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44 lines
1.2 KiB
Objective-C
44 lines
1.2 KiB
Objective-C
//
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// ASDisplayNodeTestsHelper.m
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// AsyncDisplayKit
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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#import "ASDisplayNodeTestsHelper.h"
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#import <QuartzCore/QuartzCore.h>
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#import <libkern/OSAtomic.h>
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// Poll the condition 1000 times a second.
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static CFTimeInterval kSingleRunLoopTimeout = 0.001;
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// Time out after 30 seconds.
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static CFTimeInterval kTimeoutInterval = 30.0f;
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BOOL ASDisplayNodeRunRunLoopUntilBlockIsTrue(as_condition_block_t block)
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{
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CFTimeInterval timeoutDate = CACurrentMediaTime() + kTimeoutInterval;
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BOOL passed = NO;
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while (true) {
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OSMemoryBarrier();
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passed = block();
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OSMemoryBarrier();
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if (passed) {
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break;
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}
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CFTimeInterval now = CACurrentMediaTime();
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if (now > timeoutDate) {
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break;
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}
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// Run until the poll timeout or until timeoutDate, whichever is first.
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CFTimeInterval runLoopTimeout = MIN(kSingleRunLoopTimeout, timeoutDate - now);
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CFRunLoopRunInMode(kCFRunLoopDefaultMode, runLoopTimeout, true);
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}
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return passed;
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}
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