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1/*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "ProfilerServer.h"
28
29#import "JSProfilerPrivate.h"
30#import "JSRetainPtr.h"
31
32#import <Foundation/Foundation.h>
33
34@interface ProfilerServer : NSObject {
35@private
36    NSString *_serverName;
37    unsigned _listenerCount;
38}
39+ (ProfilerServer *)sharedProfileServer;
40- (void)startProfiling;
41- (void)stopProfiling;
42@end
43
44@implementation ProfilerServer
45
46+ (ProfilerServer *)sharedProfileServer
47{
48    static ProfilerServer *sharedServer;
49    if (!sharedServer)
50        sharedServer = [[ProfilerServer alloc] init];
51    return sharedServer;
52}
53
54- (id)init
55{
56    if (!(self = [super init]))
57        return nil;
58
59    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
60
61    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
62    if ([defaults boolForKey:@"EnableJSProfiling"])
63        [self startProfiling];
64
65    // The catch-all notifications
66    [[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(startProfiling) name:@"ProfilerServerStartNotification" object:nil];
67    [[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(stopProfiling) name:@"ProfilerServerStopNotification" object:nil];
68
69    // The specific notifications
70    NSProcessInfo *processInfo = [NSProcessInfo processInfo];
71    _serverName = [[NSString alloc] initWithFormat:@"ProfilerServer-%d", [processInfo processIdentifier]];
72
73    [[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(startProfiling) name:[_serverName stringByAppendingString:@"-Start"] object:nil];
74    [[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(stopProfiling) name:[_serverName stringByAppendingString:@"-Stop"] object:nil];
75
76    [pool drain];
77
78    return self;
79}
80
81- (void)startProfiling
82{
83    if (++_listenerCount > 1)
84        return;
85    JSRetainPtr<JSStringRef> profileName(Adopt, JSStringCreateWithUTF8CString([_serverName UTF8String]));
86    JSStartProfiling(0, profileName.get());
87}
88
89- (void)stopProfiling
90{
91    if (!_listenerCount || --_listenerCount > 0)
92        return;
93    JSRetainPtr<JSStringRef> profileName(Adopt, JSStringCreateWithUTF8CString([_serverName UTF8String]));
94    JSEndProfiling(0, profileName.get());
95}
96
97@end
98
99namespace JSC {
100
101void startProfilerServerIfNeeded()
102{
103    [ProfilerServer sharedProfileServer];
104}
105
106} // namespace JSC
107