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Comparing Coro/Coro/State.xs (file contents):
Revision 1.72 by root, Wed Feb 1 23:59:41 2006 UTC vs.
Revision 1.369 by root, Thu Aug 13 02:48:32 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "schmorp.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
12# ifndef PL_ppaddr 14#include <errno.h>
13# define PL_ppaddr ppaddr 15#include <assert.h>
14# endif 16
15# ifndef call_sv 17#ifdef WIN32
16# define call_sv perl_call_sv 18# undef setjmp
17# endif 19# undef longjmp
18# ifndef get_sv 20# undef _exit
19# define get_sv perl_get_sv 21# define setjmp _setjmp /* deep magic */
20# endif 22#else
21# ifndef get_cv 23# include <inttypes.h> /* most portable stdint.h */
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif 24#endif
31
32#include <errno.h>
33#include <signal.h>
34 25
35#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
36# include <unistd.h> 27# include <unistd.h>
37# include <sys/mman.h> 28# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
40# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
41# else 32# else
42# undef HAVE_MMAP 33# undef HAVE_MMAP
43# endif 34# endif
44# 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
45#endif 47#endif
46 48
47#define SUB_INIT "Coro::State::initialize" 49#if CORO_USE_VALGRIND
48#define UCORO_STATE "_coro_state" 50# include <valgrind/valgrind.h>
51#endif
49 52
50/* The next macro should declare a variable stacklevel that contains and approximation 53/* the maximum number of idle cctx that will be pooled */
51 * to the current C stack pointer. Its property is that it changes with each call 54static int cctx_max_idle = 4;
52 * and should be unique. */ 55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
53#define dSTACKLEVEL void *stacklevel = &stacklevel 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
54 78
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
56 80
57#define labs(l) ((l) >= 0 ? (l) : -(l)) 81#if __GNUC__ >= 3
82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
85#else
86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif
90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
94#define NOINLINE attribute ((noinline))
58 95
59#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
60 98
61#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 100# if CORO_PTHREAD
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
65#else
66# define LOCK (void)0
67# define UNLOCK (void)0
68#endif 103#endif
69 104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
70static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
72static HV *coro_state_stash; 127static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 129
77/* this is actually not only the c stack but also c registers etc... */ 130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147
148/* Coro::AnyEvent */
149static SV *sv_activity;
150
151/* enable processtime/realtime profiling */
152static char enable_times;
153typedef U32 coro_ts[2];
154static coro_ts time_real, time_cpu;
155static char times_valid;
156
157static struct coro_cctx *cctx_first;
158static int cctx_count, cctx_idle;
159
160enum {
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
168
169/* this is a structure representing a c-level coroutine */
78typedef struct { 170typedef struct coro_cctx
79 int refcnt; /* pointer reference counter */ 171{
80 int usecnt; /* shared by how many coroutines */ 172 struct coro_cctx *next;
81 int gencnt; /* generation counter */
82 173
174 /* the stack */
175 void *sptr;
176 size_t ssize;
177
178 /* cpu state */
179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
181 JMPENV *top_env;
83 coro_context cctx; 182 coro_context cctx;
84 183
85 void *sptr; 184 U32 gen;
86 long ssize; /* positive == mmap, otherwise malloc */ 185#if CORO_USE_VALGRIND
87} coro_stack; 186 int valgrind_id;
187#endif
188 unsigned char flags;
189} coro_cctx;
88 190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
195enum {
196 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
201};
202
203/* the structure where most of the perl state is stored, overlaid on the cxstack */
204typedef struct
205{
206 SV *defsv;
207 AV *defav;
208 SV *errsv;
209 SV *irsgv;
210 HV *hinthv;
211#define VAR(name,type) type name;
212# include "state.h"
213#undef VAR
214} perl_slots;
215
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217
218/* this is a structure representing a perl-level coroutine */
89struct coro { 219struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 220 /* the C coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 221 coro_cctx *cctx;
92 222
93 /* the optional C context */ 223 /* ready queue */
94 coro_stack *stack; 224 struct coro *next_ready;
95 void *cursp;
96 int gencnt;
97 225
98 /* optionally saved, might be zero */ 226 /* state data */
99 AV *defav; 227 struct CoroSLF slf_frame; /* saved slf frame */
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 228 AV *mainstack;
111 SV **stack_sp; 229 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 230
231 CV *startcv; /* the CV to execute */
138 /* data associated with this coroutine (initial args) */ 232 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 233 int refcnt; /* coroutines are refcounted, yes */
234 int flags; /* CF_ flags */
235 HV *hv; /* the perl hash associated with this coro, if any */
236 void (*on_destroy)(pTHX_ struct coro *coro);
237
238 /* statistics */
239 int usecount; /* number of transfers to this coro */
240
241 /* coro process data */
242 int prio;
243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
245
246 /* async_pool */
247 SV *saved_deffh;
248 SV *invoke_cb;
249 AV *invoke_av;
250
251 /* on_enter/on_leave */
252 AV *on_enter;
253 AV *on_leave;
254
255 /* times */
256 coro_ts t_cpu, t_real;
257
258 /* linked list */
259 struct coro *next, *prev;
140}; 260};
141 261
142typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
144 264
145/* mostly copied from op.c:cv_clone2 */ 265/* the following variables are effectively part of the perl context */
146STATIC AV * 266/* and get copied between struct coro and these variables */
147clone_padlist (pTHX_ AV *protopadlist) 267/* the mainr easonw e don't support windows process emulation */
268static struct CoroSLF slf_frame; /* the current slf frame */
269
270/** Coro ********************************************************************/
271
272#define CORO_PRIO_MAX 3
273#define CORO_PRIO_HIGH 1
274#define CORO_PRIO_NORMAL 0
275#define CORO_PRIO_LOW -1
276#define CORO_PRIO_IDLE -3
277#define CORO_PRIO_MIN -4
278
279/* for Coro.pm */
280static SV *coro_current;
281static SV *coro_readyhook;
282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
283static CV *cv_coro_run, *cv_coro_terminate;
284static struct coro *coro_first;
285#define coro_nready coroapi.nready
286
287/** Coro::Select ************************************************************/
288
289static OP *(*coro_old_pp_sselect) (pTHX);
290static SV *coro_select_select;
291
292/* horrible hack, but if it works... */
293static OP *
294coro_pp_sselect (aTHX)
148{ 295{
149 AV *av; 296 dSP;
150 I32 ix; 297 PUSHMARK (SP - 4); /* fake argument list */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 298 XPUSHs (coro_select_select);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 299 PUTBACK;
153 SV **pname = AvARRAY (protopad_name); 300
154 SV **ppad = AvARRAY (protopad); 301 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
155 I32 fname = AvFILLp (protopad_name); 302 PL_op->op_flags |= OPf_STACKED;
156 I32 fpad = AvFILLp (protopad); 303 PL_op->op_private = 0;
304 return PL_ppaddr [OP_ENTERSUB](aTHX);
305}
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339INLINE void
340coro_times_update ()
341{
342#ifdef coro_clock_gettime
343 struct timespec ts;
344
345 ts.tv_sec = ts.tv_nsec = 0;
346 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
347 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
348
349 ts.tv_sec = ts.tv_nsec = 0;
350 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
351 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
352#else
353 dTHX;
354 UV tv[2];
355
356 u2time (aTHX_ tv);
357 time_real [0] = tv [0];
358 time_real [1] = tv [1] * 1000;
359#endif
360}
361
362INLINE void
363coro_times_add (struct coro *c)
364{
365 c->t_real [1] += time_real [1];
366 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
367 c->t_real [0] += time_real [0];
368
369 c->t_cpu [1] += time_cpu [1];
370 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
371 c->t_cpu [0] += time_cpu [0];
372}
373
374INLINE void
375coro_times_sub (struct coro *c)
376{
377 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
378 c->t_real [1] -= time_real [1];
379 c->t_real [0] -= time_real [0];
380
381 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
382 c->t_cpu [1] -= time_cpu [1];
383 c->t_cpu [0] -= time_cpu [0];
384}
385
386/*****************************************************************************/
387/* magic glue */
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392#define CORO_MAGIC_NN(sv, type) \
393 (expect_true (SvMAGIC (sv)->mg_type == type) \
394 ? SvMAGIC (sv) \
395 : mg_find (sv, type))
396
397#define CORO_MAGIC(sv, type) \
398 (expect_true (SvMAGIC (sv)) \
399 ? CORO_MAGIC_NN (sv, type) \
400 : 0)
401
402#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
403#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
404
405INLINE struct coro *
406SvSTATE_ (pTHX_ SV *coro)
407{
408 HV *stash;
409 MAGIC *mg;
410
411 if (SvROK (coro))
412 coro = SvRV (coro);
413
414 if (expect_false (SvTYPE (coro) != SVt_PVHV))
415 croak ("Coro::State object required");
416
417 stash = SvSTASH (coro);
418 if (expect_false (stash != coro_stash && stash != coro_state_stash))
419 {
420 /* very slow, but rare, check */
421 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
422 croak ("Coro::State object required");
423 }
424
425 mg = CORO_MAGIC_state (coro);
426 return (struct coro *)mg->mg_ptr;
427}
428
429#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
430
431/* faster than SvSTATE, but expects a coroutine hv */
432#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
433#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
434
435/*****************************************************************************/
436/* padlist management and caching */
437
438static AV *
439coro_derive_padlist (pTHX_ CV *cv)
440{
441 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 442 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 443
168 newpadlist = newAV (); 444 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 445 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 446#if PERL_VERSION_ATLEAST (5,10,0)
447 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
448#else
449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
450#endif
451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
452 --AvFILLp (padlist);
453
454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
171 av_store (newpadlist, 1, (SV *) newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
172 456
173 av = newAV (); /* will be @_ */ 457 return newpadlist;
174 av_extend (av, 0); 458}
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177 459
178 for (ix = fpad; ix > 0; ix--) 460static void
461free_padlist (pTHX_ AV *padlist)
462{
463 /* may be during global destruction */
464 if (!IN_DESTRUCT)
179 { 465 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 466 I32 i = AvFILLp (padlist);
181 467
182 if (namesv && namesv != &PL_sv_undef) 468 while (i > 0) /* special-case index 0 */
183 { 469 {
184 char *name = SvPVX (namesv); /* XXX */ 470 /* we try to be extra-careful here */
471 AV *av = (AV *)AvARRAY (padlist)[i--];
472 I32 j = AvFILLp (av);
185 473
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 474 while (j >= 0)
187 { /* lexical from outside? */ 475 SvREFCNT_dec (AvARRAY (av)[j--]);
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201 476
202#ifdef SvPADBUSY 477 AvFILLp (av) = -1;
203 if (!SvPADBUSY (sv)) 478 SvREFCNT_dec (av);
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 } 479 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221 480
222#if 0 /* return -ENOTUNDERSTOOD */ 481 SvREFCNT_dec (AvARRAY (padlist)[0]);
223 /* Now that vars are all in place, clone nested closures. */
224 482
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241
242 return newpadlist;
243}
244
245STATIC void
246free_padlist (pTHX_ AV *padlist)
247{
248 /* may be during global destruction */
249 if (SvREFCNT (padlist))
250 {
251 I32 i = AvFILLp (padlist); 483 AvFILLp (padlist) = -1;
252 while (i >= 0)
253 {
254 SV **svp = av_fetch (padlist, i--, FALSE);
255 if (svp)
256 {
257 SV *sv;
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
259 SvREFCNT_dec (sv);
260
261 SvREFCNT_dec (*svp);
262 }
263 }
264
265 SvREFCNT_dec ((SV*)padlist); 484 SvREFCNT_dec ((SV*)padlist);
