TRANSFER_SAVE_DEFSV 0x00000002 55
24#define TRANSFER_SAVE_ERRSV 0x00000004 56#define PERL_VERSION_ATLEAST(a,b,c) \
25/* c-related */ 57 (PERL_REVISION > (a) \
26#define TRANSFER_SAVE_CCTXT 0x00000008 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
27#ifdef CORO_LAZY_STACK 113#ifndef CORO_STACKGUARD
28# define TRANSFER_LAZY_STACK 0x00000010 114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
29#else 127#else
30# define TRANSFER_LAZY_STACK 0x00000000 128# define dSTACKLEVEL volatile void *stacklevel
129# define STACKLEVEL ((void *)&stacklevel)
31#endif 130#endif
32 131
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)
35 133
36#define SUB_INIT "Coro::State::initialize" 134#if __GNUC__ >= 3
37#define UCORO_STATE "_coro_state" 135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
38 143
39/* The next macro should delcare a variable stacklevel that contains and approximation 144#define expect_false(expr) expect ((expr) != 0, 0)
40 * to the current C stack pointer. It's property is that it changes with each call 145#define expect_true(expr) expect ((expr) != 0, 1)
41 * and should be unique. */
42#define dSTACKLEVEL void *stacklevel = &stacklevel
43 146
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 147#define NOINLINE attribute ((noinline))
45 148
46/* this is actually not only the c stack but also c registers etc... */ 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
155# endif
156#endif
157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static SV *sv_async_pool_idle;
182static AV *av_async_pool;
183static SV *sv_Coro;
184static CV *cv_pool_handler;
185static CV *cv_coro_new;
186
187/* Coro::AnyEvent */
188static SV *sv_activity;
189
190static struct coro_cctx *cctx_first;
191static int cctx_count, cctx_idle;
192
193enum {
194 CC_MAPPED = 0x01,
195 CC_NOREUSE = 0x02, /* throw this away after tracing */
196 CC_TRACE = 0x04,
197 CC_TRACE_SUB = 0x08, /* trace sub calls */
198 CC_TRACE_LINE = 0x10, /* trace each statement */
199 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
200};
201
202/* this is a structure representing a c-level coroutine */
47typedef struct { 203typedef struct coro_cctx
48 int refcnt; /* pointer reference counter */ 204{
49 int usecnt; /* shared by how many coroutines */ 205 struct coro_cctx *next;
50 int gencnt; /* generation counter */
51 206
207 /* the stack */
208 void *sptr;
209 size_t ssize;
210
211 /* cpu state */
212 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
213 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
214 JMPENV *top_env;
52 coro_context cctx; 215 coro_context cctx;
53 216
54 void *sptr; 217 U32 gen;
55 long ssize; /* positive == mmap, otherwise malloc */ 218#if CORO_USE_VALGRIND
56} coro_stack; 219 int valgrind_id;
220#endif
221 unsigned char flags;
222} coro_cctx;
57 223
58static coro_stack main_stack = { 1, 0, 0 }; 224enum {
225 CF_RUNNING = 0x0001, /* coroutine is running */
226 CF_READY = 0x0002, /* coroutine is ready */
227 CF_NEW = 0x0004, /* has never been switched to */
228 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
229};
59 230
231/* the structure where most of the perl state is stored, overlaid on the cxstack */
232typedef struct
233{
234 SV *defsv;
235 AV *defav;
236 SV *errsv;
237 SV *irsgv;
238#define VAR(name,type) type name;
239# include "state.h"
240#undef VAR
241} perl_slots;
242
243#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
244
245/* this is a structure representing a perl-level coroutine */
60struct coro { 246struct coro {
61 /* the optional C context */ 247 /* the C coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 248 coro_cctx *cctx;
63 void *cursp;
64 int gencnt;
65 249
66 /* optionally saved, might be zero */ 250 /* state data */
67 AV *defav; 251 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
74 /* the stacks and related info (callchain etc..) */
75 PERL_SI *curstackinfo;
76 AV *curstack;
77 AV *mainstack; 252 AV *mainstack;
78 SV **stack_sp; 253 perl_slots *slot; /* basically the saved sp */
79 OP *op;
80 SV **curpad;
81 SV **stack_base;
82 SV **stack_max;
83 SV **tmps_stack;
84 I32 tmps_floor;
85 I32 tmps_ix;
86 I32 tmps_max;
87 I32 *markstack;
88 I32 *markstack_ptr;
89 I32 *markstack_max;
90 I32 *scopestack;
91 I32 scopestack_ix;
92 I32 scopestack_max;
93 ANY *savestack;
94 I32 savestack_ix;
95 I32 savestack_max;
96 OP **retstack;
97 I32 retstack_ix;
98 I32 retstack_max;
99 COP *curcop;
100 JMPENV start_env;
101 JMPENV *top_env;
102 254
255 CV *startcv; /* the CV to execute */
103 /* data associated with this coroutine (initial args) */ 256 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 257 int refcnt; /* coroutines are refcounted, yes */
258 int flags; /* CF_ flags */
259 HV *hv; /* the perl hash associated with this coro, if any */
260 void (*on_destroy)(pTHX_ struct coro *coro);
261
262 /* statistics */
263 int usecount; /* number of transfers to this coro */
264
265 /* coro process data */
266 int prio;
267 SV *except; /* exception to be thrown */
268 SV *rouse_cb;
269
270 /* async_pool */
271 SV *saved_deffh;
272 SV *invoke_cb;
273 AV *invoke_av;
274
275 /* linked list */
276 struct coro *next, *prev;
105}; 277};
106 278
107typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
109 281
110static AV *main_mainstack; /* used to differentiate between $main and others */ 282/* the following variables are effectively part of the perl context */
111static HV *coro_state_stash; 283/* and get copied between struct coro and these variables */
112static SV *ucoro_state_sv; 284/* the mainr easonw e don't support windows process emulation */
113static U32 ucoro_state_hash; 285static struct CoroSLF slf_frame; /* the current slf frame */
114static HV *padlist_cache;
115 286
116/* mostly copied from op.c:cv_clone2 */ 287/** Coro ********************************************************************/
117STATIC AV * 288
118clone_padlist (AV *protopadlist) 289#define PRIO_MAX 3
290#define PRIO_HIGH 1
291#define PRIO_NORMAL 0
292#define PRIO_LOW -1
293#define PRIO_IDLE -3
294#define PRIO_MIN -4
295
296/* for Coro.pm */
297static SV *coro_current;
298static SV *coro_readyhook;
299static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
300static CV *cv_coro_run, *cv_coro_terminate;
301static struct coro *coro_first;
302#define coro_nready coroapi.nready
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
119{ 308{
120 AV *av; 309#if PERL_VERSION_ATLEAST (5,10,0)
121 I32 ix; 310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 311 get_sv (name, create);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 312#endif
124 SV **pname = AvARRAY (protopad_name); 313 return get_sv (name, create);
125 SV **ppad = AvARRAY (protopad); 314}
126 I32 fname = AvFILLp (protopad_name); 315
127 I32 fpad = AvFILLp (protopad); 316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336/* may croak */
337INLINE CV *
338coro_sv_2cv (pTHX_ SV *sv)
339{
340 HV *st;
341 GV *gvp;
342 return sv_2cv (sv, &st, &gvp, 0);
343}
344
345static AV *
346coro_clone_padlist (pTHX_ CV *cv)
347{
348 AV *padlist = CvPADLIST (cv);
128 AV *newpadlist, *newpad_name, *newpad; 349 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);
138 350
139 newpadlist = newAV (); 351 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 352 AvREAL_off (newpadlist);
141 av_store (newpadlist, 0, (SV *) newpad_name); 353#if PERL_VERSION_ATLEAST (5,10,0)
354 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
355#else
356 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
357#endif
358 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
359 --AvFILLp (padlist);
360
361 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
142 av_store (newpadlist, 1, (SV *) newpad); 362 av_store (newpadlist, 1, (SV *)newpad);
143 363
144 av = newAV (); /* will be @_ */ 364 return newpadlist;
145 av_extend (av, 0); 365}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 366
149 for (ix = fpad; ix > 0; ix--) 367static void
368free_padlist (pTHX_ AV *padlist)
369{
370 /* may be during global destruction */
371 if (SvREFCNT (padlist))
150 { 372 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 373 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 374 while (i >= 0)
153 { 375 {
154 char *name = SvPVX (namesv); /* XXX */ 376 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 377 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 378 {
159 else
160 { /* our own lexical */
161 SV *sv; 379 SV *sv;
162 if (*name == '&') 380 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 381 SvREFCNT_dec (sv);
164 else if (*name == '@') 382
165 sv = (SV *) newAV (); 383 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 } 384 }
174 } 385 }
175 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 386
176 { 387 SvREFCNT_dec ((SV*)padlist);
177 npad[ix] = SvREFCNT_inc (ppad[ix]); 388 }
178 } 389}
179 else 390
180 { 391static int
181 SV *sv = NEWSV (0, 0); 392coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
182 SvPADTMP_on (sv); 393{
183 npad[ix] = sv; 394 AV *padlist;
184 } 395 AV *av = (AV *)mg->mg_obj;
396
397 /* casting is fun. */
398 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
399 free_padlist (aTHX_ padlist);
400
401 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
402
403 return 0;
404}
405
406#define CORO_MAGIC_type_cv 26
407#define CORO_MAGIC_type_state PERL_MAGIC_ext
408
409static MGVTBL coro_cv_vtbl = {
410 0, 0, 0, 0,
411 coro_cv_free
412};
413
414#define CORO_MAGIC_NN(sv, type) \
415 (expect_true (SvMAGIC (sv)->mg_type == type) \
416 ? SvMAGIC (sv) \
417 : mg_find (sv, type))
418
419#define CORO_MAGIC(sv, type) \
420 (expect_true (SvMAGIC (sv)) \
421 ? CORO_MAGIC_NN (sv, type) \
422 : 0)
423
424#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
425#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
426
427INLINE struct coro *
428SvSTATE_ (pTHX_ SV *coro)
429{
430 HV *stash;
431 MAGIC *mg;
432
433 if (SvROK (coro))
434 coro = SvRV (coro);
435
436 if (expect_false (SvTYPE (coro) != SVt_PVHV))
437 croak ("Coro::State object required");
438
439 stash = SvSTASH (coro);
440 if (expect_false (stash != coro_stash && stash != coro_state_stash))
185 } 441 {
186 442 /* very slow, but rare, check */
187#if 0 /* return -ENOTUNDERSTOOD */ 443 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
188 /* Now that vars are all in place, clone nested closures. */ 444 croak ("Coro::State object required");
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 } 445 }
446
447 mg = CORO_MAGIC_state (coro);
448 return (struct coro *)mg->mg_ptr;
449}
450
451#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
452
453/* faster than SvSTATE, but expects a coroutine hv */
454#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
455#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
456
457/* the next two functions merely cache the padlists */
458static void
459get_padlist (pTHX_ CV *cv)
460{
461 MAGIC *mg = CORO_MAGIC_cv (cv);
462 AV *av;
463
464 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
465 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
466 else
467 {
468#if CORO_PREFER_PERL_FUNCTIONS
469 /* this is probably cleaner? but also slower! */
470 /* in practise, it seems to be less stable */
471 CV *cp = Perl_cv_clone (aTHX_ cv);
472 CvPADLIST (cv) = CvPADLIST (cp);
473 CvPADLIST (cp) = 0;
474 SvREFCNT_dec (cp);
475#else
476 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
205#endif 477#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);
227 }
228}
229#endif
230
231/* the next two functions merely cache the padlists */
232STATIC void
233get_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
236
237 if (he && AvFILLp ((AV *)*he) >= 0)
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
