From da77331cb740ad7d5f39dcf6d64025610ec40555 Mon Sep 17 00:00:00 2001 From: Matthew Bauer Date: Thu, 25 Jun 2020 17:20:29 -0400 Subject: [PATCH] Remove lazy lookup in getHome this seems to break in Musl/Static with: terminate called after throwing an instance of 'std::bad_function_call' what(): bad_function_call --- src/libutil/lazy.hh | 48 --------------------------------------------- src/libutil/util.cc | 6 +++--- 2 files changed, 3 insertions(+), 51 deletions(-) delete mode 100644 src/libutil/lazy.hh diff --git a/src/libutil/lazy.hh b/src/libutil/lazy.hh deleted file mode 100644 index d073e486c..000000000 --- a/src/libutil/lazy.hh +++ /dev/null @@ -1,48 +0,0 @@ -#include -#include -#include - -namespace nix { - -/* A helper class for lazily-initialized variables. - - Lazy var([]() { return value; }); - - declares a variable of type T that is initialized to 'value' (in a - thread-safe way) on first use, that is, when var() is first - called. If the initialiser code throws an exception, then all - subsequent calls to var() will rethrow that exception. */ -template -class Lazy -{ - - typedef std::function Init; - - Init init; - - std::once_flag done; - - T value; - - std::exception_ptr ex; - -public: - - Lazy(Init init) : init(init) - { } - - const T & operator () () - { - std::call_once(done, [&]() { - try { - value = init(); - } catch (...) { - ex = std::current_exception(); - } - }); - if (ex) std::rethrow_exception(ex); - return value; - } -}; - -} diff --git a/src/libutil/util.cc b/src/libutil/util.cc index 1268b146a..ebb1383f3 100644 --- a/src/libutil/util.cc +++ b/src/libutil/util.cc @@ -1,4 +1,3 @@ -#include "lazy.hh" #include "util.hh" #include "affinity.hh" #include "sync.hh" @@ -511,7 +510,8 @@ std::string getUserName() } -static Lazy getHome2([]() { +static Path getHome2() +{ auto homeDir = getEnv("HOME"); if (!homeDir) { std::vector buf(16384); @@ -523,7 +523,7 @@ static Lazy getHome2([]() { homeDir = pw->pw_dir; } return *homeDir; -}); +}; Path getHome() { return getHome2(); }