tree 69b83da579426a627305916b8ba188a60b42d020
parent 98001b2ad560d66a2354702684c0be36e5cbd500
author Kelvin Zhang <zhangkelvin@google.com> 1640032295 -0800
committer Kelvin Zhang <zhangkelvin@google.com> 1640207140 -0800

Add DEFER macro, similar to go's defer

DEFER macro lets you run a block of code when exit from current scope.
Example use case:
    1. Close a file descriptor when function returns
    2. Call fclose()/lz4stream_close() routines before return

While these cases can be covered with unique ptr or custom RAII object,
inventing a new type for each usecase is somewhat cumbersome. So added
this macro to help.

Test: th
Bug: 206729162

Change-Id: I05d3b5df1bc31a451ef9f6328633acc06d547e6e