diff options
Diffstat (limited to 'src/util.cpp')
| -rw-r--r-- | src/util.cpp | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/src/util.cpp b/src/util.cpp index a3e4b0acfb..80eed24ffd 100644 --- a/src/util.cpp +++ b/src/util.cpp @@ -1,5 +1,5 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2016 The Bitcoin Core developers +// Copyright (c) 2009-2017 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -72,6 +72,7 @@ #include <boost/algorithm/string/case_conv.hpp> // for to_lower() #include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith() +#include <boost/interprocess/sync/file_lock.hpp> #include <boost/program_options/detail/config_file.hpp> #include <boost/thread.hpp> #include <openssl/crypto.h> @@ -375,6 +376,27 @@ int LogPrintStr(const std::string &str) return ret; } +bool LockDirectory(const fs::path& directory, const std::string lockfile_name, bool probe_only) +{ + fs::path pathLockFile = directory / lockfile_name; + FILE* file = fsbridge::fopen(pathLockFile, "a"); // empty lock file; created if it doesn't exist. + if (file) fclose(file); + + try { + static std::map<std::string, boost::interprocess::file_lock> locks; + boost::interprocess::file_lock& lock = locks.emplace(pathLockFile.string(), pathLockFile.string().c_str()).first->second; + if (!lock.try_lock()) { + return false; + } + if (probe_only) { + lock.unlock(); + } + } catch (const boost::interprocess::interprocess_exception& e) { + return error("Error while attempting to lock directory %s: %s", directory.string(), e.what()); + } + return true; +} + /** Interpret string as boolean, for argument parsing */ static bool InterpretBool(const std::string& strValue) { |