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Comparing Coro/Coro/State.xs (file contents):
Revision 1.164 by root, Tue Sep 25 01:47:23 2007 UTC vs.
Revision 1.448 by root, Thu Jun 4 22:58:28 2015 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 SVs_PADSTALE
16# include <unistd.h> 28# define SVs_PADSTALE 0
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#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
24# endif 39# endif
25# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
29static long pagesize; 44# define PadMAX AvFILLp
30# else 45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 46#endif
47#ifndef PadnamelistREFCNT
48# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
49#endif
50#ifndef PadnamelistREFCNT_dec
51# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
52#endif
53
54/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
55/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
56#if PERL_VERSION_ATLEAST(5,19,0)
57# define SVt_BIND SVt_IV
58#endif
59
60#if defined(_WIN32)
61# undef HAS_GETTIMEOFDAY
62# undef setjmp
63# undef longjmp
64# undef _exit
65# define setjmp _setjmp /* deep magic */
33#else 66#else
34# define PAGESIZE 0 67# 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 68#endif
44 69
45/* the maximum number of idle cctx that will be pooled */ 70/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 71static int cctx_max_idle = 4;
47 72
48#define PERL_VERSION_ATLEAST(a,b,c) \ 73#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 74# 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 75#endif
87 76
88/* prefer perl internal functions over our own? */ 77/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 78#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 79# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 80#endif
92 81
93/* The next macros try to return the current stack pointer, in an as 82/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 83 * 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 84#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 85# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 86# define STACKLEVEL __builtin_frame_address (0)
103#else 87#else
104# define attribute(x) 88# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 89# define STACKLEVEL ((void *)&stacklevel)
106#endif 90#endif
107 91
108#define NOINLINE attribute ((noinline)) 92#define IN_DESTRUCT PL_dirty
109 93
110#include "CoroAPI.h" 94#include "CoroAPI.h"
95#define GCoroAPI (&coroapi) /* very sneaky */
111 96
112#ifdef USE_ITHREADS 97#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 98# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 99static 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 100# endif
101#endif
120 102
121/* helper storage struct for Coro::AIO */ 103#ifdef __linux
122struct io_state 104# include <time.h> /* for timespec */
123{ 105# include <syscall.h> /* for SYS_* */
124 int errorno; 106# ifdef SYS_clock_gettime
125 I32 laststype; 107# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 108# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 109# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 110# endif
111#endif
129 112
113static double (*nvtime)(); /* so why doesn't it take void? */
114static void (*u2time)(pTHX_ UV ret[2]);
115
116/* we hijack an hopefully unused CV flag for our purposes */
117#define CVf_SLF 0x4000
118static OP *pp_slf (pTHX);
119static void slf_destroy (pTHX_ struct coro *coro);
120
121static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 122static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 123static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 124static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 125static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 126static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 127static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
128
129static AV *av_destroy; /* destruction queue */
130static SV *sv_manager; /* the manager coro */
131static SV *sv_idle; /* $Coro::idle */
132
133static GV *irsgv; /* $/ */
134static GV *stdoutgv; /* *STDOUT */
135static SV *rv_diehook;
136static SV *rv_warnhook;
137static HV *hv_sig; /* %SIG */
136 138
137/* async_pool helper stuff */ 139/* async_pool helper stuff */
138static SV *sv_pool_rss; 140static SV *sv_pool_rss;
139static SV *sv_pool_size; 141static SV *sv_pool_size;
142static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 143static AV *av_async_pool; /* idle pool */
144static SV *sv_Coro; /* class string */
145static CV *cv_pool_handler;
146
147/* Coro::AnyEvent */
148static SV *sv_activity;
149
150/* enable processtime/realtime profiling */
151static char enable_times;
152typedef U32 coro_ts[2];
153static coro_ts time_real, time_cpu;
154static char times_valid;
141 155
142static struct coro_cctx *cctx_first; 156static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 157static int cctx_count, cctx_idle;
144 158
159enum
160{
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
168
145/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
146typedef struct coro_cctx { 170typedef struct coro_cctx
171{
147 struct coro_cctx *next; 172 struct coro_cctx *next;
148 173
149 /* the stack */ 174 /* the stack */
150 void *sptr; 175 struct coro_stack stack;
151 size_t ssize;
152 176
153 /* cpu state */ 177 /* cpu state */
154 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 178 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
179#ifndef NDEBUG
155 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 180 JMPENV *idle_te; /* same as idle_sp, but for top_env */
181#endif
156 JMPENV *top_env; 182 JMPENV *top_env;
157 coro_context cctx; 183 coro_context cctx;
158 184
185 U32 gen;
159#if CORO_USE_VALGRIND 186#if CORO_USE_VALGRIND
160 int valgrind_id; 187 int valgrind_id;
161#endif 188#endif
162 char inuse, mapped; 189 unsigned char flags;
163} coro_cctx; 190} coro_cctx;
164 191
192static coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
196static MGVTBL coro_state_vtbl;
197
165enum { 198enum
199{
166 CF_RUNNING = 0x0001, /* coroutine is running */ 200 CF_RUNNING = 0x0001, /* coroutine is running */
167 CF_READY = 0x0002, /* coroutine is ready */ 201 CF_READY = 0x0002, /* coroutine is ready */
168 CF_NEW = 0x0004, /* has never been switched to */ 202 CF_NEW = 0x0004, /* has never been switched to */
169 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 203 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
204 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
205 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
170}; 206};
171 207
208/* the structure where most of the perl state is stored, overlaid on the cxstack */
209typedef struct
210{
211 #define VARx(name,expr,type) type name;
212 #include "state.h"
213} perl_slots;
214
215/* how many context stack entries do we need for perl_slots */
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217
172/* this is a structure representing a perl-level coroutine */ 218/* this is a structure representing a perl-level coroutine */
173struct coro { 219struct coro
220{
174 /* the c coroutine allocated to this perl coroutine, if any */ 221 /* the C coroutine allocated to this perl coroutine, if any */
175 coro_cctx *cctx; 222 coro_cctx *cctx;
176 223
224 /* ready queue */
225 struct coro *next_ready;
226
227 /* state data */
228 struct CoroSLF slf_frame; /* saved slf frame */
229 AV *mainstack;
230 perl_slots *slot; /* basically the saved sp */
231
232 CV *startcv; /* the CV to execute */
177 /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
178 AV *args;
179 int refcnt;
180 int save; /* CORO_SAVE flags */
181 int flags; /* CF_ flags */ 234 int flags; /* CF_ flags */
235 HV *hv; /* the perl hash associated with this coro, if any */
182 236
183 /* optionally saved, might be zero */ 237 /* statistics */
184 AV *defav; /* @_ */ 238 int usecount; /* number of transfers to this coro */
185 SV *defsv; /* $_ */
186 SV *errsv; /* $@ */
187 GV *deffh; /* default filehandle */
188 SV *irssv; /* $/ */
189 SV *irssv_sv; /* real $/ cache */
190
191#define VAR(name,type) type name;
192# include "state.h"
193#undef VAR
194 239
195 /* coro process data */ 240 /* coro process data */
196 int prio; 241 int prio;
242 SV *except; /* exception to be thrown */
243 SV *rouse_cb; /* last rouse callback */
244 AV *on_destroy; /* callbacks or coros to notify on destroy */
245 AV *status; /* the exit status list */
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* swap_sv */
257 AV *swap_sv;
258
259 /* times */
260 coro_ts t_cpu, t_real;
197 261
198 /* linked list */ 262 /* linked list */
199 struct coro *next, *prev; 263 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 264};
202 265
203typedef struct coro *Coro__State; 266typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 267typedef struct coro *Coro__State_or_hashref;
205 268
269/* the following variables are effectively part of the perl context */
270/* and get copied between struct coro and these variables */
271/* the main reason we don't support windows process emulation */
272static struct CoroSLF slf_frame; /* the current slf frame */
273
206/** Coro ********************************************************************/ 274/** Coro ********************************************************************/
207 275
208#define PRIO_MAX 3 276#define CORO_PRIO_MAX 3
209#define PRIO_HIGH 1 277#define CORO_PRIO_HIGH 1
210#define PRIO_NORMAL 0 278#define CORO_PRIO_NORMAL 0
211#define PRIO_LOW -1 279#define CORO_PRIO_LOW -1
212#define PRIO_IDLE -3 280#define CORO_PRIO_IDLE -3
213#define PRIO_MIN -4 281#define CORO_PRIO_MIN -4
214 282
215/* for Coro.pm */ 283/* for Coro.pm */
216static SV *coro_current; 284static SV *coro_current;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 285static SV *coro_readyhook;
218static int coro_nready; 286static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
287static CV *cv_coro_run;
219static struct coro *coro_first; 288static struct coro *coro_first;
289#define coro_nready coroapi.nready
290
291/** JIT *********************************************************************/
292
293#if CORO_JIT
294 /* APPLE doesn't have mmap though */
295 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
296 #ifndef CORO_JIT_TYPE
297 #if ECB_AMD64 && CORO_JIT_UNIXY
298 #define CORO_JIT_TYPE "amd64-unix"
299 #elif __i386 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "x86-unix"
301 #endif
302 #endif
303#endif
304
305#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
306 #undef CORO_JIT
307#endif
308
309#if CORO_JIT
310 typedef void (*load_save_perl_slots_type)(perl_slots *);
311 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
312#endif
313
314/** Coro::Select ************************************************************/
315
316static OP *(*coro_old_pp_sselect) (pTHX);
317static SV *coro_select_select;
318
319/* horrible hack, but if it works... */
320static OP *
321coro_pp_sselect (pTHX)
322{
323 dSP;
324 PUSHMARK (SP - 4); /* fake argument list */
325 XPUSHs (coro_select_select);
326 PUTBACK;
327
328 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
329 PL_op->op_flags |= OPf_STACKED;
330 PL_op->op_private = 0;
331 return PL_ppaddr [OP_ENTERSUB](aTHX);
332}
333
334/** time stuff **************************************************************/
335
336#ifdef HAS_GETTIMEOFDAY
337
338ecb_inline void
339coro_u2time (pTHX_ UV ret[2])
340{
341 struct timeval tv;
342 gettimeofday (&tv, 0);
343
344 ret [0] = tv.tv_sec;
345 ret [1] = tv.tv_usec;
346}
347
348ecb_inline double
349coro_nvtime (void)
350{
351 struct timeval tv;
352 gettimeofday (&tv, 0);
353
354 return tv.tv_sec + tv.tv_usec * 1e-6;
355}
356
357ecb_inline void
358time_init (pTHX)
359{
360 nvtime = coro_nvtime;
361 u2time = coro_u2time;
362}
363
364#else
365
366ecb_inline void
367time_init (pTHX)
368{
369 SV **svp;
370
371 require_pv ("Time/HiRes.pm");
372
373 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
374
375 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
376 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
377
378 nvtime = INT2PTR (double (*)(), SvIV (*svp));
379
380 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
381 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
382}
383
384#endif
220 385
221/** lowlevel stuff **********************************************************/ 386/** lowlevel stuff **********************************************************/
222 387
223static AV * 388static SV * ecb_noinline
389coro_get_sv (pTHX_ const char *name, int create)
390{
391#if PERL_VERSION_ATLEAST (5,10,0)
392 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
393 get_sv (name, create);
394#endif
395 return get_sv (name, create);
396}
397
398static AV * ecb_noinline
399coro_get_av (pTHX_ const char *name, int create)
400{
401#if PERL_VERSION_ATLEAST (5,10,0)
402 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
403 get_av (name, create);
404#endif
405 return get_av (name, create);
406}
407
408static HV * ecb_noinline
409coro_get_hv (pTHX_ const char *name, int create)
410{
411#if PERL_VERSION_ATLEAST (5,10,0)
412 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
413 get_hv (name, create);
414#endif
415 return get_hv (name, create);
416}
417
418ecb_inline void
419coro_times_update (void)
420{
421#ifdef coro_clock_gettime
422 struct timespec ts;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
426 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
427
428 ts.tv_sec = ts.tv_nsec = 0;
429 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
430 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
431#else
432 dTHX;
433 UV tv[2];
434
435 u2time (aTHX_ tv);
436 time_real [0] = tv [0];
437 time_real [1] = tv [1] * 1000;
438#endif
439}
440
441ecb_inline void
442coro_times_add (struct coro *c)
443{
444 c->t_real [1] += time_real [1];
445 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
446 c->t_real [0] += time_real [0];
447
448 c->t_cpu [1] += time_cpu [1];
449 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
450 c->t_cpu [0] += time_cpu [0];
451}
452
453ecb_inline void
454coro_times_sub (struct coro *c)
455{
456 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
457 c->t_real [1] -= time_real [1];
458 c->t_real [0] -= time_real [0];
459
460 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
461 c->t_cpu [1] -= time_cpu [1];
462 c->t_cpu [0] -= time_cpu [0];
463}
464
465/*****************************************************************************/
466/* magic glue */
467
468#define CORO_MAGIC_type_cv 26
469#define CORO_MAGIC_type_state PERL_MAGIC_ext
470
471#define CORO_MAGIC_NN(sv, type) \
472 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
473 ? SvMAGIC (sv) \
474 : mg_find (sv, type))
475
476#define CORO_MAGIC(sv, type) \
477 (ecb_expect_true (SvMAGIC (sv)) \
478 ? CORO_MAGIC_NN (sv, type) \
479 : 0)
480
481#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
482#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
483
484ecb_inline MAGIC *
485SvSTATEhv_p (pTHX_ SV *coro)
486{
487 MAGIC *mg;
488
489 if (ecb_expect_true (
490 SvTYPE (coro) == SVt_PVHV
491 && (mg = CORO_MAGIC_state (coro))
492 && mg->mg_virtual == &coro_state_vtbl
493 ))
494 return mg;
495
496 return 0;
497}
498
499ecb_inline struct coro *
500SvSTATE_ (pTHX_ SV *coro)
501{
502 MAGIC *mg;
503
504 if (SvROK (coro))
505 coro = SvRV (coro);
506
507 mg = SvSTATEhv_p (aTHX_ coro);
508 if (!mg)
509 croak ("Coro::State object required");
510
511 return (struct coro *)mg->mg_ptr;
512}
513
514#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
515
516/* faster than SvSTATE, but expects a coroutine hv */
517#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
518#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
519
520/*****************************************************************************/
521/* padlist management and caching */
522
523ecb_inline PADLIST *
224coro_clone_padlist (pTHX_ CV *cv) 524coro_derive_padlist (pTHX_ CV *cv)
225{ 525{
226 AV *padlist = CvPADLIST (cv); 526 PADLIST *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 527 PADLIST *newpadlist;
528 PADNAMELIST *padnames;
529 PAD *newpad;
530 PADOFFSET off = PadlistMAX (padlist) + 1;
228 531
229 newpadlist = newAV (); 532#if NEWPADAPI
533
534 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
535 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
536 while (!PadlistARRAY (padlist)[off - 1])
537 --off;
538
539 Perl_pad_push (aTHX_ padlist, off);
540
541 newpad = PadlistARRAY (padlist)[off];
542 PadlistARRAY (padlist)[off] = 0;
543
544#else
545
546#if PERL_VERSION_ATLEAST (5,10,0)
547 Perl_pad_push (aTHX_ padlist, off);
548#else
549 Perl_pad_push (aTHX_ padlist, off, 1);
550#endif
551
552 newpad = PadlistARRAY (padlist)[off];
553 PadlistMAX (padlist) = off - 1;
554
555#endif
556
557 newPADLIST (newpadlist);
558#if !PERL_VERSION_ATLEAST(5,15,3)
559 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
230 AvREAL_off (newpadlist); 560 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0)
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
233#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif 561#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist);
238 562
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 563 /* Already extended to 2 elements by newPADLIST. */
240 av_store (newpadlist, 1, (SV *)newpad); 564 PadlistMAX (newpadlist) = 1;
565
566 padnames = PadlistNAMES (padlist);
567 ++PadnamelistREFCNT (padnames);
568 PadlistNAMES (newpadlist) = padnames;
569
570 PadlistARRAY (newpadlist)[1] = newpad;
241 571
242 return newpadlist; 572 return newpadlist;
243} 573}
244 574
245static void 575ecb_inline void
246free_padlist (pTHX_ AV *padlist) 576free_padlist (pTHX_ PADLIST *padlist)
247{ 577{
248 /* may be during global destruction */ 578 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 579 if (!IN_DESTRUCT)
250 { 580 {
251 I32 i = AvFILLp (padlist); 581 I32 i = PadlistMAX (padlist);
252 while (i >= 0) 582
583 while (i > 0) /* special-case index 0 */
253 { 584 {
254 SV **svp = av_fetch (padlist, i--, FALSE); 585 /* we try to be extra-careful here */
586 PAD *pad = PadlistARRAY (padlist)[i--];
587
255 if (svp) 588 if (pad)
256 { 589 {
257 SV *sv; 590 I32 j = PadMAX (pad);
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 591
592 while (j >= 0)
259 SvREFCNT_dec (sv); 593 SvREFCNT_dec (PadARRAY (pad)[j--]);
260 594
595 PadMAX (pad) = -1;
261 SvREFCNT_dec (*svp); 596 SvREFCNT_dec (pad);
262 } 597 }
263 } 598 }
264 599
600 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
601
602#if NEWPADAPI
603 Safefree (PadlistARRAY (padlist));
604 Safefree (padlist);
605#else
606 AvFILLp (padlist) = -1;
607 AvREAL_off (padlist);
265 SvREFCNT_dec ((SV*)padlist); 608 SvREFCNT_dec ((SV*)padlist);
609#endif
266 } 610 }
267} 611}
268 612
269static int 613static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 614coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 615{
272 AV *padlist; 616 PADLIST *padlist;
273 AV *av = (AV *)mg->mg_obj; 617 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
618 size_t len = *(size_t *)mg->mg_ptr;
274 619
275 /* casting is fun. */ 620 /* perl manages to free our internal AV and _then_ call us */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 621 if (IN_DESTRUCT)
622 return 0;
623
624 while (len--)
277 free_padlist (aTHX_ padlist); 625 free_padlist (aTHX_ padlists[len]);
278
279 SvREFCNT_dec (av);
280 626
281 return 0; 627 return 0;
282} 628}
283 629
284#define PERL_MAGIC_coro PERL_MAGIC_ext 630static MGVTBL coro_cv_vtbl = {
285 631 0, 0, 0, 0,
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 632 coro_cv_free
287 633};
288#define CORO_MAGIC(cv) \
289 SvMAGIC (cv) \
290 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
291 ? SvMAGIC (cv) \
292 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
293 : 0
294 634
295/* the next two functions merely cache the padlists */ 635/* the next two functions merely cache the padlists */
296static void 636ecb_inline void
297get_padlist (pTHX_ CV *cv) 637get_padlist (pTHX_ CV *cv)
298{ 638{
299 MAGIC *mg = CORO_MAGIC (cv); 639 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 640 size_t *lenp;
301 641
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 642 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 643 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
304 else 644 else
305 { 645 {
306#if CORO_PREFER_PERL_FUNCTIONS 646#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 647 /* this is probably cleaner? but also slower! */
648 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 649 CV *cp = Perl_cv_clone (aTHX_ cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 650 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 651 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 652 SvREFCNT_dec (cp);
312#else 653#else
313 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 654 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
314#endif 655#endif
315 } 656 }
316} 657}
317 658
318static void 659ecb_inline void
319put_padlist (pTHX_ CV *cv) 660put_padlist (pTHX_ CV *cv)
320{ 661{
321 MAGIC *mg = CORO_MAGIC (cv); 662 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av;
323 663
324 if (!mg) 664 if (ecb_expect_false (!mg))
325 {
326 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
327 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
328 mg->mg_virtual = &vtbl_coro;
329 mg->mg_obj = (SV *)newAV ();
330 } 665 {
666 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
667 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
668 mg->mg_len = 1; /* so mg_free frees mg_ptr */
669 }
670 else
671 Renew (mg->mg_ptr,
672 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
673 char);
331 674
332 av = (AV *)mg->mg_obj; 675 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
333
334 if (AvFILLp (av) >= AvMAX (av))
335 av_extend (av, AvMAX (av) + 1);
336
337 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338} 676}
339 677
340/** load & save, init *******************************************************/ 678/** load & save, init *******************************************************/
341 679
342#define SB do { 680ecb_inline void
343#define SE } while (0) 681swap_sv (SV *a, SV *b)
682{
683 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
684 SV tmp;
344 685
345#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 686 /* swap sv_any */
687 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
688
689 /* swap sv_flags */
690 SvFLAGS (&tmp) = SvFLAGS (a);
691 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
692 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
693
694#if PERL_VERSION_ATLEAST (5,10,0)
695 /* perl 5.10 and later complicates this _quite_ a bit, but it also
696 * is much faster, so no quarrels here. alternatively, we could
697 * sv_upgrade to avoid this.