239 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 {
250 SvREFCNT_dec (*he);
251 *he = (SV *)newAV ();
252 } 478 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 479}
256 480
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 481static void
482put_padlist (pTHX_ CV *cv)
483{
484 MAGIC *mg = CORO_MAGIC_cv (cv);
485 AV *av;
486
487 if (expect_false (!mg))
488 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
489
490 av = (AV *)mg->mg_obj;
491
492 if (expect_false (AvFILLp (av) >= AvMAX (av)))
493 av_extend (av, AvMAX (av) + 1);
494
495 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
496}
497
498/** load & save, init *******************************************************/
499
500static void
292load_state(pTHX_ Coro__State c) 501load_perl (pTHX_ Coro__State c)
293{ 502{
294 PL_dowarn = c->dowarn; 503 perl_slots *slot = c->slot;
504 c->slot = 0;
295 505
296 PL_curstackinfo = c->curstackinfo;
297 PL_curstack = c->curstack;
298 PL_mainstack = c->mainstack; 506 PL_mainstack = c->mainstack;
299 PL_stack_sp = c->stack_sp;
300 PL_op = c->op;
301 PL_curpad = c->curpad;
302 PL_stack_base = c->stack_base;
303 PL_stack_max = c->stack_max;
304 PL_tmps_stack = c->tmps_stack;
305 PL_tmps_floor = c->tmps_floor;
306 PL_tmps_ix = c->tmps_ix;
307 PL_tmps_max = c->tmps_max;
308 PL_markstack = c->markstack;
309 PL_markstack_ptr = c->markstack_ptr;
310 PL_markstack_max = c->markstack_max;
311 PL_scopestack = c->scopestack;
312 PL_scopestack_ix = c->scopestack_ix;
313 PL_scopestack_max = c->scopestack_max;
314 PL_savestack = c->savestack;
315 PL_savestack_ix = c->savestack_ix;
316 PL_savestack_max = c->savestack_max;
317 PL_retstack = c->retstack;
318 PL_retstack_ix = c->retstack_ix;
319 PL_retstack_max = c->retstack_max;
320 PL_curcop = c->curcop;
321 PL_start_env = c->start_env;
322 PL_top_env = c->top_env;
323 507
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 508 GvSV (PL_defgv) = slot->defsv;
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 509 GvAV (PL_defgv) = slot->defav;
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 510 GvSV (PL_errgv) = slot->errsv;
511 GvSV (irsgv) = slot->irsgv;
512
513 #define VAR(name,type) PL_ ## name = slot->name;
514 # include "state.h"
515 #undef VAR
327 516
328 { 517 {
329 dSP; 518 dSP;
519
330 CV *cv; 520 CV *cv;
331 521
332 /* now do the ugly restore mess */ 522 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 523 while (expect_true (cv = (CV *)POPs))
334 { 524 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 525 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 526 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 527 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 528 }
348 529
349 PUTBACK; 530 PUTBACK;
350 } 531 }
351}
352 532
533 slf_frame = c->slf_frame;
534 CORO_THROW = c->except;
535}
536
353static void 537static void
354save_state(pTHX_ Coro__State c, int flags) 538save_perl (pTHX_ Coro__State c)
355{ 539{
540 c->except = CORO_THROW;
541 c->slf_frame = slf_frame;
542
356 { 543 {
357 dSP; 544 dSP;
358 I32 cxix = cxstack_ix; 545 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 546 PERL_CONTEXT *ccstk = cxstack;
360 PERL_SI *top_si = PL_curstackinfo; 547 PERL_SI *top_si = PL_curstackinfo;
… …
362 /* 549 /*
363 * the worst thing you can imagine happens first - we have to save 550 * the worst thing you can imagine happens first - we have to save
364 * (and reinitialize) all cv's in the whole callchain :( 551 * (and reinitialize) all cv's in the whole callchain :(
365 */ 552 */
366 553
367 PUSHs (Nullsv); 554 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 555 /* this loop was inspired by pp_caller */
369 for (;;) 556 for (;;)
370 { 557 {
371 do 558 while (expect_true (cxix >= 0))
372 { 559 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 560 PERL_CONTEXT *cx = &ccstk[cxix--];
374 561
375 if (CxTYPE(cx) == CXt_SUB) 562 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376 { 563 {
377 CV *cv = cx->blk_sub.cv; 564 CV *cv = cx->blk_sub.cv;
565
378 if (CvDEPTH(cv)) 566 if (expect_true (CvDEPTH (cv)))
379 { 567 {
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); 568 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)); 569 PUSHs ((SV *)CvPADLIST (cv));
570 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 571 PUSHs ((SV *)cv);
396 572
397 get_padlist (cv); /* this is a monster */ 573 CvDEPTH (cv) = 0;
574 get_padlist (aTHX_ cv);
398 } 575 }
399 } 576 }
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 } 577 }
407 while (cxix >= 0);
408 578
409 if (top_si->si_type == PERLSI_MAIN) 579 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 580 break;
411 581
412 top_si = top_si->si_prev; 582 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 583 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 584 cxix = top_si->si_cxix;
415 } 585 }
416 586
417 PUTBACK; 587 PUTBACK;
418 } 588 }
419 589
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 590 /* allocate some space on the context stack for our purposes */
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 591 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 592 if (SLOT_COUNT >= 1) CXINC;
593 if (SLOT_COUNT >= 2) CXINC;
594 if (SLOT_COUNT >= 3) CXINC;
595 {
596 int i;
597 for (i = 3; i < SLOT_COUNT; ++i)
598 CXINC;
599 }
600 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 601
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
431 c->curstackinfo = PL_curstackinfo;
432 c->curstack = PL_curstack;
433 c->mainstack = PL_mainstack; 602 c->mainstack = PL_mainstack;
434 c->stack_sp = PL_stack_sp; 603
435 c->op = PL_op; 604 {
436 c->curpad = PL_curpad; 605 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
437 c->stack_base = PL_stack_base; 606
438 c->stack_max = PL_stack_max; 607 slot->defav = GvAV (PL_defgv);
439 c->tmps_stack = PL_tmps_stack; 608 slot->defsv = DEFSV;
440 c->tmps_floor = PL_tmps_floor; 609 slot->errsv = ERRSV;
441 c->tmps_ix = PL_tmps_ix; 610 slot->irsgv = GvSV (irsgv);
442 c->tmps_max = PL_tmps_max; 611
443 c->markstack = PL_markstack; 612 #define VAR(name,type) slot->name = PL_ ## name;
444 c->markstack_ptr = PL_markstack_ptr; 613 # include "state.h"
445 c->markstack_max = PL_markstack_max; 614 #undef VAR
446 c->scopestack = PL_scopestack; 615 }
447 c->scopestack_ix = PL_scopestack_ix;
448 c->scopestack_max = PL_scopestack_max;
449 c->savestack = PL_savestack;
450 c->savestack_ix = PL_savestack_ix;
451 c->savestack_max = PL_savestack_max;
452 c->retstack = PL_retstack;
453 c->retstack_ix = PL_retstack_ix;
454 c->retstack_max = PL_retstack_max;
455 c->curcop = PL_curcop;
456 c->start_env = PL_start_env;
457 c->top_env = PL_top_env;
458} 616}
459 617
460/* 618/*
461 * allocate various perl stacks. This is an exact copy 619 * allocate various perl stacks. This is almost an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 620 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 621 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 622 * not usually need a lot of stackspace.
465 */ 623 */
466STATIC void 624#if CORO_PREFER_PERL_FUNCTIONS
625# define coro_init_stacks(thx) init_stacks ()
626#else
627static void
467coro_init_stacks (pTHX) 628coro_init_stacks (pTHX)
468{ 629{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 630 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 631 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 632 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 633 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 634
474 PL_stack_base = AvARRAY(PL_curstack); 635 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 636 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 637 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 638
478 New(50,PL_tmps_stack,96,SV*); 639 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 640 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 641 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 642 PL_tmps_max = 32;
482 643
483 New(54,PL_markstack,16,I32); 644 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 645 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 646 PL_markstack_max = PL_markstack + 16;
486 647
648#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 649 SET_MARK_OFFSET;
650#endif
488 651
489 New(54,PL_scopestack,16,I32); 652 New(54,PL_scopestack,8,I32);
490 PL_scopestack_ix = 0; 653 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 654 PL_scopestack_max = 8;
492 655
493 New(54,PL_savestack,96,ANY); 656 New(54,PL_savestack,24,ANY);
494 PL_savestack_ix = 0; 657 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 658 PL_savestack_max = 24;
496 659
660#if !PERL_VERSION_ATLEAST (5,10,0)
497 New(54,PL_retstack,8,OP*); 661 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 662 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 663 PL_retstack_max = 4;
664#endif
500} 665}
666#endif
501 667
502/* 668/*
503 * destroy the stacks, the callchain etc... 669 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 670 */
506STATIC void 671static void
507destroy_stacks(pTHX) 672coro_destruct_stacks (pTHX)
508{ 673{
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) 674 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 675 PL_curstackinfo = PL_curstackinfo->si_next;
519 676
520 while (PL_curstackinfo) 677 while (PL_curstackinfo)
521 { 678 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 679 PERL_SI *p = PL_curstackinfo->si_prev;
523 680
524 { 681 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); 682 SvREFCNT_dec (PL_curstackinfo->si_stack);
683
533 Safefree(PL_curstackinfo->si_cxstack); 684 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 685 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 686 PL_curstackinfo = p;
536 } 687 }
537 688
538 Safefree(PL_tmps_stack); 689 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 690 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 691 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 692 Safefree (PL_savestack);
693#if !PERL_VERSION_ATLEAST (5,10,0)
542 Safefree(PL_retstack); 694 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 */
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 695#endif
696}
697
698#define CORO_RSS \
699 rss += sizeof (SYM (curstackinfo)); \
700 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
702 rss += SYM (tmps_max) * sizeof (SV *); \
703 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
704 rss += SYM (scopestack_max) * sizeof (I32); \
705 rss += SYM (savestack_max) * sizeof (ANY);
706
707static size_t
708coro_rss (pTHX_ struct coro *coro)
709{
710 size_t rss = sizeof (*coro);
711
712 if (coro->mainstack)
713 {
714 if (coro->flags & CF_RUNNING)
562 { 715 {
563 /*FIXME*//*D*//* reasonable stack size! */ 716 #define SYM(sym) PL_ ## sym
564 stack->ssize = -4096 * sizeof (long); 717 CORO_RSS;
565 New (0, stack->sptr, 4096, long); 718 #undef SYM
566 } 719 }
567 }
568 else 720 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 { 721 {
585#ifdef HAVE_MMAP 722 #define SYM(sym) coro->slot->sym
586 if (stack->ssize > 0 && stack->sptr) 723 CORO_RSS;
587 munmap (stack->sptr, stack->ssize); 724 #undef SYM
588 else 725 }
589#else 726 }
590 Safefree (stack->sptr); 727
728 return rss;
729}
730
731/** coroutine stack handling ************************************************/
732
733static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
734static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
736
737/* apparently < 5.8.8 */
738#ifndef MgPV_nolen_const
739#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
740 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
741 (const char*)(mg)->mg_ptr)
591#endif 742#endif
592 Safefree (stack); 743
744/*
745 * This overrides the default magic get method of %SIG elements.
