--- Coro/Coro/State.xs 2006/11/25 01:14:11 1.91 +++ Coro/Coro/State.xs 2008/11/18 05:55:04 1.291 @@ -1,14 +1,65 @@ -#define PERL_NO_GET_CONTEXT - #include "libcoro/coro.c" +#define PERL_NO_GET_CONTEXT +#define PERL_EXT + #include "EXTERN.h" #include "perl.h" #include "XSUB.h" +#include "perliol.h" #include "patchlevel.h" -#if PERL_VERSION < 6 +#include +#include +#include + +#ifdef WIN32 +# undef setjmp +# undef longjmp +# undef _exit +# define setjmp _setjmp // deep magic, don't ask +#else +# include /* most portable stdint.h */ +#endif + +#ifdef HAVE_MMAP +# include +# include +# ifndef MAP_ANONYMOUS +# ifdef MAP_ANON +# define MAP_ANONYMOUS MAP_ANON +# else +# undef HAVE_MMAP +# endif +# endif +# include +# ifndef PAGESIZE +# define PAGESIZE pagesize +# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) +static long pagesize; +# else +# define BOOT_PAGESIZE (void)0 +# endif +#else +# define PAGESIZE 0 +# define BOOT_PAGESIZE (void)0 +#endif + +#if CORO_USE_VALGRIND +# include +#endif + +/* the maximum number of idle cctx that will be pooled */ +static int cctx_max_idle = 4; + +#define PERL_VERSION_ATLEAST(a,b,c) \ + (PERL_REVISION > (a) \ + || (PERL_REVISION == (a) \ + && (PERL_VERSION > (b) \ + || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) + +#if !PERL_VERSION_ATLEAST (5,6,0) # ifndef PL_ppaddr # define PL_ppaddr ppaddr # endif @@ -29,132 +80,248 @@ # endif #endif -#include +/* 5.11 */ +#ifndef CxHASARGS +# define CxHASARGS(cx) (cx)->blk_sub.hasargs +#endif -#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 -# undef STACKGUARD +/* 5.10.0 */ +#ifndef SvREFCNT_inc_NN +# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv) #endif -#ifndef STACKGUARD -# define STACKGUARD 0 +/* 5.8.8 */ +#ifndef GV_NOTQUAL +# define GV_NOTQUAL 0 +#endif +#ifndef newSV +# define newSV(l) NEWSV(0,l) +#endif +#ifndef CvISXSUB_on +# define CvISXSUB_on(cv) (void)cv #endif -#ifdef HAVE_MMAP -# include -# include -# ifndef MAP_ANONYMOUS -# ifdef MAP_ANON -# define MAP_ANONYMOUS MAP_ANON -# else -# undef HAVE_MMAP -# endif -# endif -# include -# ifndef PAGESIZE -# define PAGESIZE pagesize -# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) -static long pagesize; -# else -# define BOOT_PAGESIZE -# endif +/* 5.8.7 */ +#ifndef SvRV_set +# define SvRV_set(s,v) SvRV(s) = (v) +#endif + +#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 +# undef CORO_STACKGUARD +#endif + +#ifndef CORO_STACKGUARD +# define CORO_STACKGUARD 0 #endif -#define SUB_INIT "Coro::State::initialize" +/* prefer perl internal functions over our own? */ +#ifndef CORO_PREFER_PERL_FUNCTIONS +# define CORO_PREFER_PERL_FUNCTIONS 0 +#endif -/* The next macro should declare a variable stacklevel that contains and approximation - * to the current C stack pointer. Its property is that it changes with each call - * and should be unique. */ -#define dSTACKLEVEL void *stacklevel = &stacklevel +/* The next macros try to return the current stack pointer, in an as + * portable way as possible. */ +#if __GNUC__ >= 4 +# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) +#else +# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel +#endif #define IN_DESTRUCT (PL_main_cv == Nullcv) -#define labs(l) ((l) >= 0 ? (l) : -(l)) +#if __GNUC__ >= 3 +# define attribute(x) __attribute__(x) +# define expect(expr,value) __builtin_expect ((expr),(value)) +# define INLINE static inline +#else +# define attribute(x) +# define expect(expr,value) (expr) +# define INLINE static +#endif + +#define expect_false(expr) expect ((expr) != 0, 0) +#define expect_true(expr) expect ((expr) != 0, 1) + +#define NOINLINE attribute ((noinline)) #include "CoroAPI.h" #ifdef USE_ITHREADS -static perl_mutex coro_mutex; -# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) -# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) -#else -# define LOCK (void)0 -# define UNLOCK (void)0 +# if CORO_PTHREAD +static void *coro_thx; +# endif #endif +static double (*nvtime)(); /* so why doesn't it take void? */ + +/* we hijack an hopefully unused CV flag for our purposes */ +#define CVf_SLF 0x4000 +static OP *pp_slf (pTHX); + +static U32 cctx_gen; +static size_t cctx_stacksize = CORO_STACKSIZE; static struct CoroAPI coroapi; static AV *main_mainstack; /* used to differentiate between $main and others */ +static JMPENV *main_top_env; static HV *coro_state_stash, *coro_stash; -static SV *coro_mortal; /* will be freed after next transfer */ +static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ -/* this is actually not just the c stack but also c registers etc... */ -typedef struct coro_stack { - struct coro_stack *next; +static GV *irsgv; /* $/ */ +static GV *stdoutgv; /* *STDOUT */ +static SV *rv_diehook; +static SV *rv_warnhook; +static HV *hv_sig; /* %SIG */ + +/* async_pool helper stuff */ +static SV *sv_pool_rss; +static SV *sv_pool_size; +static AV *av_async_pool; + +/* Coro::AnyEvent */ +static SV *sv_activity; + +static struct coro_cctx *cctx_first; +static int cctx_count, cctx_idle; + +enum { + CC_MAPPED = 0x01, + CC_NOREUSE = 0x02, /* throw this away after tracing */ + CC_TRACE = 0x04, + CC_TRACE_SUB = 0x08, /* trace sub calls */ + CC_TRACE_LINE = 0x10, /* trace each statement */ + CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, +}; - void *idle_sp; +/* this is a structure representing a c-level coroutine */ +typedef struct coro_cctx +{ + struct coro_cctx *next; + + /* the stack */ void *sptr; - long ssize; /* positive == mmap, otherwise malloc */ + size_t ssize; /* cpu state */ + void *idle_sp; /* sp of top-level transfer/schedule/cede call */ + JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ + JMPENV *top_env; coro_context cctx; -} coro_stack; -static coro_stack *main_stack; + U32 gen; +#if CORO_USE_VALGRIND + int valgrind_id; +#endif + unsigned char flags; +} coro_cctx; -struct coro { - /* optionally saved, might be zero */ - AV *defav; +enum { + CF_RUNNING = 0x0001, /* coroutine is running */ + CF_READY = 0x0002, /* coroutine is ready */ + CF_NEW = 0x0004, /* has never been switched to */ + CF_DESTROYED = 0x0008, /* coroutine data has been freed */ +}; + +/* the structure where most of the perl state is stored, overlaid on the cxstack */ +typedef struct +{ SV *defsv; + AV *defav; SV *errsv; - - /* saved global state not related to stacks */ - U8 dowarn; - I32 in_eval; - - /* the c stack, if any */ - coro_stack *stack; - - /* the stacks and related info (callchain etc..) */ - PERL_SI *curstackinfo; - AV *curstack; + SV *irsgv; +#define VAR(name,type) type name; +# include "state.h" +#undef VAR +} perl_slots; + +#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) + +/* this is a structure representing a perl-level coroutine */ +struct coro { + /* the C coroutine allocated to this perl coroutine, if any */ + coro_cctx *cctx; + + /* state data */ + struct CoroSLF slf_frame; /* saved slf frame */ AV *mainstack; - SV **stack_sp; - OP *op; - SV **curpad; - AV *comppad; - CV *compcv; - SV **stack_base; - SV **stack_max; - SV **tmps_stack; - I32 tmps_floor; - I32 tmps_ix; - I32 tmps_max; - I32 *markstack; - I32 *markstack_ptr; - I32 *markstack_max; - I32 *scopestack; - I32 scopestack_ix; - I32 scopestack_max; - ANY *savestack; - I32 savestack_ix; - I32 savestack_max; - OP **retstack; - I32 retstack_ix; - I32 retstack_max; - PMOP *curpm; - COP *curcop; - JMPENV *top_env; + perl_slots *slot; /* basically the saved sp */ + + AV *args; /* data associated with this coroutine (initial args) */ + int refcnt; /* coroutines are refcounted, yes */ + int flags; /* CF_ flags */ + HV *hv; /* the perl hash associated with this coro, if any */ + void (*on_destroy)(pTHX_ struct coro *coro); + + /* statistics */ + int usecount; /* number of transfers to this coro */ /* coro process data */ int prio; + SV *throw; /* exception to be thrown */ - /* data associated with this coroutine (initial args) */ - AV *args; - int refcnt; + /* async_pool */ + SV *saved_deffh; + + /* linked list */ + struct coro *next, *prev; }; typedef struct coro *Coro__State; typedef struct coro *Coro__State_or_hashref; +/* the following variables are effectively part of the perl context */ +/* and get copied between struct coro and these variables */ +/* the mainr easonw e don't support windows process emulation */ +static struct CoroSLF slf_frame; /* the current slf frame */ +static SV *coro_throw; + +/** Coro ********************************************************************/ + +#define PRIO_MAX 3 +#define PRIO_HIGH 1 +#define PRIO_NORMAL 0 +#define PRIO_LOW -1 +#define PRIO_IDLE -3 +#define PRIO_MIN -4 + +/* for Coro.pm */ +static SV *coro_current; +static SV *coro_readyhook; +static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; +static struct coro *coro_first; +#define coro_nready coroapi.nready + +/** lowlevel stuff **********************************************************/ + +static SV * +coro_get_sv (pTHX_ const char *name, int create) +{ +#if PERL_VERSION_ATLEAST (5,10,0) + /* silence stupid and wrong 5.10 warning that I am unable to switch off */ + get_sv (name, create); +#endif + return get_sv (name, create); +} + +static AV * +coro_get_av (pTHX_ const char *name, int create) +{ +#if PERL_VERSION_ATLEAST (5,10,0) + /* silence stupid and wrong 5.10 warning that I am unable to switch off */ + get_av (name, create); +#endif + return get_av (name, create); +} + +static HV * +coro_get_hv (pTHX_ const char *name, int create) +{ +#if PERL_VERSION_ATLEAST (5,10,0) + /* silence stupid and wrong 5.10 warning that I am unable to switch off */ + get_hv (name, create); +#endif + return get_hv (name, create); +} + static