698 */
699 {
700 /* swap sv_u */
701 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
702
703 /* if SvANY points to the head, we need to adjust the pointers,
704 * as the pointer for a still points to b, and maybe vice versa.
705 */
706 #define svany_in_head(type) \
707 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
708
709 if (svany_in_head (SvTYPE (a)))
710 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
711
712 if (svany_in_head (SvTYPE (b)))
713 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
714 }
715#endif
716}
717
718/* swap sv heads, at least logically */
719static void
720swap_svs (pTHX_ Coro__State c)
721{
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
725 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
726}
727
728#define SWAP_SVS(coro) \
729 if (ecb_expect_false ((coro)->swap_sv)) \
730 swap_svs (aTHX_ (coro))
731
732static void
733on_enterleave_call (pTHX_ SV *cb);
346 734
347static void 735static void
348load_perl (pTHX_ Coro__State c) 736load_perl (pTHX_ Coro__State c)
349{ 737{
350#define VAR(name,type) PL_ ## name = c->name; 738 perl_slots *slot = c->slot;
739 c->slot = 0;
740
741 PL_mainstack = c->mainstack;
742
743#if CORO_JIT
744 load_perl_slots (slot);
745#else
746 #define VARx(name,expr,type) expr = slot->name;
351# include "state.h" 747 #include "state.h"
352#undef VAR 748#endif
353
354 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
355 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
356 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
357 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
358
359 if (c->irssv)
360 {
361 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
362 {
363 SvREFCNT_dec (c->irssv);
364 c->irssv = 0;
365 }
366 else
367 {
368 REPLACE_SV (PL_rs, c->irssv);
369 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
370 sv_setsv (c->irssv_sv, PL_rs);
371 }
372 }
373 749
374 { 750 {
375 dSP; 751 dSP;
752
376 CV *cv; 753 CV *cv;
377 754
378 /* now do the ugly restore mess */ 755 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 756 while (ecb_expect_true (cv = (CV *)POPs))
380 { 757 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 758 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 759 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 760 CvPADLIST (cv) = (PADLIST *)POPs;
384 } 761 }
385 762
386 PUTBACK; 763 PUTBACK;
387 } 764 }
765
766 slf_frame = c->slf_frame;
767 CORO_THROW = c->except;
768
769 if (ecb_expect_false (enable_times))
770 {
771 if (ecb_expect_false (!times_valid))
772 coro_times_update ();
773
774 coro_times_sub (c);
775 }
776
777 if (ecb_expect_false (c->on_enter))
778 {
779 int i;
780
781 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
782 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
783 }
784
785 SWAP_SVS (c);
388} 786}
389 787
390static void 788static void
391save_perl (pTHX_ Coro__State c) 789save_perl (pTHX_ Coro__State c)
392{ 790{
791 SWAP_SVS (c);
792
793 if (ecb_expect_false (c->on_leave))
794 {
795 int i;
796
797 for (i = AvFILLp (c->on_leave); i >= 0; --i)
798 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
799 }
800
801 times_valid = 0;
802
803 if (ecb_expect_false (enable_times))
804 {
805 coro_times_update (); times_valid = 1;
806 coro_times_add (c);
807 }
808
809 c->except = CORO_THROW;
810 c->slf_frame = slf_frame;
811
393 { 812 {
394 dSP; 813 dSP;
395 I32 cxix = cxstack_ix; 814 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 815 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 816 PERL_SI *top_si = PL_curstackinfo;
… …
403 822
404 XPUSHs (Nullsv); 823 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 824 /* this loop was inspired by pp_caller */
406 for (;;) 825 for (;;)
407 { 826 {
408 while (cxix >= 0) 827 while (ecb_expect_true (cxix >= 0))
409 { 828 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 829 PERL_CONTEXT *cx = &ccstk[cxix--];
411 830
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 831 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
413 { 832 {
414 CV *cv = cx->blk_sub.cv; 833 CV *cv = cx->blk_sub.cv;
415 834
416 if (CvDEPTH (cv)) 835 if (ecb_expect_true (CvDEPTH (cv)))
417 { 836 {
418 EXTEND (SP, 3); 837 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 838 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 839 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 840 PUSHs ((SV *)cv);
422 841
423 CvDEPTH (cv) = 0; 842 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 843 get_padlist (aTHX_ cv);
425 } 844 }
426 } 845 }
427 } 846 }
428 847
429 if (top_si->si_type == PERLSI_MAIN) 848 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 849 break;
431 850
432 top_si = top_si->si_prev; 851 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 852 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 853 cxix = top_si->si_cxix;
435 } 854 }
436 855
437 PUTBACK; 856 PUTBACK;
438 } 857 }
439 858
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 859 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 860 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 861 {
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 862 unsigned int i;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
445 863
446#define VAR(name,type)c->name = PL_ ## name; 864 for (i = 0; i < SLOT_COUNT; ++i)
865 CXINC;
866
867 cxstack_ix -= SLOT_COUNT; /* undo allocation */
868 }
869
870 c->mainstack = PL_mainstack;
871
872 {
873 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
874
875#if CORO_JIT
876 save_perl_slots (slot);
877#else
878 #define VARx(name,expr,type) slot->name = expr;
447# include "state.h" 879 #include "state.h"
448#undef VAR 880#endif
881 }
449} 882}
450 883
451/* 884/*
452 * allocate various perl stacks. This is an exact copy 885 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 886 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 887 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 888 * not usually need a lot of stackspace.
456 */ 889 */
457#if CORO_PREFER_PERL_FUNCTIONS 890#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 891# define coro_init_stacks(thx) init_stacks ()
459#else 892#else
460static void 893static void
461coro_init_stacks (pTHX) 894coro_init_stacks (pTHX)
462{ 895{
463 PL_curstackinfo = new_stackinfo(64, 6); 896 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
464 PL_curstackinfo->si_type = PERLSI_MAIN; 897 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 898 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 899 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 900
468 PL_stack_base = AvARRAY(PL_curstack); 901 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 902 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 903 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 904
472 New(50,PL_tmps_stack,64,SV*); 905 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 906 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 907 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 908 PL_tmps_max = 32;
476 909
477 New(54,PL_markstack,16,I32); 910 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 911 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 912 PL_markstack_max = PL_markstack + 16;
480 913
481#ifdef SET_MARK_OFFSET 914#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 915 SET_MARK_OFFSET;
483#endif 916#endif
484 917
485 New(54,PL_scopestack,16,I32); 918 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 919 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 920 PL_scopestack_max = 8;
921#if HAS_SCOPESTACK_NAME
922 New(54,PL_scopestack_name,8,const char*);
923#endif
488 924
489 New(54,PL_savestack,64,ANY); 925 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 926 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 927 PL_savestack_max = 24;
492 928
493#if !PERL_VERSION_ATLEAST (5,9,0) 929#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 930 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 931 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 932 PL_retstack_max = 4;
497#endif 933#endif
498} 934}
… …
500 936
501/* 937/*
502 * destroy the stacks, the callchain etc... 938 * destroy the stacks, the callchain etc...
503 */ 939 */
504static void 940static void
505coro_destroy_stacks (pTHX) 941coro_destruct_stacks (pTHX)
506{ 942{
507 if (!IN_DESTRUCT)
508 {
509 /* restore all saved variables and stuff */
510 LEAVE_SCOPE (0);
511 assert (PL_tmps_floor == -1);
512
513 /* free all temporaries */
514 FREETMPS;
515 assert (PL_tmps_ix == -1);
516
517 /* unwind all extra stacks */
518 POPSTACK_TO (PL_mainstack);
519
520 /* unwind main stack */
521 dounwind (-1);
522 }
523
524 while (PL_curstackinfo->si_next) 943 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 944 PL_curstackinfo = PL_curstackinfo->si_next;
526 945
527 while (PL_curstackinfo) 946 while (PL_curstackinfo)
528 { 947 {
… …
537 } 956 }
538 957
539 Safefree (PL_tmps_stack); 958 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 959 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 960 Safefree (PL_scopestack);
961#if HAS_SCOPESTACK_NAME
962 Safefree (PL_scopestack_name);
963#endif
542 Safefree (PL_savestack); 964 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 965#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 966 Safefree (PL_retstack);
545#endif 967#endif
546} 968}
547 969
970#define CORO_RSS \
971 rss += sizeof (SYM (curstackinfo)); \
972 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
973 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
974 rss += SYM (tmps_max) * sizeof (SV *); \
975 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
976 rss += SYM (scopestack_max) * sizeof (I32); \
977 rss += SYM (savestack_max) * sizeof (ANY);
978
548static size_t 979static size_t
549coro_rss (struct coro *coro) 980coro_rss (pTHX_ struct coro *coro)
550{ 981{
551 size_t rss = sizeof (coro); 982 size_t rss = sizeof (*coro);
552 983
553 if (coro->mainstack) 984 if (coro->mainstack)
554 { 985 {
555 if (coro->flags & CF_RUNNING) 986 if (coro->flags & CF_RUNNING)
556 { 987 {
557 #define VAR(name,type)coro->name = PL_ ## name; 988 #define SYM(sym) PL_ ## sym
558 # include "state.h" 989 CORO_RSS;
559 #undef VAR 990 #undef SYM
560 } 991 }
561 992 else
562 rss += sizeof (coro->curstackinfo); 993 {
563 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 994 #define SYM(sym) coro->slot->sym
564 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 995 CORO_RSS;
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 996 #undef SYM
566 rss += coro->tmps_max * sizeof (SV *); 997 }
567 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
568 rss += coro->scopestack_max * sizeof (I32);
569 rss += coro->savestack_max * sizeof (ANY);
570
571#if !PERL_VERSION_ATLEAST (5,9,0)
572 rss += coro->retstack_max * sizeof (OP *);
573#endif
574 } 998 }
575 999
576 return rss; 1000 return rss;
577} 1001}
578 1002
579/** coroutine stack handling ************************************************/ 1003/** coroutine stack handling ************************************************/
580 1004
1005static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1006static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1007static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1008
1009/* apparently < 5.8.8 */
1010#ifndef MgPV_nolen_const
1011#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1012 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1013 (const char*)(mg)->mg_ptr)
1014#endif
1015
1016/*
1017 * This overrides the default magic get method of %SIG elements.
1018 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1019 * and instead of trying to save and restore the hash elements (extremely slow),
1020 * we just provide our own readback here.
1021 */
1022static int ecb_cold
1023coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1024{
1025 const char *s = MgPV_nolen_const (mg);
1026
1027 if (*s == '_')
1028 {
1029 SV **svp = 0;
1030
1031 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1032 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1033
1034 if (svp)
1035 {
1036 SV *ssv;
1037
1038 if (!*svp)
1039 ssv = &PL_sv_undef;
1040 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1041 ssv = sv_2mortal (newRV_inc (*svp));
1042 else
1043 ssv = *svp;
1044
1045 sv_setsv (sv, ssv);
1046 return 0;
1047 }
1048 }
1049
1050 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1051}
1052
1053static int ecb_cold
1054coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1055{
1056 const char *s = MgPV_nolen_const (mg);
1057
1058 if (*s == '_')
1059 {
1060 SV **svp = 0;
1061
1062 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1063 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1064
1065 if (svp)
1066 {
1067 SV *old = *svp;
1068 *svp = 0;
1069 SvREFCNT_dec (old);
1070 return 0;
1071 }
1072 }
1073
1074 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1075}
1076
1077static int ecb_cold
1078coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1079{
1080 const char *s = MgPV_nolen_const (mg);
1081
1082 if (*s == '_')
1083 {
1084 SV **svp = 0;
1085
1086 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1087 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1088
1089 if (svp)
1090 {
1091 SV *old = *svp;
1092 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1093 SvREFCNT_dec (old);
1094 return 0;
1095 }
1096 }
1097
1098 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1099}
1100
1101static void
1102prepare_nop (pTHX_ struct coro_transfer_args *ta)
1103{
1104 /* kind of mega-hacky, but works */
1105 ta->next = ta->prev = (struct coro *)ta;
1106}
1107
581static void 1108static int
1109slf_check_nop (pTHX_ struct CoroSLF *frame)
1110{
1111 return 0;
1112}
1113
1114static int
1115slf_check_repeat (pTHX_ struct CoroSLF *frame)
1116{
1117 return 1;
1118}
1119
1120static UNOP init_perl_op;
1121
1122ecb_noinline static void /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 1123init_perl (pTHX_ struct coro *coro)
583{ 1124{
584 /* 1125 /*
585 * emulate part of the perl startup here. 1126 * emulate part of the perl startup here.
