1/*
2 *  Copyright 2007 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10// Helper function for using Cocoa with Posix threading.
11
12#import <assert.h>
13#import <Foundation/Foundation.h>
14
15#import "webrtc/base/maccocoathreadhelper.h"
16
17namespace rtc {
18
19// Cocoa must be "put into multithreading mode" before Cocoa functionality can
20// be used on POSIX threads. The way to do that is to spawn one thread that may
21// immediately exit.
22void InitCocoaMultiThreading() {
23  if ([NSThread isMultiThreaded] == NO) {
24    // The sole purpose of this autorelease pool is to avoid a console
25    // message on Leopard that tells us we're autoreleasing the thread
26    // with no autorelease pool in place.
27    // Doing NSAutoreleasePool* hack = [[NSAutoreleasePool alloc] init];
28    // causes unused variable error.
29    NSAutoreleasePool* hack;
30    hack = [[NSAutoreleasePool alloc] init];
31    [NSThread detachNewThreadSelector:@selector(class)
32                             toTarget:[NSObject class]
33                           withObject:nil];
34    [hack drain];
35  }
36
37  assert([NSThread isMultiThreaded]);
38}
39
40}  // namespace rtc
41