/* $NetBSD: thr_posix.c,v 1.2 2021/08/14 16:14:56 christos Exp $ */
/* thr_posix.c - wrapper around posix and posixish thread implementations. */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2021 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: thr_posix.c,v 1.2 2021/08/14 16:14:56 christos Exp $");
#include "portable.h"
#if defined( HAVE_PTHREADS )
#ifdef __GLIBC__
#undef _FEATURES_H
#define _XOPEN_SOURCE 500 /* For pthread_setconcurrency() on glibc */
#endif
#include <ac/errno.h>
#ifdef REPLACE_BROKEN_YIELD
#ifndef HAVE_NANOSLEEP
#include <ac/socket.h>
#endif
#include <ac/time.h>
#endif
#include "ldap_pvt_thread.h" /* Get the thread interface */
#define LDAP_THREAD_IMPLEMENTATION
#define LDAP_THREAD_RDWR_IMPLEMENTATION
#include "ldap_thr_debug.h" /* May rename the symbols defined below */
#include <signal.h> /* For pthread_kill() */
extern int ldap_int_stackguard;
#if HAVE_PTHREADS < 6
# define LDAP_INT_THREAD_ATTR_DEFAULT pthread_attr_default
# define LDAP_INT_THREAD_CONDATTR_DEFAULT pthread_condattr_default
# define LDAP_INT_THREAD_MUTEXATTR_DEFAULT pthread_mutexattr_default
#else
# define LDAP_INT_THREAD_ATTR_DEFAULT NULL
# define LDAP_INT_THREAD_CONDATTR_DEFAULT NULL
# define LDAP_INT_THREAD_MUTEXATTR_DEFAULT NULL
#endif
#ifdef LDAP_THREAD_DEBUG
# if defined LDAP_INT_THREAD_MUTEXATTR /* May be defined in CPPFLAGS */
# elif defined HAVE_PTHREAD_KILL_OTHER_THREADS_NP
/* LinuxThreads hack */
# define LDAP_INT_THREAD_MUTEXATTR PTHREAD_MUTEX_ERRORCHECK_NP
# else
# define LDAP_INT_THREAD_MUTEXATTR PTHREAD_MUTEX_ERRORCHECK
# endif
static pthread_mutexattr_t mutex_attr;
# undef LDAP_INT_THREAD_MUTEXATTR_DEFAULT
# define LDAP_INT_THREAD_MUTEXATTR_DEFAULT &mutex_attr
#endif
static pthread_mutexattr_t mutex_attr_recursive;
#if HAVE_PTHREADS < 7
#define ERRVAL(val) ((val) < 0 ? errno : 0)
#else
#define ERRVAL(val) (val)
#endif
int
ldap_int_thread_initialize( void )
{
#ifdef LDAP_INT_THREAD_MUTEXATTR
pthread_mutexattr_init( &mutex_attr );
pthread_mutexattr_settype( &mutex_attr, LDAP_INT_THREAD_MUTEXATTR );
#endif
if (pthread_mutexattr_init(&mutex_attr_recursive))
return -1;
if (pthread_mutexattr_settype(&mutex_attr_recursive, PTHREAD_MUTEX_RECURSIVE))
return -1;
return 0;
}
int
ldap_int_thread_destroy( void )
{
#ifdef HAVE_PTHREAD_KILL_OTHER_THREADS_NP
/* LinuxThreads: kill clones */
pthread_kill_other_threads_np();
#endif
#ifdef LDAP_INT_THREAD_MUTEXATTR
pthread_mutexattr_destroy( &mutex_attr );
#endif
pthread_mutexattr_destroy( &mutex_attr_recursive );
return 0;
}
#ifdef LDAP_THREAD_HAVE_SETCONCURRENCY
int
ldap_pvt_thread_set_concurrency(int n)
{
#ifdef HAVE_PTHREAD_SETCONCURRENCY
return pthread_setconcurrency( n );
#elif defined(HAVE_THR_SETCONCURRENCY)
return thr_setconcurrency( n );
#else
return 0;
#endif
}
#endif
#ifdef LDAP_THREAD_HAVE_GETCONCURRENCY
int
ldap_pvt_thread_get_concurrency(void)
{
#ifdef HAVE_PTHREAD_GETCONCURRENCY
return pthread_getconcurrency();
#elif defined(HAVE_THR_GETCONCURRENCY)
return thr_getconcurrency();
#else
return 0;
#endif
}
#endif
/* detachstate appeared in Draft 6, but without manifest constants.
* in Draft 7 they were called PTHREAD_CREATE_UNDETACHED and ...DETACHED.
* in Draft 8 on, ...UNDETACHED became ...JOINABLE.
