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128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/* readw.c - deal with read waiters subsystem */
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/*
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* Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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/*
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* Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
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*
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* This work has beed deveolped for the OpenLDAP Foundation
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* in the hope that it may be useful to the Open Source community,
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* but WITHOUT ANY WARRANTY.
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*
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* Permission is granted to anyone to use this software for any purpose
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* on any computer system, and to alter it and redistribute it, subject
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* to the following restrictions:
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*
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* 1. The author and SysNet s.n.c. are not responsible for the consequences
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* of use of this software, no matter how awful, even if they arise from
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* flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either by
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* explicit claim or by omission. Since few users ever read sources,
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* credits should appear in the documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not be
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* misrepresented as being the original software. Since few users
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* ever read sources, credits should appear in the documentation.
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* SysNet s.n.c. cannot be responsible for the consequences of the
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* alterations.
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*
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* 4. This notice may not be removed or altered.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include "slap.h"
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#include "back-monitor.h"
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static int monitor_subsys_readw_update_internal( struct monitorinfo *mi, Entry *e, int rw );
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int
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monitor_subsys_readw_update(
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struct monitorinfo *mi,
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Entry *e
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)
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{
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return monitor_subsys_readw_update_internal( mi, e, 0 );
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}
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int
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monitor_subsys_writew_update(
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struct monitorinfo *mi,
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Entry *e
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)
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{
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return monitor_subsys_readw_update_internal( mi, e, 1 );
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}
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static int
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monitor_subsys_readw_update_internal(
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struct monitorinfo *mi,
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Entry *e,
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int rw
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)
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{
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Connection *c;
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int connindex;
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int nconns, nwritewaiters, nreadwaiters;
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Attribute *a;
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struct berval bv[2], *b = NULL;
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char buf[1024];
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char *str = NULL;
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int num = 0;
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assert( mi != NULL );
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assert( e != NULL );
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bv[1].bv_val = NULL;
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nconns = nwritewaiters = nreadwaiters = 0;
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for ( c = connection_first( &connindex );
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c != NULL;
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c = connection_next( c, &connindex ), nconns++ ) {
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if ( c->c_writewaiter ) {
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nwritewaiters++;
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}
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if ( c->c_currentber != NULL ) {
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nreadwaiters++;
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}
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}
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connection_done(c);
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switch ( rw ) {
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case 0:
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str = "read waiters";
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num = nreadwaiters;
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break;
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case 1:
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str = "write waiters";
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num = nwritewaiters;
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break;
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}
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snprintf( buf, sizeof( buf ), "%s=%d", str, num );
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if ( ( a = attr_find( e->e_attrs, monitor_ad_desc ) ) != NULL ) {
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for ( b = a->a_vals; b[0].bv_val != NULL; b++ ) {
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if ( strncmp( b[0].bv_val, str, strlen( str ) ) == 0 ) {
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free( b[0].bv_val );
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ber_str2bv( buf, 0, 1, b );
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break;
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}
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}
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}
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if ( b == NULL || b[0].bv_val == NULL ) {
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bv[0].bv_val = buf;
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bv[0].bv_len = strlen( buf );
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attr_merge( e, monitor_ad_desc, bv );
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}
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return( 0 );
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}
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