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refs #777 Utilities for reading/writing files while holding a QLockFile.

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This commit is contained in:
Mathew Sutcliffe
2016-10-17 21:31:33 +01:00
committed by Klaus Basan
parent cf9b6f039c
commit 7f422eb3e4
2 changed files with 29 additions and 0 deletions
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20
src/blackmisc/fileutils.cpp
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@@ -17,6 +17,7 @@
#include <QFlags> #include <QFlags>
#include <QIODevice> #include <QIODevice>
#include <QList> #include <QList>
#include <QLockFile>
#include <QTextStream> #include <QTextStream>
#include <QtGlobal> #include <QtGlobal>
#include <algorithm> #include <algorithm>
@@ -48,6 +49,13 @@ namespace BlackMisc
return true; return true;
} }
bool CFileUtils::writeStringToLockedFile(const QString &content, const QString &fileNameAndPath)
{
QLockFile lock(fileNameAndPath + ".lock");
lock.lock();
return writeStringToFile(content, fileNameAndPath);
}
QString CFileUtils::readFileToString(const QString &fileNameAndPath) QString CFileUtils::readFileToString(const QString &fileNameAndPath)
{ {
QFile file(fileNameAndPath); QFile file(fileNameAndPath);
@@ -58,11 +66,23 @@ namespace BlackMisc
return content; return content;
} }
QString CFileUtils::readLockedFileToString(const QString &fileNameAndPath)
{
QLockFile lock(fileNameAndPath + ".lock");
lock.lock();
return readFileToString(fileNameAndPath);
}
QString CFileUtils::readFileToString(const QString &filePath, const QString &fileName) QString CFileUtils::readFileToString(const QString &filePath, const QString &fileName)
{ {
return readFileToString(appendFilePaths(filePath, fileName)); return readFileToString(appendFilePaths(filePath, fileName));
} }
QString CFileUtils::readLockedFileToString(const QString &filePath, const QString &fileName)
{
return readLockedFileToString(appendFilePaths(filePath, fileName));
}
bool CFileUtils::writeStringToFileInBackground(const QString &content, const QString &fileNameAndPath) bool CFileUtils::writeStringToFileInBackground(const QString &content, const QString &fileNameAndPath)
{ {
if (fileNameAndPath.isEmpty()) { return false; } if (fileNameAndPath.isEmpty()) { return false; }

9
src/blackmisc/fileutils.h
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@@ -41,12 +41,21 @@ namespace BlackMisc
//! Write string to text file //! Write string to text file
static bool writeStringToFile(const QString &content, const QString &fileNameAndPath); static bool writeStringToFile(const QString &content, const QString &fileNameAndPath);
//! Write string to file, with a lock so two applications can't access at the same time
static bool writeStringToLockedFile(const QString &content, const QString &fileNameAndPath);
//! Read file into string //! Read file into string
static QString readFileToString(const QString &fileNameAndPath); static QString readFileToString(const QString &fileNameAndPath);
//! Read file into string, with a lock so two applications can't access at the same time
static QString readLockedFileToString(const QString &fileNameAndPath);
//! Read file into string //! Read file into string
static QString readFileToString(const QString &filePath, const QString &fileName); static QString readFileToString(const QString &filePath, const QString &fileName);
//! Read file into string, with a lock so two applications can't access at the same time
static QString readLockedFileToString(const QString &filePath, const QString &fileName);
//! Write string to text file in background //! Write string to text file in background
static bool writeStringToFileInBackground(const QString &content, const QString &fileNameAndPath); static bool writeStringToFileInBackground(const QString &content, const QString &fileNameAndPath);