746 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
747 * and instead of tryign to save and restore the hash elements, we just provide
748 * readback here.
749 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
750 * not expecting this to actually change the hook. This is a potential problem
751 * when a schedule happens then, but we ignore this.
752 */
753static int
754coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
768 return 0;
593 } 769 }
594 else if (ctx->gencnt == stack->gencnt) 770 }
595 --stack->usecnt; 771
772 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
773}
774
775static int
776coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
777{
778 const char *s = MgPV_nolen_const (mg);
779
780 if (*s == '_')
596 } 781 {
597} 782 SV **svp = 0;
598 783
784 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
785 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
786
787 if (svp)
788 {
789 SV *old = *svp;
790 *svp = 0;
791 SvREFCNT_dec (old);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
797}
798
599static void 799static int
600setup_coro (void *arg) 800coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = newSVsv (sv);
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
821}
822
823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
839coro_setup (pTHX_ struct coro *coro)
601{ 840{
602 /* 841 /*
603 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
604 */ 843 */
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); 844 coro_init_stacks (aTHX);
610 JMPENV_BOOTSTRAP;
611 SPAGAIN;
612 845
613 /*PL_curcop = 0;*/ 846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_type = OP_ENTERSUB;
877 myop.op_flags = OPf_WANT_VOID;
878
879 PUSHMARK (SP);
880 PUSHs ((SV *)coro->startcv);
881 PUTBACK;
882 PL_op = (OP *)&myop;
883 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 */
889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags etc. required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
904static void
905coro_destruct (pTHX_ struct coro *coro)
906{
907 if (!IN_DESTRUCT)
908 {
909 /* restore all saved variables and stuff */
910 LEAVE_SCOPE (0);
911 assert (PL_tmps_floor == -1);
912
913 /* free all temporaries */
914 FREETMPS;
915 assert (PL_tmps_ix == -1);
916
917 /* unwind all extra stacks */
918 POPSTACK_TO (PL_mainstack);
919
920 /* unwind main stack */
921 dounwind (-1);
922 }
923
924 SvREFCNT_dec (GvSV (PL_defgv));
614 SvREFCNT_dec (GvAV (PL_defgv)); 925 SvREFCNT_dec (GvAV (PL_defgv));
615 GvAV (PL_defgv) = ctx->args; 926 SvREFCNT_dec (GvSV (PL_errgv));
927 SvREFCNT_dec (PL_defoutgv);
928 SvREFCNT_dec (PL_rs);
929 SvREFCNT_dec (GvSV (irsgv));
616 930
931 SvREFCNT_dec (PL_diehook);
932 SvREFCNT_dec (PL_warnhook);
933
934 SvREFCNT_dec (coro->saved_deffh);
935 SvREFCNT_dec (coro->rouse_cb);
936 SvREFCNT_dec (coro->invoke_cb);
937 SvREFCNT_dec (coro->invoke_av);
938
939 coro_destruct_stacks (aTHX);
940}
941
942INLINE void
943free_coro_mortal (pTHX)
944{
945 if (expect_true (coro_mortal))
946 {
947 SvREFCNT_dec (coro_mortal);
948 coro_mortal = 0;
949 }
950}
951
952static int
953runops_trace (pTHX)
954{
955 COP *oldcop = 0;
956 int oldcxix = -2;
957 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
958 coro_cctx *cctx = coro->cctx;
959
960 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
961 {
962 PERL_ASYNC_CHECK ();
963
964 if (cctx->flags & CC_TRACE_ALL)
965 {
966 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
967 {
968 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
969 SV **bot, **top;
970 AV *av = newAV (); /* return values */
971 SV **cb;
972 dSP;
973
974 GV *gv = CvGV (cx->blk_sub.cv);
975 SV *fullname = sv_2mortal (newSV (0));
976 if (isGV (gv))
977 gv_efullname3 (fullname, gv, 0);
978
979 bot = PL_stack_base + cx->blk_oldsp + 1;
980 top = cx->blk_gimme == G_ARRAY ? SP + 1
981 : cx->blk_gimme == G_SCALAR ? bot + 1
982 : bot;
983
984 av_extend (av, top - bot);
985 while (bot < top)
986 av_push (av, SvREFCNT_inc_NN (*bot++));
987
988 PL_runops = RUNOPS_DEFAULT;
989 ENTER;
990 SAVETMPS;
991 EXTEND (SP, 3);
992 PUSHMARK (SP);
993 PUSHs (&PL_sv_no);
994 PUSHs (fullname);
995 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
996 PUTBACK;
997 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
998 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
999 SPAGAIN;
1000 FREETMPS;
1001 LEAVE;
1002 PL_runops = runops_trace;
1003 }
1004
1005 if (oldcop != PL_curcop)
1006 {
1007 oldcop = PL_curcop;
1008
1009 if (PL_curcop != &PL_compiling)
1010 {
1011 SV **cb;
1012
1013 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1014 {
1015 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1016
1017 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1018 {
1019 runops_proc_t old_runops = PL_runops;
1020 dSP;
1021 GV *gv = CvGV (cx->blk_sub.cv);
1022 SV *fullname = sv_2mortal (newSV (0));
1023
1024 if (isGV (gv))
1025 gv_efullname3 (fullname, gv, 0);
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PUSHMARK (SP);
1032 PUSHs (&PL_sv_yes);
1033 PUSHs (fullname);
1034 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043
1044 oldcxix = cxstack_ix;
1045 }
1046
1047 if (cctx->flags & CC_TRACE_LINE)
1048 {
1049 dSP;
1050
1051 PL_runops = RUNOPS_DEFAULT;
1052 ENTER;
1053 SAVETMPS;
1054 EXTEND (SP, 3);
1055 PL_runops = RUNOPS_DEFAULT;
1056 PUSHMARK (SP);
1057 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1058 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1059 PUTBACK;
1060 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1061 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1062 SPAGAIN;
1063 FREETMPS;
1064 LEAVE;
1065 PL_runops = runops_trace;
1066 }
1067 }
1068 }
1069 }
1070 }
1071
1072 TAINT_NOT;
1073 return 0;
1074}
1075
1076static struct coro_cctx *cctx_ssl_cctx;
1077static struct CoroSLF cctx_ssl_frame;
1078
1079static void
1080slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1081{
1082 ta->prev = (struct coro *)cctx_ssl_cctx;
1083 ta->next = 0;
1084}
1085
1086static int
1087slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1088{
1089 *frame = cctx_ssl_frame;
1090
1091 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1092}
1093
1094/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1095static void NOINLINE
1096cctx_prepare (pTHX_ coro_cctx *cctx)
1097{
1098 PL_top_env = &PL_start_env;
1099
1100 if (cctx->flags & CC_TRACE)
1101 PL_runops = runops_trace;
1102
1103 /* we already must be executing an SLF op, there is no other valid way
1104 * that can lead to creation of a new cctx */
1105 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1106 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1107
1108 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1109 cctx_ssl_cctx = cctx;
1110 cctx_ssl_frame = slf_frame;
1111
1112 slf_frame.prepare = slf_prepare_set_stacklevel;
1113 slf_frame.check = slf_check_set_stacklevel;
1114}
1115
1116/* the tail of transfer: execute stuff we can only do after a transfer */
1117INLINE void
1118transfer_tail (pTHX)
1119{
1120 free_coro_mortal (aTHX);
1121}
1122
1123/*
1124 * this is a _very_ stripped down perl interpreter ;)
1125 */
1126static void
1127cctx_run (void *arg)
1128{
1129#ifdef USE_ITHREADS
1130# if CORO_PTHREAD
1131 PERL_SET_CONTEXT (coro_thx);
1132# endif
1133#endif
1134 {
1135 dTHX;
1136
1137 /* normally we would need to skip the entersub here */
1138 /* not doing so will re-execute it, which is exactly what we want */
1139 /* PL_nop = PL_nop->op_next */
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150 /*
1151 * Unfortunately, there is no way to get at the return values of the
1152 * coro body here, as perl_run destroys these
1153 */
1154
1155 /*
1156 * If perl-run returns we assume exit() was being called or the coro
1157 * fell off the end, which seems to be the only valid (non-bug)
1158 * reason for perl_run to return. We try to exit by jumping to the
1159 * bootstrap-time "top" top_env, as we cannot restore the "main"
1160 * coroutine as Coro has no such concept
1161 */
1162 PL_top_env = main_top_env;
1163 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1164 }
1165}
1166
1167static coro_cctx *
1168cctx_new ()
1169{
1170 coro_cctx *cctx;
1171
1172 ++cctx_count;
1173 New (0, cctx, 1, coro_cctx);
1174
1175 cctx->gen = cctx_gen;
1176 cctx->flags = 0;
1177 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1178
1179 return cctx;
1180}
1181
1182/* create a new cctx only suitable as source */
1183static coro_cctx *
1184cctx_new_empty ()
1185{
1186 coro_cctx *cctx = cctx_new ();
1187
1188 cctx->sptr = 0;
1189 coro_create (&cctx->cctx, 0, 0, 0, 0);
1190
1191 return cctx;
1192}
1193
1194/* create a new cctx suitable as destination/running a perl interpreter */
1195static coro_cctx *
1196cctx_new_run ()
1197{
1198 coro_cctx *cctx = cctx_new ();
1199 void *stack_start;
1200 size_t stack_size;
1201
1202#if HAVE_MMAP
1203 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1204 /* mmap supposedly does allocate-on-write for us */
1205 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1206
1207 if (cctx->sptr != (void *)-1)
1208 {
1209 #if CORO_STACKGUARD
1210 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1211 #endif
1212 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1213 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1214 cctx->flags |= CC_MAPPED;
1215 }
1216 else
1217#endif
1218 {
1219 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1220 New (0, cctx->sptr, cctx_stacksize, long);
1221
1222 if (!cctx->sptr)
1223 {
1224 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1225 _exit (EXIT_FAILURE);
1226 }
1227
1228 stack_start = cctx->sptr;
1229 stack_size = cctx->ssize;
1230 }
1231
1232 #if CORO_USE_VALGRIND
1233 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1234 #endif
1235
1236 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1237
1238 return cctx;
1239}
1240
1241static void
1242cctx_destroy (coro_cctx *cctx)
1243{
1244 if (!cctx)
1245 return;
1246
1247 --cctx_count;
1248 coro_destroy (&cctx->cctx);
1249
1250 /* coro_transfer creates new, empty cctx's */
617 if (ctx->stack) 1251 if (cctx->sptr)
1252 {
1253 #if CORO_USE_VALGRIND
1254 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1255 #endif
1256
1257#if HAVE_MMAP
1258 if (cctx->flags & CC_MAPPED)
