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Comparing Coro/Coro/State.xs (file contents):
Revision 1.185 by root, Thu Oct 4 19:35:08 2007 UTC vs.
Revision 1.459 by root, Fri Jun 17 05:00:19 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
11#include <stdio.h> 23#include <stdio.h>
12#include <errno.h> 24#include <errno.h>
13#include <assert.h> 25#include <assert.h>
14 26
15#ifdef HAVE_MMAP 27#ifndef SvREFCNT_dec_NN
16# include <unistd.h> 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
24# endif 47# endif
25# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
29static long pagesize; 52# define PadMAX AvFILLp
30# else 53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
33#else 74#else
34# define PAGESIZE 0 75# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 76#endif
44 77
45/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
47 80
48#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 82# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif 83#endif
87 84
88/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 88#endif
92 89
93/* The next macros try to return the current stack pointer, in an as 90/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 91 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3 92#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
103#else 95#else
104# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
106#endif 98#endif
107 99
108#define NOINLINE attribute ((noinline)) 100#define IN_DESTRUCT PL_dirty
109 101
110#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
111 104
112#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 106# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 108# endif
109#endif
120 110
121/* helper storage struct for Coro::AIO */ 111#ifdef __linux
122struct io_state 112# include <time.h> /* for timespec */
123{ 113# include <syscall.h> /* for SYS_* */
124 int errorno; 114# ifdef SYS_clock_gettime
125 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 118# endif
119#endif
129 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 130static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136 136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
137static GV *irsgv; /* $/ */ 141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
138 145
139/* async_pool helper stuff */ 146/* async_pool helper stuff */
140static SV *sv_pool_rss; 147static SV *sv_pool_rss;
141static SV *sv_pool_size; 148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
142static AV *av_async_pool; 150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
143 162
144static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
146 165
147enum { 166enum
167{
148 CC_MAPPED = 0x01, 168 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */ 169 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04, 170 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */ 171 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */ 172 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154}; 174};
155 175
156/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx { 177typedef struct coro_cctx
178{
158 struct coro_cctx *next; 179 struct coro_cctx *next;
159 180
160 /* the stack */ 181 /* the stack */
161 void *sptr; 182 struct coro_stack stack;
162 size_t ssize;
163 183
164 /* cpu state */ 184 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
167 JMPENV *top_env; 189 JMPENV *top_env;
168 coro_context cctx; 190 coro_context cctx;
169 191
192 U32 gen;
170#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
171 int valgrind_id; 194 int valgrind_id;
172#endif 195#endif
173 unsigned char flags; 196 unsigned char flags;
174} coro_cctx; 197} coro_cctx;
175 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
176enum { 205enum
206{
177 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
181}; 213};
182 214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218 #define VARx(name,expr,type) type name;
219 #include "state.h"
220} perl_slots;
221
222/* how many context stack entries do we need for perl_slots */
223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
224
183/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
184struct coro { 226struct coro
227{
185 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
186 coro_cctx *cctx; 229 coro_cctx *cctx;
187 230
231 /* ready queue */
232 struct coro *next_ready;
233
234 /* state data */
235 struct CoroSLF slf_frame; /* saved slf frame */
236 AV *mainstack;
237 perl_slots *slot; /* basically the saved sp */
238
239 CV *startcv; /* the CV to execute */
188 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */ 241 int flags; /* CF_ flags */
192 242 HV *hv; /* the perl hash associated with this coro, if any */
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204 243
205 /* statistics */ 244 /* statistics */
206 int usecount; /* number of transfers to this coro */ 245 int usecount; /* number of transfers to this coro */
207 246
208 /* coro process data */ 247 /* coro process data */
209 int prio; 248 int prio;
210 //SV *throw; 249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
211 253
212 /* async_pool */ 254 /* async_pool */
213 SV *saved_deffh; 255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
214 268
215 /* linked list */ 269 /* linked list */
216 struct coro *next, *prev; 270 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
218}; 271};
219 272
220typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
221typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
222 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
223/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
224 282
225#define PRIO_MAX 3 283#define CORO_PRIO_MAX 3
226#define PRIO_HIGH 1 284#define CORO_PRIO_HIGH 1
227#define PRIO_NORMAL 0 285#define CORO_PRIO_NORMAL 0
228#define PRIO_LOW -1 286#define CORO_PRIO_LOW -1
229#define PRIO_IDLE -3 287#define CORO_PRIO_IDLE -3
230#define PRIO_MIN -4 288#define CORO_PRIO_MIN -4
231 289
232/* for Coro.pm */ 290/* for Coro.pm */
233static SV *coro_current; 291static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static SV *coro_readyhook;
235static int coro_nready; 293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
236static struct coro *coro_first; 295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
329{
330 dSP;
331 PUSHMARK (SP - 4); /* fake argument list */
332 XPUSHs (coro_select_select);
333 PUTBACK;
334
335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
336 PL_op->op_flags |= OPf_STACKED;
337 PL_op->op_private = 0;
338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
376 SV **svp;
377
378 require_pv ("Time/HiRes.pm");
379
380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
381
382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
237 392
238/** lowlevel stuff **********************************************************/ 393/** lowlevel stuff **********************************************************/
239 394
240static AV * 395static SV * ecb_noinline
396coro_get_sv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_sv (name, create);
401#endif
402 return get_sv (name, create);
403}
404
405static AV * ecb_noinline
406coro_get_av (pTHX_ const char *name, int create)
407{
408#if PERL_VERSION_ATLEAST (5,10,0)
409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
410 get_av (name, create);
411#endif
412 return get_av (name, create);
413}
414
415static HV * ecb_noinline
416coro_get_hv (pTHX_ const char *name, int create)
417{
418#if PERL_VERSION_ATLEAST (5,10,0)
419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
420 get_hv (name, create);
421#endif
422 return get_hv (name, create);
423}
424
425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
241coro_clone_padlist (pTHX_ CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
242{ 532{
243 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
245 538
246 newpadlist = newAV (); 539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
247 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif 568#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist);
255 569
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
257 av_store (newpadlist, 1, (SV *)newpad); 571 PadlistMAX (newpadlist) = 1;
572
573 padnames = PadlistNAMES (padlist);
574 ++PadnamelistREFCNT (padnames);
575 PadlistNAMES (newpadlist) = padnames;
576
577 PadlistARRAY (newpadlist)[1] = newpad;
258 578
259 return newpadlist; 579 return newpadlist;
260} 580}
261 581
262static void 582ecb_inline void
263free_padlist (pTHX_ AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
264{ 584{
265 /* may be during global destruction */ 585 /* may be during global destruction */
266 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
267 { 587 {
268 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
269 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
270 { 591 {
271 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
272 if (svp) 595 if (pad)
273 { 596 {
274 SV *sv; 597 I32 j = PadMAX (pad);
275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
276 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
277 601
602 PadMAX (pad) = -1;
278 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
279 } 604 }
280 } 605 }
281 606
607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
608
609#if NEWPADAPI
610 Safefree (PadlistARRAY (padlist));
611 Safefree (padlist);
612#else
613 AvFILLp (padlist) = -1;
614 AvREAL_off (padlist);
282 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
283 } 617 }
284} 618}
285 619
286static int 620static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{ 622{
289 AV *padlist; 623 PADLIST *padlist;
290 AV *av = (AV *)mg->mg_obj; 624 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
625 size_t len = *(size_t *)mg->mg_ptr;
291 626
292 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
294 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
295
296 SvREFCNT_dec (av);
297 633
298 return 0; 634 return 0;
299} 635}
300 636
301#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
302 638 0, 0, 0, 0,
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
304 640};
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337 641
338/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
339static void 643ecb_inline void
340get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
341{ 645{
342 MAGIC *mg = CORO_MAGIC (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
343 AV *av; 647 size_t *lenp;
344 648
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
347 else 651 else
348 { 652 {
349#if CORO_PREFER_PERL_FUNCTIONS 653#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
351 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
352 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
355#else 660#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
357#endif 662#endif
358 } 663 }
359} 664}
360 665
361static void 666ecb_inline void
362put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
363{ 668{
364 MAGIC *mg = CORO_MAGIC (cv); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
365 AV *av;
366 670
367 if (!mg) 671 if (ecb_expect_false (!mg))
368 {
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 } 672 {
673 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
674 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
675 mg->mg_len = 1; /* so mg_free frees mg_ptr */
676 }
677 else
678 Renew (mg->mg_ptr,
679 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
680 char);
374 681
375 av = (AV *)mg->mg_obj; 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
376
377 if (AvFILLp (av) >= AvMAX (av))
378 av_extend (av, AvMAX (av) + 1);
379
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381} 683}
382 684
383/** load & save, init *******************************************************/ 685/** load & save, init *******************************************************/
384 686
687ecb_inline void
688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
692
693 /* swap sv_any */
694 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
695
696 /* swap sv_flags */
697 SvFLAGS (&tmp) = SvFLAGS (a);
698 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
699 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
700
701#if PERL_VERSION_ATLEAST (5,10,0)
702 /* perl 5.10 and later complicates this _quite_ a bit, but it also
703 * is much faster, so no quarrels here. alternatively, we could
704 * sv_upgrade to avoid this.
705 */
706 {
707 /* swap sv_u */
708 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
709
710 /* if SvANY points to the head, we need to adjust the pointers,
711 * as the pointer for a still points to b, and maybe vice versa.
712 */
713 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
714 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
715 svany_in_head_set |= 1 << SVt_NV;
716 #endif
717
718 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
719
720 if (svany_in_head (SvTYPE (a)))
721 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
722
723 if (svany_in_head (SvTYPE (b)))
724 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
725 }
726#endif
727}
728
729/* swap sv heads, at least logically */
730static void
731swap_svs_enter (pTHX_ Coro__State c)
732{
733 int i;
734
735 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
736 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
737}
738
739static void
740swap_svs_leave (pTHX_ Coro__State c)
741{
742 int i;
743
744 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
745 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
746}
747
748#define SWAP_SVS_ENTER(coro) \
749 if (ecb_expect_false ((coro)->swap_sv)) \
750 swap_svs_enter (aTHX_ (coro))
751
752#define SWAP_SVS_LEAVE(coro) \
753 if (ecb_expect_false ((coro)->swap_sv)) \
754 swap_svs_leave (aTHX_ (coro))
755
756static void
757on_enterleave_call (pTHX_ SV *cb);
758
385static void 759static void
386load_perl (pTHX_ Coro__State c) 760load_perl (pTHX_ Coro__State c)
387{ 761{
388#define VAR(name,type) PL_ ## name = c->name; 762 perl_slots *slot = c->slot;
763 c->slot = 0;
764
765 PL_mainstack = c->mainstack;
766
767#if CORO_JIT
768 load_perl_slots (slot);
769#else
770 #define VARx(name,expr,type) expr = slot->name;
389# include "state.h" 771 #include "state.h"
390#undef VAR 772#endif
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 GvSV (irsgv) = c->irssv_sv;
396 773
397 { 774 {
398 dSP; 775 dSP;
776
399 CV *cv; 777 CV *cv;
400 778
401 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
402 while ((cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
403 { 781 {
404 put_padlist (aTHX_ cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
405 CvDEPTH (cv) = PTR2IV (POPs); 783 CvDEPTH (cv) = PTR2IV (POPs);
406 CvPADLIST (cv) = (AV *)POPs; 784 CvPADLIST (cv) = (PADLIST *)POPs;
407 } 785 }
408 786
409 PUTBACK; 787 PUTBACK;
410 } 788 }
789
790 slf_frame = c->slf_frame;
791 CORO_THROW = c->except;
792
793 if (ecb_expect_false (enable_times))
794 {
795 if (ecb_expect_false (!times_valid))
796 coro_times_update ();
797
798 coro_times_sub (c);
799 }
800
801 if (ecb_expect_false (c->on_enter))
802 {
803 int i;
804
805 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
806 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
807 }
808
809 if (ecb_expect_false (c->on_enter_xs))
810 {
811 int i;
812
813 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
815 }
816
817 SWAP_SVS_ENTER (c);
411} 818}
412 819
413static void 820static void
414save_perl (pTHX_ Coro__State c) 821save_perl (pTHX_ Coro__State c)
415{ 822{
823 SWAP_SVS_LEAVE (c);
824
825 if (ecb_expect_false (c->on_leave_xs))
826 {
827 int i;
828
829 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
830 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
831 }
832
833 if (ecb_expect_false (c->on_leave))
834 {
835 int i;
836
837 for (i = AvFILLp (c->on_leave); i >= 0; --i)
838 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
839 }
840
841 times_valid = 0;
842
843 if (ecb_expect_false (enable_times))
844 {
845 coro_times_update (); times_valid = 1;
846 coro_times_add (c);
847 }
848
849 c->except = CORO_THROW;
850 c->slf_frame = slf_frame;
851
416 { 852 {
417 dSP; 853 dSP;
418 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
419 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
420 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
426 862
427 XPUSHs (Nullsv); 863 XPUSHs (Nullsv);
428 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
429 for (;;) 865 for (;;)
430 { 866 {
431 while (cxix >= 0) 867 while (ecb_expect_true (cxix >= 0))
432 { 868 {
433 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
434 870
435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
436 { 872 {
437 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
438 874
439 if (CvDEPTH (cv)) 875 if (ecb_expect_true (CvDEPTH (cv)))
440 { 876 {
441 EXTEND (SP, 3); 877 EXTEND (SP, 3);
442 PUSHs ((SV *)CvPADLIST (cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
444 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
445 881
446 CvDEPTH (cv) = 0; 882 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv); 883 get_padlist (aTHX_ cv);
448 } 884 }
449 } 885 }
450 } 886 }
451 887
452 if (top_si->si_type == PERLSI_MAIN) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
453 break; 889 break;
454 890
455 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
456 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
457 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
458 } 894 }
459 895
460 PUTBACK; 896 PUTBACK;
461 } 897 }
462 898
463 c->defav = GvAV (PL_defgv); 899 /* allocate some space on the context stack for our purposes */
464 c->defsv = DEFSV; 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
465 c->errsv = ERRSV; 901 {
466 c->irssv_sv = GvSV (irsgv); 902 unsigned int i;
467 903
468#define VAR(name,type)c->name = PL_ ## name; 904 for (i = 0; i < SLOT_COUNT; ++i)
905 CXINC;
906
907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
908 }
909
910 c->mainstack = PL_mainstack;
911
912 {
913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
914
915#if CORO_JIT
916 save_perl_slots (slot);
917#else
918 #define VARx(name,expr,type) slot->name = expr;
469# include "state.h" 919 #include "state.h"
470#undef VAR 920#endif
921 }
471} 922}
472 923
473/* 924/*
474 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
475 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
478 */ 929 */
479#if CORO_PREFER_PERL_FUNCTIONS 930#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks 931# define coro_init_stacks(thx) init_stacks ()
481#else 932#else
482static void 933static void
483coro_init_stacks (pTHX) 934coro_init_stacks (pTHX)
484{ 935{
485 PL_curstackinfo = new_stackinfo(64, 6); 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
486 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489 940
490 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base; 942 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 943 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493 944
494 New(50,PL_tmps_stack,64,SV*); 945 New(50,PL_tmps_stack,32,SV*);
495 PL_tmps_floor = -1; 946 PL_tmps_floor = -1;
496 PL_tmps_ix = -1; 947 PL_tmps_ix = -1;
497 PL_tmps_max = 64; 948 PL_tmps_max = 32;
498 949
499 New(54,PL_markstack,16,I32); 950 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack; 951 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16; 952 PL_markstack_max = PL_markstack + 16;
502 953
503#ifdef SET_MARK_OFFSET 954#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET; 955 SET_MARK_OFFSET;
505#endif 956#endif
506 957
507 New(54,PL_scopestack,16,I32); 958 New(54,PL_scopestack,8,I32);
508 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16; 960 PL_scopestack_max = 8;
961#if HAS_SCOPESTACK_NAME
962 New(54,PL_scopestack_name,8,const char*);
963#endif
510 964
511 New(54,PL_savestack,64,ANY); 965 New(54,PL_savestack,24,ANY);
512 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
513 PL_savestack_max = 64; 967 PL_savestack_max = 24;
514 968
515#if !PERL_VERSION_ATLEAST (5,9,0) 969#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,4,OP*); 970 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 971 PL_retstack_ix = 0;
518 PL_retstack_max = 4; 972 PL_retstack_max = 4;
519#endif 973#endif
520} 974}
… …
522 976
523/* 977/*
524 * destroy the stacks, the callchain etc... 978 * destroy the stacks, the callchain etc...
