#define PERL_NO_GET_CONTEXT /* Workaround for mingw 32-bit compiler by mingw-w64.sf.net - has to come before any #include. * It also defines USE_NO_MINGW_SETJMP_TWO_ARGS for the mingw.org 32-bit compilers ... but * that's ok as that compiler makes no use of that symbol anyway */ #if defined(WIN32) && defined(__MINGW32__) && !defined(__MINGW64__) # define USE_NO_MINGW_SETJMP_TWO_ARGS 1 #endif #include "EXTERN.h" #include "perl.h" #include "XSUB.h" /* Workaround for XSUB.h bug under WIN32 */ #ifdef WIN32 # undef setjmp # if defined(USE_NO_MINGW_SETJMP_TWO_ARGS) || (!defined(__BORLANDC__) && !defined(__MINGW64__)) # define setjmp(x) _setjmp(x) # endif # if defined(__MINGW64__) # define setjmp(x) _setjmpex((x), mingw_getsp()) # endif #endif #ifdef HAS_PPPORT_H # define NEED_PL_signals # define NEED_sv_2pv_flags # include "ppport.h" # include "threads.h" #endif #ifndef sv_dup_inc # define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t)) #endif #ifndef PERL_UNUSED_RESULT # if defined(__GNUC__) && defined(HASATTRIBUTE_WARN_UNUSED_RESULT) # define PERL_UNUSED_RESULT(v) STMT_START { __typeof__(v) z = (v); (void)sizeof(z); } STMT_END # else # define PERL_UNUSED_RESULT(v) ((void)(v)) # endif #endif #ifdef USE_ITHREADS #ifdef __amigaos4__ # undef YIELD # define YIELD sleep(0) #endif #ifdef WIN32 # include /* Supposed to be in Winbase.h */ # ifndef STACK_SIZE_PARAM_IS_A_RESERVATION # define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000 # endif # include #else # ifdef OS2 typedef perl_os_thread pthread_t; # else # include # endif # include # define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v) # ifdef OLD_PTHREADS_API # define PERL_THREAD_DETACH(t) pthread_detach(&(t)) # else # define PERL_THREAD_DETACH(t) pthread_detach((t)) # endif #endif #if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM) # include #endif /* Values for 'state' member */ #define PERL_ITHR_DETACHED 1 /* Thread has been detached */ #define PERL_ITHR_JOINED 2 /* Thread is being / has been joined */ #define PERL_ITHR_FINISHED 4 /* Thread has finished execution */ #define PERL_ITHR_THREAD_EXIT_ONLY 8 /* exit() only exits current thread */ #define PERL_ITHR_NONVIABLE 16 /* Thread creation failed */ #define PERL_ITHR_DIED 32 /* Thread finished by dying */ #define PERL_ITHR_UNCALLABLE (PERL_ITHR_DETACHED|PERL_ITHR_JOINED) typedef struct _ithread { struct _ithread *next; /* Next thread in the list */ struct _ithread *prev; /* Prev thread in the list */ PerlInterpreter *interp; /* The threads interpreter */ UV tid; /* Threads module's thread id */ perl_mutex mutex; /* Mutex for updating things in this struct */ int count; /* Reference count. See S_ithread_create. */ int state; /* Detached, joined, finished, etc. */ int gimme; /* Context of create */ SV *init_function; /* Code to run */ AV *params; /* Args to pass function */ #ifdef WIN32 DWORD thr; /* OS's idea if thread id */ HANDLE handle; /* OS's waitable handle */ #else pthread_t thr; /* OS's handle for the thread */ #endif IV stack_size; SV *err; /* Error from abnormally terminated thread */ char *err_class; /* Error object's classname if applicable */ #ifndef WIN32 sigset_t initial_sigmask; /* Thread wakes up with signals blocked */ #endif } ithread; #define MY_CXT_KEY "threads::_cxt" XS_VERSION typedef struct { /* Used by Perl interpreter for thread context switching */ ithread *context; } my_cxt_t; START_MY_CXT #define MY_POOL_KEY "threads::_pool" XS_VERSION typedef struct { /* Structure for 'main' thread * Also forms the 'base' for the doubly-linked list of threads */ ithread main_thread; /* Protects the creation and destruction of threads*/ perl_mutex create_destruct_mutex; UV tid_counter; IV joinable_threads; IV running_threads; IV detached_threads; IV total_threads; IV default_stack_size; IV page_size; } my_pool_t; #define dMY_POOL \ SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY, \ sizeof(MY_POOL_KEY)-1, TRUE); \ my_pool_t *my_poolp = INT2PTR(my_pool_t*, SvUV(my_pool_sv)) #define MY_POOL (*my_poolp) #if defined(WIN32) || (defined(__amigaos4__) && defined(__NEWLIB__)) # undef THREAD_SIGNAL_BLOCKING #else # define THREAD_SIGNAL_BLOCKING #endif #ifdef THREAD_SIGNAL_BLOCKING /* Block most signals for calling thread, setting the old signal mask to * oldmask, if it is not NULL */ STATIC int S_block_most_signals(sigset_t *oldmask) { sigset_t newmask; sigfillset(&newmask); /* Don't block certain "important" signals (stolen from mg.c) */ #ifdef SIGILL sigdelset(&newmask, SIGILL); #endif #ifdef SIGBUS sigdelset(&newmask, SIGBUS); #endif #ifdef SIGSEGV sigdelset(&newmask, SIGSEGV); #endif #if defined(VMS) /* no per-thread blocking available */ return sigprocmask(SIG_BLOCK, &newmask, oldmask); #else return pthread_sigmask(SIG_BLOCK, &newmask, oldmask); #endif /* VMS */ } /* Set the signal mask for this thread to newmask */ STATIC int S_set_sigmask(sigset_t *newmask) { #if defined(VMS) return sigprocmask(SIG_SETMASK, newmask, NULL); #else return pthread_sigmask(SIG_SETMASK, newmask, NULL); #endif /* VMS */ } #endif /* WIN32 */ /* Used by Perl interpreter for thread context switching */ STATIC void S_ithread_set(pTHX_ ithread *thread) { dMY_CXT; MY_CXT.context = thread; } STATIC ithread * S_ithread_get(pTHX) { dMY_CXT; return (MY_CXT.context); } /* Free any data (such as the Perl interpreter) attached to an ithread * structure. This is a bit like undef on SVs, where the SV isn't freed, * but the PVX is. Must be called with thread->mutex already locked. Also, * must be called with MY_POOL.create_destruct_mutex unlocked as destruction * of the interpreter can lead