AV * coro_clone_padlist (pTHX_ CV *cv) { @@ -163,15 +330,15 @@ newpadlist = newAV (); AvREAL_off (newpadlist); -#if PERL_VERSION < 9 - Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); -#else +#if PERL_VERSION_ATLEAST (5,10,0) Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); +#else + Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); #endif newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; --AvFILLp (padlist); - av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); + av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); av_store (newpadlist, 1, (SV *)newpad); return newpadlist; @@ -211,28 +378,77 @@ while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) free_padlist (aTHX_ padlist); - SvREFCNT_dec (av); + SvREFCNT_dec (av); /* sv_magicext increased the refcount */ return 0; } -#define PERL_MAGIC_coro PERL_MAGIC_ext +#define CORO_MAGIC_type_cv 26 +#define CORO_MAGIC_type_state PERL_MAGIC_ext + +static MGVTBL coro_cv_vtbl = { + 0, 0, 0, 0, + coro_cv_free +}; + +#define CORO_MAGIC_NN(sv, type) \ + (expect_true (SvMAGIC (sv)->mg_type == type) \ + ? SvMAGIC (sv) \ + : mg_find (sv, type)) + +#define CORO_MAGIC(sv, type) \ + (expect_true (SvMAGIC (sv)) \ + ? CORO_MAGIC_NN (sv, type) \ + : 0) + +#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) +#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state) + +INLINE struct coro * +SvSTATE_ (pTHX_ SV *coro) +{ + HV *stash; + MAGIC *mg; + + if (SvROK (coro)) + coro = SvRV (coro); + + if (expect_false (SvTYPE (coro) != SVt_PVHV)) + croak ("Coro::State object required"); + + stash = SvSTASH (coro); + if (expect_false (stash != coro_stash && stash != coro_state_stash)) + { + /* very slow, but rare, check */ + if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) + croak ("Coro::State object required"); + } + + mg = CORO_MAGIC_state (coro); + return (struct coro *)mg->mg_ptr; +} + +#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) -static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; +/* faster than SvSTATE, but expects a coroutine hv */ +#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr) +#define SvSTATE_current SvSTATE_hv (SvRV (coro_current)) /* the next two functions merely cache the padlists */ static void get_padlist (pTHX_ CV *cv) { - MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); + MAGIC *mg = CORO_MAGIC_cv (cv); + AV *av; - if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) - CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); + if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) + CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; else { -#if 0 - /* this should work - but it doesn't :( */ - CV *cp = Perl_cv_clone (aTHX_ cv); +#if CORO_PREFER_PERL_FUNCTIONS + /* this is probably cleaner? but also slower! */ + /* in practise, it seems to be less stable */ + CV *cp = Perl_cv_clone (cv); CvPADLIST (cv) = CvPADLIST (cp); CvPADLIST (cp) = 0; SvREFCNT_dec (cp); @@ -245,94 +461,65 @@ static void put_padlist (pTHX_ CV *cv) { - MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); + MAGIC *mg = CORO_MAGIC_cv (cv); + AV *av; - if (!mg) - { - sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); - mg = mg_find ((SV *)cv, PERL_MAGIC_coro); - mg->mg_virtual = &vtbl_coro; - mg->mg_obj = (SV *)newAV (); - } + if (expect_false (!mg)) + mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); - av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); -} + av = (AV *)mg->mg_obj; -#define SB do { -#define SE } while (0) + if (expect_false (AvFILLp (av) >= AvMAX (av))) + av_extend (av, AvMAX (av) + 1); -#define LOAD(state) load_state(aTHX_ (state)); -#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); + AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); +} -#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE +/** load & save, init *******************************************************/ static void -load_state(pTHX_ Coro__State c) +load_perl (pTHX_ Coro__State c) { - PL_dowarn = c->dowarn; - PL_in_eval = c->in_eval; + perl_slots *slot = c->slot; + c->slot = 0; - PL_curstackinfo = c->curstackinfo; - PL_curstack = c->curstack; PL_mainstack = c->mainstack; - PL_stack_sp = c->stack_sp; - PL_op = c->op; - PL_curpad = c->curpad; - PL_comppad = c->comppad; - PL_compcv = c->compcv; - PL_stack_base = c->stack_base; - PL_stack_max = c->stack_max; - PL_tmps_stack = c->tmps_stack; - PL_tmps_floor = c->tmps_floor; - PL_tmps_ix = c->tmps_ix; - PL_tmps_max = c->tmps_max; - PL_markstack = c->markstack; - PL_markstack_ptr = c->markstack_ptr; - PL_markstack_max = c->markstack_max; - PL_scopestack = c->scopestack; - PL_scopestack_ix = c->scopestack_ix; - PL_scopestack_max = c->scopestack_max; - PL_savestack = c->savestack; - PL_savestack_ix = c->savestack_ix; - PL_savestack_max = c->savestack_max; -#if PERL_VERSION < 9 - PL_retstack = c->retstack; - PL_retstack_ix = c->retstack_ix; - PL_retstack_max = c->retstack_max; -#endif - PL_curpm = c->curpm; - PL_curcop = c->curcop; - PL_top_env = c->top_env; - - if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); - if (c->defsv) REPLACE_SV (DEFSV , c->defsv); - if (c->errsv) REPLACE_SV (ERRSV , c->errsv); + + GvSV (PL_defgv) = slot->defsv; + GvAV (PL_defgv) = slot->defav; + GvSV (PL_errgv) = slot->errsv; + GvSV (irsgv) = slot->irsgv; + + #define VAR(name,type) PL_ ## name = slot->name; + # include "state.h" + #undef VAR { dSP; + CV *cv; /* now do the ugly restore mess */ - while ((cv = (CV *)POPs)) + while (expect_true (cv = (CV *)POPs)) { - AV *padlist = (AV *)POPs; - - if (padlist) - { - put_padlist (aTHX_ cv); /* mark this padlist as available */ - CvPADLIST(cv) = padlist; - } - - ++CvDEPTH(cv); + put_padlist (aTHX_ cv); /* mark this padlist as available */ + CvDEPTH (cv) = PTR2IV (POPs); + CvPADLIST (cv) = (AV *)POPs; } PUTBACK; } + + slf_frame = c->slf_frame; + coro_throw = c->throw; } static void -save_state(pTHX_ Coro__State c, int flags) +save_perl (pTHX_ Coro__State c) { + c->throw = coro_throw; + c->slf_frame = slf_frame; + { dSP; I32 cxix = cxstack_ix; @@ -344,107 +531,83 @@ * (and reinitialize) all cv's in the whole callchain :( */ - PUSHs (Nullsv); + XPUSHs (Nullsv); /* this loop was inspired by pp_caller */ for (;;) { - while (cxix >= 0) + while (expect_true (cxix >= 0)) { PERL_CONTEXT *cx = &ccstk[cxix--]; - if (CxTYPE(cx) == CXt_SUB) + if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) { CV *cv = cx->blk_sub.cv; - if (CvDEPTH(cv)) - { - EXTEND (SP, CvDEPTH(cv)*2); - while (--CvDEPTH(cv)) - { - /* this tells the restore code to increment CvDEPTH */ - PUSHs (Nullsv); - PUSHs ((SV *)cv); - } - - PUSHs ((SV *)CvPADLIST(cv)); + if (expect_true (CvDEPTH (cv))) + { + EXTEND (SP, 3); + PUSHs ((SV *)CvPADLIST (cv)); + PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv))); PUSHs ((SV *)cv); + CvDEPTH (cv) = 0; get_padlist (aTHX_ cv); } } -#ifdef CXt_FORMAT - else if (CxTYPE(cx) == CXt_FORMAT) - { - /* I never used formats, so how should I know how these are implemented? */ - /* my bold guess is as a simple, plain sub... */ - croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); - } -#endif } - if (top_si->si_type == PERLSI_MAIN) + if (expect_true (top_si->si_type == PERLSI_MAIN)) break; top_si = top_si->si_prev; - ccstk = top_si->si_cxstack; - cxix = top_si->si_cxix; + ccstk = top_si->si_cxstack; + cxix = top_si->si_cxix; } PUTBACK; } - c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; - c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; - c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; - - c->dowarn = PL_dowarn; - c->in_eval = PL_in_eval; + /* allocate some space on the context stack for our purposes */ + /* we manually unroll here, as usually 2 slots is enough */ + if (SLOT_COUNT >= 1) CXINC; + if (SLOT_COUNT >= 2) CXINC; + if (SLOT_COUNT >= 3) CXINC; + { + int i; + for (i = 3; i < SLOT_COUNT; ++i) + CXINC; + } + cxstack_ix -= SLOT_COUNT; /* undo allocation */ - c->curstackinfo = PL_curstackinfo; - c->curstack = PL_curstack; c->mainstack = PL_mainstack; - c->stack_sp = PL_stack_sp; - c->op = PL_op; - c->curpad = PL_curpad; - c->comppad = PL_comppad; - c->compcv = PL_compcv; - c->stack_base = PL_stack_base; - c->stack_max = PL_stack_max; - c->tmps_stack = PL_tmps_stack; - c->tmps_floor = PL_tmps_floor; - c->tmps_ix = PL_tmps_ix; - c->tmps_max = PL_tmps_max; - c->markstack = PL_markstack; - c->markstack_ptr = PL_markstack_ptr; - c->markstack_max = PL_markstack_max; - c->scopestack = PL_scopestack; - c->scopestack_ix = PL_scopestack_ix; - c->scopestack_max = PL_scopestack_max; - c->savestack = PL_savestack; - c->savestack_ix = PL_savestack_ix; - c->savestack_max = PL_savestack_max; -#if PERL_VERSION < 9 - c->retstack = PL_retstack; - c->retstack_ix = PL_retstack_ix; - c->retstack_max = PL_retstack_max; -#endif - c->curpm = PL_curpm; - c->curcop = PL_curcop; - c->top_env = PL_top_env; + + { + perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); + + slot->defav = GvAV (PL_defgv); + slot->defsv = DEFSV; + slot->errsv = ERRSV; + slot->irsgv = GvSV (irsgv); + + #define VAR(name,type) slot->name = PL_ ## name; + # include "state.h" + #undef VAR + } } /* - * allocate various perl stacks. This is an exact copy + * allocate various perl stacks. This is almost an exact copy * of perl.c:init_stacks, except that it uses less memory * on the (sometimes correct) assumption that coroutines do * not usually need a lot of stackspace. */ +#if CORO_PREFER_PERL_FUNCTIONS +# define coro_init_stacks init_stacks +#else static void coro_init_stacks (pTHX) { - LOCK; - - PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); + PL_curstackinfo = new_stackinfo(32, 8); PL_curstackinfo->si_type = PERLSI_MAIN; PL_curstack = PL_curstackinfo->si_stack; PL_mainstack = PL_curstack; /* remember in case we switch stacks */ @@ -453,10 +616,10 @@ PL_stack_sp = PL_stack_base; PL_stack_max = PL_stack_base + AvMAX(PL_curstack); - New(50,PL_tmps_stack,96,SV*); + New(50,PL_tmps_stack,32,SV*); PL_tmps_floor = -1; PL_tmps_ix = -1; - PL_tmps_max = 96; + PL_tmps_max = 32; New(54,PL_markstack,16,I32); PL_markstack_ptr = PL_markstack; @@ -466,40 +629,28 @@ SET_MARK_OFFSET; #endif - New(54,PL_scopestack,16,I32); + New(54,PL_scopestack,8,I32); PL_scopestack_ix = 0; - PL_scopestack_max = 16; + PL_scopestack_max = 8; - New(54,PL_savestack,96,ANY); + New(54,PL_savestack,24,ANY); PL_savestack_ix = 0; - PL_savestack_max = 96; + PL_savestack_max = 24; -#if PERL_VERSION < 9 - New(54,PL_retstack,8,OP*); +#if !PERL_VERSION_ATLEAST (5,10,0) + New(54,PL_retstack,4,OP*); PL_retstack_ix = 0; - PL_retstack_max = 8; + PL_retstack_max = 4; #endif - - UNLOCK; } +#endif /* * destroy the stacks, the callchain etc... */ static void -destroy_stacks(pTHX) +coro_destruct_stacks (pTHX) { - if (!IN_DESTRUCT) - { - /* is this ugly, I ask? */ - LEAVE_SCOPE (0); - - /* sure it is, but more important: is it correct?? :/ */ - FREETMPS; - - /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ - } - while (PL_curstackinfo->si_next) PL_curstackinfo = PL_curstackinfo->si_next; @@ -507,17 +658,8 @@ { PERL_SI *p = PL_curstackinfo->si_prev; - { /*D*//*remove*/ - dSP; - SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); - PUTBACK; /* possibly superfluous */ - } - if (!IN_DESTRUCT) - { - dounwind (-1);/*D*//*remove*/ - SvREFCNT_dec (PL_curstackinfo->si_stack); - } + SvREFCNT_dec (PL_curstackinfo->si_stack); Safefree (PL_curstackinfo->si_cxstack); Safefree (PL_curstackinfo); @@ -528,248 +670,795 @@ Safefree (PL_markstack); Safefree (PL_scopestack); Safefree (PL_savestack); -#if PERL_VERSION < 9 +#if !PERL_VERSION_ATLEAST (5,10,0) Safefree (PL_retstack); #endif } +static size_t +coro_rss (pTHX_ struct coro *coro) +{ + size_t rss = sizeof (*coro); + + if (coro->mainstack) + { + perl_slots tmp_slot; + perl_slots *slot; + + if (coro->flags & CF_RUNNING) + { + slot = &tmp_slot; + + #define VAR(name,type) slot->name = PL_ ## name; + # include "state.h" + #undef VAR + } + else + slot = coro->slot; + + if (slot) + { + rss += sizeof (slot->curstackinfo); + rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); + rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); + rss += slot->tmps_max * sizeof (SV *); + rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); + rss += slot->scopestack_max * sizeof (I32); + rss += slot->savestack_max * sizeof (ANY); + +#if !PERL_VERSION_ATLEAST (5,10,0) + rss += slot->retstack_max * sizeof (OP *); +#endif + } + } + + return rss; +} + +/** coroutine stack handling ************************************************/ + +static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); +static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); +static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg); + +/* apparently < 5.8.8 */ +#ifndef MgPV_nolen_const +#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ + SvPV_nolen((SV*)((mg)->mg_ptr)) : \ + (const char*)(mg)->mg_ptr) +#endif + +/* + * This overrides the default magic get method of %SIG elements. + * The original one doesn't provide for reading back of PL_diehook/PL_warnhook + * and instead of tryign to save and restore the hash elements, we just provide + * readback here. + * We only do this when the hook is != 0, as they are often set to 0 temporarily, + * not expecting this to actually change the hook. This is a potential problem + * when a schedule happens then, but we ignore this. + */ +static int +coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) +{ + const char *s = MgPV_nolen_const (mg); + + if (*s == '_') + { + SV **svp = 0; + + if (strEQ (s, "__DIE__" )) svp = &PL_diehook; + if (strEQ (s, "__WARN__")) svp = &PL_warnhook; + + if (svp) + { + sv_setsv (sv, *svp ? *svp : &PL_sv_undef); + return 0; + } + } + + return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; +} + +static int +coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg) +{ + const char *s = MgPV_nolen_const (mg); + + if (*s == '_') + { + SV **svp = 0; + + if (strEQ (s, "__DIE__" )) svp = &PL_diehook; + if (strEQ (s, "__WARN__")) svp = &PL_warnhook; + + if (svp) + { + SV *old = *svp; + *svp = 0; + SvREFCNT_dec (old); + return 0; + } + } + + return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0; +} + +static int +coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) +{ + const char *s = MgPV_nolen_const (mg); + + if (*s == '_') + { + SV **svp = 0; + + if (strEQ (s, "__DIE__" )) svp = &PL_diehook; + if (strEQ (s, "__WARN__")) svp = &PL_warnhook; + + if (svp) + { + SV *old = *svp; + *svp = newSVsv (sv); + SvREFCNT_dec (old); + return 0; + } + } + + return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; +} + static void -setup_coro (struct coro *coro) +prepare_nop (pTHX_ struct coro_transfer_args *ta) +{ + /* kind of mega-hacky, but works */ + ta->next = ta->prev = (struct coro *)ta; +} + +static int +slf_check_nop (pTHX_ struct CoroSLF *frame) +{ + return 0; +} + +static UNOP coro_setup_op; + +static void NOINLINE /* noinline to keep it out of the transfer fast path */ +coro_setup (pTHX_ struct coro *coro) { /* * emulate part of the perl startup here. */ - dTHX; - dSP; - UNOP myop; - SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE); - coro_init_stacks (aTHX); - /*PL_curcop = 0;*/ - /*PL_in_eval = PL_in_eval;*/ /* inherit */ - SvREFCNT_dec (GvAV (PL_defgv)); - GvAV (PL_defgv) = coro->args; coro->args = 0; - SPAGAIN; + PL_runops = RUNOPS_DEFAULT; + PL_curcop = &PL_compiling; + PL_in_eval = EVAL_NULL; + PL_comppad = 0; + PL_curpm = 0; + PL_curpad = 0; + PL_localizing = 0; + PL_dirty = 0; + PL_restartop = 0; +#if PERL_VERSION_ATLEAST (5,10,0) + PL_parser = 0; +#endif + + /* recreate the die/warn hooks */ + PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); + PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); + + GvSV (PL_defgv) = newSV (0); + GvAV (PL_defgv) = coro->args; coro->args = 0; + GvSV (PL_errgv) = newSV (0); + GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); + PL_rs = newSVsv (GvSV (irsgv)); + PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); - Zero (&myop, 1, UNOP); - myop.op_next = Nullop; - myop.op_flags = OPf_WANT_VOID; + { + dSP; + UNOP myop; - PL_op = (OP *)&myop; + Zero (&myop, 1, UNOP); + myop.op_next = Nullop; + myop.op_flags = OPf_WANT_VOID; - PUSHMARK(SP); - XPUSHs (sub_init); - PUTBACK; - PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); - SPAGAIN; + PUSHMARK (SP); + XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); + PUTBACK; + PL_op = (OP *)&myop; + PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); + SPAGAIN; + } - ENTER; /* necessary e.g. for dounwind */ + /* this newly created coroutine might be run on an existing cctx which most + * likely was suspended in pp_slf, so we have to emulate entering pp_slf here. + */ + slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ + slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */ + + /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */ + coro_setup_op.op_type = OP_CUSTOM; + coro_setup_op.op_ppaddr = pp_slf; + coro_setup_op.op_next = PL_op; + + PL_op = (OP *)&coro_setup_op; + + /* copy throw, in case it was set before coro_setup */ + coro_throw = coro->throw; } static void -transfer_tail () +coro_destruct (pTHX_ struct coro *coro) +{ + if (!IN_DESTRUCT) + { + /* restore all saved variables and stuff */ + LEAVE_SCOPE (0); + assert (PL_tmps_floor == -1); + + /* free all temporaries */ + FREETMPS; + assert (PL_tmps_ix == -1); + + /* unwind all extra stacks */ + POPSTACK_TO (PL_mainstack); + + /* unwind main stack */ + dounwind (-1); + } + + SvREFCNT_dec (GvSV (PL_defgv)); + SvREFCNT_dec (GvAV (PL_defgv)); + SvREFCNT_dec (GvSV (PL_errgv)); + SvREFCNT_dec (PL_defoutgv); + SvREFCNT_dec (PL_rs); + SvREFCNT_dec (GvSV (irsgv)); + + SvREFCNT_dec (PL_diehook); + SvREFCNT_dec (PL_warnhook); + + SvREFCNT_dec (coro->saved_deffh); + SvREFCNT_dec (coro_throw); + + coro_destruct_stacks (aTHX); +} + +INLINE void +free_coro_mortal (pTHX) { - if (coro_mortal) + if (expect_true (coro_mortal)) { SvREFCNT_dec (coro_mortal); coro_mortal = 0; } +} + +static int +runops_trace (pTHX) +{ + COP *oldcop = 0; + int oldcxix = -2; + struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */ + coro_cctx *cctx = coro->cctx; + + while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) + { + PERL_ASYNC_CHECK (); + + if (cctx->flags & CC_TRACE_ALL) + { + if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) + { + PERL_CONTEXT *cx = &cxstack[cxstack_ix]; + SV **bot, **top; + AV *av = newAV (); /* return values */ + SV **cb; + dSP; + + GV *gv = CvGV (cx->blk_sub.cv); + SV *fullname = sv_2mortal (newSV (0)); + if (isGV (gv)) + gv_efullname3 (fullname, gv, 0); + + bot = PL_stack_base + cx->blk_oldsp + 1; + top = cx->blk_gimme == G_ARRAY ? SP + 1 + : cx->blk_gimme == G_SCALAR ? bot + 1 + : bot; + + av_extend (av, top - bot); + while (bot < top) + av_push (av, SvREFCNT_inc_NN (*bot++)); + + PL_runops = RUNOPS_DEFAULT; + ENTER; + SAVETMPS; + EXTEND (SP, 3); + PUSHMARK (SP); + PUSHs (&PL_sv_no); + PUSHs (fullname); + PUSHs (sv_2mortal (newRV_noinc ((SV *)av))); + PUTBACK; + cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); + if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + SPAGAIN; + FREETMPS; + LEAVE; + PL_runops = runops_trace; + } + + if (oldcop != PL_curcop) + { + oldcop = PL_curcop; + + if (PL_curcop != &PL_compiling) + { + SV **cb; + + if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) + { + PERL_CONTEXT *cx = &cxstack[cxstack_ix]; + + if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) + { + runops_proc_t old_runops = PL_runops; + dSP; + GV *gv = CvGV (cx->blk_sub.cv); + SV *fullname = sv_2mortal (newSV (0)); + + if (isGV (gv)) + gv_efullname3 (fullname, gv, 0); + + PL_runops = RUNOPS_DEFAULT; + ENTER; + SAVETMPS; + EXTEND (SP, 3); + PUSHMARK (SP); + PUSHs (&PL_sv_yes); + PUSHs (fullname); + PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); + PUTBACK; + cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); + if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + SPAGAIN; + FREETMPS; + LEAVE; + PL_runops = runops_trace; + } + + oldcxix = cxstack_ix; + } + + if (cctx->flags & CC_TRACE_LINE) + { + dSP; + + PL_runops = RUNOPS_DEFAULT; + ENTER; + SAVETMPS; + EXTEND (SP, 3); + PL_runops = RUNOPS_DEFAULT; + PUSHMARK (SP); + PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); + PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); + PUTBACK; + cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0); + if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + SPAGAIN; + FREETMPS; + LEAVE; + PL_runops = runops_trace; + } + } + } + } + } - UNLOCK; + TAINT_NOT; + return 0; } +static struct coro_cctx *cctx_ssl_cctx; +static struct CoroSLF cctx_ssl_frame; + static void -coro_run (void *arg) +slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta) { - /* - * this is a _very_ stripped down perl interpreter ;) - */ - dTHX; + ta->prev = (struct coro *)cctx_ssl_cctx; + ta->next = 0; +} - transfer_tail (); +static int +slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame) +{ + *frame = cctx_ssl_frame; + + return 1; +} +/* initialises PL_top_env and injects a pseudo-slf-call to sett he stacklevel */ +static void NOINLINE +cctx_prepare (pTHX_ coro_cctx *cctx) +{ PL_top_env = &PL_start_env; - PL_restartop = PL_op; - /* somebody will hit me for both perl_run and PL_restart_top */ - perl_run (aTHX_ PERL_GET_CONTEXT); - abort (); + if (cctx->flags & CC_TRACE) + PL_runops = runops_trace; + + /* we already must be in an SLF call, there is no other valid way + * that can lead to creation of a new cctx */ + assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)", + slf_frame.prepare && PL_op->op_ppaddr == pp_slf)); + + cctx_ssl_cctx = cctx; + cctx_ssl_frame = slf_frame; + + slf_frame.prepare = slf_prepare_set_stacklevel; + slf_frame.check = slf_check_set_stacklevel; } -static coro_stack * -stack_new () +/* the tail of transfer: execute stuff we can only do after a transfer */ +INLINE void +transfer_tail (pTHX) { - coro_stack *stack; + free_coro_mortal (aTHX); +} - New (0, stack, 1, coro_stack); +/* + * this is a _very_ stripped down perl interpreter ;) + */ +static void +cctx_run (void *arg) +{ +#ifdef USE_ITHREADS +# if CORO_PTHREAD + PERL_SET_CONTEXT (coro_thx); +# endif +#endif + { + dTHX; -#if HAVE_MMAP + /* normally we would need to skip the entersub here */ + /* not doing so will re-execute it, which is exactly what we want */ + /* PL_nop = PL_nop->op_next */ - stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ - stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); + /* inject a fake subroutine call to cctx_init */ + cctx_prepare (aTHX_ (coro_cctx *)arg); - if (stack->sptr == (void *)-1) - { - fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n"); - _exit (EXIT_FAILURE); - } + /* cctx_run is the alternative tail of transfer() */ + transfer_tail (aTHX); - mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); + /* somebody or something will hit me for both perl_run and PL_restartop */ + PL_restartop = PL_op; + perl_run (PL_curinterp); -#else + /* + * If perl-run returns we assume exit() was being called or the coro + * fell off the end, which seems to be the only valid (non-bug) + * reason for perl_run to return. We try to exit by jumping to the + * bootstrap-time "top" top_env, as we cannot restore the "main" + * coroutine as Coro has no such concept + */ + PL_top_env = main_top_env; + JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ + } +} - stack->ssize = STACKSIZE * (long)sizeof (long); - New (0, stack->sptr, STACKSIZE, long); +static coro_cctx * +cctx_new () +{ + coro_cctx *cctx; - if (!stack->sptr) + ++cctx_count; + New (0, cctx, 1, coro_cctx); + + cctx->gen = cctx_gen; + cctx->flags = 0; + cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */ + + return cctx; +} + +/* create a new cctx only suitable as source */ +static coro_cctx * +cctx_new_empty () +{ + coro_cctx *cctx = cctx_new (); + + cctx->sptr = 0; + coro_create (&cctx->cctx, 0, 0, 0, 0); + + return cctx; +} + +/* create a new cctx suitable as destination/running a perl interpreter */ +static coro_cctx * +cctx_new_run () +{ + coro_cctx *cctx = cctx_new (); + void *stack_start; + size_t stack_size; + +#if HAVE_MMAP + cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; + /* mmap supposedly does allocate-on-write for us */ + cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); + + if (cctx->sptr != (void *)-1) { - fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n"); - _exit (EXIT_FAILURE); + #if CORO_STACKGUARD + mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); + #endif + stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE; + stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; + cctx->flags |= CC_MAPPED; } - + else #endif + { + cctx->ssize = cctx_stacksize * (long)sizeof (long); + New (0, cctx->sptr, cctx_stacksize, long); + + if (!cctx->sptr) + { + perror ("FATAL: unable to allocate stack for coroutine, exiting."); + _exit (EXIT_FAILURE); + } + + stack_start = cctx->sptr; + stack_size = cctx->ssize; + } + + #if CORO_USE_VALGRIND + cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size); + #endif - coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize); + coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); - return stack; + return cctx; } static void -stack_free (coro_stack *stack) +cctx_destroy (coro_cctx *cctx) { - if (!stack || stack == main_stack) + if (!cctx) return; + --cctx_count; + coro_destroy (&cctx->cctx); + + /* coro_transfer creates new, empty cctx's */ + if (cctx->sptr) + { + #if CORO_USE_VALGRIND + VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); + #endif + #if HAVE_MMAP - munmap (stack->sptr, stack->ssize); -#else - Safefree (stack->sptr); + if (cctx->flags & CC_MAPPED) + munmap (cctx->sptr, cctx->ssize); + else #endif + Safefree (cctx->sptr); + } - Safefree (stack); + Safefree (cctx); } -static coro_stack *stack_first; +/* wether this cctx should be destructed */ +#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE)) -static coro_stack * -stack_get () +static coro_cctx * +cctx_get (pTHX) { - coro_stack *stack; - - if (stack_first) + while (expect_true (cctx_first)) { - stack = stack_first; - stack_first = stack->next; + coro_cctx *cctx = cctx_first; + cctx_first = cctx->next; + --cctx_idle; + + if (expect_true (!CCTX_EXPIRED (cctx))) + return cctx; + + cctx_destroy (cctx); } - else - { - stack = stack_new (); - PL_op = PL_op->op_next; - } - return stack; + return cctx_new_run (); } static void -stack_put (coro_stack *stack) +cctx_put (coro_cctx *cctx) { - stack->next = stack_first; - stack_first = stack; + assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr)); + + /* free another cctx if overlimit */ + if (expect_false (cctx_idle >= cctx_max_idle)) + { + coro_cctx *first = cctx_first; + cctx_first = first->next; + --cctx_idle; + + cctx_destroy (first); + } + + ++cctx_idle; + cctx->next = cctx_first; + cctx_first = cctx; } -/* never call directly, always through the coro_state_transfer global variable */ +/** coroutine switching *****************************************************/ + static void -transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) +transfer_check (pTHX_ struct coro *prev, struct coro *next) { - dSTACKLEVEL; + /* TODO: throwing up here is considered harmful */ - /* sometimes transfer is only called to set idle_sp */ - if (!prev->stack->idle_sp) - prev->stack->idle_sp = stacklevel; + if (expect_true (prev != next)) + { + if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) + croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,"); + + if (expect_false (next->flags & CF_RUNNING)) + croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,"); - LOCK; + if (expect_false (next->flags & CF_DESTROYED)) + croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,"); - if (prev != next) +#if !PERL_VERSION_ATLEAST (5,10,0) + if (expect_false (PL_lex_state != LEX_NOTPARSING)) + croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); +#endif + } +} + +/* always use the TRANSFER macro */ +static void NOINLINE /* noinline so we have a fixed stackframe */ +transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) +{ + dSTACKLEVEL; + + /* sometimes transfer is only called to set idle_sp */ + if (expect_false (!next)) { - coro_stack *prev_stack = prev->stack; + ((coro_cctx *)prev)->idle_sp = (void *)stacklevel; + assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ + } + else if (expect_true (prev != next)) + { + coro_cctx *prev__cctx; - /* possibly "free" the stack */ - if (0 && prev_stack->idle_sp == stacklevel) + if (expect_false (prev->flags & CF_NEW)) { - stack_put (prev_stack); - prev->stack = 0; + /* create a new empty/source context */ + prev->cctx = cctx_new_empty (); + prev->flags &= ~CF_NEW; + prev->flags |= CF_RUNNING; } - if (next->mainstack) + prev->flags &= ~CF_RUNNING; + next->flags |= CF_RUNNING; + + /* first get rid of the old state */ + save_perl (aTHX_ prev); + + if (expect_false (next->flags & CF_NEW)) { - /* coroutine already started */ - SAVE (prev, flags); - LOAD (next); + /* need to start coroutine */ + next->flags &= ~CF_NEW; + /* setup coroutine call */ + coro_setup (aTHX_ next); } else + load_perl (aTHX_ next); + + prev__cctx = prev->cctx; + + /* possibly untie and reuse the cctx */ + if (expect_true ( + prev__cctx->idle_sp == (void *)stacklevel + && !