266 } 485 }
267} 486}
268 487
269STATIC int 488static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 490{
272 AV *padlist; 491 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 492 AV *av = (AV *)mg->mg_obj;
493
494 /* perl manages to free our internal AV and _then_ call us */
495 if (IN_DESTRUCT)
496 return 0;
274 497
275 /* casting is fun. */ 498 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 500 free_padlist (aTHX_ padlist);
278 501
279 SvREFCNT_dec (av); 502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280}
281 503
282#define PERL_MAGIC_coro PERL_MAGIC_ext 504 return 0;
505}
283 506
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 507static MGVTBL coro_cv_vtbl = {
508 0, 0, 0, 0,
509 coro_cv_free
510};
285 511
286/* the next two functions merely cache the padlists */ 512/* the next two functions merely cache the padlists */
287STATIC void 513static void
288get_padlist (pTHX_ CV *cv) 514get_padlist (pTHX_ CV *cv)
289{ 515{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 516 MAGIC *mg = CORO_MAGIC_cv (cv);
517 AV *av;
291 518
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 519 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 520 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 521 else
522 {
523#if CORO_PREFER_PERL_FUNCTIONS
524 /* this is probably cleaner? but also slower! */
525 /* in practise, it seems to be less stable */
526 CV *cp = Perl_cv_clone (aTHX_ cv);
527 CvPADLIST (cv) = CvPADLIST (cp);
528 CvPADLIST (cp) = 0;
529 SvREFCNT_dec (cp);
530#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
532#endif
533 }
296} 534}
297 535
298STATIC void 536static void
299put_padlist (pTHX_ CV *cv) 537put_padlist (pTHX_ CV *cv)
300{ 538{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 539 MAGIC *mg = CORO_MAGIC_cv (cv);
540 AV *av;
302 541
303 if (!mg) 542 if (expect_false (!mg))
304 { 543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV ();
309 }
310 544
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 545 av = (AV *)mg->mg_obj;
312}
313 546
314#define SB do { 547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
315#define SE } while (0) 548 av_extend (av, AvFILLp (av) + 1);
316 549
317#define LOAD(state) load_state(aTHX_ (state)); 550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 551}
319 552
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 553/** load & save, init *******************************************************/
321 554
322static void 555static void
556on_enterleave_call (pTHX_ SV *cb);
557
558static void
323load_state(pTHX_ Coro__State c) 559load_perl (pTHX_ Coro__State c)
324{ 560{
325 PL_dowarn = c->dowarn; 561 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 562 c->slot = 0;
327 563
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 564 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 565
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 566 GvSV (PL_defgv) = slot->defsv;
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 567 GvAV (PL_defgv) = slot->defav;
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 568 GvSV (PL_errgv) = slot->errsv;
569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
571
572 #define VAR(name,type) PL_ ## name = slot->name;
573 # include "state.h"
574 #undef VAR
363 575
364 { 576 {
365 dSP; 577 dSP;
578
366 CV *cv; 579 CV *cv;
367 580
368 /* now do the ugly restore mess */ 581 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 582 while (expect_true (cv = (CV *)POPs))
370 { 583 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 584 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 585 CvDEPTH (cv) = PTR2IV (POPs);
377 } 586 CvPADLIST (cv) = (AV *)POPs;
378
379 ++CvDEPTH(cv);
380 } 587 }
381 588
382 PUTBACK; 589 PUTBACK;
383 } 590 }
384}
385 591
592 slf_frame = c->slf_frame;
593 CORO_THROW = c->except;
594
595 if (expect_false (enable_times))
596 {
597 if (expect_false (!times_valid))
598 coro_times_update ();
599
600 coro_times_sub (c);
601 }
602
603 if (expect_false (c->on_enter))
604 {
605 int i;
606
607 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
608 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
609 }
610}
611
386static void 612static void
387save_state(pTHX_ Coro__State c, int flags) 613save_perl (pTHX_ Coro__State c)
388{ 614{
615 if (expect_false (c->on_leave))
616 {
617 int i;
618
619 for (i = AvFILLp (c->on_leave); i >= 0; --i)
620 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
621 }
622
623 times_valid = 0;
624
625 if (expect_false (enable_times))
626 {
627 coro_times_update (); times_valid = 1;
628 coro_times_add (c);
629 }
630
631 c->except = CORO_THROW;
632 c->slf_frame = slf_frame;
633
389 { 634 {
390 dSP; 635 dSP;
391 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 640 /*
396 * the worst thing you can imagine happens first - we have to save 641 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 642 * (and reinitialize) all cv's in the whole callchain :(
398 */ 643 */
399 644
400 PUSHs (Nullsv); 645 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 646 /* this loop was inspired by pp_caller */
402 for (;;) 647 for (;;)
403 { 648 {
404 while (cxix >= 0) 649 while (expect_true (cxix >= 0))
405 { 650 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
407 652
408 if (CxTYPE(cx) == CXt_SUB) 653 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
409 { 654 {
410 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
656
411 if (CvDEPTH(cv)) 657 if (expect_true (CvDEPTH (cv)))
412 { 658 {
413 EXTEND (SP, CvDEPTH(cv)*2); 659 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 660 PUSHs ((SV *)CvPADLIST (cv));
661 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 662 PUSHs ((SV *)cv);
424 663
664 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 665 get_padlist (aTHX_ cv);
426 } 666 }
427 } 667 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 668 }
437 669
438 if (top_si->si_type == PERLSI_MAIN) 670 if (expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 671 break;
440 672
441 top_si = top_si->si_prev; 673 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 674 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 675 cxix = top_si->si_cxix;
444 } 676 }
445 677
446 PUTBACK; 678 PUTBACK;
447 } 679 }
448 680
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 681 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 682 /* we manually unroll here, as usually 2 slots is enough */
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 683 if (SLOT_COUNT >= 1) CXINC;
684 if (SLOT_COUNT >= 2) CXINC;
685 if (SLOT_COUNT >= 3) CXINC;
686 {
687 unsigned int i;
688 for (i = 3; i < SLOT_COUNT; ++i)
689 CXINC;
690 }
691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 692
453 c->dowarn = PL_dowarn;
454 c->in_eval = PL_in_eval;
455
456 c->curstackinfo = PL_curstackinfo;
457 c->curstack = PL_curstack;
458 c->mainstack = PL_mainstack; 693 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 694
460 c->op = PL_op; 695 {
461 c->curpad = PL_curpad; 696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 697
463 c->compcv = PL_compcv; 698 slot->defav = GvAV (PL_defgv);
464 c->stack_base = PL_stack_base; 699 slot->defsv = DEFSV;
465 c->stack_max = PL_stack_max; 700 slot->errsv = ERRSV;
466 c->tmps_stack = PL_tmps_stack; 701 slot->irsgv = GvSV (irsgv);
467 c->tmps_floor = PL_tmps_floor; 702 slot->hinthv = GvHV (PL_hintgv);
468 c->tmps_ix = PL_tmps_ix; 703
469 c->tmps_max = PL_tmps_max; 704 #define VAR(name,type) slot->name = PL_ ## name;
470 c->markstack = PL_markstack; 705 # include "state.h"
471 c->markstack_ptr = PL_markstack_ptr; 706 #undef VAR
472 c->markstack_max = PL_markstack_max; 707 }
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif
484 c->curpm = PL_curpm;
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 708}
488 709
489/* 710/*
490 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 713 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 714 * not usually need a lot of stackspace.
494 */ 715 */
495STATIC void 716#if CORO_PREFER_PERL_FUNCTIONS
717# define coro_init_stacks(thx) init_stacks ()
718#else
719static void
496coro_init_stacks (pTHX) 720coro_init_stacks (pTHX)
497{ 721{
498 LOCK; 722 PL_curstackinfo = new_stackinfo(32, 8);
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 723 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 724 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 725 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 726
505 PL_stack_base = AvARRAY(PL_curstack); 727 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 728 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 729 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 730
509 New(50,PL_tmps_stack,96,SV*); 731 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 732 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 733 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 734 PL_tmps_max = 32;
513 735
514 New(54,PL_markstack,16,I32); 736 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 737 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 738 PL_markstack_max = PL_markstack + 16;
517 739
518#ifdef SET_MARK_OFFSET 740#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 741 SET_MARK_OFFSET;
520#endif 742#endif
521 743
522 New(54,PL_scopestack,16,I32); 744 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 745 PL_scopestack_ix = 0;
524 PL_scopestack_max = 16; 746 PL_scopestack_max = 8;
525 747
526 New(54,PL_savestack,96,ANY); 748 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 749 PL_savestack_ix = 0;
528 PL_savestack_max = 96; 750 PL_savestack_max = 24;
529 751
530#if PERL_VERSION < 9 752#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 753 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 754 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 755 PL_retstack_max = 4;
534#endif 756#endif
535
536 UNLOCK;
537} 757}
758#endif
538 759
539/* 760/*
540 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
541 */ 762 */
542STATIC void 763static void
543destroy_stacks(pTHX) 764coro_destruct_stacks (pTHX)
544{ 765{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
558 768
559 while (PL_curstackinfo) 769 while (PL_curstackinfo)
560 { 770 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 771 PERL_SI *p = PL_curstackinfo->si_prev;
562 772
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 773 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 774 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 775
575 Safefree (PL_curstackinfo->si_cxstack); 776 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 777 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 778 PL_curstackinfo = p;
578 } 779 }
579 780
580 Safefree (PL_tmps_stack); 781 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 782 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 783 Safefree (PL_scopestack);
583 Safefree (PL_savestack); 784 Safefree (PL_savestack);
584#if PERL_VERSION < 9 785#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 786 Safefree (PL_retstack);
586#endif 787#endif
587} 788}
588 789
589static void 790#define CORO_RSS \
590allocate_stack (Coro__State ctx, int alloc) 791 rss += sizeof (SYM (curstackinfo)); \
591{ 792 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
592 coro_stack *stack; 793 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
794 rss += SYM (tmps_max) * sizeof (SV *); \
795 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
796 rss += SYM (scopestack_max) * sizeof (I32); \
797 rss += SYM (savestack_max) * sizeof (ANY);
593 798
594 New (0, stack, 1, coro_stack); 799static size_t
800coro_rss (pTHX_ struct coro *coro)
801{
802 size_t rss = sizeof (*coro);
595 803
596 stack->refcnt = 1; 804 if (coro->mainstack)
597 stack->usecnt = 1; 805 {
598 stack->gencnt = ctx->gencnt = 0; 806 if (coro->flags & CF_RUNNING)
599 807 {
600 if (alloc) 808 #define SYM(sym) PL_ ## sym
809 CORO_RSS;
810 #undef SYM
811 }
812 else
813 {
814 #define SYM(sym) coro->slot->sym
815 CORO_RSS;
816 #undef SYM
817 }
601 { 818 }
602#if HAVE_MMAP 819
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */ 820 return rss;
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 821}
605 if (stack->sptr == (void *)-1) 822
823/** coroutine stack handling ************************************************/
824
825static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
826static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
828
829/* apparently < 5.8.8 */
830#ifndef MgPV_nolen_const
831#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
832 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
833 (const char*)(mg)->mg_ptr)
606#endif 834#endif
835
836/*
837 * This overrides the default magic get method of %SIG elements.
838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
839 * and instead of trying to save and restore the hash elements, we just provide
840 * readback here.
