| /* |
| * libjingle |
| * Copyright 2007, Google Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| // Helper function for using Cocoa with Posix threading. |
| |
| #import <assert.h> |
| #import <Foundation/Foundation.h> |
| |
| #import "talk/base/maccocoathreadhelper.h" |
| |
| // A dummy thread object which essentially does nothing. |
| // This is used in InitCocoaMultiThreading method. |
| @interface DummyThreadObject : NSObject { |
| } |
| |
| + (void)dummyFunc:(NSObject*)obj; |
| |
| @end |
| |
| @implementation DummyThreadObject |
| |
| + (void)dummyFunc:(NSObject*)obj { |
| // nothing to do |
| } |
| |
| @end |
| |
| namespace talk_base { |
| |
| // Cocoa must be "put into multithreading mode" before Cocoa functionality can |
| // be used on POSIX threads. The way to do that is to spawn one thread that may |
| // immediately exit. |
| void InitCocoaMultiThreading() { |
| if ([NSThread isMultiThreaded] == NO) { |
| // The sole purpose of this autorelease pool is to avoid a console |
| // message on Leopard that tells us we're autoreleasing the thread |
| // with no autorelease pool in place; we can't set up an autorelease |
| // pool before this, because this is executed from an initializer, |
| // which is run before main. This means we leak an autorelease pool, |
| // and one thread, and if other objects are set up in initializers after |
| // this they'll be silently added to this pool and never released. |
| |
| // Doing NSAutoreleasePool* hack = [[NSAutoreleasePool alloc] init]; |
| // causes unused variable error. |
| NSAutoreleasePool* hack; |
| hack = [[NSAutoreleasePool alloc] init]; |
| [NSThread detachNewThreadSelector:@selector(dummyFunc:) |
| toTarget:[DummyThreadObject class] |
| withObject:nil]; |
| } |
| |
| assert([NSThread isMultiThreaded]); |
| } |
| |
| } // namespace talk_base |