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Comparing Coro/Coro/State.xs (file contents):
Revision 1.217 by root, Wed Nov 14 11:32:56 2007 UTC vs.
Revision 1.443 by root, Thu Mar 6 06:40:32 2014 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
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
11 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
12#include <stdio.h> 23#include <stdio.h>
13#include <errno.h> 24#include <errno.h>
14#include <assert.h> 25#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
16 26
17#ifdef HAVE_MMAP 27#ifndef SVs_PADSTALE
18# include <unistd.h> 28# define SVs_PADSTALE 0
19# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS
21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
23# else
24# undef HAVE_MMAP
25# 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;
26# endif 39# endif
27# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
28# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
29# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
31static long pagesize; 44# define PadMAX AvFILLp
32# else 45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
33# define BOOT_PAGESIZE (void)0
34# endif 46#endif
47
48/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
49/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
50#if PERL_VERSION_ATLEAST(5,19,0)
51# define SVt_BIND SVt_IV
52#endif
53
54#if defined(_WIN32)
55# undef HAS_GETTIMEOFDAY
56# undef setjmp
57# undef longjmp
58# undef _exit
59# define setjmp _setjmp /* deep magic */
35#else 60#else
36# define PAGESIZE 0 61# include <inttypes.h> /* most portable stdint.h */
37# define BOOT_PAGESIZE (void)0
38#endif
39
40#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 62#endif
46 63
47/* the maximum number of idle cctx that will be pooled */ 64/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 65static int cctx_max_idle = 4;
49 66
50#define PERL_VERSION_ATLEAST(a,b,c) \ 67#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
51 (PERL_REVISION > (a) \ 68# define HAS_SCOPESTACK_NAME 1
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.7 */
78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD
92#endif
93
94#ifndef CORO_STACKGUARD
95# define CORO_STACKGUARD 0
96#endif 69#endif
97 70
98/* prefer perl internal functions over our own? */ 71/* prefer perl internal functions over our own? */
99#ifndef CORO_PREFER_PERL_FUNCTIONS 72#ifndef CORO_PREFER_PERL_FUNCTIONS
100# define CORO_PREFER_PERL_FUNCTIONS 0 73# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 74#endif
102 75
103/* The next macros try to return the current stack pointer, in an as 76/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 77 * portable way as possible. */
105#define dSTACKLEVEL volatile char stacklevel
106#define STACKLEVEL ((void *)&stacklevel)
107
108#define IN_DESTRUCT (PL_main_cv == Nullcv)
109
110#if __GNUC__ >= 3 78#if __GNUC__ >= 4
111# define attribute(x) __attribute__(x) 79# define dSTACKLEVEL int stacklevel_dummy
112# define BARRIER __asm__ __volatile__ ("" : : : "memory") 80# define STACKLEVEL __builtin_frame_address (0)
113# define expect(expr,value) __builtin_expect ((expr),(value))
114#else 81#else
115# define attribute(x) 82# define dSTACKLEVEL volatile void *stacklevel
116# define BARRIER 83# define STACKLEVEL ((void *)&stacklevel)
117# define expect(expr,value) (expr)
118#endif 84#endif
119 85
120#define expect_false(expr) expect ((expr) != 0, 0) 86#define IN_DESTRUCT PL_dirty
121#define expect_true(expr) expect ((expr) != 0, 1)
122
123#define NOINLINE attribute ((noinline))
124 87
125#include "CoroAPI.h" 88#include "CoroAPI.h"
89#define GCoroAPI (&coroapi) /* very sneaky */
126 90
127#ifdef USE_ITHREADS 91#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 92# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 93static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 94# endif
95#endif
135 96
136/* helper storage struct for Coro::AIO */ 97#ifdef __linux
137struct io_state 98# include <time.h> /* for timespec */
138{ 99# include <syscall.h> /* for SYS_* */
139 int errorno; 100# ifdef SYS_clock_gettime
140 I32 laststype; 101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
141 int laststatval; 102# define CORO_CLOCK_MONOTONIC 1
142 Stat_t statcache; 103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
143}; 104# endif
105#endif
144 106
107static double (*nvtime)(); /* so why doesn't it take void? */
108static void (*u2time)(pTHX_ UV ret[2]);
109
110/* we hijack an hopefully unused CV flag for our purposes */
111#define CVf_SLF 0x4000
112static OP *pp_slf (pTHX);
113static void slf_destroy (pTHX_ struct coro *coro);
114
115static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 116static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 118static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 119static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 120static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */ 121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
122
123static AV *av_destroy; /* destruction queue */
124static SV *sv_manager; /* the manager coro */
125static SV *sv_idle; /* $Coro::idle */
151 126
152static GV *irsgv; /* $/ */ 127static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 128static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook; 129static SV *rv_diehook;
155static SV *rv_warnhook; 130static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 131static HV *hv_sig; /* %SIG */
157 132
158/* async_pool helper stuff */ 133/* async_pool helper stuff */
159static SV *sv_pool_rss; 134static SV *sv_pool_rss;
160static SV *sv_pool_size; 135static SV *sv_pool_size;
136static SV *sv_async_pool_idle; /* description string */
161static AV *av_async_pool; 137static AV *av_async_pool; /* idle pool */
138static SV *sv_Coro; /* class string */
139static CV *cv_pool_handler;
140
141/* Coro::AnyEvent */
142static SV *sv_activity;
143
144/* enable processtime/realtime profiling */
145static char enable_times;
146typedef U32 coro_ts[2];
147static coro_ts time_real, time_cpu;
148static char times_valid;
162 149
163static struct coro_cctx *cctx_first; 150static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle; 151static int cctx_count, cctx_idle;
165 152
166enum { 153enum
154{
167 CC_MAPPED = 0x01, 155 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */ 156 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04, 157 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */ 158 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */ 159 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 160 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173}; 161};
174 162
175/* this is a structure representing a c-level coroutine */ 163/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx { 164typedef struct coro_cctx
165{
177 struct coro_cctx *next; 166 struct coro_cctx *next;
178 167
179 /* the stack */ 168 /* the stack */
180 void *sptr; 169 struct coro_stack stack;
181 size_t ssize;
182 170
183 /* cpu state */ 171 /* cpu state */
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 172 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
173#ifndef NDEBUG
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 174 JMPENV *idle_te; /* same as idle_sp, but for top_env */
175#endif
186 JMPENV *top_env; 176 JMPENV *top_env;
187 coro_context cctx; 177 coro_context cctx;
188 178
179 U32 gen;
189#if CORO_USE_VALGRIND 180#if CORO_USE_VALGRIND
190 int valgrind_id; 181 int valgrind_id;
191#endif 182#endif
192 unsigned char flags; 183 unsigned char flags;
193} coro_cctx; 184} coro_cctx;
194 185
186static coro_cctx *cctx_current; /* the currently running cctx */
187
188/*****************************************************************************/
189
190static MGVTBL coro_state_vtbl;
191
195enum { 192enum
193{
196 CF_RUNNING = 0x0001, /* coroutine is running */ 194 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */ 195 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */ 196 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 197 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
198 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
199 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200}; 200};
201 201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */ 202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct { 203typedef struct
204 SV *defsv; 204{
205 AV *defav;
206 SV *errsv;
207 SV *irsgv;
208#define VAR(name,type) type name; 205 #define VARx(name,expr,type) type name;
209# include "state.h" 206 #include "state.h"
210#undef VAR
211} perl_slots; 207} perl_slots;
212 208
209/* how many context stack entries do we need for perl_slots */
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 210#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214 211
215/* this is a structure representing a perl-level coroutine */ 212/* this is a structure representing a perl-level coroutine */
216struct coro { 213struct coro
214{
217 /* the c coroutine allocated to this perl coroutine, if any */ 215 /* the C coroutine allocated to this perl coroutine, if any */
218 coro_cctx *cctx; 216 coro_cctx *cctx;
219 217
220 /* process data */ 218 /* ready queue */
219 struct coro *next_ready;
220
221 /* state data */
222 struct CoroSLF slf_frame; /* saved slf frame */
221 AV *mainstack; 223 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */ 224 perl_slots *slot; /* basically the saved sp */
223 225
226 CV *startcv; /* the CV to execute */
224 AV *args; /* data associated with this coroutine (initial args) */ 227 AV *args; /* data associated with this coroutine (initial args) */
225 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */ 228 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */ 229 HV *hv; /* the perl hash associated with this coro, if any */
228 230
229 /* statistics */ 231 /* statistics */
230 int usecount; /* number of transfers to this coro */ 232 int usecount; /* number of transfers to this coro */
231 233
232 /* coro process data */ 234 /* coro process data */
233 int prio; 235 int prio;
234 SV *throw; /* exception to be thrown */ 236 SV *except; /* exception to be thrown */
237 SV *rouse_cb; /* last rouse callback */
238 AV *on_destroy; /* callbacks or coros to notify on destroy */
239 AV *status; /* the exit status list */
235 240
236 /* async_pool */ 241 /* async_pool */
237 SV *saved_deffh; 242 SV *saved_deffh;
243 SV *invoke_cb;
244 AV *invoke_av;
245
246 /* on_enter/on_leave */
247 AV *on_enter;
248 AV *on_leave;
249
250 /* swap_sv */
251 AV *swap_sv;
252
253 /* times */
254 coro_ts t_cpu, t_real;
238 255
239 /* linked list */ 256 /* linked list */
240 struct coro *next, *prev; 257 struct coro *next, *prev;
241}; 258};
242 259
243typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
244typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
245 262
263/* the following variables are effectively part of the perl context */
264/* and get copied between struct coro and these variables */
265/* the main reason we don't support windows process emulation */
266static struct CoroSLF slf_frame; /* the current slf frame */
267
246/** Coro ********************************************************************/ 268/** Coro ********************************************************************/
247 269
248#define PRIO_MAX 3 270#define CORO_PRIO_MAX 3
249#define PRIO_HIGH 1 271#define CORO_PRIO_HIGH 1
250#define PRIO_NORMAL 0 272#define CORO_PRIO_NORMAL 0
251#define PRIO_LOW -1 273#define CORO_PRIO_LOW -1
252#define PRIO_IDLE -3 274#define CORO_PRIO_IDLE -3
253#define PRIO_MIN -4 275#define CORO_PRIO_MIN -4
254 276
255/* for Coro.pm */ 277/* for Coro.pm */
256static SV *coro_current; 278static SV *coro_current;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 279static SV *coro_readyhook;
258static int coro_nready; 280static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
281static CV *cv_coro_run;
259static struct coro *coro_first; 282static struct coro *coro_first;
283#define coro_nready coroapi.nready
284
285/** JIT *********************************************************************/
286
287#if CORO_JIT
288 /* APPLE doesn't have mmap though */
289 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
290 #ifndef CORO_JIT_TYPE
291 #if ECB_AMD64 && CORO_JIT_UNIXY
292 #define CORO_JIT_TYPE "amd64-unix"
293 #elif __i386 && CORO_JIT_UNIXY
294 #define CORO_JIT_TYPE "x86-unix"
295 #endif
296 #endif
297#endif
298
299#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
300 #undef CORO_JIT
301#endif
302
303#if CORO_JIT
304 typedef void (*load_save_perl_slots_type)(perl_slots *);
305 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
306#endif
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332ecb_inline void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342ecb_inline double
343coro_nvtime (void)
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351ecb_inline void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360ecb_inline void
361time_init (pTHX)
362{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
260 379
261/** lowlevel stuff **********************************************************/ 380/** lowlevel stuff **********************************************************/
262 381
263static SV * 382static SV * ecb_noinline
264coro_get_sv (pTHX_ const char *name, int create) 383coro_get_sv (pTHX_ const char *name, int create)
265{ 384{
266#if PERL_VERSION_ATLEAST (5,9,0) 385#if PERL_VERSION_ATLEAST (5,10,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create); 387 get_sv (name, create);
269#endif 388#endif
270 return get_sv (name, create); 389 return get_sv (name, create);
271} 390}
272 391
273static AV * 392static AV * ecb_noinline
274coro_get_av (pTHX_ const char *name, int create) 393coro_get_av (pTHX_ const char *name, int create)
275{ 394{
276#if PERL_VERSION_ATLEAST (5,9,0) 395#if PERL_VERSION_ATLEAST (5,10,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create); 397 get_av (name, create);
279#endif 398#endif
280 return get_av (name, create); 399 return get_av (name, create);
281} 400}
282 401
283static HV * 402static HV * ecb_noinline
284coro_get_hv (pTHX_ const char *name, int create) 403coro_get_hv (pTHX_ const char *name, int create)
285{ 404{
286#if PERL_VERSION_ATLEAST (5,9,0) 405#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create); 407 get_hv (name, create);
289#endif 408#endif
290 return get_hv (name, create); 409 return get_hv (name, create);
291} 410}
292 411
293static AV * 412ecb_inline void
413coro_times_update (void)
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435ecb_inline void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447ecb_inline void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (ecb_expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478ecb_inline MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (ecb_expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493ecb_inline struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (aTHX_ coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517ecb_inline PADLIST *
294coro_clone_padlist (pTHX_ CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
295{ 519{
296 AV *padlist = CvPADLIST (cv); 520 PADLIST *padlist = CvPADLIST (cv);
297 AV *newpadlist, *newpad; 521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
298 524
299 newpadlist = newAV (); 525#if NEWPADAPI
526
527 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
528 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
529 while (!PadlistARRAY (padlist)[off - 1])
530 --off;
531
532 Perl_pad_push (aTHX_ padlist, off);
533
534 newpad = PadlistARRAY (padlist)[off];
535 PadlistARRAY (padlist)[off] = 0;
536
537#else
538
539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, off);
541#else
542 Perl_pad_push (aTHX_ padlist, off, 1);
543#endif
544
545 newpad = PadlistARRAY (padlist)[off];
546 PadlistMAX (padlist) = off - 1;
547
548#endif
549
550 newPADLIST (newpadlist);
551#if !PERL_VERSION_ATLEAST(5,15,3)
552 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
300 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
301#if PERL_VERSION_ATLEAST (5,9,0)
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
303#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif 554#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist);
308 555
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 556 /* Already extended to 2 elements by newPADLIST. */
310 av_store (newpadlist, 1, (SV *)newpad); 557 PadlistMAX (newpadlist) = 1;
558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
559 PadlistARRAY (newpadlist)[1] = newpad;
311 560
312 return newpadlist; 561 return newpadlist;
313} 562}
314 563
315static void 564ecb_inline void
316free_padlist (pTHX_ AV *padlist) 565free_padlist (pTHX_ PADLIST *padlist)
317{ 566{
318 /* may be during global destruction */ 567 /* may be during global destruction */
319 if (SvREFCNT (padlist)) 568 if (!IN_DESTRUCT)
320 { 569 {
321 I32 i = AvFILLp (padlist); 570 I32 i = PadlistMAX (padlist);
322 while (i >= 0) 571
572 while (i > 0) /* special-case index 0 */
323 { 573 {
324 SV **svp = av_fetch (padlist, i--, FALSE); 574 /* we try to be extra-careful here */
575 PAD *pad = PadlistARRAY (padlist)[i--];
576
325 if (svp) 577 if (pad)
326 { 578 {
327 SV *sv; 579 I32 j = PadMAX (pad);
328 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 580
581 while (j >= 0)
329 SvREFCNT_dec (sv); 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
330 583
584 PadMAX (pad) = -1;
331 SvREFCNT_dec (*svp); 585 SvREFCNT_dec (pad);
332 } 586 }
333 } 587 }
334 588
589 SvREFCNT_dec (PadlistNAMES (padlist));
590
591#if NEWPADAPI
592 Safefree (PadlistARRAY (padlist));
593 Safefree (padlist);
594#else
595 AvFILLp (padlist) = -1;
596 AvREAL_off (padlist);
335 SvREFCNT_dec ((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
336 } 599 }
337} 600}
338 601
339static int 602static int
340coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
341{ 604{
342 AV *padlist; 605 PADLIST *padlist;
343 AV *av = (AV *)mg->mg_obj; 606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
344 608
345 /* casting is fun. */ 609 /* perl manages to free our internal AV and _then_ call us */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
347 free_padlist (aTHX_ padlist); 614 free_padlist (aTHX_ padlists[len]);
348 615
349 return 0; 616 return 0;
350} 617}
351
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353#define CORO_MAGIC_type_state PERL_MAGIC_ext
354 618
355static MGVTBL coro_cv_vtbl = { 619static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0, 620 0, 0, 0, 0,
357 coro_cv_free 621 coro_cv_free
358}; 622};
359 623
360#define CORO_MAGIC(sv,type) \
361 SvMAGIC (sv) \
362 ? SvMAGIC (sv)->mg_type == type \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0
366
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370static struct coro *
371SvSTATE_ (pTHX_ SV *coro)
372{
373 HV *stash;
374 MAGIC *mg;
375
376 if (SvROK (coro))
377 coro = SvRV (coro);
378
379 if (expect_false (SvTYPE (coro) != SVt_PVHV))
380 croak ("Coro::State object required");
381
382 stash = SvSTASH (coro);
383 if (expect_false (stash != coro_stash && stash != coro_state_stash))
384 {
385 /* very slow, but rare, check */
386 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387 croak ("Coro::State object required");
388 }
389
390 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr;
392}
393
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
395
396/* the next two functions merely cache the padlists */ 624/* the next two functions merely cache the padlists */
397static void 625ecb_inline void
398get_padlist (pTHX_ CV *cv) 626get_padlist (pTHX_ CV *cv)
399{ 627{
400 MAGIC *mg = CORO_MAGIC_cv (cv); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
401 AV *av; 629 size_t *lenp;
402 630
403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
405 else 633 else
406 { 634 {
407#if CORO_PREFER_PERL_FUNCTIONS 635#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */ 636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
409 CV *cp = Perl_cv_clone (cv); 638 CV *cp = Perl_cv_clone (aTHX_ cv);
410 CvPADLIST (cv) = CvPADLIST (cp); 639 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0; 640 CvPADLIST (cp) = 0;
412 SvREFCNT_dec (cp); 641 SvREFCNT_dec (cp);
413#else 642#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
415#endif 644#endif
416 } 645 }
417} 646}
418 647
419static void 648ecb_inline void
420put_padlist (pTHX_ CV *cv) 649put_padlist (pTHX_ CV *cv)
421{ 650{
422 MAGIC *mg = CORO_MAGIC_cv (cv); 651 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
424 652
425 if (expect_false (!mg)) 653 if (ecb_expect_false (!mg))
654 {
426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 655 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
656 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
657 mg->mg_len = 1; /* so mg_free frees mg_ptr */
658 }
659 else
660 Renew (mg->mg_ptr,
661 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
662 char);
427 663
428 av = (AV *)mg->mg_obj; 664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
429
430 if (expect_false (AvFILLp (av) >= AvMAX (av)))
431 av_extend (av, AvMAX (av) + 1);
432
433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
434} 665}
435 666
436/** load & save, init *******************************************************/ 667/** load & save, init *******************************************************/
668
669ecb_inline void
670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
674
675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
677
678 /* swap sv_flags */
679 SvFLAGS (&tmp) = SvFLAGS (a);
680 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
681 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
682
683#if PERL_VERSION_ATLEAST (5,10,0)
684 /* perl 5.10 and later complicates this _quite_ a bit, but it also
685 * is much faster, so no quarrels here. alternatively, we could
686 * sv_upgrade to avoid this.