586 */ 1127 */
587 coro_init_stacks (aTHX); 1128 coro_init_stacks (aTHX);
588 1129
1130 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 1131 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 1132 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 1133 PL_comppad = 0;
1134 PL_comppad_name = 0;
1135 PL_comppad_name_fill = 0;
1136 PL_comppad_name_floor = 0;
592 PL_curpm = 0; 1137 PL_curpm = 0;
1138 PL_curpad = 0;
593 PL_localizing = 0; 1139 PL_localizing = 0;
594 PL_dirty = 0;
595 PL_restartop = 0; 1140 PL_restartop = 0;
1141#if PERL_VERSION_ATLEAST (5,10,0)
1142 PL_parser = 0;
1143#endif
1144 PL_hints = 0;
1145
1146 /* recreate the die/warn hooks */
1147 PL_diehook = SvREFCNT_inc (rv_diehook);
1148 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1149
1150 GvSV (PL_defgv) = newSV (0);
1151 GvAV (PL_defgv) = coro->args; coro->args = 0;
1152 GvSV (PL_errgv) = newSV (0);
1153 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1154 GvHV (PL_hintgv) = newHV ();
1155#if PERL_VERSION_ATLEAST (5,10,0)
1156 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1157#endif
1158 PL_rs = newSVsv (GvSV (irsgv));
1159 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 1160
597 { 1161 {
598 dSP; 1162 dSP;
599 LOGOP myop; 1163 UNOP myop;
600 1164
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 1165 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 1166 myop.op_next = Nullop;
1167 myop.op_type = OP_ENTERSUB;
606 myop.op_flags = OPf_WANT_VOID; 1168 myop.op_flags = OPf_WANT_VOID;
607 1169
608 PUSHMARK (SP); 1170 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 1171 PUSHs ((SV *)coro->startcv);
610 PUTBACK; 1172 PUTBACK;
611 PL_op = (OP *)&myop; 1173 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1174 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN;
614 } 1175 }
615 1176
616 ENTER; /* necessary e.g. for dounwind */ 1177 /* this newly created coroutine might be run on an existing cctx which most
617} 1178 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1179 */
1180 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1181 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1182 slf_frame.destroy = 0;
618 1183
1184 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1185 init_perl_op.op_next = PL_op;
1186 init_perl_op.op_type = OP_ENTERSUB;
1187 init_perl_op.op_ppaddr = pp_slf;
1188 /* no flags etc. required, as an init function won't be called */
1189
1190 PL_op = (OP *)&init_perl_op;
1191
1192 /* copy throw, in case it was set before init_perl */
1193 CORO_THROW = coro->except;
1194
1195 SWAP_SVS (coro);
1196
1197 if (ecb_expect_false (enable_times))
1198 {
1199 coro_times_update ();
1200 coro_times_sub (coro);
1201 }
1202}
1203
619static void 1204static void
1205coro_unwind_stacks (pTHX)
1206{
1207 if (!IN_DESTRUCT)
1208 {
1209 /* restore all saved variables and stuff */
1210 LEAVE_SCOPE (0);
1211 assert (PL_tmps_floor == -1);
1212
1213 /* free all temporaries */
1214 FREETMPS;
1215 assert (PL_tmps_ix == -1);
1216
1217 /* unwind all extra stacks */
1218 POPSTACK_TO (PL_mainstack);
1219
1220 /* unwind main stack */
1221 dounwind (-1);
1222 }
1223}
1224
1225static void
1226destroy_perl (pTHX_ struct coro *coro)
1227{
1228 SV *svf [9];
1229
1230 {
1231 SV *old_current = SvRV (coro_current);
1232 struct coro *current = SvSTATE (old_current);
1233
1234 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1235
1236 save_perl (aTHX_ current);
1237
1238 /* this will cause transfer_check to croak on block*/
1239 SvRV_set (coro_current, (SV *)coro->hv);
1240
1241 load_perl (aTHX_ coro);
1242
1243 coro_unwind_stacks (aTHX);
1244
1245 /* restore swapped sv's */
1246 SWAP_SVS (coro);
1247
1248 coro_destruct_stacks (aTHX);
1249
1250 /* now save some sv's to be free'd later */
1251 svf [0] = GvSV (PL_defgv);
1252 svf [1] = (SV *)GvAV (PL_defgv);
1253 svf [2] = GvSV (PL_errgv);
1254 svf [3] = (SV *)PL_defoutgv;
1255 svf [4] = PL_rs;
1256 svf [5] = GvSV (irsgv);
1257 svf [6] = (SV *)GvHV (PL_hintgv);
1258 svf [7] = PL_diehook;
1259 svf [8] = PL_warnhook;
1260 assert (9 == sizeof (svf) / sizeof (*svf));
1261
1262 SvRV_set (coro_current, old_current);
1263
1264 load_perl (aTHX_ current);
1265 }
1266
1267 {
1268 unsigned int i;
1269
1270 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1271 SvREFCNT_dec (svf [i]);
1272
1273 SvREFCNT_dec (coro->saved_deffh);
1274 SvREFCNT_dec (coro->rouse_cb);
1275 SvREFCNT_dec (coro->invoke_cb);
1276 SvREFCNT_dec (coro->invoke_av);
1277 }
1278}
1279
1280ecb_inline void
620free_coro_mortal (pTHX) 1281free_coro_mortal (pTHX)
621{ 1282{
622 if (coro_mortal) 1283 if (ecb_expect_true (coro_mortal))
623 { 1284 {
624 SvREFCNT_dec (coro_mortal); 1285 SvREFCNT_dec ((SV *)coro_mortal);
625 coro_mortal = 0; 1286 coro_mortal = 0;
626 } 1287 }
627} 1288}
628 1289
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 1290static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 1291runops_trace (pTHX)
631/* during execution of a perl program */
632static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx)
634{ 1292{
635 dSP; 1293 COP *oldcop = 0;
636 LOGOP myop; 1294 int oldcxix = -2;
637 1295
638 Zero (&myop, 1, LOGOP); 1296 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
639 myop.op_next = PL_op; 1297 {
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1298 PERL_ASYNC_CHECK ();
641 1299
642 PUSHMARK (SP); 1300 if (cctx_current->flags & CC_TRACE_ALL)
643 EXTEND (SP, 2); 1301 {
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1302 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1303 {
646 PUTBACK; 1304 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
647 PL_op = (OP *)&myop; 1305 SV **bot, **top;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1306 AV *av = newAV (); /* return values */
649 SPAGAIN; 1307 SV **cb;
1308 dSP;
1309
1310 GV *gv = CvGV (cx->blk_sub.cv);
1311 SV *fullname = sv_2mortal (newSV (0));
1312 if (isGV (gv))
1313 gv_efullname3 (fullname, gv, 0);
1314
1315 bot = PL_stack_base + cx->blk_oldsp + 1;
1316 top = cx->blk_gimme == G_ARRAY ? SP + 1
1317 : cx->blk_gimme == G_SCALAR ? bot + 1
1318 : bot;
1319
1320 av_extend (av, top - bot);
1321 while (bot < top)
1322 av_push (av, SvREFCNT_inc_NN (*bot++));
1323
1324 PL_runops = RUNOPS_DEFAULT;
1325 ENTER;
1326 SAVETMPS;
1327 EXTEND (SP, 3);
1328 PUSHMARK (SP);
1329 PUSHs (&PL_sv_no);
1330 PUSHs (fullname);
1331 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1332 PUTBACK;
1333 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1334 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1335 SPAGAIN;
1336 FREETMPS;
1337 LEAVE;
1338 PL_runops = runops_trace;
1339 }
1340
1341 if (oldcop != PL_curcop)
1342 {
1343 oldcop = PL_curcop;
1344
1345 if (PL_curcop != &PL_compiling)
1346 {
1347 SV **cb;
1348
1349 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1350 {
1351 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1352
1353 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1354 {
1355 dSP;
1356 GV *gv = CvGV (cx->blk_sub.cv);
1357 SV *fullname = sv_2mortal (newSV (0));
1358
1359 if (isGV (gv))
1360 gv_efullname3 (fullname, gv, 0);
1361
1362 PL_runops = RUNOPS_DEFAULT;
1363 ENTER;
1364 SAVETMPS;
1365 EXTEND (SP, 3);
1366 PUSHMARK (SP);
1367 PUSHs (&PL_sv_yes);
1368 PUSHs (fullname);
1369 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1370 PUTBACK;
1371 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1372 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1373 SPAGAIN;
1374 FREETMPS;
1375 LEAVE;
1376 PL_runops = runops_trace;
1377 }
1378
1379 oldcxix = cxstack_ix;
1380 }
1381
1382 if (cctx_current->flags & CC_TRACE_LINE)
1383 {
1384 dSP;
1385
1386 PL_runops = RUNOPS_DEFAULT;
1387 ENTER;
1388 SAVETMPS;
1389 EXTEND (SP, 3);
1390 PL_runops = RUNOPS_DEFAULT;
1391 PUSHMARK (SP);
1392 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1393 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1394 PUTBACK;
1395 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1396 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1397 SPAGAIN;
1398 FREETMPS;
1399 LEAVE;
1400 PL_runops = runops_trace;
1401 }
1402 }
1403 }
1404 }
1405 }
1406
1407 TAINT_NOT;
1408 return 0;
1409}
1410
1411static struct CoroSLF cctx_ssl_frame;
1412
1413static void
1414slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1415{
1416 ta->prev = 0;
1417}
1418
1419static int
1420slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1421{
1422 *frame = cctx_ssl_frame;
1423
1424 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1425}
1426
1427/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1428static void ecb_noinline
1429cctx_prepare (pTHX)
1430{
1431 PL_top_env = &PL_start_env;
1432
1433 if (cctx_current->flags & CC_TRACE)
1434 PL_runops = runops_trace;
1435
1436 /* we already must be executing an SLF op, there is no other valid way
1437 * that can lead to creation of a new cctx */
1438 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1439 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1440
1441 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1442 cctx_ssl_frame = slf_frame;
1443
1444 slf_frame.prepare = slf_prepare_set_stacklevel;
1445 slf_frame.check = slf_check_set_stacklevel;
1446}
1447
1448/* the tail of transfer: execute stuff we can only do after a transfer */
1449ecb_inline void
1450transfer_tail (pTHX)
1451{
1452 free_coro_mortal (aTHX);
1453}
1454
1455/* try to exit the same way perl's main function would do */
1456/* we do not bother resetting the environment or other things *7
1457/* that are not, uhm, essential */
1458/* this obviously also doesn't work when perl is embedded */
1459static void ecb_noinline ecb_cold
1460perlish_exit (pTHX)
1461{
1462 int exitstatus = perl_destruct (PL_curinterp);
1463 perl_free (PL_curinterp);
1464 exit (exitstatus);
650} 1465}
651 1466
652/* 1467/*
653 * this is a _very_ stripped down perl interpreter ;) 1468 * this is a _very_ stripped down perl interpreter ;)
654 */ 1469 */
655static void 1470static void
656coro_run (void *arg) 1471cctx_run (void *arg)
657{ 1472{
1473#ifdef USE_ITHREADS
1474# if CORO_PTHREAD
1475 PERL_SET_CONTEXT (coro_thx);
1476# endif
1477#endif
1478 {
658 dTHX; 1479 dTHX;
659 1480
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1481 /* normally we would need to skip the entersub here */
661 UNLOCK; 1482 /* not doing so will re-execute it, which is exactly what we want */
1483 /* PL_nop = PL_nop->op_next */
662 1484
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1485 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1486 cctx_prepare (aTHX);
667 1487
1488 /* cctx_run is the alternative tail of transfer() */
1489 transfer_tail (aTHX);
1490
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1491 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1492 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1493 perl_run (PL_curinterp);
671
672 /* 1494 /*
1495 * Unfortunately, there is no way to get at the return values of the
1496 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1497 * runtime errors here, as this is just a random interpreter, not a thread.
1498 */
1499
1500 /*
673 * If perl-run returns we assume exit() was being called or the coro 1501 * If perl-run returns we assume exit() was being called or the coro
674 * fell off the end, which seems to be the only valid (non-bug) 1502 * fell off the end, which seems to be the only valid (non-bug)
675 * reason for perl_run to return. We try to exit by jumping to the 1503 * reason for perl_run to return. We try to mimic whatever perl is normally
676 * bootstrap-time "top" top_env, as we cannot restore the "main" 1504 * doing in that case. YMMV.
677 * coroutine as Coro has no such concept
678 */ 1505 */
679 PL_top_env = main_top_env; 1506 perlish_exit (aTHX);
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1507 }
681} 1508}
682 1509
683static coro_cctx * 1510static coro_cctx *
684cctx_new () 1511cctx_new (void)
685{ 1512{
686 coro_cctx *cctx; 1513 coro_cctx *cctx;
687 void *stack_start;
688 size_t stack_size;
689 1514
690 ++cctx_count; 1515 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx); 1516 New (0, cctx, 1, coro_cctx);
693 1517
694#if HAVE_MMAP 1518 cctx->gen = cctx_gen;
1519 cctx->flags = 0;
1520 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
695 1521
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1522 return cctx;
697 /* mmap supposedly does allocate-on-write for us */ 1523}
698 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1524
700 if (cctx->sptr != (void *)-1) 1525/* create a new cctx only suitable as source */
701 { 1526static coro_cctx *
702# if CORO_STACKGUARD 1527cctx_new_empty (void)
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1528{
704# endif 1529 coro_cctx *cctx = cctx_new ();
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1530
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1531 cctx->stack.sptr = 0;
707 cctx->mapped = 1; 1532 coro_create (&cctx->cctx, 0, 0, 0, 0);
1533
1534 return cctx;
1535}
1536
1537/* create a new cctx suitable as destination/running a perl interpreter */
1538static coro_cctx *
1539cctx_new_run (void)
1540{
1541 coro_cctx *cctx = cctx_new ();
1542
1543 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
708 } 1544 {
709 else
710#endif
711 {
712 cctx->ssize = coro_stacksize * (long)sizeof (long);
713 New (0, cctx->sptr, coro_stacksize, long);
714
715 if (!cctx->sptr)
716 {
717 perror ("FATAL: unable to allocate stack for coroutine"); 1545 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1546 _exit (EXIT_FAILURE);
719 }
720
721 stack_start = cctx->sptr;
722 stack_size = cctx->ssize;
723 } 1547 }
724 1548
725 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
726 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1549 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
727 1550
728 return cctx; 1551 return cctx;
729} 1552}
730 1553
731static void 1554static void
732cctx_destroy (coro_cctx *cctx) 1555cctx_destroy (coro_cctx *cctx)
733{ 1556{
734 if (!cctx) 1557 if (!cctx)
735 return; 1558 return;
736 1559
1560 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1561
737 --cctx_count; 1562 --cctx_count;
1563 coro_destroy (&cctx->cctx);
738 1564
739#if CORO_USE_VALGRIND 1565 coro_stack_free (&cctx->stack);
740 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
741#endif
742
743#if HAVE_MMAP
744 if (cctx->mapped)
745 munmap (cctx->sptr, cctx->ssize);
746 else
747#endif
748 Safefree (cctx->sptr);
749 1566
750 Safefree (cctx); 1567 Safefree (cctx);
751} 1568}
1569
1570/* wether this cctx should be destructed */
1571#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1572
753static coro_cctx * 1573static coro_cctx *
754cctx_get (pTHX) 1574cctx_get (pTHX)
755{ 1575{
756 while (cctx_first) 1576 while (ecb_expect_true (cctx_first))
757 { 1577 {
758 coro_cctx *cctx = cctx_first; 1578 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1579 cctx_first = cctx->next;
760 --cctx_idle; 1580 --cctx_idle;
761 1581
762 if (cctx->ssize >= coro_stacksize) 1582 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1583 return cctx;
764 1584
765 cctx_destroy (cctx); 1585 cctx_destroy (cctx);
766 } 1586 }
767 1587
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1588 return cctx_new_run ();
770} 1589}
771 1590
772static void 1591static void
773cctx_put (coro_cctx *cctx) 1592cctx_put (coro_cctx *cctx)
774{ 1593{
1594 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1595
775 /* free another cctx if overlimit */ 1596 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1597 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
777 { 1598 {
778 coro_cctx *first = cctx_first; 1599 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1600 cctx_first = first->next;
780 --cctx_idle; 1601 --cctx_idle;
781 1602
782 assert (!first->inuse);
783 cctx_destroy (first); 1603 cctx_destroy (first);
784 } 1604 }
785 1605
786 ++cctx_idle; 1606 ++cctx_idle;
787 cctx->next = cctx_first; 1607 cctx->next = cctx_first;
788 cctx_first = cctx; 1608 cctx_first = cctx;
789} 1609}
790 1610
791/** coroutine switching *****************************************************/ 1611/** coroutine switching *****************************************************/
792 1612
793/* never call directly, always through the coro_state_transfer global variable */ 1613static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1614transfer_check (pTHX_ struct coro *prev, struct coro *next)
1615{
1616 /* TODO: throwing up here is considered harmful */
1617
1618 if (ecb_expect_true (prev != next))
1619 {
1620 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1621 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1622
1623 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1624 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1625
1626#if !PERL_VERSION_ATLEAST (5,10,0)
1627 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1628 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1629#endif
1630 }
1631}
1632
1633/* always use the TRANSFER macro */
1634static void ecb_noinline /* noinline so we have a fixed stackframe */
1635transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1636{
797 dSTACKLEVEL; 1637 dSTACKLEVEL;
798 1638
799 /* sometimes transfer is only called to set idle_sp */ 1639 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1640 if (ecb_expect_false (!prev))
801 { 1641 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1642 cctx_current->idle_sp = STACKLEVEL;
803 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1643 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 }
805 else if (prev != next)
806 { 1644 }
1645 else if (ecb_expect_true (prev != next))
1646 {
807 coro_cctx *prev__cctx; 1647 coro_cctx *cctx_prev;
808 1648
809 if (prev->flags & CF_NEW) 1649 if (ecb_expect_false (prev->flags & CF_NEW))
810 { 1650 {
811 /* create a new empty context */ 1651 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx);
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1652 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1653 prev->flags |= CF_RUNNING;
816 } 1654 }
817 1655
818 /*TODO: must not croak here */
819 if (!prev->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
821
822 if (next->flags & CF_RUNNING)
823 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
824
825 if (next->flags & CF_DESTROYED)
826 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
827
828 prev->flags &= ~CF_RUNNING; 1656 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1657 next->flags |= CF_RUNNING;
830 1658
831 LOCK; 1659 /* first get rid of the old state */
1660 save_perl (aTHX_ prev);
832 1661
833 if (next->flags & CF_NEW) 1662 if (ecb_expect_false (next->flags & CF_NEW))
834 { 1663 {
835 /* need to start coroutine */ 1664 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1665 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1666 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1667 init_perl (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1668 }