525 */ 979 */
526static void 980static void
527coro_destroy_stacks (pTHX) 981coro_destruct_stacks (pTHX)
528{ 982{
529 while (PL_curstackinfo->si_next) 983 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next; 984 PL_curstackinfo = PL_curstackinfo->si_next;
531 985
532 while (PL_curstackinfo) 986 while (PL_curstackinfo)
… …
542 } 996 }
543 997
544 Safefree (PL_tmps_stack); 998 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 999 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 1000 Safefree (PL_scopestack);
1001#if HAS_SCOPESTACK_NAME
1002 Safefree (PL_scopestack_name);
1003#endif
547 Safefree (PL_savestack); 1004 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 1005#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 1006 Safefree (PL_retstack);
550#endif 1007#endif
551} 1008}
1009
1010#define CORO_RSS \
1011 rss += sizeof (SYM (curstackinfo)); \
1012 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1013 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1014 rss += SYM (tmps_max) * sizeof (SV *); \
1015 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1016 rss += SYM (scopestack_max) * sizeof (I32); \
1017 rss += SYM (savestack_max) * sizeof (ANY);
552 1018
553static size_t 1019static size_t
554coro_rss (pTHX_ struct coro *coro) 1020coro_rss (pTHX_ struct coro *coro)
555{ 1021{
556 size_t rss = sizeof (*coro); 1022 size_t rss = sizeof (*coro);
557 1023
558 if (coro->mainstack) 1024 if (coro->mainstack)
559 { 1025 {
560 if (coro->flags & CF_RUNNING) 1026 if (coro->flags & CF_RUNNING)
561 { 1027 {
562 #define VAR(name,type)coro->name = PL_ ## name; 1028 #define SYM(sym) PL_ ## sym
563 # include "state.h" 1029 CORO_RSS;
564 #undef VAR 1030 #undef SYM
565 } 1031 }
566 1032 else
567 rss += sizeof (coro->curstackinfo); 1033 {
568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 1034 #define SYM(sym) coro->slot->sym
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1035 CORO_RSS;
570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 1036 #undef SYM
571 rss += coro->tmps_max * sizeof (SV *); 1037 }
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575
576#if !PERL_VERSION_ATLEAST (5,9,0)
577 rss += coro->retstack_max * sizeof (OP *);
578#endif
579 } 1038 }
580 1039
581 return rss; 1040 return rss;
582} 1041}
583 1042
584/** coroutine stack handling ************************************************/ 1043/** coroutine stack handling ************************************************/
585 1044
1045static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1046static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1047static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1048
1049/* apparently < 5.8.8 */
1050#ifndef MgPV_nolen_const
1051#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1052 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1053 (const char*)(mg)->mg_ptr)
1054#endif
1055
1056/*
1057 * This overrides the default magic get method of %SIG elements.
1058 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1059 * and instead of trying to save and restore the hash elements (extremely slow),
1060 * we just provide our own readback here.
1061 */
1062static int ecb_cold
1063coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1064{
1065 const char *s = MgPV_nolen_const (mg);
1066
1067 if (*s == '_')
1068 {
1069 SV **svp = 0;
1070
1071 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1072 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1073
1074 if (svp)
1075 {
1076 SV *ssv;
1077
1078 if (!*svp)
1079 ssv = &PL_sv_undef;
1080 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1081 ssv = sv_2mortal (newRV_inc (*svp));
1082 else
1083 ssv = *svp;
1084
1085 sv_setsv (sv, ssv);
1086 return 0;
1087 }
1088 }
1089
1090 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1091}
1092
1093static int ecb_cold
1094coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1095{
1096 const char *s = MgPV_nolen_const (mg);
1097
1098 if (*s == '_')
1099 {
1100 SV **svp = 0;
1101
1102 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1103 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1104
1105 if (svp)
1106 {
1107 SV *old = *svp;
1108 *svp = 0;
1109 SvREFCNT_dec (old);
1110 return 0;
1111 }
1112 }
1113
1114 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1115}
1116
1117static int ecb_cold
1118coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 const char *s = MgPV_nolen_const (mg);
1121
1122 if (*s == '_')
1123 {
1124 SV **svp = 0;
1125
1126 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1127 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1128
1129 if (svp)
1130 {
1131 SV *old = *svp;
1132 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1133 SvREFCNT_dec (old);
1134 return 0;
1135 }
1136 }
1137
1138 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1139}
1140
1141static void
1142prepare_nop (pTHX_ struct coro_transfer_args *ta)
1143{
1144 /* kind of mega-hacky, but works */
1145 ta->next = ta->prev = (struct coro *)ta;
1146}
1147
586static void 1148static int
1149slf_check_nop (pTHX_ struct CoroSLF *frame)
1150{
1151 return 0;
1152}
1153
1154static int
1155slf_check_repeat (pTHX_ struct CoroSLF *frame)
1156{
1157 return 1;
1158}
1159
1160static UNOP init_perl_op;
1161
1162ecb_noinline static void /* noinline to keep it out of the transfer fast path */
587coro_setup (pTHX_ struct coro *coro) 1163init_perl (pTHX_ struct coro *coro)
588{ 1164{
589 /* 1165 /*
590 * emulate part of the perl startup here. 1166 * emulate part of the perl startup here.
591 */ 1167 */
592 coro_init_stacks (aTHX); 1168 coro_init_stacks (aTHX);
593 1169
594 PL_runops = RUNOPS_DEFAULT; 1170 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 1171 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 1172 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 1173 PL_comppad = 0;
1174 PL_comppad_name = 0;
1175 PL_comppad_name_fill = 0;
1176 PL_comppad_name_floor = 0;
598 PL_curpm = 0; 1177 PL_curpm = 0;
1178 PL_curpad = 0;
599 PL_localizing = 0; 1179 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0; 1180 PL_restartop = 0;
602 1181#if PERL_VERSION_ATLEAST (5,10,0)
1182 PL_parser = 0;
1183#endif
1184 PL_hints = 0;
1185
1186 /* recreate the die/warn hooks */
1187 PL_diehook = SvREFCNT_inc (rv_diehook);
1188 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1189
603 GvSV (PL_defgv) = NEWSV (0, 0); 1190 GvSV (PL_defgv) = newSV (0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0; 1191 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0); 1192 GvSV (PL_errgv) = newSV (0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1193 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1194 GvHV (PL_hintgv) = newHV ();
1195#if PERL_VERSION_ATLEAST (5,10,0)
1196 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1197#endif
607 PL_rs = newSVsv (GvSV (irsgv)); 1198 PL_rs = newSVsv (GvSV (irsgv));
608 1199 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
609 {
610 IO *io = newIO ();
611 PL_defoutgv = newGVgen ("Coro");
612 GvIOp(PL_defoutgv) = io;
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 }
617 1200
618 { 1201 {
619 dSP; 1202 dSP;
620 LOGOP myop; 1203 UNOP myop;
621 1204
622 Zero (&myop, 1, LOGOP); 1205 Zero (&myop, 1, UNOP);
623 myop.op_next = Nullop; 1206 myop.op_next = Nullop;
1207 myop.op_type = OP_ENTERSUB;
624 myop.op_flags = OPf_WANT_VOID; 1208 myop.op_flags = OPf_WANT_VOID;
625 1209
626 PUSHMARK (SP); 1210 PUSHMARK (SP);
627 XPUSHs (av_shift (GvAV (PL_defgv))); 1211 PUSHs ((SV *)coro->startcv);
628 PUTBACK; 1212 PUTBACK;
629 PL_op = (OP *)&myop; 1213 PL_op = (OP *)&myop;
630 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1214 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631 SPAGAIN;
632 } 1215 }
633 1216
634 ENTER; /* necessary e.g. for dounwind */ 1217 /* this newly created coroutine might be run on an existing cctx which most
635} 1218 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1219 */
1220 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1221 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1222 slf_frame.destroy = 0;
636 1223
1224 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1225 init_perl_op.op_next = PL_op;
1226 init_perl_op.op_type = OP_ENTERSUB;
1227 init_perl_op.op_ppaddr = pp_slf;
1228 /* no flags etc. required, as an init function won't be called */
1229
1230 PL_op = (OP *)&init_perl_op;
1231
1232 /* copy throw, in case it was set before init_perl */
1233 CORO_THROW = coro->except;
1234
1235 SWAP_SVS_ENTER (coro);
1236
1237 if (ecb_expect_false (enable_times))
1238 {
1239 coro_times_update ();
1240 coro_times_sub (coro);
1241 }
1242}
1243
637static void 1244static void
638coro_destroy (pTHX_ struct coro *coro) 1245coro_unwind_stacks (pTHX)
639{ 1246{
640 if (!IN_DESTRUCT) 1247 if (!IN_DESTRUCT)
641 { 1248 {
642 /* restore all saved variables and stuff */ 1249 /* restore all saved variables and stuff */
643 LEAVE_SCOPE (0); 1250 LEAVE_SCOPE (0);
… …
651 POPSTACK_TO (PL_mainstack); 1258 POPSTACK_TO (PL_mainstack);
652 1259
653 /* unwind main stack */ 1260 /* unwind main stack */
654 dounwind (-1); 1261 dounwind (-1);
655 } 1262 }
1263}
656 1264
657 SvREFCNT_dec (GvSV (PL_defgv)); 1265static void
658 SvREFCNT_dec (GvAV (PL_defgv)); 1266destroy_perl (pTHX_ struct coro *coro)
659 SvREFCNT_dec (GvSV (PL_errgv)); 1267{
660 SvREFCNT_dec (PL_defoutgv); 1268 SV *svf [9];
661 SvREFCNT_dec (PL_rs);
662 SvREFCNT_dec (GvSV (irsgv));
663 1269
1270 {
1271 SV *old_current = SvRV (coro_current);
1272 struct coro *current = SvSTATE (old_current);
1273
1274 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1275
1276 save_perl (aTHX_ current);
1277
1278 /* this will cause transfer_check to croak on block*/
1279 SvRV_set (coro_current, (SV *)coro->hv);
1280
1281 load_perl (aTHX_ coro);
1282
1283 /* restore swapped sv's */
1284 SWAP_SVS_LEAVE (coro);
1285
1286 coro_unwind_stacks (aTHX);
1287
1288 coro_destruct_stacks (aTHX);
1289
1290 /* now save some sv's to be free'd later */
1291 svf [0] = GvSV (PL_defgv);
1292 svf [1] = (SV *)GvAV (PL_defgv);
1293 svf [2] = GvSV (PL_errgv);
1294 svf [3] = (SV *)PL_defoutgv;
1295 svf [4] = PL_rs;
1296 svf [5] = GvSV (irsgv);
1297 svf [6] = (SV *)GvHV (PL_hintgv);
1298 svf [7] = PL_diehook;
1299 svf [8] = PL_warnhook;
1300 assert (9 == sizeof (svf) / sizeof (*svf));
1301
1302 SvRV_set (coro_current, old_current);
1303
1304 load_perl (aTHX_ current);
1305 }
1306
1307 {
1308 unsigned int i;
1309
1310 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1311 SvREFCNT_dec (svf [i]);
1312
664 SvREFCNT_dec (coro->saved_deffh); 1313 SvREFCNT_dec (coro->saved_deffh);
665 //SvREFCNT_dec (coro->throw); 1314 SvREFCNT_dec (coro->rouse_cb);
666 1315 SvREFCNT_dec (coro->invoke_cb);
667 coro_destroy_stacks (aTHX); 1316 SvREFCNT_dec (coro->invoke_av);
1317 SvREFCNT_dec (coro->on_enter_xs);
1318 SvREFCNT_dec (coro->on_leave_xs);
1319 }
668} 1320}
669 1321
670static void 1322ecb_inline void
671free_coro_mortal (pTHX) 1323free_coro_mortal (pTHX)
672{ 1324{
673 if (coro_mortal) 1325 if (ecb_expect_true (coro_mortal))
674 { 1326 {
675 SvREFCNT_dec (coro_mortal); 1327 SvREFCNT_dec ((SV *)coro_mortal);
676 coro_mortal = 0; 1328 coro_mortal = 0;
677 } 1329 }
678} 1330}
679 1331
680static int 1332static int
681runops_trace (pTHX) 1333runops_trace (pTHX)
682{ 1334{
683 COP *oldcop = 0; 1335 COP *oldcop = 0;
684 int oldcxix = -2; 1336 int oldcxix = -2;
685 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
686 coro_cctx *cctx = coro->cctx;
687 1337
688 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1338 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
689 { 1339 {
690 PERL_ASYNC_CHECK (); 1340 PERL_ASYNC_CHECK ();
691 1341
692 if (cctx->flags & CC_TRACE_ALL) 1342 if (cctx_current->flags & CC_TRACE_ALL)
693 { 1343 {
694 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1344 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
695 { 1345 {
696 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1346 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 SV **bot, **top; 1347 SV **bot, **top;
698 AV *av = newAV (); /* return values */ 1348 AV *av = newAV (); /* return values */
699 SV **cb; 1349 SV **cb;
… …
707 bot = PL_stack_base + cx->blk_oldsp + 1; 1357 bot = PL_stack_base + cx->blk_oldsp + 1;
708 top = cx->blk_gimme == G_ARRAY ? SP + 1 1358 top = cx->blk_gimme == G_ARRAY ? SP + 1
709 : cx->blk_gimme == G_SCALAR ? bot + 1 1359 : cx->blk_gimme == G_SCALAR ? bot + 1
710 : bot; 1360 : bot;
711 1361
1362 av_extend (av, top - bot);
712 while (bot < top) 1363 while (bot < top)
713 av_push (av, SvREFCNT_inc (*bot++)); 1364 av_push (av, SvREFCNT_inc_NN (*bot++));
714 1365
715 PL_runops = RUNOPS_DEFAULT; 1366 PL_runops = RUNOPS_DEFAULT;
716 ENTER; 1367 ENTER;
717 SAVETMPS; 1368 SAVETMPS;
718 EXTEND (SP, 3); 1369 EXTEND (SP, 3);
… …
735 1386
736 if (PL_curcop != &PL_compiling) 1387 if (PL_curcop != &PL_compiling)
737 { 1388 {
738 SV **cb; 1389 SV **cb;
739 1390
740 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1391 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
741 { 1392 {
742 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1393 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
743 1394
744 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1395 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
745 { 1396 {
746 runops_proc_t old_runops = PL_runops;
747 dSP; 1397 dSP;
748 GV *gv = CvGV (cx->blk_sub.cv); 1398 GV *gv = CvGV (cx->blk_sub.cv);
749 SV *fullname = sv_2mortal (newSV (0)); 1399 SV *fullname = sv_2mortal (newSV (0));
750 1400
751 if (isGV (gv)) 1401 if (isGV (gv))
… …
756 SAVETMPS; 1406 SAVETMPS;
757 EXTEND (SP, 3); 1407 EXTEND (SP, 3);
758 PUSHMARK (SP); 1408 PUSHMARK (SP);
759 PUSHs (&PL_sv_yes); 1409 PUSHs (&PL_sv_yes);
760 PUSHs (fullname); 1410 PUSHs (fullname);
761 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1411 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
762 PUTBACK; 1412 PUTBACK;
763 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1413 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
764 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1414 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
765 SPAGAIN; 1415 SPAGAIN;
766 FREETMPS; 1416 FREETMPS;
… …
769 } 1419 }
770 1420
771 oldcxix = cxstack_ix; 1421 oldcxix = cxstack_ix;
772 } 1422 }
773 1423
774 if (cctx->flags & CC_TRACE_LINE) 1424 if (cctx_current->flags & CC_TRACE_LINE)
775 { 1425 {
776 dSP; 1426 dSP;
777 1427
778 PL_runops = RUNOPS_DEFAULT; 1428 PL_runops = RUNOPS_DEFAULT;
779 ENTER; 1429 ENTER;
… …
798 1448
799 TAINT_NOT; 1449 TAINT_NOT;
800 return 0; 1450 return 0;
801} 1451}
802 1452
803/* inject a fake call to Coro::State::_cctx_init into the execution */ 1453static struct CoroSLF cctx_ssl_frame;
804/* _cctx_init should be careful, as it could be called at almost any time */
805/* during execution of a perl program */
806static void NOINLINE
807prepare_cctx (pTHX_ coro_cctx *cctx)
808{
809 dSP;
810 LOGOP myop;
811 1454
1455static void
1456slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1457{
1458 ta->prev = 0;
1459}
1460
1461static int
1462slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1463{
1464 *frame = cctx_ssl_frame;
1465
1466 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1467}
1468
1469/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1470static void ecb_noinline
1471cctx_prepare (pTHX)
1472{
812 PL_top_env = &PL_start_env; 1473 PL_top_env = &PL_start_env;
813 1474
814 if (cctx->flags & CC_TRACE) 1475 if (cctx_current->flags & CC_TRACE)
815 PL_runops = runops_trace; 1476 PL_runops = runops_trace;
816 1477
817 Zero (&myop, 1, LOGOP); 1478 /* we already must be executing an SLF op, there is no other valid way
818 myop.op_next = PL_op; 1479 * that can lead to creation of a new cctx */
819 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1480 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1481 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
820 1482
821 PUSHMARK (SP); 1483 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
822 EXTEND (SP, 2); 1484 cctx_ssl_frame = slf_frame;
823 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1485
824 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1486 slf_frame.prepare = slf_prepare_set_stacklevel;
825 PUTBACK; 1487 slf_frame.check = slf_check_set_stacklevel;
826 PL_op = (OP *)&myop; 1488}
827 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1489
828 SPAGAIN; 1490/* the tail of transfer: execute stuff we can only do after a transfer */
1491ecb_inline void
1492transfer_tail (pTHX)
1493{
1494 free_coro_mortal (aTHX);
1495}
1496
1497/* try to exit the same way perl's main function would do */
1498/* we do not bother resetting the environment or other things *7
1499/* that are not, uhm, essential */
1500/* this obviously also doesn't work when perl is embedded */
1501static void ecb_noinline ecb_cold
1502perlish_exit (pTHX)
1503{
1504 int exitstatus = perl_destruct (PL_curinterp);
1505 perl_free (PL_curinterp);
1506 exit (exitstatus);
829} 1507}
830 1508
831/* 1509/*
832 * this is a _very_ stripped down perl interpreter ;) 1510 * this is a _very_ stripped down perl interpreter ;)
833 */ 1511 */
834static void 1512static void
835coro_run (void *arg) 1513cctx_run (void *arg)
836{ 1514{
1515#ifdef USE_ITHREADS
1516# if CORO_PTHREAD
1517 PERL_SET_CONTEXT (coro_thx);
1518# endif
1519#endif
1520 {
837 dTHX; 1521 dTHX;
838 1522
839 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1523 /* normally we would need to skip the entersub here */
840 UNLOCK; 1524 /* not doing so will re-execute it, which is exactly what we want */
841
842 /* we now skip the entersub that lead to transfer() */
843 PL_op = PL_op->op_next; 1525 /* PL_nop = PL_nop->op_next */
844 1526
845 /* inject a fake subroutine call to cctx_init */ 1527 /* inject a fake subroutine call to cctx_init */
846 prepare_cctx (aTHX_ (coro_cctx *)arg); 1528 cctx_prepare (aTHX);
847 1529
1530 /* cctx_run is the alternative tail of transfer() */
1531 transfer_tail (aTHX);
1532
848 /* somebody or something will hit me for both perl_run and PL_restartop */ 1533 /* somebody or something will hit me for both perl_run and PL_restartop */
849 PL_restartop = PL_op; 1534 PL_restartop = PL_op;
850 perl_run (PL_curinterp); 1535 perl_run (PL_curinterp);
851
852 /* 1536 /*
1537 * Unfortunately, there is no way to get at the return values of the
1538 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1539 * runtime errors here, as this is just a random interpreter, not a thread.
