#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
+/* Workaround for XSUB.h bug under WIN32 */
+#ifdef WIN32
+# undef setjmp
+# define setjmp(x) _setjmp(x)
+#endif
+#ifdef HAS_PPPORT_H
+# define NEED_PL_signals
+# define NEED_newRV_noinc
+# define NEED_sv_2pv_nolen
+# include "ppport.h"
+# include "threads.h"
+#endif
#ifdef USE_ITHREADS
-
#ifdef WIN32
-#include <windows.h>
-#include <win32thread.h>
+# include <windows.h>
+ /* Supposed to be in Winbase.h */
+# ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
+# define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
+# endif
+# include <win32thread.h>
#else
-#ifdef OS2
+# ifdef OS2
typedef perl_os_thread pthread_t;
-#else
-#include <pthread.h>
+# else
+# include <pthread.h>
+# endif
+# include <thread.h>
+# 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
-#include <thread.h>
-#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 /* OLD_PTHREADS_API */
+#if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM)
+# include <sys/param.h>
#endif
-
-
-
/* Values for 'state' member */
-#define PERL_ITHR_JOINABLE 0
-#define PERL_ITHR_DETACHED 1
-#define PERL_ITHR_FINISHED 4
-#define PERL_ITHR_JOINED 2
-
-typedef struct ithread_s {
- struct ithread_s *next; /* Next thread in the list */
- struct ithread_s *prev; /* Prev thread in the list */
- PerlInterpreter *interp; /* The threads interpreter */
- I32 tid; /* Threads module's thread id */
- perl_mutex mutex; /* Mutex for updating things in this struct */
- I32 count; /* How many SVs have a reference to us */
- signed char state; /* Are we detached ? */
- int gimme; /* Context of create */
- SV* init_function; /* Code to run */
- SV* params; /* Args to pass function */
+#define PERL_ITHR_JOINABLE 0
+#define PERL_ITHR_DETACHED 1
+#define PERL_ITHR_JOINED 2
+#define PERL_ITHR_FINISHED 4
+
+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; /* How many SVs have a reference to us */
+ int state; /* Detached, joined, finished, etc. */
+ int gimme; /* Context of create */
+ SV *init_function; /* Code to run */
+ SV *params; /* Args to pass function */
#ifdef WIN32
- DWORD thr; /* OS's idea if thread id */
- HANDLE handle; /* OS's waitable handle */
+ DWORD thr; /* OS's idea if thread id */
+ HANDLE handle; /* OS's waitable handle */
#else
- pthread_t thr; /* OS's handle for the thread */
+ pthread_t thr; /* OS's handle for the thread */
#endif
+ IV stack_size;
} ithread;
+
+/* Used by Perl interpreter for thread context switching */
#define MY_CXT_KEY "threads::_guts" XS_VERSION
typedef struct {
START_MY_CXT
-ithread *threads;
+/* Linked list of all threads */
+static ithread *threads;
-/* Macros to supply the aTHX_ in an embed.h like manner */
-#define ithread_join(thread) Perl_ithread_join(aTHX_ thread)
-#define ithread_DESTROY(thread) Perl_ithread_DESTROY(aTHX_ thread)
-#define ithread_CLONE(thread) Perl_ithread_CLONE(aTHX_ thread)
-#define ithread_detach(thread) Perl_ithread_detach(aTHX_ thread)
-#define ithread_tid(thread) ((thread)->tid)
-#define ithread_yield(thread) (YIELD);
+/* Protects the creation and destruction of threads*/
+static perl_mutex create_destruct_mutex;
-static perl_mutex create_destruct_mutex; /* protects the creation and destruction of threads*/
-
-I32 tid_counter = 0;
-I32 known_threads = 0;
-I32 active_threads = 0;
+static UV tid_counter = 0;
+static IV joinable_threads = 0;
+static IV running_threads = 0;
+static IV detached_threads = 0;
+#ifdef THREAD_CREATE_NEEDS_STACK
+static IV default_stack_size = THREAD_CREATE_NEEDS_STACK;
+#else
+static IV default_stack_size = 0;
+#endif
+static IV page_size = 0;
-void Perl_ithread_set (pTHX_ ithread* thread)
+/* Used by Perl interpreter for thread context switching */
+static void
+S_ithread_set(pTHX_ ithread *thread)
{
dMY_CXT;
MY_CXT.thread = thread;
}
-ithread* Perl_ithread_get (pTHX) {
+static ithread *
+S_ithread_get(pTHX)
+{
dMY_CXT;
- return MY_CXT.thread;
+ return (MY_CXT.thread);
}
-/* 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 held
+/* 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 held.