844 else 1669 else
1670 load_perl (aTHX_ next);
1671
1672 /* possibly untie and reuse the cctx */
1673 if (ecb_expect_true (
1674 cctx_current->idle_sp == STACKLEVEL
1675 && !(cctx_current->flags & CC_TRACE)
1676 && !force_cctx
1677 ))
845 { 1678 {
846 /* coroutine already started */ 1679 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1680 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
848 load_perl (aTHX_ next); 1681
1682 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1683 /* without this the next cctx_get might destroy the running cctx while still in use */
1684 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1685 if (ecb_expect_true (!next->cctx))
1686 next->cctx = cctx_get (aTHX);
1687
1688 cctx_put (cctx_current);
849 } 1689 }
1690 else
1691 prev->cctx = cctx_current;
850 1692
851 prev__cctx = prev->cctx; 1693 ++next->usecount;
852 1694
853 /* possibly "free" the cctx */ 1695 cctx_prev = cctx_current;
854 if (prev__cctx->idle_sp == STACKLEVEL) 1696 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1697
1698 next->cctx = 0;
1699
1700 if (ecb_expect_false (cctx_prev != cctx_current))
855 { 1701 {
856 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1702 cctx_prev->top_env = PL_top_env;
857 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1703 PL_top_env = cctx_current->top_env;
858 1704 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
859 prev->cctx = 0;
860
861 cctx_put (prev__cctx);
862 prev__cctx->inuse = 0;
863 } 1705 }
864 1706
865 if (!next->cctx) 1707 transfer_tail (aTHX);
866 {
867 next->cctx = cctx_get (aTHX);
868 assert (!next->cctx->inuse);
869 next->cctx->inuse = 1;
870 }
871
872 if (prev__cctx != next->cctx)
873 {
874 prev__cctx->top_env = PL_top_env;
875 PL_top_env = next->cctx->top_env;
876 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877 }
878
879 free_coro_mortal (aTHX);
880 UNLOCK;
881 } 1708 }
882} 1709}
883 1710
884struct transfer_args 1711#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
885{
886 struct coro *prev, *next;
887};
888
889#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1712#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1713
891/** high level stuff ********************************************************/ 1714/** high level stuff ********************************************************/
892 1715
1716/* this function is actually Coro, not Coro::State, but we call it from here */
1717/* because it is convenient - but it hasn't been declared yet for that reason */
893static int 1718static void
1719coro_call_on_destroy (pTHX_ struct coro *coro);
1720
1721static void
894coro_state_destroy (pTHX_ struct coro *coro) 1722coro_state_destroy (pTHX_ struct coro *coro)
895{ 1723{
896 if (coro->flags & CF_DESTROYED) 1724 if (coro->flags & CF_ZOMBIE)
897 return 0; 1725 return;
898 1726
1727 slf_destroy (aTHX_ coro);
1728
899 coro->flags |= CF_DESTROYED; 1729 coro->flags |= CF_ZOMBIE;
900 1730
901 if (coro->flags & CF_READY) 1731 if (coro->flags & CF_READY)
902 { 1732 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1733 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1734 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1735 --coro_nready;
907 UNLOCK;
908 } 1736 }
909 else 1737 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1738 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
911
912 if (coro->mainstack && coro->mainstack != main_mainstack)
913 {
914 struct coro temp;
915
916 assert (!(coro->flags & CF_RUNNING));
917
918 Zero (&temp, 1, struct coro);
919 temp.save = CORO_SAVE_ALL;
920
921 if (coro->flags & CF_RUNNING)
922 croak ("FATAL: tried to destroy currently running coroutine");
923
924 save_perl (aTHX_ &temp);
925 load_perl (aTHX_ coro);
926
927 coro_destroy_stacks (aTHX);
928
929 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
930
931 coro->mainstack = 0;
932 }
933
934 cctx_destroy (coro->cctx);
935 SvREFCNT_dec (coro->args);
936 1739
937 if (coro->next) coro->next->prev = coro->prev; 1740 if (coro->next) coro->next->prev = coro->prev;
938 if (coro->prev) coro->prev->next = coro->next; 1741 if (coro->prev) coro->prev->next = coro->next;
939 if (coro == coro_first) coro_first = coro->next; 1742 if (coro == coro_first) coro_first = coro->next;
940 1743
941 return 1; 1744 if (coro->mainstack
1745 && coro->mainstack != main_mainstack
1746 && coro->slot
1747 && !PL_dirty)
1748 destroy_perl (aTHX_ coro);
1749
1750 cctx_destroy (coro->cctx);
1751 SvREFCNT_dec (coro->startcv);
1752 SvREFCNT_dec (coro->args);
1753 SvREFCNT_dec (coro->swap_sv);
1754 SvREFCNT_dec (CORO_THROW);
1755
1756 coro_call_on_destroy (aTHX_ coro);
1757
1758 /* more destruction mayhem in coro_state_free */
942} 1759}
943 1760
944static int 1761static int
945coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1762coro_state_free (pTHX_ SV *sv, MAGIC *mg)
946{ 1763{
947 struct coro *coro = (struct coro *)mg->mg_ptr; 1764 struct coro *coro = (struct coro *)mg->mg_ptr;
948 mg->mg_ptr = 0; 1765 mg->mg_ptr = 0;
949 1766
950 coro->hv = 0;
951
952 if (--coro->refcnt < 0)
953 {
954 coro_state_destroy (aTHX_ coro); 1767 coro_state_destroy (aTHX_ coro);
1768 SvREFCNT_dec (coro->on_destroy);
1769 SvREFCNT_dec (coro->status);
1770
955 Safefree (coro); 1771 Safefree (coro);
956 }
957 1772
958 return 0; 1773 return 0;
959} 1774}
960 1775
961static int 1776static int ecb_cold
962coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1777coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
963{ 1778{
964 struct coro *coro = (struct coro *)mg->mg_ptr; 1779 /* called when perl clones the current process the slow way (windows process emulation) */
965 1780 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
966 ++coro->refcnt; 1781 mg->mg_ptr = 0;
1782 mg->mg_virtual = 0;
967 1783
968 return 0; 1784 return 0;
969} 1785}
970 1786
971static MGVTBL coro_state_vtbl = { 1787static MGVTBL coro_state_vtbl = {
… …
977#else 1793#else
978# define MGf_DUP 0 1794# define MGf_DUP 0
979#endif 1795#endif
980}; 1796};
981 1797
982static struct coro *
983SvSTATE_ (pTHX_ SV *coro)
984{
985 HV *stash;
986 MAGIC *mg;
987
988 if (SvROK (coro))
989 coro = SvRV (coro);
990
991 stash = SvSTASH (coro);
992 if (stash != coro_stash && stash != coro_state_stash)
993 {
994 /* very slow, but rare, check */
995 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
996 croak ("Coro::State object required");
997 }
998
999 mg = CORO_MAGIC (coro);
1000 return (struct coro *)mg->mg_ptr;
1001}
1002
1003#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1004
1005static void 1798static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1799prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1800{
1008 ta->prev = SvSTATE (prev_sv); 1801 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1802 ta->next = SvSTATE (next_sv);
1803 TRANSFER_CHECK (*ta);
1010} 1804}
1011 1805
1012static void 1806static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1807api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1808{
1809 struct coro_transfer_args ta;
1810
1811 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1812 TRANSFER (ta, 1);
1813}
1814
1815/** Coro ********************************************************************/
1816
1817ecb_inline void
1818coro_enq (pTHX_ struct coro *coro)
1819{
1820 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1821
1822 SvREFCNT_inc_NN (coro->hv);
1823
1824 coro->next_ready = 0;
1825 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1826 ready [1] = coro;
1827}
1828
1829ecb_inline struct coro *
1830coro_deq (pTHX)
1831{
1832 int prio;
1833
1834 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1835 {
1836 struct coro **ready = coro_ready [prio];
1837
1838 if (ready [0])
1839 {
1840 struct coro *coro = ready [0];
1841 ready [0] = coro->next_ready;
1842 return coro;
1843 }
1844 }
1845
1846 return 0;
1847}
1848
1849static void
1850invoke_sv_ready_hook_helper (void)
1014{ 1851{
1015 dTHX; 1852 dTHX;
1016 struct transfer_args ta; 1853 dSP;
1017 1854
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1855 ENTER;
1019 TRANSFER (ta); 1856 SAVETMPS;
1857
1858 PUSHMARK (SP);
1859 PUTBACK;
1860 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1861
1862 FREETMPS;
1863 LEAVE;
1020} 1864}
1021 1865
1022static int 1866static int
1023api_save (SV *coro_sv, int new_save) 1867api_ready (pTHX_ SV *coro_sv)
1024{ 1868{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv); 1869 struct coro *coro = SvSTATE (coro_sv);
1027 int old_save = coro->save;
1028
1029 if (new_save >= 0)
1030 coro->save = new_save;
1031
1032 return old_save;
1033}
1034
1035/** Coro ********************************************************************/
1036
1037static void
1038coro_enq (pTHX_ SV *coro_sv)
1039{
1040 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1041}
1042
1043static SV *
1044coro_deq (pTHX_ int min_prio)
1045{
1046 int prio = PRIO_MAX - PRIO_MIN;
1047
1048 min_prio -= PRIO_MIN;
1049 if (min_prio < 0)
1050 min_prio = 0;
1051
1052 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1053 if (AvFILLp (coro_ready [prio]) >= 0)
1054 return av_shift (coro_ready [prio]);
1055
1056 return 0;
1057}
1058
1059static int
1060api_ready (SV *coro_sv)
1061{
1062 dTHX;
1063 struct coro *coro;
1064
1065 if (SvROK (coro_sv))
1066 coro_sv = SvRV (coro_sv);
1067
1068 coro = SvSTATE (coro_sv);
1069 1870
1070 if (coro->flags & CF_READY) 1871 if (coro->flags & CF_READY)
1071 return 0; 1872 return 0;
1072 1873
1073 coro->flags |= CF_READY; 1874 coro->flags |= CF_READY;
1074 1875
1075 LOCK; 1876 coro_enq (aTHX_ coro);
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1877
1077 ++coro_nready; 1878 if (!coro_nready++)
1078 UNLOCK; 1879 if (coroapi.readyhook)
1880 coroapi.readyhook ();
1079 1881
1080 return 1; 1882 return 1;
1081} 1883}
1082 1884
1083static int 1885static int
1084api_is_ready (SV *coro_sv) 1886api_is_ready (pTHX_ SV *coro_sv)
1085{ 1887{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1888 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1889}
1089 1890
1891/* expects to own a reference to next->hv */
1892ecb_inline void
1893prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1894{
1895 SV *prev_sv = SvRV (coro_current);
1896
1897 ta->prev = SvSTATE_hv (prev_sv);
1898 ta->next = next;
1899
1900 TRANSFER_CHECK (*ta);
1901
1902 SvRV_set (coro_current, (SV *)next->hv);
1903
1904 free_coro_mortal (aTHX);
1905 coro_mortal = prev_sv;
1906}
1907
1090static void 1908static void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1909prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1910{
1093 SV *prev_sv, *next_sv;
1094
1095 for (;;) 1911 for (;;)
1096 { 1912 {
1097 LOCK; 1913 struct coro *next = coro_deq (aTHX);
1098 next_sv = coro_deq (aTHX_ PRIO_MIN);
1099 1914
1915 if (ecb_expect_true (next))
1916 {
1917 /* cannot transfer to destroyed coros, skip and look for next */
1918 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1919 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1920 else
1921 {
1922 next->flags &= ~CF_READY;
1923 --coro_nready;
1924
1925 prepare_schedule_to (aTHX_ ta, next);
1926 break;
1927 }
1928 }
1929 else
1930 {
1100 /* nothing to schedule: call the idle handler */ 1931 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1932 if (SvROK (sv_idle)
1933 && SvOBJECT (SvRV (sv_idle)))
1934 {
1935 if (SvRV (sv_idle) == SvRV (coro_current))
1936 {
1937 require_pv ("Carp");
1938
1939 {
1940 dSP;
1941
1942 ENTER;
1943 SAVETMPS;
1944
1945 PUSHMARK (SP);
1946 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1947 PUTBACK;
1948 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1949
1950 FREETMPS;
1951 LEAVE;
1952 }
1953 }
1954
1955 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1956 api_ready (aTHX_ SvRV (sv_idle));
1957 --coro_nready;
1958 }
1959 else
1960 {
1961 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1962 dSP;
1963
1964 ENTER;
1965 SAVETMPS;
1966
1967 PUSHMARK (SP);
1968 PUTBACK;
1969 call_sv (sv_idle, G_VOID | G_DISCARD);
1970
1971 FREETMPS;
1972 LEAVE;
1973 }
1974 }
1975 }
1976}
1977
1978ecb_inline void
1979prepare_cede (pTHX_ struct coro_transfer_args *ta)
1980{
1981 api_ready (aTHX_ coro_current);
1982 prepare_schedule (aTHX_ ta);
1983}
1984
1985ecb_inline void
1986prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1987{
1988 SV *prev = SvRV (coro_current);
1989
1990 if (coro_nready)
1991 {
1992 prepare_schedule (aTHX_ ta);
1993 api_ready (aTHX_ prev);
1994 }
1995 else
1996 prepare_nop (aTHX_ ta);
1997}
1998
1999static void
2000api_schedule (pTHX)
2001{
2002 struct coro_transfer_args ta;
2003
2004 prepare_schedule (aTHX_ &ta);
2005 TRANSFER (ta, 1);
2006}
2007
2008static void
2009api_schedule_to (pTHX_ SV *coro_sv)
2010{
2011 struct coro_transfer_args ta;
2012 struct coro *next = SvSTATE (coro_sv);
2013
2014 SvREFCNT_inc_NN (coro_sv);
2015 prepare_schedule_to (aTHX_ &ta, next);
2016}
2017
2018static int
2019api_cede (pTHX)
2020{
2021 struct coro_transfer_args ta;
2022
2023 prepare_cede (aTHX_ &ta);
2024
2025 if (ecb_expect_true (ta.prev != ta.next))
2026 {
2027 TRANSFER (ta, 1);
2028 return 1;
2029 }
2030 else
2031 return 0;
2032}
2033
2034static int
2035api_cede_notself (pTHX)
2036{
2037 if (coro_nready)
2038 {
2039 struct coro_transfer_args ta;
2040
2041 prepare_cede_notself (aTHX_ &ta);
2042 TRANSFER (ta, 1);
2043 return 1;
2044 }
2045 else
2046 return 0;
2047}
2048
2049static void
2050api_trace (pTHX_ SV *coro_sv, int flags)
2051{
2052 struct coro *coro = SvSTATE (coro_sv);
2053
2054 if (coro->flags & CF_RUNNING)
2055 croak ("cannot enable tracing on a running coroutine, caught");
2056
2057 if (flags & CC_TRACE)
2058 {
2059 if (!coro->cctx)
2060 coro->cctx = cctx_new_run ();
2061 else if (!(coro->cctx->flags & CC_TRACE))
2062 croak ("cannot enable tracing on coroutine with custom stack, caught");
2063
2064 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2065 }
2066 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2067 {
2068 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2069
2070 if (coro->flags & CF_RUNNING)
2071 PL_runops = RUNOPS_DEFAULT;
2072 else
2073 coro->slot->runops = RUNOPS_DEFAULT;
2074 }
2075}
2076
2077static void
2078coro_push_av (pTHX_ AV *av, I32 gimme_v)
2079{
2080 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2081 {
2082 dSP;
2083
2084 if (gimme_v == G_SCALAR)
2085 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2086 else
2087 {
2088 int i;
2089 EXTEND (SP, AvFILLp (av) + 1);
2090
2091 for (i = 0; i <= AvFILLp (av); ++i)
2092 PUSHs (AvARRAY (av)[i]);
2093 }
2094
2095 PUTBACK;
2096 }
2097}
2098
2099static void
2100coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2101{
2102 if (!coro->on_destroy)
2103 coro->on_destroy = newAV ();
2104
2105 av_push (coro->on_destroy, cb);
2106}
2107
2108static void
2109slf_destroy_join (pTHX_ struct CoroSLF *frame)
2110{
2111 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2112}
2113
2114static int
2115slf_check_join (pTHX_ struct CoroSLF *frame)
2116{
2117 struct coro *coro = (struct coro *)frame->data;
2118
2119 if (!coro->status)
2120 return 1;
2121
2122 frame->destroy = 0;
2123
2124 coro_push_av (aTHX_ coro->status, GIMME_V);
2125
2126 SvREFCNT_dec ((SV *)coro->hv);
2127
2128 return 0;
2129}
2130
2131static void
2132slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2133{
2134 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2135
2136 if (items > 1)
2137 croak ("join called with too many arguments");
2138
2139 if (coro->status)
2140 frame->prepare = prepare_nop;
2141 else
2142 {
2143 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2144 frame->prepare = prepare_schedule;
2145 }
2146
2147 frame->check = slf_check_join;
2148 frame->destroy = slf_destroy_join;
2149 frame->data = (void *)coro;
2150 SvREFCNT_inc (coro->hv);
2151}
2152
2153static void
2154coro_call_on_destroy (pTHX_ struct coro *coro)
2155{
2156 AV *od = coro->on_destroy;
2157
2158 if (!od)
2159 return;
2160
2161 coro->on_destroy = 0;
2162 sv_2mortal ((SV *)od);
2163
2164 while (AvFILLp (od) >= 0)
2165 {
2166 SV *cb = sv_2mortal (av_pop (od));
2167
2168 /* coro hv's (and only hv's at the moment) are supported as well */
2169 if (SvSTATEhv_p (aTHX_ cb))
2170 api_ready (aTHX_ cb);
2171 else
2172 {
2173 dSP; /* don't disturb outer sp */
2174 PUSHMARK (SP);
2175
2176 if (coro->status)
2177 {
2178 PUTBACK;
2179 coro_push_av (aTHX_ coro->status, G_ARRAY);
2180 SPAGAIN;
2181 }
2182
2183 PUTBACK;
2184 call_sv (cb, G_VOID | G_DISCARD);
2185 }
2186 }
2187}
2188
2189static void
2190coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2191{
2192 AV *av;
2193
2194 if (coro->status)
2195 {
2196 av = coro->status;
2197 av_clear (av);
2198 }
2199 else
2200 av = coro->status = newAV ();
2201
2202 /* items are actually not so common, so optimise for this case */
2203 if (items)
2204 {
2205 int i;
2206
2207 av_extend (av, items - 1);
2208
2209 for (i = 0; i < items; ++i)
2210 av_push (av, SvREFCNT_inc_NN (arg [i]));
2211 }
2212}
2213
2214static void
2215slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2216{
2217 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2218 api_ready (aTHX_ sv_manager);
2219
2220 frame->prepare = prepare_schedule;
2221 frame->check = slf_check_repeat;
2222
2223 /* as a minor optimisation, we could unwind all stacks here */
2224 /* but that puts extra pressure on pp_slf, and is not worth much */
2225 /*coro_unwind_stacks (aTHX);*/
2226}
2227
2228static void
2229slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2230{
2231 HV *coro_hv = (HV *)SvRV (coro_current);
2232
2233 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2234 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2235}
2236
2237static void
2238slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2239{
2240 HV *coro_hv;
2241 struct coro *coro;
2242
2243 if (items <= 0)
2244 croak ("Coro::cancel called without coro object,");
2245
2246 coro = SvSTATE (arg [0]);
2247 coro_hv = coro->hv;
2248
2249 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2250
2251 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2252 {
2253 /* coro currently busy cancelling something, so just notify it */
2254 coro->slf_frame.data = (void *)coro;
2255
2256 frame->prepare = prepare_nop;
2257 frame->check = slf_check_nop;
2258 }
2259 else if (coro_hv == (HV *)SvRV (coro_current))
2260 {
2261 /* cancelling the current coro is allowed, and equals terminate */
2262 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2263 }
2264 else
2265 {
2266 struct coro *self = SvSTATE_current;
2267
2268 if (!self)
2269 croak ("Coro::cancel called outside of thread content,");
2270
2271 /* otherwise we cancel directly, purely for speed reasons
2272 * unfortunately, this requires some magic trickery, as
2273 * somebody else could cancel us, so we have to fight the cancellation.