1259 munmap (cctx->sptr, cctx->ssize);
1260 else
1261#endif
1262 Safefree (cctx->sptr);
618 { 1263 }
619 ctx->cursp = 0;
620 1264
1265 Safefree (cctx);
1266}
1267
1268/* wether this cctx should be destructed */
1269#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1270
1271static coro_cctx *
1272cctx_get (pTHX)
1273{
1274 while (expect_true (cctx_first))
1275 {
1276 coro_cctx *cctx = cctx_first;
1277 cctx_first = cctx->next;
1278 --cctx_idle;
1279
1280 if (expect_true (!CCTX_EXPIRED (cctx)))
1281 return cctx;
1282
1283 cctx_destroy (cctx);
1284 }
1285
1286 return cctx_new_run ();
1287}
1288
1289static void
1290cctx_put (coro_cctx *cctx)
1291{
1292 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1293
1294 /* free another cctx if overlimit */
1295 if (expect_false (cctx_idle >= cctx_max_idle))
1296 {
1297 coro_cctx *first = cctx_first;
1298 cctx_first = first->next;
1299 --cctx_idle;
1300
1301 cctx_destroy (first);
1302 }
1303
1304 ++cctx_idle;
1305 cctx->next = cctx_first;
1306 cctx_first = cctx;
1307}
1308
1309/** coroutine switching *****************************************************/
1310
1311static void
1312transfer_check (pTHX_ struct coro *prev, struct coro *next)
1313{
1314 /* TODO: throwing up here is considered harmful */
1315
1316 if (expect_true (prev != next))
1317 {
1318 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1319 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1320
1321 if (expect_false (next->flags & CF_RUNNING))
1322 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1323
1324 if (expect_false (next->flags & CF_DESTROYED))
1325 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1326
1327#if !PERL_VERSION_ATLEAST (5,10,0)
1328 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1329 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1330#endif
1331 }
1332}
1333
1334/* always use the TRANSFER macro */
1335static void NOINLINE /* noinline so we have a fixed stackframe */
1336transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1337{
1338 dSTACKLEVEL;
1339
1340 /* sometimes transfer is only called to set idle_sp */
1341 if (expect_false (!next))
1342 {
1343 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1344 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1345 }
1346 else if (expect_true (prev != next))
1347 {
1348 coro_cctx *prev__cctx;
1349
1350 if (expect_false (prev->flags & CF_NEW))
1351 {
1352 /* create a new empty/source context */
1353 prev->cctx = cctx_new_empty ();
1354 prev->flags &= ~CF_NEW;
1355 prev->flags |= CF_RUNNING;
1356 }
1357
1358 prev->flags &= ~CF_RUNNING;
1359 next->flags |= CF_RUNNING;
1360
1361 /* first get rid of the old state */
1362 save_perl (aTHX_ prev);
1363
1364 if (expect_false (next->flags & CF_NEW))
1365 {
1366 /* need to start coroutine */
1367 next->flags &= ~CF_NEW;
1368 /* setup coroutine call */
1369 coro_setup (aTHX_ next);
1370 }
1371 else
1372 load_perl (aTHX_ next);
1373
1374 prev__cctx = prev->cctx;
1375
1376 /* possibly untie and reuse the cctx */
1377 if (expect_true (
1378 prev__cctx->idle_sp == STACKLEVEL
1379 && !(prev__cctx->flags & CC_TRACE)
1380 && !force_cctx
1381 ))
1382 {
1383 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1384 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1385
1386 prev->cctx = 0;
1387
1388 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1389 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1390 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1391 if (!next->cctx)
1392 next->cctx = cctx_get (aTHX);
1393
1394 cctx_put (prev__cctx);
1395 }
1396
1397 ++next->usecount;
1398
1399 if (expect_true (!next->cctx))
1400 next->cctx = cctx_get (aTHX);
1401
1402 if (expect_false (prev__cctx != next->cctx))
1403 {
1404 prev__cctx->top_env = PL_top_env;
1405 PL_top_env = next->cctx->top_env;
1406 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1407 }
1408
1409 transfer_tail (aTHX);
1410 }
1411}
1412
1413#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1414#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1415
1416/** high level stuff ********************************************************/
1417
1418static int
1419coro_state_destroy (pTHX_ struct coro *coro)
1420{
1421 if (coro->flags & CF_DESTROYED)
1422 return 0;
1423
1424 if (coro->on_destroy)
1425 coro->on_destroy (aTHX_ coro);
1426
1427 coro->flags |= CF_DESTROYED;
1428
1429 if (coro->flags & CF_READY)
1430 {
1431 /* reduce nready, as destroying a ready coro effectively unreadies it */
1432 /* alternative: look through all ready queues and remove the coro */
1433 --coro_nready;
1434 }
1435 else
1436 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1437
1438 if (coro->mainstack && coro->mainstack != main_mainstack)
1439 {
1440 struct coro temp;
1441
1442 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1443
1444 save_perl (aTHX_ &temp);
1445 load_perl (aTHX_ coro);
1446
1447 coro_destruct (aTHX_ coro);
1448
1449 load_perl (aTHX_ &temp);
1450
1451 coro->slot = 0;
1452 }
1453
1454 cctx_destroy (coro->cctx);
1455 SvREFCNT_dec (coro->startcv);
1456 SvREFCNT_dec (coro->args);
1457 SvREFCNT_dec (CORO_THROW);
1458
1459 if (coro->next) coro->next->prev = coro->prev;
1460 if (coro->prev) coro->prev->next = coro->next;
1461 if (coro == coro_first) coro_first = coro->next;
1462
1463 return 1;
1464}
1465
1466static int
1467coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1468{
1469 struct coro *coro = (struct coro *)mg->mg_ptr;
1470 mg->mg_ptr = 0;
1471
1472 coro->hv = 0;
1473
1474 if (--coro->refcnt < 0)
1475 {
1476 coro_state_destroy (aTHX_ coro);
1477 Safefree (coro);
1478 }
1479
1480 return 0;
1481}
1482
1483static int
1484coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1485{
1486 struct coro *coro = (struct coro *)mg->mg_ptr;
1487
1488 ++coro->refcnt;
1489
1490 return 0;
1491}
1492
1493static MGVTBL coro_state_vtbl = {
1494 0, 0, 0, 0,
1495 coro_state_free,
1496 0,
1497#ifdef MGf_DUP
1498 coro_state_dup,
1499#else
1500# define MGf_DUP 0
1501#endif
1502};
1503
1504static void
1505prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1506{
1507 ta->prev = SvSTATE (prev_sv);
1508 ta->next = SvSTATE (next_sv);
1509 TRANSFER_CHECK (*ta);
1510}
1511
1512static void
1513api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1514{
1515 struct coro_transfer_args ta;
1516
1517 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1518 TRANSFER (ta, 1);
1519}
1520
1521/*****************************************************************************/
1522/* gensub: simple closure generation utility */
1523
1524#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1525
1526/* create a closure from XS, returns a code reference */
1527/* the arg can be accessed via GENSUB_ARG from the callback */
1528/* the callback must use dXSARGS/XSRETURN */
1529static SV *
1530gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1531{
1532 CV *cv = (CV *)newSV (0);
1533
1534 sv_upgrade ((SV *)cv, SVt_PVCV);
1535
1536 CvANON_on (cv);
1537 CvISXSUB_on (cv);
1538 CvXSUB (cv) = xsub;
1539 GENSUB_ARG = arg;
1540
1541 return newRV_noinc ((SV *)cv);
1542}
1543
1544/** Coro ********************************************************************/
1545
1546INLINE void
1547coro_enq (pTHX_ struct coro *coro)
1548{
1549 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1550}
1551
1552INLINE SV *
1553coro_deq (pTHX)
1554{
1555 int prio;
1556
1557 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1558 if (AvFILLp (coro_ready [prio]) >= 0)
1559 return av_shift (coro_ready [prio]);
1560
1561 return 0;
1562}
1563
1564static int
1565api_ready (pTHX_ SV *coro_sv)
1566{
1567 struct coro *coro;
1568 SV *sv_hook;
1569 void (*xs_hook)(void);
1570
1571 if (SvROK (coro_sv))
1572 coro_sv = SvRV (coro_sv);
1573
1574 coro = SvSTATE (coro_sv);
1575
1576 if (coro->flags & CF_READY)
1577 return 0;
1578
1579 coro->flags |= CF_READY;
1580
1581 sv_hook = coro_nready ? 0 : coro_readyhook;
1582 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1583
1584 coro_enq (aTHX_ coro);
1585 ++coro_nready;
1586
1587 if (sv_hook)
1588 {
1589 dSP;
1590
1591 ENTER;
1592 SAVETMPS;
1593
621 PUSHMARK(SP); 1594 PUSHMARK (SP);
622 PUTBACK; 1595 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1596 call_sv (sv_hook, G_VOID | G_DISCARD);
624 croak ("FATAL: CCTXT coroutine returned!"); 1597
1598 FREETMPS;
1599 LEAVE;
1600 }
1601
1602 if (xs_hook)
1603 xs_hook ();
1604
1605 return 1;
1606}
1607
1608static int
1609api_is_ready (pTHX_ SV *coro_sv)
1610{
1611 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1612}
1613
1614INLINE void
1615prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1616{
1617 SV *prev_sv, *next_sv;
1618
1619 for (;;)
1620 {
1621 next_sv = coro_deq (aTHX);
1622
1623 /* nothing to schedule: call the idle handler */
1624 if (expect_false (!next_sv))
1625 {
1626 dSP;
1627
1628 ENTER;
1629 SAVETMPS;
1630
1631 PUSHMARK (SP);
1632 PUTBACK;
1633 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1634
1635 FREETMPS;
1636 LEAVE;
1637 continue;
1638 }
1639
1640 ta->next = SvSTATE_hv (next_sv);
1641
1642 /* cannot transfer to destroyed coros, skip and look for next */
1643 if (expect_false (ta->next->flags & CF_DESTROYED))
1644 {
1645 SvREFCNT_dec (next_sv);
1646 /* coro_nready has already been taken care of by destroy */
1647 continue;
1648 }
1649
1650 --coro_nready;
1651 break;
1652 }
1653
1654 /* free this only after the transfer */
1655 prev_sv = SvRV (coro_current);
1656 ta->prev = SvSTATE_hv (prev_sv);
1657 TRANSFER_CHECK (*ta);
1658 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1659 ta->next->flags &= ~CF_READY;
1660 SvRV_set (coro_current, next_sv);
1661
1662 free_coro_mortal (aTHX);
1663 coro_mortal = prev_sv;
1664}
1665
1666INLINE void
1667prepare_cede (pTHX_ struct coro_transfer_args *ta)
1668{
1669 api_ready (aTHX_ coro_current);
1670 prepare_schedule (aTHX_ ta);
1671}
1672
1673INLINE void
1674prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1675{
1676 SV *prev = SvRV (coro_current);
1677
1678 if (coro_nready)
1679 {
1680 prepare_schedule (aTHX_ ta);
1681 api_ready (aTHX_ prev);
625 } 1682 }
626 else 1683 else
1684 prepare_nop (aTHX_ ta);
1685}
1686
1687static void
1688api_schedule (pTHX)
1689{
1690 struct coro_transfer_args ta;
1691
1692 prepare_schedule (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694}