*/
#ifndef PTHREAD_CREATE_JOINABLE
#ifdef PTHREAD_CREATE_UNDETACHED
#define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED
#else
#define PTHREAD_CREATE_JOINABLE 0
#endif
#endif
#ifndef PTHREAD_CREATE_DETACHED
#define PTHREAD_CREATE_DETACHED 1
#endif
int
ldap_pvt_thread_create( ldap_pvt_thread_t * thread,
int detach,
void *(*start_routine)( void * ),
void *arg)
{
int rtn;
pthread_attr_t attr;
/* Always create the thread attrs, so we can set stacksize if we need to */
#if HAVE_PTHREADS > 5
pthread_attr_init(&attr);
#else
pthread_attr_create(&attr);
#endif
#ifdef LDAP_PVT_THREAD_SET_STACK_SIZE
/* this should be tunable */
pthread_attr_setstacksize( &attr, LDAP_PVT_THREAD_STACK_SIZE );
if ( ldap_int_stackguard )
pthread_attr_setguardsize( &attr, LDAP_PVT_THREAD_STACK_SIZE );
#endif
#if HAVE_PTHREADS > 5
detach = detach ? PTHREAD_CREATE_DETACHED : PTHREAD_CREATE_JOINABLE;
#if HAVE_PTHREADS == 6
pthread_attr_setdetachstate(&attr, &detach);
#else
pthread_attr_setdetachstate(&attr, detach);
#endif
#endif
#if HAVE_PTHREADS < 5
rtn = pthread_create( thread, attr, start_routine, arg );
#else
rtn = pthread_create( thread, &attr, start_routine, arg );
#endif
#if HAVE_PTHREADS > 5
pthread_attr_destroy(&attr);
#else
pthread_attr_delete(&attr);
if( detach ) {
pthread_detach( thread );
}
#endif
#if HAVE_PTHREADS < 7
if ( rtn < 0 ) rtn = errno;
#endif
return rtn;
}
void
ldap_pvt_thread_exit( void *retval )
{
pthread_exit( retval );
}
int
ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return )
{
#if HAVE_PTHREADS < 7
void *dummy;
if (thread_return==NULL)
thread_return=&dummy;
#endif
return ERRVAL( pthread_join( thread, thread_return ) );
}
int
ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo )
{
#if defined(HAVE_PTHREAD_KILL) && HAVE_PTHREADS > 4
/* MacOS 10.1 is detected as v10 but has no pthread_kill() */
return ERRVAL( pthread_kill( thread, signo ) );
#else
/* pthread package with DCE */
if (kill( getpid(), signo )<0)
return errno;
return 0;
#endif
}
int
ldap_pvt_thread_yield( void )
{
#ifdef REPLACE_BROKEN_YIELD
#ifdef HAVE_NANOSLEEP
struct timespec t = { 0, 0 };
nanosleep(&t, NULL);
#else
struct timeval tv = {0,0};
select( 0, NULL, NULL, NULL, &tv );
#endif
return 0;
#elif defined(HAVE_THR_YIELD)
thr_yield();
return 0;
#elif HAVE_PTHREADS == 10
return sched_yield();
#elif defined(_POSIX_THREAD_IS_GNU_PTH)
sched_yield();
return 0;
#elif HAVE_PTHREADS == 6
pthread_yield(NULL);
return 0;
#else
pthread_yield();
return 0;
#endif
}
int
ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond )
{
return ERRVAL( pthread_cond_init(
cond, LDAP_INT_THREAD_CONDATTR_DEFAULT ) );
}
int
ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cond )
{
return ERRVAL( pthread_cond_destroy( cond ) );
}
int
ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond )
{
return ERRVAL( pthread_cond_signal( cond ) );
}
int
ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond )
{
return ERRVAL( pthread_cond_broadcast( cond ) );
}
int
ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond,
ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_cond_wait( cond, mutex ) );
}
int
ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_mutex_init(
mutex, LDAP_INT_THREAD_MUTEXATTR_DEFAULT ) );
}
int
ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_mutex_destroy( mutex ) );
}
int
ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_mutex_lock( mutex ) );
}
int
ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_mutex_trylock( mutex ) );
}
int
ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_mutex_unlock( mutex ) );
}
int
ldap_pvt_thread_mutex_recursive_init( ldap_pvt_thread_mutex_t *mutex )
{
return ERRVAL( pthread_mutex_init( mutex, &mutex_attr_recursive ) );
}
ldap_pvt_thread_t ldap_pvt_thread_self( void )
{
return pthread_self();
}
int
ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *key )
{
return pthread_key_create( key, NULL );
}
int
ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key )
{
return pthread_key_delete( key );
}
int
ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data )
{
return pthread_setspecific( key, data );
}
int
ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data )
{
*data = pthread_getspecific( key );
return 0;
}
#ifdef LDAP_THREAD_HAVE_RDWR
#ifdef HAVE_PTHREAD_RWLOCK_DESTROY
int
ldap_pvt_thread_rdwr_init( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_init( rw, NULL ) );
}
int
ldap_pvt_thread_rdwr_destroy( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_destroy( rw ) );
}
int ldap_pvt_thread_rdwr_rlock( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_rdlock( rw ) );
}
int ldap_pvt_thread_rdwr_rtrylock( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_tryrdlock( rw ) );
}
int ldap_pvt_thread_rdwr_runlock( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_unlock( rw ) );
}
int ldap_pvt_thread_rdwr_wlock( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_wrlock( rw ) );
}
int ldap_pvt_thread_rdwr_wtrylock( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_trywrlock( rw ) );
}
int ldap_pvt_thread_rdwr_wunlock( ldap_pvt_thread_rdwr_t *rw )
{
return ERRVAL( pthread_rwlock_unlock( rw ) );
}
#endif /* HAVE_PTHREAD_RWLOCK_DESTROY */
#endif /* LDAP_THREAD_HAVE_RDWR */
#endif /* HAVE_PTHREADS */