1540 */
1541
1542 /*
853 * If perl-run returns we assume exit() was being called or the coro 1543 * If perl-run returns we assume exit() was being called or the coro
854 * fell off the end, which seems to be the only valid (non-bug) 1544 * fell off the end, which seems to be the only valid (non-bug)
855 * reason for perl_run to return. We try to exit by jumping to the 1545 * reason for perl_run to return. We try to mimic whatever perl is normally
856 * bootstrap-time "top" top_env, as we cannot restore the "main" 1546 * doing in that case. YMMV.
857 * coroutine as Coro has no such concept
858 */ 1547 */
859 PL_top_env = main_top_env; 1548 perlish_exit (aTHX);
860 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1549 }
861} 1550}
862 1551
863static coro_cctx * 1552static coro_cctx *
864cctx_new () 1553cctx_new (void)
865{ 1554{
866 coro_cctx *cctx; 1555 coro_cctx *cctx;
867 void *stack_start;
868 size_t stack_size;
869 1556
870 ++cctx_count; 1557 ++cctx_count;
871
872 Newz (0, cctx, 1, coro_cctx); 1558 New (0, cctx, 1, coro_cctx);
873 1559
874#if HAVE_MMAP 1560 cctx->gen = cctx_gen;
1561 cctx->flags = 0;
1562 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
875 1563
876 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1564 return cctx;
877 /* mmap supposedly does allocate-on-write for us */ 1565}
878 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
879 1566
880 if (cctx->sptr != (void *)-1) 1567/* create a new cctx only suitable as source */
881 { 1568static coro_cctx *
882# if CORO_STACKGUARD 1569cctx_new_empty (void)
883 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1570{
884# endif 1571 coro_cctx *cctx = cctx_new ();
885 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1572
886 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1573 cctx->stack.sptr = 0;
887 cctx->flags |= CC_MAPPED; 1574 coro_create (&cctx->cctx, 0, 0, 0, 0);
1575
1576 return cctx;
1577}
1578
1579/* create a new cctx suitable as destination/running a perl interpreter */
1580static coro_cctx *
1581cctx_new_run (void)
1582{
1583 coro_cctx *cctx = cctx_new ();
1584
1585 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
888 } 1586 {
889 else
890#endif
891 {
892 cctx->ssize = coro_stacksize * (long)sizeof (long);
893 New (0, cctx->sptr, coro_stacksize, long);
894
895 if (!cctx->sptr)
896 {
897 perror ("FATAL: unable to allocate stack for coroutine"); 1587 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
898 _exit (EXIT_FAILURE); 1588 _exit (EXIT_FAILURE);
899 }
900
901 stack_start = cctx->sptr;
902 stack_size = cctx->ssize;
903 } 1589 }
904 1590
905 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
906 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1591 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
907 1592
908 return cctx; 1593 return cctx;
909} 1594}
910 1595
911static void 1596static void
912cctx_destroy (coro_cctx *cctx) 1597cctx_destroy (coro_cctx *cctx)
913{ 1598{
914 if (!cctx) 1599 if (!cctx)
915 return; 1600 return;
916 1601
1602 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1603
917 --cctx_count; 1604 --cctx_count;
1605 coro_destroy (&cctx->cctx);
918 1606
919#if CORO_USE_VALGRIND 1607 coro_stack_free (&cctx->stack);
920 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
921#endif
922
923#if HAVE_MMAP
924 if (cctx->flags & CC_MAPPED)
925 munmap (cctx->sptr, cctx->ssize);
926 else
927#endif
928 Safefree (cctx->sptr);
929 1608
930 Safefree (cctx); 1609 Safefree (cctx);
931} 1610}
1611
1612/* wether this cctx should be destructed */
1613#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
932 1614
933static coro_cctx * 1615static coro_cctx *
934cctx_get (pTHX) 1616cctx_get (pTHX)
935{ 1617{
936 while (cctx_first) 1618 while (ecb_expect_true (cctx_first))
937 { 1619 {
938 coro_cctx *cctx = cctx_first; 1620 coro_cctx *cctx = cctx_first;
939 cctx_first = cctx->next; 1621 cctx_first = cctx->next;
940 --cctx_idle; 1622 --cctx_idle;
941 1623
942 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1624 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
943 return cctx; 1625 return cctx;
944 1626
945 cctx_destroy (cctx); 1627 cctx_destroy (cctx);
946 } 1628 }
947 1629
948 return cctx_new (); 1630 return cctx_new_run ();
949} 1631}
950 1632
951static void 1633static void
952cctx_put (coro_cctx *cctx) 1634cctx_put (coro_cctx *cctx)
953{ 1635{
1636 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1637
954 /* free another cctx if overlimit */ 1638 /* free another cctx if overlimit */
955 if (cctx_idle >= MAX_IDLE_CCTX) 1639 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
956 { 1640 {
957 coro_cctx *first = cctx_first; 1641 coro_cctx *first = cctx_first;
958 cctx_first = first->next; 1642 cctx_first = first->next;
959 --cctx_idle; 1643 --cctx_idle;
960 1644
… …
966 cctx_first = cctx; 1650 cctx_first = cctx;
967} 1651}
968 1652
969/** coroutine switching *****************************************************/ 1653/** coroutine switching *****************************************************/
970 1654
971static void NOINLINE 1655static void
972transfer_check (pTHX_ struct coro *prev, struct coro *next) 1656transfer_check (pTHX_ struct coro *prev, struct coro *next)
973{ 1657{
974 if (prev != next) 1658 /* TODO: throwing up here is considered harmful */
1659
1660 if (ecb_expect_true (prev != next))
975 { 1661 {
976 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1662 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
977 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1663 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
978 1664
979 if (next->flags & CF_RUNNING) 1665 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
980 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
981
982 if (next->flags & CF_DESTROYED)
983 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1666 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
984 1667
1668#if !PERL_VERSION_ATLEAST (5,10,0)
985 if (PL_lex_state != LEX_NOTPARSING) 1669 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
986 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1670 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1671#endif
987 } 1672 }
988} 1673}
989 1674
990/* always use the TRANSFER macro */ 1675/* always use the TRANSFER macro */
991static void NOINLINE 1676static void ecb_noinline /* noinline so we have a fixed stackframe */
992transfer (pTHX_ struct coro *prev, struct coro *next) 1677transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
993{ 1678{
994 dSTACKLEVEL; 1679 dSTACKLEVEL;
995 1680
996 /* sometimes transfer is only called to set idle_sp */ 1681 /* sometimes transfer is only called to set idle_sp */
997 if (!next) 1682 if (ecb_expect_false (!prev))
998 { 1683 {
999 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1684 cctx_current->idle_sp = STACKLEVEL;
1000 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1685 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1001 }
1002 else if (prev != next)
1003 { 1686 }
1687 else if (ecb_expect_true (prev != next))
1688 {
1004 coro_cctx *prev__cctx; 1689 coro_cctx *cctx_prev;
1005 1690
1006 if (prev->flags & CF_NEW) 1691 if (ecb_expect_false (prev->flags & CF_NEW))
1007 { 1692 {
1008 /* create a new empty context */ 1693 /* create a new empty/source context */
1009 Newz (0, prev->cctx, 1, coro_cctx);
1010 prev->flags &= ~CF_NEW; 1694 prev->flags &= ~CF_NEW;
1011 prev->flags |= CF_RUNNING; 1695 prev->flags |= CF_RUNNING;
1012 } 1696 }
1013 1697
1014 prev->flags &= ~CF_RUNNING; 1698 prev->flags &= ~CF_RUNNING;
1015 next->flags |= CF_RUNNING; 1699 next->flags |= CF_RUNNING;
1016 1700
1017 LOCK; 1701 /* first get rid of the old state */
1702 save_perl (aTHX_ prev);
1018 1703
1019 if (next->flags & CF_NEW) 1704 if (ecb_expect_false (next->flags & CF_NEW))
1020 { 1705 {
1021 /* need to start coroutine */ 1706 /* need to start coroutine */
1022 next->flags &= ~CF_NEW; 1707 next->flags &= ~CF_NEW;
1023 /* first get rid of the old state */
1024 save_perl (aTHX_ prev);
1025 /* setup coroutine call */ 1708 /* setup coroutine call */
1026 coro_setup (aTHX_ next); 1709 init_perl (aTHX_ next);
1027 } 1710 }
1028 else 1711 else
1712 load_perl (aTHX_ next);
1713
1714 /* possibly untie and reuse the cctx */
1715 if (ecb_expect_true (
1716 cctx_current->idle_sp == STACKLEVEL
1717 && !(cctx_current->flags & CC_TRACE)
1718 && !force_cctx
1719 ))
1029 { 1720 {
1030 /* coroutine already started */ 1721 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1031 save_perl (aTHX_ prev); 1722 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1032 load_perl (aTHX_ next); 1723
1724 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1725 /* without this the next cctx_get might destroy the running cctx while still in use */
1726 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1727 if (ecb_expect_true (!next->cctx))
1728 next->cctx = cctx_get (aTHX);
1729
1730 cctx_put (cctx_current);
1033 } 1731 }
1732 else
1733 prev->cctx = cctx_current;
1034 1734
1035 prev__cctx = prev->cctx; 1735 ++next->usecount;
1036 1736
1037 /* possibly "free" the cctx */ 1737 cctx_prev = cctx_current;
1038 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1738 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1739
1740 next->cctx = 0;
1741
1742 if (ecb_expect_false (cctx_prev != cctx_current))
1039 { 1743 {
1040 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1744 cctx_prev->top_env = PL_top_env;
1041 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1745 PL_top_env = cctx_current->top_env;
1042 1746 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1043 prev->cctx = 0;
1044
1045 cctx_put (prev__cctx);
1046 } 1747 }
1047 1748
1048 ++next->usecount; 1749 transfer_tail (aTHX);
1049
1050 if (!next->cctx)
1051 next->cctx = cctx_get (aTHX);
1052
1053 if (prev__cctx != next->cctx)
1054 {
1055 prev__cctx->top_env = PL_top_env;
1056 PL_top_env = next->cctx->top_env;
1057 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1058 }
1059
1060 free_coro_mortal (aTHX);
1061 UNLOCK;
1062 } 1750 }
1063} 1751}
1064 1752
1065struct transfer_args
1066{
1067 struct coro *prev, *next;
1068};
1069
1070#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1753#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1071#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1754#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1072 1755
1073/** high level stuff ********************************************************/ 1756/** high level stuff ********************************************************/
1074 1757
1758/* this function is actually Coro, not Coro::State, but we call it from here */
1759/* because it is convenient - but it hasn't been declared yet for that reason */
1075static int 1760static void
1761coro_call_on_destroy (pTHX_ struct coro *coro);
1762
1763static void
1076coro_state_destroy (pTHX_ struct coro *coro) 1764coro_state_destroy (pTHX_ struct coro *coro)
1077{ 1765{
1078 if (coro->flags & CF_DESTROYED) 1766 if (coro->flags & CF_ZOMBIE)
1079 return 0; 1767 return;
1080 1768
1769 slf_destroy (aTHX_ coro);
1770
1081 coro->flags |= CF_DESTROYED; 1771 coro->flags |= CF_ZOMBIE;
1082 1772
1083 if (coro->flags & CF_READY) 1773 if (coro->flags & CF_READY)
1084 { 1774 {
1085 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1775 /* reduce nready, as destroying a ready coro effectively unreadies it */
1086 /* alternative: look through all ready queues and remove the coro */ 1776 /* alternative: look through all ready queues and remove the coro */
1087 LOCK;
1088 --coro_nready; 1777 --coro_nready;
1089 UNLOCK;
1090 } 1778 }
1091 else 1779 else
1092 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1780 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1093
1094 if (coro->mainstack && coro->mainstack != main_mainstack)
1095 {
1096 struct coro temp;
1097
1098 if (coro->flags & CF_RUNNING)
1099 croak ("FATAL: tried to destroy currently running coroutine");
1100
1101 save_perl (aTHX_ &temp);
1102 load_perl (aTHX_ coro);
1103
1104 coro_destroy (aTHX_ coro);
1105
1106 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1107
1108 coro->mainstack = 0;
1109 }
1110
1111 cctx_destroy (coro->cctx);
1112 SvREFCNT_dec (coro->args);
1113 1781
1114 if (coro->next) coro->next->prev = coro->prev; 1782 if (coro->next) coro->next->prev = coro->prev;
1115 if (coro->prev) coro->prev->next = coro->next; 1783 if (coro->prev) coro->prev->next = coro->next;
1116 if (coro == coro_first) coro_first = coro->next; 1784 if (coro == coro_first) coro_first = coro->next;
1117 1785
1118 return 1; 1786 if (coro->mainstack
1787 && coro->mainstack != main_mainstack
1788 && coro->slot
1789 && !PL_dirty)
1790 destroy_perl (aTHX_ coro);
1791
1792 cctx_destroy (coro->cctx);
1793 SvREFCNT_dec (coro->startcv);
1794 SvREFCNT_dec (coro->args);
1795 SvREFCNT_dec (coro->swap_sv);
1796 SvREFCNT_dec (CORO_THROW);
1797
1798 coro_call_on_destroy (aTHX_ coro);
1799
1800 /* more destruction mayhem in coro_state_free */
1119} 1801}
1120 1802
1121static int 1803static int
1122coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1804coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1123{ 1805{
1124 struct coro *coro = (struct coro *)mg->mg_ptr; 1806 struct coro *coro = (struct coro *)mg->mg_ptr;
1125 mg->mg_ptr = 0; 1807 mg->mg_ptr = 0;
1126 1808
1127 coro->hv = 0;
1128
1129 if (--coro->refcnt < 0)
1130 {
1131 coro_state_destroy (aTHX_ coro); 1809 coro_state_destroy (aTHX_ coro);
1810 SvREFCNT_dec (coro->on_destroy);
1811 SvREFCNT_dec (coro->status);
1812
1132 Safefree (coro); 1813 Safefree (coro);
1133 }
1134 1814
1135 return 0; 1815 return 0;
1136} 1816}
1137 1817
1138static int 1818static int ecb_cold
1139coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1819coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1140{ 1820{
1141 struct coro *coro = (struct coro *)mg->mg_ptr; 1821 /* called when perl clones the current process the slow way (windows process emulation) */
1142 1822 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1143 ++coro->refcnt; 1823 mg->mg_ptr = 0;
1824 mg->mg_virtual = 0;
1144 1825
1145 return 0; 1826 return 0;
1146} 1827}
1147 1828
1148static MGVTBL coro_state_vtbl = { 1829static MGVTBL coro_state_vtbl = {
… …
1155# define MGf_DUP 0 1836# define MGf_DUP 0
1156#endif 1837#endif
1157}; 1838};
1158 1839
1159static void 1840static void
1160prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1841prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1161{ 1842{