(prev__cctx->flags & CC_TRACE) + && !force_cctx + )) { - /* need to start coroutine */ - /* first get rid of the old state */ - SAVE (prev, -1); - /* setup coroutine call */ - setup_coro (next); - /* need to change stack from main_stack to real one */ - next->stack = 0; + /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ + assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); + + prev->cctx = 0; + + /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ + /* without this the next cctx_get might destroy the prev__cctx while still in use */ + if (expect_false (CCTX_EXPIRED (prev__cctx))) + if (!next->cctx) + next->cctx = cctx_get (aTHX); + + cctx_put (prev__cctx); } - if (!next->stack) - next->stack = stack_get (); + ++next->usecount; - if (prev_stack != next->stack) - coro_transfer (&prev_stack->cctx, &next->stack->cctx); - } + if (expect_true (!next->cctx)) + next->cctx = cctx_get (aTHX); - transfer_tail (); + if (expect_false (prev__cctx != next->cctx)) + { + prev__cctx->top_env = PL_top_env; + PL_top_env = next->cctx->top_env; + coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); + } + + transfer_tail (aTHX); + } } -/* use this function pointer to call the above function */ -/* this is done to increase chances of the compiler not inlining the call */ -void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; +#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) +#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) -static void -coro_state_destroy (struct coro *coro) +/** high level stuff ********************************************************/ + +static int +coro_state_destroy (pTHX_ struct coro *coro) { - if (coro->refcnt--) - return; + if (coro->flags & CF_DESTROYED) + return 0; + + if (coro->on_destroy) + coro->on_destroy (aTHX_ coro); + + coro->flags |= CF_DESTROYED; + + if (coro->flags & CF_READY) + { + /* reduce nready, as destroying a ready coro effectively unreadies it */ + /* alternative: look through all ready queues and remove the coro */ + --coro_nready; + } + else + coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ if (coro->mainstack && coro->mainstack != main_mainstack) { struct coro temp; - SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); - LOAD (aTHX_ coro); + assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING))); - destroy_stacks (aTHX); + save_perl (aTHX_ &temp); + load_perl (aTHX_ coro); - LOAD ((&temp)); /* this will get rid of defsv etc.. */ + coro_destruct (aTHX_ coro); - coro->mainstack = 0; + load_perl (aTHX_ &temp); + + coro->slot = 0; } - stack_free (coro->stack); + cctx_destroy (coro->cctx); SvREFCNT_dec (coro->args); - Safefree (coro); + + if (coro->next) coro->next->prev = coro->prev; + if (coro->prev) coro->prev->next = coro->next; + if (coro == coro_first) coro_first = coro->next; + + return 1; } static int -coro_state_clear (SV *sv, MAGIC *mg) +coro_state_free (pTHX_ SV *sv, MAGIC *mg) { struct coro *coro = (struct coro *)mg->mg_ptr; mg->mg_ptr = 0; - coro_state_destroy (coro); + coro->hv = 0; + + if (--coro->refcnt < 0) + { + coro_state_destroy (aTHX_ coro); + Safefree (coro); + } return 0; } static int -coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) +coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) { struct coro *coro = (struct coro *)mg->mg_ptr; @@ -778,191 +1467,880 @@ return 0; } -static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; +static MGVTBL coro_state_vtbl = { + 0, 0, 0, 0, + coro_state_free, + 0, +#ifdef MGf_DUP + coro_state_dup, +#else +# define MGf_DUP 0 +#endif +}; -static struct coro * -SvSTATE (SV *coro) +static void +prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv) { - HV *stash; - MAGIC *mg; + ta->prev = SvSTATE (prev_sv); + ta->next = SvSTATE (next_sv); + TRANSFER_CHECK (*ta); +} - if (SvROK (coro)) - coro = SvRV (coro); +static void +api_transfer (pTHX_ SV *prev_sv, SV *next_sv) +{ + struct coro_transfer_args ta; - stash = SvSTASH (coro); - if (stash != coro_stash && stash != coro_state_stash) + prepare_transfer (aTHX_ &ta, prev_sv, next_sv); + TRANSFER (ta, 1); +} + +/** Coro ********************************************************************/ + +INLINE void +coro_enq (pTHX_ struct coro *coro) +{ + av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv)); +} + +INLINE SV * +coro_deq (pTHX) +{ + int prio; + + for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) + if (AvFILLp (coro_ready [prio]) >= 0) + return av_shift (coro_ready [prio]); + + return 0; +} + +static int +api_ready (pTHX_ SV *coro_sv) +{ + struct coro *coro; + SV *sv_hook; + void (*xs_hook)(void); + + if (SvROK (coro_sv)) + coro_sv = SvRV (coro_sv); + + coro = SvSTATE (coro_sv); + + if (coro->flags & CF_READY) + return 0; + + coro->flags |= CF_READY; + + sv_hook = coro_nready ? 0 : coro_readyhook; + xs_hook = coro_nready ? 0 : coroapi.readyhook; + + coro_enq (aTHX_ coro); + ++coro_nready; + + if (sv_hook) { - /* very slow, but rare, check */ - if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) - croak ("Coro::State object required"); + dSP; + + ENTER; + SAVETMPS; + + PUSHMARK (SP); + PUTBACK; + call_sv (sv_hook, G_VOID | G_DISCARD); + + FREETMPS; + LEAVE; } - mg = SvMAGIC (coro); - assert (mg->mg_type == PERL_MAGIC_ext); - return (struct coro *)mg->mg_ptr; + if (xs_hook) + xs_hook (); + + return 1; +} + +static int +api_is_ready (pTHX_ SV *coro_sv) +{ + return !!(SvSTATE (coro_sv)->flags & CF_READY); +} + +INLINE void +prepare_schedule (pTHX_ struct coro_transfer_args *ta) +{ + SV *prev_sv, *next_sv; + + for (;;) + { + next_sv = coro_deq (aTHX); + + /* nothing to schedule: call the idle handler */ + if (expect_false (!next_sv)) + { + dSP; + + ENTER; + SAVETMPS; + + PUSHMARK (SP); + PUTBACK; + call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD); + + FREETMPS; + LEAVE; + continue; + } + + ta->next = SvSTATE_hv (next_sv); + + /* cannot transfer to destroyed coros, skip and look for next */ + if (expect_false (ta->next->flags & CF_DESTROYED)) + { + SvREFCNT_dec (next_sv); + /* coro_nready has already been taken care of by destroy */ + continue; + } + + --coro_nready; + break; + } + + /* free this only after the transfer */ + prev_sv = SvRV (coro_current); + ta->prev = SvSTATE_hv (prev_sv); + TRANSFER_CHECK (*ta); + assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); + ta->next->flags &= ~CF_READY; + SvRV_set (coro_current, next_sv); + + free_coro_mortal (aTHX); + coro_mortal = prev_sv; +} + +INLINE void +prepare_cede (pTHX_ struct coro_transfer_args *ta) +{ + api_ready (aTHX_ coro_current); + prepare_schedule (aTHX_ ta); +} + +INLINE void +prepare_cede_notself (pTHX_ struct coro_transfer_args *ta) +{ + SV *prev = SvRV (coro_current); + + if (coro_nready) + { + prepare_schedule (aTHX_ ta); + api_ready (aTHX_ prev); + } + else + prepare_nop (aTHX_ ta); } static void -api_transfer (pTHX_ SV *prev, SV *next, int flags) +api_schedule (pTHX) { - coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); + struct coro_transfer_args ta; + + prepare_schedule (aTHX_ &ta); + TRANSFER (ta, 1); } -/** Coro ********************************************************************/ +static int +api_cede (pTHX) +{ + struct coro_transfer_args ta; -#define PRIO_MAX 3 -#define PRIO_HIGH 1 -#define PRIO_NORMAL 0 -#define PRIO_LOW -1 -#define PRIO_IDLE -3 -#define PRIO_MIN -4 + prepare_cede (aTHX_ &ta); -/* for Coro.pm */ -static GV *coro_current, *coro_idle; -static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; -static int coro_nready; + if (expect_true (ta.prev != ta.next)) + { + TRANSFER (ta, 1); + return 1; + } + else + return 0; +} + +static int +api_cede_notself (pTHX) +{ + if (coro_nready) + { + struct coro_transfer_args ta; + + prepare_cede_notself (aTHX_ &ta); + TRANSFER (ta, 1); + return 1; + } + else + return 0; +} static void -coro_enq (pTHX_ SV *sv) +api_trace (pTHX_ SV *coro_sv, int flags) { - int prio; + struct coro *coro = SvSTATE (coro_sv); - if (SvTYPE (sv) != SVt_PVHV) - croak ("Coro::ready tried to enqueue something that is not a coroutine"); + if (flags & CC_TRACE) + { + if (!coro->cctx) + coro->cctx = cctx_new_run (); + else if (!