*/
-
static void
-S_ithread_clear(pTHX_ ithread* thread)
+S_ithread_clear(pTHX_ ithread *thread)
{
PerlInterpreter *interp;
+
assert(thread->state & PERL_ITHR_FINISHED &&
- (thread->state & PERL_ITHR_DETACHED ||
- thread->state & PERL_ITHR_JOINED));
+ thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED));
interp = thread->interp;
if (interp) {
- dTHXa(interp);
- ithread* current_thread;
-#ifdef OEMVS
- void *ptr;
-#endif
- PERL_SET_CONTEXT(interp);
- current_thread = Perl_ithread_get(aTHX);
- Perl_ithread_set(aTHX_ thread);
-
- SvREFCNT_dec(thread->params);
-
- thread->params = Nullsv;
- perl_destruct(interp);
- thread->interp = NULL;
+ dTHXa(interp);
+
+ PERL_SET_CONTEXT(interp);
+ S_ithread_set(aTHX_ thread);
+
+ SvREFCNT_dec(thread->params);
+ thread->params = Nullsv;
+
+ perl_destruct(interp);
+ thread->interp = NULL;
}
if (interp)
- perl_free(interp);
+ perl_free(interp);
+
PERL_SET_CONTEXT(aTHX);
}
-/*
- * free an ithread structure and any attached data if its count == 0
- */
-void
-Perl_ithread_destruct (pTHX_ ithread* thread, const char *why)
+/* Free an ithread structure and any attached data if its count == 0 */
+static void
+S_ithread_destruct(pTHX_ ithread *thread)
{
- MUTEX_LOCK(&thread->mutex);
- if (!thread->next) {
- MUTEX_UNLOCK(&thread->mutex);
- Perl_croak(aTHX_ "panic: destruct destroyed thread %p (%s)",thread, why);
- }
- if (thread->count != 0) {
- MUTEX_UNLOCK(&thread->mutex);
- return;
- }
- MUTEX_LOCK(&create_destruct_mutex);
- /* Remove from circular list of threads */
- if (thread->next == thread) {
- /* last one should never get here ? */
- threads = NULL;
- }
- else {
- thread->next->prev = thread->prev;
- thread->prev->next = thread->next;
- if (threads == thread) {
- threads = thread->next;
- }
- thread->next = NULL;
- thread->prev = NULL;
- }
- known_threads--;
- assert( known_threads >= 0 );
-#if 0
- Perl_warn(aTHX_ "destruct %d @ %p by %p now %d",
- thread->tid,thread->interp,aTHX, known_threads);
+#ifdef WIN32
+ HANDLE handle;
#endif
- MUTEX_UNLOCK(&create_destruct_mutex);
- /* Thread is now disowned */
- S_ithread_clear(aTHX_ thread);
- MUTEX_UNLOCK(&thread->mutex);
- MUTEX_DESTROY(&thread->mutex);
+ MUTEX_LOCK(&thread->mutex);
+
+ /* Thread is still in use */
+ if (thread->count != 0) {
+ MUTEX_UNLOCK(&thread->mutex);
+ return;
+ }
+
+ /* Main thread (0) is immortal and should never get here */
+ assert(thread->tid != 0);
+
+ /* Remove from circular list of threads */
+ MUTEX_LOCK(&create_destruct_mutex);
+ thread->next->prev = thread->prev;
+ thread->prev->next = thread->next;
+ thread->next = NULL;
+ thread->prev = NULL;
+ MUTEX_UNLOCK(&create_destruct_mutex);
+
+ /* Thread is now disowned */
+ 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 (thread->handle)
- CloseHandle(thread->handle);
- thread->handle = 0;
+ if (handle)
+ CloseHandle(handle);
#endif
- PerlMemShared_free(thread);
+
+ /* Call PerlMemShared_free() in the context of the "first" interpreter
+ * per http://www.nntp.perl.org/group/perl.perl5.porters/110772
+ */
+ aTHX = PL_curinterp;
+ PerlMemShared_free(thread);
}
+
+/* Called on exit */
int
Perl_ithread_hook(pTHX)
{
int veto_cleanup = 0;
MUTEX_LOCK(&create_destruct_mutex);
- if (aTHX == PL_curinterp && active_threads != 1) {
- if (ckWARN_d(WARN_THREADS))
- Perl_warn(aTHX_ "A thread exited while %" IVdf " threads were running",
- (IV)active_threads);
- veto_cleanup = 1;
+ if ((aTHX == PL_curinterp) &&
+ (running_threads || joinable_threads))
+ {
+ 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",
+ running_threads,
+ joinable_threads,
+ detached_threads);
+ }
+ veto_cleanup = 1;
}
MUTEX_UNLOCK(&create_destruct_mutex);
- return veto_cleanup;
+ return (veto_cleanup);
}
-void
-Perl_ithread_detach(pTHX_ ithread *thread)
-{
- MUTEX_LOCK(&thread->mutex);
- if (!(thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))) {
- thread->state |= PERL_ITHR_DETACHED;
-#ifdef WIN32
- CloseHandle(thread->handle);
- thread->handle = 0;
-#else
- PERL_THREAD_DETACH(thread->thr);
-#endif
- }
- if ((thread->state & PERL_ITHR_FINISHED) &&
- (thread->state & PERL_ITHR_DETACHED)) {
- MUTEX_UNLOCK(&thread->mutex);
- Perl_ithread_destruct(aTHX_ thread, "detach");
- }
- else {
- MUTEX_UNLOCK(&thread->mutex);
- }
-}
/* MAGIC (in mg.h sense) hooks */
int
ithread_mg_get(pTHX_ SV *sv, MAGIC *mg)
{
- ithread *thread = (ithread *) mg->mg_ptr;
+ ithread *thread = (ithread *)mg->mg_ptr;
SvIV_set(sv, PTR2IV(thread));
SvIOK_on(sv);
- return 0;
+ return (0);
}
int
ithread_mg_free(pTHX_ SV *sv, MAGIC *mg)
{
- ithread *thread = (ithread *) mg->mg_ptr;
+ ithread *thread = (ithread *)mg->mg_ptr;
+ int cleanup;
+
MUTEX_LOCK(&thread->mutex);
- thread->count--;
- if (thread->count == 0) {
- if(thread->state & PERL_ITHR_FINISHED &&
- (thread->state & PERL_ITHR_DETACHED ||
- thread->state & PERL_ITHR_JOINED))
- {
- MUTEX_UNLOCK(&thread->mutex);
- Perl_ithread_destruct(aTHX_ thread, "no reference");
- }
- else {
- MUTEX_UNLOCK(&thread->mutex);
- }
- }
- else {
- MUTEX_UNLOCK(&thread->mutex);
- }
- return 0;
+ cleanup = ((--thread->count == 0) &&
+ (thread->state & PERL_ITHR_FINISHED) &&
+ (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)));
+ MUTEX_UNLOCK(&thread->mutex);
+
+ if (cleanup)
+ S_ithread_destruct(aTHX_ thread);
+ return (0);
}
int
ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
{
- ithread *thread = (ithread *) mg->mg_ptr;
+ ithread *thread = (ithread *)mg->mg_ptr;
MUTEX_LOCK(&thread->mutex);
thread->count++;
MUTEX_UNLOCK(&thread->mutex);
- return 0;
+ return (0);
}
MGVTBL ithread_vtbl = {
- ithread_mg_get, /* get */
- 0, /* set */
- 0, /* len */
- 0, /* clear */
- ithread_mg_free, /* free */
- 0, /* copy */
- ithread_mg_dup /* dup */
+ ithread_mg_get, /* get */
+ 0, /* set */
+ 0, /* len */
+ 0, /* clear */
+ ithread_mg_free, /* free */
+ 0, /* copy */
+ ithread_mg_dup /* dup */
};
-/*
- * Starts executing the thread. Needs to clean up memory a tad better.