1162 ta->prev = SvSTATE (prev_sv); 1843 ta->prev = SvSTATE (prev_sv);
1163 ta->next = SvSTATE (next_sv); 1844 ta->next = SvSTATE (next_sv);
1164 TRANSFER_CHECK (*ta); 1845 TRANSFER_CHECK (*ta);
1165} 1846}
1166 1847
1167static void 1848static void
1168api_transfer (SV *prev_sv, SV *next_sv) 1849api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1850{
1851 struct coro_transfer_args ta;
1852
1853 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1854 TRANSFER (ta, 1);
1855}
1856
1857/** Coro ********************************************************************/
1858
1859ecb_inline void
1860coro_enq (pTHX_ struct coro *coro)
1861{
1862 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1863
1864 SvREFCNT_inc_NN (coro->hv);
1865
1866 coro->next_ready = 0;
1867 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1868 ready [1] = coro;
1869}
1870
1871ecb_inline struct coro *
1872coro_deq (pTHX)
1873{
1874 int prio;
1875
1876 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1877 {
1878 struct coro **ready = coro_ready [prio];
1879
1880 if (ready [0])
1881 {
1882 struct coro *coro = ready [0];
1883 ready [0] = coro->next_ready;
1884 return coro;
1885 }
1886 }
1887
1888 return 0;
1889}
1890
1891static void
1892invoke_sv_ready_hook_helper (void)
1169{ 1893{
1170 dTHX; 1894 dTHX;
1171 struct transfer_args ta; 1895 dSP;
1172 1896
1173 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1897 ENTER;
1174 TRANSFER (ta); 1898 SAVETMPS;
1175}
1176 1899
1177/** Coro ********************************************************************/ 1900 PUSHMARK (SP);
1901 PUTBACK;
1902 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1178 1903
1179static void 1904 FREETMPS;
1180coro_enq (pTHX_ SV *coro_sv) 1905 LEAVE;
1181{
1182 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1183}
1184
1185static SV *
1186coro_deq (pTHX_ int min_prio)
1187{
1188 int prio = PRIO_MAX - PRIO_MIN;
1189
1190 min_prio -= PRIO_MIN;
1191 if (min_prio < 0)
1192 min_prio = 0;
1193
1194 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1195 if (AvFILLp (coro_ready [prio]) >= 0)
1196 return av_shift (coro_ready [prio]);
1197
1198 return 0;
1199} 1906}
1200 1907
1201static int 1908static int
1202api_ready (SV *coro_sv) 1909api_ready (pTHX_ SV *coro_sv)
1203{ 1910{
1204 dTHX;
1205 struct coro *coro;
1206
1207 if (SvROK (coro_sv))
1208 coro_sv = SvRV (coro_sv);
1209
1210 coro = SvSTATE (coro_sv); 1911 struct coro *coro = SvSTATE (coro_sv);
1211 1912
1212 if (coro->flags & CF_READY) 1913 if (coro->flags & CF_READY)
1213 return 0; 1914 return 0;
1214 1915
1215 coro->flags |= CF_READY; 1916 coro->flags |= CF_READY;
1216 1917
1217 LOCK; 1918 coro_enq (aTHX_ coro);
1218 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1919
1219 ++coro_nready; 1920 if (!coro_nready++)
1220 UNLOCK; 1921 if (coroapi.readyhook)
1922 coroapi.readyhook ();
1221 1923
1222 return 1; 1924 return 1;
1223} 1925}
1224 1926
1225static int 1927static int
1226api_is_ready (SV *coro_sv) 1928api_is_ready (pTHX_ SV *coro_sv)
1227{ 1929{
1228 dTHX;
1229 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1930 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1230} 1931}
1231 1932
1232static void 1933/* expects to own a reference to next->hv */
1934ecb_inline void
1233prepare_schedule (pTHX_ struct transfer_args *ta) 1935prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1234{ 1936{
1235 SV *prev_sv, *next_sv;
1236
1237 for (;;)
1238 {
1239 LOCK;
1240 next_sv = coro_deq (aTHX_ PRIO_MIN);
1241
1242 /* nothing to schedule: call the idle handler */
1243 if (!next_sv)
1244 {
1245 dSP;
1246 UNLOCK;
1247
1248 ENTER;
1249 SAVETMPS;
1250
1251 PUSHMARK (SP);
1252 PUTBACK;
1253 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1254
1255 FREETMPS;
1256 LEAVE;
1257 continue;
1258 }
1259
1260 ta->next = SvSTATE (next_sv);
1261
1262 /* cannot transfer to destroyed coros, skip and look for next */
1263 if (ta->next->flags & CF_DESTROYED)
1264 {
1265 UNLOCK;
1266 SvREFCNT_dec (next_sv);
1267 /* coro_nready is already taken care of by destroy */
1268 continue;
1269 }
1270
1271 --coro_nready;
1272 UNLOCK;
1273 break;
1274 }
1275
1276 /* free this only after the transfer */
1277 prev_sv = SvRV (coro_current); 1937 SV *prev_sv = SvRV (coro_current);
1938
1278 ta->prev = SvSTATE (prev_sv); 1939 ta->prev = SvSTATE_hv (prev_sv);
1940 ta->next = next;
1941
1279 TRANSFER_CHECK (*ta); 1942 TRANSFER_CHECK (*ta);
1280 assert (ta->next->flags & CF_READY); 1943
1281 ta->next->flags &= ~CF_READY;
1282 SvRV_set (coro_current, next_sv); 1944 SvRV_set (coro_current, (SV *)next->hv);
1283 1945
1284 LOCK;
1285 free_coro_mortal (aTHX); 1946 free_coro_mortal (aTHX);
1286 coro_mortal = prev_sv; 1947 coro_mortal = prev_sv;
1287 UNLOCK;
1288} 1948}
1289 1949
1290static void 1950static void
1951prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1952{
1953 for (;;)
1954 {
1955 struct coro *next = coro_deq (aTHX);
1956
1957 if (ecb_expect_true (next))
1958 {
1959 /* cannot transfer to destroyed coros, skip and look for next */
1960 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1961 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1962 else
1963 {
1964 next->flags &= ~CF_READY;
1965 --coro_nready;
1966
1967 prepare_schedule_to (aTHX_ ta, next);
1968 break;
1969 }
1970 }
1971 else
1972 {
1973 /* nothing to schedule: call the idle handler */
1974 if (SvROK (sv_idle)
1975 && SvOBJECT (SvRV (sv_idle)))
1976 {
1977 if (SvRV (sv_idle) == SvRV (coro_current))
1978 {
1979 require_pv ("Carp");
1980
1981 {
1982 dSP;
1983
1984 ENTER;
1985 SAVETMPS;
1986
1987 PUSHMARK (SP);
1988 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1989 PUTBACK;
1990 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1991
1992 FREETMPS;
1993 LEAVE;
1994 }
1995 }
1996
1997 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1998 api_ready (aTHX_ SvRV (sv_idle));
1999 --coro_nready;
2000 }
2001 else
2002 {
2003 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2004 dSP;
2005
2006 ENTER;
2007 SAVETMPS;
2008
2009 PUSHMARK (SP);
2010 PUTBACK;
2011 call_sv (sv_idle, G_VOID | G_DISCARD);
2012
2013 FREETMPS;
2014 LEAVE;
2015 }
2016 }
2017 }
2018}
2019
2020ecb_inline void
1291prepare_cede (pTHX_ struct transfer_args *ta) 2021prepare_cede (pTHX_ struct coro_transfer_args *ta)
1292{ 2022{
1293 api_ready (coro_current); 2023 api_ready (aTHX_ coro_current);
1294 prepare_schedule (aTHX_ ta); 2024 prepare_schedule (aTHX_ ta);
1295} 2025}
1296 2026
2027ecb_inline void
2028prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2029{
2030 SV *prev = SvRV (coro_current);
2031
2032 if (coro_nready)
2033 {
2034 prepare_schedule (aTHX_ ta);
2035 api_ready (aTHX_ prev);
2036 }
2037 else
2038 prepare_nop (aTHX_ ta);
2039}
2040
2041static void
2042api_schedule (pTHX)
2043{
2044 struct coro_transfer_args ta;
2045
2046 prepare_schedule (aTHX_ &ta);
2047 TRANSFER (ta, 1);
2048}
2049
2050static void
2051api_schedule_to (pTHX_ SV *coro_sv)
2052{
2053 struct coro_transfer_args ta;
2054 struct coro *next = SvSTATE (coro_sv);
2055
2056 SvREFCNT_inc_NN (coro_sv);
2057 prepare_schedule_to (aTHX_ &ta, next);
2058}
2059
1297static int 2060static int
1298prepare_cede_notself (pTHX_ struct transfer_args *ta) 2061api_cede (pTHX)
1299{ 2062{
1300 if (coro_nready) 2063 struct coro_transfer_args ta;
1301 { 2064
1302 SV *prev = SvRV (coro_current);
1303 prepare_schedule (aTHX_ ta); 2065 prepare_cede (aTHX_ &ta);
1304 api_ready (prev); 2066
2067 if (ecb_expect_true (ta.prev != ta.next))
2068 {
2069 TRANSFER (ta, 1);
1305 return 1; 2070 return 1;
1306 } 2071 }
1307 else 2072 else
1308 return 0; 2073 return 0;
1309} 2074}
1310 2075
1311static void
1312api_schedule (void)
1313{
1314 dTHX;
1315 struct transfer_args ta;
1316
1317 prepare_schedule (aTHX_ &ta);
1318 TRANSFER (ta);
1319}
1320
1321static int 2076static int
1322api_cede (void) 2077api_cede_notself (pTHX)
1323{ 2078{
1324 dTHX; 2079 if (coro_nready)
2080 {
1325 struct transfer_args ta; 2081 struct coro_transfer_args ta;
1326 2082
1327 prepare_cede (aTHX_ &ta); 2083 prepare_cede_notself (aTHX_ &ta);
1328
1329 if (ta.prev != ta.next)
1330 {
1331 TRANSFER (ta); 2084 TRANSFER (ta, 1);
1332 return 1; 2085 return 1;
1333 } 2086 }
1334 else 2087 else
1335 return 0; 2088 return 0;
1336} 2089}
1337 2090
1338static int 2091static void
1339api_cede_notself (void)
1340{
1341 dTHX;
1342 struct transfer_args ta;
1343
1344 if (prepare_cede_notself (aTHX_ &ta))
1345 {
1346 TRANSFER (ta);
1347 return 1;
1348 }
1349 else
1350 return 0;
1351}
1352
1353static void
1354api_trace (SV *coro_sv, int flags) 2092api_trace (pTHX_ SV *coro_sv, int flags)
1355{ 2093{
1356 dTHX;
1357 struct coro *coro = SvSTATE (coro_sv); 2094 struct coro *coro = SvSTATE (coro_sv);
1358 2095
2096 if (coro->flags & CF_RUNNING)
2097 croak ("cannot enable tracing on a running coroutine, caught");
2098
1359 if (flags & CC_TRACE) 2099 if (flags & CC_TRACE)
1360 { 2100 {
1361 if (!coro->cctx) 2101 if (!coro->cctx)
1362 coro->cctx = cctx_new (); 2102 coro->cctx = cctx_new_run ();
1363 else if (!(coro->cctx->flags & CC_TRACE)) 2103 else if (!(coro->cctx->flags & CC_TRACE))
1364 croak ("cannot enable tracing on coroutine with custom stack"); 2104 croak ("cannot enable tracing on coroutine with custom stack, caught");
1365 2105
1366 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2106 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1367 } 2107 }
1368 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2108 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1369 { 2109 {
1370 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2110 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1371 2111
1372 if (coro->flags & CF_RUNNING) 2112 if (coro->flags & CF_RUNNING)
1373 PL_runops = RUNOPS_DEFAULT; 2113 PL_runops = RUNOPS_DEFAULT;
1374 else 2114 else
1375 coro->runops = RUNOPS_DEFAULT; 2115 coro->slot->runops = RUNOPS_DEFAULT;
2116 }
2117}
2118
2119static void
2120coro_push_av (pTHX_ AV *av, I32 gimme_v)
2121{
2122 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2123 {
2124 dSP;
2125
2126 if (gimme_v == G_SCALAR)
2127 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2128 else
2129 {
2130 int i;
2131 EXTEND (SP, AvFILLp (av) + 1);
2132
2133 for (i = 0; i <= AvFILLp (av); ++i)
2134 PUSHs (AvARRAY (av)[i]);
2135 }
2136
2137 PUTBACK;
2138 }
2139}
2140
2141static void
2142coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2143{
2144 if (!coro->on_destroy)
2145 coro->on_destroy = newAV ();
2146
2147 av_push (coro->on_destroy, cb);
2148}
2149
2150static void
2151slf_destroy_join (pTHX_ struct CoroSLF *frame)
2152{
2153 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2154}
2155
2156static int
2157slf_check_join (pTHX_ struct CoroSLF *frame)
2158{
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->status)
2162 return 1;
2163
2164 frame->destroy = 0;
2165
2166 coro_push_av (aTHX_ coro->status, GIMME_V);
2167
2168 SvREFCNT_dec ((SV *)coro->hv);
2169
2170 return 0;
2171}
2172
2173static void
2174slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2177
2178 if (items > 1)
2179 croak ("join called with too many arguments");
2180
2181 if (coro->status)
2182 frame->prepare = prepare_nop;
2183 else
2184 {
2185 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2186 frame->prepare = prepare_schedule;
2187 }
2188
2189 frame->check = slf_check_join;
2190 frame->destroy = slf_destroy_join;
2191 frame->data = (void *)coro;
2192 SvREFCNT_inc (coro->hv);
2193}
2194
2195static void
2196coro_call_on_destroy (pTHX_ struct coro *coro)
2197{
2198 AV *od = coro->on_destroy;
2199
2200 if (!od)
2201 return;
2202
2203 coro->on_destroy = 0;
2204 sv_2mortal ((SV *)od);
2205
2206 while (AvFILLp (od) >= 0)
2207 {
2208 SV *cb = sv_2mortal (av_pop (od));
2209
2210 /* coro hv's (and only hv's at the moment) are supported as well */
2211 if (SvSTATEhv_p (aTHX_ cb))
2212 api_ready (aTHX_ cb);
2213 else
2214 {
2215 dSP; /* don't disturb outer sp */
2216 PUSHMARK (SP);
2217
2218 if (coro->status)
2219 {
2220 PUTBACK;
2221 coro_push_av (aTHX_ coro->status, G_ARRAY);
2222 SPAGAIN;
2223 }
2224
2225 PUTBACK;
2226 call_sv (cb, G_VOID | G_DISCARD);
2227 }
2228 }
2229}
2230
2231static void
2232coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2233{
2234 AV *av;
2235
2236 if (coro->status)
2237 {
2238 av = coro->status;
2239 av_clear (av);
2240 }
2241 else
2242 av = coro->status = newAV ();
2243
2244 /* items are actually not so common, so optimise for this case */
2245 if (items)
2246 {
2247 int i;
2248
2249 av_extend (av, items - 1);
2250
2251 for (i = 0; i < items; ++i)
2252 av_push (av, SvREFCNT_inc_NN (arg [i]));
2253 }
2254}
2255
2256static void
2257slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2258{
2259 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2260 api_ready (aTHX_ sv_manager);
2261
2262 frame->prepare = prepare_schedule;
2263 frame->check = slf_check_repeat;
2264
2265 /* as a minor optimisation, we could unwind all stacks here */
2266 /* but that puts extra pressure on pp_slf, and is not worth much */
2267 /*coro_unwind_stacks (aTHX);*/
2268}
2269
2270static void
2271slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2272{
2273 HV *coro_hv = (HV *)SvRV (coro_current);
2274
2275 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2276 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2277}
2278
2279static void
2280slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2281{
2282 HV *coro_hv;
2283 struct coro *coro;
2284
2285 if (items <= 0)
2286 croak ("Coro::cancel called without coro object,");
2287
2288 coro = SvSTATE (arg [0]);
2289 coro_hv = coro->hv;
2290
2291 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2292
2293 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2294 {
2295 /* coro currently busy cancelling something, so just notify it */
2296 coro->slf_frame.data = (void *)coro;
2297
2298 frame->prepare = prepare_nop;
2299 frame->check = slf_check_nop;
2300 }
2301 else if (coro_hv == (HV *)SvRV (coro_current))
2302 {
2303 /* cancelling the current coro is allowed, and equals terminate */
2304 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2305 }
2306 else
2307 {
2308 struct coro *self = SvSTATE_current;
2309
2310 if (!self)
2311 croak ("Coro::cancel called outside of thread content,");
2312
2313 /* otherwise we cancel directly, purely for speed reasons
2314 * unfortunately, this requires some magic trickery, as
2315 * somebody else could cancel us, so we have to fight the cancellation.