687 */
688 {
689 /* swap sv_u */
690 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
691
692 /* if SvANY points to the head, we need to adjust the pointers,
693 * as the pointer for a still points to b, and maybe vice versa.
694 */
695 #define svany_in_head(type) \
696 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
697
698 if (svany_in_head (SvTYPE (a)))
699 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
700
701 if (svany_in_head (SvTYPE (b)))
702 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
703 }
704#endif
705}
706
707/* swap sv heads, at least logically */
708static void
709swap_svs (pTHX_ Coro__State c)
710{
711 int i;
712
713 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
714 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
715}
716
717#define SWAP_SVS(coro) \
718 if (ecb_expect_false ((coro)->swap_sv)) \
719 swap_svs (aTHX_ (coro))
720
721static void
722on_enterleave_call (pTHX_ SV *cb);
437 723
438static void 724static void
439load_perl (pTHX_ Coro__State c) 725load_perl (pTHX_ Coro__State c)
440{ 726{
441 perl_slots *slot = c->slot; 727 perl_slots *slot = c->slot;
442 c->slot = 0; 728 c->slot = 0;
443 729
444 PL_mainstack = c->mainstack; 730 PL_mainstack = c->mainstack;
445 731
446 GvSV (PL_defgv) = slot->defsv; 732#if CORO_JIT
447 GvAV (PL_defgv) = slot->defav; 733 load_perl_slots (slot);
448 GvSV (PL_errgv) = slot->errsv; 734#else
449 GvSV (irsgv) = slot->irsgv;
450
451 #define VAR(name,type) PL_ ## name = slot->name; 735 #define VARx(name,expr,type) expr = slot->name;
452 # include "state.h" 736 #include "state.h"
453 #undef VAR 737#endif
454 738
455 { 739 {
456 dSP; 740 dSP;
457 741
458 CV *cv; 742 CV *cv;
459 743
460 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
461 while (expect_true (cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
462 { 746 {
463 put_padlist (aTHX_ cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
464 CvDEPTH (cv) = PTR2IV (POPs); 748 CvDEPTH (cv) = PTR2IV (POPs);
465 CvPADLIST (cv) = (AV *)POPs; 749 CvPADLIST (cv) = (PADLIST *)POPs;
466 } 750 }
467 751
468 PUTBACK; 752 PUTBACK;
469 } 753 }
754
755 slf_frame = c->slf_frame;
756 CORO_THROW = c->except;
757
758 if (ecb_expect_false (enable_times))
759 {
760 if (ecb_expect_false (!times_valid))
761 coro_times_update ();
762
763 coro_times_sub (c);
764 }
765
766 if (ecb_expect_false (c->on_enter))
767 {
768 int i;
769
770 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
771 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
772 }
773
774 SWAP_SVS (c);
470} 775}
471 776
472static void 777static void
473save_perl (pTHX_ Coro__State c) 778save_perl (pTHX_ Coro__State c)
474{ 779{
780 SWAP_SVS (c);
781
782 if (ecb_expect_false (c->on_leave))
783 {
784 int i;
785
786 for (i = AvFILLp (c->on_leave); i >= 0; --i)
787 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
788 }
789
790 times_valid = 0;
791
792 if (ecb_expect_false (enable_times))
793 {
794 coro_times_update (); times_valid = 1;
795 coro_times_add (c);
796 }
797
798 c->except = CORO_THROW;
799 c->slf_frame = slf_frame;
800
475 { 801 {
476 dSP; 802 dSP;
477 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
478 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
479 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
485 811
486 XPUSHs (Nullsv); 812 XPUSHs (Nullsv);
487 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
488 for (;;) 814 for (;;)
489 { 815 {
490 while (expect_true (cxix >= 0)) 816 while (ecb_expect_true (cxix >= 0))
491 { 817 {
492 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
493 819
494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
495 { 821 {
496 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
497 823
498 if (expect_true (CvDEPTH (cv))) 824 if (ecb_expect_true (CvDEPTH (cv)))
499 { 825 {
500 EXTEND (SP, 3); 826 EXTEND (SP, 3);
501 PUSHs ((SV *)CvPADLIST (cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
504 830
505 CvDEPTH (cv) = 0; 831 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv); 832 get_padlist (aTHX_ cv);
507 } 833 }
508 } 834 }
509 } 835 }
510 836
511 if (expect_true (top_si->si_type == PERLSI_MAIN)) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
512 break; 838 break;
513 839
514 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
515 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
516 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
… …
518 844
519 PUTBACK; 845 PUTBACK;
520 } 846 }
521 847
522 /* allocate some space on the context stack for our purposes */ 848 /* allocate some space on the context stack for our purposes */
523 /* we manually unroll here, as usually 2 slots is enough */ 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
524 if (SLOT_COUNT >= 1) CXINC;
525 if (SLOT_COUNT >= 2) CXINC;
526 if (SLOT_COUNT >= 3) CXINC;
527 { 850 {
528 int i; 851 unsigned int i;
852
529 for (i = 3; i < SLOT_COUNT; ++i) 853 for (i = 0; i < SLOT_COUNT; ++i)
530 CXINC; 854 CXINC;
531 } 855
532 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
857 }
533 858
534 c->mainstack = PL_mainstack; 859 c->mainstack = PL_mainstack;
535 860
536 { 861 {
537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
538 863
539 slot->defav = GvAV (PL_defgv); 864#if CORO_JIT
540 slot->defsv = DEFSV; 865 save_perl_slots (slot);
541 slot->errsv = ERRSV; 866#else
542 slot->irsgv = GvSV (irsgv);
543
544 #define VAR(name,type) slot->name = PL_ ## name; 867 #define VARx(name,expr,type) slot->name = expr;
545 # include "state.h" 868 #include "state.h"
546 #undef VAR 869#endif
547 } 870 }
548} 871}
549 872
550/* 873/*
551 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
552 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
553 * on the (sometimes correct) assumption that coroutines do 876 * on the (sometimes correct) assumption that coroutines do
554 * not usually need a lot of stackspace. 877 * not usually need a lot of stackspace.
555 */ 878 */
556#if CORO_PREFER_PERL_FUNCTIONS 879#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks 880# define coro_init_stacks(thx) init_stacks ()
558#else 881#else
559static void 882static void
560coro_init_stacks (pTHX) 883coro_init_stacks (pTHX)
561{ 884{
562 PL_curstackinfo = new_stackinfo(32, 8); 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
563 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
564 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
566 889
567 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
… …
582#endif 905#endif
583 906
584 New(54,PL_scopestack,8,I32); 907 New(54,PL_scopestack,8,I32);
585 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
586 PL_scopestack_max = 8; 909 PL_scopestack_max = 8;
910#if HAS_SCOPESTACK_NAME
911 New(54,PL_scopestack_name,8,const char*);
912#endif
587 913
588 New(54,PL_savestack,24,ANY); 914 New(54,PL_savestack,24,ANY);
589 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
590 PL_savestack_max = 24; 916 PL_savestack_max = 24;
591 917
592#if !PERL_VERSION_ATLEAST (5,9,0) 918#if !PERL_VERSION_ATLEAST (5,10,0)
593 New(54,PL_retstack,4,OP*); 919 New(54,PL_retstack,4,OP*);
594 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
595 PL_retstack_max = 4; 921 PL_retstack_max = 4;
596#endif 922#endif
597} 923}
… …
599 925
600/* 926/*
601 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
602 */ 928 */
603static void 929static void
604coro_destroy_stacks (pTHX) 930coro_destruct_stacks (pTHX)
605{ 931{
606 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
607 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
608 934
609 while (PL_curstackinfo) 935 while (PL_curstackinfo)
… …
619 } 945 }
620 946
621 Safefree (PL_tmps_stack); 947 Safefree (PL_tmps_stack);
622 Safefree (PL_markstack); 948 Safefree (PL_markstack);
623 Safefree (PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
624 Safefree (PL_savestack); 953 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0) 954#if !PERL_VERSION_ATLEAST (5,10,0)
626 Safefree (PL_retstack); 955 Safefree (PL_retstack);
627#endif 956#endif
628} 957}
958
959#define CORO_RSS \
960 rss += sizeof (SYM (curstackinfo)); \
961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
962 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
963 rss += SYM (tmps_max) * sizeof (SV *); \
964 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
965 rss += SYM (scopestack_max) * sizeof (I32); \
966 rss += SYM (savestack_max) * sizeof (ANY);
629 967
630static size_t 968static size_t
631coro_rss (pTHX_ struct coro *coro) 969coro_rss (pTHX_ struct coro *coro)
632{ 970{
633 size_t rss = sizeof (*coro); 971 size_t rss = sizeof (*coro);
634 972
635 if (coro->mainstack) 973 if (coro->mainstack)
636 { 974 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING) 975 if (coro->flags & CF_RUNNING)
641 { 976 {
642 slot = &tmp_slot; 977 #define SYM(sym) PL_ ## sym
643 978 CORO_RSS;
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR 979 #undef SYM
647 } 980 }
648 else 981 else
649 slot = coro->slot; 982 {
650 983 #define SYM(sym) coro->slot->sym
651 rss += sizeof (slot->curstackinfo); 984 CORO_RSS;
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 985 #undef SYM
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 986 }
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 } 987 }
663 988
664 return rss; 989 return rss;
665} 990}
666 991
667/** coroutine stack handling ************************************************/ 992/** coroutine stack handling ************************************************/
668 993
669#if 0
670static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 994static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
996static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
997
998/* apparently < 5.8.8 */
999#ifndef MgPV_nolen_const
1000#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1001 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1002 (const char*)(mg)->mg_ptr)
1003#endif
671 1004
672/* 1005/*
673 * This overrides the default magic get method of %SIG elements. 1006 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 1007 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide 1008 * and instead of trying to save and restore the hash elements (extremely slow),
676 * readback here. 1009 * we just provide our own readback here.
677 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
678 * not expecting this to actually change the hook. This is a potential problem
679 * when a schedule happens then, but we ignore this.
680 */ 1010 */
1011static int ecb_cold
1012coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *ssv;
1026
1027 if (!*svp)
1028 ssv = &PL_sv_undef;
1029 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1030 ssv = sv_2mortal (newRV_inc (*svp));
1031 else
1032 ssv = *svp;
1033
1034 sv_setsv (sv, ssv);
1035 return 0;
1036 }
1037 }
1038
1039 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1040}
1041
1042static int ecb_cold
1043coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1044{
1045 const char *s = MgPV_nolen_const (mg);
1046
1047 if (*s == '_')
1048 {
1049 SV **svp = 0;
1050
1051 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1052 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1053
1054 if (svp)
1055 {
1056 SV *old = *svp;
1057 *svp = 0;
1058 SvREFCNT_dec (old);
1059 return 0;
1060 }
1061 }
1062
1063 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1064}
1065
1066static int ecb_cold
1067coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1068{
1069 const char *s = MgPV_nolen_const (mg);
1070
1071 if (*s == '_')
1072 {
1073 SV **svp = 0;
1074
1075 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1076 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1077
1078 if (svp)
1079 {
1080 SV *old = *svp;
1081 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1082 SvREFCNT_dec (old);
1083 return 0;
1084 }
1085 }
1086
1087 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1088}
1089
1090static void
1091prepare_nop (pTHX_ struct coro_transfer_args *ta)
1092{
1093 /* kind of mega-hacky, but works */
1094 ta->next = ta->prev = (struct coro *)ta;
1095}
1096
681static int 1097static int
682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 1098slf_check_nop (pTHX_ struct CoroSLF *frame)
683{ 1099{
684 return orig_sigelem_get (aTHX_ sv, mg); 1100 return 0;
685 const char *s = MgPV_nolen_const (mg);
686
687 if (*s == '_')
688 {
689 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
690 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
691 }
692
693 return orig_sigelem_get (aTHX_ sv, mg);
694} 1101}
695#endif
696 1102
697static void 1103static int
1104slf_check_repeat (pTHX_ struct CoroSLF *frame)
1105{
1106 return 1;
1107}
1108
1109static UNOP init_perl_op;
1110
1111ecb_noinline static void /* noinline to keep it out of the transfer fast path */
698coro_setup (pTHX_ struct coro *coro) 1112init_perl (pTHX_ struct coro *coro)
699{ 1113{
700 /* 1114 /*
701 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
702 */ 1116 */
703 coro_init_stacks (aTHX); 1117 coro_init_stacks (aTHX);
704 1118
705 PL_runops = RUNOPS_DEFAULT; 1119 PL_runops = RUNOPS_DEFAULT;
706 PL_curcop = &PL_compiling; 1120 PL_curcop = &PL_compiling;
707 PL_in_eval = EVAL_NULL; 1121 PL_in_eval = EVAL_NULL;
708 PL_comppad = 0; 1122 PL_comppad = 0;
1123 PL_comppad_name = 0;
1124 PL_comppad_name_fill = 0;
1125 PL_comppad_name_floor = 0;
709 PL_curpm = 0; 1126 PL_curpm = 0;
710 PL_curpad = 0; 1127 PL_curpad = 0;
711 PL_localizing = 0; 1128 PL_localizing = 0;
712 PL_dirty = 0;
713 PL_restartop = 0; 1129 PL_restartop = 0;
1130#if PERL_VERSION_ATLEAST (5,10,0)
1131 PL_parser = 0;
1132#endif
1133 PL_hints = 0;
714 1134
715 /* recreate the die/warn hooks */ 1135 /* recreate the die/warn hooks */
716 PL_diehook = 0;
717 hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
718 PL_diehook = SvREFCNT_inc (rv_diehook); 1136 PL_diehook = SvREFCNT_inc (rv_diehook);
719
720 PL_warnhook = 0;
721 hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
722 PL_warnhook = SvREFCNT_inc (rv_warnhook); 1137 PL_warnhook = SvREFCNT_inc (rv_warnhook);
723 1138
724 GvSV (PL_defgv) = newSV (0); 1139 GvSV (PL_defgv) = newSV (0);
725 GvAV (PL_defgv) = coro->args; coro->args = 0; 1140 GvAV (PL_defgv) = coro->args; coro->args = 0;
726 GvSV (PL_errgv) = newSV (0); 1141 GvSV (PL_errgv) = newSV (0);
727 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1142 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1143 GvHV (PL_hintgv) = 0;
728 PL_rs = newSVsv (GvSV (irsgv)); 1144 PL_rs = newSVsv (GvSV (irsgv));
729 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1145 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
730 1146
731 { 1147 {
732 dSP; 1148 dSP;
733 LOGOP myop; 1149 UNOP myop;
734 1150
735 Zero (&myop, 1, LOGOP); 1151 Zero (&myop, 1, UNOP);
736 myop.op_next = Nullop; 1152 myop.op_next = Nullop;
1153 myop.op_type = OP_ENTERSUB;
737 myop.op_flags = OPf_WANT_VOID; 1154 myop.op_flags = OPf_WANT_VOID;
738 1155
739 PUSHMARK (SP); 1156 PUSHMARK (SP);
740 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1157 PUSHs ((SV *)coro->startcv);
741 PUTBACK; 1158 PUTBACK;
742 PL_op = (OP *)&myop; 1159 PL_op = (OP *)&myop;
743 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1160 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
744 SPAGAIN;
745 } 1161 }
746 1162
747 /* this newly created coroutine might be run on an existing cctx which most 1163 /* this newly created coroutine might be run on an existing cctx which most
748 * likely was suspended in set_stacklevel, called from entersub. 1164 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
749 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
750 * so we ENTER here for symmetry
751 */ 1165 */
752 ENTER; 1166 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
753} 1167 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1168 slf_frame.destroy = 0;
754 1169
1170 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1171 init_perl_op.op_next = PL_op;
1172 init_perl_op.op_type = OP_ENTERSUB;
1173 init_perl_op.op_ppaddr = pp_slf;
1174 /* no flags etc. required, as an init function won't be called */
1175
1176 PL_op = (OP *)&init_perl_op;
1177
1178 /* copy throw, in case it was set before init_perl */
