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1/*
2 * libjingle
3 * Copyright 2012, Google Inc
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27#import "talk/base/maccocoasocketserver.h"
28
29#import <Foundation/Foundation.h>
30#import <AppKit/AppKit.h>
31#include <assert.h>
32
33#include "talk/base/scoped_autorelease_pool.h"
34
35// MacCocoaSocketServerHelper serves as a delegate to NSMachPort or a target for
36// a timeout.
37@interface MacCocoaSocketServerHelper : NSObject {
38  // This is a weak reference. This works fine since the
39  // talk_base::MacCocoaSocketServer owns this object.
40  talk_base::MacCocoaSocketServer* socketServer_;  // Weak.
41}
42@end
43
44@implementation MacCocoaSocketServerHelper
45- (id)initWithSocketServer:(talk_base::MacCocoaSocketServer*)ss {
46  self = [super init];
47  if (self) {
48    socketServer_ = ss;
49  }
50  return self;
51}
52
53- (void)timerFired:(NSTimer*)timer {
54  socketServer_->WakeUp();
55}
56@end
57
58namespace talk_base {
59
60MacCocoaSocketServer::MacCocoaSocketServer() {
61  helper_ = [[MacCocoaSocketServerHelper alloc] initWithSocketServer:this];
62  timer_ = nil;
63
64  // Initialize the shared NSApplication
65  [NSApplication sharedApplication];
66}
67
68MacCocoaSocketServer::~MacCocoaSocketServer() {
69  [timer_ invalidate];
70  [timer_ release];
71  [helper_ release];
72}
73
74bool MacCocoaSocketServer::Wait(int cms, bool process_io) {
75  talk_base::ScopedAutoreleasePool pool;
76  if (!process_io && cms == 0) {
77    // No op.
78    return true;
79  }
80
81  if (!process_io) {
82    // No way to listen to common modes and not get socket events, unless
83    // we disable each one's callbacks.
84    EnableSocketCallbacks(false);
85  }
86
87  if (kForever != cms) {
88    // Install a timer that fires wakeup after cms has elapsed.
89    timer_ =
90        [NSTimer scheduledTimerWithTimeInterval:cms / 1000.0
91                                         target:helper_
92                                       selector:@selector(timerFired:)
93                                       userInfo:nil
94                                        repeats:NO];
95    [timer_ retain];
96  }
97
98  // Run until WakeUp is called, which will call stop and exit this loop.
99  [NSApp run];
100
101  if (!process_io) {
102    // Reenable them.  Hopefully this won't cause spurious callbacks or
103    // missing ones while they were disabled.
104    EnableSocketCallbacks(true);
105  }
106
107  return true;
108}
109
110void MacCocoaSocketServer::WakeUp() {
111  // Timer has either fired or shortcutted.
112  [timer_ invalidate];
113  [timer_ release];
114  timer_ = nil;
115  [NSApp stop:nil];
116
117  // NSApp stop only exits after finishing processing of the
118  // current event.  Since we're potentially in a timer callback
119  //  and not an NSEvent handler, we need to trigger a dummy one
120  // and turn the loop over.  We may be able to skip this if we're
121  // on the ss' thread and not inside the app loop already.
122  NSEvent *event = [NSEvent otherEventWithType:NSApplicationDefined
123                                      location:NSMakePoint(0,0)
124                                 modifierFlags:0
125                                     timestamp:0
126                                  windowNumber:0
127                                       context:nil
128                                       subtype:1
129                                         data1:1
130                                         data2:1];
131  [NSApp postEvent:event atStart:YES];
132}
133
134}  // namespace talk_base
135