2316 * this is ugly, and hopefully fully worth the extra speed.
2317 * besides, I can't get the slow-but-safe version working...
2318 */
2319 slf_frame.data = 0;
2320 self->flags |= CF_NOCANCEL;
2321 coro_state_destroy (aTHX_ coro);
2322 self->flags &= ~CF_NOCANCEL;
2323
2324 if (slf_frame.data)
2325 {
2326 /* while we were busy we have been cancelled, so terminate */
2327 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2328 }
2329 else
2330 {
2331 frame->prepare = prepare_nop;
2332 frame->check = slf_check_nop;
2333 }
2334 }
2335}
2336
2337static int
2338slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2339{
2340 frame->prepare = 0;
2341 coro_unwind_stacks (aTHX);
2342
2343 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2344
2345 return 1;
2346}
2347
2348static int
2349safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2350{
2351 if (coro->cctx)
2352 croak ("coro inside C callback, unable to cancel at this time, caught");
2353
2354 if (coro->flags & CF_NEW)
2355 {
2356 coro_set_status (aTHX_ coro, arg, items);
2357 coro_state_destroy (aTHX_ coro);
2358 }
2359 else
2360 {
2361 if (!coro->slf_frame.prepare)
2362 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2363
2364 slf_destroy (aTHX_ coro);
2365
2366 coro_set_status (aTHX_ coro, arg, items);
2367 coro->slf_frame.prepare = prepare_nop;
2368 coro->slf_frame.check = slf_check_safe_cancel;
2369
2370 api_ready (aTHX_ (SV *)coro->hv);
2371 }
2372
2373 return 1;
2374}
2375
2376/*****************************************************************************/
2377/* async pool handler */
2378
2379static int
2380slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2381{
2382 HV *hv = (HV *)SvRV (coro_current);
2383 struct coro *coro = (struct coro *)frame->data;
2384
2385 if (!coro->invoke_cb)
2386 return 1; /* loop till we have invoke */
2387 else
2388 {
2389 hv_store (hv, "desc", sizeof ("desc") - 1,
2390 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2391
2392 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2393
2394 {
2395 dSP;
2396 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2397 PUTBACK;
1376 } 2398 }
2399
2400 SvREFCNT_dec (GvAV (PL_defgv));
2401 GvAV (PL_defgv) = coro->invoke_av;
2402 coro->invoke_av = 0;
2403
2404 return 0;
2405 }
1377} 2406}
2407
2408static void
2409slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2410{
2411 HV *hv = (HV *)SvRV (coro_current);
2412 struct coro *coro = SvSTATE_hv ((SV *)hv);
2413
2414 if (ecb_expect_true (coro->saved_deffh))
2415 {
2416 /* subsequent iteration */
2417 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2418 coro->saved_deffh = 0;
2419
2420 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2421 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2422 {
2423 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2424 return;
2425 }
2426 else
2427 {
2428 av_clear (GvAV (PL_defgv));
2429 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2430
2431 if (ecb_expect_false (coro->swap_sv))
2432 {
2433 SvREFCNT_dec_NN (coro->swap_sv);
2434 coro->swap_sv = 0;
2435 }
2436
2437 coro->prio = 0;
2438
2439 if (coro->cctx && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2440 api_trace (aTHX_ coro_current, 0);
2441
2442 frame->prepare = prepare_schedule;
2443 av_push (av_async_pool, SvREFCNT_inc (hv));
2444 }
2445 }
2446 else
2447 {
2448 /* first iteration, simply fall through */
2449 frame->prepare = prepare_nop;
2450 }
2451
2452 frame->check = slf_check_pool_handler;
2453 frame->data = (void *)coro;
2454}
2455
2456/*****************************************************************************/
2457/* rouse callback */
2458
2459#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2460
2461static void
2462coro_rouse_callback (pTHX_ CV *cv)
2463{
2464 dXSARGS;
2465 SV *data = (SV *)S_GENSUB_ARG;
2466
2467 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2468 {
2469 /* first call, set args */
2470 SV *coro = SvRV (data);
2471 AV *av = newAV ();
2472
2473 SvRV_set (data, (SV *)av);
2474
2475 /* better take a full copy of the arguments */
2476 while (items--)
2477 av_store (av, items, newSVsv (ST (items)));
2478
2479 api_ready (aTHX_ coro);
2480 SvREFCNT_dec (coro);
2481 }
2482
2483 XSRETURN_EMPTY;
2484}
2485
2486static int
2487slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2488{
2489 SV *data = (SV *)frame->data;
2490
2491 if (CORO_THROW)
2492 return 0;
2493
2494 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2495 return 1;
2496
2497 /* now push all results on the stack */
2498 {
2499 dSP;
2500 AV *av = (AV *)SvRV (data);
2501 int i;
2502
2503 EXTEND (SP, AvFILLp (av) + 1);
2504 for (i = 0; i <= AvFILLp (av); ++i)
2505 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2506
2507 /* we have stolen the elements, so set length to zero and free */
2508 AvFILLp (av) = -1;
2509 av_undef (av);
2510
2511 PUTBACK;
2512 }
2513
2514 return 0;
2515}
2516
2517static void
2518slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2519{
2520 SV *cb;
2521
2522 if (items)
2523 cb = arg [0];
2524 else
2525 {
2526 struct coro *coro = SvSTATE_current;
2527
2528 if (!coro->rouse_cb)
2529 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2530
2531 cb = sv_2mortal (coro->rouse_cb);
2532 coro->rouse_cb = 0;
2533 }
2534
2535 if (!SvROK (cb)
2536 || SvTYPE (SvRV (cb)) != SVt_PVCV
2537 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2538 croak ("Coro::rouse_wait called with illegal callback argument,");
2539
2540 {
2541 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2542 SV *data = (SV *)S_GENSUB_ARG;
2543
2544 frame->data = (void *)data;
2545 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2546 frame->check = slf_check_rouse_wait;
2547 }
2548}
2549
2550static SV *
2551coro_new_rouse_cb (pTHX)
2552{
2553 HV *hv = (HV *)SvRV (coro_current);
2554 struct coro *coro = SvSTATE_hv (hv);
2555 SV *data = newRV_inc ((SV *)hv);
2556 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2557
2558 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2559 SvREFCNT_dec (data); /* magicext increases the refcount */
2560
2561 SvREFCNT_dec (coro->rouse_cb);
2562 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2563
2564 return cb;
2565}
2566
2567/*****************************************************************************/
2568/* schedule-like-function opcode (SLF) */
2569
2570static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2571static const CV *slf_cv;
2572static SV **slf_argv;
2573static int slf_argc, slf_arga; /* count, allocated */
2574static I32 slf_ax; /* top of stack, for restore */
2575
2576/* this restores the stack in the case we patched the entersub, to */
2577/* recreate the stack frame as perl will on following calls */
2578/* since entersub cleared the stack */
2579static OP *
2580pp_restore (pTHX)
2581{
2582 int i;
2583 SV **SP = PL_stack_base + slf_ax;
2584
2585 PUSHMARK (SP);
2586
2587 EXTEND (SP, slf_argc + 1);
2588
2589 for (i = 0; i < slf_argc; ++i)
2590 PUSHs (sv_2mortal (slf_argv [i]));
2591
2592 PUSHs ((SV *)CvGV (slf_cv));
2593
2594 RETURNOP (slf_restore.op_first);
2595}
2596
2597static void
2598slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2599{
2600 SV **arg = (SV **)slf_frame.data;
2601
2602 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2603}
2604
2605static void
2606slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2607{
2608 if (items != 2)
2609 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2610
2611 frame->prepare = slf_prepare_transfer;
2612 frame->check = slf_check_nop;
2613 frame->data = (void *)arg; /* let's hope it will stay valid */
2614}
2615
2616static void
2617slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2618{
2619 frame->prepare = prepare_schedule;
2620 frame->check = slf_check_nop;
2621}
2622
2623static void
2624slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2625{
2626 struct coro *next = (struct coro *)slf_frame.data;
2627
2628 SvREFCNT_inc_NN (next->hv);
2629 prepare_schedule_to (aTHX_ ta, next);
2630}
2631
2632static void
2633slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2634{
2635 if (!items)
2636 croak ("Coro::schedule_to expects a coroutine argument, caught");
2637
2638 frame->data = (void *)SvSTATE (arg [0]);
2639 frame->prepare = slf_prepare_schedule_to;
2640 frame->check = slf_check_nop;
2641}
2642
2643static void
2644slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2645{
2646 api_ready (aTHX_ SvRV (coro_current));
2647
2648 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2649}
2650
2651static void
2652slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2653{
2654 frame->prepare = prepare_cede;
2655 frame->check = slf_check_nop;
2656}
2657
2658static void
2659slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2660{
2661 frame->prepare = prepare_cede_notself;
2662 frame->check = slf_check_nop;
2663}
2664
2665/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2666static void
2667slf_destroy (pTHX_ struct coro *coro)
2668{
2669 struct CoroSLF frame = coro->slf_frame;
2670
2671 /*
2672 * The on_destroy below most likely is from an SLF call.
2673 * Since by definition the SLF call will not finish when we destroy
2674 * the coro, we will have to force-finish it here, otherwise
2675 * cleanup functions cannot call SLF functions.
2676 */
2677 coro->slf_frame.prepare = 0;
2678
2679 /* this callback is reserved for slf functions needing to do cleanup */
2680 if (frame.destroy && frame.prepare && !PL_dirty)
2681 frame.destroy (aTHX_ &frame);
2682}
2683
2684/*
2685 * these not obviously related functions are all rolled into one
2686 * function to increase chances that they all will call transfer with the same
2687 * stack offset
2688 * SLF stands for "schedule-like-function".
2689 */
2690static OP *
2691pp_slf (pTHX)
2692{
2693 I32 checkmark; /* mark SP to see how many elements check has pushed */
2694
2695 /* set up the slf frame, unless it has already been set-up */
2696 /* the latter happens when a new coro has been started */
2697 /* or when a new cctx was attached to an existing coroutine */
2698 if (ecb_expect_true (!slf_frame.prepare))
2699 {
2700 /* first iteration */
2701 dSP;
2702 SV **arg = PL_stack_base + TOPMARK + 1;
2703 int items = SP - arg; /* args without function object */
2704 SV *gv = *sp;
2705
2706 /* do a quick consistency check on the "function" object, and if it isn't */
2707 /* for us, divert to the real entersub */
2708 if (SvTYPE (gv) != SVt_PVGV
2709 || !GvCV (gv)
2710 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2711 return PL_ppaddr[OP_ENTERSUB](aTHX);
2712
2713 if (!(PL_op->op_flags & OPf_STACKED))
2714 {
2715 /* ampersand-form of call, use @_ instead of stack */
2716 AV *av = GvAV (PL_defgv);
2717 arg = AvARRAY (av);
2718 items = AvFILLp (av) + 1;
2719 }
2720
2721 /* now call the init function, which needs to set up slf_frame */
2722 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2723 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2724
2725 /* pop args */
2726 SP = PL_stack_base + POPMARK;
2727
2728 PUTBACK;
2729 }
2730
2731 /* now that we have a slf_frame, interpret it! */
2732 /* we use a callback system not to make the code needlessly */
2733 /* complicated, but so we can run multiple perl coros from one cctx */
2734
2735 do
2736 {
2737 struct coro_transfer_args ta;
2738
2739 slf_frame.prepare (aTHX_ &ta);
2740 TRANSFER (ta, 0);
2741
2742 checkmark = PL_stack_sp - PL_stack_base;
2743 }
2744 while (slf_frame.check (aTHX_ &slf_frame));
2745
2746 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2747
2748 /* exception handling */
2749 if (ecb_expect_false (CORO_THROW))
2750 {
2751 SV *exception = sv_2mortal (CORO_THROW);
2752
2753 CORO_THROW = 0;
2754 sv_setsv (ERRSV, exception);
2755 croak (0);
2756 }
2757
2758 /* return value handling - mostly like entersub */
2759 /* make sure we put something on the stack in scalar context */
2760 if (GIMME_V == G_SCALAR
2761 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2762 {
2763 dSP;
2764 SV **bot = PL_stack_base + checkmark;
2765
2766 if (sp == bot) /* too few, push undef */
2767 bot [1] = &PL_sv_undef;
2768 else /* too many, take last one */
2769 bot [1] = *sp;
2770
2771 SP = bot + 1;
2772
2773 PUTBACK;
2774 }
2775
2776 return NORMAL;
2777}
2778
2779static void
2780api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2781{
2782 int i;
2783 SV **arg = PL_stack_base + ax;
2784 int items = PL_stack_sp - arg + 1;
2785
2786 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2787
2788 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2789 && PL_op->op_ppaddr != pp_slf)
2790 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2791
2792 CvFLAGS (cv) |= CVf_SLF;
2793 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2794 slf_cv = cv;
2795
2796 /* we patch the op, and then re-run the whole call */
2797 /* we have to put the same argument on the stack for this to work */
2798 /* and this will be done by pp_restore */
2799 slf_restore.op_next = (OP *)&slf_restore;
2800 slf_restore.op_type = OP_CUSTOM;
2801 slf_restore.op_ppaddr = pp_restore;
2802 slf_restore.op_first = PL_op;
2803
2804 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2805
2806 if (PL_op->op_flags & OPf_STACKED)
2807 {
2808 if (items > slf_arga)
2809 {
2810 slf_arga = items;
2811 Safefree (slf_argv);
2812 New (0, slf_argv, slf_arga, SV *);
2813 }
2814
2815 slf_argc = items;
2816
2817 for (i = 0; i < items; ++i)
2818 slf_argv [i] = SvREFCNT_inc (arg [i]);
2819 }
2820 else
2821 slf_argc = 0;
2822
2823 PL_op->op_ppaddr = pp_slf;
2824 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2825
2826 PL_op = (OP *)&slf_restore;
2827}
2828
2829/*****************************************************************************/
2830/* dynamic wind */
2831
2832static void
2833on_enterleave_call (pTHX_ SV *cb)
2834{
2835 dSP;
2836
2837 PUSHSTACK;
2838
2839 PUSHMARK (SP);
2840 PUTBACK;
2841 call_sv (cb, G_VOID | G_DISCARD);
2842 SPAGAIN;
2843
2844 POPSTACK;
2845}
2846
2847static SV *
2848coro_avp_pop_and_free (pTHX_ AV **avp)
2849{
2850 AV *av = *avp;
2851 SV *res = av_pop (av);
2852
2853 if (AvFILLp (av) < 0)
2854 {
2855 *avp = 0;
2856 SvREFCNT_dec (av);
2857 }
2858
2859 return res;
2860}
2861
2862static void
2863coro_pop_on_enter (pTHX_ void *coro)
2864{
2865 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2866 SvREFCNT_dec (cb);
2867}
2868
2869static void
2870coro_pop_on_leave (pTHX_ void *coro)
2871{
2872 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2873 on_enterleave_call (aTHX_ sv_2mortal (cb));
2874}
2875
2876static void
2877enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2878{
2879 if (!hook)
2880 return;
2881
2882 if (!*avp)
2883 {
2884 *avp = newAV ();
2885 AvREAL_off (*avp);
2886 }
2887
2888 av_push (*avp, (SV *)hook);
2889 av_push (*avp, (SV *)arg);
2890}
2891
2892static void
2893enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2894{
2895 AV *av = *avp;
2896 int i;
2897
2898 if (!av)
2899 return;
2900
2901 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2902 if (AvARRAY (av)[i] == (SV *)hook)
2903 {
2904 if (execute)
2905 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2906
2907 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2908 av_pop (av);
2909 av_pop (av);
2910 break;
2911 }
2912
2913 if (AvFILLp (av) >= 0)
2914 {
2915 *avp = 0;
2916 SvREFCNT_dec_NN (av);
2917 }
2918}
2919
2920static void
2921api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2922{
2923 struct coro *coro = SvSTATE (coro_sv);
2924
2925 if (SvSTATE_current == coro)
2926 if (enter)
2927 enter (aTHX_ enter_arg);
2928
2929 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2930 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2931}
2932
2933static void
2934api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2935{
2936 struct coro *coro = SvSTATE (coro_sv);
2937
2938 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2939 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2940}
2941
2942static void
2943savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2944{
2945 struct coro *coro = SvSTATE_current;
2946
2947 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2948}
2949
2950static void
2951savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2952{
2953 struct coro *coro = SvSTATE_current;
2954
2955 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2956}
2957
2958static void
2959api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2960{
2961 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2962
2963 /* this ought to be much cheaper than malloc + a single destructor call */
2964 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2965 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2966}
2967
2968/*****************************************************************************/
2969/* PerlIO::cede */
2970
2971typedef struct
2972{
2973 PerlIOBuf base;
2974 NV next, every;
2975} PerlIOCede;
2976
2977static IV ecb_cold
2978PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2979{
2980 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2981
2982 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2983 self->next = nvtime () + self->every;
2984
2985 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2986}
2987
2988static SV * ecb_cold
2989PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2990{
2991 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2992
2993 return newSVnv (self->every);
2994}
2995
2996static IV
2997PerlIOCede_flush (pTHX_ PerlIO *f)
2998{
2999 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3000 double now = nvtime ();
3001
3002 if (now >= self->next)
3003 {
3004 api_cede (aTHX);