1179 CORO_THROW = coro->except;
1180
1181 SWAP_SVS (coro);
1182
1183 if (ecb_expect_false (enable_times))
1184 {
1185 coro_times_update ();
1186 coro_times_sub (coro);
1187 }
1188}
1189
755static void 1190static void
756coro_destroy (pTHX_ struct coro *coro) 1191coro_unwind_stacks (pTHX)
757{ 1192{
758 if (!IN_DESTRUCT) 1193 if (!IN_DESTRUCT)
759 { 1194 {
760 /* restore all saved variables and stuff */ 1195 /* restore all saved variables and stuff */
761 LEAVE_SCOPE (0); 1196 LEAVE_SCOPE (0);
… …
769 POPSTACK_TO (PL_mainstack); 1204 POPSTACK_TO (PL_mainstack);
770 1205
771 /* unwind main stack */ 1206 /* unwind main stack */
772 dounwind (-1); 1207 dounwind (-1);
773 } 1208 }
1209}
774 1210
775 SvREFCNT_dec (GvSV (PL_defgv)); 1211static void
776 SvREFCNT_dec (GvAV (PL_defgv)); 1212destroy_perl (pTHX_ struct coro *coro)
777 SvREFCNT_dec (GvSV (PL_errgv)); 1213{
778 SvREFCNT_dec (PL_defoutgv); 1214 SV *svf [9];
779 SvREFCNT_dec (PL_rs);
780 SvREFCNT_dec (GvSV (irsgv));
781 1215
782 SvREFCNT_dec (PL_diehook);
783 SvREFCNT_dec (PL_warnhook);
784 1216 {
1217 SV *old_current = SvRV (coro_current);
1218 struct coro *current = SvSTATE (old_current);
1219
1220 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1221
1222 save_perl (aTHX_ current);
1223
1224 /* this will cause transfer_check to croak on block*/
1225 SvRV_set (coro_current, (SV *)coro->hv);
1226
1227 load_perl (aTHX_ coro);
1228
1229 coro_unwind_stacks (aTHX);
1230
1231 /* restore swapped sv's */
1232 SWAP_SVS (coro);
1233
1234 coro_destruct_stacks (aTHX);
1235
1236 /* now save some sv's to be free'd later */
1237 svf [0] = GvSV (PL_defgv);
1238 svf [1] = (SV *)GvAV (PL_defgv);
1239 svf [2] = GvSV (PL_errgv);
1240 svf [3] = (SV *)PL_defoutgv;
1241 svf [4] = PL_rs;
1242 svf [5] = GvSV (irsgv);
1243 svf [6] = (SV *)GvHV (PL_hintgv);
1244 svf [7] = PL_diehook;
1245 svf [8] = PL_warnhook;
1246 assert (9 == sizeof (svf) / sizeof (*svf));
1247
1248 SvRV_set (coro_current, old_current);
1249
1250 load_perl (aTHX_ current);
1251 }
1252
1253 {
1254 unsigned int i;
1255
1256 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1257 SvREFCNT_dec (svf [i]);
1258
785 SvREFCNT_dec (coro->saved_deffh); 1259 SvREFCNT_dec (coro->saved_deffh);
786 SvREFCNT_dec (coro->throw); 1260 SvREFCNT_dec (coro->rouse_cb);
787 1261 SvREFCNT_dec (coro->invoke_cb);
788 coro_destroy_stacks (aTHX); 1262 SvREFCNT_dec (coro->invoke_av);
1263 }
789} 1264}
790 1265
791static void 1266ecb_inline void
792free_coro_mortal (pTHX) 1267free_coro_mortal (pTHX)
793{ 1268{
794 if (expect_true (coro_mortal)) 1269 if (ecb_expect_true (coro_mortal))
795 { 1270 {
796 SvREFCNT_dec (coro_mortal); 1271 SvREFCNT_dec ((SV *)coro_mortal);
797 coro_mortal = 0; 1272 coro_mortal = 0;
798 } 1273 }
799} 1274}
800 1275
801static int 1276static int
802runops_trace (pTHX) 1277runops_trace (pTHX)
803{ 1278{
804 COP *oldcop = 0; 1279 COP *oldcop = 0;
805 int oldcxix = -2; 1280 int oldcxix = -2;
806 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
807 coro_cctx *cctx = coro->cctx;
808 1281
809 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1282 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
810 { 1283 {
811 PERL_ASYNC_CHECK (); 1284 PERL_ASYNC_CHECK ();
812 1285
813 if (cctx->flags & CC_TRACE_ALL) 1286 if (cctx_current->flags & CC_TRACE_ALL)
814 { 1287 {
815 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1288 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
816 { 1289 {
817 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
818 SV **bot, **top; 1291 SV **bot, **top;
819 AV *av = newAV (); /* return values */ 1292 AV *av = newAV (); /* return values */
820 SV **cb; 1293 SV **cb;
… …
830 : cx->blk_gimme == G_SCALAR ? bot + 1 1303 : cx->blk_gimme == G_SCALAR ? bot + 1
831 : bot; 1304 : bot;
832 1305
833 av_extend (av, top - bot); 1306 av_extend (av, top - bot);
834 while (bot < top) 1307 while (bot < top)
835 av_push (av, SvREFCNT_inc (*bot++)); 1308 av_push (av, SvREFCNT_inc_NN (*bot++));
836 1309
837 PL_runops = RUNOPS_DEFAULT; 1310 PL_runops = RUNOPS_DEFAULT;
838 ENTER; 1311 ENTER;
839 SAVETMPS; 1312 SAVETMPS;
840 EXTEND (SP, 3); 1313 EXTEND (SP, 3);
… …
857 1330
858 if (PL_curcop != &PL_compiling) 1331 if (PL_curcop != &PL_compiling)
859 { 1332 {
860 SV **cb; 1333 SV **cb;
861 1334
862 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1335 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
863 { 1336 {
864 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1337 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
865 1338
866 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1339 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
867 { 1340 {
868 runops_proc_t old_runops = PL_runops;
869 dSP; 1341 dSP;
870 GV *gv = CvGV (cx->blk_sub.cv); 1342 GV *gv = CvGV (cx->blk_sub.cv);
871 SV *fullname = sv_2mortal (newSV (0)); 1343 SV *fullname = sv_2mortal (newSV (0));
872 1344
873 if (isGV (gv)) 1345 if (isGV (gv))
… …
878 SAVETMPS; 1350 SAVETMPS;
879 EXTEND (SP, 3); 1351 EXTEND (SP, 3);
880 PUSHMARK (SP); 1352 PUSHMARK (SP);
881 PUSHs (&PL_sv_yes); 1353 PUSHs (&PL_sv_yes);
882 PUSHs (fullname); 1354 PUSHs (fullname);
883 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1355 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
884 PUTBACK; 1356 PUTBACK;
885 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1357 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
886 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1358 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
887 SPAGAIN; 1359 SPAGAIN;
888 FREETMPS; 1360 FREETMPS;
… …
891 } 1363 }
892 1364
893 oldcxix = cxstack_ix; 1365 oldcxix = cxstack_ix;
894 } 1366 }
895 1367
896 if (cctx->flags & CC_TRACE_LINE) 1368 if (cctx_current->flags & CC_TRACE_LINE)
897 { 1369 {
898 dSP; 1370 dSP;
899 1371
900 PL_runops = RUNOPS_DEFAULT; 1372 PL_runops = RUNOPS_DEFAULT;
901 ENTER; 1373 ENTER;
… …
920 1392
921 TAINT_NOT; 1393 TAINT_NOT;
922 return 0; 1394 return 0;
923} 1395}
924 1396
925/* inject a fake call to Coro::State::_cctx_init into the execution */ 1397static struct CoroSLF cctx_ssl_frame;
926/* _cctx_init should be careful, as it could be called at almost any time */
927/* during execution of a perl program */
928static void NOINLINE
929cctx_prepare (pTHX_ coro_cctx *cctx)
930{
931 dSP;
932 LOGOP myop;
933 1398
1399static void
1400slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1401{
1402 ta->prev = 0;
1403}
1404
1405static int
1406slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1407{
1408 *frame = cctx_ssl_frame;
1409
1410 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1411}
1412
1413/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1414static void ecb_noinline
1415cctx_prepare (pTHX)
1416{
934 PL_top_env = &PL_start_env; 1417 PL_top_env = &PL_start_env;
935 1418
936 if (cctx->flags & CC_TRACE) 1419 if (cctx_current->flags & CC_TRACE)
937 PL_runops = runops_trace; 1420 PL_runops = runops_trace;
938 1421
939 Zero (&myop, 1, LOGOP); 1422 /* we already must be executing an SLF op, there is no other valid way
940 myop.op_next = PL_op; 1423 * that can lead to creation of a new cctx */
941 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1424 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1425 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
942 1426
943 PUSHMARK (SP); 1427 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
944 EXTEND (SP, 2); 1428 cctx_ssl_frame = slf_frame;
945 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1429
946 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1430 slf_frame.prepare = slf_prepare_set_stacklevel;
947 PUTBACK; 1431 slf_frame.check = slf_check_set_stacklevel;
948 PL_op = (OP *)&myop; 1432}
949 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1433
950 SPAGAIN; 1434/* the tail of transfer: execute stuff we can only do after a transfer */
1435ecb_inline void
1436transfer_tail (pTHX)
1437{
1438 free_coro_mortal (aTHX);
1439}
1440
1441/* try to exit the same way perl's main function would do */
1442/* we do not bother resetting the environment or other things *7
1443/* that are not, uhm, essential */
1444/* this obviously also doesn't work when perl is embedded */
1445static void ecb_noinline ecb_cold
1446perlish_exit (pTHX)
1447{
1448 int exitstatus = perl_destruct (PL_curinterp);
1449 perl_free (PL_curinterp);
1450 exit (exitstatus);
951} 1451}
952 1452
953/* 1453/*
954 * this is a _very_ stripped down perl interpreter ;) 1454 * this is a _very_ stripped down perl interpreter ;)
955 */ 1455 */
956static void 1456static void
957cctx_run (void *arg) 1457cctx_run (void *arg)
958{ 1458{
1459#ifdef USE_ITHREADS
1460# if CORO_PTHREAD
1461 PERL_SET_CONTEXT (coro_thx);
1462# endif
1463#endif
1464 {
959 dTHX; 1465 dTHX;
960 1466
961 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1467 /* normally we would need to skip the entersub here */
962 UNLOCK; 1468 /* not doing so will re-execute it, which is exactly what we want */
963
964 /* we now skip the entersub that lead to transfer() */
965 PL_op = PL_op->op_next; 1469 /* PL_nop = PL_nop->op_next */
966 1470
967 /* inject a fake subroutine call to cctx_init */ 1471 /* inject a fake subroutine call to cctx_init */
968 cctx_prepare (aTHX_ (coro_cctx *)arg); 1472 cctx_prepare (aTHX);
969 1473
1474 /* cctx_run is the alternative tail of transfer() */
1475 transfer_tail (aTHX);
1476
970 /* somebody or something will hit me for both perl_run and PL_restartop */ 1477 /* somebody or something will hit me for both perl_run and PL_restartop */
971 PL_restartop = PL_op; 1478 PL_restartop = PL_op;
972 perl_run (PL_curinterp); 1479 perl_run (PL_curinterp);
973
974 /* 1480 /*
1481 * Unfortunately, there is no way to get at the return values of the
1482 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1483 * runtime errors here, as this is just a random interpreter, not a thread.
1484 */
1485
1486 /*
975 * If perl-run returns we assume exit() was being called or the coro 1487 * If perl-run returns we assume exit() was being called or the coro
976 * fell off the end, which seems to be the only valid (non-bug) 1488 * fell off the end, which seems to be the only valid (non-bug)
977 * reason for perl_run to return. We try to exit by jumping to the 1489 * reason for perl_run to return. We try to mimic whatever perl is normally
978 * bootstrap-time "top" top_env, as we cannot restore the "main" 1490 * doing in that case. YMMV.
979 * coroutine as Coro has no such concept
980 */ 1491 */
981 PL_top_env = main_top_env; 1492 perlish_exit (aTHX);
982 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1493 }
983} 1494}
984 1495
985static coro_cctx * 1496static coro_cctx *
986cctx_new () 1497cctx_new (void)
987{ 1498{
988 coro_cctx *cctx; 1499 coro_cctx *cctx;
989 void *stack_start;
990 size_t stack_size;
991 1500
992 ++cctx_count; 1501 ++cctx_count;
993
994 Newz (0, cctx, 1, coro_cctx); 1502 New (0, cctx, 1, coro_cctx);
995 1503
996#if HAVE_MMAP 1504 cctx->gen = cctx_gen;
997 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1505 cctx->flags = 0;
998 /* mmap supposedly does allocate-on-write for us */ 1506 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
999 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1000 1507
1001 if (cctx->sptr != (void *)-1) 1508 return cctx;
1002 { 1509}
1003# if CORO_STACKGUARD 1510
1004 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1511/* create a new cctx only suitable as source */
1005# endif 1512static coro_cctx *
1006 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1513cctx_new_empty (void)
1007 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1514{
1008 cctx->flags |= CC_MAPPED; 1515 coro_cctx *cctx = cctx_new ();
1516
1517 cctx->stack.sptr = 0;
1518 coro_create (&cctx->cctx, 0, 0, 0, 0);
1519
1520 return cctx;
1521}
1522
1523/* create a new cctx suitable as destination/running a perl interpreter */
1524static coro_cctx *
1525cctx_new_run (void)
1526{
1527 coro_cctx *cctx = cctx_new ();
1528
1529 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1009 } 1530 {
1010 else
1011#endif
1012 {
1013 cctx->ssize = coro_stacksize * (long)sizeof (long);
1014 New (0, cctx->sptr, coro_stacksize, long);
1015
1016 if (!cctx->sptr)
1017 {
1018 perror ("FATAL: unable to allocate stack for coroutine"); 1531 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1019 _exit (EXIT_FAILURE); 1532 _exit (EXIT_FAILURE);
1020 }
1021
1022 stack_start = cctx->sptr;
1023 stack_size = cctx->ssize;
1024 } 1533 }
1025 1534
1026 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1027 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1028 1536
1029 return cctx; 1537 return cctx;
1030} 1538}
1031 1539
1032static void 1540static void
1033cctx_destroy (coro_cctx *cctx) 1541cctx_destroy (coro_cctx *cctx)
1034{ 1542{
1035 if (!cctx) 1543 if (!cctx)
1036 return; 1544 return;
1037 1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
1038 --cctx_count; 1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
1039 1550
1040#if CORO_USE_VALGRIND 1551 coro_stack_free (&cctx->stack);
1041 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1042#endif
1043
1044#if HAVE_MMAP
1045 if (cctx->flags & CC_MAPPED)
1046 munmap (cctx->sptr, cctx->ssize);
1047 else
1048#endif
1049 Safefree (cctx->sptr);
1050 1552
1051 Safefree (cctx); 1553 Safefree (cctx);
1052} 1554}
1053 1555
1054/* wether this cctx should be destructed */ 1556/* wether this cctx should be destructed */
1055#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1557#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1056 1558
1057static coro_cctx * 1559static coro_cctx *
1058cctx_get (pTHX) 1560cctx_get (pTHX)
1059{ 1561{
1060 while (expect_true (cctx_first)) 1562 while (ecb_expect_true (cctx_first))
1061 { 1563 {
1062 coro_cctx *cctx = cctx_first; 1564 coro_cctx *cctx = cctx_first;
1063 cctx_first = cctx->next; 1565 cctx_first = cctx->next;
1064 --cctx_idle; 1566 --cctx_idle;
1065 1567
1066 if (expect_true (!CCTX_EXPIRED (cctx))) 1568 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1067 return cctx; 1569 return cctx;
1068 1570
1069 cctx_destroy (cctx); 1571 cctx_destroy (cctx);
1070 } 1572 }
1071 1573
1072 return cctx_new (); 1574 return cctx_new_run ();
1073} 1575}
1074 1576
1075static void 1577static void
1076cctx_put (coro_cctx *cctx) 1578cctx_put (coro_cctx *cctx)
1077{ 1579{
1580 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1581
1078 /* free another cctx if overlimit */ 1582 /* free another cctx if overlimit */
1079 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1583 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1080 { 1584 {
1081 coro_cctx *first = cctx_first; 1585 coro_cctx *first = cctx_first;
1082 cctx_first = first->next; 1586 cctx_first = first->next;
1083 --cctx_idle; 1587 --cctx_idle;
1084 1588
… …
1093/** coroutine switching *****************************************************/ 1597/** coroutine switching *****************************************************/
1094 1598
1095static void 1599static void
1096transfer_check (pTHX_ struct coro *prev, struct coro *next) 1600transfer_check (pTHX_ struct coro *prev, struct coro *next)
1097{ 1601{
1602 /* TODO: throwing up here is considered harmful */
1603
1098 if (expect_true (prev != next)) 1604 if (ecb_expect_true (prev != next))
1099 { 1605 {
1100 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1606 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1101 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1607 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1102 1608
1103 if (expect_false (next->flags & CF_RUNNING)) 1609 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1104 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1105
1106 if (expect_false (next->flags & CF_DESTROYED))
1107 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1610 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1108 1611
1109 if (
1110#if PERL_VERSION_ATLEAST (5,9,0) 1612#if !PERL_VERSION_ATLEAST (5,10,0)
1111 expect_false (PL_parser)
1112#else
1113 expect_false (PL_lex_state != LEX_NOTPARSING) 1613 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1114#endif
1115 )
1116 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1614 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1615#endif
