зеркало из https://github.com/mozilla/gecko-dev.git
61 строка
1.9 KiB
Plaintext
61 строка
1.9 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsUserIdleServiceX.h"
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#include "nsObjCExceptions.h"
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#import <Foundation/Foundation.h>
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bool nsUserIdleServiceX::PollIdleTime(uint32_t* aIdleTime) {
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NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
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kern_return_t rval;
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mach_port_t masterPort;
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rval = IOMasterPort(kIOMasterPortDefault, &masterPort);
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if (rval != KERN_SUCCESS) return false;
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io_iterator_t hidItr;
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rval = IOServiceGetMatchingServices(
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masterPort, IOServiceMatching("IOHIDSystem"), &hidItr);
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if (rval != KERN_SUCCESS) return false;
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NS_ASSERTION(hidItr, "Our iterator is null, but it ought not to be!");
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io_registry_entry_t entry = IOIteratorNext(hidItr);
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NS_ASSERTION(entry, "Our IO Registry Entry is null, but it shouldn't be!");
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IOObjectRelease(hidItr);
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NSMutableDictionary* hidProps;
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rval = IORegistryEntryCreateCFProperties(
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entry, (CFMutableDictionaryRef*)&hidProps, kCFAllocatorDefault, 0);
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if (rval != KERN_SUCCESS) return false;
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NS_ASSERTION(hidProps, "HIDProperties is null, but no error was returned.");
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[hidProps autorelease];
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id idleObj = [hidProps objectForKey:@"HIDIdleTime"];
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NS_ASSERTION([idleObj isKindOfClass:[NSData class]] ||
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[idleObj isKindOfClass:[NSNumber class]],
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"What we got for the idle object is not what we expect!");
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uint64_t time;
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if ([idleObj isKindOfClass:[NSData class]])
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[idleObj getBytes:&time length:sizeof(time)];
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else
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time = [idleObj unsignedLongLongValue];
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IOObjectRelease(entry);
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// convert to ms from ns
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time /= 1000000;
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if (time > UINT32_MAX) // Overflow will occur
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return false;
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*aIdleTime = static_cast<uint32_t>(time);
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return true;
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NS_OBJC_END_TRY_BLOCK_RETURN(false);
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}
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