Grand Central Dispatch
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My talk on GCD at Cocoaheads Stockholm. Video of the talk: http://bambuser.com/channel/rasmus/broadcast/358572
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Grand Central Dispatch
- 1. Grand Central Dispatch Dispatch Dispatch
- 2. Work dispatch_block_t or dispatch_function_t dispatch_queue_t dispatch_source_t dispatch_group_t Queue
- 3. ^ { for ( int i = 0 ; i < something very large; i++) { do_heavy_work(); and_keep_doing_it(); } } dispatch_async (..., );
- 4. dispatch_async_f(..., ); function foo(void *context) { for ( int i = 0 ; i < something very large; i++) { do_heavy_work(); and_keep_doing_it(); } } NULL , &foo
- 5. ^ { for ( int i = 0 ; i < something very large; i++) { do_heavy_work(); sum += and_keep_doing_it(); } } dispatch_sync (..., ); __block int sum = 0 ; NSRunAlertPanel ( @"Found the sum!" , @"It's: %d" , @"OK" , nil , nil , sum);
- 6. Main queue Global queues dispatch_get_main_queue () dispatch_get_global_queue ( X , 0 ) DISPATCH_QUEUE_PRIORITY_LOW DISPATCH_QUEUE_PRIORITY_DEFAULT DISPATCH_QUEUE_PRIORITY_HIGH Custom queues dispatch_queue_create() serial concurrent serial
- 7. ^ { for ( int i = 0 ; i < something very large; i++) { do_heavy_work(); sum += and_keep_doing_it(); } } dispatch_async ( dispatch_get_global_queue ( 0 , 0 ) , ); __block int sum = 0 ; NSRunAlertPanel ( @"Found the sum!" , @"It's: %d" , @"OK" , nil , nil , sum);
- 8. ^ { for ( int i = 0 ; i < something very large; i++) { do_heavy_work(); sum += and_keep_doing_it(); } dispatch_async ( dispatch_get_main_queue () , ); } dispatch_async ( dispatch_get_global_queue ( 0 , 0 ) , ); __block int sum = 0 ; ^ { NSRunAlertPanel ( @"Found the sum!" , @"It's: %d" , @"OK" , nil , nil , sum); }
- 9. ^ { do_heavy_work(); sum += and_keep_doing_it(); } dispatch_queue_t global = dispatch_get_global_queue( 0 , 0 ); dispatch_apply (something very large, global, ); __block int sum = 0 ; NSRunAlertPanel ( @"Found the sum!" , @"It's: %d" , @"OK" , nil , nil , sum );
- 10. ^ { do_heavy_work(); sum += and_keep_doing_it(); } dispatch_queue_t global = dispatch_get_global_queue( 0 , 0 ); dispatch_apply (something very large, global, ); __block int sum = 0 ; NSRunAlertPanel ( @"Found the sum!" , @"It's: %d" , @"OK" , nil , nil , sum );
- 11. ^ { do_heavy_work(); sum += and_keep_doing_it(); } dispatch_queue_t global = dispatch_get_global_queue( 0 , 0 ); dispatch_group_t group = dispatch_group_create (); for ( int i = 0 ; i < something very large; i++) { dispatch_group_async (group, queue, ); } __block int sum = 0 ; dispatch_group_notify (group, queue, ); dispatch_release (group); NSRunAlertPanel ( @"Found the sum!" , @"It's: %d" , @"OK" , nil , nil , sum );
- 13. http://mikeash.com/?page=pyblog http://thirdcog.eu/pwcblocks/ http://thirdcog.eu/pwcblocks/ http://thirdcog.eu/pwcblocks/