1117 } 1616 }
1118} 1617}
1119 1618
1120/* always use the TRANSFER macro */ 1619/* always use the TRANSFER macro */
1121static void NOINLINE 1620static void ecb_noinline /* noinline so we have a fixed stackframe */
1122transfer (pTHX_ struct coro *prev, struct coro *next) 1621transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1123{ 1622{
1124 dSTACKLEVEL; 1623 dSTACKLEVEL;
1125 static volatile int has_throw;
1126 1624
1127 /* sometimes transfer is only called to set idle_sp */ 1625 /* sometimes transfer is only called to set idle_sp */
1128 if (expect_false (!next)) 1626 if (ecb_expect_false (!prev))
1129 { 1627 {
1130 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1628 cctx_current->idle_sp = STACKLEVEL;
1131 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1629 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1132 } 1630 }
1133 else if (expect_true (prev != next)) 1631 else if (ecb_expect_true (prev != next))
1134 { 1632 {
1135 coro_cctx *prev__cctx; 1633 coro_cctx *cctx_prev;
1136 1634
1137 if (expect_false (prev->flags & CF_NEW)) 1635 if (ecb_expect_false (prev->flags & CF_NEW))
1138 { 1636 {
1139 /* create a new empty context */ 1637 /* create a new empty/source context */
1140 Newz (0, prev->cctx, 1, coro_cctx);
1141 prev->flags &= ~CF_NEW; 1638 prev->flags &= ~CF_NEW;
1142 prev->flags |= CF_RUNNING; 1639 prev->flags |= CF_RUNNING;
1143 } 1640 }
1144 1641
1145 prev->flags &= ~CF_RUNNING; 1642 prev->flags &= ~CF_RUNNING;
1146 next->flags |= CF_RUNNING; 1643 next->flags |= CF_RUNNING;
1147 1644
1148 LOCK;
1149
1150 /* first get rid of the old state */ 1645 /* first get rid of the old state */
1151 save_perl (aTHX_ prev); 1646 save_perl (aTHX_ prev);
1152 1647
1153 if (expect_false (next->flags & CF_NEW)) 1648 if (ecb_expect_false (next->flags & CF_NEW))
1154 { 1649 {
1155 /* need to start coroutine */ 1650 /* need to start coroutine */
1156 next->flags &= ~CF_NEW; 1651 next->flags &= ~CF_NEW;
1157 /* setup coroutine call */ 1652 /* setup coroutine call */
1158 coro_setup (aTHX_ next); 1653 init_perl (aTHX_ next);
1159 } 1654 }
1160 else 1655 else
1161 load_perl (aTHX_ next); 1656 load_perl (aTHX_ next);
1162 1657
1163 prev__cctx = prev->cctx;
1164
1165 /* possibly "free" the cctx */ 1658 /* possibly untie and reuse the cctx */
1166 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1659 if (ecb_expect_true (
1660 cctx_current->idle_sp == STACKLEVEL
1661 && !(cctx_current->flags & CC_TRACE)
1662 && !force_cctx
1663 ))
1167 { 1664 {
1168 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1665 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1169 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1666 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1170 1667
1171 prev->cctx = 0;
1172
1173 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1668 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1174 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1669 /* without this the next cctx_get might destroy the running cctx while still in use */
1175 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1670 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1176 if (!next->cctx) 1671 if (ecb_expect_true (!next->cctx))
1177 next->cctx = cctx_get (aTHX); 1672 next->cctx = cctx_get (aTHX);
1178 1673
1179 cctx_put (prev__cctx); 1674 cctx_put (cctx_current);
1180 } 1675 }
1676 else
1677 prev->cctx = cctx_current;
1181 1678
1182 ++next->usecount; 1679 ++next->usecount;
1183 1680
1184 if (expect_true (!next->cctx)) 1681 cctx_prev = cctx_current;
1185 next->cctx = cctx_get (aTHX); 1682 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1186 1683
1187 has_throw = !!next->throw; 1684 next->cctx = 0;
1188 1685
1189 if (expect_false (prev__cctx != next->cctx)) 1686 if (ecb_expect_false (cctx_prev != cctx_current))
1190 { 1687 {
1191 prev__cctx->top_env = PL_top_env; 1688 cctx_prev->top_env = PL_top_env;
1192 PL_top_env = next->cctx->top_env; 1689 PL_top_env = cctx_current->top_env;
1193 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1690 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1194 } 1691 }
1195 1692
1196 free_coro_mortal (aTHX); 1693 transfer_tail (aTHX);
1197 UNLOCK;
1198
1199 if (expect_false (has_throw))
1200 {
1201 struct coro *coro = SvSTATE (coro_current);
1202
1203 if (coro->throw)
1204 {
1205 SV *exception = coro->throw;
1206 coro->throw = 0;
1207 sv_setsv (ERRSV, exception);
1208 croak (0);
1209 }
1210 }
1211 } 1694 }
1212} 1695}
1213 1696
1214struct transfer_args
1215{
1216 struct coro *prev, *next;
1217};
1218
1219#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1697#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1220#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1698#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1221 1699
1222/** high level stuff ********************************************************/ 1700/** high level stuff ********************************************************/
1223 1701
1702/* this function is actually Coro, not Coro::State, but we call it from here */
1703/* because it is convenient - but it hasn't been declared yet for that reason */
1224static int 1704static void
1705coro_call_on_destroy (pTHX_ struct coro *coro);
1706
1707static void
1225coro_state_destroy (pTHX_ struct coro *coro) 1708coro_state_destroy (pTHX_ struct coro *coro)
1226{ 1709{
1227 if (coro->flags & CF_DESTROYED) 1710 if (coro->flags & CF_ZOMBIE)
1228 return 0; 1711 return;
1229 1712
1713 slf_destroy (aTHX_ coro);
1714
1230 coro->flags |= CF_DESTROYED; 1715 coro->flags |= CF_ZOMBIE;
1231 1716
1232 if (coro->flags & CF_READY) 1717 if (coro->flags & CF_READY)
1233 { 1718 {
1234 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1719 /* reduce nready, as destroying a ready coro effectively unreadies it */
1235 /* alternative: look through all ready queues and remove the coro */ 1720 /* alternative: look through all ready queues and remove the coro */
1236 LOCK;
1237 --coro_nready; 1721 --coro_nready;
1238 UNLOCK;
1239 } 1722 }
1240 else 1723 else
1241 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1724 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1242
1243 if (coro->mainstack && coro->mainstack != main_mainstack)
1244 {
1245 struct coro temp;
1246
1247 if (coro->flags & CF_RUNNING)
1248 croak ("FATAL: tried to destroy currently running coroutine");
1249
1250 save_perl (aTHX_ &temp);
1251 load_perl (aTHX_ coro);
1252
1253 coro_destroy (aTHX_ coro);
1254
1255 load_perl (aTHX_ &temp);
1256
1257 coro->slot = 0;
1258 }
1259
1260 cctx_destroy (coro->cctx);
1261 SvREFCNT_dec (coro->args);
1262 1725
1263 if (coro->next) coro->next->prev = coro->prev; 1726 if (coro->next) coro->next->prev = coro->prev;
1264 if (coro->prev) coro->prev->next = coro->next; 1727 if (coro->prev) coro->prev->next = coro->next;
1265 if (coro == coro_first) coro_first = coro->next; 1728 if (coro == coro_first) coro_first = coro->next;
1266 1729
1267 return 1; 1730 if (coro->mainstack
1731 && coro->mainstack != main_mainstack
1732 && coro->slot
1733 && !PL_dirty)
1734 destroy_perl (aTHX_ coro);
1735
1736 cctx_destroy (coro->cctx);
1737 SvREFCNT_dec (coro->startcv);
1738 SvREFCNT_dec (coro->args);
1739 SvREFCNT_dec (coro->swap_sv);
1740 SvREFCNT_dec (CORO_THROW);
1741
1742 coro_call_on_destroy (aTHX_ coro);
1743
1744 /* more destruction mayhem in coro_state_free */
1268} 1745}
1269 1746
1270static int 1747static int
1271coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1748coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1272{ 1749{
1273 struct coro *coro = (struct coro *)mg->mg_ptr; 1750 struct coro *coro = (struct coro *)mg->mg_ptr;
1274 mg->mg_ptr = 0; 1751 mg->mg_ptr = 0;
1275 1752
1276 coro->hv = 0;
1277
1278 if (--coro->refcnt < 0)
1279 {
1280 coro_state_destroy (aTHX_ coro); 1753 coro_state_destroy (aTHX_ coro);
1754 SvREFCNT_dec (coro->on_destroy);
1755 SvREFCNT_dec (coro->status);
1756
1281 Safefree (coro); 1757 Safefree (coro);
1282 }
1283 1758
1284 return 0; 1759 return 0;
1285} 1760}
1286 1761
1287static int 1762static int ecb_cold
1288coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1763coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1289{ 1764{
1290 struct coro *coro = (struct coro *)mg->mg_ptr; 1765 /* called when perl clones the current process the slow way (windows process emulation) */
1291 1766 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1292 ++coro->refcnt; 1767 mg->mg_ptr = 0;
1768 mg->mg_virtual = 0;
1293 1769
1294 return 0; 1770 return 0;
1295} 1771}
1296 1772
1297static MGVTBL coro_state_vtbl = { 1773static MGVTBL coro_state_vtbl = {
… …
1304# define MGf_DUP 0 1780# define MGf_DUP 0
1305#endif 1781#endif
1306}; 1782};
1307 1783
1308static void 1784static void
1309prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1785prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1310{ 1786{
1311 ta->prev = SvSTATE (prev_sv); 1787 ta->prev = SvSTATE (prev_sv);
1312 ta->next = SvSTATE (next_sv); 1788 ta->next = SvSTATE (next_sv);
1313 TRANSFER_CHECK (*ta); 1789 TRANSFER_CHECK (*ta);
1314} 1790}
1315 1791
1316static void 1792static void
1317api_transfer (SV *prev_sv, SV *next_sv) 1793api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1794{
1795 struct coro_transfer_args ta;
1796
1797 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1798 TRANSFER (ta, 1);
1799}
1800
1801/** Coro ********************************************************************/
1802
1803ecb_inline void
1804coro_enq (pTHX_ struct coro *coro)
1805{
1806 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1807
1808 SvREFCNT_inc_NN (coro->hv);
1809
1810 coro->next_ready = 0;
1811 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1812 ready [1] = coro;
1813}
1814
1815ecb_inline struct coro *
1816coro_deq (pTHX)
1817{
1818 int prio;
1819
1820 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1821 {
1822 struct coro **ready = coro_ready [prio];
1823
1824 if (ready [0])
1825 {
1826 struct coro *coro = ready [0];
1827 ready [0] = coro->next_ready;
1828 return coro;
1829 }
1830 }
1831
1832 return 0;
1833}
1834
1835static void
1836invoke_sv_ready_hook_helper (void)
1318{ 1837{
1319 dTHX; 1838 dTHX;
1320 struct transfer_args ta; 1839 dSP;
1321 1840
1322 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1841 ENTER;
1323 TRANSFER (ta); 1842 SAVETMPS;
1324}
1325 1843
1326/** Coro ********************************************************************/ 1844 PUSHMARK (SP);
1845 PUTBACK;
1846 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1327 1847
1328static void 1848 FREETMPS;
1329coro_enq (pTHX_ SV *coro_sv) 1849 LEAVE;
1330{
1331 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1332}
1333
1334static SV *
1335coro_deq (pTHX_ int min_prio)
1336{
1337 int prio = PRIO_MAX - PRIO_MIN;
1338
1339 min_prio -= PRIO_MIN;
1340 if (min_prio < 0)
1341 min_prio = 0;
1342
1343 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1344 if (AvFILLp (coro_ready [prio]) >= 0)
1345 return av_shift (coro_ready [prio]);
1346
1347 return 0;
1348} 1850}
1349 1851
1350static int 1852static int
1351api_ready (SV *coro_sv) 1853api_ready (pTHX_ SV *coro_sv)
1352{ 1854{
1353 dTHX;
1354 struct coro *coro;
1355
1356 if (SvROK (coro_sv))
1357 coro_sv = SvRV (coro_sv);
1358
1359 coro = SvSTATE (coro_sv); 1855 struct coro *coro = SvSTATE (coro_sv);
1360 1856
1361 if (coro->flags & CF_READY) 1857 if (coro->flags & CF_READY)
1362 return 0; 1858 return 0;
1363 1859
1364 coro->flags |= CF_READY; 1860 coro->flags |= CF_READY;
1365 1861
1366 LOCK; 1862 coro_enq (aTHX_ coro);
1367 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1863
1368 ++coro_nready; 1864 if (!coro_nready++)
1369 UNLOCK; 1865 if (coroapi.readyhook)
1866 coroapi.readyhook ();
1370 1867
1371 return 1; 1868 return 1;
1372} 1869}
1373 1870
1374static int 1871static int
1375api_is_ready (SV *coro_sv) 1872api_is_ready (pTHX_ SV *coro_sv)
1376{ 1873{
1377 dTHX;
1378 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1874 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1379} 1875}
1380 1876
1381static void 1877/* expects to own a reference to next->hv */
1878ecb_inline void
1382prepare_schedule (pTHX_ struct transfer_args *ta) 1879prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1383{ 1880{
1384 SV *prev_sv, *next_sv;
1385
1386 for (;;)
1387 {
1388 LOCK;
1389 next_sv = coro_deq (aTHX_ PRIO_MIN);
1390
1391 /* nothing to schedule: call the idle handler */
1392 if (expect_false (!next_sv))
1393 {
1394 dSP;
1395 UNLOCK;
1396
1397 ENTER;
1398 SAVETMPS;
1399
1400 PUSHMARK (SP);
1401 PUTBACK;
1402 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1403
1404 FREETMPS;
1405 LEAVE;
1406 continue;
1407 }
1408
1409 ta->next = SvSTATE (next_sv);
1410
1411 /* cannot transfer to destroyed coros, skip and look for next */
1412 if (expect_false (ta->next->flags & CF_DESTROYED))
1413 {
1414 UNLOCK;
1415 SvREFCNT_dec (next_sv);
1416 /* coro_nready is already taken care of by destroy */
1417 continue;
1418 }
1419
1420 --coro_nready;
1421 UNLOCK;
1422 break;
1423 }
1424
1425 /* free this only after the transfer */
1426 prev_sv = SvRV (coro_current); 1881 SV *prev_sv = SvRV (coro_current);
1882
1427 ta->prev = SvSTATE (prev_sv); 1883 ta->prev = SvSTATE_hv (prev_sv);
1884 ta->next = next;
1885
1428 TRANSFER_CHECK (*ta); 1886 TRANSFER_CHECK (*ta);
1429 assert (ta->next->flags & CF_READY); 1887
1430 ta->next->flags &= ~CF_READY;
1431 SvRV_set (coro_current, next_sv); 1888 SvRV_set (coro_current, (SV *)next->hv);
1432 1889
1433 LOCK;
1434 free_coro_mortal (aTHX); 1890 free_coro_mortal (aTHX);
1435 coro_mortal = prev_sv; 1891 coro_mortal = prev_sv;
1436 UNLOCK;
1437} 1892}
1438 1893
1439static void 1894static void
1895prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1896{
1897 for (;;)
1898 {
1899 struct coro *next = coro_deq (aTHX);
1900
1901 if (ecb_expect_true (next))
1902 {
1903 /* cannot transfer to destroyed coros, skip and look for next */
1904 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1905 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1906 else
1907 {
1908 next->flags &= ~CF_READY;
1909 --coro_nready;
1910
1911 prepare_schedule_to (aTHX_ ta, next);
1912 break;
1913 }
1914 }
1915 else
1916 {
1917 /* nothing to schedule: call the idle handler */
1918 if (SvROK (sv_idle)
1919 && SvOBJECT (SvRV (sv_idle)))
1920 {
1921 if (SvRV (sv_idle) == SvRV (coro_current))
1922 {
1923 require_pv ("Carp");
1924
1925 {
1926 dSP;
1927
1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1933 PUTBACK;
1934 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1935
1936 FREETMPS;
1937 LEAVE;
1938 }
1939 }
1940
1941 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1942 api_ready (aTHX_ SvRV (sv_idle));
1943 --coro_nready;
1944 }
1945 else
1946 {
1947 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1948 dSP;
1949
1950 ENTER;
1951 SAVETMPS;
1952
1953 PUSHMARK (SP);
1954 PUTBACK;
1955 call_sv (sv_idle, G_VOID | G_DISCARD);
1956
1957 FREETMPS;
1958 LEAVE;
1959 }
1960 }
1961 }
1962}
1963
1964ecb_inline void
1440prepare_cede (pTHX_ struct transfer_args *ta) 1965prepare_cede (pTHX_ struct coro_transfer_args *ta)
1441{ 1966{
1442 api_ready (coro_current); 1967 api_ready (aTHX_ coro_current);
1443 prepare_schedule (aTHX_ ta); 1968 prepare_schedule (aTHX_ ta);
1444} 1969}
1445 1970
1971ecb_inline void
1972prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV *prev = SvRV (coro_current);
1975
1976 if (coro_nready)
1977 {
1978 prepare_schedule (aTHX_ ta);
1979 api_ready (aTHX_ prev);
1980 }
1981 else
1982 prepare_nop (aTHX_ ta);
1983}
1984
1985static void
1986api_schedule (pTHX)
1987{
1988 struct coro_transfer_args ta;
1989
1990 prepare_schedule (aTHX_ &ta);
1991 TRANSFER (ta, 1);
1992}
1993
1994static void
1995api_schedule_to (pTHX_ SV *coro_sv)
1996{
1997 struct coro_transfer_args ta;
1998 struct coro *next = SvSTATE (coro_sv);
1999
2000 SvREFCNT_inc_NN (coro_sv);
2001 prepare_schedule_to (aTHX_ &ta, next);
2002}
2003
1446static int 2004static int
1447prepare_cede_notself (pTHX_ struct transfer_args *ta) 2005api_cede (pTHX)
1448{ 2006{
1449 if (coro_nready) 2007 struct coro_transfer_args ta;
1450 { 2008
1451 SV *prev = SvRV (coro_current);