841 */
842static int
843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
844{
845 const char *s = MgPV_nolen_const (mg);
846
847 if (*s == '_')
848 {
849 SV **svp = 0;
850
851 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
852 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
853
854 if (svp)
607 { 855 {
608 /*FIXME*//*D*//* reasonable stack size! */ 856 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
609 stack->ssize = - (STACKSIZE * sizeof (long)); 857 return 0;
610 New (0, stack->sptr, STACKSIZE, long);
611 } 858 }
612 } 859 }
613 else
614 stack->sptr = 0;
615 860
616 ctx->stack = stack; 861 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
617} 862}
618 863
619static void 864static int
620deallocate_stack (Coro__State ctx) 865coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
621{ 866{
622 coro_stack *stack = ctx->stack; 867 const char *s = MgPV_nolen_const (mg);
623 868
624 ctx->stack = 0; 869 if (*s == '_')
625
626 if (stack)
627 { 870 {
628 if (!--stack->refcnt) 871 SV **svp = 0;
872
873 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
874 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
875
876 if (svp)
629 { 877 {
630#ifdef HAVE_MMAP 878 SV *old = *svp;
631 if (stack->ssize > 0 && stack->sptr) 879 *svp = 0;
632 munmap (stack->sptr, stack->ssize); 880 SvREFCNT_dec (old);
633 else 881 return 0;
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 } 882 }
639 else if (ctx->gencnt == stack->gencnt) 883 }
640 --stack->usecnt; 884
885 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
886}
887
888static int
889coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
890{
891 const char *s = MgPV_nolen_const (mg);
892
893 if (*s == '_')
641 } 894 {
642} 895 SV **svp = 0;
643 896
897 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
899
900 if (svp)
901 {
902 SV *old = *svp;
903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
904 SvREFCNT_dec (old);
905 return 0;
906 }
907 }
908
909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
910}
911
912static void
913prepare_nop (pTHX_ struct coro_transfer_args *ta)
914{
915 /* kind of mega-hacky, but works */
916 ta->next = ta->prev = (struct coro *)ta;
917}
918
644static void 919static int
645setup_coro (void *arg) 920slf_check_nop (pTHX_ struct CoroSLF *frame)
921{
922 return 0;
923}
924
925static int
926slf_check_repeat (pTHX_ struct CoroSLF *frame)
927{
928 return 1;
929}
930
931static UNOP coro_setup_op;
932
933static void NOINLINE /* noinline to keep it out of the transfer fast path */
934coro_setup (pTHX_ struct coro *coro)
646{ 935{
647 /* 936 /*
648 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
649 */ 938 */
939 coro_init_stacks (aTHX);
940
941 PL_runops = RUNOPS_DEFAULT;
942 PL_curcop = &PL_compiling;
943 PL_in_eval = EVAL_NULL;
944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
948 PL_curpm = 0;
949 PL_curpad = 0;
950 PL_localizing = 0;
951 PL_dirty = 0;
952 PL_restartop = 0;
953#if PERL_VERSION_ATLEAST (5,10,0)
954 PL_parser = 0;
955#endif
956 PL_hints = 0;
957
958 /* recreate the die/warn hooks */
959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
961
962 GvSV (PL_defgv) = newSV (0);
963 GvAV (PL_defgv) = coro->args; coro->args = 0;
964 GvSV (PL_errgv) = newSV (0);
965 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
966 GvHV (PL_hintgv) = 0;
967 PL_rs = newSVsv (GvSV (irsgv));
968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
969
970 {
971 dSP;
972 UNOP myop;
973
974 Zero (&myop, 1, UNOP);
975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
977 myop.op_flags = OPf_WANT_VOID;
978
979 PUSHMARK (SP);
980 PUSHs ((SV *)coro->startcv);
981 PUTBACK;
982 PL_op = (OP *)&myop;
983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
984 }
985
986 /* this newly created coroutine might be run on an existing cctx which most
987 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
988 */
989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
991
992 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
993 coro_setup_op.op_next = PL_op;
994 coro_setup_op.op_type = OP_ENTERSUB;
995 coro_setup_op.op_ppaddr = pp_slf;
996 /* no flags etc. required, as an init function won't be called */
997
998 PL_op = (OP *)&coro_setup_op;
999
1000 /* copy throw, in case it was set before coro_setup */
1001 CORO_THROW = coro->except;
1002
1003 if (expect_false (enable_times))
1004 {
1005 coro_times_update ();
1006 coro_times_sub (coro);
1007 }
1008}
1009
1010static void
1011coro_unwind_stacks (pTHX)
1012{
1013 if (!IN_DESTRUCT)
1014 {
1015 /* restore all saved variables and stuff */
1016 LEAVE_SCOPE (0);
1017 assert (PL_tmps_floor == -1);
1018
1019 /* free all temporaries */
1020 FREETMPS;
1021 assert (PL_tmps_ix == -1);
1022
1023 /* unwind all extra stacks */
1024 POPSTACK_TO (PL_mainstack);
1025
1026 /* unwind main stack */
1027 dounwind (-1);
1028 }
1029}
1030
1031static void
1032coro_destruct_perl (pTHX_ struct coro *coro)
1033{
1034 SV *svf [9];
1035
1036 {
1037 struct coro *current = SvSTATE_current;
1038
1039 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1040
1041 save_perl (aTHX_ current);
1042 load_perl (aTHX_ coro);
1043
1044 coro_unwind_stacks (aTHX);
1045 coro_destruct_stacks (aTHX);
1046
1047 // now save some sv's to be free'd later
1048 svf [0] = GvSV (PL_defgv);
1049 svf [1] = (SV *)GvAV (PL_defgv);
1050 svf [2] = GvSV (PL_errgv);
1051 svf [3] = (SV *)PL_defoutgv;
1052 svf [4] = PL_rs;
1053 svf [5] = GvSV (irsgv);
1054 svf [6] = (SV *)GvHV (PL_hintgv);
1055 svf [7] = PL_diehook;
1056 svf [8] = PL_warnhook;
1057 assert (9 == sizeof (svf) / sizeof (*svf));
1058
1059 load_perl (aTHX_ current);
1060 }
1061
1062 {
1063 unsigned int i;
1064
1065 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1066 SvREFCNT_dec (svf [i]);
1067
1068 SvREFCNT_dec (coro->saved_deffh);
1069 SvREFCNT_dec (coro->rouse_cb);
1070 SvREFCNT_dec (coro->invoke_cb);
1071 SvREFCNT_dec (coro->invoke_av);
1072 }
1073}
1074
1075INLINE void
1076free_coro_mortal (pTHX)
1077{
1078 if (expect_true (coro_mortal))
1079 {
1080 SvREFCNT_dec (coro_mortal);
1081 coro_mortal = 0;
1082 }
1083}
1084
1085static int
1086runops_trace (pTHX)
1087{
1088 COP *oldcop = 0;
1089 int oldcxix = -2;
1090
1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1092 {
1093 PERL_ASYNC_CHECK ();
1094
1095 if (cctx_current->flags & CC_TRACE_ALL)
1096 {
1097 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1098 {
1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1100 SV **bot, **top;
1101 AV *av = newAV (); /* return values */
1102 SV **cb;
1103 dSP;
1104
1105 GV *gv = CvGV (cx->blk_sub.cv);
1106 SV *fullname = sv_2mortal (newSV (0));
1107 if (isGV (gv))
1108 gv_efullname3 (fullname, gv, 0);
1109
1110 bot = PL_stack_base + cx->blk_oldsp + 1;
1111 top = cx->blk_gimme == G_ARRAY ? SP + 1
1112 : cx->blk_gimme == G_SCALAR ? bot + 1
1113 : bot;
1114
1115 av_extend (av, top - bot);
1116 while (bot < top)
1117 av_push (av, SvREFCNT_inc_NN (*bot++));
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 ENTER;
1121 SAVETMPS;
1122 EXTEND (SP, 3);
1123 PUSHMARK (SP);
1124 PUSHs (&PL_sv_no);
1125 PUSHs (fullname);
1126 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1127 PUTBACK;
1128 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1129 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1130 SPAGAIN;
1131 FREETMPS;
1132 LEAVE;
1133 PL_runops = runops_trace;
1134 }
1135
1136 if (oldcop != PL_curcop)
1137 {
1138 oldcop = PL_curcop;
1139
1140 if (PL_curcop != &PL_compiling)
1141 {
1142 SV **cb;
1143
1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1145 {
1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1147
1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1149 {
1150 dSP;
1151 GV *gv = CvGV (cx->blk_sub.cv);
1152 SV *fullname = sv_2mortal (newSV (0));
1153
1154 if (isGV (gv))
1155 gv_efullname3 (fullname, gv, 0);
1156
1157 PL_runops = RUNOPS_DEFAULT;
1158 ENTER;
1159 SAVETMPS;
1160 EXTEND (SP, 3);
1161 PUSHMARK (SP);
1162 PUSHs (&PL_sv_yes);
1163 PUSHs (fullname);
1164 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1165 PUTBACK;
1166 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1167 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1168 SPAGAIN;
1169 FREETMPS;
1170 LEAVE;
1171 PL_runops = runops_trace;
1172 }
1173
1174 oldcxix = cxstack_ix;
1175 }
1176
1177 if (cctx_current->flags & CC_TRACE_LINE)
1178 {
1179 dSP;
1180
1181 PL_runops = RUNOPS_DEFAULT;
1182 ENTER;
1183 SAVETMPS;
1184 EXTEND (SP, 3);
1185 PL_runops = RUNOPS_DEFAULT;
1186 PUSHMARK (SP);
1187 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1188 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1189 PUTBACK;
1190 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1191 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1192 SPAGAIN;
1193 FREETMPS;
1194 LEAVE;
1195 PL_runops = runops_trace;
1196 }
1197 }
1198 }
1199 }
1200 }
1201
1202 TAINT_NOT;
1203 return 0;
1204}
1205
1206static struct CoroSLF cctx_ssl_frame;
1207
1208static void
1209slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1210{
1211 ta->prev = 0;
1212}
1213
1214static int
1215slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1216{
1217 *frame = cctx_ssl_frame;
1218
1219 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1220}
1221
1222/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1223static void NOINLINE
1224cctx_prepare (pTHX)
1225{
1226 PL_top_env = &PL_start_env;
1227
1228 if (cctx_current->flags & CC_TRACE)
1229 PL_runops = runops_trace;
1230
1231 /* we already must be executing an SLF op, there is no other valid way
1232 * that can lead to creation of a new cctx */
1233 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1234 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1235
1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1237 cctx_ssl_frame = slf_frame;
1238
1239 slf_frame.prepare = slf_prepare_set_stacklevel;
1240 slf_frame.check = slf_check_set_stacklevel;
1241}
1242
1243/* the tail of transfer: execute stuff we can only do after a transfer */
1244INLINE void
1245transfer_tail (pTHX)
1246{
1247 free_coro_mortal (aTHX);
1248}
1249
1250/*
1251 * this is a _very_ stripped down perl interpreter ;)
1252 */
1253static void
1254cctx_run (void *arg)
1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
1262 dTHX;
1263
1264 /* normally we would need to skip the entersub here */
1265 /* not doing so will re-execute it, which is exactly what we want */
1266 /* PL_nop = PL_nop->op_next */
1267
1268 /* inject a fake subroutine call to cctx_init */
1269 cctx_prepare (aTHX);
1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
1274 /* somebody or something will hit me for both perl_run and PL_restartop */
1275 PL_restartop = PL_op;
1276 perl_run (PL_curinterp);
1277 /*
1278 * Unfortunately, there is no way to get at the return values of the
1279 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1280 * runtime errors here, as this is just a random interpreter, not a thread.
1281 */
1282
1283 /*
1284 * If perl-run returns we assume exit() was being called or the coro
1285 * fell off the end, which seems to be the only valid (non-bug)
1286 * reason for perl_run to return. We try to exit by jumping to the
1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1291 */
1292 PL_top_env = main_top_env;
1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
1295}
1296
1297static coro_cctx *
1298cctx_new ()
1299{
1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
1331
1332#if HAVE_MMAP
1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1334 /* mmap supposedly does allocate-on-write for us */
1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1336
1337 if (cctx->sptr != (void *)-1)
1338 {
1339 #if CORO_STACKGUARD
1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1341 #endif
1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1344 cctx->flags |= CC_MAPPED;
1345 }
1346 else
1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
1351
1352 if (!cctx->sptr)
1353 {
1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1355 _exit (EXIT_FAILURE);
1356 }
1357
1358 stack_start = cctx->sptr;
1359 stack_size = cctx->ssize;
1360 }
1361
1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1367
1368 return cctx;
1369}
1370
1371static void
1372cctx_destroy (coro_cctx *cctx)
1373{
1374 if (!cctx)
1375 return;
1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
1393#endif
1394 Safefree (cctx->sptr);
1395 }
1396
1397 Safefree (cctx);
1398}
1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
1403static coro_cctx *
1404cctx_get (pTHX)
1405{
1406 while (expect_true (cctx_first))
1407 {
1408 coro_cctx *cctx = cctx_first;
1409 cctx_first = cctx->next;
1410 --cctx_idle;
1411
1412 if (expect_true (!CCTX_EXPIRED (cctx)))
1413 return cctx;
1414
1415 cctx_destroy (cctx);
1416 }
1417
1418 return cctx_new_run ();
1419}
1420
1421static void
1422cctx_put (coro_cctx *cctx)
1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1426 /* free another cctx if overlimit */
1427 if (expect_false (cctx_idle >= cctx_max_idle))
1428 {
1429 coro_cctx *first = cctx_first;
1430 cctx_first = first->next;
1431 --cctx_idle;
1432
1433 cctx_destroy (first);
1434 }
1435
1436 ++cctx_idle;
1437 cctx->next = cctx_first;
1438 cctx_first = cctx;
1439}
1440
1441/** coroutine switching *****************************************************/
1442
1443static void
1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1448 if (expect_true (prev != next))
1449 {
1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1452
1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1455
1456#if !PERL_VERSION_ATLEAST (5,10,0)
1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1459#endif
1460 }
1461}
1462
1463/* always use the TRANSFER macro */
1464static void NOINLINE /* noinline so we have a fixed stackframe */
1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1466{
1467 dSTACKLEVEL;
1468
1469 /* sometimes transfer is only called to set idle_sp */
1470 if (expect_false (!prev))
1471 {
1472 cctx_current->idle_sp = STACKLEVEL;
