diff options
| -rw-r--r-- | src/libstore/references.cc | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/libstore/references.cc b/src/libstore/references.cc index 39c4970c6..3a07c1411 100644 --- a/src/libstore/references.cc +++ b/src/libstore/references.cc @@ -5,6 +5,7 @@ #include <map> #include <cstdlib> +#include <mutex> namespace nix { @@ -16,14 +17,13 @@ static unsigned int refLength = 32; /* characters */ static void search(const unsigned char * s, size_t len, StringSet & hashes, StringSet & seen) { - static bool initialised = false; + static std::once_flag initialised; static bool isBase32[256]; - if (!initialised) { + std::call_once(initialised, [](){ for (unsigned int i = 0; i < 256; ++i) isBase32[i] = false; for (unsigned int i = 0; i < base32Chars.size(); ++i) isBase32[(unsigned char) base32Chars[i]] = true; - initialised = true; - } + }); for (size_t i = 0; i + refLength <= len; ) { int j; |