1452 prepare_schedule (aTHX_ ta); 2009 prepare_cede (aTHX_ &ta);
1453 api_ready (prev); 2010
2011 if (ecb_expect_true (ta.prev != ta.next))
2012 {
2013 TRANSFER (ta, 1);
1454 return 1; 2014 return 1;
1455 } 2015 }
1456 else 2016 else
1457 return 0; 2017 return 0;
1458} 2018}
1459 2019
1460static void
1461api_schedule (void)
1462{
1463 dTHX;
1464 struct transfer_args ta;
1465
1466 prepare_schedule (aTHX_ &ta);
1467 TRANSFER (ta);
1468}
1469
1470static int 2020static int
1471api_cede (void) 2021api_cede_notself (pTHX)
1472{ 2022{
1473 dTHX; 2023 if (coro_nready)
2024 {
1474 struct transfer_args ta; 2025 struct coro_transfer_args ta;
1475 2026
1476 prepare_cede (aTHX_ &ta); 2027 prepare_cede_notself (aTHX_ &ta);
1477
1478 if (expect_true (ta.prev != ta.next))
1479 {
1480 TRANSFER (ta); 2028 TRANSFER (ta, 1);
1481 return 1; 2029 return 1;
1482 } 2030 }
1483 else 2031 else
1484 return 0; 2032 return 0;
1485} 2033}
1486 2034
1487static int 2035static void
1488api_cede_notself (void)
1489{
1490 dTHX;
1491 struct transfer_args ta;
1492
1493 if (prepare_cede_notself (aTHX_ &ta))
1494 {
1495 TRANSFER (ta);
1496 return 1;
1497 }
1498 else
1499 return 0;
1500}
1501
1502static void
1503api_trace (SV *coro_sv, int flags) 2036api_trace (pTHX_ SV *coro_sv, int flags)
1504{ 2037{
1505 dTHX;
1506 struct coro *coro = SvSTATE (coro_sv); 2038 struct coro *coro = SvSTATE (coro_sv);
1507 2039
2040 if (coro->flags & CF_RUNNING)
2041 croak ("cannot enable tracing on a running coroutine, caught");
2042
1508 if (flags & CC_TRACE) 2043 if (flags & CC_TRACE)
1509 { 2044 {
1510 if (!coro->cctx) 2045 if (!coro->cctx)
1511 coro->cctx = cctx_new (); 2046 coro->cctx = cctx_new_run ();
1512 else if (!(coro->cctx->flags & CC_TRACE)) 2047 else if (!(coro->cctx->flags & CC_TRACE))
1513 croak ("cannot enable tracing on coroutine with custom stack"); 2048 croak ("cannot enable tracing on coroutine with custom stack, caught");
1514 2049
1515 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2050 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1516 } 2051 }
1517 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2052 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1518 { 2053 {
… …
1523 else 2058 else
1524 coro->slot->runops = RUNOPS_DEFAULT; 2059 coro->slot->runops = RUNOPS_DEFAULT;
1525 } 2060 }
1526} 2061}
1527 2062
2063static void
2064coro_push_av (pTHX_ AV *av, I32 gimme_v)
2065{
2066 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2067 {
2068 dSP;
2069
2070 if (gimme_v == G_SCALAR)
2071 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2072 else
2073 {
2074 int i;
2075 EXTEND (SP, AvFILLp (av) + 1);
2076
2077 for (i = 0; i <= AvFILLp (av); ++i)
2078 PUSHs (AvARRAY (av)[i]);
2079 }
2080
2081 PUTBACK;
2082 }
2083}
2084
2085static void
2086coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2087{
2088 if (!coro->on_destroy)
2089 coro->on_destroy = newAV ();
2090
2091 av_push (coro->on_destroy, cb);
2092}
2093
2094static void
2095slf_destroy_join (pTHX_ struct CoroSLF *frame)
2096{
2097 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2098}
2099
2100static int
2101slf_check_join (pTHX_ struct CoroSLF *frame)
2102{
2103 struct coro *coro = (struct coro *)frame->data;
2104
2105 if (!coro->status)
2106 return 1;
2107
2108 frame->destroy = 0;
2109
2110 coro_push_av (aTHX_ coro->status, GIMME_V);
2111
2112 SvREFCNT_dec ((SV *)coro->hv);
2113
2114 return 0;
2115}
2116
2117static void
2118slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2121
2122 if (items > 1)
2123 croak ("join called with too many arguments");
2124
2125 if (coro->status)
2126 frame->prepare = prepare_nop;
2127 else
2128 {
2129 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2130 frame->prepare = prepare_schedule;
2131 }
2132
2133 frame->check = slf_check_join;
2134 frame->destroy = slf_destroy_join;
2135 frame->data = (void *)coro;
2136 SvREFCNT_inc (coro->hv);
2137}
2138
2139static void
2140coro_call_on_destroy (pTHX_ struct coro *coro)
2141{
2142 AV *od = coro->on_destroy;
2143
2144 if (!od)
2145 return;
2146
2147 coro->on_destroy = 0;
2148 sv_2mortal ((SV *)od);
2149
2150 while (AvFILLp (od) >= 0)
2151 {
2152 SV *cb = sv_2mortal (av_pop (od));
2153
2154 /* coro hv's (and only hv's at the moment) are supported as well */
2155 if (SvSTATEhv_p (aTHX_ cb))
2156 api_ready (aTHX_ cb);
2157 else
2158 {
2159 dSP; /* don't disturb outer sp */
2160 PUSHMARK (SP);
2161
2162 if (coro->status)
2163 {
2164 PUTBACK;
2165 coro_push_av (aTHX_ coro->status, G_ARRAY);
2166 SPAGAIN;
2167 }
2168
2169 PUTBACK;
2170 call_sv (cb, G_VOID | G_DISCARD);
2171 }
2172 }
2173}
2174
2175static void
2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2177{
2178 AV *av;
2179
2180 if (coro->status)
2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
2187
2188 /* items are actually not so common, so optimise for this case */
2189 if (items)
2190 {
2191 int i;
2192
2193 av_extend (av, items - 1);
2194
2195 for (i = 0; i < items; ++i)
2196 av_push (av, SvREFCNT_inc_NN (arg [i]));
2197 }
2198}
2199
2200static void
2201slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2202{
2203 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2204 api_ready (aTHX_ sv_manager);
2205
2206 frame->prepare = prepare_schedule;
2207 frame->check = slf_check_repeat;
2208
2209 /* as a minor optimisation, we could unwind all stacks here */
2210 /* but that puts extra pressure on pp_slf, and is not worth much */
2211 /*coro_unwind_stacks (aTHX);*/
2212}
2213
2214static void
2215slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 HV *coro_hv = (HV *)SvRV (coro_current);
2218
2219 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221}
2222
2223static void
2224slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2225{
2226 HV *coro_hv;
2227 struct coro *coro;
2228
2229 if (items <= 0)
2230 croak ("Coro::cancel called without coro object,");
2231
2232 coro = SvSTATE (arg [0]);
2233 coro_hv = coro->hv;
2234
2235 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2236
2237 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2238 {
2239 /* coro currently busy cancelling something, so just notify it */
2240 coro->slf_frame.data = (void *)coro;
2241
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 else if (coro_hv == (HV *)SvRV (coro_current))
2246 {
2247 /* cancelling the current coro is allowed, and equals terminate */
2248 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2249 }
2250 else
2251 {
2252 struct coro *self = SvSTATE_current;
2253
2254 if (!self)
2255 croak ("Coro::cancel called outside of thread content,");
2256
2257 /* otherwise we cancel directly, purely for speed reasons
2258 * unfortunately, this requires some magic trickery, as
2259 * somebody else could cancel us, so we have to fight the cancellation.
2260 * this is ugly, and hopefully fully worth the extra speed.
2261 * besides, I can't get the slow-but-safe version working...
2262 */
2263 slf_frame.data = 0;
2264 self->flags |= CF_NOCANCEL;
2265 coro_state_destroy (aTHX_ coro);
2266 self->flags &= ~CF_NOCANCEL;
2267
2268 if (slf_frame.data)
2269 {
2270 /* while we were busy we have been cancelled, so terminate */
2271 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2272 }
2273 else
2274 {
2275 frame->prepare = prepare_nop;
2276 frame->check = slf_check_nop;
2277 }
2278 }
2279}
2280
2281static int
2282slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2283{
2284 frame->prepare = 0;
2285 coro_unwind_stacks (aTHX);
2286
2287 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2288
2289 return 1;
2290}
2291
2292static int
2293safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2294{
2295 if (coro->cctx)
2296 croak ("coro inside C callback, unable to cancel at this time, caught");
2297
2298 if (coro->flags & CF_NEW)
2299 {
2300 coro_set_status (aTHX_ coro, arg, items);
2301 coro_state_destroy (aTHX_ coro);
2302 }
2303 else
2304 {
2305 if (!coro->slf_frame.prepare)
2306 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2307
2308 slf_destroy (aTHX_ coro);
2309
2310 coro_set_status (aTHX_ coro, arg, items);
2311 coro->slf_frame.prepare = prepare_nop;
2312 coro->slf_frame.check = slf_check_safe_cancel;
2313
2314 api_ready (aTHX_ (SV *)coro->hv);
2315 }
2316
2317 return 1;
2318}
2319
2320/*****************************************************************************/
2321/* async pool handler */
2322
2323static int
2324slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = (struct coro *)frame->data;
2328
2329 if (!coro->invoke_cb)
2330 return 1; /* loop till we have invoke */
2331 else
2332 {
2333 hv_store (hv, "desc", sizeof ("desc") - 1,
2334 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2335
2336 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2337
2338 {
2339 dSP;
2340 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2341 PUTBACK;
2342 }
2343
2344 SvREFCNT_dec (GvAV (PL_defgv));
2345 GvAV (PL_defgv) = coro->invoke_av;
2346 coro->invoke_av = 0;
2347
2348 return 0;
2349 }
2350}
2351
2352static void
2353slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2354{
2355 HV *hv = (HV *)SvRV (coro_current);
2356 struct coro *coro = SvSTATE_hv ((SV *)hv);
2357
2358 if (ecb_expect_true (coro->saved_deffh))
2359 {
2360 /* subsequent iteration */
2361 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2362 coro->saved_deffh = 0;
2363
2364 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2365 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2366 {
2367 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2368 return;
2369 }
2370 else
2371 {
2372 av_clear (GvAV (PL_defgv));
2373 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2374
2375 coro->prio = 0;
2376
2377 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378 api_trace (aTHX_ coro_current, 0);
2379
2380 frame->prepare = prepare_schedule;
2381 av_push (av_async_pool, SvREFCNT_inc (hv));
2382 }
2383 }
2384 else
2385 {
2386 /* first iteration, simply fall through */
2387 frame->prepare = prepare_nop;
2388 }
2389
2390 frame->check = slf_check_pool_handler;
2391 frame->data = (void *)coro;
2392}
2393
2394/*****************************************************************************/
2395/* rouse callback */
2396
2397#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2398
2399static void
2400coro_rouse_callback (pTHX_ CV *cv)
2401{
2402 dXSARGS;
2403 SV *data = (SV *)S_GENSUB_ARG;
2404
2405 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2406 {
2407 /* first call, set args */
2408 SV *coro = SvRV (data);
2409 AV *av = newAV ();
2410
2411 SvRV_set (data, (SV *)av);
2412
2413 /* better take a full copy of the arguments */
2414 while (items--)
2415 av_store (av, items, newSVsv (ST (items)));
2416
2417 api_ready (aTHX_ coro);
2418 SvREFCNT_dec (coro);
2419 }
2420
2421 XSRETURN_EMPTY;
2422}
2423
2424static int
2425slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2426{
2427 SV *data = (SV *)frame->data;
2428
2429 if (CORO_THROW)
2430 return 0;
2431
2432 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2433 return 1;
2434
2435 /* now push all results on the stack */
2436 {
2437 dSP;
2438 AV *av = (AV *)SvRV (data);
2439 int i;
2440
2441 EXTEND (SP, AvFILLp (av) + 1);
2442 for (i = 0; i <= AvFILLp (av); ++i)
2443 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2444
2445 /* we have stolen the elements, so set length to zero and free */
2446 AvFILLp (av) = -1;
2447 av_undef (av);
2448
2449 PUTBACK;
2450 }
2451
2452 return 0;
2453}
2454
2455static void
2456slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2457{
2458 SV *cb;
2459
2460 if (items)
2461 cb = arg [0];
2462 else
2463 {
2464 struct coro *coro = SvSTATE_current;
2465
2466 if (!coro->rouse_cb)
2467 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2468
2469 cb = sv_2mortal (coro->rouse_cb);
2470 coro->rouse_cb = 0;
2471 }
2472
2473 if (!SvROK (cb)
2474 || SvTYPE (SvRV (cb)) != SVt_PVCV
2475 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2476 croak ("Coro::rouse_wait called with illegal callback argument,");
2477
2478 {
2479 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2480 SV *data = (SV *)S_GENSUB_ARG;
2481
2482 frame->data = (void *)data;
2483 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2484 frame->check = slf_check_rouse_wait;
2485 }
2486}
2487
2488static SV *
2489coro_new_rouse_cb (pTHX)
2490{
2491 HV *hv = (HV *)SvRV (coro_current);
2492 struct coro *coro = SvSTATE_hv (hv);
2493 SV *data = newRV_inc ((SV *)hv);
2494 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2495
2496 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2497 SvREFCNT_dec (data); /* magicext increases the refcount */
2498
2499 SvREFCNT_dec (coro->rouse_cb);
2500 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2501
2502 return cb;
2503}
2504
2505/*****************************************************************************/
2506/* schedule-like-function opcode (SLF) */
2507
2508static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2509static const CV *slf_cv;
2510static SV **slf_argv;
2511static int slf_argc, slf_arga; /* count, allocated */
2512static I32 slf_ax; /* top of stack, for restore */
2513
2514/* this restores the stack in the case we patched the entersub, to */
2515/* recreate the stack frame as perl will on following calls */
2516/* since entersub cleared the stack */
2517static OP *
2518pp_restore (pTHX)
2519{
2520 int i;
2521 SV **SP = PL_stack_base + slf_ax;
2522
2523 PUSHMARK (SP);
2524
2525 EXTEND (SP, slf_argc + 1);
2526
2527 for (i = 0; i < slf_argc; ++i)
2528 PUSHs (sv_2mortal (slf_argv [i]));
2529
2530 PUSHs ((SV *)CvGV (slf_cv));
2531
2532 RETURNOP (slf_restore.op_first);
2533}
2534
2535static void
2536slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2537{
2538 SV **arg = (SV **)slf_frame.data;
2539
2540 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2541}
2542
2543static void
2544slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2545{
2546 if (items != 2)
2547 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2548
2549 frame->prepare = slf_prepare_transfer;
2550 frame->check = slf_check_nop;
2551 frame->data = (void *)arg; /* let's hope it will stay valid */
2552}
2553
2554static void
2555slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2556{
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_nop;
2559}
2560
2561static void
2562slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2563{
2564 struct coro *next = (struct coro *)slf_frame.data;
2565
2566 SvREFCNT_inc_NN (next->hv);
2567 prepare_schedule_to (aTHX_ ta, next);
2568}
2569
2570static void
2571slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 if (!items)
2574 croak ("Coro::schedule_to expects a coroutine argument, caught");
2575
2576 frame->data = (void *)SvSTATE (arg [0]);
2577 frame->prepare = slf_prepare_schedule_to;
2578 frame->check = slf_check_nop;
2579}
2580
2581static void
2582slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 api_ready (aTHX_ SvRV (coro_current));
2585
2586 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2587}
2588
2589static void
2590slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 frame->prepare = prepare_cede;
2593 frame->check = slf_check_nop;
2594}
2595
2596static void
2597slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2598{
2599 frame->prepare = prepare_cede_notself;
2600 frame->check = slf_check_nop;
2601}
2602
2603/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2604static void
2605slf_destroy (pTHX_ struct coro *coro)
2606{
2607 struct CoroSLF frame = coro->slf_frame;
2608
2609 /*
2610 * The on_destroy below most likely is from an SLF call.
2611 * Since by definition the SLF call will not finish when we destroy
2612 * the coro, we will have to force-finish it here, otherwise
2613 * cleanup functions cannot call SLF functions.
2614 */
2615 coro->slf_frame.prepare = 0;
2616
2617 /* this callback is reserved for slf functions needing to do cleanup */
2618 if (frame.destroy && frame.prepare && !PL_dirty)
2619 frame.destroy (aTHX_ &frame);
2620}
2621
2622/*
2623 * these not obviously related functions are all rolled into one
2624 * function to increase chances that they all will call transfer with the same
2625 * stack offset
2626 * SLF stands for "schedule-like-function".
