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NSString *const PSPDFApplicationDidReceiveMemoryWarningNotification = @"PSPDFApplicationDidReceiveMemoryWarningNotification"; | |
// Test with sudo memory_pressure -l critical. Don't forget to re-set afterwards! | |
__attribute__((constructor)) static void PSPDFInstallLowMemoryNotificationWarningMac(void) { | |
static dispatch_source_t source; | |
static dispatch_once_t onceToken; | |
dispatch_once(&onceToken, ^{ | |
source = dispatch_source_create(DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, 0, DISPATCH_MEMORYPRESSURE_WARN|DISPATCH_MEMORYPRESSURE_CRITICAL, dispatch_get_main_queue()); | |
dispatch_source_set_event_handler(source, ^{ | |
dispatch_source_memorypressure_flags_t pressureLevel = dispatch_source_get_data(source); | |
[NSNotificationCenter.defaultCenter postNotificationName:PSPDFApplicationDidReceiveMemoryWarningNotification object:nil userInfo:@{@"pressure": @(pressureLevel)}]; | |
}); | |
dispatch_resume(source); | |
}); | |
} |
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