2274 * this is ugly, and hopefully fully worth the extra speed.
2275 * besides, I can't get the slow-but-safe version working...
2276 */
2277 slf_frame.data = 0;
2278 self->flags |= CF_NOCANCEL;
2279 coro_state_destroy (aTHX_ coro);
2280 self->flags &= ~CF_NOCANCEL;
2281
2282 if (slf_frame.data)
2283 {
2284 /* while we were busy we have been cancelled, so terminate */
2285 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2286 }
2287 else
2288 {
2289 frame->prepare = prepare_nop;
2290 frame->check = slf_check_nop;
2291 }
2292 }
2293}
2294
2295static int
2296slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2297{
2298 frame->prepare = 0;
2299 coro_unwind_stacks (aTHX);
2300
2301 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2302
2303 return 1;
2304}
2305
2306static int
2307safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2308{
2309 if (coro->cctx)
2310 croak ("coro inside C callback, unable to cancel at this time, caught");
2311
2312 if (coro->flags & CF_NEW)
2313 {
2314 coro_set_status (aTHX_ coro, arg, items);
2315 coro_state_destroy (aTHX_ coro);
2316 }
2317 else
2318 {
2319 if (!coro->slf_frame.prepare)
2320 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2321
2322 slf_destroy (aTHX_ coro);
2323
2324 coro_set_status (aTHX_ coro, arg, items);
2325 coro->slf_frame.prepare = prepare_nop;
2326 coro->slf_frame.check = slf_check_safe_cancel;
2327
2328 api_ready (aTHX_ (SV *)coro->hv);
2329 }
2330
2331 return 1;
2332}
2333
2334/*****************************************************************************/
2335/* async pool handler */
2336
2337static int
2338slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2339{
2340 HV *hv = (HV *)SvRV (coro_current);
2341 struct coro *coro = (struct coro *)frame->data;
2342
2343 if (!coro->invoke_cb)
2344 return 1; /* loop till we have invoke */
2345 else
2346 {
2347 hv_store (hv, "desc", sizeof ("desc") - 1,
2348 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2349
2350 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2351
2352 {
2353 dSP;
2354 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2355 PUTBACK;
2356 }
2357
2358 SvREFCNT_dec (GvAV (PL_defgv));
2359 GvAV (PL_defgv) = coro->invoke_av;
2360 coro->invoke_av = 0;
2361
2362 return 0;
2363 }
2364}
2365
2366static void
2367slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2368{
2369 HV *hv = (HV *)SvRV (coro_current);
2370 struct coro *coro = SvSTATE_hv ((SV *)hv);
2371
2372 if (ecb_expect_true (coro->saved_deffh))
2373 {
2374 /* subsequent iteration */
2375 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2376 coro->saved_deffh = 0;
2377
2378 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2379 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2380 {
2381 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2382 return;
2383 }
2384 else
2385 {
2386 av_clear (GvAV (PL_defgv));
2387 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2388
2389 coro->prio = 0;
2390
2391 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2392 api_trace (aTHX_ coro_current, 0);
2393
2394 frame->prepare = prepare_schedule;
2395 av_push (av_async_pool, SvREFCNT_inc (hv));
2396 }
2397 }
2398 else
2399 {
2400 /* first iteration, simply fall through */
2401 frame->prepare = prepare_nop;
2402 }
2403
2404 frame->check = slf_check_pool_handler;
2405 frame->data = (void *)coro;
2406}
2407
2408/*****************************************************************************/
2409/* rouse callback */
2410
2411#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2412
2413static void
2414coro_rouse_callback (pTHX_ CV *cv)
2415{
2416 dXSARGS;
2417 SV *data = (SV *)S_GENSUB_ARG;
2418
2419 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2420 {
2421 /* first call, set args */
2422 SV *coro = SvRV (data);
2423 AV *av = newAV ();
2424
2425 SvRV_set (data, (SV *)av);
2426
2427 /* better take a full copy of the arguments */
2428 while (items--)
2429 av_store (av, items, newSVsv (ST (items)));
2430
2431 api_ready (aTHX_ coro);
2432 SvREFCNT_dec (coro);
2433 }
2434
2435 XSRETURN_EMPTY;
2436}
2437
2438static int
2439slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2440{
2441 SV *data = (SV *)frame->data;
2442
2443 if (CORO_THROW)
2444 return 0;
2445
2446 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2447 return 1;
2448
2449 /* now push all results on the stack */
2450 {
2451 dSP;
2452 AV *av = (AV *)SvRV (data);
2453 int i;
2454
2455 EXTEND (SP, AvFILLp (av) + 1);
2456 for (i = 0; i <= AvFILLp (av); ++i)
2457 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2458
2459 /* we have stolen the elements, so set length to zero and free */
2460 AvFILLp (av) = -1;
2461 av_undef (av);
2462
2463 PUTBACK;
2464 }
2465
2466 return 0;
2467}
2468
2469static void
2470slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2471{
2472 SV *cb;
2473
2474 if (items)
2475 cb = arg [0];
2476 else
2477 {
2478 struct coro *coro = SvSTATE_current;
2479
2480 if (!coro->rouse_cb)
2481 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2482
2483 cb = sv_2mortal (coro->rouse_cb);
2484 coro->rouse_cb = 0;
2485 }
2486
2487 if (!SvROK (cb)
2488 || SvTYPE (SvRV (cb)) != SVt_PVCV
2489 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2490 croak ("Coro::rouse_wait called with illegal callback argument,");
2491
2492 {
2493 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2494 SV *data = (SV *)S_GENSUB_ARG;
2495
2496 frame->data = (void *)data;
2497 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2498 frame->check = slf_check_rouse_wait;
2499 }
2500}
2501
2502static SV *
2503coro_new_rouse_cb (pTHX)
2504{
2505 HV *hv = (HV *)SvRV (coro_current);
2506 struct coro *coro = SvSTATE_hv (hv);
2507 SV *data = newRV_inc ((SV *)hv);
2508 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2509
2510 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2511 SvREFCNT_dec (data); /* magicext increases the refcount */
2512
2513 SvREFCNT_dec (coro->rouse_cb);
2514 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2515
2516 return cb;
2517}
2518
2519/*****************************************************************************/
2520/* schedule-like-function opcode (SLF) */
2521
2522static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2523static const CV *slf_cv;
2524static SV **slf_argv;
2525static int slf_argc, slf_arga; /* count, allocated */
2526static I32 slf_ax; /* top of stack, for restore */
2527
2528/* this restores the stack in the case we patched the entersub, to */
2529/* recreate the stack frame as perl will on following calls */
2530/* since entersub cleared the stack */
2531static OP *
2532pp_restore (pTHX)
2533{
2534 int i;
2535 SV **SP = PL_stack_base + slf_ax;
2536
2537 PUSHMARK (SP);
2538
2539 EXTEND (SP, slf_argc + 1);
2540
2541 for (i = 0; i < slf_argc; ++i)
2542 PUSHs (sv_2mortal (slf_argv [i]));
2543
2544 PUSHs ((SV *)CvGV (slf_cv));
2545
2546 RETURNOP (slf_restore.op_first);
2547}
2548
2549static void
2550slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2551{
2552 SV **arg = (SV **)slf_frame.data;
2553
2554 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2555}
2556
2557static void
2558slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2559{
2560 if (items != 2)
2561 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2562
2563 frame->prepare = slf_prepare_transfer;
2564 frame->check = slf_check_nop;
2565 frame->data = (void *)arg; /* let's hope it will stay valid */
2566}
2567
2568static void
2569slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2570{
2571 frame->prepare = prepare_schedule;
2572 frame->check = slf_check_nop;
2573}
2574
2575static void
2576slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2577{
2578 struct coro *next = (struct coro *)slf_frame.data;
2579
2580 SvREFCNT_inc_NN (next->hv);
2581 prepare_schedule_to (aTHX_ ta, next);
2582}
2583
2584static void
2585slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2586{
2587 if (!items)
2588 croak ("Coro::schedule_to expects a coroutine argument, caught");
2589
2590 frame->data = (void *)SvSTATE (arg [0]);
2591 frame->prepare = slf_prepare_schedule_to;
2592 frame->check = slf_check_nop;
2593}
2594
2595static void
2596slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2597{
2598 api_ready (aTHX_ SvRV (coro_current));
2599
2600 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2601}
2602
2603static void
2604slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2605{
2606 frame->prepare = prepare_cede;
2607 frame->check = slf_check_nop;
2608}
2609
2610static void
2611slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2612{
2613 frame->prepare = prepare_cede_notself;
2614 frame->check = slf_check_nop;
2615}
2616
2617/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2618static void
2619slf_destroy (pTHX_ struct coro *coro)
2620{
2621 struct CoroSLF frame = coro->slf_frame;
2622
2623 /*
2624 * The on_destroy below most likely is from an SLF call.
2625 * Since by definition the SLF call will not finish when we destroy
2626 * the coro, we will have to force-finish it here, otherwise
2627 * cleanup functions cannot call SLF functions.
2628 */
2629 coro->slf_frame.prepare = 0;
2630
2631 /* this callback is reserved for slf functions needing to do cleanup */
2632 if (frame.destroy && frame.prepare && !PL_dirty)
2633 frame.destroy (aTHX_ &frame);
2634}
2635
2636/*
2637 * these not obviously related functions are all rolled into one
2638 * function to increase chances that they all will call transfer with the same
2639 * stack offset
2640 * SLF stands for "schedule-like-function".