2627 */
2628static OP *
2629pp_slf (pTHX)
2630{
2631 I32 checkmark; /* mark SP to see how many elements check has pushed */
2632
2633 /* set up the slf frame, unless it has already been set-up */
2634 /* the latter happens when a new coro has been started */
2635 /* or when a new cctx was attached to an existing coroutine */
2636 if (ecb_expect_true (!slf_frame.prepare))
2637 {
2638 /* first iteration */
2639 dSP;
2640 SV **arg = PL_stack_base + TOPMARK + 1;
2641 int items = SP - arg; /* args without function object */
2642 SV *gv = *sp;
2643
2644 /* do a quick consistency check on the "function" object, and if it isn't */
2645 /* for us, divert to the real entersub */
2646 if (SvTYPE (gv) != SVt_PVGV
2647 || !GvCV (gv)
2648 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2649 return PL_ppaddr[OP_ENTERSUB](aTHX);
2650
2651 if (!(PL_op->op_flags & OPf_STACKED))
2652 {
2653 /* ampersand-form of call, use @_ instead of stack */
2654 AV *av = GvAV (PL_defgv);
2655 arg = AvARRAY (av);
2656 items = AvFILLp (av) + 1;
2657 }
2658
2659 /* now call the init function, which needs to set up slf_frame */
2660 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2661 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2662
2663 /* pop args */
2664 SP = PL_stack_base + POPMARK;
2665
2666 PUTBACK;
2667 }
2668
2669 /* now that we have a slf_frame, interpret it! */
2670 /* we use a callback system not to make the code needlessly */
2671 /* complicated, but so we can run multiple perl coros from one cctx */
2672
2673 do
2674 {
2675 struct coro_transfer_args ta;
2676
2677 slf_frame.prepare (aTHX_ &ta);
2678 TRANSFER (ta, 0);
2679
2680 checkmark = PL_stack_sp - PL_stack_base;
2681 }
2682 while (slf_frame.check (aTHX_ &slf_frame));
2683
2684 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2685
2686 /* exception handling */
2687 if (ecb_expect_false (CORO_THROW))
2688 {
2689 SV *exception = sv_2mortal (CORO_THROW);
2690
2691 CORO_THROW = 0;
2692 sv_setsv (ERRSV, exception);
2693 croak (0);
2694 }
2695
2696 /* return value handling - mostly like entersub */
2697 /* make sure we put something on the stack in scalar context */
2698 if (GIMME_V == G_SCALAR
2699 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2700 {
2701 dSP;
2702 SV **bot = PL_stack_base + checkmark;
2703
2704 if (sp == bot) /* too few, push undef */
2705 bot [1] = &PL_sv_undef;
2706 else /* too many, take last one */
2707 bot [1] = *sp;
2708
2709 SP = bot + 1;
2710
2711 PUTBACK;
2712 }
2713
2714 return NORMAL;
2715}
2716
2717static void
2718api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2719{
2720 int i;
2721 SV **arg = PL_stack_base + ax;
2722 int items = PL_stack_sp - arg + 1;
2723
2724 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2725
2726 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2727 && PL_op->op_ppaddr != pp_slf)
2728 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2729
2730 CvFLAGS (cv) |= CVf_SLF;
2731 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2732 slf_cv = cv;
2733
2734 /* we patch the op, and then re-run the whole call */
2735 /* we have to put the same argument on the stack for this to work */
2736 /* and this will be done by pp_restore */
2737 slf_restore.op_next = (OP *)&slf_restore;
2738 slf_restore.op_type = OP_CUSTOM;
2739 slf_restore.op_ppaddr = pp_restore;
2740 slf_restore.op_first = PL_op;
2741
2742 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2743
2744 if (PL_op->op_flags & OPf_STACKED)
2745 {
2746 if (items > slf_arga)
2747 {
2748 slf_arga = items;
2749 Safefree (slf_argv);
2750 New (0, slf_argv, slf_arga, SV *);
2751 }
2752
2753 slf_argc = items;
2754
2755 for (i = 0; i < items; ++i)
2756 slf_argv [i] = SvREFCNT_inc (arg [i]);
2757 }
2758 else
2759 slf_argc = 0;
2760
2761 PL_op->op_ppaddr = pp_slf;
2762 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2763
2764 PL_op = (OP *)&slf_restore;
2765}
2766
2767/*****************************************************************************/
2768/* dynamic wind */
2769
2770static void
2771on_enterleave_call (pTHX_ SV *cb)
2772{
2773 dSP;
2774
2775 PUSHSTACK;
2776
2777 PUSHMARK (SP);
2778 PUTBACK;
2779 call_sv (cb, G_VOID | G_DISCARD);
2780 SPAGAIN;
2781
2782 POPSTACK;
2783}
2784
2785static SV *
2786coro_avp_pop_and_free (pTHX_ AV **avp)
2787{
2788 AV *av = *avp;
2789 SV *res = av_pop (av);
2790
2791 if (AvFILLp (av) < 0)
2792 {
2793 *avp = 0;
2794 SvREFCNT_dec (av);
2795 }
2796
2797 return res;
2798}
2799
2800static void
2801coro_pop_on_enter (pTHX_ void *coro)
2802{
2803 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2804 SvREFCNT_dec (cb);
2805}
2806
2807static void
2808coro_pop_on_leave (pTHX_ void *coro)
2809{
2810 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2811 on_enterleave_call (aTHX_ sv_2mortal (cb));
2812}
2813
2814/*****************************************************************************/
2815/* PerlIO::cede */
2816
2817typedef struct
2818{
2819 PerlIOBuf base;
2820 NV next, every;
2821} PerlIOCede;
2822
2823static IV ecb_cold
2824PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2825{
2826 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2827
2828 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2829 self->next = nvtime () + self->every;
2830
2831 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2832}
2833
2834static SV * ecb_cold
2835PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2836{
2837 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2838
2839 return newSVnv (self->every);
2840}
2841
2842static IV
2843PerlIOCede_flush (pTHX_ PerlIO *f)
2844{
2845 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2846 double now = nvtime ();
2847
2848 if (now >= self->next)
2849 {
2850 api_cede (aTHX);
2851 self->next = now + self->every;
2852 }
2853
2854 return PerlIOBuf_flush (aTHX_ f);
2855}
2856
2857static PerlIO_funcs PerlIO_cede =
2858{
2859 sizeof(PerlIO_funcs),
2860 "cede",
2861 sizeof(PerlIOCede),
2862 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2863 PerlIOCede_pushed,
2864 PerlIOBuf_popped,
2865 PerlIOBuf_open,
2866 PerlIOBase_binmode,
2867 PerlIOCede_getarg,
2868 PerlIOBase_fileno,
2869 PerlIOBuf_dup,
2870 PerlIOBuf_read,
2871 PerlIOBuf_unread,
2872 PerlIOBuf_write,
2873 PerlIOBuf_seek,
2874 PerlIOBuf_tell,
2875 PerlIOBuf_close,
2876 PerlIOCede_flush,
2877 PerlIOBuf_fill,
2878 PerlIOBase_eof,
2879 PerlIOBase_error,
2880 PerlIOBase_clearerr,
2881 PerlIOBase_setlinebuf,
2882 PerlIOBuf_get_base,
2883 PerlIOBuf_bufsiz,
2884 PerlIOBuf_get_ptr,
2885 PerlIOBuf_get_cnt,
2886 PerlIOBuf_set_ptrcnt,
2887};
2888
2889/*****************************************************************************/
2890/* Coro::Semaphore & Coro::Signal */
2891
2892static SV *
2893coro_waitarray_new (pTHX_ int count)
2894{
2895 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2896 AV *av = newAV ();
2897 SV **ary;
2898
2899 /* unfortunately, building manually saves memory */
2900 Newx (ary, 2, SV *);
2901 AvALLOC (av) = ary;
2902#if PERL_VERSION_ATLEAST (5,10,0)
2903 AvARRAY (av) = ary;
2904#else
2905 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2906 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2907 SvPVX ((SV *)av) = (char *)ary;
2908#endif
2909 AvMAX (av) = 1;
2910 AvFILLp (av) = 0;
2911 ary [0] = newSViv (count);
2912
2913 return newRV_noinc ((SV *)av);
2914}
2915
2916/* semaphore */
2917
2918static void
2919coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2920{
2921 SV *count_sv = AvARRAY (av)[0];
2922 IV count = SvIVX (count_sv);
2923
2924 count += adjust;
2925 SvIVX (count_sv) = count;
2926
2927 /* now wake up as many waiters as are expected to lock */
2928 while (count > 0 && AvFILLp (av) > 0)
2929 {
2930 SV *cb;
2931
2932 /* swap first two elements so we can shift a waiter */
2933 AvARRAY (av)[0] = AvARRAY (av)[1];
2934 AvARRAY (av)[1] = count_sv;
2935 cb = av_shift (av);
2936
2937 if (SvOBJECT (cb))
2938 {
2939 api_ready (aTHX_ cb);
2940 --count;
2941 }
2942 else if (SvTYPE (cb) == SVt_PVCV)
2943 {
2944 dSP;
2945 PUSHMARK (SP);
2946 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2947 PUTBACK;
2948 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2949 }
2950
2951 SvREFCNT_dec (cb);
2952 }
2953}
2954
2955static void
2956coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2957{
2958 /* call $sem->adjust (0) to possibly wake up some other waiters */
2959 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2960}
2961
2962static int
2963slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2964{
2965 AV *av = (AV *)frame->data;
2966 SV *count_sv = AvARRAY (av)[0];
2967 SV *coro_hv = SvRV (coro_current);
2968
2969 frame->destroy = 0;
2970
2971 /* if we are about to throw, don't actually acquire the lock, just throw */
2972 if (ecb_expect_false (CORO_THROW))
2973 {
2974 /* we still might be responsible for the semaphore, so wake up others */
2975 coro_semaphore_adjust (aTHX_ av, 0);
2976
2977 return 0;
2978 }
2979 else if (SvIVX (count_sv) > 0)
2980 {
2981 if (acquire)
2982 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2983 else
2984 coro_semaphore_adjust (aTHX_ av, 0);
2985
2986 return 0;
2987 }
2988 else
2989 {
2990 int i;
2991 /* if we were woken up but can't down, we look through the whole */
2992 /* waiters list and only add us if we aren't in there already */
2993 /* this avoids some degenerate memory usage cases */
2994 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2995 if (AvARRAY (av)[i] == coro_hv)
2996 return 1;
2997
2998 av_push (av, SvREFCNT_inc (coro_hv));
2999 return 1;
3000 }
3001}
3002
3003static int
3004slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3005{
3006 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3007}
3008
3009static int
3010slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3011{
3012 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3013}
3014
3015static void
3016slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3017{
3018 AV *av = (AV *)SvRV (arg [0]);
3019
3020 if (SvIVX (AvARRAY (av)[0]) > 0)
3021 {
3022 frame->data = (void *)av;
3023 frame->prepare = prepare_nop;
3024 }
3025 else
3026 {
3027 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3028
3029 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3030 frame->prepare = prepare_schedule;
3031 /* to avoid race conditions when a woken-up coro gets terminated */
3032 /* we arrange for a temporary on_destroy that calls adjust (0) */
3033 frame->destroy = coro_semaphore_destroy;
3034 }
3035}
3036
3037static void
3038slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3039{
3040 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3041 frame->check = slf_check_semaphore_down;
3042}
3043
3044static void
3045slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3046{
3047 if (items >= 2)
3048 {
3049 /* callback form */
3050 AV *av = (AV *)SvRV (arg [0]);
3051 SV *cb_cv = s_get_cv_croak (arg [1]);
3052
3053 av_push (av, SvREFCNT_inc_NN (cb_cv));
3054
3055 if (SvIVX (AvARRAY (av)[0]) > 0)
3056 coro_semaphore_adjust (aTHX_ av, 0);
3057
3058 frame->prepare = prepare_nop;
3059 frame->check = slf_check_nop;
3060 }
3061 else
3062 {
3063 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3064 frame->check = slf_check_semaphore_wait;
3065 }
3066}
3067
3068/* signal */
3069
3070static void
3071coro_signal_wake (pTHX_ AV *av, int count)
3072{
3073 SvIVX (AvARRAY (av)[0]) = 0;
3074
3075 /* now signal count waiters */
3076 while (count > 0 && AvFILLp (av) > 0)
3077 {
3078 SV *cb;
3079
3080 /* swap first two elements so we can shift a waiter */
3081 cb = AvARRAY (av)[0];
3082 AvARRAY (av)[0] = AvARRAY (av)[1];
3083 AvARRAY (av)[1] = cb;
3084
3085 cb = av_shift (av);
3086
3087 if (SvTYPE (cb) == SVt_PVCV)
3088 {
3089 dSP;
3090 PUSHMARK (SP);
3091 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3092 PUTBACK;
3093 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3094 }
3095 else
3096 {
3097 api_ready (aTHX_ cb);
3098 sv_setiv (cb, 0); /* signal waiter */
3099 }
3100
3101 SvREFCNT_dec (cb);
3102
3103 --count;
3104 }
3105}
3106
3107static int
3108slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3109{
3110 /* if we are about to throw, also stop waiting */
3111 return SvROK ((SV *)frame->data) && !CORO_THROW;
3112}
3113
3114static void
3115slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3116{
3117 AV *av = (AV *)SvRV (arg [0]);
3118
3119 if (items >= 2)
3120 {
3121 SV *cb_cv = s_get_cv_croak (arg [1]);
3122 av_push (av, SvREFCNT_inc_NN (cb_cv));
3123
3124 if (SvIVX (AvARRAY (av)[0]))
3125 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3126
3127 frame->prepare = prepare_nop;
3128 frame->check = slf_check_nop;
3129 }
3130 else if (SvIVX (AvARRAY (av)[0]))
3131 {
3132 SvIVX (AvARRAY (av)[0]) = 0;
3133 frame->prepare = prepare_nop;
3134 frame->check = slf_check_nop;
3135 }
3136 else
3137 {
3138 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3139
3140 av_push (av, waiter);
3141
3142 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3143 frame->prepare = prepare_schedule;
3144 frame->check = slf_check_signal_wait;
3145 }
3146}
3147
3148/*****************************************************************************/
3149/* Coro::AIO */
3150
3151#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3152
3153/* helper storage struct */
3154struct io_state
3155{
3156 int errorno;
3157 I32 laststype; /* U16 in 5.10.0 */
3158 int laststatval;
3159 Stat_t statcache;
3160};
3161
3162static void
3163coro_aio_callback (pTHX_ CV *cv)
3164{
3165 dXSARGS;
3166 AV *state = (AV *)S_GENSUB_ARG;
3167 SV *coro = av_pop (state);
3168 SV *data_sv = newSV (sizeof (struct io_state));
3169
3170 av_extend (state, items - 1);
3171
3172 sv_upgrade (data_sv, SVt_PV);
3173 SvCUR_set (data_sv, sizeof (struct io_state));
3174 SvPOK_only (data_sv);
3175
3176 {
3177 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3178
3179 data->errorno = errno;
3180 data->laststype = PL_laststype;
3181 data->laststatval = PL_laststatval;
3182 data->statcache = PL_statcache;
3183 }
3184
3185 /* now build the result vector out of all the parameters and the data_sv */
3186 {
3187 int i;
3188
3189 for (i = 0; i < items; ++i)
3190 av_push (state, SvREFCNT_inc_NN (ST (i)));
3191 }
3192
3193 av_push (state, data_sv);
3194
3195 api_ready (aTHX_ coro);
3196 SvREFCNT_dec (coro);
3197 SvREFCNT_dec ((AV *)state);
3198}
3199
3200static int
3201slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3202{
3203 AV *state = (AV *)frame->data;
3204
3205 /* if we are about to throw, return early */
3206 /* this does not cancel the aio request, but at least */
3207 /* it quickly returns */
3208 if (CORO_THROW)
3209 return 0;
3210
3211 /* one element that is an RV? repeat! */
3212 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3213 return 1;
3214
3215 /* restore status */
3216 {
3217 SV *data_sv = av_pop (state);
3218 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3219
3220 errno = data->errorno;
3221 PL_laststype = data->laststype;
3222 PL_laststatval = data->laststatval;
3223 PL_statcache = data->statcache;
3224
3225 SvREFCNT_dec (data_sv);
3226 }
3227
3228 /* push result values */
3229 {
3230 dSP;
3231 int i;
3232
3233 EXTEND (SP, AvFILLp (state) + 1);
3234 for (i = 0; i <= AvFILLp (state); ++i)
3235 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3236
3237 PUTBACK;
3238 }
3239
3240 return 0;
3241}
3242
3243static void
3244slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3245{
3246 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3247 SV *coro_hv = SvRV (coro_current);
3248 struct coro *coro = SvSTATE_hv (coro_hv);
3249
3250 /* put our coroutine id on the state arg */
3251 av_push (state, SvREFCNT_inc_NN (coro_hv));
3252
3253 /* first see whether we have a non-zero priority and set it as AIO prio */
3254 if (coro->prio)
3255 {
3256 dSP;
3257
3258 static SV *prio_cv;
3259 static SV *prio_sv;
3260
3261 if (ecb_expect_false (!prio_cv))
3262 {
3263 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3264 prio_sv = newSViv (0);
3265 }
3266
3267 PUSHMARK (SP);
3268 sv_setiv (prio_sv, coro->prio);
3269 XPUSHs (prio_sv);
3270
3271 PUTBACK;
3272 call_sv (prio_cv, G_VOID | G_DISCARD);
3273 }
3274
3275 /* now call the original request */
3276 {
3277 dSP;
3278 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3279 int i;
3280
3281 PUSHMARK (SP);
3282
3283 /* first push all args to the stack */
3284 EXTEND (SP, items + 1);
3285
3286 for (i = 0; i < items; ++i)
3287 PUSHs (arg [i]);
3288
3289 /* now push the callback closure */
3290 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3291
3292 /* now call the AIO function - we assume our request is uncancelable */
3293 PUTBACK;
3294 call_sv ((SV *)req, G_VOID | G_DISCARD);
3295 }
3296
3297 /* now that the request is going, we loop till we have a result */
3298 frame->data = (void *)state;
3299 frame->prepare = prepare_schedule;
3300 frame->check = slf_check_aio_req;
3301}
3302
3303static void
3304coro_aio_req_xs (pTHX_ CV *cv)
3305{
3306 dXSARGS;
3307
3308 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3309
3310 XSRETURN_EMPTY;
3311}
3312
3313/*****************************************************************************/
3314
3315#if CORO_CLONE
3316# include "clone.c"
3317#endif
3318
3319/*****************************************************************************/
3320
3321static SV *
3322coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3323{
3324 SV *coro_sv;
3325 struct coro *coro;
3326 MAGIC *mg;
3327 HV *hv;
3328 SV *cb;
3329 int i;
3330
3331 if (argc > 0)
3332 {
3333 cb = s_get_cv_croak (argv [0]);
3334
3335 if (!is_coro)
3336 {
3337 if (CvISXSUB (cb))
3338 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3339
3340 if (!CvROOT (cb))
3341 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3342 }
3343 }
3344
3345 Newz (0, coro, 1, struct coro);
3346 coro->args = newAV ();
3347 coro->flags = CF_NEW;
3348
3349 if (coro_first) coro_first->prev = coro;
3350 coro->next = coro_first;
3351 coro_first = coro;
3352
3353 coro->hv = hv = newHV ();
3354 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3355 mg->mg_flags |= MGf_DUP;
3356 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3357
3358 if (argc > 0)
3359 {
3360 av_extend (coro->args, argc + is_coro - 1);
