[PATCH] Add a lock() function in PassRegistry to speed up multi-thread synchronization.

[David Blaikie]

On Feb 27, 2015 7:52 AM, "Mehdi AMINI" <mehdi.amini at apple.com> wrote:
>
> ================
> Comment at: lib/IR/PassRegistry.cpp:52
> @@ +51,3 @@
> +  if (needMutex)
> +    Lock.unlock_shared();
> +  return PI;
> ----------------
> It is unfortunate to lose RAII, is there a good reason why
SmartScopedReader cannot take an extra parameter to be constructed without
locking? (like std::unique_lock())

(Agreed, and I provided a patch in my last reply that keeps RAII)

>
> http://reviews.llvm.org/D7787
>
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