1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1474 }
1475 else if (expect_true (prev != next))
1476 {
1477 coro_cctx *cctx_prev;
1478
1479 if (expect_false (prev->flags & CF_NEW))
1480 {
1481 /* create a new empty/source context */
1482 prev->flags &= ~CF_NEW;
1483 prev->flags |= CF_RUNNING;
1484 }
1485
1486 prev->flags &= ~CF_RUNNING;
1487 next->flags |= CF_RUNNING;
1488
1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
1491
1492 if (expect_false (next->flags & CF_NEW))
1493 {
1494 /* need to start coroutine */
1495 next->flags &= ~CF_NEW;
1496 /* setup coroutine call */
1497 coro_setup (aTHX_ next);
1498 }
1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
1508 {
1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
1519 }
1520 else
1521 prev->cctx = cctx_current;
1522
1523 ++next->usecount;
1524
1525 cctx_prev = cctx_current;
1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
1531 {
1532 cctx_prev->top_env = PL_top_env;
1533 PL_top_env = cctx_current->top_env;
1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1535 }
1536
1537 transfer_tail (aTHX);
1538 }
1539}
1540
1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1543
1544/** high level stuff ********************************************************/
1545
1546static int
1547coro_state_destroy (pTHX_ struct coro *coro)
1548{
1549 if (coro->flags & CF_DESTROYED)
1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1554
1555 coro->flags |= CF_DESTROYED;
1556
1557 if (coro->flags & CF_READY)
1558 {
1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1560 /* alternative: look through all ready queues and remove the coro */
1561 --coro_nready;
1562 }
1563 else
1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1565
1566 if (coro->mainstack
1567 && coro->mainstack != main_mainstack
1568 && coro->slot
1569 && !PL_dirty)
1570 coro_destruct_perl (aTHX_ coro);
1571
1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1576
1577 if (coro->next) coro->next->prev = coro->prev;
1578 if (coro->prev) coro->prev->next = coro->next;
1579 if (coro == coro_first) coro_first = coro->next;
1580
1581 return 1;
1582}
1583
1584static int
1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1586{
1587 struct coro *coro = (struct coro *)mg->mg_ptr;
1588 mg->mg_ptr = 0;
1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
1597
1598 return 0;
1599}
1600
1601static int
1602coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1603{
1604 struct coro *coro = (struct coro *)mg->mg_ptr;
1605
1606 ++coro->refcnt;
1607
1608 return 0;
1609}
1610
1611static MGVTBL coro_state_vtbl = {
1612 0, 0, 0, 0,
1613 coro_state_free,
1614 0,
1615#ifdef MGf_DUP
1616 coro_state_dup,
1617#else
1618# define MGf_DUP 0
1619#endif
1620};
1621
1622static void
1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1624{
1625 ta->prev = SvSTATE (prev_sv);
1626 ta->next = SvSTATE (next_sv);
1627 TRANSFER_CHECK (*ta);
1628}
1629
1630static void
1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1632{
1633 struct coro_transfer_args ta;
1634
1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1669
1670 return 0;
1671}
1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
650 dTHX; 1676 dTHX;
651 dSP; 1677 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1678
655 coro_init_stacks (aTHX); 1679 ENTER;
656 /*PL_curcop = 0;*/ 1680 SAVETMPS;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 1681
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1682 PUSHMARK (SP);
668 PUTBACK; 1683 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1685
671 if (SvTRUE (ERRSV)) 1686 FREETMPS;
672 croak (NULL); 1687 LEAVE;
673 else 1688}
674 croak ("FATAL: CCTXT coroutine returned!"); 1689
1690static int
1691api_ready (pTHX_ SV *coro_sv)
1692{
1693 struct coro *coro = SvSTATE (coro_sv);
1694
1695 if (coro->flags & CF_READY)
1696 return 0;
1697
1698 coro->flags |= CF_READY;
1699
1700 coro_enq (aTHX_ coro);
1701
1702 if (!coro_nready++)
1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
1705
1706 return 1;
1707}
1708
1709static int
1710api_is_ready (pTHX_ SV *coro_sv)
1711{
1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1713}
1714
1715/* expects to own a reference to next->hv */
1716INLINE void
1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1718{
1719 SV *prev_sv = SvRV (coro_current);
1720
1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1724 TRANSFER_CHECK (*ta);
1725
1726 SvRV_set (coro_current, (SV *)next->hv);
1727
1728 free_coro_mortal (aTHX);
1729 coro_mortal = prev_sv;
1730}
1731
1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
675 } 1736 {
676 else 1737 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1738
680 PL_op = (OP *)&myop; 1739 if (expect_true (next))
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701}
702
703static void
704continue_coro (void *arg)
705{
706 /*
707 * this is a _very_ stripped down perl interpreter ;)
708 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 {
729 if (next->mainstack)
730 { 1740 {
731 LOCK; 1741 /* cannot transfer to destroyed coros, skip and look for next */
732 SAVE (prev, flags); 1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
733 LOAD (next); 1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
734 UNLOCK; 1744 else
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 1745 {
743 if (!prev->stack) 1746 next->flags &= ~CF_READY;
744 allocate_stack (prev, 0); 1747 --coro_nready;
745 else if (prev->cursp != stacklevel 1748
746 && prev->stack->usecnt > 1) 1749 prepare_schedule_to (aTHX_ ta, next);
747 { 1750 break;
748 prev->gencnt = ++prev->stack->gencnt;
749 prev->stack->usecnt = 1;
750 }
751
752 /* has our stack been invalidated? */
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 {
755 deallocate_stack (next);
756 allocate_stack (next, 1);
757 coro_create (&(next->stack->cctx),
758 continue_coro, (void *)next,
759 next->stack->sptr, labs (next->stack->ssize));
760 }
761
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 } 1751 }
766 else
767 next->cursp = stacklevel;
768 } 1752 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else 1753 else
772 { 1754 {
773 LOCK; 1755 /* nothing to schedule: call the idle handler */
774 SAVE (prev, -1); /* first get rid of the old state */ 1756 if (SvROK (sv_idle)
775 UNLOCK; 1757 && SvOBJECT (SvRV (sv_idle)))
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 { 1758 {
779 if (!prev->stack) 1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
780 allocate_stack (prev, 0); 1760 api_ready (aTHX_ SvRV (sv_idle));
781 1761 --coro_nready;
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 {
784 PL_top_env = &next->start_env;
785
786 setup_coro (next);
787 next->cursp = stacklevel;
788
789 prev->stack->refcnt++;
790 prev->stack->usecnt++;
791 next->stack = prev->stack;
792 next->gencnt = prev->gencnt;
793 }
794 else
795 {
796 assert (!next->stack);
797 allocate_stack (next, 1);
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 }
805 } 1762 }
806 else 1763 else
807 { 1764 {
808 setup_coro (next); 1765 dSP;
809 next->cursp = stacklevel; 1766
1767 ENTER;
1768 SAVETMPS;
1769
1770 PUSHMARK (SP);
1771 PUTBACK;
1772 call_sv (sv_idle, G_VOID | G_DISCARD);
1773
1774 FREETMPS;
1775 LEAVE;
810 } 1776 }
811 } 1777 }
812 } 1778 }
1779}
813 1780
814 LOCK; 1781INLINE void
1782prepare_cede (pTHX_ struct coro_transfer_args *ta)
1783{
1784 api_ready (aTHX_ coro_current);
1785 prepare_schedule (aTHX_ ta);
1786}
1787
1788INLINE void
1789prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1790{
1791 SV *prev = SvRV (coro_current);
1792
815 if (coro_mortal) 1793 if (coro_nready)
816 {
817 SvREFCNT_dec (coro_mortal);
818 coro_mortal = 0;
819 } 1794 {
820 UNLOCK; 1795 prepare_schedule (aTHX_ ta);
821} 1796 api_ready (aTHX_ prev);
822
823#define SV_CORO(sv,func) \
824 do { \
825 if (SvROK (sv)) \
826 sv = SvRV (sv); \
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843
844#define SvSTATE(sv) (struct coro *)SvIV (sv)
845
846static void
847api_transfer(pTHX_ SV *prev, SV *next, int flags)
848{
849 SV_CORO (prev, "Coro::transfer");
850 SV_CORO (next, "Coro::transfer");
851
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
853}
854
855/** Coro ********************************************************************/
856
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void
870coro_enq (pTHX_ SV *sv)
871{
872 if (SvTYPE (sv) == SVt_PVHV)
873 { 1797 }
874 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1798 else
875 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1799 prepare_nop (aTHX_ ta);
1800}
876 1801
877 prio = prio > PRIO_MAX ? PRIO_MAX 1802static void
878 : prio < PRIO_MIN ? PRIO_MIN 1803api_schedule (pTHX)
879 : prio; 1804{
1805 struct coro_transfer_args ta;
880 1806
881 av_push (coro_ready [prio - PRIO_MIN], sv); 1807 prepare_schedule (aTHX_ &ta);
882 coro_nready++; 1808 TRANSFER (ta, 1);
1809}
883 1810
1811static void
1812api_schedule_to (pTHX_ SV *coro_sv)
1813{
1814 struct coro_transfer_args ta;
1815 struct coro *next = SvSTATE (coro_sv);
1816
1817 SvREFCNT_inc_NN (coro_sv);
1818 prepare_schedule_to (aTHX_ &ta, next);
1819}
1820
1821static int
1822api_cede (pTHX)
1823{
1824 struct coro_transfer_args ta;
1825
1826 prepare_cede (aTHX_ &ta);
1827
1828 if (expect_true (ta.prev != ta.next))
1829 {
1830 TRANSFER (ta, 1);
884 return; 1831 return 1;
1832 }
1833 else
1834 return 0;
1835}
1836
1837static int
1838api_cede_notself (pTHX)
1839{
1840 if (coro_nready)
1841 {
1842 struct coro_transfer_args ta;
1843
1844 prepare_cede_notself (aTHX_ &ta);
1845 TRANSFER (ta, 1);
1846 return 1;
1847 }
1848 else
1849 return 0;
1850}
1851
1852static void
1853api_trace (pTHX_ SV *coro_sv, int flags)
1854{
1855 struct coro *coro = SvSTATE (coro_sv);
1856
1857 if (coro->flags & CF_RUNNING)
1858 croak ("cannot enable tracing on a running coroutine, caught");
1859
1860 if (flags & CC_TRACE)
1861 {
1862 if (!coro->cctx)
1863 coro->cctx = cctx_new_run ();
1864 else if (!(coro->cctx->flags & CC_TRACE))
1865 croak ("cannot enable tracing on coroutine with custom stack, caught");
1866
1867 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1868 }
1869 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1870 {
1871 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1872
1873 if (coro->flags & CF_RUNNING)
1874 PL_runops = RUNOPS_DEFAULT;
1875 else
1876 coro->slot->runops = RUNOPS_DEFAULT;
1877 }
1878}
1879
1880static void
1881coro_call_on_destroy (pTHX_ struct coro *coro)
1882{
1883 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1884 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1885
1886 if (on_destroyp)
1887 {
1888 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1889
1890 while (AvFILLp (on_destroy) >= 0)
1891 {
1892 dSP; /* don't disturb outer sp */
1893 SV *cb = av_pop (on_destroy);
1894
1895 PUSHMARK (SP);
1896
1897 if (statusp)
1898 {
1899 int i;
1900 AV *status = (AV *)SvRV (*statusp);
1901 EXTEND (SP, AvFILLp (status) + 1);
1902
1903 for (i = 0; i <= AvFILLp (status); ++i)
1904 PUSHs (AvARRAY (status)[i]);
1905 }
1906
1907 PUTBACK;
1908 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1909 }
1910 }
1911}
1912
1913static void
1914slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 int i;
1917 HV *hv = (HV *)SvRV (coro_current);
1918 AV *av = newAV ();
1919
1920 /* items are actually not so common, so optimise for this case */
1921 if (items)
1922 {
1923 av_extend (av, items - 1);
1924
1925 for (i = 0; i < items; ++i)
1926 av_push (av, SvREFCNT_inc_NN (arg [i]));
1927 }
1928
1929 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1930
1931 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1932 api_ready (aTHX_ sv_manager);
1933
1934 frame->prepare = prepare_schedule;
1935 frame->check = slf_check_repeat;
1936
1937 /* as a minor optimisation, we could unwind all stacks here */
1938 /* but that puts extra pressure on pp_slf, and is not worth much */
1939 /*coro_unwind_stacks (aTHX);*/
1940}
1941
1942/*****************************************************************************/
1943/* async pool handler */
1944
1945static int
1946slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1947{
1948 HV *hv = (HV *)SvRV (coro_current);
1949 struct coro *coro = (struct coro *)frame->data;
1950
1951 if (!coro->invoke_cb)
1952 return 1; /* loop till we have invoke */
1953 else
1954 {
1955 hv_store (hv, "desc", sizeof ("desc") - 1,
1956 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1957
1958 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1959
1960 {
1961 dSP;
1962 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1963 PUTBACK;
885 } 1964 }
886 1965
887 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1966 SvREFCNT_dec (GvAV (PL_defgv));
1967 GvAV (PL_defgv) = coro->invoke_av;
1968 coro->invoke_av = 0;
1969
1970 return 0;
1971 }
1972}
1973
1974static void
1975slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1976{
1977 HV *hv = (HV *)SvRV (coro_current);
1978 struct coro *coro = SvSTATE_hv ((SV *)hv);
1979
1980 if (expect_true (coro->saved_deffh))
1981 {
1982 /* subsequent iteration */
1983 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1984 coro->saved_deffh = 0;
1985
1986 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1987 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1988 {
1989 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1990 coro->invoke_av = newAV ();
1991
1992 frame->prepare = prepare_nop;
1993 }
1994 else
1995 {
1996 av_clear (GvAV (PL_defgv));
1997 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (aTHX_ coro_current, 0);
2003
2004 frame->prepare = prepare_schedule;
2005 av_push (av_async_pool, SvREFCNT_inc (hv));
2006 }
2007 }
2008 else
2009 {
2010 /* first iteration, simply fall through */
2011 frame->prepare = prepare_nop;
2012 }
2013
2014 frame->check = slf_check_pool_handler;
2015 frame->data = (void *)coro;
2016}
2017
2018/*****************************************************************************/
2019/* rouse callback */
2020
2021#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2022
2023static void
2024coro_rouse_callback (pTHX_ CV *cv)