- * Passed as the C level function to run in the new thread
- */
+/* Provided default, minimum and rational stack sizes */
+static IV
+good_stack_size(pTHX_ IV stack_size)
+{
+ /* Use default stack size if no stack size specified */
+ if (! stack_size)
+ return (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 (page_size <= 0) {
+#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
+ SETERRNO(0, SS_NORMAL);
+# ifdef _SC_PAGESIZE
+ page_size = sysconf(_SC_PAGESIZE);
+# else
+ page_size = sysconf(_SC_MMAP_PAGE_SIZE);
+# endif
+ if ((long)page_size < 0) {
+ if (errno) {
+ SV * const error = get_sv("@", FALSE);
+ (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
+ page_size = getpagesize();
+# else
+# if defined(I_SYS_PARAM) && defined(PAGESIZE)
+ page_size = PAGESIZE;
+# else
+ page_size = 8192; /* A conservative default */
+# endif
+# endif
+ if (page_size <= 0)
+ Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)page_size);
+#endif
+ }
+ stack_size = ((stack_size + (page_size - 1)) / page_size) * page_size;
+ return (stack_size);
+}
+
+
+/* Starts executing the thread.
+ * Passed as the C level function to run in the new thread.
+ */
#ifdef WIN32
-THREAD_RET_TYPE
-Perl_ithread_run(LPVOID arg) {
+static THREAD_RET_TYPE
+S_ithread_run(LPVOID arg)
#else
-void*
-Perl_ithread_run(void * arg) {
+static void *
+S_ithread_run(void * arg)
#endif
- ithread* thread = (ithread*) arg;
- dTHXa(thread->interp);
- PERL_SET_CONTEXT(thread->interp);
- Perl_ithread_set(aTHX_ thread);
+{
+ ithread *thread = (ithread *)arg;
+ int cleanup;
+
+ dTHXa(thread->interp);
+ PERL_SET_CONTEXT(thread->interp);
+ S_ithread_set(aTHX_ thread);
#if 0
- /* Far from clear messing with ->thr child-side is a good idea */
- MUTEX_LOCK(&thread->mutex);
+ /* Far from clear messing with ->thr child-side is a good idea */
+ MUTEX_LOCK(&thread->mutex);
#ifdef WIN32
- thread->thr = GetCurrentThreadId();
+ thread->thr = GetCurrentThreadId();
#else
- thread->thr = pthread_self();
+ thread->thr = pthread_self();
#endif
- MUTEX_UNLOCK(&thread->mutex);
+ MUTEX_UNLOCK(&thread->mutex);
#endif
- PL_perl_destruct_level = 2;
-
- {
- AV* params = (AV*) SvRV(thread->params);
- I32 len = av_len(params)+1;
- int i;
- dSP;
- ENTER;
- SAVETMPS;
- PUSHMARK(SP);
- for(i = 0; i < len; i++) {
- XPUSHs(av_shift(params));
- }
- PUTBACK;
- len = call_sv(thread->init_function, thread->gimme|G_EVAL);
-
- SPAGAIN;
- for (i=len-1; i >= 0; i--) {
- SV *sv = POPs;
- av_store(params, i, SvREFCNT_inc(sv));
- }
- if (SvTRUE(ERRSV) && ckWARN_d(WARN_THREADS)) {
- Perl_warn(aTHX_ "thread failed to start: %" SVf, ERRSV);
- }
- FREETMPS;
- LEAVE;
- SvREFCNT_dec(thread->init_function);
- }
-
- PerlIO_flush((PerlIO*)NULL);
- MUTEX_LOCK(&thread->mutex);
- thread->state |= PERL_ITHR_FINISHED;
-
- if (thread->state & PERL_ITHR_DETACHED) {
- MUTEX_UNLOCK(&thread->mutex);
- Perl_ithread_destruct(aTHX_ thread, "detached finish");
- } else {
- MUTEX_UNLOCK(&thread->mutex);
- }
- MUTEX_LOCK(&create_destruct_mutex);
- active_threads--;
- assert( active_threads >= 0 );
- MUTEX_UNLOCK(&create_destruct_mutex);
+ PL_perl_destruct_level = 2;
+
+ {
+ AV *params = (AV *)SvRV(thread->params);
+ int len = (int)av_len(params)+1;
+ int ii;
+ int jmp_rc = 0;
+ I32 oldscope;
+
+ dJMPENV;
+
+ dSP;
+ ENTER;
+ SAVETMPS;
+
+ /* Put args on the stack */
+ PUSHMARK(SP);
+ for (ii=0; ii < len; ii++) {
+ XPUSHs(av_shift(params));
+ }
+ PUTBACK;
+
+ oldscope = PL_scopestack_ix;
+ JMPENV_PUSH(jmp_rc);
+ if (jmp_rc == 0) {
+ /* Run the specified function */
+ len = (int)call_sv(thread->init_function, thread->gimme|G_EVAL);
+ } else if (jmp_rc == 2) {
+ while (PL_scopestack_ix > oldscope) {
+ LEAVE;
+ }
+ }
+ JMPENV_POP;
+
+ /* 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) {
+ av_store(params, ii, SvREFCNT_inc(sv));
+ }
+ }
+
+ FREETMPS;
+ LEAVE;
+
+ /* Check for failure */
+ if (SvTRUE(ERRSV) && ckWARN_d(WARN_THREADS)) {
+ oldscope = PL_scopestack_ix;
+ JMPENV_PUSH(jmp_rc);
+ if (jmp_rc == 0) {
+ Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV);
+ } else if (jmp_rc == 2) {
+ while (PL_scopestack_ix > oldscope) {
+ LEAVE;
+ }
+ }
