1999-01-17 23:46:19 +08:00
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/*
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* Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted only
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* as authorized by the OpenLDAP Public License. A copy of this
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* license is available at http://www.OpenLDAP.org/license.html or
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* in file LICENSE in the top-level directory of the distribution.
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*/
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/* thr_lwp.c - wrappers around SunOS LWP threads */
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1999-01-15 22:54:25 +08:00
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/* BUGS:
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* - slurpd calls the get_stack/free_stack functions. Should be fixed, so
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* they can become static.
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*/
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#include "portable.h"
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#include "ldap_pvt_thread.h"
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#if defined( HAVE_LWP )
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/*************
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* *
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* SunOS LWP *
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* *
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*************/
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#include <stdio.h>
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#include <ac/time.h>
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#include <ac/socket.h>
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#include "lber.h"
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#include "ldap.h"
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#include "ldap_log.h"
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#include <lwp/lwp.h>
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#include <lwp/stackdep.h>
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#define MAX_STACK 51200
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#define MAX_THREADS 20
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struct stackinfo {
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int stk_inuse;
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stkalign_t *stk_stack;
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};
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static struct stackinfo *stacks;
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stkalign_t * ldap_pvt_thread_get_stack( int *stacknop )
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{
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int i;
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if ( stacks == NULL ) {
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stacks = (struct stackinfo *) ch_calloc( 1, MAX_THREADS *
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sizeof(struct stackinfo) );
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}
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for ( i = 0; i < MAX_THREADS; i++ ) {
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if ( stacks[i].stk_inuse == 0 ) {
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break;
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}
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}
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if ( i == MAX_THREADS ) {
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Debug( LDAP_DEBUG_ANY,
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"no more stacks (max %d) - increase MAX_THREADS for more",
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MAX_THREADS, 0, 0 );
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return( NULL );
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}
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if ( stacks[i].stk_stack == NULL ) {
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stacks[i].stk_stack = (stkalign_t *) malloc(
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(MAX_STACK / sizeof(stkalign_t) + 1 )
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* sizeof(stkalign_t) );
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}
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*stacknop = i;
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stacks[i].stk_inuse = 1;
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return( stacks[i].stk_stack + MAX_STACK / sizeof(stkalign_t) );
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}
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void
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ldap_pvt_thread_free_stack( int stackno )
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{
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if ( stackno < 0 || stackno > MAX_THREADS ) {
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Debug( LDAP_DEBUG_ANY, "free_stack of bogus stack %d",
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stackno, 0, 0 );
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}
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stacks[stackno].stk_inuse = 0;
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}
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static void
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lwp_create_stack( void *(*func)(), void *arg, int stackno )
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{
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(*func)( arg );
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ldap_pvt_thread_free_stack( stackno );
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}
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int
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ldap_pvt_thread_create( ldap_pvt_thread_t * thread,
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ldap_pvt_thread_attr_t *attr,
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void *(*start_routine)( void *), void *arg)
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{
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stkalign_t *stack;
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int stackno;
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if ( (stack = ldap_pvt_thread_get_stack( &stackno )) == NULL ) {
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return( -1 );
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}
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return( lwp_create( thread, lwp_create_stack, MINPRIO, 0,
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stack, 3, start_routine, arg, stackno ) );
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}
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void
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ldap_pvt_thread_exit( void *retval )
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{
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lwp_destroy( SELF );
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}
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int
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ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return )
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{
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lwp_join( thread );
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return 0;
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}
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int
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ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo )
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{
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return 0;
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}
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int
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ldap_pvt_thread_yield( void )
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{
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lwp_yield( SELF );
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return 0;
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}
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int
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ldap_pvt_thread_attr_init( ldap_pvt_thread_attr_t *attr )
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{
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*attr = 0;
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return( 0 );
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}
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int
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ldap_pvt_thread_attr_destroy( ldap_pvt_thread_attr_t *attr )
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{
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return( 0 );
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}
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int
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ldap_pvt_thread_attr_setdetachstate( ldap_pvt_thread_attr_t *attr, int dstate )
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{
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*attr = dstate;
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return( 0 );
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}
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int
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ldap_pvt_thread_attr_getdetachstate( pthread_attr_t *attr, int *detachstate )
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{
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*detachstate = *attr;
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return( 0 );
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}
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int
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ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond,
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ldap_pvt_thread_condattr_t *attr )
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{
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/*
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* lwp cv_create requires the monitor id be passed in
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* when the cv is created, pthreads passes it when the
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* condition is waited for. so, we fake the creation
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* here and actually do it when the cv is waited for
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* later.
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*/
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cond->lcv_created = 0;
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return( 0 );
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}
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int
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ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond )
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{
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return( cond->lcv_created ? cv_notify( cv->lcv_cv ) : 0 );
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}
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int
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ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond,
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ldap_pvt_thread_mutex_t *mutex )
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{
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if ( ! cond->lcv_created ) {
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cv_create( &cond->lcv_cv, *mutex );
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cond->lcv_created = 1;
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}
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return( cv_wait( cond->lcv_cv ) );
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}
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int
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ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex,
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ldap_pvt_thread_mutexattr_t *attr )
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{
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return( mon_create( mutex ) );
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}
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int
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ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex )
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{
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return( mon_destroy( *mutex ) );
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}
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int
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ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex )
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{
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return( mon_enter( *mutex ) );
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}
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int
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ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex )
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{
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return( mon_exit( *mutex ) );
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}
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int
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ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mp )
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{
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return( mon_cond_enter( *mp ) );
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}
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int
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ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cv )
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{
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return( cv->lcv_created ? cv_destroy( cv->lcv_cv ) : 0 );
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}
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int
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ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cv )
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{
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return( cv->lcv_created ? cv_broadcast( cv->lcv_cv ) : 0 );
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}
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#endif /* HAVE_LWP */
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