3361
3362 if (is_coro)
3363 {
3364 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3365 cb = (SV *)cv_coro_run;
3366 }
3367
3368 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3369
3370 for (i = 1; i < argc; i++)
3371 av_push (coro->args, newSVsv (argv [i]));
3372 }
3373
3374 return coro_sv;
3375}
3376
3377#ifndef __cplusplus
3378ecb_cold XS(boot_Coro__State);
3379#endif
3380
3381#if CORO_JIT
3382
3383static void ecb_noinline ecb_cold
3384pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3385{
3386 dSP;
3387 AV *av = newAV ();
3388
3389 av_store (av, 3, newSVuv (d));
3390 av_store (av, 2, newSVuv (c));
3391 av_store (av, 1, newSVuv (b));
3392 av_store (av, 0, newSVuv (a));
3393
3394 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3395
3396 PUTBACK;
3397}
3398
3399static void ecb_noinline ecb_cold
3400jit_init (pTHX)
3401{
3402 dSP;
3403 SV *load, *save;
3404 char *map_base;
3405 char *load_ptr, *save_ptr;
3406 STRLEN load_len, save_len, map_len;
3407 int count;
3408
3409 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3410
3411 PUSHMARK (SP);
3412 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3413 #include "state.h"
3414 count = call_pv ("Coro::State::_jit", G_ARRAY);
3415 SPAGAIN;
3416
3417 save = POPs; save_ptr = SvPVbyte (save, save_len);
3418 load = POPs; load_ptr = SvPVbyte (load, load_len);
3419
3420 map_len = load_len + save_len + 16;
3421
3422 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3423
3424 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3425
3426 load_perl_slots = (load_save_perl_slots_type)map_base;
3427 memcpy (map_base, load_ptr, load_len);
3428
3429 map_base += (load_len + 15) & ~15;
3430
3431 save_perl_slots = (load_save_perl_slots_type)map_base;
3432 memcpy (map_base, save_ptr, save_len);
3433
3434 /* we are good citizens and try to make the page read-only, so the evil evil */
3435 /* hackers might have it a bit more difficult */
3436 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3437
3438 PUTBACK;
3439 eval_pv ("undef &Coro::State::_jit", 1);
3440}
3441
3442#endif
3443
1528MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3444MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1529 3445
1530PROTOTYPES: DISABLE 3446PROTOTYPES: DISABLE
1531 3447
1532BOOT: 3448BOOT:
1533{ 3449{
1534#ifdef USE_ITHREADS 3450#ifdef USE_ITHREADS
1535 MUTEX_INIT (&coro_mutex); 3451# if CORO_PTHREAD
3452 coro_thx = PERL_GET_CONTEXT;
1536#endif 3453# endif
1537 BOOT_PAGESIZE; 3454#endif
3455 /* perl defines these to check for existance first, but why it doesn't */
3456 /* just create them one at init time is not clear to me, except for */
3457 /* programs trying to delete them, but... */
3458 /* anyway, we declare this as invalid and make sure they are initialised here */
3459 DEFSV;
3460 ERRSV;
3461
3462 cctx_current = cctx_new_empty ();
1538 3463
1539 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3464 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1540 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3465 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1541#if 0 3466
1542 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 3467 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1543 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3468 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1544#endif 3469 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3470
1545 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 3471 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1546 rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3472 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1547 rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3473 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1548 3474
1549 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3475 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1550 3476
1551 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3477 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1552 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3478 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1557 main_top_env = PL_top_env; 3483 main_top_env = PL_top_env;
1558 3484
1559 while (main_top_env->je_prev) 3485 while (main_top_env->je_prev)
1560 main_top_env = main_top_env->je_prev; 3486 main_top_env = main_top_env->je_prev;
1561 3487
3488 {
3489 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3490
3491 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3492 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3493
3494 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3495 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3496 }
3497
1562 coroapi.ver = CORO_API_VERSION; 3498 coroapi.ver = CORO_API_VERSION;
1563 coroapi.rev = CORO_API_REVISION; 3499 coroapi.rev = CORO_API_REVISION;
3500
1564 coroapi.transfer = api_transfer; 3501 coroapi.transfer = api_transfer;
1565 3502
3503 coroapi.sv_state = SvSTATE_;
3504 coroapi.execute_slf = api_execute_slf;
3505 coroapi.prepare_nop = prepare_nop;
3506 coroapi.prepare_schedule = prepare_schedule;
3507 coroapi.prepare_cede = prepare_cede;
3508 coroapi.prepare_cede_notself = prepare_cede_notself;
3509
3510 time_init (aTHX);
3511
1566 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3512 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3513#if CORO_JIT
3514 PUTBACK;
3515 jit_init (aTHX);
3516 SPAGAIN;
3517#endif
1567} 3518}
1568 3519
1569SV * 3520SV *
1570new (char *klass, ...) 3521new (SV *klass, ...)
3522 ALIAS:
3523 Coro::new = 1
1571 CODE: 3524 CODE:
1572{ 3525 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1573 struct coro *coro;
1574 MAGIC *mg;
1575 HV *hv;
1576 int i;
1577
1578 Newz (0, coro, 1, struct coro);
1579 coro->args = newAV ();
1580 coro->flags = CF_NEW;
1581
1582 if (coro_first) coro_first->prev = coro;
1583 coro->next = coro_first;
1584 coro_first = coro;
1585
1586 coro->hv = hv = newHV ();
1587 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1588 mg->mg_flags |= MGf_DUP;
1589 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1590
1591 av_extend (coro->args, items - 1);
1592 for (i = 1; i < items; i++)
1593 av_push (coro->args, newSVsv (ST (i)));
1594}
1595 OUTPUT:
1596 RETVAL
1597
1598# these not obviously related functions are all rolled into the same xs
1599# function to increase chances that they all will call transfer with the same
1600# stack offset
1601void
1602_set_stacklevel (...)
1603 ALIAS:
1604 Coro::State::transfer = 1
1605 Coro::schedule = 2
1606 Coro::cede = 3
1607 Coro::cede_notself = 4
1608 CODE:
1609{
1610 struct transfer_args ta;
1611
1612 switch (ix)
1613 {
1614 case 0:
1615 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1616 ta.next = 0;
1617 break;
1618
1619 case 1:
1620 if (items != 2)
1621 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1622
1623 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1624 break;
1625
1626 case 2:
1627 prepare_schedule (aTHX_ &ta);
1628 break;
1629
1630 case 3:
1631 prepare_cede (aTHX_ &ta);
1632 break;
1633
1634 case 4:
1635 if (!prepare_cede_notself (aTHX_ &ta))
1636 XSRETURN_EMPTY;
1637
1638 break;
1639 }
1640
1641 BARRIER;
1642 PUTBACK;
1643 TRANSFER (ta);
1644 SPAGAIN; /* might be the sp of a different coroutine now */
1645 /* be extra careful not to ever do anything after TRANSFER */
1646}
1647
1648bool
1649_destroy (SV *coro_sv)
1650 CODE:
1651 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1652 OUTPUT: 3526 OUTPUT:
1653 RETVAL 3527 RETVAL
1654 3528
1655void 3529void
1656_exit (code) 3530transfer (...)
1657 int code
1658 PROTOTYPE: $ 3531 PROTOTYPE: $$
1659 CODE: 3532 CODE:
1660 _exit (code); 3533 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3534
3535SV *
3536clone (Coro::State coro)
3537 CODE:
3538{
3539#if CORO_CLONE
3540 struct coro *ncoro = coro_clone (aTHX_ coro);
3541 MAGIC *mg;
3542 /* TODO: too much duplication */
3543 ncoro->hv = newHV ();
3544 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3545 mg->mg_flags |= MGf_DUP;
3546 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3547#else
3548 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3549#endif
3550}
3551 OUTPUT:
3552 RETVAL
1661 3553
1662int 3554int
1663cctx_stacksize (int new_stacksize = 0) 3555cctx_stacksize (int new_stacksize = 0)
3556 PROTOTYPE: ;$
1664 CODE: 3557 CODE:
1665 RETVAL = coro_stacksize; 3558 RETVAL = cctx_stacksize;
1666 if (new_stacksize) 3559 if (new_stacksize)
3560 {
1667 coro_stacksize = new_stacksize; 3561 cctx_stacksize = new_stacksize;
3562 ++cctx_gen;
3563 }
1668 OUTPUT: 3564 OUTPUT:
1669 RETVAL 3565 RETVAL
1670 3566
1671int 3567int
3568cctx_max_idle (int max_idle = 0)
3569 PROTOTYPE: ;$
3570 CODE:
3571 RETVAL = cctx_max_idle;
3572 if (max_idle > 1)
3573 cctx_max_idle = max_idle;
3574 OUTPUT:
3575 RETVAL
3576
3577int
1672cctx_count () 3578cctx_count ()
3579 PROTOTYPE:
1673 CODE: 3580 CODE:
1674 RETVAL = cctx_count; 3581 RETVAL = cctx_count;
1675 OUTPUT: 3582 OUTPUT:
1676 RETVAL 3583 RETVAL
1677 3584
1678int 3585int
1679cctx_idle () 3586cctx_idle ()
3587 PROTOTYPE:
1680 CODE: 3588 CODE:
1681 RETVAL = cctx_idle; 3589 RETVAL = cctx_idle;
1682 OUTPUT: 3590 OUTPUT:
1683 RETVAL 3591 RETVAL
1684 3592
1685void 3593void
1686list () 3594list ()
3595 PROTOTYPE:
1687 PPCODE: 3596 PPCODE:
1688{ 3597{
1689 struct coro *coro; 3598 struct coro *coro;
1690 for (coro = coro_first; coro; coro = coro->next) 3599 for (coro = coro_first; coro; coro = coro->next)
1691 if (coro->hv) 3600 if (coro->hv)
1692 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3601 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1693} 3602}
1694 3603
… …
1696call (Coro::State coro, SV *coderef) 3605call (Coro::State coro, SV *coderef)
1697 ALIAS: 3606 ALIAS:
1698 eval = 1 3607 eval = 1
1699 CODE: 3608 CODE:
1700{ 3609{
1701 if (coro->mainstack) 3610 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1702 { 3611 {
1703 struct coro temp; 3612 struct coro *current = SvSTATE_current;
3613 struct CoroSLF slf_save;
1704 3614
1705 if (!(coro->flags & CF_RUNNING)) 3615 if (current != coro)
1706 { 3616 {
3617 PUTBACK;
1707 save_perl (aTHX_ &temp); 3618 save_perl (aTHX_ current);
1708 load_perl (aTHX_ coro); 3619 load_perl (aTHX_ coro);
3620 /* the coro is most likely in an active SLF call.
3621 * while not strictly required (the code we execute is
3622 * not allowed to call any SLF functions), it's cleaner
3623 * to reinitialise the slf_frame and restore it later.
3624 * This might one day allow us to actually do SLF calls
3625 * from code executed here.
3626 */
3627 slf_save = slf_frame;
3628 slf_frame.prepare = 0;
3629 SPAGAIN;
1709 } 3630 }
1710 3631
1711 {
1712 dSP;
1713 ENTER;
1714 SAVETMPS;
1715 PUTBACK;
1716 PUSHSTACK; 3632 PUSHSTACK;
3633
1717 PUSHMARK (SP); 3634 PUSHMARK (SP);
3635 PUTBACK;
1718 3636
1719 if (ix) 3637 if (ix)
1720 eval_sv (coderef, 0); 3638 eval_sv (coderef, 0);
1721 else 3639 else
1722 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3640 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1723 3641
1724 POPSTACK; 3642 POPSTACK;
1725 SPAGAIN; 3643 SPAGAIN;
1726 FREETMPS;
1727 LEAVE;
1728 PUTBACK;
1729 }
1730 3644
1731 if (!(coro->flags & CF_RUNNING)) 3645 if (current != coro)
1732 { 3646 {
3647 PUTBACK;
3648 slf_frame = slf_save;
1733 save_perl (aTHX_ coro); 3649 save_perl (aTHX_ coro);
1734 load_perl (aTHX_ &temp); 3650 load_perl (aTHX_ current);
3651 SPAGAIN;
1735 } 3652 }
1736 } 3653 }
1737} 3654}
1738 3655
1739SV * 3656SV *
… …
1741 PROTOTYPE: $ 3658 PROTOTYPE: $
1742 ALIAS: 3659 ALIAS:
1743 is_ready = CF_READY 3660 is_ready = CF_READY
1744 is_running = CF_RUNNING 3661 is_running = CF_RUNNING
1745 is_new = CF_NEW 3662 is_new = CF_NEW
1746 is_destroyed = CF_DESTROYED 3663 is_destroyed = CF_ZOMBIE
3664 is_zombie = CF_ZOMBIE
3665 is_suspended = CF_SUSPENDED
1747 CODE: 3666 CODE:
1748 RETVAL = boolSV (coro->flags & ix); 3667 RETVAL = boolSV (coro->flags & ix);
1749 OUTPUT: 3668 OUTPUT:
1750 RETVAL 3669 RETVAL
1751 3670
1752void 3671void
3672throw (SV *self, SV *exception = &PL_sv_undef)
3673 PROTOTYPE: $;$
3674 CODE:
3675{
3676 struct coro *coro = SvSTATE (self);
3677 struct coro *current = SvSTATE_current;
3678 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3679 SvREFCNT_dec (*exceptionp);
3680 SvGETMAGIC (exception);
3681 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3682
3683 api_ready (aTHX_ self);
3684}
3685
3686void
1753api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3687api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3688 PROTOTYPE: $;$
3689 C_ARGS: aTHX_ coro, flags
1754 3690
1755SV * 3691SV *
1756has_stack (Coro::State coro) 3692has_cctx (Coro::State coro)
1757 PROTOTYPE: $ 3693 PROTOTYPE: $
1758 CODE: 3694 CODE:
1759 RETVAL = boolSV (!!coro->cctx); 3695 /* maybe manage the running flag differently */
3696 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1760 OUTPUT: 3697 OUTPUT:
1761 RETVAL 3698 RETVAL
1762 3699
1763int 3700int
1764is_traced (Coro::State coro) 3701is_traced (Coro::State coro)
… …
1766 CODE: 3703 CODE:
1767 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3704 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1768 OUTPUT: 3705 OUTPUT:
1769 RETVAL 3706 RETVAL
1770 3707
1771IV 3708UV
1772rss (Coro::State coro) 3709rss (Coro::State coro)
1773 PROTOTYPE: $ 3710 PROTOTYPE: $
1774 ALIAS: 3711 ALIAS:
1775 usecount = 1 3712 usecount = 1
1776 CODE: 3713 CODE:
… …
1780 case 1: RETVAL = coro->usecount; break; 3717 case 1: RETVAL = coro->usecount; break;
1781 } 3718 }
1782 OUTPUT: 3719 OUTPUT:
1783 RETVAL 3720 RETVAL
1784 3721
3722void
3723force_cctx ()
3724 PROTOTYPE:
3725 CODE:
3726 cctx_current->idle_sp = 0;
3727
3728void
3729swap_defsv (Coro::State self)
3730 PROTOTYPE: $
3731 ALIAS:
3732 swap_defav = 1
3733 CODE:
3734 if (!self->slot)
3735 croak ("cannot swap state with coroutine that has no saved state,");
3736 else
3737 {
3738 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3739 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3740
3741 SV *tmp = *src; *src = *dst; *dst = tmp;
3742 }
3743
3744void
3745cancel (Coro::State self)
3746 CODE:
3747 coro_state_destroy (aTHX_ self);
3748
3749SV *
3750enable_times (int enabled = enable_times)
3751 CODE:
3752{
3753 RETVAL = boolSV (enable_times);
3754
3755 if (enabled != enable_times)
3756 {
3757 enable_times = enabled;
3758
3759 coro_times_update ();
3760 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3761 }
3762}
3763 OUTPUT:
3764 RETVAL
3765
3766void
3767times (Coro::State self)
3768 PPCODE:
3769{
3770 struct coro *current = SvSTATE (coro_current);
3771
3772 if (ecb_expect_false (current == self))
3773 {
3774 coro_times_update ();
3775 coro_times_add (SvSTATE (coro_current));
3776 }
3777
3778 EXTEND (SP, 2);
3779 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3780 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3781
3782 if (ecb_expect_false (current == self))
3783 coro_times_sub (SvSTATE (coro_current));
3784}
3785
3786void
3787swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3788 CODE:
3789{
3790 struct coro *current = SvSTATE_current;
3791
3792 if (current == coro)
3793 SWAP_SVS (current);
3794
3795 if (!coro->swap_sv)
3796 coro->swap_sv = newAV ();
3797
3798 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3799 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3800
3801 if (current == coro)
3802 SWAP_SVS (current);
3803}
3804
1785 3805
1786MODULE = Coro::State PACKAGE = Coro 3806MODULE = Coro::State PACKAGE = Coro
1787 3807
1788BOOT: 3808BOOT:
1789{ 3809{
1790 int i;
1791
1792 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1793 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3812 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3813 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1794 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3815 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3816 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3817 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1795 3818
1796 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3819 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1797 SvREADONLY_on (coro_current); 3820 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3821 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3822 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1798 3823
1799 coro_stash = gv_stashpv ("Coro", TRUE); 3824 coro_stash = gv_stashpv ("Coro", TRUE);
1800 3825
1801 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3826 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1802 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3827 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1803 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3828 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1804 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3829 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1805 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3830 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1806 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3831 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1807
1808 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1809 coro_ready[i] = newAV ();
1810 3832
1811 { 3833 {
1812 SV *sv = perl_get_sv ("Coro::API", TRUE); 3834 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1813 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1814 3835
1815 coroapi.schedule = api_schedule; 3836 coroapi.schedule = api_schedule;
3837 coroapi.schedule_to = api_schedule_to;
1816 coroapi.cede = api_cede; 3838 coroapi.cede = api_cede;
1817 coroapi.cede_notself = api_cede_notself; 3839 coroapi.cede_notself = api_cede_notself;
1818 coroapi.ready = api_ready; 3840 coroapi.ready = api_ready;
1819 coroapi.is_ready = api_is_ready; 3841 coroapi.is_ready = api_is_ready;
1820 coroapi.nready = &coro_nready; 3842 coroapi.nready = coro_nready;
1821 coroapi.current = coro_current; 3843 coroapi.current = coro_current;
1822 3844
1823 GCoroAPI = &coroapi; 3845 /*GCoroAPI = &coroapi;*/
1824 sv_setiv (sv, (IV)&coroapi); 3846 sv_setiv (sv, (IV)&coroapi);
1825 SvREADONLY_on (sv); 3847 SvREADONLY_on (sv);
1826 } 3848 }
1827} 3849}
3850
3851SV *
3852async (...)
