Swiftgram/Source/Details/ASTraceEvent.m
appleguy 465abb1ded [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses). (#1077)
* [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses)

With permission of the Facebook Open Source team, we are simplifying the Texture
license so that clients can rely on the Apache 2 terms that most of Texture is
already covered by. This means that code originally forked from AsyncDisplayKit
will be re-licensed from "BSD 3-clause + PATENTS v2" to Apache 2 without a
PATENTS file.

After getting confirmation that the updates to these core files look good, we'll
propagate this new license header to all files (in this same PR) and get sign-off
from all parties before landing.

* [License] Update all Texture source files to be pure Apache 2.

* Changelog entry for Apache 2 license update.

* Revert "[License] Update all Texture source files to be pure Apache 2."

This reverts commit ffa0fbbba9717d871dd16c4b07539f2f8208fc2b.

* [License] Update all Texture source files to be pure Apache 2, maintaining copyrights.

* [License] Update CONTRIBUTING, README, Podspec & Dangerfile.
2018-08-28 07:39:18 -07:00

68 lines
2.3 KiB
Objective-C

//
// ASTraceEvent.m
// Texture
//
// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
//
#import <AsyncDisplayKit/ASTraceEvent.h>
#import <QuartzCore/QuartzCore.h>
static NSString *const ASTraceEventThreadDescriptionKey = @"ASThreadTraceEventDescription";
@interface ASTraceEvent ()
@property (nonatomic, readonly) NSString *objectDescription;
@property (nonatomic, readonly) NSString *threadDescription;
@end
@implementation ASTraceEvent
- (instancetype)initWithBacktrace:(NSArray<NSString *> *)backtrace format:(NSString *)format arguments:(va_list)args
{
self = [super init];
if (self != nil) {
static NSTimeInterval refTime;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
refTime = CACurrentMediaTime();
});
// Create the format string passed to us.
_message = [[NSString alloc] initWithFormat:format arguments:args];
NSThread *thread = [NSThread currentThread];
NSString *threadDescription = thread.name;
if (threadDescription.length == 0) {
if ([thread isMainThread]) {
threadDescription = @"Main";
} else {
// If the bg thread has no name, we cache a 4-character ptr string to identify it by
// inside the thread dictionary.
NSMutableDictionary *threadDict = thread.threadDictionary;
threadDescription = threadDict[ASTraceEventThreadDescriptionKey];
if (threadDescription == nil) {
// Want these to be 4-chars to line up with "Main". It's possible that a collision could happen
// here but it's so unbelievably likely to impact development, the risk is acceptable.
NSString *ptrString = [NSString stringWithFormat:@"%p", thread];
threadDescription = [ptrString substringFromIndex:MAX(0, ptrString.length - 4)];
threadDict[ASTraceEventThreadDescriptionKey] = threadDescription;
}
}
}
_threadDescription = threadDescription;
_backtrace = backtrace;
_timestamp = CACurrentMediaTime() - refTime;
}
return self;
}
- (NSString *)description
{
return [NSString stringWithFormat:@"<(%@) t=%7.3f: %@>", _threadDescription, _timestamp, _message];
}
@end