1695
1696static int
1697api_cede (pTHX)
1698{
1699 struct coro_transfer_args ta;
1700
1701 prepare_cede (aTHX_ &ta);
1702
1703 if (expect_true (ta.prev != ta.next))
1704 {
1705 TRANSFER (ta, 1);
1706 return 1;
1707 }
1708 else
1709 return 0;
1710}
1711
1712static int
1713api_cede_notself (pTHX)
1714{
1715 if (coro_nready)
1716 {
1717 struct coro_transfer_args ta;
1718
1719 prepare_cede_notself (aTHX_ &ta);
1720 TRANSFER (ta, 1);
1721 return 1;
1722 }
1723 else
1724 return 0;
1725}
1726
1727static void
1728api_trace (pTHX_ SV *coro_sv, int flags)
1729{
1730 struct coro *coro = SvSTATE (coro_sv);
1731
1732 if (flags & CC_TRACE)
1733 {
1734 if (!coro->cctx)
1735 coro->cctx = cctx_new_run ();
1736 else if (!(coro->cctx->flags & CC_TRACE))
1737 croak ("cannot enable tracing on coroutine with custom stack,");
1738
1739 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1740 }
1741 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1742 {
1743 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1744
1745 if (coro->flags & CF_RUNNING)
1746 PL_runops = RUNOPS_DEFAULT;
1747 else
1748 coro->slot->runops = RUNOPS_DEFAULT;
1749 }
1750}
1751
1752/*****************************************************************************/
1753/* async pool handler */
1754
1755static int
1756slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1757{
1758 HV *hv = (HV *)SvRV (coro_current);
1759 struct coro *coro = (struct coro *)frame->data;
1760
1761 if (!coro->invoke_cb)
1762 return 1; /* loop till we have invoke */
1763 else
1764 {
1765 int i, len;
1766
1767 hv_store (hv, "desc", sizeof ("desc") - 1,
1768 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1769
1770 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1771
1772 len = av_len (coro->invoke_av);
1773
627 { 1774 {
628 UNOP myop; 1775 dSP;
629 1776 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
630 PL_op = (OP *)&myop;
631
632 Zero(&myop, 1, UNOP);
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK; 1777 PUTBACK;
646 PL_op = pp_entersub();
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 } 1778 }
651}
652 1779
653static void 1780 SvREFCNT_dec (GvAV (PL_defgv));
654continue_coro (void *arg) 1781 GvAV (PL_defgv) = coro->invoke_av;
655{ 1782 coro->invoke_av = 0;
656 /*
657 * this is a _very_ stripped down perl interpreter ;)
658 */
659 Coro__State ctx = (Coro__State)arg;
660 1783
661 ctx->cursp = 0; 1784 return 0;
662 PL_op = PL_op->op_next;
663 CALLRUNOPS(aTHX);
664 /*NORETURN*/
665 abort ();
666}
667
668STATIC void
669transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
670{
671 dSP;
672 dSTACKLEVEL;
673
674 if (prev != next)
675 { 1785 }
676 if (next->mainstack) 1786}
1787
1788static void
1789slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1790{
1791 HV *hv = (HV *)SvRV (coro_current);
1792 struct coro *coro = SvSTATE_hv ((SV *)hv);
1793
1794 if (expect_true (coro->saved_deffh))
1795 {
1796 /* subsequent iteration */
1797 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1798 coro->saved_deffh = 0;
1799
1800 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1801 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
677 { 1802 {
678 SAVE (prev, flags); 1803 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
679 LOAD (next); 1804 coro->invoke_av = newAV ();
680 1805
681 /* mark this state as in-use */ 1806 frame->prepare = prepare_nop;
682 next->mainstack = 0;
683 next->tmps_ix = -2;
684
685 /* stacklevel changed? if yes, grab the stack for us! */
686 if (flags & TRANSFER_SAVE_CCTXT)
687 {
688 if (!prev->stack)
689 allocate_stack (prev, 0);
690 else if (prev->cursp != stacklevel
691 && prev->stack->usecnt > 1)
692 {
693 prev->gencnt = ++prev->stack->gencnt;
694 prev->stack->usecnt = 1;
695 }
696
697 /* has our stack been invalidated? */
698 if (next->stack && next->stack->gencnt != next->gencnt)
699 {
700 deallocate_stack (next);
701 allocate_stack (next, 1);
702 coro_create (&(next->stack->cctx),
703 continue_coro, (void *)next,
704 next->stack->sptr, labs (next->stack->ssize));
705 }
706
707 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
708 }
709
710 } 1807 }
711 else if (next->tmps_ix == -2)
712 croak ("tried to transfer to running coroutine");
713 else 1808 else
714 { 1809 {
715 SAVE (prev, -1); /* first get rid of the old state */ 1810 av_clear (GvAV (PL_defgv));
1811 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
716 1812
717 if (flags & TRANSFER_SAVE_CCTXT) 1813 coro->prio = 0;
718 {
719 if (!prev->stack)
720 allocate_stack (prev, 0);
721 1814
722 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1815 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
723 { 1816 api_trace (aTHX_ coro_current, 0);
724 setup_coro (next);
725 1817
726 prev->stack->refcnt++; 1818 frame->prepare = prepare_schedule;
727 prev->stack->usecnt++; 1819 av_push (av_async_pool, SvREFCNT_inc (hv));
728 next->stack = prev->stack;
729 next->gencnt = prev->gencnt;
730 }
731 else
732 {
733 allocate_stack (next, 1);
734 coro_create (&(next->stack->cctx),
735 setup_coro, (void *)next,
736 next->stack->sptr, labs (next->stack->ssize));
737 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738 }
739 }
740 else
741 setup_coro (next);
742 } 1820 }
743 } 1821 }
1822 else
1823 {
1824 /* first iteration, simply fall through */
1825 frame->prepare = prepare_nop;
1826 }
744 1827
745 next->cursp = stacklevel; 1828 frame->check = slf_check_pool_handler;
1829 frame->data = (void *)coro;
746} 1830}
747 1831
1832/*****************************************************************************/
1833/* rouse callback */
1834
1835#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1836
1837static void
1838coro_rouse_callback (pTHX_ CV *cv)
1839{
1840 dXSARGS;
1841 SV *data = (SV *)GENSUB_ARG;
1842
1843 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1844 {
1845 /* first call, set args */
1846 int i;
1847 AV *av = newAV ();
1848 SV *coro = SvRV (data);
1849
1850 SvRV_set (data, (SV *)av);
1851 api_ready (aTHX_ coro);
1852 SvREFCNT_dec (coro);
1853
1854 /* better take a full copy of the arguments */
1855 while (items--)
1856 av_store (av, items, newSVsv (ST (items)));
1857 }
1858
1859 XSRETURN_EMPTY;
1860}
1861
1862static int
1863slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1864{
1865 SV *data = (SV *)frame->data;
1866
1867 if (CORO_THROW)
1868 return 0;
1869
1870 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1871 return 1;
1872
1873 /* now push all results on the stack */
1874 {
1875 dSP;
1876 AV *av = (AV *)SvRV (data);
1877 int i;
1878
1879 EXTEND (SP, AvFILLp (av) + 1);
1880 for (i = 0; i <= AvFILLp (av); ++i)
1881 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1882
1883 /* we have stolen the elements, so ste length to zero and free */
1884 AvFILLp (av) = -1;
1885 av_undef (av);
1886
1887 PUTBACK;
1888 }
1889
1890 return 0;
1891}
1892
1893static void
1894slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1895{
1896 SV *cb;
1897
1898 if (items)
1899 cb = arg [0];
1900 else
1901 {
1902 struct coro *coro = SvSTATE_current;
1903
1904 if (!coro->rouse_cb)
1905 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1906
1907 cb = sv_2mortal (coro->rouse_cb);
1908 coro->rouse_cb = 0;
1909 }
1910
1911 if (!SvROK (cb)
1912 || SvTYPE (SvRV (cb)) != SVt_PVCV
1913 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1914 croak ("Coro::rouse_wait called with illegal callback argument,");
1915
1916 {
1917 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1918 SV *data = (SV *)GENSUB_ARG;
1919
1920 frame->data = (void *)data;
1921 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1922 frame->check = slf_check_rouse_wait;
1923 }
1924}
1925
1926static SV *
1927coro_new_rouse_cb (pTHX)
1928{
1929 HV *hv = (HV *)SvRV (coro_current);
1930 struct coro *coro = SvSTATE_hv (hv);
1931 SV *data = newRV_inc ((SV *)hv);
1932 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1933
1934 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1935 SvREFCNT_dec (data); /* magicext increases the refcount */
1936
1937 SvREFCNT_dec (coro->rouse_cb);
1938 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1939
1940 return cb;
1941}
1942
1943/*****************************************************************************/
1944/* schedule-like-function opcode (SLF) */
1945
1946static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1947static const CV *slf_cv;
1948static SV **slf_argv;
1949static int slf_argc, slf_arga; /* count, allocated */
1950static I32 slf_ax; /* top of stack, for restore */
1951
1952/* this restores the stack in the case we patched the entersub, to */
1953/* recreate the stack frame as perl will on following calls */
1954/* since entersub cleared the stack */
1955static OP *
1956pp_restore (pTHX)
1957{
1958 int i;
1959 SV **SP = PL_stack_base + slf_ax;
1960
1961 PUSHMARK (SP);
1962
1963 EXTEND (SP, slf_argc + 1);
1964
1965 for (i = 0; i < slf_argc; ++i)
1966 PUSHs (sv_2mortal (slf_argv [i]));
1967
1968 PUSHs ((SV *)CvGV (slf_cv));
1969
1970 RETURNOP (slf_restore.op_first);
1971}
1972
1973static void
1974slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1975{
1976 SV **arg = (SV **)slf_frame.data;
1977
1978 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1979}
1980
1981static void
1982slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1983{
1984 if (items != 2)
1985 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1986
1987 frame->prepare = slf_prepare_transfer;
1988 frame->check = slf_check_nop;
1989 frame->data = (void *)arg; /* let's hope it will stay valid */
1990}
1991
1992static void
1993slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1994{
1995 frame->prepare = prepare_schedule;
1996 frame->check = slf_check_nop;
1997}
1998
1999static void
2000slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2001{
2002 frame->prepare = prepare_cede;
2003 frame->check = slf_check_nop;
2004}
2005
2006static void
2007slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2008{
2009 frame->prepare = prepare_cede_notself;
2010 frame->check = slf_check_nop;
2011}
2012
2013/*
2014 * these not obviously related functions are all rolled into one
2015 * function to increase chances that they all will call transfer with the same
2016 * stack offset
2017 * SLF stands for "schedule-like-function".
