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Putil.c
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117 lines (102 loc) · 2.92 KB
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/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only.
* See the file usr/src/LICENSING.NOTICE in this distribution or
* http://www.opensolaris.org/license/ for details.
*/
#pragma ident "@(#)Putil.c 1.2 01/01/29 SMI"
#include <limits.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#include "Pcontrol.h"
#include "Putil.h"
/*
* Place the new element on the list prior to the existing element.
*/
void
list_link(void *new, void *existing)
{
list_t *p = new;
list_t *q = existing;
if (q) {
p->list_forw = q;
p->list_back = q->list_back;
q->list_back->list_forw = p;
q->list_back = p;
} else {
p->list_forw = p->list_back = p;
}
}
/*
* Unchain the specified element from a list.
*/
void
list_unlink(void *old)
{
list_t *p = old;
if (p->list_forw != p) {
p->list_back->list_forw = p->list_forw;
p->list_forw->list_back = p->list_back;
}
p->list_forw = p->list_back = p;
}
/*
* Routines to manipulate sigset_t, fltset_t, or sysset_t. These routines
* are provided as equivalents for the <sys/procfs.h> macros prfillset,
* premptyset, praddset, and prdelset. These functions are preferable
* because they are not macros which rely on using sizeof (*sp), and thus
* can be used to create common code to manipulate event sets. The set
* size must be passed explicitly, e.g. : prset_fill(&set, sizeof (set));
*/
void
prset_fill(void *sp, size_t size)
{
size_t i = size / sizeof (uint32_t);
while (i != 0)
((uint32_t *)sp)[--i] = (uint32_t)0xFFFFFFFF;
}
void
prset_empty(void *sp, size_t size)
{
size_t i = size / sizeof (uint32_t);
while (i != 0)
((uint32_t *)sp)[--i] = (uint32_t)0;
}
void
prset_add(void *sp, size_t size, uint_t flag)
{
if (flag - 1 < 32 * size / sizeof (uint32_t))
((uint32_t *)sp)[(flag - 1) / 32] |= 1U << ((flag - 1) % 32);
}
void
prset_del(void *sp, size_t size, uint_t flag)
{
if (flag - 1 < 32 * size / sizeof (uint32_t))
((uint32_t *)sp)[(flag - 1) / 32] &= ~(1U << ((flag - 1) % 32));
}
int
prset_ismember(void *sp, size_t size, uint_t flag)
{
return ((flag - 1 < 32 * size / sizeof (uint32_t)) &&
(((uint32_t *)sp)[(flag - 1) / 32] & (1U << ((flag - 1) % 32))));
}
/*
* Printf-style error reporting function. This is used to supplement the error
* return codes from various libproc functions with additional text. Since we
* are a library, and should not be spewing messages to stderr, we provide a
* default version of this function that does nothing, but by calling this
* function we allow the client program to define its own version of the
* function that will interpose on our empty default. This may be useful for
* clients that wish to display such messages to the user.
*/
/*ARGSUSED*/
/*PRINTFLIKE2*/
void
Perror_printf(struct ps_prochandle *P, const char *format, ...)
{
/* nothing to do here */
}