2025{
2026 dXSARGS;
2027 SV *data = (SV *)S_GENSUB_ARG;
2028
2029 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2030 {
2031 /* first call, set args */
2032 SV *coro = SvRV (data);
2033 AV *av = newAV ();
2034
2035 SvRV_set (data, (SV *)av);
2036
2037 /* better take a full copy of the arguments */
2038 while (items--)
2039 av_store (av, items, newSVsv (ST (items)));
2040
2041 api_ready (aTHX_ coro);
2042 SvREFCNT_dec (coro);
2043 }
2044
2045 XSRETURN_EMPTY;
2046}
2047
2048static int
2049slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2050{
2051 SV *data = (SV *)frame->data;
2052
2053 if (CORO_THROW)
2054 return 0;
2055
2056 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2057 return 1;
2058
2059 /* now push all results on the stack */
2060 {
2061 dSP;
2062 AV *av = (AV *)SvRV (data);
2063 int i;
2064
2065 EXTEND (SP, AvFILLp (av) + 1);
2066 for (i = 0; i <= AvFILLp (av); ++i)
2067 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2068
2069 /* we have stolen the elements, so set length to zero and free */
2070 AvFILLp (av) = -1;
2071 av_undef (av);
2072
2073 PUTBACK;
2074 }
2075
2076 return 0;
2077}
2078
2079static void
2080slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2081{
2082 SV *cb;
2083
2084 if (items)
2085 cb = arg [0];
2086 else
2087 {
2088 struct coro *coro = SvSTATE_current;
2089
2090 if (!coro->rouse_cb)
2091 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2092
2093 cb = sv_2mortal (coro->rouse_cb);
2094 coro->rouse_cb = 0;
2095 }
2096
2097 if (!SvROK (cb)
2098 || SvTYPE (SvRV (cb)) != SVt_PVCV
2099 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2100 croak ("Coro::rouse_wait called with illegal callback argument,");
2101
2102 {
2103 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 frame->data = (void *)data;
2107 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2108 frame->check = slf_check_rouse_wait;
2109 }
888} 2110}
889 2111
890static SV * 2112static SV *
891coro_deq (pTHX_ int min_prio) 2113coro_new_rouse_cb (pTHX)
892{ 2114{
893 int prio = PRIO_MAX - PRIO_MIN; 2115 HV *hv = (HV *)SvRV (coro_current);
2116 struct coro *coro = SvSTATE_hv (hv);
2117 SV *data = newRV_inc ((SV *)hv);
2118 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
894 2119
895 min_prio -= PRIO_MIN; 2120 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
896 if (min_prio < 0) 2121 SvREFCNT_dec (data); /* magicext increases the refcount */
897 min_prio = 0;
898 2122
899 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2123 SvREFCNT_dec (coro->rouse_cb);
900 if (av_len (coro_ready[prio]) >= 0) 2124 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2125
2126 return cb;
2127}
2128
2129/*****************************************************************************/
2130/* schedule-like-function opcode (SLF) */
2131
2132static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2133static const CV *slf_cv;
2134static SV **slf_argv;
2135static int slf_argc, slf_arga; /* count, allocated */
2136static I32 slf_ax; /* top of stack, for restore */
2137
2138/* this restores the stack in the case we patched the entersub, to */
2139/* recreate the stack frame as perl will on following calls */
2140/* since entersub cleared the stack */
2141static OP *
2142pp_restore (pTHX)
2143{
2144 int i;
2145 SV **SP = PL_stack_base + slf_ax;
2146
2147 PUSHMARK (SP);
2148
2149 EXTEND (SP, slf_argc + 1);
2150
2151 for (i = 0; i < slf_argc; ++i)
2152 PUSHs (sv_2mortal (slf_argv [i]));
2153
2154 PUSHs ((SV *)CvGV (slf_cv));
2155
2156 RETURNOP (slf_restore.op_first);
2157}
2158
2159static void
2160slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2161{
2162 SV **arg = (SV **)slf_frame.data;
2163
2164 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2165}
2166
2167static void
2168slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2169{
2170 if (items != 2)
2171 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2172
2173 frame->prepare = slf_prepare_transfer;
2174 frame->check = slf_check_nop;
2175 frame->data = (void *)arg; /* let's hope it will stay valid */
2176}
2177
2178static void
2179slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 frame->prepare = prepare_schedule;
2182 frame->check = slf_check_nop;
2183}
2184
2185static void
2186slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2187{
2188 struct coro *next = (struct coro *)slf_frame.data;
2189
2190 SvREFCNT_inc_NN (next->hv);
2191 prepare_schedule_to (aTHX_ ta, next);
2192}
2193
2194static void
2195slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 if (!items)
2198 croak ("Coro::schedule_to expects a coroutine argument, caught");
2199
2200 frame->data = (void *)SvSTATE (arg [0]);
2201 frame->prepare = slf_prepare_schedule_to;
2202 frame->check = slf_check_nop;
2203}
2204
2205static void
2206slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
2208 api_ready (aTHX_ SvRV (coro_current));
2209
2210 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2211}
2212
2213static void
2214slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2215{
2216 frame->prepare = prepare_cede;
2217 frame->check = slf_check_nop;
2218}
2219
2220static void
2221slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2222{
2223 frame->prepare = prepare_cede_notself;
2224 frame->check = slf_check_nop;
2225}
2226
2227/*
2228 * these not obviously related functions are all rolled into one
2229 * function to increase chances that they all will call transfer with the same
2230 * stack offset
2231 * SLF stands for "schedule-like-function".
2232 */
2233static OP *
2234pp_slf (pTHX)
2235{
2236 I32 checkmark; /* mark SP to see how many elements check has pushed */
2237
2238 /* set up the slf frame, unless it has already been set-up */
2239 /* the latter happens when a new coro has been started */
2240 /* or when a new cctx was attached to an existing coroutine */
2241 if (expect_true (!slf_frame.prepare))
2242 {
2243 /* first iteration */
2244 dSP;
2245 SV **arg = PL_stack_base + TOPMARK + 1;
2246 int items = SP - arg; /* args without function object */
2247 SV *gv = *sp;
2248
2249 /* do a quick consistency check on the "function" object, and if it isn't */
2250 /* for us, divert to the real entersub */
2251 if (SvTYPE (gv) != SVt_PVGV
2252 || !GvCV (gv)
2253 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2254 return PL_ppaddr[OP_ENTERSUB](aTHX);
2255
2256 if (!(PL_op->op_flags & OPf_STACKED))
901 { 2257 {
902 coro_nready--; 2258 /* ampersand-form of call, use @_ instead of stack */
903 return av_shift (coro_ready[prio]); 2259 AV *av = GvAV (PL_defgv);
2260 arg = AvARRAY (av);
2261 items = AvFILLp (av) + 1;
904 } 2262 }
2263
2264 /* now call the init function, which needs to set up slf_frame */
2265 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2266 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2267
2268 /* pop args */
2269 SP = PL_stack_base + POPMARK;
2270
2271 PUTBACK;
2272 }
2273
2274 /* now that we have a slf_frame, interpret it! */
2275 /* we use a callback system not to make the code needlessly */
2276 /* complicated, but so we can run multiple perl coros from one cctx */
2277
2278 do
2279 {
2280 struct coro_transfer_args ta;
2281
2282 slf_frame.prepare (aTHX_ &ta);
2283 TRANSFER (ta, 0);
2284
2285 checkmark = PL_stack_sp - PL_stack_base;
2286 }
2287 while (slf_frame.check (aTHX_ &slf_frame));
2288
2289 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2290
2291 /* exception handling */
2292 if (expect_false (CORO_THROW))
2293 {
2294 SV *exception = sv_2mortal (CORO_THROW);
2295
2296 CORO_THROW = 0;
2297 sv_setsv (ERRSV, exception);
2298 croak (0);
2299 }
2300
2301 /* return value handling - mostly like entersub */
2302 /* make sure we put something on the stack in scalar context */
2303 if (GIMME_V == G_SCALAR)
2304 {
2305 dSP;
2306 SV **bot = PL_stack_base + checkmark;
2307
2308 if (sp == bot) /* too few, push undef */
2309 bot [1] = &PL_sv_undef;
2310 else if (sp != bot + 1) /* too many, take last one */
2311 bot [1] = *sp;
2312
2313 SP = bot + 1;
2314
2315 PUTBACK;
2316 }
2317
2318 return NORMAL;
2319}
2320
2321static void
2322api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2323{
2324 int i;
2325 SV **arg = PL_stack_base + ax;
2326 int items = PL_stack_sp - arg + 1;
2327
2328 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2329
2330 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2331 && PL_op->op_ppaddr != pp_slf)
2332 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2333
2334 CvFLAGS (cv) |= CVf_SLF;
2335 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2336 slf_cv = cv;
2337
2338 /* we patch the op, and then re-run the whole call */
2339 /* we have to put the same argument on the stack for this to work */
2340 /* and this will be done by pp_restore */
2341 slf_restore.op_next = (OP *)&slf_restore;
2342 slf_restore.op_type = OP_CUSTOM;
2343 slf_restore.op_ppaddr = pp_restore;
2344 slf_restore.op_first = PL_op;
2345
2346 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2347
2348 if (PL_op->op_flags & OPf_STACKED)
2349 {
2350 if (items > slf_arga)
2351 {
2352 slf_arga = items;
2353 free (slf_argv);
2354 slf_argv = malloc (slf_arga * sizeof (SV *));
2355 }
2356
2357 slf_argc = items;
2358
2359 for (i = 0; i < items; ++i)
2360 slf_argv [i] = SvREFCNT_inc (arg [i]);
2361 }
2362 else
2363 slf_argc = 0;
2364
2365 PL_op->op_ppaddr = pp_slf;
2366 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2367
2368 PL_op = (OP *)&slf_restore;
2369}
2370
2371/*****************************************************************************/
2372/* dynamic wind */
2373
2374static void
2375on_enterleave_call (pTHX_ SV *cb)
2376{
2377 dSP;
2378
2379 PUSHSTACK;
2380
2381 PUSHMARK (SP);
2382 PUTBACK;
2383 call_sv (cb, G_VOID | G_DISCARD);
2384 SPAGAIN;
2385
2386 POPSTACK;
2387}
2388
2389static SV *
2390coro_avp_pop_and_free (pTHX_ AV **avp)
2391{
2392 AV *av = *avp;
2393 SV *res = av_pop (av);
2394
2395 if (AvFILLp (av) < 0)
2396 {
2397 *avp = 0;
2398 SvREFCNT_dec (av);
2399 }
2400
2401 return res;
2402}
2403
2404static void
2405coro_pop_on_enter (pTHX_ void *coro)
2406{
2407 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2408 SvREFCNT_dec (cb);
2409}
2410
2411static void
2412coro_pop_on_leave (pTHX_ void *coro)
2413{
2414 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2415 on_enterleave_call (aTHX_ sv_2mortal (cb));
2416}
2417
2418/*****************************************************************************/
2419/* PerlIO::cede */
2420
2421typedef struct
2422{
2423 PerlIOBuf base;
2424 NV next, every;
2425} PerlIOCede;
2426
2427static IV
2428PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2429{
2430 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2431
2432 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2433 self->next = nvtime () + self->every;
2434
2435 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2436}
2437
2438static SV *
2439PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2440{
2441 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2442
2443 return newSVnv (self->every);
2444}
2445
2446static IV
2447PerlIOCede_flush (pTHX_ PerlIO *f)
2448{
2449 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2450 double now = nvtime ();
2451
2452 if (now >= self->next)
2453 {
2454 api_cede (aTHX);
2455 self->next = now + self->every;
2456 }
2457
2458 return PerlIOBuf_flush (aTHX_ f);
2459}
2460
2461static PerlIO_funcs PerlIO_cede =
2462{
2463 sizeof(PerlIO_funcs),
2464 "cede",
2465 sizeof(PerlIOCede),
2466 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2467 PerlIOCede_pushed,
2468 PerlIOBuf_popped,
2469 PerlIOBuf_open,
2470 PerlIOBase_binmode,
2471 PerlIOCede_getarg,
2472 PerlIOBase_fileno,
2473 PerlIOBuf_dup,
2474 PerlIOBuf_read,
2475 PerlIOBuf_unread,
2476 PerlIOBuf_write,
2477 PerlIOBuf_seek,
2478 PerlIOBuf_tell,
2479 PerlIOBuf_close,
2480 PerlIOCede_flush,
2481 PerlIOBuf_fill,
2482 PerlIOBase_eof,
2483 PerlIOBase_error,
2484 PerlIOBase_clearerr,
2485 PerlIOBase_setlinebuf,
2486 PerlIOBuf_get_base,
2487 PerlIOBuf_bufsiz,
2488 PerlIOBuf_get_ptr,
2489 PerlIOBuf_get_cnt,
2490 PerlIOBuf_set_ptrcnt,
2491};
2492
2493/*****************************************************************************/
2494/* Coro::Semaphore & Coro::Signal */
2495
2496static SV *
2497coro_waitarray_new (pTHX_ int count)
2498{
2499 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2500 AV *av = newAV ();
2501 SV **ary;
2502
2503 /* unfortunately, building manually saves memory */
2504 Newx (ary, 2, SV *);
2505 AvALLOC (av) = ary;
2506#if PERL_VERSION_ATLEAST (5,10,0)
2507 AvARRAY (av) = ary;
2508#else
2509 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2510 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2511 SvPVX ((SV *)av) = (char *)ary;
2512#endif
2513 AvMAX (av) = 1;
2514 AvFILLp (av) = 0;
2515 ary [0] = newSViv (count);
2516
2517 return newRV_noinc ((SV *)av);
2518}
2519
2520/* semaphore */
2521
2522static void
2523coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2524{
2525 SV *count_sv = AvARRAY (av)[0];
2526 IV count = SvIVX (count_sv);
2527
2528 count += adjust;
2529 SvIVX (count_sv) = count;
2530
2531 /* now wake up as many waiters as are expected to lock */
2532 while (count > 0 && AvFILLp (av) > 0)
2533 {
2534 SV *cb;
2535
2536 /* swap first two elements so we can shift a waiter */
2537 AvARRAY (av)[0] = AvARRAY (av)[1];
2538 AvARRAY (av)[1] = count_sv;
2539 cb = av_shift (av);
2540
2541 if (SvOBJECT (cb))
2542 {
2543 api_ready (aTHX_ cb);
2544 --count;
2545 }
2546 else if (SvTYPE (cb) == SVt_PVCV)
2547 {
2548 dSP;
2549 PUSHMARK (SP);
2550 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2551 PUTBACK;
2552 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2553 }
2554
2555 SvREFCNT_dec (cb);
2556 }
2557}
2558
2559static void
2560coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2561{
2562 /* call $sem->adjust (0) to possibly wake up some other waiters */
2563 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2564}
2565
2566static int
2567slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2568{