+ JMPENV_POP;
+ }
+
+ /* Release function ref */
+ SvREFCNT_dec(thread->init_function);
+ thread->init_function = Nullsv;
+ }
+
+ PerlIO_flush((PerlIO *)NULL);
+
+ MUTEX_LOCK(&thread->mutex);
+ /* Mark as finished */
+ thread->state |= PERL_ITHR_FINISHED;
+ /* Cleanup if detached */
+ cleanup = (thread->state & PERL_ITHR_DETACHED);
+ MUTEX_UNLOCK(&thread->mutex);
+
+ if (cleanup) {
+ MUTEX_LOCK(&create_destruct_mutex);
+ detached_threads--;
+ MUTEX_UNLOCK(&create_destruct_mutex);
+ S_ithread_destruct(aTHX_ thread);
+ } else {
+ MUTEX_LOCK(&create_destruct_mutex);
+ running_threads--;
+ joinable_threads++;
+ MUTEX_UNLOCK(&create_destruct_mutex);
+ }
#ifdef WIN32
- return (DWORD)0;
+ return ((DWORD)0);
#else
- return 0;
+ return (0);
#endif
}
-SV *
+
+/* Type conversion helper functions */
+static SV *
ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc)
{
SV *sv;
MAGIC *mg;
+
if (inc) {
- MUTEX_LOCK(&thread->mutex);
- thread->count++;
- MUTEX_UNLOCK(&thread->mutex);
+ MUTEX_LOCK(&thread->mutex);
+ thread->count++;
+ MUTEX_UNLOCK(&thread->mutex);
+ }
+
+ if (! obj) {
+ obj = newSV(0);
}
- 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);
+
+ 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;
+
+ return (obj);
}
-ithread *
+static ithread *
SV_to_ithread(pTHX_ SV *sv)
{
- if (SvROK(sv))
- {
- return INT2PTR(ithread*, SvIV(SvRV(sv)));
- }
- else
- {
- return Perl_ithread_get(aTHX);
- }
+ /* 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));
}
-/*
- * ithread->create(); ( aka ithread->new() )
- * Called in context of parent thread
- */
-SV *
-Perl_ithread_create(pTHX_ SV *obj, char* classname, SV* init_function, SV* params)
+/* threads->create()
+ * Called in context of parent thread.
+ */
+static SV *
+S_ithread_create(
+ pTHX_ SV *obj,
+ char *classname,
+ SV *init_function,
+ IV stack_size,
+ int gimme,
+ SV *params)
{
- ithread* thread;
- CLONE_PARAMS clone_param;
- ithread* current_thread = Perl_ithread_get(aTHX);
+ ithread *thread;
+ CLONE_PARAMS clone_param;
+ ithread *current_thread = S_ithread_get(aTHX);
- SV** tmps_tmp = PL_tmps_stack;
- I32 tmps_ix = PL_tmps_ix;
+ SV **tmps_tmp = PL_tmps_stack;
+ IV tmps_ix = PL_tmps_ix;
#ifndef WIN32
- int failure;
- const char* panic = NULL;
+ int rc_stack_size = 0;
+ int rc_thread_create = 0;
#endif
+ MUTEX_LOCK(&create_destruct_mutex);
- MUTEX_LOCK(&create_destruct_mutex);
- thread = (ithread *) PerlMemShared_malloc(sizeof(ithread));
- if (!thread) {
- MUTEX_UNLOCK(&create_destruct_mutex);
- PerlLIO_write(PerlIO_fileno(Perl_error_log),
- PL_no_mem, strlen(PL_no_mem));
- my_exit(1);
- }
- Zero(thread,1,ithread);
- thread->next = threads;
- thread->prev = threads->prev;
- threads->prev = thread;
- thread->prev->next = thread;
- /* Set count to 1 immediately in case thread exits before
- * we return to caller !
- */
- thread->count = 1;
- MUTEX_INIT(&thread->mutex);
- thread->tid = tid_counter++;
- thread->gimme = GIMME_V;
-
- /* "Clone" our interpreter into the thread's interpreter
- * This gives thread access to "static data" and code.
- */
-
- PerlIO_flush((PerlIO*)NULL);
- Perl_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 */
+ /* Allocate thread structure */
+ thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
+ if (!thread) {
+ MUTEX_UNLOCK(&create_destruct_mutex);
+ PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem));
+ my_exit(1);
+ }
+ Zero(thread, 1, ithread);
+
+ /* Add to threads list */
+ thread->next = threads;
+ thread->prev = threads->prev;
+ threads->prev = thread;
+ thread->prev->next = thread;
+
+ /* Set count to 1 immediately in case thread exits before
+ * we return to caller!
+ */
+ thread->count = 1;
+
+ MUTEX_INIT(&thread->mutex);
+ thread->tid = tid_counter++;
+ thread->stack_size = good_stack_size(aTHX_ stack_size);
+ thread->gimme = gimme;
+
+ /* "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 WIN32
- thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
+ thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
#else
- thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
+ 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.