to recursive destruction calls that could * lead to a deadlock on that mutex. */ STATIC void S_ithread_clear(pTHX_ ithread *thread) { PerlInterpreter *interp; #ifndef WIN32 sigset_t origmask; #endif assert(((thread->state & PERL_ITHR_FINISHED) && (thread->state & PERL_ITHR_UNCALLABLE)) || (thread->state & PERL_ITHR_NONVIABLE)); #ifdef THREAD_SIGNAL_BLOCKING /* We temporarily set the interpreter context to the interpreter being * destroyed. It's in no condition to handle signals while it's being * taken apart. */ S_block_most_signals(&origmask); #endif interp = thread->interp; if (interp) { dTHXa(interp); PERL_SET_CONTEXT(interp); S_ithread_set(aTHX_ thread); SvREFCNT_dec(thread->params); thread->params = NULL; if (thread->err) { SvREFCNT_dec(thread->err); thread->err = Nullsv; } perl_destruct(interp); perl_free(interp); thread->interp = NULL; } PERL_SET_CONTEXT(aTHX); #ifdef THREAD_SIGNAL_BLOCKING S_set_sigmask(&origmask); #endif } /* Decrement the refcount of an ithread, and if it reaches zero, free it. * Must be called with the mutex held. * On return, mutex is released (or destroyed). */ STATIC void S_ithread_free(pTHX_ ithread *thread) PERL_TSA_RELEASE(thread->mutex) { #ifdef WIN32 HANDLE handle; #endif dMY_POOL; if (! (thread->state & PERL_ITHR_NONVIABLE)) { assert(thread->count > 0); if (--thread->count > 0) { MUTEX_UNLOCK(&thread->mutex); return; } assert((thread->state & PERL_ITHR_FINISHED) && (thread->state & PERL_ITHR_UNCALLABLE)); } MUTEX_UNLOCK(&thread->mutex); /* Main thread (0) is immortal and should never get here */ assert(thread->tid != 0); /* Remove from circular list of threads */ MUTEX_LOCK(&MY_POOL.create_destruct_mutex); assert(thread->prev && thread->next); thread->next->prev = thread->prev; thread->prev->next = thread->next; thread->next = NULL; thread->prev = NULL; MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); /* Thread is now disowned */ MUTEX_LOCK(&thread->mutex); S_ithread_clear(aTHX_ thread); #ifdef WIN32 handle = thread->handle; thread->handle = NULL; #endif MUTEX_UNLOCK(&thread->mutex); MUTEX_DESTROY(&thread->mutex); #ifdef WIN32 if (handle) { CloseHandle(handle); } #endif PerlMemShared_free(thread); /* total_threads >= 1 is used to veto cleanup by the main thread, * should it happen to exit while other threads still exist. * Decrement this as the very last thing in the thread's existence. * Otherwise, MY_POOL and global state such as PL_op_mutex may get * freed while we're still using it. */ MUTEX_LOCK(&MY_POOL.create_destruct_mutex); MY_POOL.total_threads--; MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); } static void S_ithread_count_inc(pTHX_ ithread *thread) PERL_TSA_EXCLUDES(thread->mutex) { MUTEX_LOCK(&thread->mutex); thread->count++; MUTEX_UNLOCK(&thread->mutex); } /* Warn if exiting with any unjoined threads */ STATIC int S_exit_warning(pTHX) { int veto_cleanup, warn; dMY_POOL; MUTEX_LOCK(&MY_POOL.create_destruct_mutex); veto_cleanup = (MY_POOL.total_threads > 0); warn = (MY_POOL.running_threads || MY_POOL.joinable_threads); MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); if (warn) { if (ckWARN_d(WARN_THREADS)) { Perl_warn(aTHX_ "Perl exited with active threads:\n\t%" IVdf " running and unjoined\n\t%" IVdf " finished and unjoined\n\t%" IVdf " running and detached\n", MY_POOL.running_threads, MY_POOL.joinable_threads, MY_POOL.detached_threads); } } return (veto_cleanup); } /* Called from perl_destruct() in each thread. If it's the main thread, * stop it from freeing everything if there are other threads still running. */ STATIC int Perl_ithread_hook(pTHX) { dMY_POOL; return ((aTHX == MY_POOL.main_thread.interp) ? S_exit_warning(aTHX) : 0); } /* MAGIC (in mg.h sense) hooks */ STATIC int ithread_mg_get(pTHX_ SV *sv, MAGIC *mg) { ithread *thread = (ithread *)mg->mg_ptr; SvIV_set(sv, PTR2IV(thread)); SvIOK_on(sv); return (0); } STATIC int ithread_mg_free(pTHX_ SV *sv, MAGIC *mg) { ithread *thread = (ithread *)mg->mg_ptr; PERL_UNUSED_ARG(sv); MUTEX_LOCK(&thread->mutex); S_ithread_free(aTHX_ thread); /* Releases MUTEX */ return (0); } STATIC int ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) { PERL_UNUSED_ARG(param); S_ithread_count_inc(aTHX_ (ithread *)mg->mg_ptr); return (0); } STATIC const MGVTBL ithread_vtbl = { ithread_mg_get, /* get */ 0, /* set */ 0, /* len */ 0, /* clear */ ithread_mg_free, /* free */ 0, /* copy */ ithread_mg_dup, /* dup */ #if (PERL_VERSION > 8) || (PERL_VERSION == 8 && PERL_SUBVERSION > 8) 0 /* local */ #endif }; /* Provided default, minimum and rational stack sizes */ STATIC IV S_good_stack_size(pTHX_ IV stack_size) { dMY_POOL; /* Use default stack size if no stack size specified */ if (! stack_size) { return (MY_POOL.default_stack_size); } #ifdef PTHREAD_STACK_MIN /* Can't use less than minimum */ if (stack_size < PTHREAD_STACK_MIN) { if (ckWARN(WARN_THREADS)) { Perl_warn(aTHX_ "Using minimum thread stack size of %" IVdf, (IV)PTHREAD_STACK_MIN); } return (PTHREAD_STACK_MIN); } #endif /* Round up to page size boundary */ if (MY_POOL.page_size <= 0) { #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE)) SETERRNO(0, SS_NORMAL); # ifdef _SC_PAGESIZE MY_POOL.page_size = sysconf(_SC_PAGESIZE); # else MY_POOL.page_size = sysconf(_SC_MMAP_PAGE_SIZE); # endif if ((long)MY_POOL.page_size < 0) { if (errno) { SV * const error = get_sv("@", 0); (void)SvUPGRADE(error, SVt_PV); Perl_croak(aTHX_ "PANIC: sysconf: %s", SvPV_nolen(error)); } else { Perl_croak(aTHX_ "PANIC: sysconf: pagesize unknown"); } } #else # ifdef HAS_GETPAGESIZE MY_POOL.page_size = getpagesize(); # else # if defined(I_SYS_PARAM) && defined(PAGESIZE) MY_POOL.page_size = PAGESIZE; # else MY_POOL.page_size = 8192; /* A conservative default */ # endif # endif if (MY_POOL.page_size <= 0) { Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)MY_POOL.page_size); } #endif } stack_size = ((stack_size + (MY_POOL.page_size - 1)) / MY_POOL.page_size) * MY_POOL.page_size; return (stack_size); } /* Run code within a JMPENV environment. * Using a separate function avoids * "variable 'foo' might be clobbered by 'longjmp'" * warnings. * The three _p vars return values to the caller */ static int S_jmpenv_run(pTHX_ int action, ithread *thread, int *len_p, int *exit_app_p, int *exit_code_p) { dJMPENV; volatile I32 oldscope = PL_scopestack_ix; int jmp_rc = 0; JMPENV_PUSH(jmp_rc); if (jmp_rc == 0) { if (action == 0) { /* Run the specified function */ *len_p = (int)call_sv(thread->init_function, thread->gimme|G_EVAL); } else if (action == 1) { /* Warn that thread died */ Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV); } else { /* Warn if there are unjoined threads */ S_exit_warning(aTHX); } } else if (jmp_rc == 2) { /* Thread exited */ *exit_app_p = 1; *exit_code_p = STATUS_CURRENT; while (PL_scopestack_ix > oldscope) { LEAVE; } } JMPENV_POP; return jmp_rc; } /* Starts executing the thread. * Passed as the C level function to run in the new thread. */ #ifdef WIN32 STATIC THREAD_RET_TYPE S_ithread_run(LPVOID arg) #else STATIC void * S_ithread_run(void * arg) #endif { ithread *thread = (ithread *)arg; int exit_app = 0; /* Thread terminated using 'exit' */ int exit_code = 0; int died = 0; /* Thread terminated abnormally */ dTHXa(thread->interp); dMY_POOL; /* The following mutex lock + mutex unlock pair explained. * * parent: * - calls ithread_create (and S_ithread_create), which: * - creates the new thread * - does MUTEX_LOCK(&thread->mutex) * - calls pthread_create(..., S_ithread_run,...) * child: * - starts the S_ithread_run (where we are now), which: * - tries to MUTEX_LOCK(&thread->mutex) * - blocks * parent: * - continues doing more createy stuff * - does MUTEX_UNLOCK(&thread->mutex) * - continues * child: * - finishes MUTEX_LOCK(&thread->mutex) * - does MUTEX_UNLOCK(&thread->mutex) * - continues */ MUTEX_LOCK(&thread->mutex); MUTEX_UNLOCK(&thread->mutex); PERL_SET_CONTEXT(thread->interp); S_ithread_set(aTHX_ thread); #ifdef THREAD_SIGNAL_BLOCKING /* Thread starts with most signals blocked - restore the signal mask from * the ithread struct. */ S_set_sigmask(&thread->initial_sigmask); #endif PL_perl_destruct_level = 2; { AV *params = thread->params; int len = (int)av_len(params)+1; int ii; int jmp_rc; dSP; ENTER; SAVETMPS; /* Put args on the stack */ PUSHMARK(SP); for (ii=0; ii < len; ii++) { XPUSHs(av_shift(params)); } PUTBACK; jmp_rc = S_jmpenv_run(aTHX_ 0, thread, &len, &exit_app, &exit_code); #ifdef THREAD_SIGNAL_BLOCKING /* The interpreter is finished, so this thread can stop receiving * signals. This way, our signal handler doesn't get called in the * middle of our parent thread calling perl_destruct()... */ S_block_most_signals(NULL); #endif /* Remove args from stack and put back in params array */ SPAGAIN; for (ii=len-1; ii >= 0; ii--) { SV *sv = POPs; if (jmp_rc == 0 && (thread->gimme & G_WANT) != G_VOID) { av_store(params, ii, SvREFCNT_inc(sv)); } } FREETMPS; LEAVE; /* Check for abnormal termination */ if (SvTRUE(ERRSV)) { died = PERL_ITHR_DIED; thread->err = newSVsv(ERRSV); /* If ERRSV is an object, remember the classname and then * rebless into 'main' so it will survive 'cloning' */ if (sv_isobject(thread->err)) { thread->err_class = HvNAME(SvSTASH(SvRV(thread->err))); sv_bless(thread->err, gv_stashpv("main", 0)); } if (ckWARN_d(WARN_THREADS)) { (void)S_jmpenv_run(aTHX_ 1, thread, NULL, &exit_app, &exit_code); } } /* Release function ref */ SvREFCNT_dec(thread->init_function); thread->init_function = Nullsv; } PerlIO_flush((PerlIO *)NULL); MUTEX_LOCK(&MY_POOL.create_destruct_mutex); MUTEX_LOCK(&thread->mutex); /* Mark as finished */ thread->state |= (PERL_ITHR_FINISHED | died); /* Clear exit flag if required */ if (thread->state & PERL_ITHR_THREAD_EXIT_ONLY) { exit_app = 0; } /* Adjust thread status counts */ if (thread->state & PERL_ITHR_DETACHED) { MY_POOL.detached_threads--; } else { MY_POOL.running_threads--; MY_POOL.joinable_threads++; } MUTEX_UNLOCK(&thread->mutex); MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); /* Exit application if required */ if (exit_app) { (void)S_jmpenv_run(aTHX_ 2, thread, NULL, &exit_app, &exit_code); my_exit(exit_code); } /* At this point, the interpreter may have been freed, so call * free in the the context of of the 'main' interpreter which * can't have been freed due to the veto_cleanup mechanism. */ aTHX = MY_POOL.main_thread.interp; MUTEX_LOCK(&thread->mutex); S_ithread_free(aTHX_ thread); /* Releases MUTEX */ #ifdef WIN32 return ((DWORD)0); #else return (0); #endif } /* Type conversion helper functions */ STATIC SV * S_ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc) { SV *sv; MAGIC *mg; if (inc) S_ithread_count_inc(aTHX_ thread); if (! obj) { obj = newSV(0); } sv = newSVrv(obj, classname); sv_setiv(sv, PTR2IV(thread)); mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, &ithread_vtbl, (char *)thread, 0); mg->mg_flags |= MGf_DUP; SvREADONLY_on(sv); return (obj); } STATIC ithread * S_SV_to_ithread(pTHX_ SV *sv) { /* Argument is a thread */ if (SvROK(sv)) { return (INT2PTR(ithread *, SvIV(SvRV(sv)))); } /* Argument is classname, therefore return current thread */ return (S_ithread_get(aTHX)); } /* threads->create() * Called in context of parent thread. * Called with