3005 self->next = now + self->every;
3006 }
3007
3008 return PerlIOBuf_flush (aTHX_ f);
3009}
3010
3011static PerlIO_funcs PerlIO_cede =
3012{
3013 sizeof(PerlIO_funcs),
3014 "cede",
3015 sizeof(PerlIOCede),
3016 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3017 PerlIOCede_pushed,
3018 PerlIOBuf_popped,
3019 PerlIOBuf_open,
3020 PerlIOBase_binmode,
3021 PerlIOCede_getarg,
3022 PerlIOBase_fileno,
3023 PerlIOBuf_dup,
3024 PerlIOBuf_read,
3025 PerlIOBuf_unread,
3026 PerlIOBuf_write,
3027 PerlIOBuf_seek,
3028 PerlIOBuf_tell,
3029 PerlIOBuf_close,
3030 PerlIOCede_flush,
3031 PerlIOBuf_fill,
3032 PerlIOBase_eof,
3033 PerlIOBase_error,
3034 PerlIOBase_clearerr,
3035 PerlIOBase_setlinebuf,
3036 PerlIOBuf_get_base,
3037 PerlIOBuf_bufsiz,
3038 PerlIOBuf_get_ptr,
3039 PerlIOBuf_get_cnt,
3040 PerlIOBuf_set_ptrcnt,
3041};
3042
3043/*****************************************************************************/
3044/* Coro::Semaphore & Coro::Signal */
3045
3046static SV *
3047coro_waitarray_new (pTHX_ int count)
3048{
3049 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3050 AV *av = newAV ();
3051 SV **ary;
3052
3053 /* unfortunately, building manually saves memory */
3054 Newx (ary, 2, SV *);
3055 AvALLOC (av) = ary;
3056#if PERL_VERSION_ATLEAST (5,10,0)
3057 AvARRAY (av) = ary;
3058#else
3059 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3060 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3061 SvPVX ((SV *)av) = (char *)ary;
3062#endif
3063 AvMAX (av) = 1;
3064 AvFILLp (av) = 0;
3065 ary [0] = newSViv (count);
3066
3067 return newRV_noinc ((SV *)av);
3068}
3069
3070/* semaphore */
3071
3072static void
3073coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3074{
3075 SV *count_sv = AvARRAY (av)[0];
3076 IV count = SvIVX (count_sv);
3077
3078 count += adjust;
3079 SvIVX (count_sv) = count;
3080
3081 /* now wake up as many waiters as are expected to lock */
3082 while (count > 0 && AvFILLp (av) > 0)
3083 {
3084 SV *cb;
3085
3086 /* swap first two elements so we can shift a waiter */
3087 AvARRAY (av)[0] = AvARRAY (av)[1];
3088 AvARRAY (av)[1] = count_sv;
3089 cb = av_shift (av);
3090
3091 if (SvOBJECT (cb))
3092 {
3093 api_ready (aTHX_ cb);
3094 --count;
3095 }
3096 else if (SvTYPE (cb) == SVt_PVCV)
3097 {
3098 dSP;
3099 PUSHMARK (SP);
3100 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3101 PUTBACK;
3102 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3103 }
3104
3105 SvREFCNT_dec_NN (cb);
3106 }
3107}
3108
3109static void
3110coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3111{
3112 /* call $sem->adjust (0) to possibly wake up some other waiters */
3113 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3114}
3115
3116static int
3117slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3118{
3119 AV *av = (AV *)frame->data;
3120 SV *count_sv = AvARRAY (av)[0];
3121 SV *coro_hv = SvRV (coro_current);
3122
3123 frame->destroy = 0;
3124
3125 /* if we are about to throw, don't actually acquire the lock, just throw */
3126 if (ecb_expect_false (CORO_THROW))
3127 {
3128 /* we still might be responsible for the semaphore, so wake up others */
3129 coro_semaphore_adjust (aTHX_ av, 0);
3130
3131 return 0;
3132 }
3133 else if (SvIVX (count_sv) > 0)
3134 {
3135 if (acquire)
3136 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3137 else
3138 coro_semaphore_adjust (aTHX_ av, 0);
3139
3140 return 0;
3141 }
3142 else
3143 {
3144 int i;
3145 /* if we were woken up but can't down, we look through the whole */
3146 /* waiters list and only add us if we aren't in there already */
3147 /* this avoids some degenerate memory usage cases */
3148 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3149 if (AvARRAY (av)[i] == coro_hv)
3150 return 1;
3151
3152 av_push (av, SvREFCNT_inc (coro_hv));
3153 return 1;
3154 }
3155}
3156
3157static int
3158slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3159{
3160 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3161}
3162
3163static int
3164slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3165{
3166 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3167}
3168
3169static void
3170slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3171{
3172 AV *av = (AV *)SvRV (arg [0]);
3173
3174 if (SvIVX (AvARRAY (av)[0]) > 0)
3175 {
3176 frame->data = (void *)av;
3177 frame->prepare = prepare_nop;
3178 }
3179 else
3180 {
3181 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3182
3183 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3184 frame->prepare = prepare_schedule;
3185 /* to avoid race conditions when a woken-up coro gets terminated */
3186 /* we arrange for a temporary on_destroy that calls adjust (0) */
3187 frame->destroy = coro_semaphore_destroy;
3188 }
3189}
3190
3191static void
3192slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3193{
3194 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3195 frame->check = slf_check_semaphore_down;
3196}
3197
3198static void
3199slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3200{
3201 if (items >= 2)
3202 {
3203 /* callback form */
3204 AV *av = (AV *)SvRV (arg [0]);
3205 SV *cb_cv = s_get_cv_croak (arg [1]);
3206
3207 av_push (av, SvREFCNT_inc_NN (cb_cv));
3208
3209 if (SvIVX (AvARRAY (av)[0]) > 0)
3210 coro_semaphore_adjust (aTHX_ av, 0);
3211
3212 frame->prepare = prepare_nop;
3213 frame->check = slf_check_nop;
3214 }
3215 else
3216 {
3217 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3218 frame->check = slf_check_semaphore_wait;
3219 }
3220}
3221
3222/* signal */
3223
3224static void
3225coro_signal_wake (pTHX_ AV *av, int count)
3226{
3227 SvIVX (AvARRAY (av)[0]) = 0;
3228
3229 /* now signal count waiters */
3230 while (count > 0 && AvFILLp (av) > 0)
3231 {
3232 SV *cb;
3233
3234 /* swap first two elements so we can shift a waiter */
3235 cb = AvARRAY (av)[0];
3236 AvARRAY (av)[0] = AvARRAY (av)[1];
3237 AvARRAY (av)[1] = cb;
3238
3239 cb = av_shift (av);
3240
3241 if (SvTYPE (cb) == SVt_PVCV)
3242 {
3243 dSP;
3244 PUSHMARK (SP);
3245 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3246 PUTBACK;
3247 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3248 }
3249 else
3250 {
3251 api_ready (aTHX_ cb);
3252 sv_setiv (cb, 0); /* signal waiter */
3253 }
3254
3255 SvREFCNT_dec_NN (cb);
3256
3257 --count;
3258 }
3259}
3260
3261static int
3262slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3263{
3264 /* if we are about to throw, also stop waiting */
3265 return SvROK ((SV *)frame->data) && !CORO_THROW;
3266}
3267
3268static void
3269slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3270{
3271 AV *av = (AV *)SvRV (arg [0]);
3272
3273 if (items >= 2)
3274 {
3275 SV *cb_cv = s_get_cv_croak (arg [1]);
3276 av_push (av, SvREFCNT_inc_NN (cb_cv));
3277
3278 if (SvIVX (AvARRAY (av)[0]))
3279 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3280
3281 frame->prepare = prepare_nop;
3282 frame->check = slf_check_nop;
3283 }
3284 else if (SvIVX (AvARRAY (av)[0]))
3285 {
3286 SvIVX (AvARRAY (av)[0]) = 0;
3287 frame->prepare = prepare_nop;
3288 frame->check = slf_check_nop;
3289 }
3290 else
3291 {
3292 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3293
3294 av_push (av, waiter);
3295
3296 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3297 frame->prepare = prepare_schedule;
3298 frame->check = slf_check_signal_wait;
3299 }
3300}
3301
3302/*****************************************************************************/
3303/* Coro::AIO */
3304
3305#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3306
3307/* helper storage struct */
3308struct io_state
3309{
3310 int errorno;
3311 I32 laststype; /* U16 in 5.10.0 */
3312 int laststatval;
3313 Stat_t statcache;
3314};
3315
3316static void
3317coro_aio_callback (pTHX_ CV *cv)
3318{
3319 dXSARGS;
3320 AV *state = (AV *)S_GENSUB_ARG;
3321 SV *coro = av_pop (state);
3322 SV *data_sv = newSV (sizeof (struct io_state));
3323
3324 av_extend (state, items - 1);
3325
3326 sv_upgrade (data_sv, SVt_PV);
3327 SvCUR_set (data_sv, sizeof (struct io_state));
3328 SvPOK_only (data_sv);
3329
3330 {
3331 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3332
3333 data->errorno = errno;
3334 data->laststype = PL_laststype;
3335 data->laststatval = PL_laststatval;
3336 data->statcache = PL_statcache;
3337 }
3338
3339 /* now build the result vector out of all the parameters and the data_sv */
3340 {
3341 int i;
3342
3343 for (i = 0; i < items; ++i)
3344 av_push (state, SvREFCNT_inc_NN (ST (i)));
3345 }
3346
3347 av_push (state, data_sv);
3348
3349 api_ready (aTHX_ coro);
3350 SvREFCNT_dec_NN (coro);
3351 SvREFCNT_dec_NN ((AV *)state);
3352}
3353
3354static int
3355slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3356{
3357 AV *state = (AV *)frame->data;
3358
3359 /* if we are about to throw, return early */
3360 /* this does not cancel the aio request, but at least */
3361 /* it quickly returns */
3362 if (CORO_THROW)
3363 return 0;
3364
3365 /* one element that is an RV? repeat! */
3366 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3367 return 1;
3368
3369 /* restore status */
3370 {
3371 SV *data_sv = av_pop (state);
3372 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3373
3374 errno = data->errorno;
3375 PL_laststype = data->laststype;
3376 PL_laststatval = data->laststatval;
3377 PL_statcache = data->statcache;
3378
3379 SvREFCNT_dec_NN (data_sv);
3380 }
3381
3382 /* push result values */
3383 {
3384 dSP;
3385 int i;
3386
3387 EXTEND (SP, AvFILLp (state) + 1);
3388 for (i = 0; i <= AvFILLp (state); ++i)
3389 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3390
3391 PUTBACK;
3392 }
3393
3394 return 0;
3395}
3396
3397static void
3398slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3399{
3400 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3401 SV *coro_hv = SvRV (coro_current);
3402 struct coro *coro = SvSTATE_hv (coro_hv);
3403
3404 /* put our coroutine id on the state arg */
3405 av_push (state, SvREFCNT_inc_NN (coro_hv));
3406
3407 /* first see whether we have a non-zero priority and set it as AIO prio */
3408 if (coro->prio)
3409 {
3410 dSP;
3411
3412 static SV *prio_cv;
3413 static SV *prio_sv;
3414
3415 if (ecb_expect_false (!prio_cv))
3416 {
3417 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3418 prio_sv = newSViv (0);
3419 }
3420
3421 PUSHMARK (SP);
3422 sv_setiv (prio_sv, coro->prio);
3423 XPUSHs (prio_sv);
3424
3425 PUTBACK;
3426 call_sv (prio_cv, G_VOID | G_DISCARD);
3427 }
3428
3429 /* now call the original request */
3430 {
3431 dSP;
3432 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3433 int i;
3434
3435 PUSHMARK (SP);
3436
3437 /* first push all args to the stack */
3438 EXTEND (SP, items + 1);
3439
3440 for (i = 0; i < items; ++i)
3441 PUSHs (arg [i]);
3442
3443 /* now push the callback closure */
3444 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3445
3446 /* now call the AIO function - we assume our request is uncancelable */
3447 PUTBACK;
3448 call_sv ((SV *)req, G_VOID | G_DISCARD);
3449 }
3450
3451 /* now that the request is going, we loop till we have a result */
3452 frame->data = (void *)state;
3453 frame->prepare = prepare_schedule;
3454 frame->check = slf_check_aio_req;
3455}
3456
3457static void
3458coro_aio_req_xs (pTHX_ CV *cv)
3459{
3460 dXSARGS;
3461
3462 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3463
3464 XSRETURN_EMPTY;
3465}
3466
3467/*****************************************************************************/
3468
3469#if CORO_CLONE
3470# include "clone.c"
3471#endif
3472
3473/*****************************************************************************/
3474
3475static SV *
3476coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3477{
3478 SV *coro_sv;
3479 struct coro *coro;
3480 MAGIC *mg;
3481 HV *hv;
3482 SV *cb;
3483 int i;
3484
3485 if (argc > 0)
3486 {
3487 cb = s_get_cv_croak (argv [0]);
3488
3489 if (!is_coro)
3490 {
3491 if (CvISXSUB (cb))
3492 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3493
3494 if (!CvROOT (cb))
3495 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3496 }
3497 }
3498
3499 Newz (0, coro, 1, struct coro);
3500 coro->args = newAV ();
3501 coro->flags = CF_NEW;
3502
3503 if (coro_first) coro_first->prev = coro;
3504 coro->next = coro_first;
3505 coro_first = coro;
3506
3507 coro->hv = hv = newHV ();
3508 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3509 mg->mg_flags |= MGf_DUP;
3510 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3511
3512 if (argc > 0)
3513 {
3514 av_extend (coro->args, argc + is_coro - 1);
3515
3516 if (is_coro)
3517 {
3518 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3519 cb = (SV *)cv_coro_run;
3520 }
3521
3522 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3523
3524 for (i = 1; i < argc; i++)
3525 av_push (coro->args, newSVsv (argv [i]));
3526 }
3527
3528 return coro_sv;
3529}
3530
3531#ifndef __cplusplus
3532ecb_cold XS(boot_Coro__State);
3533#endif
3534
3535#if CORO_JIT
3536
3537static void ecb_noinline ecb_cold
3538pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3539{
3540 dSP;
3541 AV *av = newAV ();
3542
3543 av_store (av, 3, newSVuv (d));
3544 av_store (av, 2, newSVuv (c));
3545 av_store (av, 1, newSVuv (b));
3546 av_store (av, 0, newSVuv (a));
3547
3548 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3549
3550 PUTBACK;
3551}
3552
3553static void ecb_noinline ecb_cold
3554jit_init (pTHX)
3555{
3556 dSP;
3557 SV *load, *save;
3558 char *map_base;
3559 char *load_ptr, *save_ptr;
3560 STRLEN load_len, save_len, map_len;
3561 int count;
3562
3563 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3564
3565 PUSHMARK (SP);
3566 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3567 #include "state.h"
3568 count = call_pv ("Coro::State::_jit", G_ARRAY);
3569 SPAGAIN;
3570
3571 save = POPs; save_ptr = SvPVbyte (save, save_len);
3572 load = POPs; load_ptr = SvPVbyte (load, load_len);
3573
3574 map_len = load_len + save_len + 16;
3575
3576 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3577
3578 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3579
3580 load_perl_slots = (load_save_perl_slots_type)map_base;
3581 memcpy (map_base, load_ptr, load_len);
3582
3583 map_base += (load_len + 15) & ~15;
3584
3585 save_perl_slots = (load_save_perl_slots_type)map_base;
3586 memcpy (map_base, save_ptr, save_len);
3587
3588 /* we are good citizens and try to make the page read-only, so the evil evil */
3589 /* hackers might have it a bit more difficult */
3590 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3591
3592 PUTBACK;
3593 eval_pv ("undef &Coro::State::_jit", 1);
3594}
3595
3596#endif
1378 3597
1379MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3598MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1380 3599
1381PROTOTYPES: DISABLE 3600PROTOTYPES: DISABLE
1382 3601
1383BOOT: 3602BOOT:
1384{ 3603{
3604#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3605#include "state.h"
1385#ifdef USE_ITHREADS 3606#ifdef USE_ITHREADS
1386 MUTEX_INIT (&coro_mutex); 3607# if CORO_PTHREAD
3608 coro_thx = PERL_GET_CONTEXT;
1387#endif 3609# endif
1388 BOOT_PAGESIZE; 3610#endif
3611 /* perl defines these to check for existance first, but why it doesn't */
3612 /* just create them one at init time is not clear to me, except for */
3613 /* programs trying to delete them, but... */
3614 /* anyway, we declare this as invalid and make sure they are initialised here */
3615 DEFSV;
3616 ERRSV;
1389 3617
3618 cctx_current = cctx_new_empty ();
3619
1390 irsgv = gv_fetchpv ("/", 1, SVt_PV); 3620 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3621 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3622
3623 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3624 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3625 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3626
3627 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3628 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1391 3629
1392 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3630 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1393 3631
1394 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3632 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1395 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3633 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1400 main_top_env = PL_top_env; 3638 main_top_env = PL_top_env;
1401 3639
1402 while (main_top_env->je_prev) 3640 while (main_top_env->je_prev)
1403 main_top_env = main_top_env->je_prev; 3641 main_top_env = main_top_env->je_prev;
1404 3642
3643 {
3644 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3645
3646 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3647 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3648
3649 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3650 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3651 }
3652
1405 coroapi.ver = CORO_API_VERSION; 3653 coroapi.ver = CORO_API_VERSION;
3654 coroapi.rev = CORO_API_REVISION;
3655
1406 coroapi.transfer = api_transfer; 3656 coroapi.transfer = api_transfer;
1407 3657
3658 coroapi.sv_state = SvSTATE_;
3659 coroapi.execute_slf = api_execute_slf;
3660 coroapi.prepare_nop = prepare_nop;
3661 coroapi.prepare_schedule = prepare_schedule;
3662 coroapi.prepare_cede = prepare_cede;
3663 coroapi.prepare_cede_notself = prepare_cede_notself;
3664
3665 time_init (aTHX);
3666
1408 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3667 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3668#if CORO_JIT
3669 PUTBACK;
3670 jit_init (aTHX);
3671 SPAGAIN;
3672#endif
1409} 3673}
1410 3674
1411SV * 3675SV *
1412new (char *klass, ...) 3676new (SV *klass, ...)