- */
- {
- dTHXa(thread->interp);
-
- MY_CXT_CLONE;
-
- /* Here we remove END blocks since they should only run
- in the thread they are created
- */
- SvREFCNT_dec(PL_endav);
- PL_endav = newAV();
- clone_param.flags = 0;
- thread->init_function = sv_dup(init_function, &clone_param);
- if (SvREFCNT(thread->init_function) == 0) {
- SvREFCNT_inc(thread->init_function);
- }
-
-
-
- thread->params = sv_dup(params, &clone_param);
- SvREFCNT_inc(thread->params);
-
-
- /* 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
-
- One could argue that this fix should be 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(sv);
- SvREFCNT_dec(sv);
- }
- }
-
+ /* 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.
+ */
+ {
+ dTHXa(thread->interp);
+
+ MY_CXT_CLONE;
+
+ /* Here we remove END blocks since they should only run in the thread
+ * they are created
+ */
+ SvREFCNT_dec(PL_endav);
+ PL_endav = newAV();
+
+ if (SvPOK(init_function)) {
+ thread->init_function = newSV(0);
+ sv_copypv(thread->init_function, init_function);
+ } else {
+ clone_param.flags = 0;
+ thread->init_function = sv_dup(init_function, &clone_param);
+ if (SvREFCNT(thread->init_function) == 0) {
+ SvREFCNT_inc(thread->init_function);
+ }
+ }
- SvTEMP_off(thread->init_function);
- ptr_table_free(PL_ptr_table);
- PL_ptr_table = NULL;
- PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
- }
- Perl_ithread_set(aTHX_ current_thread);
- PERL_SET_CONTEXT(aTHX);
+ thread->params = sv_dup(params, &clone_param);
+ SvREFCNT_inc(thread->params);
+
+ /* 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.
+ *
+ * One could argue that this fix should be 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(sv);
+ SvREFCNT_dec(sv);
+ }
+ }
- /* Start the thread */
+ 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, 0, Perl_ithread_run,
- (LPVOID)thread, 0, &thread->thr);
+ 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) {
- attr_inited = 1;
- pthread_attr_init(&attr);
- }
+ {
+ 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
- PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
+ /* Threads start out joinable */
+ PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
# endif
-# ifdef THREAD_CREATE_NEEDS_STACK
- if(pthread_attr_setstacksize(&attr, THREAD_CREATE_NEEDS_STACK))
- panic = "panic: pthread_attr_setstacksize failed";
+
+# 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
-#ifdef OLD_PTHREADS_API
- failure
- = panic ? 1 : pthread_create( &thread->thr, attr,
- Perl_ithread_run, (void *)thread);
-#else
-# if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM)
- pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM );
+ /* 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
- failure
- = panic ? 1 : pthread_create( &thread->thr, &attr,
- Perl_ithread_run, (void *)thread);
+ }
+
+# 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
- known_threads++;
- if (
+
+ /* Check for errors */
#ifdef WIN32
- thread->handle == NULL
+ if (thread->handle == NULL) {
#else
- failure
+ if (rc_stack_size || rc_thread_create) {
#endif
- ) {
- MUTEX_UNLOCK(&create_destruct_mutex);
- sv_2mortal(params);
- Perl_ithread_destruct(aTHX_ thread, "create failed");
+ MUTEX_UNLOCK(&create_destruct_mutex);
+ sv_2mortal(params);
+ S_ithread_destruct(aTHX_ thread);
#ifndef WIN32
- if (panic)
- Perl_croak(aTHX_ panic);
+ 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 &PL_sv_undef;
- }
- active_threads++;
- MUTEX_UNLOCK(&create_destruct_mutex);
- sv_2mortal(params);
+ return (&PL_sv_undef);
+ }
- return ithread_to_SV(aTHX_ obj, thread, classname, FALSE);
-}
+ running_threads++;
+ MUTEX_UNLOCK(&create_destruct_mutex);
-SV*
-Perl_ithread_self (pTHX_ SV *obj, char* Class)
-{
- ithread *thread = Perl_ithread_get(aTHX);
- if (thread)
- return ithread_to_SV(aTHX_ obj, thread, Class, TRUE);
- else
- Perl_croak(aTHX_ "panic: cannot find thread data");
- return NULL; /* silence compiler warning */
+ sv_2mortal(params);
+
+ return (ithread_to_SV(aTHX_ obj, thread, classname, FALSE));
}
-/*
- * Joins the thread this code needs to take the returnvalue from the
- * call_sv and send it back
- */
+#endif /* USE_ITHREADS */
+
+
+MODULE = threads PACKAGE = threads PREFIX = ithread_
+PROTOTYPES: DISABLE
+
+#ifdef USE_ITHREADS
void
-Perl_ithread_CLONE(pTHX_ SV *obj)
-{
- if (SvROK(obj)) {
- ithread *thread = SV_to_ithread(aTHX_ obj);
- }
- else if (ckWARN_d(WARN_THREADS)) {
- Perl_warn(aTHX_ "CLONE %" SVf,obj);
- }
-}
+ithread_create(...)