2018 */
2019static OP *
2020pp_slf (pTHX)
2021{
2022 I32 checkmark; /* mark SP to see how many elements check has pushed */
2023
2024 /* set up the slf frame, unless it has already been set-up */
2025 /* the latter happens when a new coro has been started */
2026 /* or when a new cctx was attached to an existing coroutine */
2027 if (expect_true (!slf_frame.prepare))
2028 {
2029 /* first iteration */
2030 dSP;
2031 SV **arg = PL_stack_base + TOPMARK + 1;
2032 int items = SP - arg; /* args without function object */
2033 SV *gv = *sp;
2034
2035 /* do a quick consistency check on the "function" object, and if it isn't */
2036 /* for us, divert to the real entersub */
2037 if (SvTYPE (gv) != SVt_PVGV
2038 || !GvCV (gv)
2039 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2040 return PL_ppaddr[OP_ENTERSUB](aTHX);
2041
2042 if (!(PL_op->op_flags & OPf_STACKED))
2043 {
2044 /* ampersand-form of call, use @_ instead of stack */
2045 AV *av = GvAV (PL_defgv);
2046 arg = AvARRAY (av);
2047 items = AvFILLp (av) + 1;
2048 }
2049
2050 /* now call the init function, which needs to set up slf_frame */
2051 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2052 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2053
2054 /* pop args */
2055 SP = PL_stack_base + POPMARK;
2056
2057 PUTBACK;
2058 }
2059
2060 /* now that we have a slf_frame, interpret it! */
2061 /* we use a callback system not to make the code needlessly */
2062 /* complicated, but so we can run multiple perl coros from one cctx */
2063
2064 do
2065 {
2066 struct coro_transfer_args ta;
2067
2068 slf_frame.prepare (aTHX_ &ta);
2069 TRANSFER (ta, 0);
2070
2071 checkmark = PL_stack_sp - PL_stack_base;
2072 }
2073 while (slf_frame.check (aTHX_ &slf_frame));
2074
2075 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2076
2077 /* exception handling */
2078 if (expect_false (CORO_THROW))
2079 {
2080 SV *exception = sv_2mortal (CORO_THROW);
2081
2082 CORO_THROW = 0;
2083 sv_setsv (ERRSV, exception);
2084 croak (0);
2085 }
2086
2087 /* return value handling - mostly like entersub */
2088 /* make sure we put something on the stack in scalar context */
2089 if (GIMME_V == G_SCALAR)
2090 {
2091 dSP;
2092 SV **bot = PL_stack_base + checkmark;
2093
2094 if (sp == bot) /* too few, push undef */
2095 bot [1] = &PL_sv_undef;
2096 else if (sp != bot + 1) /* too many, take last one */
2097 bot [1] = *sp;
2098
2099 SP = bot + 1;
2100
2101 PUTBACK;
2102 }
2103
2104 return NORMAL;
2105}
2106
2107static void
2108api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2109{
2110 int i;
2111 SV **arg = PL_stack_base + ax;
2112 int items = PL_stack_sp - arg + 1;
2113
2114 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2115
2116 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2117 && PL_op->op_ppaddr != pp_slf)
2118 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2119
2120 CvFLAGS (cv) |= CVf_SLF;
2121 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2122 slf_cv = cv;
2123
2124 /* we patch the op, and then re-run the whole call */
2125 /* we have to put the same argument on the stack for this to work */
2126 /* and this will be done by pp_restore */
2127 slf_restore.op_next = (OP *)&slf_restore;
2128 slf_restore.op_type = OP_CUSTOM;
2129 slf_restore.op_ppaddr = pp_restore;
2130 slf_restore.op_first = PL_op;
2131
2132 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2133
2134 if (PL_op->op_flags & OPf_STACKED)
2135 {
2136 if (items > slf_arga)
2137 {
2138 slf_arga = items;
2139 free (slf_argv);
2140 slf_argv = malloc (slf_arga * sizeof (SV *));
2141 }
2142
2143 slf_argc = items;
2144
2145 for (i = 0; i < items; ++i)
2146 slf_argv [i] = SvREFCNT_inc (arg [i]);
2147 }
2148 else
2149 slf_argc = 0;
2150
2151 PL_op->op_ppaddr = pp_slf;
2152 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2153
2154 PL_op = (OP *)&slf_restore;
2155}
2156
2157/*****************************************************************************/
2158/* PerlIO::cede */
2159
2160typedef struct
2161{
2162 PerlIOBuf base;
2163 NV next, every;
2164} PerlIOCede;
2165
2166static IV
2167PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2168{
2169 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2170
2171 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2172 self->next = nvtime () + self->every;
2173
2174 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2175}
2176
2177static SV *
2178PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2179{
2180 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2181
2182 return newSVnv (self->every);
2183}
2184
2185static IV
2186PerlIOCede_flush (pTHX_ PerlIO *f)
2187{
2188 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2189 double now = nvtime ();
2190
2191 if (now >= self->next)
2192 {
2193 api_cede (aTHX);
2194 self->next = now + self->every;
2195 }
2196
2197 return PerlIOBuf_flush (aTHX_ f);
2198}
2199
2200static PerlIO_funcs PerlIO_cede =
2201{
2202 sizeof(PerlIO_funcs),
2203 "cede",
2204 sizeof(PerlIOCede),
2205 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2206 PerlIOCede_pushed,
2207 PerlIOBuf_popped,
2208 PerlIOBuf_open,
2209 PerlIOBase_binmode,
2210 PerlIOCede_getarg,
2211 PerlIOBase_fileno,
2212 PerlIOBuf_dup,
2213 PerlIOBuf_read,
2214 PerlIOBuf_unread,
2215 PerlIOBuf_write,
2216 PerlIOBuf_seek,
2217 PerlIOBuf_tell,
2218 PerlIOBuf_close,
2219 PerlIOCede_flush,
2220 PerlIOBuf_fill,
2221 PerlIOBase_eof,
2222 PerlIOBase_error,
2223 PerlIOBase_clearerr,
2224 PerlIOBase_setlinebuf,
2225 PerlIOBuf_get_base,
2226 PerlIOBuf_bufsiz,
2227 PerlIOBuf_get_ptr,
2228 PerlIOBuf_get_cnt,
2229 PerlIOBuf_set_ptrcnt,
2230};
2231
2232/*****************************************************************************/
2233/* Coro::Semaphore & Coro::Signal */
2234
2235static SV *
2236coro_waitarray_new (pTHX_ int count)
2237{
2238 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2239 AV *av = newAV ();
2240 SV **ary;
2241
2242 /* unfortunately, building manually saves memory */
2243 Newx (ary, 2, SV *);
2244 AvALLOC (av) = ary;
2245 /*AvARRAY (av) = ary;*/
2246 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2247 AvMAX (av) = 1;
2248 AvFILLp (av) = 0;
2249 ary [0] = newSViv (count);
2250
2251 return newRV_noinc ((SV *)av);
2252}
2253
2254/* semaphore */
2255
2256static void
2257coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2258{
2259 SV *count_sv = AvARRAY (av)[0];
2260 IV count = SvIVX (count_sv);
2261
2262 count += adjust;
2263 SvIVX (count_sv) = count;
2264
2265 /* now wake up as many waiters as are expected to lock */
2266 while (count > 0 && AvFILLp (av) > 0)
2267 {
2268 SV *cb;
2269
2270 /* swap first two elements so we can shift a waiter */
2271 AvARRAY (av)[0] = AvARRAY (av)[1];
2272 AvARRAY (av)[1] = count_sv;
2273 cb = av_shift (av);
2274
2275 if (SvOBJECT (cb))
2276 {
2277 api_ready (aTHX_ cb);
2278 --count;
2279 }
2280 else if (SvTYPE (cb) == SVt_PVCV)
2281 {
2282 dSP;
2283 PUSHMARK (SP);
2284 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2285 PUTBACK;
2286 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2287 }
2288
2289 SvREFCNT_dec (cb);
2290 }
2291}
2292
2293static void
2294coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2295{
2296 /* call $sem->adjust (0) to possibly wake up some other waiters */
2297 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2298}
2299
2300static int
2301slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2302{
2303 AV *av = (AV *)frame->data;
2304 SV *count_sv = AvARRAY (av)[0];
2305
2306 /* if we are about to throw, don't actually acquire the lock, just throw */
2307 if (CORO_THROW)
2308 return 0;
2309 else if (SvIVX (count_sv) > 0)
2310 {
2311 SvSTATE_current->on_destroy = 0;
2312
2313 if (acquire)
2314 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2315 else
2316 coro_semaphore_adjust (aTHX_ av, 0);
2317
2318 return 0;
2319 }
2320 else
2321 {
2322 int i;
2323 /* if we were woken up but can't down, we look through the whole */
2324 /* waiters list and only add us if we aren't in there already */
2325 /* this avoids some degenerate memory usage cases */
2326
2327 for (i = 1; i <= AvFILLp (av); ++i)
2328 if (AvARRAY (av)[i] == SvRV (coro_current))
2329 return 1;
2330
2331 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2332 return 1;
2333 }
2334}
2335
2336static int
2337slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2338{
2339 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2340}
2341
2342static int
2343slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2344{
2345 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2346}
2347
2348static void
2349slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 AV *av = (AV *)SvRV (arg [0]);
2352
2353 if (SvIVX (AvARRAY (av)[0]) > 0)
2354 {
2355 frame->data = (void *)av;
2356 frame->prepare = prepare_nop;
2357 }
2358 else
2359 {
2360 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2361
2362 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2363 frame->prepare = prepare_schedule;
2364
2365 /* to avoid race conditions when a woken-up coro gets terminated */
2366 /* we arrange for a temporary on_destroy that calls adjust (0) */
2367 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2368 }
2369}
2370
2371static void
2372slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2373{
2374 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2375 frame->check = slf_check_semaphore_down;
2376}
2377
2378static void
2379slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2380{
2381 if (items >= 2)
2382 {
2383 /* callback form */
2384 AV *av = (AV *)SvRV (arg [0]);
2385 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2386
2387 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2388
2389 if (SvIVX (AvARRAY (av)[0]) > 0)
2390 coro_semaphore_adjust (aTHX_ av, 0);
2391
2392 frame->prepare = prepare_nop;
2393 frame->check = slf_check_nop;
2394 }
2395 else
2396 {
2397 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2398 frame->check = slf_check_semaphore_wait;
2399 }
2400}
2401
2402/* signal */
2403
2404static void
2405coro_signal_wake (pTHX_ AV *av, int count)
2406{
2407 SvIVX (AvARRAY (av)[0]) = 0;
2408
2409 /* now signal count waiters */
2410 while (count > 0 && AvFILLp (av) > 0)
2411 {
2412 SV *cb;
2413
2414 /* swap first two elements so we can shift a waiter */
2415 cb = AvARRAY (av)[0];
2416 AvARRAY (av)[0] = AvARRAY (av)[1];
2417 AvARRAY (av)[1] = cb;
2418
2419 cb = av_shift (av);
2420
2421 api_ready (aTHX_ cb);
2422 sv_setiv (cb, 0); /* signal waiter */
2423 SvREFCNT_dec (cb);
2424
2425 --count;
2426 }
2427}
2428
2429static int
2430slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2431{
2432 /* if we are about to throw, also stop waiting */
2433 return SvROK ((SV *)frame->data) && !CORO_THROW;
2434}
2435
2436static void
2437slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2438{
2439 AV *av = (AV *)SvRV (arg [0]);
2440
