1 /* 2 * libjingle 3 * Copyright 2013, 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 28 #if !defined(__has_feature) || !__has_feature(objc_arc) 29 #error "This file requires ARC support." 30 #endif 31 32 #import "RTCSessionDescriptionSyncObserver.h" 33 34 #import "RTCSessionDescription.h" 35 36 @interface RTCSessionDescriptionSyncObserver () 37 38 // CondVar used to wait for, and signal arrival of, an SDP-related callback. 39 @property(nonatomic, strong) NSCondition* condition; 40 // Whether an SDP-related callback has fired; cleared before wait returns. 41 @property(atomic, assign) BOOL signaled; 42 43 @end 44 45 @implementation RTCSessionDescriptionSyncObserver 46 47 @synthesize error = _error; 48 @synthesize sessionDescription = _sessionDescription; 49 @synthesize success = _success; 50 @synthesize condition = _condition; 51 @synthesize signaled = _signaled; 52 53 - (id)init { 54 if ((self = [super init])) { 55 if (!(_condition = [[NSCondition alloc] init])) 56 self = nil; 57 } 58 return self; 59 } 60 61 - (void)signal { 62 self.signaled = YES; 63 [self.condition signal]; 64 } 65 66 - (void)wait { 67 [self.condition lock]; 68 if (!self.signaled) 69 [self.condition wait]; 70 self.signaled = NO; 71 [self.condition unlock]; 72 } 73 74 #pragma mark - RTCSessionDescriptionDelegate methods 75 - (void)peerConnection:(RTCPeerConnection*)peerConnection 76 didCreateSessionDescription:(RTCSessionDescription*)sdp 77 error:(NSError*)error { 78 [self.condition lock]; 79 if (error) { 80 self.success = NO; 81 self.error = error.description; 82 } else { 83 self.success = YES; 84 self.sessionDescription = sdp; 85 } 86 [self signal]; 87 [self.condition unlock]; 88 } 89 90 - (void)peerConnection:(RTCPeerConnection*)peerConnection 91 didSetSessionDescriptionWithError:(NSError*)error { 92 [self.condition lock]; 93 if (error) { 94 self.success = NO; 95 self.error = error.description; 96 } else { 97 self.success = YES; 98 } 99 [self signal]; 100 [self.condition unlock]; 101 } 102 103 @end 104