+ PREINIT:
+ char *classname;
+ ithread *thread;
+ SV *function_to_call;
+ AV *params;
+ HV *specs;
+ IV stack_size;
+ int context;
+ char *str;
+ int idx;
+ int ii;
+ 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;
+ }
-AV*
-Perl_ithread_join(pTHX_ SV *obj)
-{
- ithread *thread = SV_to_ithread(aTHX_ obj);
- MUTEX_LOCK(&thread->mutex);
- if (thread->state & PERL_ITHR_DETACHED) {
- MUTEX_UNLOCK(&thread->mutex);
- Perl_croak(aTHX_ "Cannot join a detached thread");
- }
- else if (thread->state & PERL_ITHR_JOINED) {
- MUTEX_UNLOCK(&thread->mutex);
- Perl_croak(aTHX_ "Thread already joined");
- }
- else {
- AV* retparam;
+ if (sv_isobject(ST(0))) {
+ /* $thr->create() */
+ classname = HvNAME(SvSTASH(SvRV(ST(0))));
+ thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
+ stack_size = thread->stack_size;
+ } else {
+ /* threads->create() */
+ classname = (char *)SvPV_nolen(ST(0));
+ stack_size = default_stack_size;
+ }
+
+ function_to_call = ST(idx+1);
+
+ context = -1;
+ if (specs) {
+ /* stack_size */
+ if (hv_exists(specs, "stack", 5)) {
+ stack_size = SvIV(*hv_fetch(specs, "stack", 5, 0));
+ } else if (hv_exists(specs, "stacksize", 9)) {
+ stack_size = SvIV(*hv_fetch(specs, "stacksize", 9, 0));
+ } else if (hv_exists(specs, "stack_size", 10)) {
+ stack_size = SvIV(*hv_fetch(specs, "stack_size", 10, 0));
+ }
+
+ /* context */
+ if (hv_exists(specs, "context", 7)) {
+ str = (char *)SvPV_nolen(*hv_fetch(specs, "context", 7, 0));
+ switch (*str) {
+ case 'a':
+ case 'A':
+ 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 (hv_exists(specs, "array", 5)) {
+ if (SvTRUE(*hv_fetch(specs, "array", 5, 0))) {
+ context = G_ARRAY;
+ }
+ } else if (hv_exists(specs, "scalar", 6)) {
+ if (SvTRUE(*hv_fetch(specs, "scalar", 6, 0))) {
+ context = G_SCALAR;
+ }
+ } else if (hv_exists(specs, "void", 4)) {
+ if (SvTRUE(*hv_fetch(specs, "void", 4, 0))) {
+ context = G_VOID;
+ }
+ }
+ }
+ if (context == -1) {
+ context = GIMME_V; /* Implicit context */
+ } else {
+ context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID)));
+ }
+
+ /* Function args */
+ params = newAV();
+ if (items > 2) {
+ for (ii=2; ii < items ; ii++) {
+ av_push(params, SvREFCNT_inc(ST(idx+ii)));
+ }
+ }
+
+ /* Create thread */
+ ST(0) = sv_2mortal(S_ithread_create(aTHX_ Nullsv,
+ classname,
+ function_to_call,
+ stack_size,
+ context,
+ newRV_noinc((SV*)params)));
+ /* XSRETURN(1); - implied */
+
+
+void
+ithread_list(...)
+ PREINIT:
+ char *classname;
+ ithread *thread;
+ int list_context;
+ IV count = 0;
+ 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);
+
+ /* Walk through threads list */
+ MUTEX_LOCK(&create_destruct_mutex);
+ for (thread = threads->next;
+ thread != threads;
+ thread = thread->next)
+ {
+ /* Ignore detached or joined threads */
+ if (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)) {
+ continue;
+ }
+ /* Push object on stack if list context */
+ if (list_context) {
+ XPUSHs(sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)));
+ }
+ count++;
+ }
+ MUTEX_UNLOCK(&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 (SvROK(ST(0)))
+ Perl_croak(aTHX_ "Usage: threads->self()");
+ classname = (char *)SvPV_nolen(ST(0));
+
+ thread = S_ithread_get(aTHX);
+
+ ST(0) = sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
+ /* XSRETURN(1); - implied */
+
+
+void
+ithread_tid(...)
+ PREINIT:
+ ithread *thread;
+ CODE:
+ thread = SV_to_ithread(aTHX_ ST(0));
+ XST_mUV(0, thread->tid);
+ /* XSRETURN(1); - implied */
+
+
+void
+ithread_join(...)
+ PREINIT:
+ ithread *thread;
+ int join_err;
+ AV *params;
+ int len;
+ int ii;
#ifdef WIN32
- DWORD waitcode;
+ DWORD waitcode;
#else
- void *retval;
+ void *retval;
#endif
- MUTEX_UNLOCK(&thread->mutex);
+ PPCODE:
+ /* Object method only */
+ if (! sv_isobject(ST(0)))
+ Perl_croak(aTHX_ "Usage: $thr->join()");
+
+ /* Check if the thread is joinable */
+ thread = SV_to_ithread(aTHX_ ST(0));
+ MUTEX_LOCK(&thread->mutex);
+ join_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED));
+ MUTEX_UNLOCK(&thread->mutex);
+ if (join_err) {
+ if (join_err & PERL_ITHR_DETACHED) {
+ Perl_croak(aTHX_ "Cannot join a detached thread");
+ } else {
+ Perl_croak(aTHX_ "Thread already joined");
+ }
+ }
+
+ /* Join the thread */
#ifdef WIN32
- waitcode = WaitForSingleObject(thread->handle, INFINITE);
- CloseHandle(thread->handle);
- thread->handle = 0;
+ waitcode = WaitForSingleObject(thread->handle, INFINITE);
#else
- pthread_join(thread->thr,&retval);
+ pthread_join(thread->thr, &retval);
#endif
- MUTEX_LOCK(&thread->mutex);
-
- /* sv_dup over the args */
- {