(coro->cctx->flags & CC_TRACE)) + croak ("cannot enable tracing on coroutine with custom stack,"); - prio = SvSTATE (sv)->prio; + coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); + } + else if (coro->cctx && coro->cctx->flags & CC_TRACE) + { + coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); - av_push (coro_ready [prio - PRIO_MIN], sv); - coro_nready++; + if (coro->flags & CF_RUNNING) + PL_runops = RUNOPS_DEFAULT; + else + coro->slot->runops = RUNOPS_DEFAULT; + } } -static SV * -coro_deq (pTHX_ int min_prio) +/*****************************************************************************/ +/* schedule-like-function opcode (SLF) */ + +static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */ +static const CV *slf_cv; +static SV **slf_argv; +static int slf_argc, slf_arga; /* count, allocated */ +static I32 slf_ax; /* top of stack, for restore */ + +/* this restores the stack in the case we patched the entersub, to */ +/* recreate the stack frame as perl will on following calls */ +/* since entersub cleared the stack */ +static OP * +pp_restore (pTHX) { - int prio = PRIO_MAX - PRIO_MIN; + int i; + SV **SP = PL_stack_base + slf_ax; - min_prio -= PRIO_MIN; - if (min_prio < 0) - min_prio = 0; + PUSHMARK (SP); - for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) - if (AvFILLp (coro_ready [prio]) >= 0) - { - coro_nready--; - return av_shift (coro_ready [prio]); - } + EXTEND (SP, slf_argc + 1); - return 0; + for (i = 0; i < slf_argc; ++i) + PUSHs (sv_2mortal (slf_argv [i])); + + PUSHs ((SV *)CvGV (slf_cv)); + + RETURNOP (slf_restore.op_first); } static void -api_ready (SV *coro) +slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta) { - dTHX; + SV **arg = (SV **)slf_frame.data; - if (SvROK (coro)) - coro = SvRV (coro); + prepare_transfer (aTHX_ ta, arg [0], arg [1]); +} + +static void +slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + if (items != 2) + croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items); - LOCK; - coro_enq (aTHX_ SvREFCNT_inc (coro)); - UNLOCK; + frame->prepare = slf_prepare_transfer; + frame->check = slf_check_nop; + frame->data = (void *)arg; /* let's hope it will stay valid */ } static void -api_schedule (void) +slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) { - dTHX; + frame->prepare = prepare_schedule; + frame->check = slf_check_nop; +} - SV *prev, *next; - SV *current = GvSV (coro_current); +static void +slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + frame->prepare = prepare_cede; + frame->check = slf_check_nop; +} - for (;;) +static void +slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + frame->prepare = prepare_cede_notself; + frame->check = slf_check_nop; +} + +/* + * these not obviously related functions are all rolled into one + * function to increase chances that they all will call transfer with the same + * stack offset + * SLF stands for "schedule-like-function". + */ +static OP * +pp_slf (pTHX) +{ + I32 checkmark; /* mark SP to see how many elements check has pushed */ + + /* set up the slf frame, unless it has already been set-up */ + /* the latter happens when a new coro has been started */ + /* or when a new cctx was attached to an existing coroutine */ + if (expect_true (!slf_frame.prepare)) + { + /* first iteration */ + dSP; + SV **arg = PL_stack_base + TOPMARK + 1; + int items = SP - arg; /* args without function object */ + SV *gv = *sp; + + /* do a quick consistency check on the "function" object, and if it isn't */ + /* for us, divert to the real entersub */ + if (SvTYPE (gv) != SVt_PVGV + || !GvCV (gv) + || !(CvFLAGS (GvCV (gv)) & CVf_SLF)) + return PL_ppaddr[OP_ENTERSUB](aTHX); + + if (!(PL_op->op_flags & OPf_STACKED)) + { + /* ampersand-form of call, use @_ instead of stack */ + AV *av = GvAV (PL_defgv); + arg = AvARRAY (av); + items = AvFILLp (av) + 1; + } + + /* now call the init function, which needs to set up slf_frame */ + ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) + (aTHX_ &slf_frame, GvCV (gv), arg, items); + + /* pop args */ + SP = PL_stack_base + POPMARK; + + PUTBACK; + } + + /* now that we have a slf_frame, interpret it! */ + /* we use a callback system not to make the code needlessly */ + /* complicated, but so we can run multiple perl coros from one cctx */ + + do { - LOCK; + struct coro_transfer_args ta; - next = coro_deq (aTHX_ PRIO_MIN); + slf_frame.prepare (aTHX_ &ta); + TRANSFER (ta, 0); - if (next) - break; + checkmark = PL_stack_sp - PL_stack_base; + } + while (slf_frame.check (aTHX_ &slf_frame)); - UNLOCK; + slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */ - { - dSP; + /* return value handling - mostly like entersub */ + /* make sure we put something on the stack in scalar context */ + if (GIMME_V == G_SCALAR) + { + dSP; + SV **bot = PL_stack_base + checkmark; - ENTER; - SAVETMPS; + if (sp == bot) /* too few, push undef */ + bot [1] = &PL_sv_undef; + else if (sp != bot + 1) /* too many, take last one */ + bot [1] = *sp; - PUSHMARK (SP); - PUTBACK; - call_sv (GvSV (coro_idle), G_DISCARD); + SP = bot + 1; - FREETMPS; - LEAVE; - } + PUTBACK; } - prev = SvRV (current); - SvRV (current) = next; + /* exception handling */ + if (expect_false (coro_throw)) + { + SV *exception = sv_2mortal (coro_throw); - /* free this only after the transfer */ - coro_mortal = prev; + coro_throw = 0; + sv_setsv (ERRSV, exception); + croak (0); + } + + return NORMAL; +} + +static void +api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax) +{ + int i; + SV **arg = PL_stack_base + ax; + int items = PL_stack_sp - arg + 1; + + assert (("FATAL: SLF call with illegal CV value", !CvANON (cv))); + + if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB] + && PL_op->op_ppaddr != pp_slf) + croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught"); + + CvFLAGS (cv) |= CVf_SLF; + CvXSUBANY (cv).any_ptr = (void *)init_cb; + slf_cv = cv; + + /* we patch the op, and then re-run the whole call */ + /* we have to put the same argument on the stack for this to work */ + /* and this will be done by pp_restore */ + slf_restore.op_next = (OP *)&slf_restore; + slf_restore.op_type = OP_CUSTOM; + slf_restore.op_ppaddr = pp_restore; + slf_restore.op_first = PL_op; + + slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */ + + if (PL_op->op_flags & OPf_STACKED) + { + if (items > slf_arga) + { + slf_arga = items; + free (slf_argv); + slf_argv = malloc (slf_arga * sizeof (SV *)); + } - UNLOCK; + slf_argc = items; - coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL); + for (i = 0; i < items; ++i) + slf_argv [i] = SvREFCNT_inc (arg [i]); + } + else + slf_argc = 0; + + PL_op->op_ppaddr = pp_slf; + PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */ + + PL_op = (OP *)&slf_restore; } -static int coro_cede_self; +/*****************************************************************************/ +/* PerlIO::cede */ + +typedef struct +{ + PerlIOBuf base; + NV next, every; +} PerlIOCede; + +static IV +PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab) +{ + PerlIOCede *self = PerlIOSelf (f, PerlIOCede); + + self->every = SvCUR (arg) ? SvNV (arg) : 0.01; + self->next = nvtime () + self->every; + + return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab); +} + +static SV * +PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags) +{ + PerlIOCede *self = PerlIOSelf (f, PerlIOCede); + + return newSVnv (self->every); +} + +static IV +PerlIOCede_flush (pTHX_ PerlIO *f) +{ + PerlIOCede *self = PerlIOSelf (f, PerlIOCede); + double now = nvtime (); + + if (now >= self->next) + { + api_cede (aTHX); + self->next = now + self->every; + } + + return PerlIOBuf_flush (aTHX_ f); +} + +static PerlIO_funcs PerlIO_cede = +{ + sizeof(PerlIO_funcs), + "cede", + sizeof(PerlIOCede), + PERLIO_K_DESTRUCT | PERLIO_K_RAW, + PerlIOCede_pushed, + PerlIOBuf_popped, + PerlIOBuf_open, + PerlIOBase_binmode, + PerlIOCede_getarg, + PerlIOBase_fileno, + PerlIOBuf_dup, + PerlIOBuf_read, + PerlIOBuf_unread, + PerlIOBuf_write, + PerlIOBuf_seek, + PerlIOBuf_tell, + PerlIOBuf_close, + PerlIOCede_flush, + PerlIOBuf_fill, + PerlIOBase_eof, + PerlIOBase_error, + PerlIOBase_clearerr, + PerlIOBase_setlinebuf, + PerlIOBuf_get_base, + PerlIOBuf_bufsiz, + PerlIOBuf_get_ptr, + PerlIOBuf_get_cnt, + PerlIOBuf_set_ptrcnt, +}; + +/*****************************************************************************/ +/* Coro::Semaphore */ + +static void +coro_semaphore_adjust (pTHX_ AV *av, IV adjust) +{ + SV *count_sv = AvARRAY (av)[0]; + IV count = SvIVX (count_sv); + + count += adjust; + SvIVX (count_sv) = count; + + /* now wake up as many waiters as are expected to lock */ + while (count > 0 && AvFILLp (av) > 0) + { + SV *cb; + + /* swap first two elements so we can shift a waiter */ + AvARRAY (av)[0] = AvARRAY (av)[1]; + AvARRAY (av)[1] = count_sv; + cb = av_shift (av); + + if (SvOBJECT (cb)) + api_ready (aTHX_ cb); + else + croak ("callbacks not yet supported"); + + SvREFCNT_dec (cb); + + --count; + } +} static void -api_cede (void) +coro_semaphore_on_destroy (pTHX_ struct coro *coro) { - dTHX; - SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current))); + /* call $sem->adjust (0) to possibly wake up some other waiters */ + coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0); +} + +static int +slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) +{ + AV *av = (AV *)frame->data; + SV *count_sv = AvARRAY (av)[0]; + + if (SvIVX (count_sv) > 0) + { + SvSTATE_current->on_destroy = 0; + SvIVX (count_sv) = SvIVX (count_sv) - 1; + return 0; + } + else + { + int i; + /* if we were woken up but can't down, we look through the whole */ + /* waiters list and only add us if we aren't in there already */ + /* this avoids some degenerate memory usage cases */ + + for (i = 1; i <= AvFILLp (av); ++i) + if (AvARRAY (av)[i] == SvRV (coro_current)) + return 1; - LOCK; + av_push (av, SvREFCNT_inc (SvRV (coro_current))); + return 1; + } +} - if (coro_cede_self) +static void +slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + AV *av = (AV *)SvRV (arg [0]); + + if (SvIVX (AvARRAY (av)[0]) > 0) { - AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN]; - av_unshift (runqueue, 1); - av_store (runqueue, 0, current); - coro_nready++; - coro_cede_self = 0; + frame->data = (void *)av; + frame->prepare = prepare_nop; + SvSTATE_current->on_destroy = coro_semaphore_on_destroy; } else - coro_enq (aTHX_ current); + { + av_push (av, SvREFCNT_inc (SvRV (coro_current))); + + frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); + frame->prepare = prepare_schedule; + + /* to avoid