2569 AV *av = (AV *)frame->data;
2570 SV *count_sv = AvARRAY (av)[0];
2571
2572 /* if we are about to throw, don't actually acquire the lock, just throw */
2573 if (CORO_THROW)
2574 return 0;
2575 else if (SvIVX (count_sv) > 0)
2576 {
2577 SvSTATE_current->on_destroy = 0;
2578
2579 if (acquire)
2580 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2581 else
2582 coro_semaphore_adjust (aTHX_ av, 0);
2583
2584 return 0;
2585 }
2586 else
2587 {
2588 int i;
2589 /* if we were woken up but can't down, we look through the whole */
2590 /* waiters list and only add us if we aren't in there already */
2591 /* this avoids some degenerate memory usage cases */
2592
2593 for (i = 1; i <= AvFILLp (av); ++i)
2594 if (AvARRAY (av)[i] == SvRV (coro_current))
2595 return 1;
2596
2597 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2598 return 1;
2599 }
2600}
2601
2602static int
2603slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2604{
2605 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2606}
2607
2608static int
2609slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2610{
2611 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2612}
2613
2614static void
2615slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2616{
2617 AV *av = (AV *)SvRV (arg [0]);
2618
2619 if (SvIVX (AvARRAY (av)[0]) > 0)
2620 {
2621 frame->data = (void *)av;
2622 frame->prepare = prepare_nop;
2623 }
2624 else
2625 {
2626 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2627
2628 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2629 frame->prepare = prepare_schedule;
2630
2631 /* to avoid race conditions when a woken-up coro gets terminated */
2632 /* we arrange for a temporary on_destroy that calls adjust (0) */
2633 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2634 }
2635}
2636
2637static void
2638slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2639{
2640 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2641 frame->check = slf_check_semaphore_down;
2642}
2643
2644static void
2645slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 if (items >= 2)
2648 {
2649 /* callback form */
2650 AV *av = (AV *)SvRV (arg [0]);
2651 SV *cb_cv = s_get_cv_croak (arg [1]);
2652
2653 av_push (av, SvREFCNT_inc_NN (cb_cv));
2654
2655 if (SvIVX (AvARRAY (av)[0]) > 0)
2656 coro_semaphore_adjust (aTHX_ av, 0);
2657
2658 frame->prepare = prepare_nop;
2659 frame->check = slf_check_nop;
2660 }
2661 else
2662 {
2663 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2664 frame->check = slf_check_semaphore_wait;
2665 }
2666}
2667
2668/* signal */
2669
2670static void
2671coro_signal_wake (pTHX_ AV *av, int count)
2672{
2673 SvIVX (AvARRAY (av)[0]) = 0;
2674
2675 /* now signal count waiters */
2676 while (count > 0 && AvFILLp (av) > 0)
2677 {
2678 SV *cb;
2679
2680 /* swap first two elements so we can shift a waiter */
2681 cb = AvARRAY (av)[0];
2682 AvARRAY (av)[0] = AvARRAY (av)[1];
2683 AvARRAY (av)[1] = cb;
2684
2685 cb = av_shift (av);
2686
2687 if (SvTYPE (cb) == SVt_PVCV)
2688 {
2689 dSP;
2690 PUSHMARK (SP);
2691 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2692 PUTBACK;
2693 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2694 }
2695 else
2696 {
2697 api_ready (aTHX_ cb);
2698 sv_setiv (cb, 0); /* signal waiter */
2699 }
2700
2701 SvREFCNT_dec (cb);
2702
2703 --count;
2704 }
2705}
2706
2707static int
2708slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2709{
2710 /* if we are about to throw, also stop waiting */
2711 return SvROK ((SV *)frame->data) && !CORO_THROW;
2712}
2713
2714static void
2715slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 AV *av = (AV *)SvRV (arg [0]);
2718
2719 if (items >= 2)
2720 {
2721 SV *cb_cv = s_get_cv_croak (arg [1]);
2722 av_push (av, SvREFCNT_inc_NN (cb_cv));
2723
2724 if (SvIVX (AvARRAY (av)[0]))
2725 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2726
2727 frame->prepare = prepare_nop;
2728 frame->check = slf_check_nop;
2729 }
2730 else if (SvIVX (AvARRAY (av)[0]))
2731 {
2732 SvIVX (AvARRAY (av)[0]) = 0;
2733 frame->prepare = prepare_nop;
2734 frame->check = slf_check_nop;
2735 }
2736 else
2737 {
2738 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2739
2740 av_push (av, waiter);
2741
2742 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2743 frame->prepare = prepare_schedule;
2744 frame->check = slf_check_signal_wait;
2745 }
2746}
2747
2748/*****************************************************************************/
2749/* Coro::AIO */
2750
2751#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2752
2753/* helper storage struct */
2754struct io_state
2755{
2756 int errorno;
2757 I32 laststype; /* U16 in 5.10.0 */
2758 int laststatval;
2759 Stat_t statcache;
2760};
2761
2762static void
2763coro_aio_callback (pTHX_ CV *cv)
2764{
2765 dXSARGS;
2766 AV *state = (AV *)S_GENSUB_ARG;
2767 SV *coro = av_pop (state);
2768 SV *data_sv = newSV (sizeof (struct io_state));
2769
2770 av_extend (state, items - 1);
2771
2772 sv_upgrade (data_sv, SVt_PV);
2773 SvCUR_set (data_sv, sizeof (struct io_state));
2774 SvPOK_only (data_sv);
2775
2776 {
2777 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2778
2779 data->errorno = errno;
2780 data->laststype = PL_laststype;
2781 data->laststatval = PL_laststatval;
2782 data->statcache = PL_statcache;
2783 }
2784
2785 /* now build the result vector out of all the parameters and the data_sv */
2786 {
2787 int i;
2788
2789 for (i = 0; i < items; ++i)
2790 av_push (state, SvREFCNT_inc_NN (ST (i)));
2791 }
2792
2793 av_push (state, data_sv);
2794
2795 api_ready (aTHX_ coro);
2796 SvREFCNT_dec (coro);
2797 SvREFCNT_dec ((AV *)state);
2798}
2799
2800static int
2801slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2802{
2803 AV *state = (AV *)frame->data;
2804
2805 /* if we are about to throw, return early */
2806 /* this does not cancel the aio request, but at least */
2807 /* it quickly returns */
2808 if (CORO_THROW)
2809 return 0;
2810
2811 /* one element that is an RV? repeat! */
2812 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2813 return 1;
2814
2815 /* restore status */
2816 {
2817 SV *data_sv = av_pop (state);
2818 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2819
2820 errno = data->errorno;
2821 PL_laststype = data->laststype;
2822 PL_laststatval = data->laststatval;
2823 PL_statcache = data->statcache;
2824
2825 SvREFCNT_dec (data_sv);
2826 }
2827
2828 /* push result values */
2829 {
2830 dSP;
2831 int i;
2832
2833 EXTEND (SP, AvFILLp (state) + 1);
2834 for (i = 0; i <= AvFILLp (state); ++i)
2835 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2836
2837 PUTBACK;
2838 }
905 2839
906 return 0; 2840 return 0;
907} 2841}
908 2842
909static void 2843static void
910api_ready (SV *coro) 2844slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
911{ 2845{
912 dTHX; 2846 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
913
914 if (SvROK (coro))
915 coro = SvRV (coro);
916
917 LOCK;
918 coro_enq (aTHX_ SvREFCNT_inc (coro));
919 UNLOCK;
920}
921
922static void
923api_schedule (void)
924{
925 dTHX;
926
927 SV *prev, *next;
928
929 LOCK;
930
931 prev = SvRV (GvSV (coro_current)); 2847 SV *coro_hv = SvRV (coro_current);
932 next = coro_deq (aTHX_ PRIO_MIN); 2848 struct coro *coro = SvSTATE_hv (coro_hv);
933 2849
934 if (!next) 2850 /* put our coroutine id on the state arg */
935 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2851 av_push (state, SvREFCNT_inc_NN (coro_hv));
936 2852
937 /* free this only after the transfer */ 2853 /* first see whether we have a non-zero priority and set it as AIO prio */
938 coro_mortal = prev; 2854 if (coro->prio)
939 SV_CORO (prev, "Coro::schedule"); 2855 {
2856 dSP;
940 2857
941 SvRV (GvSV (coro_current)) = next; 2858 static SV *prio_cv;
2859 static SV *prio_sv;
942 2860
943 SV_CORO (next, "Coro::schedule"); 2861 if (expect_false (!prio_cv))
2862 {
2863 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2864 prio_sv = newSViv (0);
2865 }
944 2866
945 UNLOCK; 2867 PUSHMARK (SP);
2868 sv_setiv (prio_sv, coro->prio);
2869 XPUSHs (prio_sv);
946 2870
947 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2871 PUTBACK;
948 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2872 call_sv (prio_cv, G_VOID | G_DISCARD);
949} 2873 }
950 2874
951static void 2875 /* now call the original request */
952api_cede (void) 2876 {
953{ 2877 dSP;
954 dTHX; 2878 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2879 int i;
955 2880
956 LOCK; 2881 PUSHMARK (SP);
957 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
958 UNLOCK;
959 2882
960 api_schedule (); 2883 /* first push all args to the stack */
961} 2884 EXTEND (SP, items + 1);
962 2885
2886 for (i = 0; i < items; ++i)
2887 PUSHs (arg [i]);
2888
2889 /* now push the callback closure */
2890 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2891
2892 /* now call the AIO function - we assume our request is uncancelable */
2893 PUTBACK;
2894 call_sv ((SV *)req, G_VOID | G_DISCARD);
2895 }
2896
2897 /* now that the requets is going, we loop toll we have a result */
2898 frame->data = (void *)state;
2899 frame->prepare = prepare_schedule;
2900 frame->check = slf_check_aio_req;
2901}
2902
2903static void
2904coro_aio_req_xs (pTHX_ CV *cv)
2905{
2906 dXSARGS;
2907
2908 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2909
2910 XSRETURN_EMPTY;
2911}
2912
2913/*****************************************************************************/
2914
2915#if CORO_CLONE
2916# include "clone.c"
2917#endif
2918
2919/*****************************************************************************/
2920
2921static SV *
2922coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2923{
2924 SV *coro_sv;
2925 struct coro *coro;
2926 MAGIC *mg;
2927 HV *hv;
2928 SV *cb;
2929 int i;
2930
2931 if (argc > 0)
2932 {
2933 cb = s_get_cv_croak (argv [0]);
2934
2935 if (!is_coro)
2936 {
2937 if (CvISXSUB (cb))
2938 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2939
2940 if (!CvROOT (cb))
2941 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2942 }
2943 }
2944
2945 Newz (0, coro, 1, struct coro);
2946 coro->args = newAV ();
2947 coro->flags = CF_NEW;
2948
2949 if (coro_first) coro_first->prev = coro;
2950 coro->next = coro_first;
2951 coro_first = coro;
2952
2953 coro->hv = hv = newHV ();
2954 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2955 mg->mg_flags |= MGf_DUP;
2956 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2957
2958 if (argc > 0)
2959 {
2960 av_extend (coro->args, argc + is_coro - 1);
2961
2962 if (is_coro)
2963 {
2964 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2965 cb = (SV *)cv_coro_run;
2966 }
2967
2968 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2969
2970 for (i = 1; i < argc; i++)
2971 av_push (coro->args, newSVsv (argv [i]));
2972 }
2973
2974 return coro_sv;
2975}
2976
963MODULE = Coro::State PACKAGE = Coro::State 2977MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
964 2978
965PROTOTYPES: ENABLE 2979PROTOTYPES: DISABLE
966 2980
967BOOT: 2981BOOT:
968{ /* {} necessary for stoopid perl-5.6.x */ 2982{
969#ifdef USE_ITHREADS 2983#ifdef USE_ITHREADS
970 MUTEX_INIT (&coro_mutex); 2984# if CORO_PTHREAD
2985 coro_thx = PERL_GET_CONTEXT;
2986# endif
971#endif 2987#endif
2988 BOOT_PAGESIZE;
972 2989
973 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2990 cctx_current = cctx_new_empty ();
974 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2991
2992 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2993 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2994
2995 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2996 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2997 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2998
2999 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3000 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3001 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3002
975 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3003 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976 3004
977 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3005 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
978 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3006 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
979 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3007 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
980 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3008 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
981 3009
982 main_mainstack = PL_mainstack; 3010 main_mainstack = PL_mainstack;
3011 main_top_env = PL_top_env;
983 3012
3013 while (main_top_env->je_prev)
3014 main_top_env = main_top_env->je_prev;
3015
3016 {
3017 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3018
3019 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3020 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3021
3022 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3023 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3024 }
3025
984 coroapi.ver = CORO_API_VERSION; 3026 coroapi.ver = CORO_API_VERSION;
3027 coroapi.rev = CORO_API_REVISION;
3028
985 coroapi.transfer = api_transfer; 3029 coroapi.transfer = api_transfer;
986}
987 3030
988Coro::State 3031 coroapi.sv_state = SvSTATE_;
989_newprocess(args) 3032 coroapi.execute_slf = api_execute_slf;
990 SV * args 3033 coroapi.prepare_nop = prepare_nop;
991 PROTOTYPE: $ 3034 coroapi.prepare_schedule = prepare_schedule;
3035 coroapi.prepare_cede = prepare_cede;
3036 coroapi.prepare_cede_notself = prepare_cede_notself;
3037
3038 {
3039 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3040
3041 if (!svp) croak ("Time::HiRes is required");
3042 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3043
3044 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3045
3046 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3047 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3048 }
3049
3050 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3051}
3052
3053SV *
3054new (SV *klass, ...)
