tree b91009b28c758735acb9e3edfc5f39449fb2d151
parent ff6e752b6cecafc5f2ab3c0c3649db6008952470
author Fangrui Song <maskray@google.com> 1543278410 +0000
committer Fangrui Song <maskray@google.com> 1543278410 +0000

[Common] Threads: use function_ref instead of std::function

The benefits are:

a) Performance (very minor): it removes a heap allocation of the std::function constructor (template<class F> function(F f))
b) Clarity: it suggests that the callable's lifetime should end after the callee returns. Such callback is widely used in llvm. lld also uses it a lot.

Reviewers: ruiu, rnk, pcc

Reviewed By: ruiu

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D54813

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@347620 91177308-0d34-0410-b5e6-96231b3b80d8