- ithread* current_thread;
- AV* params = (AV*) SvRV(thread->params);
- PerlInterpreter *other_perl = thread->interp;
- CLONE_PARAMS clone_params;
- clone_params.stashes = newAV();
- clone_params.flags |= CLONEf_JOIN_IN;
- PL_ptr_table = ptr_table_new();
- current_thread = Perl_ithread_get(aTHX);
- Perl_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);
-#if 0
- {
- I32 len = av_len(params)+1;
- I32 i;
- for(i = 0; i < len; i++) {
- sv_dump(SvRV(AvARRAY(params)[i]));
- }
- }
-#endif
- retparam = (AV*) sv_dup((SV*)params, &clone_params);
-#if 0
- {
- I32 len = av_len(retparam)+1;
- I32 i;
- for(i = 0; i < len; i++) {
- sv_dump(SvRV(AvARRAY(retparam)[i]));
- }
- }
-#endif
- Perl_ithread_set(aTHX_ current_thread);
- SvREFCNT_dec(clone_params.stashes);
- SvREFCNT_inc(retparam);
- ptr_table_free(PL_ptr_table);
- PL_ptr_table = NULL;
-
- }
- /* We are finished with it */
- thread->state |= PERL_ITHR_JOINED;
- S_ithread_clear(aTHX_ thread);
- MUTEX_UNLOCK(&thread->mutex);
-
- return retparam;
- }
- return (AV*)NULL;
-}
+ MUTEX_LOCK(&thread->mutex);
+ /* Mark as joined */
+ thread->state |= PERL_ITHR_JOINED;
+
+ /* Get the return value from the call_sv */
+ {
+ AV *params_copy;
+ PerlInterpreter *other_perl;
+ CLONE_PARAMS clone_params;
+ ithread *current_thread;
+
+ params_copy = (AV *)SvRV(thread->params);
+ 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);
+ params = (AV *)sv_dup((SV*)params_copy, &clone_params);
+ S_ithread_set(aTHX_ current_thread);
+ SvREFCNT_dec(clone_params.stashes);
+ SvREFCNT_inc(params);
+ ptr_table_free(PL_ptr_table);
+ PL_ptr_table = NULL;
+ }
+
+ /* We are finished with the thread */
+ S_ithread_clear(aTHX_ thread);
+ MUTEX_UNLOCK(&thread->mutex);
+
+ MUTEX_LOCK(&create_destruct_mutex);
+ joinable_threads--;
+ MUTEX_UNLOCK(&create_destruct_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
-Perl_ithread_DESTROY(pTHX_ SV *sv)
-{
- ithread *thread = SV_to_ithread(aTHX_ sv);
- sv_unmagic(SvRV(sv),PERL_MAGIC_shared_scalar);
-}
+ithread_yield(...)
+ CODE:
+ YIELD;
-#endif /* USE_ITHREADS */
-MODULE = threads PACKAGE = threads PREFIX = ithread_
-PROTOTYPES: DISABLE
+void
+ithread_detach(...)
+ PREINIT:
+ ithread *thread;
+ int detach_err;
+ int cleanup;
+ CODE:
+ thread = SV_to_ithread(aTHX_ ST(0));
+ MUTEX_LOCK(&thread->mutex);
+
+ /* Check if the thread is detachable */
+ if ((detach_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))) {
+ MUTEX_UNLOCK(&thread->mutex);
+ if (detach_err & PERL_ITHR_DETACHED) {
+ Perl_croak(aTHX_ "Thread already detached");
+ } else {
+ Perl_croak(aTHX_ "Cannot detach a joined thread");
+ }
+ }
+
+ /* Detach the thread */
+ thread->state |= PERL_ITHR_DETACHED;
+#ifdef WIN32
+ /* Windows has no 'detach thread' function */
+#else
+ PERL_THREAD_DETACH(thread->thr);
+#endif
+ /* Cleanup if finished */
+ cleanup = (thread->state & PERL_ITHR_FINISHED);
+ MUTEX_UNLOCK(&thread->mutex);
+
+ MUTEX_LOCK(&create_destruct_mutex);
+ if (cleanup) {
+ joinable_threads--;
+ } else {
+ running_threads--;
+ detached_threads++;
+ }
+ MUTEX_UNLOCK(&create_destruct_mutex);
+
+ if (cleanup) {
+ S_ithread_destruct(aTHX_ thread);
+ }
-#ifdef USE_ITHREADS
void
-ithread_new (classname, function_to_call, ...)
-char * classname
-SV * function_to_call
-CODE:
-{
- AV* params = newAV();
- if (items > 2) {
- int i;
- for(i = 2; i < items ; i++) {
- av_push(params, SvREFCNT_inc(ST(i)));
- }
- }
- ST(0) = sv_2mortal(Perl_ithread_create(aTHX_ Nullsv, classname, function_to_call, newRV_noinc((SV*) params)));
- XSRETURN(1);
-}
+ithread_kill(...)
+ PREINIT:
+ ithread *thread;
+ char *sig_name;
+ IV signal;
+ 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 (! 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 = SV_to_ithread(aTHX_ ST(0));
+ MUTEX_LOCK(&thread->mutex);
+ {
+ dTHXa(thread->interp);
+ PL_psig_pend[signal]++;
+ PL_sig_pending = 1;
+ }
+ MUTEX_UNLOCK(&thread->mutex);
+
+ /* Return the thread to allow for method chaining */
+ ST(0) = ST(0);
+ /* XSRETURN(1); - implied */
+
void
-ithread_list(char *classname)
-PPCODE:
-{
- ithread *curr_thread;
- MUTEX_LOCK(&create_destruct_mutex);
- curr_thread = threads;
- if(curr_thread->tid != 0)
- XPUSHs( sv_2mortal(ithread_to_SV(aTHX_ NULL, curr_thread, classname, TRUE)));
- while(curr_thread) {
- curr_thread = curr_thread->next;
- if(curr_thread == threads)
- break;
- if(curr_thread->state & PERL_ITHR_DETACHED ||
- curr_thread->state & PERL_ITHR_JOINED)
- continue;
- XPUSHs( sv_2mortal(ithread_to_SV(aTHX_ NULL, curr_thread, classname, TRUE)));
- }
- MUTEX_UNLOCK(&create_destruct_mutex);
-}
+ithread_DESTROY(...)