3055 ALIAS:
3056 Coro::new = 1
992 CODE: 3057 CODE:
993 Coro__State coro; 3058 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
994 3059 OUTPUT:
995 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996 croak ("Coro::State::_newprocess expects an arrayref");
997
998 Newz (0, coro, 1, struct coro);
999
1000 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
1001 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1002 /*coro->stack = 0;*/
1003
1004 /* same as JMPENV_BOOTSTRAP */
1005 /* we might be able to recycle start_env, but safe is safe */
1006 /*Zero(&coro->start_env, 1, JMPENV);*/
1007 coro->start_env.je_ret = -1;
1008 coro->start_env.je_mustcatch = TRUE;
1009
1010 RETVAL = coro;
1011 OUTPUT:
1012 RETVAL 3060 RETVAL
1013 3061
1014void 3062void
1015transfer(prev, next, flags) 3063transfer (...)
1016 SV *prev
1017 SV *next
1018 int flags
1019 PROTOTYPE: @ 3064 PROTOTYPE: $$
1020 CODE: 3065 CODE:
1021 PUTBACK; 3066 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1022 SV_CORO (next, "Coro::transfer"); 3067
1023 SV_CORO (prev, "Coro::transfer"); 3068bool
1024 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3069_destroy (SV *coro_sv)
1025 SPAGAIN; 3070 CODE:
3071 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3072 OUTPUT:
3073 RETVAL
1026 3074
1027void 3075void
1028DESTROY(coro)
1029 Coro::State coro
1030 CODE:
1031
1032 if (coro->mainstack && coro->mainstack != main_mainstack)
1033 {
1034 struct coro temp;
1035
1036 PUTBACK;
1037 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1038 LOAD (aTHX_ coro);
1039 SPAGAIN;
1040
1041 destroy_stacks (aTHX);
1042
1043 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044 SPAGAIN;
1045
1046 coro->mainstack = 0;
1047 }
1048
1049 deallocate_stack (coro);
1050 SvREFCNT_dec (coro->args);
1051 Safefree (coro);
1052
1053void
1054_exit(code) 3076_exit (int code)
1055 int code
1056 PROTOTYPE: $ 3077 PROTOTYPE: $
1057 CODE: 3078 CODE:
1058 _exit (code); 3079 _exit (code);
1059 3080
1060MODULE = Coro::State PACKAGE = Coro::Cont 3081SV *
3082clone (Coro::State coro)
3083 CODE:
3084{
3085#if CORO_CLONE
3086 struct coro *ncoro = coro_clone (aTHX_ coro);
3087 MAGIC *mg;
3088 /* TODO: too much duplication */
3089 ncoro->hv = newHV ();
3090 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3091 mg->mg_flags |= MGf_DUP;
3092 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3093#else
3094 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3095#endif
3096}
3097 OUTPUT:
3098 RETVAL
1061 3099
1062# this is slightly dirty (should expose a c-level api) 3100int
3101cctx_stacksize (int new_stacksize = 0)
3102 PROTOTYPE: ;$
3103 CODE:
3104 RETVAL = cctx_stacksize;
3105 if (new_stacksize)
3106 {
3107 cctx_stacksize = new_stacksize;
3108 ++cctx_gen;
3109 }
3110 OUTPUT:
3111 RETVAL
3112
3113int
3114cctx_max_idle (int max_idle = 0)
3115 PROTOTYPE: ;$
3116 CODE:
3117 RETVAL = cctx_max_idle;
3118 if (max_idle > 1)
3119 cctx_max_idle = max_idle;
3120 OUTPUT:
3121 RETVAL
3122
3123int
3124cctx_count ()
3125 PROTOTYPE:
3126 CODE:
3127 RETVAL = cctx_count;
3128 OUTPUT:
3129 RETVAL
3130
3131int
3132cctx_idle ()
3133 PROTOTYPE:
3134 CODE:
3135 RETVAL = cctx_idle;
3136 OUTPUT:
3137 RETVAL
1063 3138
1064void 3139void
1065yield(...) 3140list ()
1066 PROTOTYPE: @ 3141 PROTOTYPE:
3142 PPCODE:
3143{
3144 struct coro *coro;
3145 for (coro = coro_first; coro; coro = coro->next)
3146 if (coro->hv)
3147 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3148}
3149
3150void
3151call (Coro::State coro, SV *coderef)
3152 ALIAS:
3153 eval = 1
3154 CODE:
3155{
3156 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3157 {
3158 struct coro *current = SvSTATE_current;
3159
3160 if (current != coro)
3161 {
3162 PUTBACK;
3163 save_perl (aTHX_ current);
3164 load_perl (aTHX_ coro);
3165 SPAGAIN;
3166 }
3167
3168 PUSHSTACK;
3169
3170 PUSHMARK (SP);
3171 PUTBACK;
3172
3173 if (ix)
3174 eval_sv (coderef, 0);
3175 else
3176 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3177
3178 POPSTACK;
3179 SPAGAIN;
3180
3181 if (current != coro)
3182 {
3183 PUTBACK;
3184 save_perl (aTHX_ coro);
3185 load_perl (aTHX_ current);
3186 SPAGAIN;
3187 }
3188 }
3189}
3190
3191SV *
3192is_ready (Coro::State coro)
3193 PROTOTYPE: $
3194 ALIAS:
3195 is_ready = CF_READY
3196 is_running = CF_RUNNING
3197 is_new = CF_NEW
3198 is_destroyed = CF_DESTROYED
3199 is_suspended = CF_SUSPENDED
3200 CODE:
3201 RETVAL = boolSV (coro->flags & ix);
3202 OUTPUT:
3203 RETVAL
3204
3205void
3206throw (Coro::State self, SV *throw = &PL_sv_undef)
3207 PROTOTYPE: $;$
1067 CODE: 3208 CODE:
1068 SV *yieldstack; 3209{
1069 SV *sv; 3210 struct coro *current = SvSTATE_current;
1070 AV *defav = GvAV (PL_defgv); 3211 SV **throwp = self == current ? &CORO_THROW : &self->except;
1071 struct coro *prev, *next;
1072
1073 yieldstack = *hv_fetch (
1074 (HV *)SvRV (GvSV (coro_current)),
1075 "yieldstack", sizeof ("yieldstack") - 1,
1076 0
1077 );
1078
1079 /* set up @_ -- ugly */
1080 av_clear (defav);
1081 av_fill (defav, items - 1);
1082 while (items--)
1083 av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085 sv = av_pop ((AV *)SvRV (yieldstack));
1086 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088 SvREFCNT_dec (sv); 3212 SvREFCNT_dec (*throwp);
1089 3213 SvGETMAGIC (throw);
1090 transfer (aTHX_ prev, next, 0); 3214 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
1091
1092MODULE = Coro::State PACKAGE = Coro
1093
1094# this is slightly dirty (should expose a c-level api)
1095
1096BOOT:
1097{
1098 int i;
1099 HV *stash = gv_stashpv ("Coro", TRUE);
1100
1101 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107
1108 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1109 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1110
1111 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1112 coro_ready[i] = newAV ();
1113
1114 {
1115 SV *sv = perl_get_sv("Coro::API", 1);
1116
1117 coroapi.schedule = api_schedule;
1118 coroapi.cede = api_cede;
1119 coroapi.ready = api_ready;
1120 coroapi.nready = &coro_nready;
1121 coroapi.current = coro_current;
1122
1123 GCoroAPI = &coroapi;
1124 sv_setiv(sv, (IV)&coroapi);
1125 SvREADONLY_on(sv);
1126 }
1127} 3215}
1128
1129#if !PERL_MICRO
1130 3216
1131void 3217void
1132ready(self) 3218api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1133 SV * self 3219 PROTOTYPE: $;$
3220 C_ARGS: aTHX_ coro, flags
3221
3222SV *
3223has_cctx (Coro::State coro)
1134 PROTOTYPE: $ 3224 PROTOTYPE: $
1135 CODE: 3225 CODE:
1136 api_ready (self); 3226 /* maybe manage the running flag differently */
1137 3227 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1138#endif 3228 OUTPUT:
3229 RETVAL
1139 3230
1140int 3231int
3232is_traced (Coro::State coro)
3233 PROTOTYPE: $
3234 CODE:
3235 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3236 OUTPUT:
3237 RETVAL
3238
3239UV
3240rss (Coro::State coro)
3241 PROTOTYPE: $
3242 ALIAS:
3243 usecount = 1
3244 CODE:
3245 switch (ix)
3246 {
3247 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3248 case 1: RETVAL = coro->usecount; break;
3249 }
3250 OUTPUT:
3251 RETVAL
3252
3253void
3254force_cctx ()
3255 PROTOTYPE:
3256 CODE:
3257 cctx_current->idle_sp = 0;
3258
3259void
3260swap_defsv (Coro::State self)
3261 PROTOTYPE: $
3262 ALIAS:
3263 swap_defav = 1
3264 CODE:
3265 if (!self->slot)
3266 croak ("cannot swap state with coroutine that has no saved state,");
3267 else
3268 {
3269 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3270 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3271
3272 SV *tmp = *src; *src = *dst; *dst = tmp;
3273 }
3274
3275void
3276cancel (Coro::State self)
3277 CODE:
3278 coro_state_destroy (aTHX_ self);
3279 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3280
3281
3282SV *
3283enable_times (int enabled = enable_times)
3284 CODE:
3285{
3286 RETVAL = boolSV (enable_times);
3287
3288 if (enabled != enable_times)
3289 {
3290 enable_times = enabled;
3291
3292 coro_times_update ();
3293 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3294 }
3295}
3296 OUTPUT:
3297 RETVAL
3298
3299void
3300times (Coro::State self)
3301 PPCODE:
3302{
3303 struct coro *current = SvSTATE (coro_current);
3304
3305 if (expect_false (current == self))
3306 {
3307 coro_times_update ();
3308 coro_times_add (SvSTATE (coro_current));
3309 }
3310
3311 EXTEND (SP, 2);
3312 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3313 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3314
3315 if (expect_false (current == self))
3316 coro_times_sub (SvSTATE (coro_current));
3317}
3318
3319MODULE = Coro::State PACKAGE = Coro
3320
3321BOOT:
3322{
3323 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3324 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3325 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3326 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3327 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3328 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3329 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3330 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3331 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3332
3333 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3334 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3335 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3336
3337 coro_stash = gv_stashpv ("Coro", TRUE);
3338
3339 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3340 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3341 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3342 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3343 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3344 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3345
3346 {
3347 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3348
3349 coroapi.schedule = api_schedule;
3350 coroapi.schedule_to = api_schedule_to;
3351 coroapi.cede = api_cede;
3352 coroapi.cede_notself = api_cede_notself;
3353 coroapi.ready = api_ready;
3354 coroapi.is_ready = api_is_ready;
3355 coroapi.nready = coro_nready;
3356 coroapi.current = coro_current;
3357
3358 /*GCoroAPI = &coroapi;*/
3359 sv_setiv (sv, (IV)&coroapi);
3360 SvREADONLY_on (sv);
3361 }
3362}
3363
3364SV *
3365async (...)