my_pool->create_destruct_mutex locked. * (Unlocked both on error and on success.) */ STATIC ithread * S_ithread_create( PerlInterpreter *parent_perl, my_pool_t *my_pool, SV *init_function, IV stack_size, int gimme, int exit_opt, int params_start, int num_params) PERL_TSA_RELEASE(my_pool->create_destruct_mutex) { dTHXa(parent_perl); ithread *thread; ithread *current_thread = S_ithread_get(aTHX); AV *params; SV **array; #if PERL_VERSION <= 8 && PERL_SUBVERSION <= 7 SV **tmps_tmp = PL_tmps_stack; IV tmps_ix = PL_tmps_ix; #endif #ifndef WIN32 int rc_stack_size = 0; int rc_thread_create = 0; #endif /* Allocate thread structure in context of the main thread's interpreter */ { PERL_SET_CONTEXT(my_pool->main_thread.interp); thread = (ithread *)PerlMemShared_malloc(sizeof(ithread)); } PERL_SET_CONTEXT(aTHX); if (!thread) { /* This lock was acquired in ithread_create() * prior to calling S_ithread_create(). */ MUTEX_UNLOCK(&my_pool->create_destruct_mutex); { int fd = PerlIO_fileno(Perl_error_log); if (fd >= 0) { /* If there's no error_log, we cannot scream about it missing. */ PERL_UNUSED_RESULT(PerlLIO_write(fd, PL_no_mem, strlen(PL_no_mem))); } } my_exit(1); } Zero(thread, 1, ithread); /* Add to threads list */ thread->next = &my_pool->main_thread; thread->prev = my_pool->main_thread.prev; my_pool->main_thread.prev = thread; thread->prev->next = thread; my_pool->total_threads++; /* 1 ref to be held by the local var 'thread' in S_ithread_run(). * 1 ref to be held by the threads object that we assume we will * be embedded in upon our return. * 1 ref to be the responsibility of join/detach, so we don't get * freed until join/detach, even if no thread objects remain. * This allows the following to work: * { threads->create(sub{...}); } threads->object(1)->join; */ thread->count = 3; /* Block new thread until ->create() call finishes */ MUTEX_INIT(&thread->mutex); MUTEX_LOCK(&thread->mutex); /* See S_ithread_run() for more detail. */ thread->tid = my_pool->tid_counter++; thread->stack_size = S_good_stack_size(aTHX_ stack_size); thread->gimme = gimme; thread->state = exit_opt; /* "Clone" our interpreter into the thread's interpreter. * This gives thread access to "static data" and code. */ PerlIO_flush((PerlIO *)NULL); S_ithread_set(aTHX_ thread); SAVEBOOL(PL_srand_called); /* Save this so it becomes the correct value */ PL_srand_called = FALSE; /* Set it to false so we can detect if it gets set during the clone */ #ifdef THREAD_SIGNAL_BLOCKING /* perl_clone() will leave us the new interpreter's context. This poses * two problems for our signal handler. First, it sets the new context * before the new interpreter struct is fully initialized, so our signal * handler might find bogus data in the interpreter struct it gets. * Second, even if the interpreter is initialized before a signal comes in, * we would like to avoid that interpreter receiving notifications for * signals (especially when they ought to be for the one running in this * thread), until it is running in its own thread. Another problem is that * the new thread will not have set the context until some time after it * has started, so it won't be safe for our signal handler to run until * that time. * * So we block most signals here, so the new thread will inherit the signal * mask, and unblock them right after the thread creation. The original * mask is saved in the thread struct so that the new thread can restore * the original mask. */ S_block_most_signals(&thread->initial_sigmask); #endif #ifdef WIN32 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST); #else thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE); #endif /* perl_clone() leaves us in new interpreter's context. As it is tricky * to spot an implicit aTHX, create a new scope with aTHX matching the * context for the duration of our work for new interpreter. */ { #if (PERL_VERSION > 13) || (PERL_VERSION == 13 && PERL_SUBVERSION > 1) CLONE_PARAMS *clone_param = Perl_clone_params_new(aTHX, thread->interp); #else CLONE_PARAMS clone_param_s; CLONE_PARAMS *clone_param = &clone_param_s; #endif dTHXa(thread->interp); MY_CXT_CLONE; #if (PERL_VERSION < 13) || (PERL_VERSION == 13 && PERL_SUBVERSION <= 1) clone_param->flags = 0; #endif /* Here we remove END blocks since they should only run in the thread * they are created */ SvREFCNT_dec(PL_endav); PL_endav = NULL; if (SvPOK(init_function)) { thread->init_function = newSV(0); sv_copypv(thread->init_function, init_function); } else { thread->init_function = sv_dup_inc(init_function, clone_param); } thread->params = params = newAV(); av_extend(params, num_params - 1); AvFILLp(params) = num_params - 1; array = AvARRAY(params); /* params_start is an offset onto the Perl stack. This can be reallocated (and hence move) as a side effect of calls to perl_clone() and sv_dup_inc(). Hence copy the parameters somewhere under our control first, before duplicating. */ #if (PERL_VERSION > 8) Copy(parent_perl->Istack_base + params_start, array, num_params, SV *); #else Copy(parent_perl->Tstack_base + params_start, array, num_params, SV *); #endif while (num_params--) { *array = sv_dup_inc(*array, clone_param); ++array; } #if (PERL_VERSION > 13) || (PERL_VERSION == 13 && PERL_SUBVERSION > 1) Perl_clone_params_del(clone_param); #endif #if PERL_VERSION <= 8 && PERL_SUBVERSION <= 7 /* The code below checks that anything living on the tmps stack and * has been cloned (so it lives in the ptr_table) has a refcount * higher than 0. * * If the refcount is 0 it means that a something on the stack/context * was holding a reference to it and since we init_stacks() in * perl_clone that won't get cleaned and we will get a leaked scalar. * The reason it was cloned was that it lived on the @_ stack. * * Example of this can be found in bugreport 15837 where calls in the * parameter list end up as a temp. * * As of 5.8.8 this is done in perl_clone. */ while (tmps_ix > 0) { SV* sv = (SV*)ptr_table_fetch(PL_ptr_table, tmps_tmp[tmps_ix]); tmps_ix--; if (sv && SvREFCNT(sv) == 0) { SvREFCNT_inc_void(sv); SvREFCNT_dec(sv); } } #endif SvTEMP_off(thread->init_function); ptr_table_free(PL_ptr_table); PL_ptr_table = NULL; PL_exit_flags |= PERL_EXIT_DESTRUCT_END; } S_ithread_set(aTHX_ current_thread); PERL_SET_CONTEXT(aTHX); /* Create/start the thread */ #ifdef WIN32 thread->handle = CreateThread(NULL, (DWORD)thread->stack_size, S_ithread_run, (LPVOID)thread, STACK_SIZE_PARAM_IS_A_RESERVATION, &thread->thr); #else { STATIC pthread_attr_t attr; STATIC int attr_inited = 0; STATIC int attr_joinable = PTHREAD_CREATE_JOINABLE; if (! attr_inited) { pthread_attr_init(&attr); attr_inited = 1; } # ifdef PTHREAD_ATTR_SETDETACHSTATE /* Threads start out joinable */ PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable); # endif # ifdef _POSIX_THREAD_ATTR_STACKSIZE /* Set thread's stack size */ if (thread->stack_size > 0) { rc_stack_size = pthread_attr_setstacksize(&attr, (size_t)thread->stack_size); } # endif /* Create the thread */ if (! rc_stack_size) { # ifdef OLD_PTHREADS_API rc_thread_create = pthread_create(&thread->thr, attr, S_ithread_run, (void *)thread); # else # if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM) pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM); # endif rc_thread_create = pthread_create(&thread->thr, &attr, S_ithread_run, (void *)thread); # endif } #ifdef THREAD_SIGNAL_BLOCKING /* Now it's safe to accept signals, since we're in our own interpreter's * context and we have created the thread. */ S_set_sigmask(&thread->initial_sigmask); #endif # ifdef _POSIX_THREAD_ATTR_STACKSIZE /* Try to get thread's actual stack size */ { size_t stacksize; #ifdef HPUX1020 stacksize = pthread_attr_getstacksize(attr); #else if (! pthread_attr_getstacksize(&attr, &stacksize)) #endif if (stacksize > 0) { thread->stack_size = (IV)stacksize; } } # endif } #endif /* Check for errors */ #ifdef WIN32 if (thread->handle == NULL) { #else if (rc_stack_size || rc_thread_create) { #endif /* Must unlock mutex for destruct call */ /* This lock was acquired in ithread_create() * prior to calling S_ithread_create(). */ MUTEX_UNLOCK(&my_pool->create_destruct_mutex); thread->state |= PERL_ITHR_NONVIABLE; S_ithread_free(aTHX_ thread); /* Releases MUTEX */ #ifndef WIN32 if (ckWARN_d(WARN_THREADS)) { if (rc_stack_size) { Perl_warn(aTHX_ "Thread creation failed: pthread_attr_setstacksize(%" IVdf ") returned %d", thread->stack_size, rc_stack_size); } else { Perl_warn(aTHX_ "Thread creation failed: pthread_create returned %d", rc_thread_create); } } #endif return (NULL); } my_pool->running_threads++; MUTEX_UNLOCK(&my_pool->create_destruct_mutex); return (thread); CLANG_DIAG_IGNORE(-Wthread-safety); /* warning: mutex 'thread->mutex' is not held on every path through here [-Wthread-safety-analysis] */ } #if defined(__clang__) || defined(__clang) CLANG_DIAG_RESTORE; #endif #endif /* USE_ITHREADS */ MODULE = threads PACKAGE = threads PREFIX = ithread_ PROTOTYPES: DISABLE #ifdef USE_ITHREADS void ithread_create(...) PREINIT: char *classname; ithread *thread; SV *function_to_call; HV *specs; IV stack_size; int context; int exit_opt; SV *thread_exit_only; char *str; int idx; dMY_POOL; CODE: if ((items >= 2) && SvROK(ST(1)) && SvTYPE(SvRV(ST(1)))==SVt_PVHV) { if (--items < 2) { Perl_croak(aTHX_ "Usage: threads->create(\\%%specs, function, ...)"); } specs = (HV*)SvRV(ST(1)); idx = 1; } else { if (items < 2) { Perl_croak(aTHX_ "Usage: threads->create(function, ...)"); } specs = NULL; idx = 0; } if (sv_isobject(ST(0))) { /* $thr->create() */ classname = HvNAME(SvSTASH(SvRV(ST(0)))); thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); MUTEX_LOCK(&thread->mutex); stack_size = thread->stack_size; exit_opt = thread->state & PERL_ITHR_THREAD_EXIT_ONLY; MUTEX_UNLOCK(&thread->mutex); } else { /* threads->create() */ classname = (char *)SvPV_nolen(ST(0)); stack_size = MY_POOL.default_stack_size; thread_exit_only = get_sv("threads::thread_exit_only", GV_ADD); exit_opt = (SvTRUE(thread_exit_only)) ? PERL_ITHR_THREAD_EXIT_ONLY : 0; } function_to_call = ST(idx+1); context = -1; if (specs) { SV **svp; /* stack_size */ if ((svp = hv_fetchs(specs, "stack", 0))) { stack_size = SvIV(*svp); } else if ((svp = hv_fetchs(specs, "stacksize", 0))) { stack_size = SvIV(*svp); } else if ((svp = hv_fetchs(specs, "stack_size", 0))) { stack_size = SvIV(*svp); } /* context */ if ((svp = hv_fetchs(specs, "context", 0))) { str = (char *)SvPV_nolen(*svp); switch (*str) { case 'a': case 'A': case 'l': case 'L': context = G_ARRAY; break; case 's': case 'S': context = G_SCALAR; break; case 'v': case 'V': context = G_VOID; break; default: Perl_croak(aTHX_ "Invalid context: %s", str); } } else if ((svp = hv_fetchs(specs, "array", 0))) { if (SvTRUE(*svp)) { context = G_ARRAY; } } else if ((svp = hv_fetchs(specs, "list", 0))) { if (SvTRUE(*svp)) { context = G_ARRAY; } } else if ((svp = hv_fetchs(specs, "scalar", 0))) { if (SvTRUE(*svp)) { context = G_SCALAR; } } else if ((svp = hv_fetchs(specs, "void", 0))) { if (SvTRUE(*svp)) { context = G_VOID; } } /* exit => thread_only */ if ((svp = hv_fetchs(specs, "exit", 0))) { str = (char *)SvPV_nolen(*svp); exit_opt = (*str == 't' || *str == 'T') ? PERL_ITHR_THREAD_EXIT_ONLY : 0; } } if (context == -1) { context = GIMME_V; /* Implicit context */ } else { context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID))); } /* Create thread */ MUTEX_LOCK(&MY_POOL.create_destruct_mutex); thread = S_ithread_create(aTHX_ &MY_POOL, function_to_call, stack_size, context, exit_opt, ax + idx + 2, items > 2 ? items - 2 : 0); if (! thread) { XSRETURN_UNDEF; /* Mutex already unlocked */ } ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, FALSE)); /* Let thread run. */ /* See S_ithread_run() for more detail. */ CLANG_DIAG_IGNORE(-Wthread-safety); /* warning: releasing mutex 'thread->mutex' that was not held [-Wthread-safety-analysis] */ MUTEX_UNLOCK(&thread->mutex); CLANG_DIAG_RESTORE; /* XSRETURN(1); - implied */ void ithread_list(...) PREINIT: char *classname; ithread *thread; int list_context; IV count = 0; int want_running = 0; int state; dMY_POOL; PPCODE: /* Class method only */ if (SvROK(ST(0))) { Perl_croak(aTHX_ "Usage: threads->list(...)"); } classname = (char *)SvPV_nolen(ST(0)); /* Calling context */ list_context = (GIMME_V == G_ARRAY); /* Running or joinable parameter */ if (items > 1) { want_running = SvTRUE(ST(1)); } /* Walk through threads list */ MUTEX_LOCK(&MY_POOL.create_destruct_mutex); for (thread = MY_POOL.main_thread.next; thread != &MY_POOL.main_thread; thread = thread->next) { MUTEX_LOCK(&thread->mutex); state = thread->state; MUTEX_UNLOCK(&thread->mutex); /* Ignore detached or joined threads */ if (state & PERL_ITHR_UNCALLABLE) { continue; } /* Filter per parameter */ if (items > 1) { if (want_running) { if (state & PERL_ITHR_FINISHED) { continue; /* Not running */ } } else { if (! (state & PERL_ITHR_FINISHED)) { continue; /* Still running - not joinable yet */ } } } /* Push object on stack if list context */ if (list_context) { XPUSHs(sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE))); } count++; } MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); /* If scalar context, send back count */ if (! list_context) { XSRETURN_IV(count); } void ithread_self(...) PREINIT: char *classname; ithread *thread; CODE: /* Class method only */ if ((items != 1) || SvROK(ST(0))) { Perl_croak(aTHX_ "Usage: threads->self()"); } classname = (char *)SvPV_nolen(ST(0)); thread = S_ithread_get(aTHX); ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)); /* XSRETURN(1); - implied */ void ithread_tid(...) PREINIT: ithread *thread; CODE: PERL_UNUSED_VAR(items); thread = S_SV_to_ithread(aTHX_ ST(0)); XST_mUV(0, thread->tid); /* XSRETURN(1); - implied */ void ithread_join(...) PREINIT: ithread *thread; ithread *current_thread; int join_err; AV *params = NULL; int len; int ii; #ifndef WIN32 int rc_join; void *retval; #endif dMY_POOL; PPCODE: /* Object method only */ if ((items != 1) || ! sv_isobject(ST(0))) { Perl_croak(aTHX_ "Usage: $thr->join()"); } /* Check if the thread is joinable and not ourselves */ thread = S_SV_to_ithread(aTHX_ ST(0)); current_thread = S_ithread_get(aTHX); MUTEX_LOCK(&thread->mutex); if ((join_err = (thread->state & PERL_ITHR_UNCALLABLE))) { MUTEX_UNLOCK(&thread->mutex); Perl_croak(aTHX_ (join_err & PERL_ITHR_DETACHED) ? "Cannot join a detached thread" : "Thread already joined"); } else if (thread->tid == current_thread->tid) { MUTEX_UNLOCK(&thread->mutex); Perl_croak(aTHX_ "Cannot join self"); } /* Mark as joined */ thread->state |= PERL_ITHR_JOINED; MUTEX_UNLOCK(&thread->mutex); MUTEX_LOCK(&MY_POOL.create_destruct_mutex); MY_POOL.joinable_threads--; MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); /* Join the thread */ #ifdef WIN32 if (WaitForSingleObject(thread->handle, INFINITE) != WAIT_OBJECT_0) { /* Timeout/abandonment unexpected here; check $^E */ Perl_croak(aTHX_ "PANIC: underlying join failed"); }; #else if ((rc_join = pthread_join(thread->thr, &retval)) != 0) { /* In progress/deadlock/unknown unexpected here; check $! */ errno = rc_join; Perl_croak(aTHX_ "PANIC: underlying join failed"); }; #endif MUTEX_LOCK(&thread->mutex); /* Get the return value from the call_sv */ /* Objects do not survive this process - FIXME */ if ((thread->gimme & G_WANT) != G_VOID) { #if (PERL_VERSION < 13) || (PERL_VERSION == 13 && PERL_SUBVERSION <= 1) AV *params_copy; PerlInterpreter *other_perl; CLONE_PARAMS clone_params; params_copy = thread->params; other_perl = thread->interp; clone_params.stashes = newAV(); clone_params.flags = CLONEf_JOIN_IN; PL_ptr_table = ptr_table_new(); S_ithread_set(aTHX_ thread); /* Ensure 'meaningful' addresses retain their meaning */ ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef); ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no); ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes); params = (AV *)sv_dup((SV*)params_copy, &clone_params); S_ithread_set(aTHX_ current_thread); SvREFCNT_dec(clone_params.stashes); SvREFCNT_inc_void(params); ptr_table_free(PL_ptr_table); PL_ptr_table = NULL; #else AV *params_copy; PerlInterpreter *other_perl = thread->interp; CLONE_PARAMS *clone_params = Perl_clone_params_new(other_perl, aTHX); params_copy = thread->params; clone_params->flags |= CLONEf_JOIN_IN; PL_ptr_table = ptr_table_new(); S_ithread_set(aTHX_ thread); /* Ensure 'meaningful' addresses retain their meaning */ ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef); ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no); ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes); params = (AV *)sv_dup((SV*)params_copy, clone_params); S_ithread_set(aTHX_ current_thread); Perl_clone_params_del(clone_params); SvREFCNT_inc_void(params); ptr_table_free(PL_ptr_table); PL_ptr_table = NULL; #endif } /* If thread