diff options
Diffstat (limited to 'Source/cmSystemTools.cxx')
| -rw-r--r-- | Source/cmSystemTools.cxx | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx index 41c7509..ff05975 100644 --- a/Source/cmSystemTools.cxx +++ b/Source/cmSystemTools.cxx @@ -864,6 +864,44 @@ bool cmSystemTools::CopyFileIfDifferent(const char* source, } //---------------------------------------------------------------------------- +#ifdef _WIN32 +cmSystemTools::WindowsFileRetry cmSystemTools::GetWindowsFileRetry() +{ + static WindowsFileRetry retry = {0,0}; + if(!retry.Count) + { + unsigned int data[2] = {0,0}; + HKEY const keys[2] = {HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE}; + wchar_t const* const values[2] = {L"FilesystemRetryCount", + L"FilesystemRetryDelay"}; + for(int k=0; k < 2; ++k) + { + HKEY hKey; + if(RegOpenKeyExW(keys[k], L"Software\\Kitware\\CMake\\Config", + 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) + { + for(int v=0; v < 2; ++v) + { + DWORD dwData, dwType, dwSize = 4; + if(!data[v] && + RegQueryValueExW(hKey, values[v], 0, &dwType, (BYTE *)&dwData, + &dwSize) == ERROR_SUCCESS && + dwType == REG_DWORD && dwSize == 4) + { + data[v] = static_cast<unsigned int>(dwData); + } + } + RegCloseKey(hKey); + } + } + retry.Count = data[0]? data[0] : 5; + retry.Delay = data[1]? data[1] : 500; + } + return retry; +} +#endif + +//---------------------------------------------------------------------------- bool cmSystemTools::RenameFile(const char* oldname, const char* newname) { #ifdef _WIN32 @@ -874,10 +912,10 @@ bool cmSystemTools::RenameFile(const char* oldname, const char* newname) fails then remove the read-only attribute from any existing destination. Try multiple times since we may be racing against another process creating/opening the destination file just before our MoveFileEx. */ - int tries = 5; + WindowsFileRetry retry = cmSystemTools::GetWindowsFileRetry(); while(!MoveFileExW(cmsys::Encoding::ToWide(oldname).c_str(), cmsys::Encoding::ToWide(newname).c_str(), - MOVEFILE_REPLACE_EXISTING) && --tries) + MOVEFILE_REPLACE_EXISTING) && --retry.Count) { // Try again only if failure was due to access permissions. if(GetLastError() != ERROR_ACCESS_DENIED) @@ -896,10 +934,10 @@ bool cmSystemTools::RenameFile(const char* oldname, const char* newname) else { // The file may be temporarily in use so wait a bit. - cmSystemTools::Delay(100); + cmSystemTools::Delay(retry.Delay); } } - return tries > 0; + return retry.Count > 0; #else /* On UNIX we have an OS-provided call to do this atomically. */ return rename(oldname, newname) == 0; |