3366 PROTOTYPE: &@
3367 CODE:
3368 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3369 api_ready (RETVAL);
3370 OUTPUT:
3371 RETVAL
3372
3373void
3374terminate (...)
3375 CODE:
3376 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3377
3378void
3379schedule (...)
3380 CODE:
3381 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3382
3383void
3384schedule_to (...)
3385 CODE:
3386 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3387
3388void
3389cede_to (...)
3390 CODE:
3391 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3392
3393void
3394cede (...)
3395 CODE:
3396 CORO_EXECUTE_SLF_XS (slf_init_cede);
3397
3398void
3399cede_notself (...)
3400 CODE:
3401 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3402
3403void
3404_set_current (SV *current)
3405 PROTOTYPE: $
3406 CODE:
3407 SvREFCNT_dec (SvRV (coro_current));
3408 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3409
3410void
3411_set_readyhook (SV *hook)
3412 PROTOTYPE: $
3413 CODE:
3414 SvREFCNT_dec (coro_readyhook);
3415 SvGETMAGIC (hook);
3416 if (SvOK (hook))
3417 {
3418 coro_readyhook = newSVsv (hook);
3419 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3420 }
3421 else
3422 {
3423 coro_readyhook = 0;
3424 CORO_READYHOOK = 0;
3425 }
3426
3427int
3428prio (Coro::State coro, int newprio = 0)
3429 PROTOTYPE: $;$
3430 ALIAS:
3431 nice = 1
3432 CODE:
3433{
3434 RETVAL = coro->prio;
3435
3436 if (items > 1)
3437 {
3438 if (ix)
3439 newprio = coro->prio - newprio;
3440
3441 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3442 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3443
3444 coro->prio = newprio;
3445 }
3446}
3447 OUTPUT:
3448 RETVAL
3449
3450SV *
3451ready (SV *self)
3452 PROTOTYPE: $
3453 CODE:
3454 RETVAL = boolSV (api_ready (aTHX_ self));
3455 OUTPUT:
3456 RETVAL
3457
3458int
1141nready(...) 3459nready (...)
1142 PROTOTYPE: 3460 PROTOTYPE:
1143 CODE: 3461 CODE:
1144 RETVAL = coro_nready; 3462 RETVAL = coro_nready;
1145 OUTPUT: 3463 OUTPUT:
1146 RETVAL 3464 RETVAL
1147 3465
1148void 3466void
1149schedule(...) 3467suspend (Coro::State self)
1150 PROTOTYPE: 3468 PROTOTYPE: $
1151 CODE: 3469 CODE:
1152 api_schedule (); 3470 self->flags |= CF_SUSPENDED;
1153 3471
1154void 3472void
1155cede(...) 3473resume (Coro::State self)
1156 PROTOTYPE: 3474 PROTOTYPE: $
1157 CODE: 3475 CODE:
1158 api_cede (); 3476 self->flags &= ~CF_SUSPENDED;
1159 3477
1160# and these are hacks 3478void
3479_pool_handler (...)
3480 CODE:
3481 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3482
3483void
3484async_pool (SV *cv, ...)
3485 PROTOTYPE: &@
3486 PPCODE:
3487{
3488 HV *hv = (HV *)av_pop (av_async_pool);
3489 AV *av = newAV ();
3490 SV *cb = ST (0);
3491 int i;
3492
3493 av_extend (av, items - 2);
3494 for (i = 1; i < items; ++i)
3495 av_push (av, SvREFCNT_inc_NN (ST (i)));
3496
3497 if ((SV *)hv == &PL_sv_undef)
3498 {
3499 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3500 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3501 SvREFCNT_dec (sv);
3502 }
3503
3504 {
3505 struct coro *coro = SvSTATE_hv (hv);
3506
3507 assert (!coro->invoke_cb);
3508 assert (!coro->invoke_av);
3509 coro->invoke_cb = SvREFCNT_inc (cb);
3510 coro->invoke_av = av;
3511 }
3512
3513 api_ready (aTHX_ (SV *)hv);
3514
3515 if (GIMME_V != G_VOID)
3516 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3517 else
3518 SvREFCNT_dec (hv);
3519}
3520
1161SV * 3521SV *
1162_aio_get_state () 3522rouse_cb ()
3523 PROTOTYPE:
1163 CODE: 3524 CODE:
1164{ 3525 RETVAL = coro_new_rouse_cb (aTHX);
1165 struct {
1166 int errorno;
1167 int laststype;
1168 int laststatval;
1169 Stat_t statcache;
1170 } data;
1171
1172 data.errorno = errno;
1173 data.laststype = PL_laststype;
1174 data.laststatval = PL_laststatval;
1175 data.statcache = PL_statcache;
1176
1177 RETVAL = newSVpvn ((char *)&data, sizeof data);
1178}
1179 OUTPUT: 3526 OUTPUT:
1180 RETVAL 3527 RETVAL
1181 3528
1182void 3529void
1183_aio_set_state (char *data_) 3530rouse_wait (...)
3531 PROTOTYPE: ;$
3532 PPCODE:
3533 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3534
3535void
3536on_enter (SV *block)
3537 ALIAS:
3538 on_leave = 1
1184 PROTOTYPE: $ 3539 PROTOTYPE: &
1185 CODE: 3540 CODE:
1186{ 3541{
1187 struct { 3542 struct coro *coro = SvSTATE_current;
3543 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3544
3545 block = s_get_cv_croak (block);
3546
3547 if (!*avp)
3548 *avp = newAV ();
3549
3550 av_push (*avp, SvREFCNT_inc (block));
3551
3552 if (!ix)
3553 on_enterleave_call (aTHX_ block);
3554
3555 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3556 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3557 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3558}
3559
3560
3561MODULE = Coro::State PACKAGE = PerlIO::cede
3562
3563BOOT:
3564 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3565
3566
3567MODULE = Coro::State PACKAGE = Coro::Semaphore
3568
3569SV *
3570new (SV *klass, SV *count = 0)
3571 CODE:
3572{
3573 int semcnt = 1;
3574
3575 if (count)
3576 {
3577 SvGETMAGIC (count);
3578
3579 if (SvOK (count))
3580 semcnt = SvIV (count);
3581 }
3582
3583 RETVAL = sv_bless (
3584 coro_waitarray_new (aTHX_ semcnt),
3585 GvSTASH (CvGV (cv))
3586 );
3587}
3588 OUTPUT:
3589 RETVAL
3590
3591# helper for Coro::Channel and others
3592SV *
3593_alloc (int count)
3594 CODE:
3595 RETVAL = coro_waitarray_new (aTHX_ count);
3596 OUTPUT:
3597 RETVAL
3598
3599SV *
3600count (SV *self)
3601 CODE:
3602 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3603 OUTPUT:
3604 RETVAL
3605
3606void
3607up (SV *self, int adjust = 1)
3608 ALIAS:
3609 adjust = 1
3610 CODE:
3611 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3612
3613void
3614down (...)
3615 CODE:
3616 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3617
3618void
3619wait (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3622
3623void
3624try (SV *self)
3625 PPCODE:
3626{
3627 AV *av = (AV *)SvRV (self);
3628 SV *count_sv = AvARRAY (av)[0];
3629 IV count = SvIVX (count_sv);
3630
3631 if (count > 0)
3632 {
3633 --count;
3634 SvIVX (count_sv) = count;
3635 XSRETURN_YES;
3636 }
3637 else
3638 XSRETURN_NO;
3639}
3640
3641void
3642waiters (SV *self)
3643 PPCODE:
3644{
3645 AV *av = (AV *)SvRV (self);
3646 int wcount = AvFILLp (av) + 1 - 1;
3647
3648 if (GIMME_V == G_SCALAR)
3649 XPUSHs (sv_2mortal (newSViv (wcount)));
3650 else
3651 {
1188 int errorno; 3652 int i;
1189 int laststype; 3653 EXTEND (SP, wcount);
1190 int laststatval; 3654 for (i = 1; i <= wcount; ++i)
1191 Stat_t statcache; 3655 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1192 } *data = (void *)data_; 3656 }
1193
1194 errno = data->errorno;
1195 PL_laststype = data->laststype;
1196 PL_laststatval = data->laststatval;
1197 PL_statcache = data->statcache;
1198} 3657}
3658
3659MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3660
3661void
3662_may_delete (SV *sem, int count, int extra_refs)
3663 PPCODE:
3664{
3665 AV *av = (AV *)SvRV (sem);
3666
3667 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3668 && AvFILLp (av) == 0 /* no waiters, just count */
3669 && SvIV (AvARRAY (av)[0]) == count)
3670 XSRETURN_YES;
3671
3672 XSRETURN_NO;
3673}
3674
3675MODULE = Coro::State PACKAGE = Coro::Signal
3676
3677SV *
3678new (SV *klass)
3679 CODE:
3680 RETVAL = sv_bless (
3681 coro_waitarray_new (aTHX_ 0),
3682 GvSTASH (CvGV (cv))
3683 );
3684 OUTPUT:
3685 RETVAL
3686
3687void
3688wait (...)
3689 CODE:
3690 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3691
3692void
3693broadcast (SV *self)
3694 CODE:
3695{
3696 AV *av = (AV *)SvRV (self);
3697 coro_signal_wake (aTHX_ av, AvFILLp (av));
3698}
3699
3700void
3701send (SV *self)
3702 CODE:
3703{
3704 AV *av = (AV *)SvRV (self);
3705
3706 if (AvFILLp (av))
3707 coro_signal_wake (aTHX_ av, 1);
3708 else
3709 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3710}
3711
3712IV
3713awaited (SV *self)
3714 CODE:
3715 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3716 OUTPUT:
3717 RETVAL
3718
3719
3720MODULE = Coro::State PACKAGE = Coro::AnyEvent
3721
3722BOOT:
3723 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3724
3725void
3726_schedule (...)
3727 CODE:
3728{
3729 static int incede;
3730
3731 api_cede_notself (aTHX);
3732
3733 ++incede;
3734 while (coro_nready >= incede && api_cede (aTHX))
3735 ;
3736
3737 sv_setsv (sv_activity, &PL_sv_undef);
3738 if (coro_nready >= incede)
3739 {
3740 PUSHMARK (SP);
3741 PUTBACK;
3742 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3743 }
3744
3745 --incede;
3746}
3747
3748
3749MODULE = Coro::State PACKAGE = Coro::AIO
3750
3751void
3752_register (char *target, char *proto, SV *req)
3753 CODE:
3754{
3755 SV *req_cv = s_get_cv_croak (req);
3756 /* newXSproto doesn't return the CV on 5.8 */
3757 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3758 sv_setpv ((SV *)slf_cv, proto);
3759 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3760}
3761
3762MODULE = Coro::State PACKAGE = Coro::Select
3763
3764void
3765patch_pp_sselect ()
3766 CODE:
3767 if (!coro_old_pp_sselect)
3768 {
3769 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3770 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3771 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3772 }
3773
3774void
3775unpatch_pp_sselect ()
3776 CODE:
3777 if (coro_old_pp_sselect)
3778 {
3779 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3780 coro_old_pp_sselect = 0;
3781 }
3782
3783

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