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e6db4c5a4e
Provide options to fail without blocking or to block up to a timeout. Provide options to specify the scope containing the lock so it can be released automatically at the end of a function, file, or process. Extend the RunCMake.file test with cases covering the file(LOCK) command usage and error cases.
112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2014 Ruslan Baratov
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmFileLockResult.h"
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#include <errno.h>
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cmFileLockResult cmFileLockResult::MakeOk()
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{
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return cmFileLockResult(OK, 0);
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}
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cmFileLockResult cmFileLockResult::MakeSystem()
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{
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#if defined(_WIN32)
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const Error lastError = GetLastError();
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#else
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const Error lastError = errno;
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#endif
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return cmFileLockResult(SYSTEM, lastError);
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}
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cmFileLockResult cmFileLockResult::MakeTimeout()
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{
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return cmFileLockResult(TIMEOUT, 0);
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}
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cmFileLockResult cmFileLockResult::MakeAlreadyLocked()
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{
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return cmFileLockResult(ALREADY_LOCKED, 0);
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}
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cmFileLockResult cmFileLockResult::MakeInternal()
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{
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return cmFileLockResult(INTERNAL, 0);
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}
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cmFileLockResult cmFileLockResult::MakeNoFunction()
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{
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return cmFileLockResult(NO_FUNCTION, 0);
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}
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bool cmFileLockResult::IsOk() const
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{
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return this->Type == OK;
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}
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std::string cmFileLockResult::GetOutputMessage() const
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{
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switch (this->Type)
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{
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case OK:
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return "0";
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case SYSTEM:
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#if defined(_WIN32)
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{
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char* errorText = NULL;
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// http://stackoverflow.com/a/455533/2288008
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DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_IGNORE_INSERTS;
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::FormatMessageA(
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flags,
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NULL,
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this->ErrorValue,
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPSTR)&errorText,
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0,
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NULL
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);
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if (errorText != NULL)
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{
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const std::string message = errorText;
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::LocalFree(errorText);
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return message;
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}
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else
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{
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return "Internal error (FormatMessageA failed)";
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}
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}
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#else
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return strerror(this->ErrorValue);
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#endif
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case TIMEOUT:
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return "Timeout reached";
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case ALREADY_LOCKED:
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return "File already locked";
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case NO_FUNCTION:
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return "'GUARD FUNCTION' not used in function definition";
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case INTERNAL:
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default:
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return "Internal error";
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}
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}
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cmFileLockResult::cmFileLockResult(ErrorType typeValue, Error errorValue):
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Type(typeValue), ErrorValue(errorValue)
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{
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}
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