+ CODE:
+ sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar);
void
-ithread_self(char *classname)
-CODE:
-{
- ST(0) = sv_2mortal(Perl_ithread_self(aTHX_ Nullsv,classname));
- XSRETURN(1);
-}
+ithread_equal(...)
+ PREINIT:
+ int are_equal = 0;
+ CODE:
+ /* 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 */
-int
-ithread_tid(ithread *thread)
void
-ithread_join(SV *obj)
-PPCODE:
-{
- AV* params = Perl_ithread_join(aTHX_ obj);
- int i;
- I32 len = AvFILL(params);
- for (i = 0; i <= len; i++) {
- SV* tmp = av_shift(params);
- XPUSHs(tmp);
- sv_2mortal(tmp);
- }
- SvREFCNT_dec(params);
-}
+ithread_object(...)
+ PREINIT:
+ char *classname;
+ UV tid;
+ ithread *thread;
+ int found = 0;
+ CODE:
+ /* Class method only */
+ if (SvROK(ST(0)))
+ Perl_croak(aTHX_ "Usage: threads->object($tid)");
+ classname = (char *)SvPV_nolen(ST(0));
+
+ if ((items < 2) || ! SvOK(ST(1))) {
+ XSRETURN_UNDEF;
+ }
+
+ /* threads->object($tid) */
+ tid = SvUV(ST(1));
+
+ /* Walk through threads list */
+ MUTEX_LOCK(&create_destruct_mutex);
+ for (thread = threads->next;
+ thread != threads;
+ thread = thread->next)
+ {
+ /* Look for TID, but ignore detached or joined threads */
+ if ((thread->tid != tid) ||
+ (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))
+ {
+ continue;
+ }
+ /* Put object on stack */
+ ST(0) = sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
+ found = 1;
+ break;
+ }
+ MUTEX_UNLOCK(&create_destruct_mutex);
+ if (! found) {
+ XSRETURN_UNDEF;
+ }
+ /* XSRETURN(1); - implied */
+
void
-yield(...)
-CODE:
-{
- YIELD;
-}
-
+ithread__handle(...);
+ PREINIT:
+ ithread *thread;
+ CODE:
+ thread = 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_detach(ithread *thread)
+ithread_get_stack_size(...)
+ PREINIT:
+ IV stack_size;
+ CODE:
+ if (sv_isobject(ST(0))) {
+ /* $thr->get_stack_size() */
+ ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
+ stack_size = thread->stack_size;
+ } else {
+ /* threads->get_stack_size() */
+ stack_size = default_stack_size;
+ }
+ XST_mIV(0, stack_size);
+ /* XSRETURN(1); - implied */
+
void
-ithread_DESTROY(SV *thread)
+ithread_set_stack_size(...)
+ PREINIT:
+ IV old_size;
+ CODE:
+ if (items != 2)
+ Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)");
+ if (sv_isobject(ST(0)))
+ Perl_croak(aTHX_ "Cannot change stack size of an existing thread");
+
+ old_size = default_stack_size;
+ default_stack_size = good_stack_size(aTHX_ SvIV(ST(1)));
+ XST_mIV(0, old_size);
+ /* XSRETURN(1); - implied */
#endif /* USE_ITHREADS */
+
BOOT:
{
#ifdef USE_ITHREADS
- MY_CXT_INIT;
- ithread* thread;
- PL_perl_destruct_level = 2;
- MUTEX_INIT(&create_destruct_mutex);
- MUTEX_LOCK(&create_destruct_mutex);
- PL_threadhook = &Perl_ithread_hook;
- thread = (ithread *) PerlMemShared_malloc(sizeof(ithread));
- if (!thread) {
- PerlLIO_write(PerlIO_fileno(Perl_error_log),
- PL_no_mem, strlen(PL_no_mem));
- my_exit(1);
- }
- Zero(thread,1,ithread);
- PL_perl_destruct_level = 2;
- MUTEX_INIT(&thread->mutex);
- threads = thread;
- thread->next = thread;
- thread->prev = thread;
- thread->interp = aTHX;
- thread->count = 1; /* Immortal. */
- thread->tid = tid_counter++;
- known_threads++;
- active_threads++;
- thread->state = PERL_ITHR_DETACHED;
-#ifdef WIN32
- thread->thr = GetCurrentThreadId();
-#else
- thread->thr = pthread_self();
-#endif
+ /* The 'main' thread is thread 0.
+ * It is detached (unjoinable) and immortal.
+ */
+
+ ithread *thread;
+ MY_CXT_INIT;
+
+ PL_perl_destruct_level = 2;
+ MUTEX_INIT(&create_destruct_mutex);
+ MUTEX_LOCK(&create_destruct_mutex);
+
+ PL_threadhook = &Perl_ithread_hook;
+
+ thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
+ if (! thread) {
+ PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem));
+ my_exit(1);
+ }
+ Zero(thread, 1, ithread);
- Perl_ithread_set(aTHX_ thread);
- MUTEX_UNLOCK(&create_destruct_mutex);
+ MUTEX_INIT(&thread->mutex);
+
+ thread->tid = tid_counter++; /* Thread 0 */
+
+ /* Head of the threads list */
+ threads = thread;
+ thread->next = thread;
+ thread->prev = thread;
+
+ thread->count = 1; /* Immortal */
+
+ thread->interp = aTHX;
+ thread->state = PERL_ITHR_DETACHED; /* Detached */
+ thread->stack_size = default_stack_size;
+# ifdef WIN32
+ thread->thr = GetCurrentThreadId();
+# else
+ thread->thr = pthread_self();
+# endif
+
+ S_ithread_set(aTHX_ thread);
+ MUTEX_UNLOCK(&create_destruct_mutex);
#endif /* USE_ITHREADS */
}
-
projects / p5sagit/p5-mst-13.2.git / blobdiff