Threads in the new ISO C Standard from 2011
Threads in the new ISO C Standard from 2011
Threads in the new ISO C Standard from 2011
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Atomic Exchange Macros<br />
These and <strong>the</strong> follow<strong>in</strong>g atomic operations are called functions <strong>in</strong> <strong>the</strong><br />
standard but are macros.<br />
A refers to an atomic type, e.g. _Atomic <strong>in</strong>t.<br />
C refers to <strong>the</strong> correspond<strong>in</strong>g non-atomic type, i.e. <strong>in</strong>t.<br />
The atomic exchange function writes a <strong>new</strong> value and returns <strong>the</strong> old<br />
value po<strong>in</strong>ted to by ptr.<br />
C atomic_exchange_explicit(volatile A* ptr, C value, memory_order order);<br />
C atomic_exchange(volatile A* ptr, C value);<br />
Jonas Skeppstedt (js@cs.lth.se) Lecture 6 2013 12 / 70