3677 ALIAS:
3678 Coro::new = 1
1413 CODE: 3679 CODE:
1414{ 3680 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1415 struct coro *coro;
1416 HV *hv;
1417 int i;
1418
1419 Newz (0, coro, 1, struct coro);
1420 coro->args = newAV ();
1421 coro->flags = CF_NEW;
1422
1423 if (coro_first) coro_first->prev = coro;
1424 coro->next = coro_first;
1425 coro_first = coro;
1426
1427 coro->hv = hv = newHV ();
1428 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1429 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1430
1431 for (i = 1; i < items; i++)
1432 av_push (coro->args, newSVsv (ST (i)));
1433}
1434 OUTPUT:
1435 RETVAL
1436
1437# these not obviously related functions are all rolled into the same xs
1438# function to increase chances that they all will call transfer with the same
1439# stack offset
1440void
1441_set_stacklevel (...)
1442 ALIAS:
1443 Coro::State::transfer = 1
1444 Coro::schedule = 2
1445 Coro::cede = 3
1446 Coro::cede_notself = 4
1447 CODE:
1448{
1449 struct transfer_args ta;
1450
1451 switch (ix)
1452 {
1453 case 0:
1454 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1455 ta.next = 0;
1456 break;
1457
1458 case 1:
1459 if (items != 2)
1460 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1461
1462 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1463 break;
1464
1465 case 2:
1466 prepare_schedule (aTHX_ &ta);
1467 break;
1468
1469 case 3:
1470 prepare_cede (aTHX_ &ta);
1471 break;
1472
1473 case 4:
1474 if (!prepare_cede_notself (aTHX_ &ta))
1475 XSRETURN_EMPTY;
1476
1477 break;
1478 }
1479
1480 BARRIER;
1481 TRANSFER (ta);
1482
1483 if (GIMME_V != G_VOID && ta.next != ta.prev)
1484 XSRETURN_YES;
1485}
1486
1487bool
1488_destroy (SV *coro_sv)
1489 CODE:
1490 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1491 OUTPUT: 3681 OUTPUT:
1492 RETVAL 3682 RETVAL
1493 3683
1494void 3684void
1495_exit (code) 3685transfer (...)
1496 int code
1497 PROTOTYPE: $ 3686 PROTOTYPE: $$
1498 CODE: 3687 CODE:
1499 _exit (code); 3688 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3689
3690SV *
3691clone (Coro::State coro)
3692 CODE:
3693{
3694#if CORO_CLONE
3695 struct coro *ncoro = coro_clone (aTHX_ coro);
3696 MAGIC *mg;
3697 /* TODO: too much duplication */
3698 ncoro->hv = newHV ();
3699 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3700 mg->mg_flags |= MGf_DUP;
3701 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3702#else
3703 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3704#endif
3705}
3706 OUTPUT:
3707 RETVAL
1500 3708
1501int 3709int
1502cctx_stacksize (int new_stacksize = 0) 3710cctx_stacksize (int new_stacksize = 0)
3711 PROTOTYPE: ;$
1503 CODE: 3712 CODE:
1504 RETVAL = coro_stacksize; 3713 RETVAL = cctx_stacksize;
1505 if (new_stacksize) 3714 if (new_stacksize)
3715 {
1506 coro_stacksize = new_stacksize; 3716 cctx_stacksize = new_stacksize;
3717 ++cctx_gen;
3718 }
1507 OUTPUT: 3719 OUTPUT:
1508 RETVAL 3720 RETVAL
1509 3721
1510int 3722int
3723cctx_max_idle (int max_idle = 0)
3724 PROTOTYPE: ;$
3725 CODE:
3726 RETVAL = cctx_max_idle;
3727 if (max_idle > 1)
3728 cctx_max_idle = max_idle;
3729 OUTPUT:
3730 RETVAL
3731
3732int
1511cctx_count () 3733cctx_count ()
3734 PROTOTYPE:
1512 CODE: 3735 CODE:
1513 RETVAL = cctx_count; 3736 RETVAL = cctx_count;
1514 OUTPUT: 3737 OUTPUT:
1515 RETVAL 3738 RETVAL
1516 3739
1517int 3740int
1518cctx_idle () 3741cctx_idle ()
3742 PROTOTYPE:
1519 CODE: 3743 CODE:
1520 RETVAL = cctx_idle; 3744 RETVAL = cctx_idle;
1521 OUTPUT: 3745 OUTPUT:
1522 RETVAL 3746 RETVAL
1523 3747
1524void 3748void
1525list () 3749list ()
3750 PROTOTYPE:
1526 PPCODE: 3751 PPCODE:
1527{ 3752{
1528 struct coro *coro; 3753 struct coro *coro;
1529 for (coro = coro_first; coro; coro = coro->next) 3754 for (coro = coro_first; coro; coro = coro->next)
1530 if (coro->hv) 3755 if (coro->hv)
1531 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3756 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1532} 3757}
1533 3758
… …
1535call (Coro::State coro, SV *coderef) 3760call (Coro::State coro, SV *coderef)
1536 ALIAS: 3761 ALIAS:
1537 eval = 1 3762 eval = 1
1538 CODE: 3763 CODE:
1539{ 3764{
1540 if (coro->mainstack) 3765 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1541 { 3766 {
1542 struct coro temp; 3767 struct coro *current = SvSTATE_current;
1543 Zero (&temp, 1, struct coro); 3768 struct CoroSLF slf_save;
1544 3769
1545 if (!(coro->flags & CF_RUNNING)) 3770 if (current != coro)
1546 { 3771 {
3772 PUTBACK;
1547 save_perl (aTHX_ &temp); 3773 save_perl (aTHX_ current);
1548 load_perl (aTHX_ coro); 3774 load_perl (aTHX_ coro);
3775 /* the coro is most likely in an active SLF call.
3776 * while not strictly required (the code we execute is
3777 * not allowed to call any SLF functions), it's cleaner
3778 * to reinitialise the slf_frame and restore it later.
3779 * This might one day allow us to actually do SLF calls
3780 * from code executed here.
3781 */
3782 slf_save = slf_frame;
3783 slf_frame.prepare = 0;
3784 SPAGAIN;
1549 } 3785 }
1550 3786
1551 { 3787 PUSHSTACK;
1552 dSP; 3788
1553 ENTER;
1554 SAVETMPS;
1555 PUSHMARK (SP); 3789 PUSHMARK (SP);
1556 PUTBACK; 3790 PUTBACK;
3791
1557 if (ix) 3792 if (ix)
1558 eval_sv (coderef, 0); 3793 eval_sv (coderef, 0);
1559 else 3794 else
1560 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3795 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3796
3797 POPSTACK;
1561 SPAGAIN; 3798 SPAGAIN;
1562 FREETMPS;
1563 LEAVE;
1564 PUTBACK;
1565 }
1566 3799
1567 if (!(coro->flags & CF_RUNNING)) 3800 if (current != coro)
1568 { 3801 {
3802 PUTBACK;
3803 slf_frame = slf_save;
1569 save_perl (aTHX_ coro); 3804 save_perl (aTHX_ coro);
1570 load_perl (aTHX_ &temp); 3805 load_perl (aTHX_ current);
3806 SPAGAIN;
1571 } 3807 }
1572 } 3808 }
1573} 3809}
1574 3810
1575SV * 3811SV *
… …
1577 PROTOTYPE: $ 3813 PROTOTYPE: $
1578 ALIAS: 3814 ALIAS:
1579 is_ready = CF_READY 3815 is_ready = CF_READY
1580 is_running = CF_RUNNING 3816 is_running = CF_RUNNING
1581 is_new = CF_NEW 3817 is_new = CF_NEW
1582 is_destroyed = CF_DESTROYED 3818 is_destroyed = CF_ZOMBIE
3819 is_zombie = CF_ZOMBIE
3820 is_suspended = CF_SUSPENDED
1583 CODE: 3821 CODE:
1584 RETVAL = boolSV (coro->flags & ix); 3822 RETVAL = boolSV (coro->flags & ix);
1585 OUTPUT: 3823 OUTPUT:
1586 RETVAL 3824 RETVAL
1587 3825
1588void 3826void
3827throw (SV *self, SV *exception = &PL_sv_undef)
3828 PROTOTYPE: $;$
3829 CODE:
3830{
3831 struct coro *coro = SvSTATE (self);
3832 struct coro *current = SvSTATE_current;
3833 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3834 SvREFCNT_dec (*exceptionp);
3835 SvGETMAGIC (exception);
3836 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3837
3838 api_ready (aTHX_ self);
3839}
3840
3841void
1589api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3842api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3843 PROTOTYPE: $;$
3844 C_ARGS: aTHX_ coro, flags
1590 3845
1591SV * 3846SV *
1592has_stack (Coro::State coro) 3847has_cctx (Coro::State coro)
1593 PROTOTYPE: $ 3848 PROTOTYPE: $
1594 CODE: 3849 CODE:
1595 RETVAL = boolSV (!!coro->cctx); 3850 /* maybe manage the running flag differently */
3851 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1596 OUTPUT: 3852 OUTPUT:
1597 RETVAL 3853 RETVAL
1598 3854
1599int 3855int
1600is_traced (Coro::State coro) 3856is_traced (Coro::State coro)
… …
1602 CODE: 3858 CODE:
1603 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3859 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1604 OUTPUT: 3860 OUTPUT:
1605 RETVAL 3861 RETVAL
1606 3862
1607IV 3863UV
1608rss (Coro::State coro) 3864rss (Coro::State coro)
1609 PROTOTYPE: $ 3865 PROTOTYPE: $
1610 ALIAS: 3866 ALIAS:
1611 usecount = 1 3867 usecount = 1
1612 CODE: 3868 CODE:
… …
1616 case 1: RETVAL = coro->usecount; break; 3872 case 1: RETVAL = coro->usecount; break;
1617 } 3873 }
1618 OUTPUT: 3874 OUTPUT:
1619 RETVAL 3875 RETVAL
1620 3876
3877void
3878force_cctx ()
3879 PROTOTYPE:
3880 CODE:
3881 cctx_current->idle_sp = 0;
3882
3883void
3884swap_defsv (Coro::State self)
3885 PROTOTYPE: $
3886 ALIAS:
3887 swap_defav = 1
3888 CODE:
3889 if (!self->slot)
3890 croak ("cannot swap state with coroutine that has no saved state,");
3891 else
3892 {
3893 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3894 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3895
3896 SV *tmp = *src; *src = *dst; *dst = tmp;
3897 }
3898
3899void
3900cancel (Coro::State self)
3901 CODE:
3902 coro_state_destroy (aTHX_ self);
3903
3904SV *
3905enable_times (int enabled = enable_times)
3906 CODE:
3907{
3908 RETVAL = boolSV (enable_times);
3909
3910 if (enabled != enable_times)
3911 {
3912 enable_times = enabled;
3913
3914 coro_times_update ();
3915 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3916 }
3917}
3918 OUTPUT:
3919 RETVAL
3920
3921void
3922times (Coro::State self)
3923 PPCODE:
3924{
3925 struct coro *current = SvSTATE (coro_current);
3926
3927 if (ecb_expect_false (current == self))
3928 {
3929 coro_times_update ();
3930 coro_times_add (SvSTATE (coro_current));
3931 }
3932
3933 EXTEND (SP, 2);
3934 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3935 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3936
3937 if (ecb_expect_false (current == self))
3938 coro_times_sub (SvSTATE (coro_current));
3939}
3940
3941void
3942swap_sv (Coro::State coro, SV *sva, SV *svb)
3943 CODE:
3944{
3945 struct coro *current = SvSTATE_current;
3946 AV *swap_sv;
3947 int i;
3948
3949 sva = SvRV (sva);
3950 svb = SvRV (svb);
3951
3952 if (current == coro)
3953 SWAP_SVS_LEAVE (current);
3954
3955 if (!coro->swap_sv)
3956 coro->swap_sv = newAV ();
3957
3958 swap_sv = coro->swap_sv;
3959
3960 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3961 {
3962 SV *a = AvARRAY (swap_sv)[i ];
3963 SV *b = AvARRAY (swap_sv)[i + 1];
3964
3965 if (a == sva && b == svb)
3966 {
3967 SvREFCNT_dec_NN (a);
3968 SvREFCNT_dec_NN (b);
3969
3970 for (; i <= AvFILLp (swap_sv) - 2; i++)
3971 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3972
3973 AvFILLp (swap_sv) -= 2;
3974
3975 goto removed;
3976 }
3977 }
3978
3979 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3980 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3981
3982 removed:
3983
3984 if (current == coro)
3985 SWAP_SVS_ENTER (current);
3986}
3987
1621 3988
1622MODULE = Coro::State PACKAGE = Coro 3989MODULE = Coro::State PACKAGE = Coro
1623 3990
1624BOOT: 3991BOOT:
1625{ 3992{
1626 int i; 3993 if (SVt_LAST > 32)
3994 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1627 3995
1628 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3996 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1629 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3997 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3998 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3999 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1630 av_async_pool = get_av ("Coro::async_pool", TRUE); 4000 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4001 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4002 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4003 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1631 4004
1632 coro_current = get_sv ("Coro::current", FALSE); 4005 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1633 SvREADONLY_on (coro_current); 4006 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4007 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4008 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1634 4009
1635 coro_stash = gv_stashpv ("Coro", TRUE); 4010 coro_stash = gv_stashpv ("Coro", TRUE);
1636 4011
1637 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4012 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1638 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4013 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1639 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4014 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1640 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4015 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1641 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4016 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1642 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4017 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1643
1644 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1645 coro_ready[i] = newAV ();
1646 4018
1647 { 4019 {
1648 SV *sv = perl_get_sv("Coro::API", 1); 4020 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1649 4021
1650 coroapi.schedule = api_schedule; 4022 coroapi.schedule = api_schedule;
4023 coroapi.schedule_to = api_schedule_to;
1651 coroapi.cede = api_cede; 4024 coroapi.cede = api_cede;
1652 coroapi.cede_notself = api_cede_notself; 4025 coroapi.cede_notself = api_cede_notself;
1653 coroapi.ready = api_ready; 4026 coroapi.ready = api_ready;
1654 coroapi.is_ready = api_is_ready; 4027 coroapi.is_ready = api_is_ready;
1655 coroapi.nready = &coro_nready; 4028 coroapi.nready = coro_nready;
1656 coroapi.current = coro_current; 4029 coroapi.current = coro_current;
1657 4030
4031 coroapi.enterleave_hook = api_enterleave_hook;
4032 coroapi.enterleave_unhook = api_enterleave_unhook;
4033 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4034
1658 GCoroAPI = &coroapi; 4035 /*GCoroAPI = &coroapi;*/
1659 sv_setiv (sv, (IV)&coroapi); 4036 sv_setiv (sv, (IV)&coroapi);
1660 SvREADONLY_on (sv); 4037 SvREADONLY_on (sv);
1661 } 4038 }
1662} 4039}
4040
4041SV *
4042async (...)