2641 */
2642static OP *
2643pp_slf (pTHX)
2644{
2645 I32 checkmark; /* mark SP to see how many elements check has pushed */
2646
2647 /* set up the slf frame, unless it has already been set-up */
2648 /* the latter happens when a new coro has been started */
2649 /* or when a new cctx was attached to an existing coroutine */
2650 if (ecb_expect_true (!slf_frame.prepare))
2651 {
2652 /* first iteration */
2653 dSP;
2654 SV **arg = PL_stack_base + TOPMARK + 1;
2655 int items = SP - arg; /* args without function object */
2656 SV *gv = *sp;
2657
2658 /* do a quick consistency check on the "function" object, and if it isn't */
2659 /* for us, divert to the real entersub */
2660 if (SvTYPE (gv) != SVt_PVGV
2661 || !GvCV (gv)
2662 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2663 return PL_ppaddr[OP_ENTERSUB](aTHX);
2664
2665 if (!(PL_op->op_flags & OPf_STACKED))
2666 {
2667 /* ampersand-form of call, use @_ instead of stack */
2668 AV *av = GvAV (PL_defgv);
2669 arg = AvARRAY (av);
2670 items = AvFILLp (av) + 1;
2671 }
2672
2673 /* now call the init function, which needs to set up slf_frame */
2674 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2675 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2676
2677 /* pop args */
2678 SP = PL_stack_base + POPMARK;
2679
2680 PUTBACK;
2681 }
2682
2683 /* now that we have a slf_frame, interpret it! */
2684 /* we use a callback system not to make the code needlessly */
2685 /* complicated, but so we can run multiple perl coros from one cctx */
2686
2687 do
2688 {
2689 struct coro_transfer_args ta;
2690
2691 slf_frame.prepare (aTHX_ &ta);
2692 TRANSFER (ta, 0);
2693
2694 checkmark = PL_stack_sp - PL_stack_base;
2695 }
2696 while (slf_frame.check (aTHX_ &slf_frame));
2697
2698 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2699
2700 /* exception handling */
2701 if (ecb_expect_false (CORO_THROW))
2702 {
2703 SV *exception = sv_2mortal (CORO_THROW);
2704
2705 CORO_THROW = 0;
2706 sv_setsv (ERRSV, exception);
2707 croak (0);
2708 }
2709
2710 /* return value handling - mostly like entersub */
2711 /* make sure we put something on the stack in scalar context */
2712 if (GIMME_V == G_SCALAR
2713 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2714 {
2715 dSP;
2716 SV **bot = PL_stack_base + checkmark;
2717
2718 if (sp == bot) /* too few, push undef */
2719 bot [1] = &PL_sv_undef;
2720 else /* too many, take last one */
2721 bot [1] = *sp;
2722
2723 SP = bot + 1;
2724
2725 PUTBACK;
2726 }
2727
2728 return NORMAL;
2729}
2730
2731static void
2732api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2733{
2734 int i;
2735 SV **arg = PL_stack_base + ax;
2736 int items = PL_stack_sp - arg + 1;
2737
2738 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2739
2740 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2741 && PL_op->op_ppaddr != pp_slf)
2742 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2743
2744 CvFLAGS (cv) |= CVf_SLF;
2745 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2746 slf_cv = cv;
2747
2748 /* we patch the op, and then re-run the whole call */
2749 /* we have to put the same argument on the stack for this to work */
2750 /* and this will be done by pp_restore */
2751 slf_restore.op_next = (OP *)&slf_restore;
2752 slf_restore.op_type = OP_CUSTOM;
2753 slf_restore.op_ppaddr = pp_restore;
2754 slf_restore.op_first = PL_op;
2755
2756 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2757
2758 if (PL_op->op_flags & OPf_STACKED)
2759 {
2760 if (items > slf_arga)
2761 {
2762 slf_arga = items;
2763 Safefree (slf_argv);
2764 New (0, slf_argv, slf_arga, SV *);
2765 }
2766
2767 slf_argc = items;
2768
2769 for (i = 0; i < items; ++i)
2770 slf_argv [i] = SvREFCNT_inc (arg [i]);
2771 }
2772 else
2773 slf_argc = 0;
2774
2775 PL_op->op_ppaddr = pp_slf;
2776 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2777
2778 PL_op = (OP *)&slf_restore;
2779}
2780
2781/*****************************************************************************/
2782/* dynamic wind */
2783
2784static void
2785on_enterleave_call (pTHX_ SV *cb)
2786{
2787 dSP;
2788
2789 PUSHSTACK;
2790
2791 PUSHMARK (SP);
2792 PUTBACK;
2793 call_sv (cb, G_VOID | G_DISCARD);
2794 SPAGAIN;
2795
2796 POPSTACK;
2797}
2798
2799static SV *
2800coro_avp_pop_and_free (pTHX_ AV **avp)
2801{
2802 AV *av = *avp;
2803 SV *res = av_pop (av);
2804
2805 if (AvFILLp (av) < 0)
2806 {
2807 *avp = 0;
2808 SvREFCNT_dec (av);
2809 }
2810
2811 return res;
2812}
2813
2814static void
2815coro_pop_on_enter (pTHX_ void *coro)
2816{
2817 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2818 SvREFCNT_dec (cb);
2819}
2820
2821static void
2822coro_pop_on_leave (pTHX_ void *coro)
2823{
2824 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2825 on_enterleave_call (aTHX_ sv_2mortal (cb));
2826}
2827
2828/*****************************************************************************/
2829/* PerlIO::cede */
2830
2831typedef struct
2832{
2833 PerlIOBuf base;
2834 NV next, every;
2835} PerlIOCede;
2836
2837static IV ecb_cold
2838PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2839{
2840 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2841
2842 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2843 self->next = nvtime () + self->every;
2844
2845 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2846}
2847
2848static SV * ecb_cold
2849PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2850{
2851 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2852
2853 return newSVnv (self->every);
2854}
2855
2856static IV
2857PerlIOCede_flush (pTHX_ PerlIO *f)
2858{
2859 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2860 double now = nvtime ();
2861
2862 if (now >= self->next)
2863 {
2864 api_cede (aTHX);
2865 self->next = now + self->every;
2866 }
2867
2868 return PerlIOBuf_flush (aTHX_ f);
2869}
2870
2871static PerlIO_funcs PerlIO_cede =
2872{
2873 sizeof(PerlIO_funcs),
2874 "cede",
2875 sizeof(PerlIOCede),
2876 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2877 PerlIOCede_pushed,
2878 PerlIOBuf_popped,
2879 PerlIOBuf_open,
2880 PerlIOBase_binmode,
2881 PerlIOCede_getarg,
2882 PerlIOBase_fileno,
2883 PerlIOBuf_dup,
2884 PerlIOBuf_read,
2885 PerlIOBuf_unread,
2886 PerlIOBuf_write,
2887 PerlIOBuf_seek,
2888 PerlIOBuf_tell,
2889 PerlIOBuf_close,
2890 PerlIOCede_flush,
2891 PerlIOBuf_fill,
2892 PerlIOBase_eof,
2893 PerlIOBase_error,
2894 PerlIOBase_clearerr,
2895 PerlIOBase_setlinebuf,
2896 PerlIOBuf_get_base,
2897 PerlIOBuf_bufsiz,
2898 PerlIOBuf_get_ptr,
2899 PerlIOBuf_get_cnt,
2900 PerlIOBuf_set_ptrcnt,
2901};
2902
2903/*****************************************************************************/
2904/* Coro::Semaphore & Coro::Signal */
2905
2906static SV *
2907coro_waitarray_new (pTHX_ int count)
2908{
2909 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2910 AV *av = newAV ();
2911 SV **ary;
2912
2913 /* unfortunately, building manually saves memory */
2914 Newx (ary, 2, SV *);
2915 AvALLOC (av) = ary;
2916#if PERL_VERSION_ATLEAST (5,10,0)
2917 AvARRAY (av) = ary;
2918#else
2919 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2920 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2921 SvPVX ((SV *)av) = (char *)ary;
2922#endif
2923 AvMAX (av) = 1;
2924 AvFILLp (av) = 0;
2925 ary [0] = newSViv (count);
2926
2927 return newRV_noinc ((SV *)av);
2928}
2929
2930/* semaphore */
2931
2932static void
2933coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2934{
2935 SV *count_sv = AvARRAY (av)[0];
2936 IV count = SvIVX (count_sv);
2937
2938 count += adjust;
2939 SvIVX (count_sv) = count;
2940
2941 /* now wake up as many waiters as are expected to lock */
2942 while (count > 0 && AvFILLp (av) > 0)
2943 {
2944 SV *cb;
2945
2946 /* swap first two elements so we can shift a waiter */
2947 AvARRAY (av)[0] = AvARRAY (av)[1];
2948 AvARRAY (av)[1] = count_sv;
2949 cb = av_shift (av);
2950
2951 if (SvOBJECT (cb))
2952 {
2953 api_ready (aTHX_ cb);
2954 --count;
2955 }
2956 else if (SvTYPE (cb) == SVt_PVCV)
1102 { 2957 {
1103 dSP; 2958 dSP;
1104 UNLOCK;
1105
1106 ENTER;
1107 SAVETMPS;
1108
1109 PUSHMARK (SP); 2959 PUSHMARK (SP);
2960 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1110 PUTBACK; 2961 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2962 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1112
1113 FREETMPS;
1114 LEAVE;
1115 continue;
1116 } 2963 }
1117 2964
1118 ta->next = SvSTATE (next_sv); 2965 SvREFCNT_dec (cb);
2966 }
2967}
1119 2968
1120 /* cannot transfer to destroyed coros, skip and look for next */ 2969static void
1121 if (ta->next->flags & CF_DESTROYED) 2970coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2971{
2972 /* call $sem->adjust (0) to possibly wake up some other waiters */
2973 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2974}
2975
2976static int
2977slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2978{
2979 AV *av = (AV *)frame->data;
2980 SV *count_sv = AvARRAY (av)[0];
2981 SV *coro_hv = SvRV (coro_current);
2982
2983 frame->destroy = 0;
2984
2985 /* if we are about to throw, don't actually acquire the lock, just throw */
2986 if (ecb_expect_false (CORO_THROW))
2987 {
2988 /* we still might be responsible for the semaphore, so wake up others */
2989 coro_semaphore_adjust (aTHX_ av, 0);
2990
2991 return 0;
2992 }
2993 else if (SvIVX (count_sv) > 0)
2994 {
2995 if (acquire)
2996 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2997 else
2998 coro_semaphore_adjust (aTHX_ av, 0);
2999
3000 return 0;
3001 }
3002 else
3003 {
3004 int i;
3005 /* if we were woken up but can't down, we look through the whole */
3006 /* waiters list and only add us if we aren't in there already */
3007 /* this avoids some degenerate memory usage cases */
3008 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3009 if (AvARRAY (av)[i] == coro_hv)
3010 return 1;
3011
3012 av_push (av, SvREFCNT_inc (coro_hv));
3013 return 1;
3014 }
3015}
3016
3017static int
3018slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3019{
3020 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3021}
3022
3023static int
3024slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3025{
3026 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3027}
3028
3029static void
3030slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3031{
3032 AV *av = (AV *)SvRV (arg [0]);
3033
3034 if (SvIVX (AvARRAY (av)[0]) > 0)
3035 {
3036 frame->data = (void *)av;
3037 frame->prepare = prepare_nop;
3038 }
3039 else
3040 {
3041 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3042
3043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3044 frame->prepare = prepare_schedule;
3045 /* to avoid race conditions when a woken-up coro gets terminated */
3046 /* we arrange for a temporary on_destroy that calls adjust (0) */
3047 frame->destroy = coro_semaphore_destroy;
3048 }
3049}
3050
3051static void
3052slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3053{
3054 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3055 frame->check = slf_check_semaphore_down;
3056}
3057
3058static void
3059slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3060{
3061 if (items >= 2)
3062 {
3063 /* callback form */
3064 AV *av = (AV *)SvRV (arg [0]);
3065 SV *cb_cv = s_get_cv_croak (arg [1]);
3066
3067 av_push (av, SvREFCNT_inc_NN (cb_cv));
3068
3069 if (SvIVX (AvARRAY (av)[0]) > 0)
3070 coro_semaphore_adjust (aTHX_ av, 0);
3071
3072 frame->prepare = prepare_nop;
3073 frame->check = slf_check_nop;
3074 }
3075 else
3076 {
3077 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3078 frame->check = slf_check_semaphore_wait;
3079 }
3080}
3081
3082/* signal */
3083
3084static void
3085coro_signal_wake (pTHX_ AV *av, int count)
3086{
3087 SvIVX (AvARRAY (av)[0]) = 0;
3088
3089 /* now signal count waiters */
3090 while (count > 0 && AvFILLp (av) > 0)
3091 {
3092 SV *cb;
3093
3094 /* swap first two elements so we can shift a waiter */
3095 cb = AvARRAY (av)[0];
3096 AvARRAY (av)[0] = AvARRAY (av)[1];
3097 AvARRAY (av)[1] = cb;
3098
3099 cb = av_shift (av);
3100
3101 if (SvTYPE (cb) == SVt_PVCV)
1122 { 3102 {
3103 dSP;
3104 PUSHMARK (SP);
3105 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1123 UNLOCK; 3106 PUTBACK;
1124 SvREFCNT_dec (next_sv); 3107 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1125 /* coro_nready is already taken care of by destroy */
1126 continue;
1127 } 3108 }
3109 else
3110 {
3111 api_ready (aTHX_ cb);
3112 sv_setiv (cb, 0); /* signal waiter */
3113 }
1128 3114
1129 --coro_nready; 3115 SvREFCNT_dec (cb);
1130 UNLOCK;
1131 break;
1132 }
1133 3116
1134 /* free this only after the transfer */ 3117 --count;
1135 prev_sv = SvRV (coro_current); 3118 }
1136 SvRV_set (coro_current, next_sv);
1137 ta->prev = SvSTATE (prev_sv);
1138
1139 assert (ta->next->flags & CF_READY);
1140 ta->next->flags &= ~CF_READY;
1141
1142 LOCK;
1143 free_coro_mortal (aTHX);
1144 coro_mortal = prev_sv;
1145 UNLOCK;
1146}
1147
1148static void
1149prepare_cede (pTHX_ struct transfer_args *ta)
1150{
1151 api_ready (coro_current);
1152 prepare_schedule (aTHX_ ta);
1153} 3119}
1154 3120
1155static int 3121static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 3122slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1157{ 3123{
1158 if (coro_nready) 3124 /* if we are about to throw, also stop waiting */
3125 return SvROK ((SV *)frame->data) && !CORO_THROW;
3126}
3127
3128static void
3129slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3130{
3131 AV *av = (AV *)SvRV (arg [0]);
3132
3133 if (items >= 2)
3134 {
3135 SV *cb_cv = s_get_cv_croak (arg [1]);
3136 av_push (av, SvREFCNT_inc_NN (cb_cv));
3137
3138 if (SvIVX (AvARRAY (av)[0]))
3139 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3140
3141 frame->prepare = prepare_nop;
3142 frame->check = slf_check_nop;
1159 { 3143 }
1160 SV *prev = SvRV (coro_current); 3144 else if (SvIVX (AvARRAY (av)[0]))
1161 prepare_schedule (aTHX_ ta); 3145 {
1162 api_ready (prev); 3146 SvIVX (AvARRAY (av)[0]) = 0;
1163 return 1; 3147 frame->prepare = prepare_nop;
3148 frame->check = slf_check_nop;
1164 } 3149 }
1165 else 3150 else
3151 {
3152 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3153
3154 av_push (av, waiter);
3155
3156 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3157 frame->prepare = prepare_schedule;
3158 frame->check = slf_check_signal_wait;
3159 }
3160}
3161
3162/*****************************************************************************/
3163/* Coro::AIO */
3164
3165#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3166
3167/* helper storage struct */
3168struct io_state
3169{
3170 int errorno;
3171 I32 laststype; /* U16 in 5.10.0 */
3172 int laststatval;
3173 Stat_t statcache;
3174};
3175
3176static void
3177coro_aio_callback (pTHX_ CV *cv)
3178{
3179 dXSARGS;
3180 AV *state = (AV *)S_GENSUB_ARG;
3181 SV *coro = av_pop (state);
3182 SV *data_sv = newSV (sizeof (struct io_state));
3183
3184 av_extend (state, items - 1);
3185
3186 sv_upgrade (data_sv, SVt_PV);
3187 SvCUR_set (data_sv, sizeof (struct io_state));
3188 SvPOK_only (data_sv);
3189
3190 {
3191 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3192
3193 data->errorno = errno;
3194 data->laststype = PL_laststype;
3195 data->laststatval = PL_laststatval;
3196 data->statcache = PL_statcache;
3197 }
3198
3199 /* now build the result vector out of all the parameters and the data_sv */
3200 {
3201 int i;
3202
3203 for (i = 0; i < items; ++i)
3204 av_push (state, SvREFCNT_inc_NN (ST (i)));
3205 }
3206
3207 av_push (state, data_sv);
3208
3209 api_ready (aTHX_ coro);
3210 SvREFCNT_dec (coro);
3211 SvREFCNT_dec ((AV *)state);
3212}
3213
3214static int
3215slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3216{
3217 AV *state = (AV *)frame->data;
3218
3219 /* if we are about to throw, return early */
3220 /* this does not cancel the aio request, but at least */
3221 /* it quickly returns */
3222 if (CORO_THROW)
1166 return 0; 3223 return 0;
1167}
1168 3224
1169static void 3225 /* one element that is an RV? repeat! */
1170api_schedule (void) 3226 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1171{
1172 dTHX;
1173 struct transfer_args ta;
1174
1175 prepare_schedule (aTHX_ &ta);
1176 TRANSFER (ta);
1177}
1178
1179static int
1180api_cede (void)
1181{
1182 dTHX;
1183 struct transfer_args ta;
1184
1185 prepare_cede (aTHX_ &ta);
1186
1187 if (ta.prev != ta.next)
1188 {
1189 TRANSFER (ta);
1190 return 1; 3227 return 1;
3228
3229 /* restore status */
3230 {
3231 SV *data_sv = av_pop (state);
3232 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3233
3234 errno = data->errorno;
3235 PL_laststype = data->laststype;
3236 PL_laststatval = data->laststatval;
3237 PL_statcache = data->statcache;
3238
3239 SvREFCNT_dec (data_sv);
1191 } 3240 }
1192 else 3241
3242 /* push result values */
3243 {
3244 dSP;
3245 int i;
3246
3247 EXTEND (SP, AvFILLp (state) + 1);
3248 for (i = 0; i <= AvFILLp (state); ++i)
3249 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3250
3251 PUTBACK;
3252 }
3253
1193 return 0; 3254 return 0;
1194} 3255}
1195 3256
1196static int 3257static void
1197api_cede_notself (void) 3258slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1198{ 3259{
1199 dTHX; 3260 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1200 struct transfer_args ta; 3261 SV *coro_hv = SvRV (coro_current);
3262 struct coro *coro = SvSTATE_hv (coro_hv);
1201 3263
1202 if (prepare_cede_notself (aTHX_ &ta)) 3264 /* put our coroutine id on the state arg */
1203 { 3265 av_push (state, SvREFCNT_inc_NN (coro_hv));
1204 TRANSFER (ta); 3266
1205 return 1; 3267 /* first see whether we have a non-zero priority and set it as AIO prio */
3268 if (coro->prio)
1206 } 3269 {
1207 else 3270 dSP;
1208 return 0;
1209}
1210 3271
3272 static SV *prio_cv;
3273 static SV *prio_sv;
3274
3275 if (ecb_expect_false (!prio_cv))
3276 {
3277 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3278 prio_sv = newSViv (0);
3279 }
3280
3281 PUSHMARK (SP);
3282 sv_setiv (prio_sv, coro->prio);
3283 XPUSHs (prio_sv);
3284
3285 PUTBACK;
3286 call_sv (prio_cv, G_VOID | G_DISCARD);
3287 }
3288
3289 /* now call the original request */
3290 {
3291 dSP;
3292 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3293 int i;
3294
3295 PUSHMARK (SP);
3296
3297 /* first push all args to the stack */
3298 EXTEND (SP, items + 1);
3299
3300 for (i = 0; i < items; ++i)
3301 PUSHs (arg [i]);
3302
3303 /* now push the callback closure */
3304 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3305
3306 /* now call the AIO function - we assume our request is uncancelable */
3307 PUTBACK;
3308 call_sv ((SV *)req, G_VOID | G_DISCARD);
3309 }
3310
3311 /* now that the request is going, we loop till we have a result */
3312 frame->data = (void *)state;
3313 frame->prepare = prepare_schedule;
3314 frame->check = slf_check_aio_req;
3315}
3316
3317static void
3318coro_aio_req_xs (pTHX_ CV *cv)
3319{
3320 dXSARGS;
3321
3322 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3323
3324 XSRETURN_EMPTY;
3325}
3326
3327/*****************************************************************************/
3328
3329#if CORO_CLONE