2441 if (SvIVX (AvARRAY (av)[0]))
2442 {
2443 SvIVX (AvARRAY (av)[0]) = 0;
2444 frame->prepare = prepare_nop;
2445 frame->check = slf_check_nop;
2446 }
2447 else
2448 {
2449 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2450
2451 av_push (av, waiter);
2452
2453 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2454 frame->prepare = prepare_schedule;
2455 frame->check = slf_check_signal_wait;
2456 }
2457}
2458
2459/*****************************************************************************/
2460/* Coro::AIO */
2461
2462#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2463
2464/* helper storage struct */
2465struct io_state
2466{
2467 int errorno;
2468 I32 laststype; /* U16 in 5.10.0 */
2469 int laststatval;
2470 Stat_t statcache;
2471};
2472
2473static void
2474coro_aio_callback (pTHX_ CV *cv)
2475{
2476 dXSARGS;
2477 AV *state = (AV *)GENSUB_ARG;
2478 SV *coro = av_pop (state);
2479 SV *data_sv = newSV (sizeof (struct io_state));
2480
2481 av_extend (state, items - 1);
2482
2483 sv_upgrade (data_sv, SVt_PV);
2484 SvCUR_set (data_sv, sizeof (struct io_state));
2485 SvPOK_only (data_sv);
2486
2487 {
2488 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2489
2490 data->errorno = errno;
2491 data->laststype = PL_laststype;
2492 data->laststatval = PL_laststatval;
2493 data->statcache = PL_statcache;
2494 }
2495
2496 /* now build the result vector out of all the parameters and the data_sv */
2497 {
2498 int i;
2499
2500 for (i = 0; i < items; ++i)
2501 av_push (state, SvREFCNT_inc_NN (ST (i)));
2502 }
2503
2504 av_push (state, data_sv);
2505
2506 api_ready (aTHX_ coro);
2507 SvREFCNT_dec (coro);
2508 SvREFCNT_dec ((AV *)state);
2509}
2510
2511static int
2512slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2513{
2514 AV *state = (AV *)frame->data;
2515
2516 /* if we are about to throw, return early */
2517 /* this does not cancel the aio request, but at least */
2518 /* it quickly returns */
2519 if (CORO_THROW)
2520 return 0;
2521
2522 /* one element that is an RV? repeat! */
2523 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2524 return 1;
2525
2526 /* restore status */
2527 {
2528 SV *data_sv = av_pop (state);
2529 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2530
2531 errno = data->errorno;
2532 PL_laststype = data->laststype;
2533 PL_laststatval = data->laststatval;
2534 PL_statcache = data->statcache;
2535
2536 SvREFCNT_dec (data_sv);
2537 }
2538
2539 /* push result values */
2540 {
2541 dSP;
2542 int i;
2543
2544 EXTEND (SP, AvFILLp (state) + 1);
2545 for (i = 0; i <= AvFILLp (state); ++i)
2546 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2547
2548 PUTBACK;
2549 }
2550
2551 return 0;
2552}
2553
2554static void
2555slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2556{
2557 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2558 SV *coro_hv = SvRV (coro_current);
2559 struct coro *coro = SvSTATE_hv (coro_hv);
2560
2561 /* put our coroutine id on the state arg */
2562 av_push (state, SvREFCNT_inc_NN (coro_hv));
2563
2564 /* first see whether we have a non-zero priority and set it as AIO prio */
2565 if (coro->prio)
2566 {
2567 dSP;
2568
2569 static SV *prio_cv;
2570 static SV *prio_sv;
2571
2572 if (expect_false (!prio_cv))
2573 {
2574 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2575 prio_sv = newSViv (0);
2576 }
2577
2578 PUSHMARK (SP);
2579 sv_setiv (prio_sv, coro->prio);
2580 XPUSHs (prio_sv);
2581
2582 PUTBACK;
2583 call_sv (prio_cv, G_VOID | G_DISCARD);
2584 }
2585
2586 /* now call the original request */
2587 {
2588 dSP;
2589 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2590 int i;
2591
2592 PUSHMARK (SP);
2593
2594 /* first push all args to the stack */
2595 EXTEND (SP, items + 1);
2596
2597 for (i = 0; i < items; ++i)
2598 PUSHs (arg [i]);
2599
2600 /* now push the callback closure */
2601 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2602
2603 /* now call the AIO function - we assume our request is uncancelable */
2604 PUTBACK;
2605 call_sv ((SV *)req, G_VOID | G_DISCARD);
2606 }
2607
2608 /* now that the requets is going, we loop toll we have a result */
2609 frame->data = (void *)state;
2610 frame->prepare = prepare_schedule;
2611 frame->check = slf_check_aio_req;
2612}
2613
2614static void
2615coro_aio_req_xs (pTHX_ CV *cv)
2616{
2617 dXSARGS;
2618
2619 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2620
2621 XSRETURN_EMPTY;
2622}
2623
2624/*****************************************************************************/
2625
748MODULE = Coro::State PACKAGE = Coro::State 2626MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749 2627
750PROTOTYPES: ENABLE 2628PROTOTYPES: DISABLE
751 2629
752BOOT: 2630BOOT:
753{ /* {} necessary for stoopid perl-5.6.x */ 2631{
754 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2632#ifdef USE_ITHREADS
755 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2633# if CORO_PTHREAD
2634 coro_thx = PERL_GET_CONTEXT;
2635# endif
2636#endif
2637 BOOT_PAGESIZE;
2638
2639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2641
2642 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2643 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2644 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2645
2646 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2647 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2648 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2649
756 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2650 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757 2651
758 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2652 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2653 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2654 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2655 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763 if (!padlist_cache)
764 padlist_cache = newHV ();
765 2656
766 main_mainstack = PL_mainstack; 2657 main_mainstack = PL_mainstack;
767} 2658 main_top_env = PL_top_env;
768 2659
769Coro::State 2660 while (main_top_env->je_prev)
770_newprocess(args) 2661 main_top_env = main_top_env->je_prev;
771 SV * args 2662
772 PROTOTYPE: $ 2663 {
2664 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2665
2666 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2667 hv_store_ent (PL_custom_op_names, slf,
2668 newSVpv ("coro_slf", 0), 0);
2669
2670 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2671 hv_store_ent (PL_custom_op_descs, slf,
2672 newSVpv ("coro schedule like function", 0), 0);
2673 }
2674
2675 coroapi.ver = CORO_API_VERSION;
2676 coroapi.rev = CORO_API_REVISION;
2677
2678 coroapi.transfer = api_transfer;
2679
2680 coroapi.sv_state = SvSTATE_;
2681 coroapi.execute_slf = api_execute_slf;
2682 coroapi.prepare_nop = prepare_nop;
2683 coroapi.prepare_schedule = prepare_schedule;
2684 coroapi.prepare_cede = prepare_cede;
2685 coroapi.prepare_cede_notself = prepare_cede_notself;
2686
2687 {
2688 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2689
2690 if (!svp) croak ("Time::HiRes is required");
2691 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2692
2693 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2694 }
2695
2696 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2697}
2698
2699SV *
2700new (char *klass, ...)
2701 ALIAS:
2702 Coro::new = 1
773 CODE: 2703 CODE:
774 Coro__State coro; 2704{
2705 struct coro *coro;
2706 MAGIC *mg;
2707 HV *hv;
2708 CV *cb;
2709 int i;
775 2710
776 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2711 if (items > 1)
777 croak ("Coro::State::_newprocess expects an arrayref");
778 2712 {
2713 cb = coro_sv_2cv (aTHX_ ST (1));
2714
2715 if (!ix)
2716 {
2717 if (CvISXSUB (cb))
2718 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2719
2720 if (!CvROOT (cb))
2721 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2722 }
2723 }
2724
779 New (0, coro, 1, struct coro); 2725 Newz (0, coro, 1, struct coro);
2726 coro->args = newAV ();
2727 coro->flags = CF_NEW;
780 2728
781 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2729 if (coro_first) coro_first->prev = coro;
782 coro->mainstack = 0; /* actual work is done inside transfer */ 2730 coro->next = coro_first;
783 coro->stack = 0; 2731 coro_first = coro;
784 2732
785 RETVAL = coro; 2733 coro->hv = hv = newHV ();
2734 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2735 mg->mg_flags |= MGf_DUP;
2736 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2737
2738 if (items > 1)
2739 {
2740 av_extend (coro->args, items - 1 + ix - 1);
2741
2742 if (ix)
2743 {
2744 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2745 cb = cv_coro_run;
2746 }
2747
2748 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2749
2750 for (i = 2; i < items; i++)
2751 av_push (coro->args, newSVsv (ST (i)));
2752 }
2753}
786 OUTPUT: 2754 OUTPUT:
787 RETVAL 2755 RETVAL
788 2756
789void 2757void
790transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2758transfer (...)
791 Coro::State_or_hashref prev
792 Coro::State_or_hashref next
793 int flags
794 PROTOTYPE: @ 2759 PROTOTYPE: $$
795 CODE: 2760 CODE:
796 transfer (aTHX_ prev, next, flags); 2761 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2762
2763bool
2764_destroy (SV *coro_sv)
2765 CODE:
2766 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2767 OUTPUT:
2768 RETVAL
797 2769
798void 2770void
799DESTROY(coro) 2771_exit (int code)
800 Coro::State coro 2772 PROTOTYPE: $
801 CODE: 2773 CODE:
2774 _exit (code);
802 2775
803 if (coro->mainstack && coro->mainstack != main_mainstack) 2776int
2777cctx_stacksize (int new_stacksize = 0)
2778 PROTOTYPE: ;$
2779 CODE:
2780 RETVAL = cctx_stacksize;
2781 if (new_stacksize)
2782 {
2783 cctx_stacksize = new_stacksize;
2784 ++cctx_gen;
2785 }
2786 OUTPUT:
2787 RETVAL
2788
2789int
2790cctx_max_idle (int max_idle = 0)
2791 PROTOTYPE: ;$
2792 CODE:
2793 RETVAL = cctx_max_idle;
2794 if (max_idle > 1)
2795 cctx_max_idle = max_idle;
2796 OUTPUT:
2797 RETVAL
2798
2799int
2800cctx_count ()
2801 PROTOTYPE:
2802 CODE:
2803 RETVAL = cctx_count;
2804 OUTPUT:
2805 RETVAL
2806
2807int
2808cctx_idle ()
2809 PROTOTYPE:
2810 CODE:
2811 RETVAL = cctx_idle;
2812 OUTPUT:
2813 RETVAL
2814
2815void
2816list ()
2817 PROTOTYPE:
2818 PPCODE:
2819{
2820 struct coro *coro;
2821 for (coro = coro_first; coro; coro = coro->next)
2822 if (coro->hv)
2823 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2824}
2825
2826void
2827call (Coro::State coro, SV *coderef)
2828 ALIAS:
2829 eval = 1
2830 CODE:
2831{
2832 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
804 { 2833 {
805 struct coro temp; 2834 struct coro temp;
806 2835
807 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2836 if (!(coro->flags & CF_RUNNING))
808 LOAD(aTHX_ coro); 2837 {
2838 PUTBACK;
2839 save_perl (aTHX_ &temp);
2840 load_perl (aTHX_ coro);
2841 }
809 2842
810 destroy_stacks (aTHX); 2843 {
2844 dSP;
2845 ENTER;
2846 SAVETMPS;
2847 PUTBACK;
