1/* 2 * libjingle 3 * Copyright 2007, 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// Helper function for using Cocoa with Posix threading. 28 29#import <assert.h> 30#import <Foundation/Foundation.h> 31 32#import "talk/base/maccocoathreadhelper.h" 33 34namespace talk_base { 35 36// Cocoa must be "put into multithreading mode" before Cocoa functionality can 37// be used on POSIX threads. The way to do that is to spawn one thread that may 38// immediately exit. 39void InitCocoaMultiThreading() { 40 if ([NSThread isMultiThreaded] == NO) { 41 // The sole purpose of this autorelease pool is to avoid a console 42 // message on Leopard that tells us we're autoreleasing the thread 43 // with no autorelease pool in place; we can't set up an autorelease 44 // pool before this, because this is executed from an initializer, 45 // which is run before main. This means we leak an autorelease pool, 46 // and one thread, and if other objects are set up in initializers after 47 // this they'll be silently added to this pool and never released. 48 49 // Doing NSAutoreleasePool* hack = [[NSAutoreleasePool alloc] init]; 50 // causes unused variable error. 51 NSAutoreleasePool* hack; 52 hack = [[NSAutoreleasePool alloc] init]; 53 [NSThread detachNewThreadSelector:@selector(class) 54 toTarget:[NSObject class] 55 withObject:nil]; 56 } 57 58 assert([NSThread isMultiThreaded]); 59} 60 61} // namespace talk_base 62