4043 PROTOTYPE: &@
4044 CODE:
4045 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4046 api_ready (aTHX_ RETVAL);
4047 OUTPUT:
4048 RETVAL
4049
4050void
4051_destroy (Coro::State coro)
4052 CODE:
4053 /* used by the manager thread */
4054 coro_state_destroy (aTHX_ coro);
4055
4056void
4057on_destroy (Coro::State coro, SV *cb)
4058 CODE:
4059 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4060
4061void
4062join (...)
4063 CODE:
4064 CORO_EXECUTE_SLF_XS (slf_init_join);
4065
4066void
4067terminate (...)
4068 CODE:
4069 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4070
4071void
4072cancel (...)
4073 CODE:
4074 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4075
4076int
4077safe_cancel (Coro::State self, ...)
4078 C_ARGS: aTHX_ self, &ST (1), items - 1
4079
4080void
4081schedule (...)
4082 CODE:
4083 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4084
4085void
4086schedule_to (...)
4087 CODE:
4088 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4089
4090void
4091cede_to (...)
4092 CODE:
4093 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4094
4095void
4096cede (...)
4097 CODE:
4098 CORO_EXECUTE_SLF_XS (slf_init_cede);
4099
4100void
4101cede_notself (...)
4102 CODE:
4103 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1663 4104
1664void 4105void
1665_set_current (SV *current) 4106_set_current (SV *current)
1666 PROTOTYPE: $ 4107 PROTOTYPE: $
1667 CODE: 4108 CODE:
1668 SvREFCNT_dec (SvRV (coro_current)); 4109 SvREFCNT_dec_NN (SvRV (coro_current));
1669 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4110 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4111
4112void
4113_set_readyhook (SV *hook)
4114 PROTOTYPE: $
4115 CODE:
4116 SvREFCNT_dec (coro_readyhook);
4117 SvGETMAGIC (hook);
4118 if (SvOK (hook))
4119 {
4120 coro_readyhook = newSVsv (hook);
4121 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4122 }
4123 else
4124 {
4125 coro_readyhook = 0;
4126 CORO_READYHOOK = 0;
4127 }
1670 4128
1671int 4129int
1672prio (Coro::State coro, int newprio = 0) 4130prio (Coro::State coro, int newprio = 0)
4131 PROTOTYPE: $;$
1673 ALIAS: 4132 ALIAS:
1674 nice = 1 4133 nice = 1
1675 CODE: 4134 CODE:
1676{ 4135{
1677 RETVAL = coro->prio; 4136 RETVAL = coro->prio;
… …
1679 if (items > 1) 4138 if (items > 1)
1680 { 4139 {
1681 if (ix) 4140 if (ix)
1682 newprio = coro->prio - newprio; 4141 newprio = coro->prio - newprio;
1683 4142
1684 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4143 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1685 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4144 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1686 4145
1687 coro->prio = newprio; 4146 coro->prio = newprio;
1688 } 4147 }
1689} 4148}
1690 OUTPUT: 4149 OUTPUT:
… …
1692 4151
1693SV * 4152SV *
1694ready (SV *self) 4153ready (SV *self)
1695 PROTOTYPE: $ 4154 PROTOTYPE: $
1696 CODE: 4155 CODE:
1697 RETVAL = boolSV (api_ready (self)); 4156 RETVAL = boolSV (api_ready (aTHX_ self));
1698 OUTPUT: 4157 OUTPUT:
1699 RETVAL 4158 RETVAL
1700 4159
1701int 4160int
1702nready (...) 4161nready (...)
… …
1704 CODE: 4163 CODE:
1705 RETVAL = coro_nready; 4164 RETVAL = coro_nready;
1706 OUTPUT: 4165 OUTPUT:
1707 RETVAL 4166 RETVAL
1708 4167
1709# for async_pool speedup
1710void 4168void
1711_pool_1 (SV *cb) 4169suspend (Coro::State self)
4170 PROTOTYPE: $
1712 CODE: 4171 CODE:
1713{ 4172 self->flags |= CF_SUSPENDED;
1714 struct coro *coro = SvSTATE (coro_current);
1715 HV *hv = (HV *)SvRV (coro_current);
1716 AV *defav = GvAV (PL_defgv);
1717 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718 AV *invoke_av;
1719 int i, len;
1720 4173
1721 if (!invoke) 4174void
1722 croak ("\3terminate\2\n"); 4175resume (Coro::State self)
4176 PROTOTYPE: $
4177 CODE:
4178 self->flags &= ~CF_SUSPENDED;
1723 4179
1724 SvREFCNT_dec (coro->saved_deffh); 4180void
1725 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 4181_pool_handler (...)
4182 CODE:
4183 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1726 4184
1727 hv_store (hv, "desc", sizeof ("desc") - 1, 4185void
1728 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 4186async_pool (SV *cv, ...)
4187 PROTOTYPE: &@
4188 PPCODE:
4189{
4190 HV *hv = (HV *)av_pop (av_async_pool);
4191 AV *av = newAV ();
4192 SV *cb = ST (0);
4193 int i;
1729 4194
1730 invoke_av = (AV *)SvRV (invoke); 4195 av_extend (av, items - 2);
1731 len = av_len (invoke_av); 4196 for (i = 1; i < items; ++i)
4197 av_push (av, SvREFCNT_inc_NN (ST (i)));
1732 4198
1733 sv_setsv (cb, AvARRAY (invoke_av)[0]); 4199 if ((SV *)hv == &PL_sv_undef)
1734
1735 if (len > 0)
1736 { 4200 {
1737 av_fill (defav, len - 1); 4201 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1738 for (i = 0; i < len; ++i) 4202 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1739 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4203 SvREFCNT_dec_NN (sv);
1740 } 4204 }
1741 4205
4206 {
4207 struct coro *coro = SvSTATE_hv (hv);
4208
4209 assert (!coro->invoke_cb);
4210 assert (!coro->invoke_av);
4211 coro->invoke_cb = SvREFCNT_inc (cb);
4212 coro->invoke_av = av;
4213 }
4214
4215 api_ready (aTHX_ (SV *)hv);
4216
4217 if (GIMME_V != G_VOID)
4218 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4219 else
1742 SvREFCNT_dec (invoke); 4220 SvREFCNT_dec_NN (hv);
1743} 4221}
1744 4222
1745void 4223SV *
1746_pool_2 (SV *cb) 4224rouse_cb ()
4225 PROTOTYPE:
1747 CODE: 4226 CODE:
1748{ 4227 RETVAL = coro_new_rouse_cb (aTHX);
1749 struct coro *coro = SvSTATE (coro_current);
1750
1751 sv_setsv (cb, &PL_sv_undef);
1752
1753 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1754 coro->saved_deffh = 0;
1755
1756 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1757 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1758 croak ("\3terminate\2\n");
1759
1760 av_clear (GvAV (PL_defgv));
1761 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1762 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1763
1764 coro->prio = 0;
1765
1766 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1767 api_trace (coro_current, 0);
1768
1769 av_push (av_async_pool, newSVsv (coro_current));
1770}
1771
1772
1773MODULE = Coro::State PACKAGE = Coro::AIO
1774
1775SV *
1776_get_state ()
1777 CODE:
1778{
1779 struct io_state *data;
1780
1781 RETVAL = newSV (sizeof (struct io_state));
1782 data = (struct io_state *)SvPVX (RETVAL);
1783 SvCUR_set (RETVAL, sizeof (struct io_state));
1784 SvPOK_only (RETVAL);
1785
1786 data->errorno = errno;
1787 data->laststype = PL_laststype;
1788 data->laststatval = PL_laststatval;
1789 data->statcache = PL_statcache;
1790}
1791 OUTPUT: 4228 OUTPUT:
1792 RETVAL 4229 RETVAL
1793 4230
1794void 4231void
1795_set_state (char *data_) 4232rouse_wait (...)
4233 PROTOTYPE: ;$
4234 PPCODE:
4235 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4236
4237void
4238on_enter (SV *block)
4239 ALIAS:
4240 on_leave = 1
1796 PROTOTYPE: $ 4241 PROTOTYPE: &
1797 CODE: 4242 CODE:
1798{ 4243{
1799 struct io_state *data = (void *)data_; 4244 struct coro *coro = SvSTATE_current;
4245 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1800 4246
1801 errno = data->errorno; 4247 block = s_get_cv_croak (block);
1802 PL_laststype = data->laststype;
1803 PL_laststatval = data->laststatval;
1804 PL_statcache = data->statcache;
1805}
1806 4248
4249 if (!*avp)
4250 *avp = newAV ();
4251
4252 av_push (*avp, SvREFCNT_inc (block));
4253
4254 if (!ix)
4255 on_enterleave_call (aTHX_ block);
4256
4257 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4258 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4259 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4260}
4261
4262
4263MODULE = Coro::State PACKAGE = PerlIO::cede
4264
4265BOOT:
4266 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4267
4268
4269MODULE = Coro::State PACKAGE = Coro::Semaphore
4270
4271SV *
4272new (SV *klass, SV *count = 0)
4273 CODE:
4274{
4275 int semcnt = 1;
4276
4277 if (count)
4278 {
4279 SvGETMAGIC (count);
4280
4281 if (SvOK (count))
4282 semcnt = SvIV (count);
4283 }
4284
4285 RETVAL = sv_bless (
4286 coro_waitarray_new (aTHX_ semcnt),
4287 GvSTASH (CvGV (cv))
4288 );
4289}
4290 OUTPUT:
4291 RETVAL
4292
4293# helper for Coro::Channel and others
4294SV *
4295_alloc (int count)
4296 CODE:
4297 RETVAL = coro_waitarray_new (aTHX_ count);
4298 OUTPUT:
4299 RETVAL
4300
4301SV *
4302count (SV *self)
4303 CODE:
4304 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4305 OUTPUT:
4306 RETVAL
4307
4308void
4309up (SV *self)
4310 CODE:
4311 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4312
4313void
4314adjust (SV *self, int adjust)
4315 CODE:
4316 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4317
4318void
4319down (...)
4320 CODE:
4321 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4322
4323void
4324wait (...)
4325 CODE:
4326 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4327
4328void
4329try (SV *self)
4330 PPCODE:
4331{
4332 AV *av = (AV *)SvRV (self);
4333 SV *count_sv = AvARRAY (av)[0];
4334 IV count = SvIVX (count_sv);
4335
4336 if (count > 0)
4337 {
4338 --count;
4339 SvIVX (count_sv) = count;
4340 XSRETURN_YES;
4341 }
4342 else
4343 XSRETURN_NO;
4344}
4345
4346void
4347waiters (SV *self)
4348 PPCODE:
4349{
4350 AV *av = (AV *)SvRV (self);
4351 int wcount = AvFILLp (av) + 1 - 1;
4352
4353 if (GIMME_V == G_SCALAR)
4354 XPUSHs (sv_2mortal (newSViv (wcount)));
4355 else
4356 {
4357 int i;
4358 EXTEND (SP, wcount);
4359 for (i = 1; i <= wcount; ++i)
4360 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4361 }
4362}
4363
4364MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4365
4366void
4367_may_delete (SV *sem, int count, unsigned int extra_refs)
4368 PPCODE:
4369{
4370 AV *av = (AV *)SvRV (sem);
4371
4372 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4373 && AvFILLp (av) == 0 /* no waiters, just count */
4374 && SvIV (AvARRAY (av)[0]) == count)
4375 XSRETURN_YES;
4376
4377 XSRETURN_NO;
4378}
4379
4380MODULE = Coro::State PACKAGE = Coro::Signal
4381
4382SV *
4383new (SV *klass)
4384 CODE:
4385 RETVAL = sv_bless (
4386 coro_waitarray_new (aTHX_ 0),
4387 GvSTASH (CvGV (cv))
4388 );
4389 OUTPUT:
4390 RETVAL
4391
4392void
4393wait (...)
4394 CODE:
4395 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4396
4397void
4398broadcast (SV *self)
4399 CODE:
4400{
4401 AV *av = (AV *)SvRV (self);
4402 coro_signal_wake (aTHX_ av, AvFILLp (av));
4403}
4404
4405void
4406send (SV *self)
4407 CODE:
4408{
4409 AV *av = (AV *)SvRV (self);
4410
4411 if (AvFILLp (av))
4412 coro_signal_wake (aTHX_ av, 1);
4413 else
4414 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4415}
4416
4417IV
4418awaited (SV *self)
4419 CODE:
4420 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4421 OUTPUT:
4422 RETVAL
4423
4424
4425MODULE = Coro::State PACKAGE = Coro::AnyEvent
4426
4427BOOT:
4428 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4429
4430void
4431_schedule (...)
4432 CODE:
4433{
4434 static int incede;
4435
4436 api_cede_notself (aTHX);
4437
4438 ++incede;
4439 while (coro_nready >= incede && api_cede (aTHX))
4440 ;
4441
4442 sv_setsv (sv_activity, &PL_sv_undef);
4443 if (coro_nready >= incede)
4444 {
4445 PUSHMARK (SP);
4446 PUTBACK;
4447 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4448 }
4449
4450 --incede;
4451}
4452
4453
4454MODULE = Coro::State PACKAGE = Coro::AIO
4455
4456void
4457_register (char *target, char *proto, SV *req)
4458 CODE:
4459{
4460 SV *req_cv = s_get_cv_croak (req);
4461 /* newXSproto doesn't return the CV on 5.8 */
4462 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4463 sv_setpv ((SV *)slf_cv, proto);
4464 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4465}
4466
4467MODULE = Coro::State PACKAGE = Coro::Select
4468
4469void
4470patch_pp_sselect ()
4471 CODE:
4472 if (!coro_old_pp_sselect)
4473 {
4474 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4475 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4476 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4477 }
4478
4479void
4480unpatch_pp_sselect ()
4481 CODE:
4482 if (coro_old_pp_sselect)
4483 {
4484 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4485 coro_old_pp_sselect = 0;
4486 }
4487
4488MODULE = Coro::State PACKAGE = Coro::Util
4489
4490void
4491_exit (int code)
4492 CODE:
4493 _exit (code);
4494
4495NV
4496time ()
4497 CODE:
4498 RETVAL = nvtime (aTHX);
4499 OUTPUT:
4500 RETVAL
4501
4502NV
4503gettimeofday ()
4504 PPCODE:
4505{
4506 UV tv [2];
4507 u2time (aTHX_ tv);
4508 EXTEND (SP, 2);
4509 PUSHs (sv_2mortal (newSVuv (tv [0])));
4510 PUSHs (sv_2mortal (newSVuv (tv [1])));
4511}
4512

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