3330# include "clone.c"
3331#endif
3332
3333/*****************************************************************************/
3334
3335static SV *
3336coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3337{
3338 SV *coro_sv;
3339 struct coro *coro;
3340 MAGIC *mg;
3341 HV *hv;
3342 SV *cb;
3343 int i;
3344
3345 if (argc > 0)
3346 {
3347 cb = s_get_cv_croak (argv [0]);
3348
3349 if (!is_coro)
3350 {
3351 if (CvISXSUB (cb))
3352 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3353
3354 if (!CvROOT (cb))
3355 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3356 }
3357 }
3358
3359 Newz (0, coro, 1, struct coro);
3360 coro->args = newAV ();
3361 coro->flags = CF_NEW;
3362
3363 if (coro_first) coro_first->prev = coro;
3364 coro->next = coro_first;
3365 coro_first = coro;
3366
3367 coro->hv = hv = newHV ();
3368 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3369 mg->mg_flags |= MGf_DUP;
3370 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3371
3372 if (argc > 0)
3373 {
3374 av_extend (coro->args, argc + is_coro - 1);
3375
3376 if (is_coro)
3377 {
3378 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3379 cb = (SV *)cv_coro_run;
3380 }
3381
3382 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3383
3384 for (i = 1; i < argc; i++)
3385 av_push (coro->args, newSVsv (argv [i]));
3386 }
3387
3388 return coro_sv;
3389}
3390
3391#ifndef __cplusplus
3392ecb_cold XS(boot_Coro__State);
3393#endif
3394
3395#if CORO_JIT
3396
3397static void ecb_noinline ecb_cold
3398pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3399{
3400 dSP;
3401 AV *av = newAV ();
3402
3403 av_store (av, 3, newSVuv (d));
3404 av_store (av, 2, newSVuv (c));
3405 av_store (av, 1, newSVuv (b));
3406 av_store (av, 0, newSVuv (a));
3407
3408 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3409
3410 PUTBACK;
3411}
3412
3413static void ecb_noinline ecb_cold
3414jit_init (pTHX)
3415{
3416 dSP;
3417 SV *load, *save;
3418 char *map_base;
3419 char *load_ptr, *save_ptr;
3420 STRLEN load_len, save_len, map_len;
3421 int count;
3422
3423 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3424
3425 PUSHMARK (SP);
3426 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3427 #include "state.h"
3428 count = call_pv ("Coro::State::_jit", G_ARRAY);
3429 SPAGAIN;
3430
3431 save = POPs; save_ptr = SvPVbyte (save, save_len);
3432 load = POPs; load_ptr = SvPVbyte (load, load_len);
3433
3434 map_len = load_len + save_len + 16;
3435
3436 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3437
3438 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3439
3440 load_perl_slots = (load_save_perl_slots_type)map_base;
3441 memcpy (map_base, load_ptr, load_len);
3442
3443 map_base += (load_len + 15) & ~15;
3444
3445 save_perl_slots = (load_save_perl_slots_type)map_base;
3446 memcpy (map_base, save_ptr, save_len);
3447
3448 /* we are good citizens and try to make the page read-only, so the evil evil */
3449 /* hackers might have it a bit more difficult */
3450 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3451
3452 PUTBACK;
3453 eval_pv ("undef &Coro::State::_jit", 1);
3454}
3455
3456#endif
3457
1211MODULE = Coro::State PACKAGE = Coro::State 3458MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 3459
1213PROTOTYPES: DISABLE 3460PROTOTYPES: DISABLE
1214 3461
1215BOOT: 3462BOOT:
1216{ 3463{
3464#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3465#include "state.h"
1217#ifdef USE_ITHREADS 3466#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 3467# if CORO_PTHREAD
3468 coro_thx = PERL_GET_CONTEXT;
1219#endif 3469# endif
1220 BOOT_PAGESIZE; 3470#endif
3471 /* perl defines these to check for existance first, but why it doesn't */
3472 /* just create them one at init time is not clear to me, except for */
3473 /* programs trying to delete them, but... */
3474 /* anyway, we declare this as invalid and make sure they are initialised here */
3475 DEFSV;
3476 ERRSV;
3477
3478 cctx_current = cctx_new_empty ();
3479
3480 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3481 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3482
3483 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3484 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3485 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3486
3487 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3488 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3489 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1221 3490
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3491 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 3492
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3493 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3494 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1226 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1227 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1228 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1229 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3495 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3496 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 3497
1232 main_mainstack = PL_mainstack; 3498 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 3499 main_top_env = PL_top_env;
1234 3500
1235 while (main_top_env->je_prev) 3501 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 3502 main_top_env = main_top_env->je_prev;
1237 3503
3504 {
3505 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3506
3507 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3508 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3509
3510 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3511 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3512 }
3513
1238 coroapi.ver = CORO_API_VERSION; 3514 coroapi.ver = CORO_API_VERSION;
3515 coroapi.rev = CORO_API_REVISION;
3516
1239 coroapi.transfer = api_transfer; 3517 coroapi.transfer = api_transfer;
1240 3518
3519 coroapi.sv_state = SvSTATE_;
3520 coroapi.execute_slf = api_execute_slf;
3521 coroapi.prepare_nop = prepare_nop;
3522 coroapi.prepare_schedule = prepare_schedule;
3523 coroapi.prepare_cede = prepare_cede;
3524 coroapi.prepare_cede_notself = prepare_cede_notself;
3525
3526 time_init (aTHX);
3527
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3528 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3529#if CORO_JIT
3530 PUTBACK;
3531 jit_init (aTHX);
3532 SPAGAIN;
3533#endif
1242} 3534}
1243 3535
1244SV * 3536SV *
1245new (char *klass, ...) 3537new (SV *klass, ...)
3538 ALIAS:
3539 Coro::new = 1
1246 CODE: 3540 CODE:
1247{ 3541 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1248 struct coro *coro;
1249 HV *hv;
1250 int i;
1251
1252 Newz (0, coro, 1, struct coro);
1253 coro->args = newAV ();
1254 coro->save = CORO_SAVE_DEF;
1255 coro->flags = CF_NEW;
1256
1257 if (coro_first) coro_first->prev = coro;
1258 coro->next = coro_first;
1259 coro_first = coro;
1260
1261 coro->hv = hv = newHV ();
1262 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1263 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264
1265 for (i = 1; i < items; i++)
1266 av_push (coro->args, newSVsv (ST (i)));
1267}
1268 OUTPUT:
1269 RETVAL
1270
1271int
1272save (SV *coro, int new_save = -1)
1273 CODE:
1274 RETVAL = api_save (coro, new_save);
1275 OUTPUT: 3542 OUTPUT:
1276 RETVAL 3543 RETVAL
1277 3544
1278int 3545void
1279save_also (SV *coro_sv, int save_also) 3546transfer (...)
3547 PROTOTYPE: $$
1280 CODE: 3548 CODE:
3549 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3550
3551SV *
3552clone (Coro::State coro)
3553 CODE:
1281{ 3554{
1282 struct coro *coro = SvSTATE (coro_sv); 3555#if CORO_CLONE
1283 RETVAL = coro->save; 3556 struct coro *ncoro = coro_clone (aTHX_ coro);
1284 coro->save |= save_also; 3557 MAGIC *mg;
3558 /* TODO: too much duplication */
3559 ncoro->hv = newHV ();
3560 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3561 mg->mg_flags |= MGf_DUP;
3562 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3563#else
3564 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3565#endif
1285} 3566}
1286 OUTPUT: 3567 OUTPUT:
1287 RETVAL 3568 RETVAL
1288 3569
1289void 3570int
1290_set_stacklevel (...) 3571cctx_stacksize (int new_stacksize = 0)
1291 ALIAS: 3572 PROTOTYPE: ;$
1292 Coro::State::transfer = 1 3573 CODE:
1293 Coro::schedule = 2 3574 RETVAL = cctx_stacksize;
1294 Coro::cede = 3 3575 if (new_stacksize)
1295 Coro::cede_notself = 4
1296 CODE:
1297{
1298 struct transfer_args ta;
1299
1300 switch (ix)
1301 { 3576 {
1302 case 0: 3577 cctx_stacksize = new_stacksize;
1303 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3578 ++cctx_gen;
1304 ta.next = 0;
1305 break;
1306
1307 case 1:
1308 if (items != 2)
1309 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1310
1311 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1312 break;
1313
1314 case 2:
1315 prepare_schedule (aTHX_ &ta);
1316 break;
1317
1318 case 3:
1319 prepare_cede (aTHX_ &ta);
1320 break;
1321
1322 case 4:
1323 if (!prepare_cede_notself (aTHX_ &ta))
1324 XSRETURN_EMPTY;
1325
1326 break;
1327 } 3579 }
1328
1329 BARRIER;
1330 TRANSFER (ta);
1331
1332 if (GIMME_V != G_VOID && ta.next != ta.prev)
1333 XSRETURN_YES;
1334}
1335
1336bool
1337_destroy (SV *coro_sv)
1338 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT: 3580 OUTPUT:
1341 RETVAL 3581 RETVAL
1342 3582
1343void 3583int
1344_exit (code) 3584cctx_max_idle (int max_idle = 0)
1345 int code 3585 PROTOTYPE: ;$
1346 PROTOTYPE: $
1347 CODE: 3586 CODE:
1348 _exit (code); 3587 RETVAL = cctx_max_idle;
1349 3588 if (max_idle > 1)
1350int 3589 cctx_max_idle = max_idle;
1351cctx_stacksize (int new_stacksize = 0)
1352 CODE:
1353 RETVAL = coro_stacksize;
1354 if (new_stacksize)
1355 coro_stacksize = new_stacksize;
1356 OUTPUT: 3590 OUTPUT:
1357 RETVAL 3591 RETVAL
1358 3592
1359int 3593int
1360cctx_count () 3594cctx_count ()
3595 PROTOTYPE:
1361 CODE: 3596 CODE:
1362 RETVAL = cctx_count; 3597 RETVAL = cctx_count;
1363 OUTPUT: 3598 OUTPUT:
1364 RETVAL 3599 RETVAL
1365 3600
1366int 3601int
1367cctx_idle () 3602cctx_idle ()
3603 PROTOTYPE:
1368 CODE: 3604 CODE:
1369 RETVAL = cctx_idle; 3605 RETVAL = cctx_idle;
1370 OUTPUT: 3606 OUTPUT:
1371 RETVAL 3607 RETVAL
1372 3608
1373void 3609void
1374list () 3610list ()
3611 PROTOTYPE:
1375 PPCODE: 3612 PPCODE:
1376{ 3613{
1377 struct coro *coro; 3614 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 3615 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 3616 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3617 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 3618}
1382 3619
… …
1384call (Coro::State coro, SV *coderef) 3621call (Coro::State coro, SV *coderef)
1385 ALIAS: 3622 ALIAS:
1386 eval = 1 3623 eval = 1
1387 CODE: 3624 CODE:
1388{ 3625{
1389 if (coro->mainstack) 3626 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1390 { 3627 {
1391 struct coro temp; 3628 struct coro *current = SvSTATE_current;
1392 Zero (&temp, 1, struct coro); 3629 struct CoroSLF slf_save;
1393 temp.save = CORO_SAVE_ALL;
1394 3630
1395 if (!(coro->flags & CF_RUNNING)) 3631 if (current != coro)
1396 { 3632 {
3633 PUTBACK;
1397 save_perl (aTHX_ &temp); 3634 save_perl (aTHX_ current);
1398 load_perl (aTHX_ coro); 3635 load_perl (aTHX_ coro);
3636 /* the coro is most likely in an active SLF call.
3637 * while not strictly required (the code we execute is
3638 * not allowed to call any SLF functions), it's cleaner
3639 * to reinitialise the slf_frame and restore it later.
3640 * This might one day allow us to actually do SLF calls
3641 * from code executed here.
3642 */
3643 slf_save = slf_frame;
3644 slf_frame.prepare = 0;
3645 SPAGAIN;
1399 } 3646 }
1400 3647
1401 { 3648 PUSHSTACK;
1402 dSP; 3649
1403 ENTER;
1404 SAVETMPS;
1405 PUSHMARK (SP); 3650 PUSHMARK (SP);
1406 PUTBACK; 3651 PUTBACK;
3652
1407 if (ix) 3653 if (ix)
1408 eval_sv (coderef, 0); 3654 eval_sv (coderef, 0);
1409 else 3655 else
1410 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3656 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3657
3658 POPSTACK;
1411 SPAGAIN; 3659 SPAGAIN;
1412 FREETMPS;
1413 LEAVE;
1414 PUTBACK;
1415 }
1416 3660
1417 if (!(coro->flags & CF_RUNNING)) 3661 if (current != coro)
1418 { 3662 {
3663 PUTBACK;
3664 slf_frame = slf_save;
1419 save_perl (aTHX_ coro); 3665 save_perl (aTHX_ coro);
1420 load_perl (aTHX_ &temp); 3666 load_perl (aTHX_ current);
3667 SPAGAIN;
1421 } 3668 }
1422 } 3669 }
1423} 3670}
1424 3671
1425SV * 3672SV *
1426is_ready (Coro::State coro) 3673is_ready (Coro::State coro)
1427 PROTOTYPE: $ 3674 PROTOTYPE: $
1428 ALIAS: 3675 ALIAS:
1429 is_ready = CF_READY 3676 is_ready = CF_READY
1430 is_running = CF_RUNNING 3677 is_running = CF_RUNNING
1431 is_new = CF_NEW 3678 is_new = CF_NEW
1432 is_destroyed = CF_DESTROYED 3679 is_destroyed = CF_ZOMBIE
3680 is_zombie = CF_ZOMBIE
3681 is_suspended = CF_SUSPENDED
1433 CODE: 3682 CODE:
1434 RETVAL = boolSV (coro->flags & ix); 3683 RETVAL = boolSV (coro->flags & ix);
1435 OUTPUT: 3684 OUTPUT:
1436 RETVAL 3685 RETVAL
1437 3686
3687void
3688throw (SV *self, SV *exception = &PL_sv_undef)
3689 PROTOTYPE: $;$
3690 CODE:
3691{
3692 struct coro *coro = SvSTATE (self);
3693 struct coro *current = SvSTATE_current;
3694 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3695 SvREFCNT_dec (*exceptionp);
3696 SvGETMAGIC (exception);
3697 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3698
3699 api_ready (aTHX_ self);
3700}
3701
3702void
3703api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3704 PROTOTYPE: $;$
3705 C_ARGS: aTHX_ coro, flags
3706
1438SV * 3707SV *
1439has_stack (Coro::State coro) 3708has_cctx (Coro::State coro)
1440 PROTOTYPE: $ 3709 PROTOTYPE: $
1441 CODE: 3710 CODE:
1442 RETVAL = boolSV (!!coro->cctx); 3711 /* maybe manage the running flag differently */
3712 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1443 OUTPUT: 3713 OUTPUT:
1444 RETVAL 3714 RETVAL
1445 3715
1446IV 3716int
3717is_traced (Coro::State coro)
3718 PROTOTYPE: $
3719 CODE:
3720 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3721 OUTPUT:
3722 RETVAL
3723
3724UV
1447rss (Coro::State coro) 3725rss (Coro::State coro)
1448 PROTOTYPE: $ 3726 PROTOTYPE: $
3727 ALIAS:
3728 usecount = 1
1449 CODE: 3729 CODE:
1450 RETVAL = coro_rss (coro); 3730 switch (ix)
3731 {
3732 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3733 case 1: RETVAL = coro->usecount; break;
3734 }
1451 OUTPUT: 3735 OUTPUT:
1452 RETVAL 3736 RETVAL
1453 3737
3738void
3739force_cctx ()
3740 PROTOTYPE:
3741 CODE:
3742 cctx_current->idle_sp = 0;
3743
3744void
3745swap_defsv (Coro::State self)
3746 PROTOTYPE: $
3747 ALIAS:
3748 swap_defav = 1
3749 CODE:
3750 if (!self->slot)
3751 croak ("cannot swap state with coroutine that has no saved state,");
3752 else
3753 {
3754 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3755 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3756
3757 SV *tmp = *src; *src = *dst; *dst = tmp;
3758 }
3759
3760void
3761cancel (Coro::State self)
3762 CODE:
3763 coro_state_destroy (aTHX_ self);
3764
3765SV *
3766enable_times (int enabled = enable_times)
3767 CODE:
3768{
3769 RETVAL = boolSV (enable_times);
3770
3771 if (enabled != enable_times)
3772 {
3773 enable_times = enabled;
3774
3775 coro_times_update ();
3776 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3777 }
3778}
3779 OUTPUT:
3780 RETVAL
3781
3782void
3783times (Coro::State self)
3784 PPCODE:
3785{
3786 struct coro *current = SvSTATE (coro_current);
3787
3788 if (ecb_expect_false (current == self))
3789 {
3790 coro_times_update ();
3791 coro_times_add (SvSTATE (coro_current));
3792 }
3793
3794 EXTEND (SP, 2);
3795 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3796 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3797
3798 if (ecb_expect_false (current == self))
3799 coro_times_sub (SvSTATE (coro_current));
3800}
3801
3802void
3803swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3804 CODE:
3805{
3806 struct coro *current = SvSTATE_current;
3807
3808 if (current == coro)
3809 SWAP_SVS (current);
3810
3811 if (!coro->swap_sv)
3812 coro->swap_sv = newAV ();
3813
3814 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3815 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3816
3817 if (current == coro)
3818 SWAP_SVS (current);
3819}
3820
1454 3821
1455MODULE = Coro::State PACKAGE = Coro 3822MODULE = Coro::State PACKAGE = Coro
1456 3823
1457BOOT: 3824BOOT:
1458{ 3825{
1459 int i;
1460
1461 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3826 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1462 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3827 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3828 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3829 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1463 av_async_pool = get_av ("Coro::async_pool", TRUE); 3830 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3831 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3832 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3833 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1464 3834
1465 coro_current = get_sv ("Coro::current", FALSE); 3835 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1466 SvREADONLY_on (coro_current); 3836 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3837 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3838 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1467 3839
1468 coro_stash = gv_stashpv ("Coro", TRUE); 3840 coro_stash = gv_stashpv ("Coro", TRUE);
1469 3841
1470 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1471 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1472 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3844 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1473 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3845 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1474 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3846 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1475 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3847 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1476
1477 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1478 coro_ready[i] = newAV ();
1479 3848
1480 { 3849 {
1481 SV *sv = perl_get_sv("Coro::API", 1); 3850 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1482 3851
1483 coroapi.schedule = api_schedule; 3852 coroapi.schedule = api_schedule;
1484 coroapi.save = api_save; 3853 coroapi.schedule_to = api_schedule_to;
1485 coroapi.cede = api_cede; 3854 coroapi.cede = api_cede;
1486 coroapi.cede_notself = api_cede_notself; 3855 coroapi.cede_notself = api_cede_notself;
1487 coroapi.ready = api_ready; 3856 coroapi.ready = api_ready;
1488 coroapi.is_ready = api_is_ready; 3857 coroapi.is_ready = api_is_ready;
1489 coroapi.nready = &coro_nready; 3858 coroapi.nready = coro_nready;
1490 coroapi.current = coro_current; 3859 coroapi.current = coro_current;
1491 3860
1492 GCoroAPI = &coroapi; 3861 /*GCoroAPI = &coroapi;*/
1493 sv_setiv (sv, (IV)&coroapi); 3862 sv_setiv (sv, (IV)&coroapi);
1494 SvREADONLY_on (sv); 3863 SvREADONLY_on (sv);
1495 } 3864 }
1496} 3865}
3866
3867SV *
3868async (...)
