1/*
2 * Copyright (c) 2011 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/*  Toy filtering. Allow system-wide or filtering on 4 PIDs */
30
31#include <mach/mach_types.h>
32#include <sys/types.h> /* NULL */
33// #include <libkern/libkern.h>
34
35#include <kperf/context.h>
36#include <kperf/filter.h>
37
38// Filter params... dodge for now
39#define NPIDS (4)
40int pid_list[NPIDS];
41
42// function to determine whether we should take a sample
43int
44kperf_filter_should_sample(struct kperf_context *context)
45{
46	int i, restricted = 0;
47
48	/* see if the pids are restricted */
49	for( i = 0; i < NPIDS; i++ )
50	{
51		if( context->cur_pid == pid_list[i] )
52			return 1;
53
54		if( pid_list[i] != -1 )
55			restricted = 1;
56	}
57
58	/* wasn't in the pid list, but something was */
59	if( restricted )
60		return 0;
61
62	/* not fitered, sample it */
63	return 1;
64}
65
66/* check whether pid filtering is enabled */
67int
68kperf_filter_on_pid(void)
69{
70	int i;
71
72	for( i = 0; i < NPIDS; i++ )
73		if( pid_list[i] != -1 )
74			return 1;
75
76	return 0;
77}
78
79/* create a list of pids to filter */
80void
81kperf_filter_pid_list( int *outcount, int **outv )
82{
83	int i, found = 0;
84
85	for( i = 0; i < NPIDS; i++ )
86		if( pid_list[i] != -1 )
87			found = 1;
88
89	if( !found )
90	{
91		*outcount = 0;
92		*outv = NULL;
93		return;
94	}
95
96	/* just return our list */
97	*outcount = NPIDS;
98	*outv = pid_list;
99}
100
101/* free a list we created*/
102void
103kperf_filter_free_pid_list( int *incount, int **inv )
104{
105	// no op
106	(void) incount;
107	(void) inv;
108}
109
110/* init the filters to nothing */
111void
112kperf_filter_init(void)
113{
114	int i;
115	for( i = 0; i < NPIDS; i++ )
116		pid_list[i] = -1;
117}
118