-/*
- * Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
+/* thr_lwp.c - wrappers around SunOS LWP threads */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2007 The OpenLDAP Foundation.
* All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted only
- * as authorized by the OpenLDAP Public License. A copy of this
- * license is available at http://www.OpenLDAP.org/license.html or
- * in file LICENSE in the top-level directory of the distribution.
+ * 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>.
*/
-/* thr_lwp.c - wrappers around SunOS LWP threads */
-
/* BUGS:
* - slurpd calls the get_stack/free_stack functions. Should be fixed, so
* they can become static.
*/
#include "portable.h"
-#include "ldap_pvt_thread.h"
#if defined( HAVE_LWP )
* SunOS LWP *
* *
*************/
+
+/* This implementation NEEDS WORK. It currently does not compile */
+
#include <stdio.h>
#include <ac/time.h>
#include <ac/socket.h>
-#include "lber.h"
-#include "ldap.h"
-#include "ldap_log.h"
+#include "ldap-int.h"
+
+#include "ldap_pvt_thread.h" /* Get the thread interface */
+#define LDAP_THREAD_IMPLEMENTATION
+#include "ldap_thr_debug.h" /* May rename the symbols defined below */
#include <lwp/lwp.h>
#include <lwp/stackdep.h>
* Initialize LWP by spinning of a schedular
*/
int
-ldap_pvt_thread_initialize( void )
+ldap_int_thread_initialize( void )
{
thread_t tid;
stkalign_t *stack;
return 0;
}
+int
+ldap_int_thread_destroy( void )
+{
+ /* need to destroy lwp_scheduler thread and clean up private
+ variables */
+ return 0;
+}
+
struct stackinfo {
int stk_inuse;
stkalign_t *stk_stack;
static struct stackinfo *stacks;
-stkalign_t * ldap_pvt_thread_get_stack( int *stacknop )
+static stkalign_t * ldap_int_thread_get_stack( int *stacknop )
{
int i;
if ( stacks == NULL ) {
- stacks = (struct stackinfo *) ch_calloc( 1, MAX_THREADS *
+ stacks = (struct stackinfo *) LDAP_CALLOC( 1, MAX_THREADS *
sizeof(struct stackinfo) );
+
+ if( stacks == NULL ) {
+ Debug( LDAP_DEBUG_ANY, "stacks allocation failed",
+ 0, 0, 0 );
+ return NULL;
+ }
}
for ( i = 0; i < MAX_THREADS; i++ ) {
}
if ( stacks[i].stk_stack == NULL ) {
- stacks[i].stk_stack = (stkalign_t *) malloc(
+ stacks[i].stk_stack = (stkalign_t *) LDAP_MALLOC(
(MAX_STACK / sizeof(stkalign_t) + 1 )
* sizeof(stkalign_t) );
+
+ if( stacks[i].stk_stack == NULL ) {
+ Debug( LDAP_DEBUG_ANY, "stack allocation failed",
+ 0, 0, 0 );
+ return( NULL );
+ }
}
*stacknop = i;
return( stacks[i].stk_stack + MAX_STACK / sizeof(stkalign_t) );
}
-void
-ldap_pvt_thread_free_stack( int stackno )
+static void
+ldap_int_thread_free_stack( int stackno )
{
if ( stackno < 0 || stackno > MAX_THREADS ) {
- Debug( LDAP_DEBUG_ANY, "free_stack of bogus stack %d",
+ Debug( LDAP_DEBUG_ANY, "free_stack of bogus stack %d\n",
stackno, 0, 0 );
}
{
(*func)( arg );
- ldap_pvt_thread_free_stack( stackno );
+ ldap_int_thread_free_stack( stackno );
}
int
stkalign_t *stack;
int stackno;
- if ( (stack = ldap_pvt_thread_get_stack( &stackno )) == NULL ) {
+ if ( (stack = ldap_int_thread_get_stack( &stackno )) == NULL ) {
return( -1 );
}
return( lwp_create( thread, lwp_create_stack, MINPRIO, 0,
lwp_destroy( SELF );
}
+unsigned int
+ldap_pvt_thread_sleep(
+ unsigned int interval
+)
+{
+ thread_t mylwp;
+ tl_t *t, *nt;
+ time_t now;
+
+
+ if ( lwp_self( &mylwp ) < 0 ) {
+ return -1;
+ }
+
+ time( &now );
+
+ mon_enter( &sglob->tsl_mon );
+
+ if ( sglob->tsl_list != NULL ) {
+ for ( t = sglob->tsl_list; t != NULL; t = t->tl_next ) {
+ if ( SAMETHREAD( t->tl_tid, mylwp )) {
+ /* We're already sleeping? */
+ t->tl_wake = now + interval;
+ mon_exit( &sglob->tsl_mon );
+ lwp_suspend( mylwp );
+ return 0;
+ }
+ }
+ }
+
+ nt = (tl_t *) LDAP_MALLOC( sizeof( tl_t ));
+
+ if( nt == NULL ) return -1;
+
+ nt->tl_next = sglob->tsl_list;
+ nt->tl_wake = now + interval;
+ nt->tl_tid = mylwp;
+ sglob->tsl_list = nt;
+
+ mon_exit( &sglob->tsl_mon );
+
+ lwp_suspend( mylwp );
+ return 0;
+}
+
+/*
+ * The lwp_scheduler thread periodically checks to see if any threads
+ * are due to be resumed. If there are, it resumes them. Otherwise,
+ * it computes the lesser of ( 1 second ) or ( the minimum time until
+ * a thread need to be resumed ) and puts itself to sleep for that amount
+ * of time.
+ */
+static void
+lwp_scheduler(
+ int stackno
+)
+{
+ time_t now, min;
+ struct timeval interval;
+ tl_t *t;
+
+ while ( !sglob->slurpd_shutdown ) {
+ mon_enter( &sglob->tsl_mon );
+
+ time( &now );
+ min = 0L;
+ if ( sglob->tsl_list != NULL ) {
+ for ( t = sglob->tsl_list; t != NULL; t = t->tl_next ) {
+ if (( t->tl_wake > 0L ) && ( t->tl_wake < now )) {
+ lwp_resume( t->tl_tid );
+ t->tl_wake = 0L;
+ }
+
+ if (( t->tl_wake > now ) && ( t->tl_wake < min )) {
+ min = t->tl_wake;
+ }
+ }
+ }
+
+ mon_exit( &sglob->tsl_mon );
+
+ interval.tv_usec = 0L;
+ if ( min == 0L ) {
+ interval.tv_sec = 1L;
+ } else {
+ interval.tv_sec = min;
+ }
+
+ lwp_sleep( &interval );
+ }
+
+ mon_enter( &sglob->tsl_mon );
+
+ for ( t = sglob->tsl_list; t != NULL; t = t->tl_next ) {
+ lwp_resume( t->tl_tid );
+ }
+
+ mon_exit( &sglob->tsl_mon );
+
+ free_stack( stackno );
+}
+
int
ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return )
{
int
ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond,
- ldap_pvt_thread_mutex_t *mutex )
+ ldap_pvt_thread_mutex_t *mutex )
{
if ( ! cond->lcv_created ) {
cv_create( &cond->lcv_cv, *mutex );
return( cv->lcv_created ? cv_broadcast( cv->lcv_cv ) : 0 );
}
+ldap_pvt_thread_t
+ldap_pvt_thread_self( void )
+{
+ thread_t mylwp;
+
+ lwp_self( &mylwp );
+
+ return mylwp;
+}
+
#endif /* HAVE_LWP */
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