didn't die, then we can free its interpreter */ if (! (thread->state & PERL_ITHR_DIED)) { S_ithread_clear(aTHX_ thread); } S_ithread_free(aTHX_ thread); /* Releases MUTEX */ /* If no return values, then just return */ if (! params) { XSRETURN_UNDEF; } /* Put return values on stack */ len = (int)AvFILL(params); for (ii=0; ii <= len; ii++) { SV* param = av_shift(params); XPUSHs(sv_2mortal(param)); } /* Free return value array */ SvREFCNT_dec(params); void ithread_yield(...) CODE: PERL_UNUSED_VAR(items); YIELD; void ithread_detach(...) PREINIT: ithread *thread; int detach_err; dMY_POOL; CODE: PERL_UNUSED_VAR(items); /* Detach the thread */ thread = S_SV_to_ithread(aTHX_ ST(0)); MUTEX_LOCK(&MY_POOL.create_destruct_mutex); MUTEX_LOCK(&thread->mutex); if (! (detach_err = (thread->state & PERL_ITHR_UNCALLABLE))) { /* Thread is detachable */ thread->state |= PERL_ITHR_DETACHED; #ifdef WIN32 /* Windows has no 'detach thread' function */ #else PERL_THREAD_DETACH(thread->thr); #endif if (thread->state & PERL_ITHR_FINISHED) { MY_POOL.joinable_threads--; } else { MY_POOL.running_threads--; MY_POOL.detached_threads++; } } MUTEX_UNLOCK(&thread->mutex); MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); if (detach_err) { Perl_croak(aTHX_ (detach_err & PERL_ITHR_DETACHED) ? "Thread already detached" : "Cannot detach a joined thread"); } /* If thread is finished and didn't die, * then we can free its interpreter */ MUTEX_LOCK(&thread->mutex); if ((thread->state & PERL_ITHR_FINISHED) && ! (thread->state & PERL_ITHR_DIED)) { S_ithread_clear(aTHX_ thread); } S_ithread_free(aTHX_ thread); /* Releases MUTEX */ void ithread_kill(...) PREINIT: ithread *thread; char *sig_name; IV signal; int no_handler = 1; CODE: /* Must have safe signals */ if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) { Perl_croak(aTHX_ "Cannot signal threads without safe signals"); } /* Object method only */ if ((items != 2) || ! sv_isobject(ST(0))) { Perl_croak(aTHX_ "Usage: $thr->kill('SIG...')"); } /* Get signal */ sig_name = SvPV_nolen(ST(1)); if (isALPHA(*sig_name)) { if (*sig_name == 'S' && sig_name[1] == 'I' && sig_name[2] == 'G') { sig_name += 3; } if ((signal = whichsig(sig_name)) < 0) { Perl_croak(aTHX_ "Unrecognized signal name: %s", sig_name); } } else { signal = SvIV(ST(1)); } /* Set the signal for the thread */ thread = S_SV_to_ithread(aTHX_ ST(0)); MUTEX_LOCK(&thread->mutex); if (thread->interp && ! (thread->state & PERL_ITHR_FINISHED)) { dTHXa(thread->interp); if (PL_psig_pend && PL_psig_ptr[signal]) { PL_psig_pend[signal]++; PL_sig_pending = 1; no_handler = 0; } } else { /* Ignore signal to terminated/finished thread */ no_handler = 0; } MUTEX_UNLOCK(&thread->mutex); if (no_handler) { Perl_croak(aTHX_ "Signal %s received in thread %" UVuf ", but no signal handler set.", sig_name, thread->tid); } /* Return the thread to allow for method chaining */ ST(0) = ST(0); /* XSRETURN(1); - implied */ void ithread_DESTROY(...) CODE: PERL_UNUSED_VAR(items); sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar); void ithread_equal(...) PREINIT: int are_equal = 0; CODE: PERL_UNUSED_VAR(items); /* Compares TIDs to determine thread equality */ if (sv_isobject(ST(0)) && sv_isobject(ST(1))) { ithread *thr1 = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); ithread *thr2 = INT2PTR(ithread *, SvIV(SvRV(ST(1)))); are_equal = (thr1->tid == thr2->tid); } if (are_equal) { XST_mYES(0); } else { /* Return 0 on false for backward compatibility */ XST_mIV(0, 0); } /* XSRETURN(1); - implied */ void ithread_object(...) PREINIT: char *classname; SV *arg; UV tid; ithread *thread; int state; int have_obj = 0; dMY_POOL; CODE: /* Class method only */ if (SvROK(ST(0))) { Perl_croak(aTHX_ "Usage: threads->object($tid)"); } classname = (char *)SvPV_nolen(ST(0)); /* Turn $tid from PVLV to SV if needed (bug #73330) */ arg = ST(1); SvGETMAGIC(arg); if ((items < 2) || ! SvOK(arg)) { XSRETURN_UNDEF; } /* threads->object($tid) */ tid = SvUV(arg); /* If current thread wants its own object, then behave the same as ->self() */ thread = S_ithread_get(aTHX); if (thread->tid == tid) { ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)); have_obj = 1; } else { /* Walk through threads list */ MUTEX_LOCK(&MY_POOL.create_destruct_mutex); for (thread = MY_POOL.main_thread.next; thread != &MY_POOL.main_thread; thread = thread->next) { /* Look for TID */ if (thread->tid == tid) { /* Ignore if detached or joined */ MUTEX_LOCK(&thread->mutex); state = thread->state; MUTEX_UNLOCK(&thread->mutex); if (! (state & PERL_ITHR_UNCALLABLE)) { /* Put object on stack */ ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)); have_obj = 1; } break; } } MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); } if (! have_obj) { XSRETURN_UNDEF; } /* XSRETURN(1); - implied */ void ithread__handle(...); PREINIT: ithread *thread; CODE: PERL_UNUSED_VAR(items); thread = S_SV_to_ithread(aTHX_ ST(0)); #ifdef WIN32 XST_mUV(0, PTR2UV(&thread->handle)); #else XST_mUV(0, PTR2UV(&thread->thr)); #endif /* XSRETURN(1); - implied */ void ithread_get_stack_size(...) PREINIT: IV stack_size; dMY_POOL; CODE: PERL_UNUSED_VAR(items); if (sv_isobject(ST(0))) { /* $thr->get_stack_size() */ ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); stack_size = thread->stack_size; } else { /* threads->get_stack_size() */ stack_size = MY_POOL.default_stack_size; } XST_mIV(0, stack_size); /* XSRETURN(1); - implied */ void ithread_set_stack_size(...) PREINIT: IV old_size; dMY_POOL; CODE: if (items != 2) { Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)"); } if (sv_isobject(ST(0))) { Perl_croak(aTHX_ "Cannot change stack size of an existing thread"); } if (! looks_like_number(ST(1))) { Perl_croak(aTHX_ "Stack size must be numeric"); } old_size = MY_POOL.default_stack_size; MY_POOL.default_stack_size = S_good_stack_size(aTHX_ SvIV(ST(1))); XST_mIV(0, old_size); /* XSRETURN(1); - implied */ void ithread_is_running(...) PREINIT: ithread *thread; CODE: /* Object method only */ if ((items != 1) || ! sv_isobject(ST(0))) { Perl_croak(aTHX_ "Usage: $thr->is_running()"); } thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); MUTEX_LOCK(&thread->mutex); ST(0) = (thread->state & PERL_ITHR_FINISHED) ? &PL_sv_no : &PL_sv_yes; MUTEX_UNLOCK(&thread->mutex); /* XSRETURN(1); - implied */ void ithread_is_detached(...) PREINIT: ithread *thread; CODE: PERL_UNUSED_VAR(items); thread = S_SV_to_ithread(aTHX_ ST(0)); MUTEX_LOCK(&thread->mutex); ST(0) = (thread->state & PERL_ITHR_DETACHED) ? &PL_sv_yes : &PL_sv_no; MUTEX_UNLOCK(&thread->mutex); /* XSRETURN(1); - implied */ void ithread_is_joinable(...) PREINIT: ithread *thread; CODE: /* Object method only */ if ((items != 1) || ! sv_isobject(ST(0))) { Perl_croak(aTHX_ "Usage: $thr->is_joinable()"); } thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); MUTEX_LOCK(&thread->mutex); ST(0) = ((thread->state & PERL_ITHR_FINISHED) && ! (thread->state & PERL_ITHR_UNCALLABLE)) ? &PL_sv_yes : &PL_sv_no; MUTEX_UNLOCK(&thread->mutex); /* XSRETURN(1); - implied */ void ithread_wantarray(...) PREINIT: ithread *thread; CODE: PERL_UNUSED_VAR(items); thread = S_SV_to_ithread(aTHX_ ST(0)); ST(0) = ((thread->gimme & G_WANT) == G_ARRAY) ? &PL_sv_yes : ((thread->gimme & G_WANT) == G_VOID) ? &PL_sv_undef /* G_SCALAR */ : &PL_sv_no; /* XSRETURN(1); - implied */ void ithread_set_thread_exit_only(...) PREINIT: ithread *thread; CODE: if (items != 2) { Perl_croak(aTHX_ "Usage: ->set_thread_exit_only(boolean)"); } thread = S_SV_to_ithread(aTHX_ ST(0)); MUTEX_LOCK(&thread->mutex); if (SvTRUE(ST(1))) { thread->state |= PERL_ITHR_THREAD_EXIT_ONLY; } else { thread->state &= ~PERL_ITHR_THREAD_EXIT_ONLY; } MUTEX_UNLOCK(&thread->mutex); void ithread_error(...) PREINIT: ithread *thread; SV *err = NULL; CODE: /* Object method only */ if ((items != 1) || ! sv_isobject(ST(0))) { Perl_croak(aTHX_ "Usage: $thr->err()"); } thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); MUTEX_LOCK(&thread->mutex); /* If thread died, then clone the error into the calling thread */ if (thread->state & PERL_ITHR_DIED) { #if (PERL_VERSION < 13) || (PERL_VERSION == 13 && PERL_SUBVERSION <= 1) PerlInterpreter *other_perl; CLONE_PARAMS clone_params; ithread *current_thread; other_perl = thread->interp; clone_params.stashes = newAV(); clone_params.flags = CLONEf_JOIN_IN; PL_ptr_table = ptr_table_new(); current_thread = S_ithread_get(aTHX); S_ithread_set(aTHX_ thread); /* Ensure 'meaningful' addresses retain their meaning */ ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef); ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no); ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes); err = sv_dup(thread->err, &clone_params); S_ithread_set(aTHX_ current_thread); SvREFCNT_dec(clone_params.stashes); SvREFCNT_inc_void(err); /* If error was an object, bless it into the correct class */ if (thread->err_class) { sv_bless(err, gv_stashpv(thread->err_class, 1)); } ptr_table_free(PL_ptr_table); PL_ptr_table = NULL; #else PerlInterpreter *other_perl = thread->interp; CLONE_PARAMS *clone_params = Perl_clone_params_new(other_perl, aTHX); ithread *current_thread; clone_params->flags |= CLONEf_JOIN_IN; PL_ptr_table = ptr_table_new(); current_thread = S_ithread_get(aTHX); S_ithread_set(aTHX_ thread); /* Ensure 'meaningful' addresses retain their meaning */ ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef); ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no); ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes); err = sv_dup(thread->err, clone_params); S_ithread_set(aTHX_ current_thread); Perl_clone_params_del(clone_params); SvREFCNT_inc_void(err); /* If error was an object, bless it into the correct class */ if (thread->err_class) { sv_bless(err, gv_stashpv(thread->err_class, 1)); } ptr_table_free(PL_ptr_table); PL_ptr_table = NULL; #endif } MUTEX_UNLOCK(&thread->mutex); if (! err) { XSRETURN_UNDEF; } ST(0) = sv_2mortal(err); /* XSRETURN(1); - implied */ #endif /* USE_ITHREADS */ BOOT: { #ifdef USE_ITHREADS SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY, sizeof(MY_POOL_KEY)-1, TRUE); my_pool_t *my_poolp = (my_pool_t*)SvPVX(newSV(sizeof(my_pool_t)-1)); MY_CXT_INIT; Zero(my_poolp, 1, my_pool_t); sv_setuv(my_pool_sv, PTR2UV(my_poolp)); PL_perl_destruct_level = 2; MUTEX_INIT(&MY_POOL.create_destruct_mutex); MUTEX_LOCK(&MY_POOL.create_destruct_mutex); PL_threadhook = &Perl_ithread_hook; MY_POOL.tid_counter = 1; # ifdef THREAD_CREATE_NEEDS_STACK MY_POOL.default_stack_size = THREAD_CREATE_NEEDS_STACK; # endif /* The 'main' thread is thread 0. * It is detached (unjoinable) and immortal. */ MUTEX_INIT(&MY_POOL.main_thread.mutex); /* Head of the threads list */ MY_POOL.main_thread.next = &MY_POOL.main_thread; MY_POOL.main_thread.prev = &MY_POOL.main_thread; MY_POOL.main_thread.count = 1; /* Immortal */ MY_POOL.main_thread.interp = aTHX; MY_POOL.main_thread.state = PERL_ITHR_DETACHED; /* Detached */ MY_POOL.main_thread.stack_size = MY_POOL.default_stack_size; # ifdef WIN32 MY_POOL.main_thread.thr = GetCurrentThreadId(); # else MY_POOL.main_thread.thr = pthread_self(); # endif S_ithread_set(aTHX_ &MY_POOL.main_thread); MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex); #endif /* USE_ITHREADS */ }