race conditions when a woken-up coro gets terminated */ + /* we arrange for a temporary on_destroy that calls adjust (0) */ + assert (!SvSTATE_current->on_destroy);//D + SvSTATE_current->on_destroy = coro_semaphore_on_destroy; + } + + frame->check = slf_check_semaphore_down; + +} + +/*****************************************************************************/ +/* gensub: simple closure generation utility */ + +#define GENSUB_ARG CvXSUBANY (cv).any_ptr + +/* create a closure from XS, returns a code reference */ +/* the arg can be accessed via GENSUB_ARG from the callback */ +/* the callback must use dXSARGS/XSRETURN */ +static SV * +gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) +{ + CV *cv = (CV *)newSV (0); - UNLOCK; + sv_upgrade ((SV *)cv, SVt_PVCV); - api_schedule (); + CvANON_on (cv); + CvISXSUB_on (cv); + CvXSUB (cv) = xsub; + GENSUB_ARG = arg; + + return newRV_noinc ((SV *)cv); } -MODULE = Coro::State PACKAGE = Coro::State +/*****************************************************************************/ +/* Coro::AIO */ + +#define CORO_MAGIC_type_aio PERL_MAGIC_ext + +/* helper storage struct */ +struct io_state +{ + int errorno; + I32 laststype; /* U16 in 5.10.0 */ + int laststatval; + Stat_t statcache; +}; + +static void +coro_aio_callback (pTHX_ CV *cv) +{ + dXSARGS; + AV *state = (AV *)GENSUB_ARG; + SV *coro = av_pop (state); + SV *data_sv = newSV (sizeof (struct io_state)); + + av_extend (state, items); + + sv_upgrade (data_sv, SVt_PV); + SvCUR_set (data_sv, sizeof (struct io_state)); + SvPOK_only (data_sv); + + { + struct io_state *data = (struct io_state *)SvPVX (data_sv); + + data->errorno = errno; + data->laststype = PL_laststype; + data->laststatval = PL_laststatval; + data->statcache = PL_statcache; + } + + /* now build the result vector out of all the parameters and the data_sv */ + { + int i; + + for (i = 0; i < items; ++i) + av_push (state, SvREFCNT_inc_NN (ST (i))); + } + + av_push (state, data_sv); + + api_ready (aTHX_ coro); + SvREFCNT_dec (coro); + SvREFCNT_dec ((AV *)state); +} + +static int +slf_check_aio_req (pTHX_ struct CoroSLF *frame) +{ + AV *state = (AV *)frame->data; + + /* one element that is an RV? repeat! */ + if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0])) + return 1; + + /* restore status */ + { + SV *data_sv = av_pop (state); + struct io_state *data = (struct io_state *)SvPVX (data_sv); + + errno = data->errorno; + PL_laststype = data->laststype; + PL_laststatval = data->laststatval; + PL_statcache = data->statcache; + + SvREFCNT_dec (data_sv); + } + + /* push result values */ + { + dSP; + int i; + + EXTEND (SP, AvFILLp (state) + 1); + for (i = 0; i <= AvFILLp (state); ++i) + PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i]))); + + PUTBACK; + } + + return 0; +} + +static void +slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + AV *state = (AV *)sv_2mortal ((SV *)newAV ()); + SV *coro_hv = SvRV (coro_current); + struct coro *coro = SvSTATE_hv (coro_hv); + + /* put our coroutine id on the state arg */ + av_push (state, SvREFCNT_inc_NN (coro_hv)); + + /* first see whether we have a non-zero priority and set it as AIO prio */ + if (coro->prio) + { + dSP; + + static SV *prio_cv; + static SV *prio_sv; + + if (expect_false (!prio_cv)) + { + prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0); + prio_sv = newSViv (0); + } + + PUSHMARK (SP); + sv_setiv (prio_sv, coro->prio); + XPUSHs (prio_sv); + + PUTBACK; + call_sv (prio_cv, G_VOID | G_DISCARD); + } + + /* now call the original request */ + { + dSP; + CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj; + int i; + + PUSHMARK (SP); + + /* first push all args to the stack */ + EXTEND (SP, items + 1); + + for (i = 0; i < items; ++i) + PUSHs (arg [i]); + + /* now push the callback closure */ + PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state)))); + + /* now call the AIO function - we assume our request is uncancelable */ + PUTBACK; + call_sv ((SV *)req, G_VOID | G_DISCARD); + } + + /* now that the requets is going, we loop toll we have a result */ + frame->data = (void *)state; + frame->prepare = prepare_schedule; + frame->check = slf_check_aio_req; +} + +static void +coro_aio_req_xs (pTHX_ CV *cv) +{ + dXSARGS; + + CORO_EXECUTE_SLF_XS (slf_init_aio_req); + + XSRETURN_EMPTY; +} + +/*****************************************************************************/ + +MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ PROTOTYPES: DISABLE BOOT: { #ifdef USE_ITHREADS - MUTEX_INIT (&coro_mutex); +# if CORO_PTHREAD + coro_thx = PERL_GET_CONTEXT; +# endif #endif BOOT_PAGESIZE; + irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); + stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); + + orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; + orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; + orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr; + + hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); + rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); + rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); + coro_state_stash = gv_stashpv ("Coro::State", TRUE); - newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); - newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); - newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); + newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); + newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); + newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); + newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); main_mainstack = PL_mainstack; + main_top_env = PL_top_env; + + while (main_top_env->je_prev) + main_top_env = main_top_env->je_prev; + + { + SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf))); + + if (!PL_custom_op_names) PL_custom_op_names = newHV (); + hv_store_ent (PL_custom_op_names, slf, + newSVpv ("coro_slf", 0), 0); + + if (!PL_custom_op_descs) PL_custom_op_descs = newHV (); + hv_store_ent (PL_custom_op_descs, slf, + newSVpv ("coro schedule like function", 0), 0); + } + + coroapi.ver = CORO_API_VERSION; + coroapi.rev = CORO_API_REVISION; + + coroapi.transfer = api_transfer; + + coroapi.sv_state = SvSTATE_; + coroapi.execute_slf = api_execute_slf; + coroapi.prepare_nop = prepare_nop; + coroapi.prepare_schedule = prepare_schedule; + coroapi.prepare_cede = prepare_cede; + coroapi.prepare_cede_notself = prepare_cede_notself; + + { + SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); - coroapi.ver = CORO_API_VERSION; - coroapi.transfer = api_transfer; + if (!svp) croak ("Time::HiRes is required"); + if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); - Newz (0, main_stack, 1, coro_stack); - main_stack->idle_sp = (void *)-1; + nvtime = INT2PTR (double (*)(), SvIV (*svp)); + } assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); } @@ -972,112 +2350,226 @@ CODE: { struct coro *coro; + MAGIC *mg; HV *hv; int i; Newz (0, coro, 1, struct coro); - coro->args = newAV (); + coro->args = newAV (); + coro->flags = CF_NEW; - hv = newHV (); - sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; + if (coro_first) coro_first->prev = coro; + coro->next = coro_first; + coro_first = coro; + + coro->hv = hv = newHV (); + mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); + mg->mg_flags |= MGf_DUP; RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); - av_push (coro->args, newSVsv (RETVAL)); + av_extend (coro->args, items - 1); for (i = 1; i < items; i++) av_push (coro->args, newSVsv (ST (i))); - - coro->stack = main_stack; - /*coro->mainstack = 0; *//*actual work is done inside transfer */ - /*coro->stack = 0;*/ } OUTPUT: RETVAL void -transfer (prev, next, flags) - SV *prev - SV *next - int flags - CODE: - PUTBACK; - coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); - SPAGAIN; +transfer (...) + PROTOTYPE: $$ + CODE: + CORO_EXECUTE_SLF_XS (slf_init_transfer); + +bool +_destroy (SV *coro_sv) + CODE: + RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); + OUTPUT: + RETVAL + +void +_exit (int code) + PROTOTYPE: $ + CODE: + _exit (code); int -prio (Coro::State coro, int newprio = 0) - ALIAS: - nice = 1 - CODE: +cctx_stacksize (int new_stacksize = 0) + PROTOTYPE: ;$ + CODE: + RETVAL = cctx_stacksize; + if (new_stacksize) + { + cctx_stacksize = new_stacksize; + ++cctx_gen; + } + OUTPUT: + RETVAL + +int +cctx_max_idle (int max_idle = 0) + PROTOTYPE: ;$ + CODE: + RETVAL = cctx_max_idle; + if (max_idle > 1) + cctx_max_idle = max_idle; + OUTPUT: + RETVAL + +int +cctx_count () + PROTOTYPE: + CODE: + RETVAL = cctx_count; + OUTPUT: + RETVAL + +int +cctx_idle () + PROTOTYPE: + CODE: + RETVAL = cctx_idle; + OUTPUT: + RETVAL + +void +list () + PROTOTYPE: + PPCODE: { - RETVAL = coro->prio; + struct coro *coro; + for (coro = coro_first; coro; coro = coro->next) + if (coro->hv) + XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); +} - if (items > 1) +void +call (Coro::State coro, SV *coderef) + ALIAS: + eval = 1 + CODE: +{ + if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) { - if (ix) - newprio += coro->prio; + struct coro temp; - if (newprio < PRIO_MIN) newprio = PRIO_MIN; - if (newprio > PRIO_MAX) newprio = PRIO_MAX; + if (!(coro->flags & CF_RUNNING)) + { + PUTBACK; + save_perl (aTHX_ &temp); + load_perl (aTHX_ coro); + } - coro->prio = newprio; + { + dSP; + ENTER; + SAVETMPS; + PUTBACK; + PUSHSTACK; + PUSHMARK (SP); + + if (ix) + eval_sv (coderef, 0); + else + call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + + POPSTACK; + SPAGAIN; + FREETMPS; + LEAVE; + PUTBACK; + } + + if (!