3869 PROTOTYPE: &@
3870 CODE:
3871 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3872 api_ready (aTHX_ RETVAL);
3873 OUTPUT:
3874 RETVAL
3875
3876void
3877_destroy (Coro::State coro)
3878 CODE:
3879 /* used by the manager thread */
3880 coro_state_destroy (aTHX_ coro);
3881
3882void
3883on_destroy (Coro::State coro, SV *cb)
3884 CODE:
3885 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3886
3887void
3888join (...)
3889 CODE:
3890 CORO_EXECUTE_SLF_XS (slf_init_join);
3891
3892void
3893terminate (...)
3894 CODE:
3895 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3896
3897void
3898cancel (...)
3899 CODE:
3900 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3901
3902int
3903safe_cancel (Coro::State self, ...)
3904 C_ARGS: aTHX_ self, &ST (1), items - 1
3905
3906void
3907schedule (...)
3908 CODE:
3909 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3910
3911void
3912schedule_to (...)
3913 CODE:
3914 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3915
3916void
3917cede_to (...)
3918 CODE:
3919 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3920
3921void
3922cede (...)
3923 CODE:
3924 CORO_EXECUTE_SLF_XS (slf_init_cede);
3925
3926void
3927cede_notself (...)
3928 CODE:
3929 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1497 3930
1498void 3931void
1499_set_current (SV *current) 3932_set_current (SV *current)
1500 PROTOTYPE: $ 3933 PROTOTYPE: $
1501 CODE: 3934 CODE:
1502 SvREFCNT_dec (SvRV (coro_current)); 3935 SvREFCNT_dec (SvRV (coro_current));
1503 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3936 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3937
3938void
3939_set_readyhook (SV *hook)
3940 PROTOTYPE: $
3941 CODE:
3942 SvREFCNT_dec (coro_readyhook);
3943 SvGETMAGIC (hook);
3944 if (SvOK (hook))
3945 {
3946 coro_readyhook = newSVsv (hook);
3947 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3948 }
3949 else
3950 {
3951 coro_readyhook = 0;
3952 CORO_READYHOOK = 0;
3953 }
1504 3954
1505int 3955int
1506prio (Coro::State coro, int newprio = 0) 3956prio (Coro::State coro, int newprio = 0)
3957 PROTOTYPE: $;$
1507 ALIAS: 3958 ALIAS:
1508 nice = 1 3959 nice = 1
1509 CODE: 3960 CODE:
1510{ 3961{
1511 RETVAL = coro->prio; 3962 RETVAL = coro->prio;
… …
1513 if (items > 1) 3964 if (items > 1)
1514 { 3965 {
1515 if (ix) 3966 if (ix)
1516 newprio = coro->prio - newprio; 3967 newprio = coro->prio - newprio;
1517 3968
1518 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3969 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1519 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3970 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1520 3971
1521 coro->prio = newprio; 3972 coro->prio = newprio;
1522 } 3973 }
1523} 3974}
1524 OUTPUT: 3975 OUTPUT:
… …
1526 3977
1527SV * 3978SV *
1528ready (SV *self) 3979ready (SV *self)
1529 PROTOTYPE: $ 3980 PROTOTYPE: $
1530 CODE: 3981 CODE:
1531 RETVAL = boolSV (api_ready (self)); 3982 RETVAL = boolSV (api_ready (aTHX_ self));
1532 OUTPUT: 3983 OUTPUT:
1533 RETVAL 3984 RETVAL
1534 3985
1535int 3986int
1536nready (...) 3987nready (...)
… …
1538 CODE: 3989 CODE:
1539 RETVAL = coro_nready; 3990 RETVAL = coro_nready;
1540 OUTPUT: 3991 OUTPUT:
1541 RETVAL 3992 RETVAL
1542 3993
1543# for async_pool speedup
1544void 3994void
1545_pool_1 (SV *cb) 3995suspend (Coro::State self)
3996 PROTOTYPE: $
1546 CODE: 3997 CODE:
1547{ 3998 self->flags |= CF_SUSPENDED;
1548 int i, len;
1549 HV *hv = (HV *)SvRV (coro_current);
1550 AV *defav = GvAV (PL_defgv);
1551 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1552 AV *invoke_av;
1553 3999
1554 if (!invoke) 4000void
1555 croak ("\3terminate\2\n"); 4001resume (Coro::State self)
4002 PROTOTYPE: $
4003 CODE:
4004 self->flags &= ~CF_SUSPENDED;
1556 4005
1557 hv_store (hv, "desc", sizeof ("desc") - 1, 4006void
1558 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 4007_pool_handler (...)
4008 CODE:
4009 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1559 4010
1560 invoke_av = (AV *)SvRV (invoke); 4011void
1561 len = av_len (invoke_av); 4012async_pool (SV *cv, ...)
4013 PROTOTYPE: &@
4014 PPCODE:
4015{
4016 HV *hv = (HV *)av_pop (av_async_pool);
4017 AV *av = newAV ();
4018 SV *cb = ST (0);
4019 int i;
1562 4020
1563 sv_setsv (cb, AvARRAY (invoke_av)[0]); 4021 av_extend (av, items - 2);
4022 for (i = 1; i < items; ++i)
4023 av_push (av, SvREFCNT_inc_NN (ST (i)));
1564 4024
1565 if (len > 0) 4025 if ((SV *)hv == &PL_sv_undef)
1566 { 4026 {
1567 av_fill (defav, len - 1); 4027 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1568 for (i = 0; i < len; ++i) 4028 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1569 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4029 SvREFCNT_dec (sv);
1570 } 4030 }
1571 4031
4032 {
4033 struct coro *coro = SvSTATE_hv (hv);
4034
4035 assert (!coro->invoke_cb);
4036 assert (!coro->invoke_av);
4037 coro->invoke_cb = SvREFCNT_inc (cb);
4038 coro->invoke_av = av;
4039 }
4040
4041 api_ready (aTHX_ (SV *)hv);
4042
4043 if (GIMME_V != G_VOID)
4044 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4045 else
1572 SvREFCNT_dec (invoke); 4046 SvREFCNT_dec (hv);
1573} 4047}
1574 4048
1575void 4049SV *
1576_pool_2 (SV *cb) 4050rouse_cb ()
4051 PROTOTYPE:
1577 CODE: 4052 CODE:
1578{ 4053 RETVAL = coro_new_rouse_cb (aTHX);
1579 struct coro *coro = SvSTATE (coro_current);
1580
1581 sv_setsv (cb, &PL_sv_undef);
1582
1583 if (coro_rss (coro) > SvIV (sv_pool_rss)
1584 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1585 croak ("\3terminate\2\n");
1586
1587 av_clear (GvAV (PL_defgv));
1588 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1589 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1590 coro->save = CORO_SAVE_DEF;
1591 coro->prio = 0;
1592 av_push (av_async_pool, newSVsv (coro_current));
1593}
1594
1595
1596MODULE = Coro::State PACKAGE = Coro::AIO
1597
1598SV *
1599_get_state ()
1600 CODE:
1601{
1602 struct io_state *data;
1603
1604 RETVAL = newSV (sizeof (struct io_state));
1605 data = (struct io_state *)SvPVX (RETVAL);
1606 SvCUR_set (RETVAL, sizeof (struct io_state));
1607 SvPOK_only (RETVAL);
1608
1609 data->errorno = errno;
1610 data->laststype = PL_laststype;
1611 data->laststatval = PL_laststatval;
1612 data->statcache = PL_statcache;
1613}
1614 OUTPUT: 4054 OUTPUT:
1615 RETVAL 4055 RETVAL
1616 4056
1617void 4057void
1618_set_state (char *data_) 4058rouse_wait (...)
4059 PROTOTYPE: ;$
4060 PPCODE:
4061 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4062
4063void
4064on_enter (SV *block)
4065 ALIAS:
4066 on_leave = 1
1619 PROTOTYPE: $ 4067 PROTOTYPE: &
1620 CODE: 4068 CODE:
1621{ 4069{
1622 struct io_state *data = (void *)data_; 4070 struct coro *coro = SvSTATE_current;
4071 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1623 4072
1624 errno = data->errorno; 4073 block = s_get_cv_croak (block);
1625 PL_laststype = data->laststype;
1626 PL_laststatval = data->laststatval;
1627 PL_statcache = data->statcache;
1628}
1629 4074
4075 if (!*avp)
4076 *avp = newAV ();
4077
4078 av_push (*avp, SvREFCNT_inc (block));
4079
4080 if (!ix)
4081 on_enterleave_call (aTHX_ block);
4082
4083 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4084 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4085 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4086}
4087
4088
4089MODULE = Coro::State PACKAGE = PerlIO::cede
4090
4091BOOT:
4092 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4093
4094
4095MODULE = Coro::State PACKAGE = Coro::Semaphore
4096
4097SV *
4098new (SV *klass, SV *count = 0)
4099 CODE:
4100{
4101 int semcnt = 1;
4102
4103 if (count)
4104 {
4105 SvGETMAGIC (count);
4106
4107 if (SvOK (count))
4108 semcnt = SvIV (count);
4109 }
4110
4111 RETVAL = sv_bless (
4112 coro_waitarray_new (aTHX_ semcnt),
4113 GvSTASH (CvGV (cv))
4114 );
4115}
4116 OUTPUT:
4117 RETVAL
4118
4119# helper for Coro::Channel and others
4120SV *
4121_alloc (int count)
4122 CODE:
4123 RETVAL = coro_waitarray_new (aTHX_ count);
4124 OUTPUT:
4125 RETVAL
4126
4127SV *
4128count (SV *self)
4129 CODE:
4130 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4131 OUTPUT:
4132 RETVAL
4133
4134void
4135up (SV *self, int adjust = 1)
4136 ALIAS:
4137 adjust = 1
4138 CODE:
4139 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4140
4141void
4142down (...)
4143 CODE:
4144 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4145
4146void
4147wait (...)
4148 CODE:
4149 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4150
4151void
4152try (SV *self)
4153 PPCODE:
4154{
4155 AV *av = (AV *)SvRV (self);
4156 SV *count_sv = AvARRAY (av)[0];
4157 IV count = SvIVX (count_sv);
4158
4159 if (count > 0)
4160 {
4161 --count;
4162 SvIVX (count_sv) = count;
4163 XSRETURN_YES;
4164 }
4165 else
4166 XSRETURN_NO;
4167}
4168
4169void
4170waiters (SV *self)
4171 PPCODE:
4172{
4173 AV *av = (AV *)SvRV (self);
4174 int wcount = AvFILLp (av) + 1 - 1;
4175
4176 if (GIMME_V == G_SCALAR)
4177 XPUSHs (sv_2mortal (newSViv (wcount)));
4178 else
4179 {
4180 int i;
4181 EXTEND (SP, wcount);
4182 for (i = 1; i <= wcount; ++i)
4183 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4184 }
4185}
4186
4187MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4188
4189void
4190_may_delete (SV *sem, int count, unsigned int extra_refs)
4191 PPCODE:
4192{
4193 AV *av = (AV *)SvRV (sem);
4194
4195 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4196 && AvFILLp (av) == 0 /* no waiters, just count */
4197 && SvIV (AvARRAY (av)[0]) == count)
4198 XSRETURN_YES;
4199
4200 XSRETURN_NO;
4201}
4202
4203MODULE = Coro::State PACKAGE = Coro::Signal
4204
4205SV *
4206new (SV *klass)
4207 CODE:
4208 RETVAL = sv_bless (
4209 coro_waitarray_new (aTHX_ 0),
4210 GvSTASH (CvGV (cv))
4211 );
4212 OUTPUT:
4213 RETVAL
4214
4215void
4216wait (...)
4217 CODE:
4218 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4219
4220void
4221broadcast (SV *self)
4222 CODE:
4223{
4224 AV *av = (AV *)SvRV (self);
4225 coro_signal_wake (aTHX_ av, AvFILLp (av));
4226}
4227
4228void
4229send (SV *self)
4230 CODE:
4231{
4232 AV *av = (AV *)SvRV (self);
4233
4234 if (AvFILLp (av))
4235 coro_signal_wake (aTHX_ av, 1);
4236 else
4237 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4238}
4239
4240IV
4241awaited (SV *self)
4242 CODE:
4243 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4244 OUTPUT:
4245 RETVAL
4246
4247
4248MODULE = Coro::State PACKAGE = Coro::AnyEvent
4249
4250BOOT:
4251 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4252
4253void
4254_schedule (...)
4255 CODE:
4256{
4257 static int incede;
4258
4259 api_cede_notself (aTHX);
4260
4261 ++incede;
4262 while (coro_nready >= incede && api_cede (aTHX))
4263 ;
4264
4265 sv_setsv (sv_activity, &PL_sv_undef);
4266 if (coro_nready >= incede)
4267 {
4268 PUSHMARK (SP);
4269 PUTBACK;
4270 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4271 }
4272
4273 --incede;
4274}
4275
4276
4277MODULE = Coro::State PACKAGE = Coro::AIO
4278
4279void
4280_register (char *target, char *proto, SV *req)
4281 CODE:
4282{
4283 SV *req_cv = s_get_cv_croak (req);
4284 /* newXSproto doesn't return the CV on 5.8 */
4285 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4286 sv_setpv ((SV *)slf_cv, proto);
4287 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4288}
4289
4290MODULE = Coro::State PACKAGE = Coro::Select
4291
4292void
4293patch_pp_sselect ()
4294 CODE:
4295 if (!coro_old_pp_sselect)
4296 {
4297 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4298 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4299 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4300 }
4301
4302void
4303unpatch_pp_sselect ()
4304 CODE:
4305 if (coro_old_pp_sselect)
4306 {
4307 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4308 coro_old_pp_sselect = 0;
4309 }
4310
4311MODULE = Coro::State PACKAGE = Coro::Util
4312
4313void
4314_exit (int code)
4315 CODE:
4316 _exit (code);
4317
4318NV
4319time ()
4320 CODE:
4321 RETVAL = nvtime (aTHX);
4322 OUTPUT:
4323 RETVAL
4324
4325NV
4326gettimeofday ()
4327 PPCODE:
4328{
4329 UV tv [2];
4330 u2time (aTHX_ tv);
4331 EXTEND (SP, 2);
4332 PUSHs (sv_2mortal (newSVuv (tv [0])));
4333 PUSHs (sv_2mortal (newSVuv (tv [1])));
4334}
4335

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