3853 PROTOTYPE: &@
3854 CODE:
3855 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3856 api_ready (aTHX_ RETVAL);
3857 OUTPUT:
3858 RETVAL
3859
3860void
3861_destroy (Coro::State coro)
3862 CODE:
3863 /* used by the manager thread */
3864 coro_state_destroy (aTHX_ coro);
3865
3866void
3867on_destroy (Coro::State coro, SV *cb)
3868 CODE:
3869 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3870
3871void
3872join (...)
3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_join);
3875
3876void
3877terminate (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3880
3881void
3882cancel (...)
3883 CODE:
3884 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3885
3886int
3887safe_cancel (Coro::State self, ...)
3888 C_ARGS: aTHX_ self, &ST (1), items - 1
3889
3890void
3891schedule (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3894
3895void
3896schedule_to (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3899
3900void
3901cede_to (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3904
3905void
3906cede (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_cede);
3909
3910void
3911cede_notself (...)
3912 CODE:
3913 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1828 3914
1829void 3915void
1830_set_current (SV *current) 3916_set_current (SV *current)
1831 PROTOTYPE: $ 3917 PROTOTYPE: $
1832 CODE: 3918 CODE:
1833 SvREFCNT_dec (SvRV (coro_current)); 3919 SvREFCNT_dec (SvRV (coro_current));
1834 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3920 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3921
3922void
3923_set_readyhook (SV *hook)
3924 PROTOTYPE: $
3925 CODE:
3926 SvREFCNT_dec (coro_readyhook);
3927 SvGETMAGIC (hook);
3928 if (SvOK (hook))
3929 {
3930 coro_readyhook = newSVsv (hook);
3931 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3932 }
3933 else
3934 {
3935 coro_readyhook = 0;
3936 CORO_READYHOOK = 0;
3937 }
1835 3938
1836int 3939int
1837prio (Coro::State coro, int newprio = 0) 3940prio (Coro::State coro, int newprio = 0)
3941 PROTOTYPE: $;$
1838 ALIAS: 3942 ALIAS:
1839 nice = 1 3943 nice = 1
1840 CODE: 3944 CODE:
1841{ 3945{
1842 RETVAL = coro->prio; 3946 RETVAL = coro->prio;
… …
1844 if (items > 1) 3948 if (items > 1)
1845 { 3949 {
1846 if (ix) 3950 if (ix)
1847 newprio = coro->prio - newprio; 3951 newprio = coro->prio - newprio;
1848 3952
1849 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3953 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1850 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3954 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1851 3955
1852 coro->prio = newprio; 3956 coro->prio = newprio;
1853 } 3957 }
1854} 3958}
1855 OUTPUT: 3959 OUTPUT:
… …
1857 3961
1858SV * 3962SV *
1859ready (SV *self) 3963ready (SV *self)
1860 PROTOTYPE: $ 3964 PROTOTYPE: $
1861 CODE: 3965 CODE:
1862 RETVAL = boolSV (api_ready (self)); 3966 RETVAL = boolSV (api_ready (aTHX_ self));
1863 OUTPUT: 3967 OUTPUT:
1864 RETVAL 3968 RETVAL
1865 3969
1866int 3970int
1867nready (...) 3971nready (...)
… …
1870 RETVAL = coro_nready; 3974 RETVAL = coro_nready;
1871 OUTPUT: 3975 OUTPUT:
1872 RETVAL 3976 RETVAL
1873 3977
1874void 3978void
1875throw (Coro::State self, SV *throw = &PL_sv_undef) 3979suspend (Coro::State self)
1876 PROTOTYPE: $;$ 3980 PROTOTYPE: $
1877 CODE: 3981 CODE:
1878 SvREFCNT_dec (self->throw); 3982 self->flags |= CF_SUSPENDED;
1879 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1880 3983
1881# for async_pool speedup
1882void 3984void
1883_pool_1 (SV *cb) 3985resume (Coro::State self)
3986 PROTOTYPE: $
1884 CODE: 3987 CODE:
1885{ 3988 self->flags &= ~CF_SUSPENDED;
1886 struct coro *coro = SvSTATE (coro_current);
1887 HV *hv = (HV *)SvRV (coro_current);
1888 AV *defav = GvAV (PL_defgv);
1889 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1890 AV *invoke_av;
1891 int i, len;
1892 3989
1893 if (!invoke) 3990void
1894 croak ("\3async_pool terminate\2\n"); 3991_pool_handler (...)
3992 CODE:
3993 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1895 3994
1896 SvREFCNT_dec (coro->saved_deffh); 3995void
1897 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3996async_pool (SV *cv, ...)
3997 PROTOTYPE: &@
3998 PPCODE:
3999{
4000 HV *hv = (HV *)av_pop (av_async_pool);
4001 AV *av = newAV ();
4002 SV *cb = ST (0);
4003 int i;
1898 4004
1899 hv_store (hv, "desc", sizeof ("desc") - 1, 4005 av_extend (av, items - 2);
1900 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 4006 for (i = 1; i < items; ++i)
4007 av_push (av, SvREFCNT_inc_NN (ST (i)));
1901 4008
1902 invoke_av = (AV *)SvRV (invoke); 4009 if ((SV *)hv == &PL_sv_undef)
1903 len = av_len (invoke_av);
1904
1905 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1906
1907 if (len > 0)
1908 { 4010 {
1909 av_fill (defav, len - 1); 4011 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1910 for (i = 0; i < len; ++i) 4012 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1911 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4013 SvREFCNT_dec (sv);
1912 } 4014 }
1913 4015
4016 {
4017 struct coro *coro = SvSTATE_hv (hv);
4018
4019 assert (!coro->invoke_cb);
4020 assert (!coro->invoke_av);
4021 coro->invoke_cb = SvREFCNT_inc (cb);
4022 coro->invoke_av = av;
4023 }
4024
4025 api_ready (aTHX_ (SV *)hv);
4026
4027 if (GIMME_V != G_VOID)
4028 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4029 else
1914 SvREFCNT_dec (invoke); 4030 SvREFCNT_dec (hv);
1915} 4031}
1916 4032
1917void 4033SV *
1918_pool_2 (SV *cb) 4034rouse_cb ()
4035 PROTOTYPE:
1919 CODE: 4036 CODE:
1920{ 4037 RETVAL = coro_new_rouse_cb (aTHX);
1921 struct coro *coro = SvSTATE (coro_current);
1922
1923 sv_setsv (cb, &PL_sv_undef);
1924
1925 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1926 coro->saved_deffh = 0;
1927
1928 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1929 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1930 croak ("\3async_pool terminate\2\n");
1931
1932 av_clear (GvAV (PL_defgv));
1933 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1934 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1935
1936 coro->prio = 0;
1937
1938 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1939 api_trace (coro_current, 0);
1940
1941 av_push (av_async_pool, newSVsv (coro_current));
1942}
1943
1944
1945MODULE = Coro::State PACKAGE = Coro::AIO
1946
1947SV *
1948_get_state ()
1949 CODE:
1950{
1951 struct io_state *data;
1952
1953 RETVAL = newSV (sizeof (struct io_state));
1954 data = (struct io_state *)SvPVX (RETVAL);
1955 SvCUR_set (RETVAL, sizeof (struct io_state));
1956 SvPOK_only (RETVAL);
1957
1958 data->errorno = errno;
1959 data->laststype = PL_laststype;
1960 data->laststatval = PL_laststatval;
1961 data->statcache = PL_statcache;
1962}
1963 OUTPUT: 4038 OUTPUT:
1964 RETVAL 4039 RETVAL
1965 4040
1966void 4041void
1967_set_state (char *data_) 4042rouse_wait (...)
4043 PROTOTYPE: ;$
4044 PPCODE:
4045 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4046
4047void
4048on_enter (SV *block)
4049 ALIAS:
4050 on_leave = 1
1968 PROTOTYPE: $ 4051 PROTOTYPE: &
1969 CODE: 4052 CODE:
1970{ 4053{
1971 struct io_state *data = (void *)data_; 4054 struct coro *coro = SvSTATE_current;
4055 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1972 4056
1973 errno = data->errorno; 4057 block = s_get_cv_croak (block);
1974 PL_laststype = data->laststype;
1975 PL_laststatval = data->laststatval;
1976 PL_statcache = data->statcache;
1977}
1978 4058
4059 if (!*avp)
4060 *avp = newAV ();
4061
4062 av_push (*avp, SvREFCNT_inc (block));
4063
4064 if (!ix)
4065 on_enterleave_call (aTHX_ block);
4066
4067 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4068 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4069 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4070}
4071
4072
4073MODULE = Coro::State PACKAGE = PerlIO::cede
4074
4075BOOT:
4076 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4077
4078
4079MODULE = Coro::State PACKAGE = Coro::Semaphore
4080
4081SV *
4082new (SV *klass, SV *count = 0)
4083 CODE:
4084{
4085 int semcnt = 1;
4086
4087 if (count)
4088 {
4089 SvGETMAGIC (count);
4090
4091 if (SvOK (count))
4092 semcnt = SvIV (count);
4093 }
4094
4095 RETVAL = sv_bless (
4096 coro_waitarray_new (aTHX_ semcnt),
4097 GvSTASH (CvGV (cv))
4098 );
4099}
4100 OUTPUT:
4101 RETVAL
4102
4103# helper for Coro::Channel and others
4104SV *
4105_alloc (int count)
4106 CODE:
4107 RETVAL = coro_waitarray_new (aTHX_ count);
4108 OUTPUT:
4109 RETVAL
4110
4111SV *
4112count (SV *self)
4113 CODE:
4114 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4115 OUTPUT:
4116 RETVAL
4117
4118void
4119up (SV *self, int adjust = 1)
4120 ALIAS:
4121 adjust = 1
4122 CODE:
4123 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4124
4125void
4126down (...)
4127 CODE:
4128 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4129
4130void
4131wait (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4134
4135void
4136try (SV *self)
4137 PPCODE:
4138{
4139 AV *av = (AV *)SvRV (self);
4140 SV *count_sv = AvARRAY (av)[0];
4141 IV count = SvIVX (count_sv);
4142
4143 if (count > 0)
4144 {
4145 --count;
4146 SvIVX (count_sv) = count;
4147 XSRETURN_YES;
4148 }
4149 else
4150 XSRETURN_NO;
4151}
4152
4153void
4154waiters (SV *self)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (self);
4158 int wcount = AvFILLp (av) + 1 - 1;
4159
4160 if (GIMME_V == G_SCALAR)
4161 XPUSHs (sv_2mortal (newSViv (wcount)));
4162 else
4163 {
4164 int i;
4165 EXTEND (SP, wcount);
4166 for (i = 1; i <= wcount; ++i)
4167 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4168 }
4169}
4170
4171MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4172
4173void
4174_may_delete (SV *sem, int count, unsigned int extra_refs)
4175 PPCODE:
4176{
4177 AV *av = (AV *)SvRV (sem);
4178
4179 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4180 && AvFILLp (av) == 0 /* no waiters, just count */
4181 && SvIV (AvARRAY (av)[0]) == count)
4182 XSRETURN_YES;
4183
4184 XSRETURN_NO;
4185}
4186
4187MODULE = Coro::State PACKAGE = Coro::Signal
4188
4189SV *
4190new (SV *klass)
4191 CODE:
4192 RETVAL = sv_bless (
4193 coro_waitarray_new (aTHX_ 0),
4194 GvSTASH (CvGV (cv))
4195 );
4196 OUTPUT:
4197 RETVAL
4198
4199void
4200wait (...)
4201 CODE:
4202 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4203
4204void
4205broadcast (SV *self)
4206 CODE:
4207{
4208 AV *av = (AV *)SvRV (self);
4209 coro_signal_wake (aTHX_ av, AvFILLp (av));
4210}
4211
4212void
4213send (SV *self)
4214 CODE:
4215{
4216 AV *av = (AV *)SvRV (self);
4217
4218 if (AvFILLp (av))
4219 coro_signal_wake (aTHX_ av, 1);
4220 else
4221 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4222}
4223
4224IV
4225awaited (SV *self)
4226 CODE:
4227 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4228 OUTPUT:
4229 RETVAL
4230
4231
4232MODULE = Coro::State PACKAGE = Coro::AnyEvent
4233
4234BOOT:
4235 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4236
4237void
4238_schedule (...)
4239 CODE:
4240{
4241 static int incede;
4242
4243 api_cede_notself (aTHX);
4244
4245 ++incede;
4246 while (coro_nready >= incede && api_cede (aTHX))
4247 ;
4248
4249 sv_setsv (sv_activity, &PL_sv_undef);
4250 if (coro_nready >= incede)
4251 {
4252 PUSHMARK (SP);
4253 PUTBACK;
4254 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4255 }
4256
4257 --incede;
4258}
4259
4260
4261MODULE = Coro::State PACKAGE = Coro::AIO
4262
4263void
4264_register (char *target, char *proto, SV *req)
4265 CODE:
4266{
4267 SV *req_cv = s_get_cv_croak (req);
4268 /* newXSproto doesn't return the CV on 5.8 */
4269 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4270 sv_setpv ((SV *)slf_cv, proto);
4271 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4272}
4273
4274MODULE = Coro::State PACKAGE = Coro::Select
4275
4276void
4277patch_pp_sselect ()
4278 CODE:
4279 if (!coro_old_pp_sselect)
4280 {
4281 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4282 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4283 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4284 }
4285
4286void
4287unpatch_pp_sselect ()
4288 CODE:
4289 if (coro_old_pp_sselect)
4290 {
4291 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4292 coro_old_pp_sselect = 0;
4293 }
4294
4295MODULE = Coro::State PACKAGE = Coro::Util
4296
4297void
4298_exit (int code)
4299 CODE:
4300 _exit (code);
4301
4302NV
4303time ()
4304 CODE:
4305 RETVAL = nvtime (aTHX);
4306 OUTPUT:
4307 RETVAL
4308
4309NV
4310gettimeofday ()
4311 PPCODE:
4312{
4313 UV tv [2];
4314 u2time (aTHX_ tv);
4315 EXTEND (SP, 2);
4316 PUSHs (sv_2mortal (newSVuv (tv [0])));
4317 PUSHs (sv_2mortal (newSVuv (tv [1])));
4318}
4319

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