(coro->flags & CF_RUNNING)) + { + save_perl (aTHX_ coro); + load_perl (aTHX_ &temp); + SPAGAIN; + } } } -void -_clear_idle_sp (Coro::State self) +SV * +is_ready (Coro::State coro) + PROTOTYPE: $ + ALIAS: + is_ready = CF_READY + is_running = CF_RUNNING + is_new = CF_NEW + is_destroyed = CF_DESTROYED CODE: - self->stack->idle_sp = 0; + RETVAL = boolSV (coro->flags & ix); + OUTPUT: + RETVAL void -_clone_state_from (SV *dst, SV *src) - CODE: +throw (Coro::State self, SV *throw = &PL_sv_undef) + PROTOTYPE: $;$ + CODE: { - struct coro *coro_src = SvSTATE (src); - - sv_unmagic (SvRV (dst), PERL_MAGIC_ext); - - ++coro_src->refcnt; - sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; + struct coro *current = SvSTATE_current; + SV **throwp = self == current ? &coro_throw : &self->throw; + SvREFCNT_dec (*throwp); + *throwp = SvOK (throw) ? newSVsv (throw) : 0; } void -_exit (code) - int code +api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) + PROTOTYPE: $;$ + C_ARGS: aTHX_ coro, flags + +SV * +has_cctx (Coro::State coro) PROTOTYPE: $ CODE: - _exit (code); + RETVAL = boolSV (!!coro->cctx); + OUTPUT: + RETVAL -MODULE = Coro::State PACKAGE = Coro::Cont +int +is_traced (Coro::State coro) + PROTOTYPE: $ + CODE: + RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; + OUTPUT: + RETVAL + +UV +rss (Coro::State coro) + PROTOTYPE: $ + ALIAS: + usecount = 1 + CODE: + switch (ix) + { + case 0: RETVAL = coro_rss (aTHX_ coro); break; + case 1: RETVAL = coro->usecount; break; + } + OUTPUT: + RETVAL void -yield (...) - PROTOTYPE: @ +force_cctx () + PROTOTYPE: + CODE: + SvSTATE_current->cctx->idle_sp = 0; + +void +swap_defsv (Coro::State self) + PROTOTYPE: $ + ALIAS: + swap_defav = 1 CODE: -{ - SV *yieldstack; - SV *sv; - AV *defav = GvAV (PL_defgv); - struct coro *prev, *next; + if (!self->slot) + croak ("cannot swap state with coroutine that has no saved state,"); + else + { + SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); + SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; - yieldstack = *hv_fetch ( - (HV *)SvRV (GvSV (coro_current)), - "yieldstack", sizeof ("yieldstack") - 1, - 0 - ); - - /* set up @_ -- ugly */ - av_clear (defav); - av_fill (defav, items - 1); - while (items--) - av_store (defav, items, SvREFCNT_inc (ST(items))); - - sv = av_pop ((AV *)SvRV (yieldstack)); - prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0)); - next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0)); - SvREFCNT_dec (sv); + SV *tmp = *src; *src = *dst; *dst = tmp; + } - coro_state_transfer (aTHX_ prev, next, 0); -} MODULE = Coro::State PACKAGE = Coro @@ -1085,7 +2577,14 @@ { int i; - coro_stash = gv_stashpv ("Coro", TRUE); + av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); + sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); + sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); + + coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); + SvREADONLY_on (coro_current); + + coro_stash = gv_stashpv ("Coro", TRUE); newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); @@ -1094,20 +2593,19 @@ newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); - coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); - coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); - for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) coro_ready[i] = newAV (); { - SV *sv = perl_get_sv("Coro::API", 1); + SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); - coroapi.schedule = api_schedule; - coroapi.cede = api_cede; - coroapi.ready = api_ready; - coroapi.nready = &coro_nready; - coroapi.current = coro_current; + coroapi.schedule = api_schedule; + coroapi.cede = api_cede; + coroapi.cede_notself = api_cede_notself; + coroapi.ready = api_ready; + coroapi.is_ready = api_is_ready; + coroapi.nready = coro_nready; + coroapi.current = coro_current; GCoroAPI = &coroapi; sv_setiv (sv, (IV)&coroapi); @@ -1116,10 +2614,64 @@ } void +schedule (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_schedule); + +void +cede (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_cede); + +void +cede_notself (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_cede_notself); + +void +_set_current (SV *current) + PROTOTYPE: $ + CODE: + SvREFCNT_dec (SvRV (coro_current)); + SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current))); + +void +_set_readyhook (SV *hook) + PROTOTYPE: $ + CODE: + SvREFCNT_dec (coro_readyhook); + coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; + +int +prio (Coro::State coro, int newprio = 0) + PROTOTYPE: $;$ + ALIAS: + nice = 1 + CODE: +{ + RETVAL = coro->prio; + + if (items > 1) + { + if (ix) + newprio = coro->prio - newprio; + + if (newprio < PRIO_MIN) newprio = PRIO_MIN; + if (newprio > PRIO_MAX) newprio = PRIO_MAX; + + coro->prio = newprio; + } +} + OUTPUT: + RETVAL + +SV * ready (SV *self) PROTOTYPE: $ CODE: - api_ready (self); + RETVAL = boolSV (api_ready (aTHX_ self)); + OUTPUT: + RETVAL int nready (...) @@ -1129,60 +2681,204 @@ OUTPUT: RETVAL +# for async_pool speedup void -schedule (...) - PROTOTYPE: +_pool_1 (SV *cb) CODE: - api_schedule (); +{ + HV *hv = (HV *)SvRV (coro_current); + struct coro *coro = SvSTATE_hv ((SV *)hv); + AV *defav = GvAV (PL_defgv); + SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); + AV *invoke_av; + int i, len; -void -_set_cede_self () - CODE: - coro_cede_self = 1; + if (!invoke) + { + SV *old = PL_diehook; + PL_diehook = 0; + SvREFCNT_dec (old); + croak ("\3async_pool terminate\2\n"); + } + + SvREFCNT_dec (coro->saved_deffh); + coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv); + + hv_store (hv, "desc", sizeof ("desc") - 1, + newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); + + invoke_av = (AV *)SvRV (invoke); + len = av_len (invoke_av); + + sv_setsv (cb, AvARRAY (invoke_av)[0]); + + if (len > 0) + { + av_fill (defav, len - 1); + for (i = 0; i < len; ++i) + av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); + } +} void -cede (...) - PROTOTYPE: +_pool_2 (SV *cb) CODE: - api_cede (); +{ + HV *hv = (HV *)SvRV (coro_current); + struct coro *coro = SvSTATE_hv ((SV *)hv); -MODULE = Coro::State PACKAGE = Coro::AIO + sv_setsv (cb, &PL_sv_undef); + + SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; + coro->saved_deffh = 0; + + if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss) + || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) + { + SV *old = PL_diehook; + PL_diehook = 0; + SvREFCNT_dec (old); + croak ("\3async_pool terminate\2\n"); + } + + av_clear (GvAV (PL_defgv)); + hv_store (hv, "desc", sizeof ("desc") - 1, + newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); + + coro->prio = 0; + + if (coro->cctx && (coro->cctx->flags & CC_TRACE)) + api_trace (aTHX_ coro_current, 0); + + av_push (av_async_pool, newSVsv (coro_current)); +} + + +MODULE = Coro::State PACKAGE = PerlIO::cede + +BOOT: + PerlIO_define_layer (aTHX_ &PerlIO_cede); + + +MODULE = Coro::State PACKAGE = Coro::Semaphore SV * -_get_state () +new (SV *klass, SV *count_ = 0) CODE: { - struct { - int errorno; - int laststype; - int laststatval; - Stat_t statcache; - } data; - - data.errorno = errno; - data.laststype = PL_laststype; - data.laststatval = PL_laststatval; - data.statcache = PL_statcache; + /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ + AV *av = newAV (); + SV **ary; + + /* unfortunately, building manually saves memory */ + Newx (ary, 2, SV *); + AvALLOC (av) = ary; + AvARRAY (av) = ary; + AvMAX (av) = 1; + AvFILLp (av) = 0; + ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1); - RETVAL = newSVpvn ((char *)&data, sizeof data); + RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); } OUTPUT: RETVAL +SV * +count (SV *self) + CODE: + RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]); + OUTPUT: + RETVAL + void -_set_state (char *data_) - PROTOTYPE: $ +up (SV *self, int adjust = 1) + ALIAS: + adjust = 1 + CODE: + coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1); + +void +down (SV *self) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_semaphore_down); + +void +try (SV *self) + PPCODE: +{ + AV *av = (AV *)SvRV (self); + SV *count_sv = AvARRAY (av)[0]; + IV count = SvIVX (count_sv); + + if (count > 0) + { + --count; + SvIVX (count_sv) = count; + XSRETURN_YES; + } + else + XSRETURN_NO; +} + +void +waiters (SV *self) + CODE: +{ + AV *av = (AV *)SvRV (self); + + if (GIMME_V == G_SCALAR) + XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); + else + { + int i; + EXTEND (SP, AvFILLp (av) + 1 - 1); + for (i = 1; i <= AvFILLp (av); ++i) + PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i]))); + } +} + + +MODULE = Coro::State PACKAGE = Coro::AnyEvent + +BOOT: + sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); + +void +_schedule (...) CODE: { - struct { - int errorno; - int laststype; - int laststatval; - Stat_t statcache; - } *data = (void *)data_; - - errno = data->errorno; - PL_laststype = data->laststype; - PL_laststatval = data->laststatval; - PL_statcache = data->statcache; + static int incede; + + api_cede_notself (aTHX); + + ++incede; + while (coro_nready >= incede && api_cede (aTHX)) + ; + + sv_setsv (sv_activity, &PL_sv_undef); + if (coro_nready >= incede) + { + PUSHMARK (SP); + PUTBACK; + call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + } + + --incede; +} + + +MODULE = Coro::State PACKAGE = Coro::AIO + +void +_register (char *target, char *proto, SV *req) + CODE: +{ + HV *st; + GV *gvp; + CV *req_cv = sv_2cv (req, &st, &gvp, 0); + /* newXSproto doesn't return the CV on 5.8 */ + CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__); + sv_setpv ((SV *)slf_cv, proto); + sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0); } +