2848 PUSHSTACK;
2849 PUSHMARK (SP);
811 2850
812 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2851 if (ix)
2852 eval_sv (coderef, 0);
2853 else
2854 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813 2855
814 coro->mainstack = 0; 2856 POPSTACK;
2857 SPAGAIN;
2858 FREETMPS;
2859 LEAVE;
2860 PUTBACK;
2861 }
2862
2863 if (!(coro->flags & CF_RUNNING))
2864 {
2865 save_perl (aTHX_ coro);
2866 load_perl (aTHX_ &temp);
2867 SPAGAIN;
2868 }
815 } 2869 }
2870}
816 2871
817 deallocate_stack (coro); 2872SV *
818 2873is_ready (Coro::State coro)
819 Safefree (coro); 2874 PROTOTYPE: $
2875 ALIAS:
2876 is_ready = CF_READY
2877 is_running = CF_RUNNING
2878 is_new = CF_NEW
2879 is_destroyed = CF_DESTROYED
2880 CODE:
2881 RETVAL = boolSV (coro->flags & ix);
2882 OUTPUT:
2883 RETVAL
820 2884
821void 2885void
822flush() 2886throw (Coro::State self, SV *throw = &PL_sv_undef)
2887 PROTOTYPE: $;$
2888 CODE:
2889{
2890 struct coro *current = SvSTATE_current;
2891 SV **throwp = self == current ? &CORO_THROW : &self->except;
2892 SvREFCNT_dec (*throwp);
2893 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2894}
2895
2896void
2897api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2898 PROTOTYPE: $;$
2899 C_ARGS: aTHX_ coro, flags
2900
2901SV *
2902has_cctx (Coro::State coro)
2903 PROTOTYPE: $
823 CODE: 2904 CODE:
824#ifdef MAY_FLUSH 2905 RETVAL = boolSV (!!coro->cctx);
825 flush_padlist_cache (); 2906 OUTPUT:
826#endif 2907 RETVAL
827 2908
828MODULE = Coro::State PACKAGE = Coro::Cont 2909int
2910is_traced (Coro::State coro)
2911 PROTOTYPE: $
2912 CODE:
2913 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2914 OUTPUT:
2915 RETVAL
829 2916
830# this is slightly dirty 2917UV
2918rss (Coro::State coro)
2919 PROTOTYPE: $
2920 ALIAS:
2921 usecount = 1
2922 CODE:
2923 switch (ix)
2924 {
2925 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2926 case 1: RETVAL = coro->usecount; break;
2927 }
2928 OUTPUT:
2929 RETVAL
831 2930
832void 2931void
833yield(...) 2932force_cctx ()
2933 PROTOTYPE:
2934 CODE:
2935 SvSTATE_current->cctx->idle_sp = 0;
2936
2937void
2938swap_defsv (Coro::State self)
834 PROTOTYPE: @ 2939 PROTOTYPE: $
2940 ALIAS:
2941 swap_defav = 1
835 CODE: 2942 CODE:
836 static SV *returnstk; 2943 if (!self->slot)
837 SV *sv; 2944 croak ("cannot swap state with coroutine that has no saved state,");
838 AV *defav = GvAV (PL_defgv); 2945 else
839 struct coro *prev, *next; 2946 {
2947 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2948 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
840 2949
841 if (!returnstk) 2950 SV *tmp = *src; *src = *dst; *dst = tmp;
842 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2951 }
843 2952
844 /* set up @_ -- ugly */ 2953
845 av_clear (defav); 2954MODULE = Coro::State PACKAGE = Coro
2955
2956BOOT:
2957{
2958 int i;
2959
2960 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2961 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2962 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2963 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2964 cv_coro_terminate = get_cv ( "Coro::terminate", GV_ADD);
2965 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2966 SvREADONLY_on (coro_current);
2967
2968 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
2969 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
2970 cv_pool_handler = get_cv ("Coro::_pool_handler", 0); SvREADONLY_on (cv_pool_handler);
2971 cv_coro_new = get_cv ("Coro::new", 0); SvREADONLY_on (cv_coro_new);
2972
2973 coro_stash = gv_stashpv ("Coro", TRUE);
2974
2975 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2976 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2977 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2978 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2979 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2980 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2981
2982 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2983 coro_ready[i] = newAV ();
2984
2985 {
2986 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2987
2988 coroapi.schedule = api_schedule;
2989 coroapi.cede = api_cede;
2990 coroapi.cede_notself = api_cede_notself;
2991 coroapi.ready = api_ready;
2992 coroapi.is_ready = api_is_ready;
2993 coroapi.nready = coro_nready;
2994 coroapi.current = coro_current;
2995
2996 /*GCoroAPI = &coroapi;*/
2997 sv_setiv (sv, (IV)&coroapi);
2998 SvREADONLY_on (sv);
2999 }
3000}
3001
3002void
3003schedule (...)
3004 CODE:
3005 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3006
3007void
3008cede (...)
3009 CODE:
3010 CORO_EXECUTE_SLF_XS (slf_init_cede);
3011
3012void
3013cede_notself (...)
3014 CODE:
3015 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3016
3017void
3018_set_current (SV *current)
3019 PROTOTYPE: $
3020 CODE:
3021 SvREFCNT_dec (SvRV (coro_current));
3022 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3023
3024void
3025_set_readyhook (SV *hook)
3026 PROTOTYPE: $
3027 CODE:
3028 SvREFCNT_dec (coro_readyhook);
3029 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3030
3031int
3032prio (Coro::State coro, int newprio = 0)
3033 PROTOTYPE: $;$
3034 ALIAS:
3035 nice = 1
3036 CODE:
3037{
3038 RETVAL = coro->prio;
3039
3040 if (items > 1)
3041 {
3042 if (ix)
3043 newprio = coro->prio - newprio;
3044
3045 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3046 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3047
3048 coro->prio = newprio;
3049 }
3050}
3051 OUTPUT:
3052 RETVAL
3053
3054SV *
3055ready (SV *self)
3056 PROTOTYPE: $
3057 CODE:
3058 RETVAL = boolSV (api_ready (aTHX_ self));
3059 OUTPUT:
3060 RETVAL
3061
3062int
3063nready (...)
3064 PROTOTYPE:
3065 CODE:
3066 RETVAL = coro_nready;
3067 OUTPUT:
3068 RETVAL
3069
3070void
3071_pool_handler (...)
3072 CODE:
3073 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3074
3075void
3076async_pool (SV *cv, ...)
3077 PROTOTYPE: &@
3078 PPCODE:
3079{
3080 HV *hv = (HV *)av_pop (av_async_pool);
3081 AV *av = newAV ();
3082 SV *cb = ST (0);
3083 int i;
3084
846 av_fill (defav, items - 1); 3085 av_extend (av, items - 2);
847 while (items--) 3086 for (i = 1; i < items; ++i)
848 av_store (defav, items, SvREFCNT_inc (ST(items))); 3087 av_push (av, SvREFCNT_inc_NN (ST (i)));
849 3088
850 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 3089 if ((SV *)hv == &PL_sv_undef)
851 sv = av_pop ((AV *)SvRV (returnstk)); 3090 {
852 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 3091 PUSHMARK (SP);
853 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 3092 EXTEND (SP, 2);
3093 PUSHs (sv_Coro);
3094 PUSHs ((SV *)cv_pool_handler);
3095 PUTBACK;
3096 call_sv (cv_coro_new, G_SCALAR);
3097 SPAGAIN;
3098
3099 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3100 }
3101
3102 {
3103 struct coro *coro = SvSTATE_hv (hv);
3104
3105 assert (!coro->invoke_cb);
3106 assert (!coro->invoke_av);
3107 coro->invoke_cb = SvREFCNT_inc (cb);
3108 coro->invoke_av = av;
3109 }
3110
3111 api_ready ((SV *)hv);
3112
3113 if (GIMME_V != G_VOID)
3114 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3115 else
854 SvREFCNT_dec (sv); 3116 SvREFCNT_dec (hv);
3117}
855 3118
856 transfer(aTHX_ prev, next, 0); 3119SV *
3120rouse_cb ()
3121 PROTOTYPE:
3122 CODE:
3123 RETVAL = coro_new_rouse_cb (aTHX);
3124 OUTPUT:
3125 RETVAL
857 3126
3127void
3128rouse_wait (...)
3129 PROTOTYPE: ;$
3130 PPCODE:
3131 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3132
3133
3134MODULE = Coro::State PACKAGE = PerlIO::cede
3135
3136BOOT:
3137 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3138
3139
3140MODULE = Coro::State PACKAGE = Coro::Semaphore
3141
3142SV *
3143new (SV *klass, SV *count = 0)
3144 CODE:
3145 RETVAL = sv_bless (
3146 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3147 GvSTASH (CvGV (cv))
3148 );
3149 OUTPUT:
3150 RETVAL
3151
3152# helper for Coro::Channel
3153SV *
3154_alloc (int count)
3155 CODE:
3156 RETVAL = coro_waitarray_new (aTHX_ count);
3157 OUTPUT:
3158 RETVAL
3159
3160SV *
3161count (SV *self)
3162 CODE:
3163 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3164 OUTPUT:
3165 RETVAL
3166
3167void
3168up (SV *self, int adjust = 1)
3169 ALIAS:
3170 adjust = 1
3171 CODE:
3172 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3173
3174void
3175down (...)
3176 CODE:
3177 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3178
3179void
3180wait (...)
3181 CODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3183
3184void
3185try (SV *self)
3186 PPCODE:
3187{
3188 AV *av = (AV *)SvRV (self);
3189 SV *count_sv = AvARRAY (av)[0];
3190 IV count = SvIVX (count_sv);
3191
3192 if (count > 0)
3193 {
3194 --count;
3195 SvIVX (count_sv) = count;
3196 XSRETURN_YES;
3197 }
3198 else
3199 XSRETURN_NO;
3200}
3201
3202void
3203waiters (SV *self)
3204 PPCODE:
3205{
3206 AV *av = (AV *)SvRV (self);
3207 int wcount = AvFILLp (av) + 1 - 1;
3208
3209 if (GIMME_V == G_SCALAR)
3210 XPUSHs (sv_2mortal (newSViv (wcount)));
3211 else
3212 {
3213 int i;
3214 EXTEND (SP, wcount);
3215 for (i = 1; i <= wcount; ++i)
3216 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3217 }
3218}
3219
3220MODULE = Coro::State PACKAGE = Coro::Signal
3221
3222SV *
3223new (SV *klass)
3224 CODE:
3225 RETVAL = sv_bless (
3226 coro_waitarray_new (aTHX_ 0),
3227 GvSTASH (CvGV (cv))
3228 );
3229 OUTPUT:
3230 RETVAL
3231
3232void
3233wait (...)
3234 CODE:
3235 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3236
3237void
3238broadcast (SV *self)
3239 CODE:
3240{
3241 AV *av = (AV *)SvRV (self);
3242 coro_signal_wake (aTHX_ av, AvFILLp (av));
3243}
3244
3245void
3246send (SV *self)
3247 CODE:
3248{
3249 AV *av = (AV *)SvRV (self);
3250
3251 if (AvFILLp (av))
3252 coro_signal_wake (aTHX_ av, 1);
3253 else
3254 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3255}
3256
3257IV
3258awaited (SV *self)
3259 CODE:
3260 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3261 OUTPUT:
3262 RETVAL
3263
3264
3265MODULE = Coro::State PACKAGE = Coro::AnyEvent
3266
3267BOOT:
3268 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3269
3270void
3271_schedule (...)
3272 CODE:
3273{
3274 static int incede;
3275
3276 api_cede_notself (aTHX);
3277
3278 ++incede;
3279 while (coro_nready >= incede && api_cede (aTHX))
3280 ;
3281
3282 sv_setsv (sv_activity, &PL_sv_undef);
3283 if (coro_nready >= incede)
3284 {
3285 PUSHMARK (SP);
3286 PUTBACK;
3287 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3288 }
3289
3290 --incede;
3291}
3292
3293
3294MODULE = Coro::State PACKAGE = Coro::AIO
3295
3296void
3297_register (char *target, char *proto, SV *req)
3298 CODE:
3299{
3300 CV *req_cv = coro_sv_2cv (aTHX_ req);
3301 /* newXSproto doesn't return the CV on 5.8 */
3302 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3303 sv_setpv ((SV *)slf_cv, proto);
3304 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3305}
3306

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