August 2011
Intermediate to advanced
552 pages
23h 48m
English
Content preview from Advanced Mac OS X Programming: The Big Nerd Ranch GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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For the More Curious: The dispatch_debug() Function
Dispatch objects provide one more function we have yet to discuss. The dispatch_debug function logs debugging information about any dispatch object:
void dispatch_debug (dispatch_object_t object,
const char *message, ...);
In the released version of the library, dispatch_debug() logs to the system log rather than to the console.
The logged information is intended to assist developers of the libdispatch library and is only marginally useful to users of Grand Central Dispatch. For example, here is the output generated for several different kinds of dispatch objects:
com.bignerdranch.dispatch_debug: com.apple.root.default-priority[0x7fff71001af0] ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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