[vlc-devel] [PATCH] Support for Http Dynamic Streaming

[Rémi Denis-Courmont]

Le 2014-05-29 13:48, Jonathan Thambidurai a écrit :
> The following is noted:
> -volatile was necessary because the compiler was optimizing out some
> memory accesses that were necessary because two threads were (safely)
> operating on the same data structure.  Ive reshuffled some code since
> that time, so it may not still occur, but shouldnt hurt.

This statement is logically absurd, self-contradictory.

By definition, volatile protects memory accesses against optimization 
within a single thread. This is necessary for such abnormal call flows 
as asynchronous signal handlers (or interrupts in kernel mode), long 
jumps and cooperative user context switches.

volatile has no defined semantics for concurrent access by different 
threads.

-- 
Rémi Denis-Courmont