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0032564: Foundation Classes, OSD_CachedFileSystem - allow referring to non-default File System

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Linked file system can be now customized within OSD_CachedFileSystem.
This commit is contained in:
kgv 2021-09-09 18:00:38 +03:00 committed by smoskvin
parent 7d7541ceeb
commit 801e67bc7b
2 changed files with 27 additions and 10 deletions
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24
src/OSD/OSD_CachedFileSystem.cxx
View File

@ -16,13 +16,23 @@
IMPLEMENT_STANDARD_RTTIEXT(OSD_CachedFileSystem, OSD_FileSystem)
//=======================================================================
// function : OSD_CachedFileSystem
// purpose :
//=======================================================================
OSD_CachedFileSystem::OSD_CachedFileSystem (const Handle(OSD_FileSystem)& theLinkedFileSystem)
: myLinkedFS (!theLinkedFileSystem.IsNull() ? theLinkedFileSystem : OSD_FileSystem::DefaultFileSystem())
{
//
}
//=======================================================================
// function : IsSupportedPath
// purpose :
//=======================================================================
Standard_Boolean OSD_CachedFileSystem::IsSupportedPath (const TCollection_AsciiString& theUrl) const
{
return OSD_FileSystem::DefaultFileSystem()->IsSupportedPath (theUrl);
return myLinkedFS->IsSupportedPath (theUrl);
}
//=======================================================================
@ -31,7 +41,7 @@ Standard_Boolean OSD_CachedFileSystem::IsSupportedPath (const TCollection_AsciiS
//=======================================================================
Standard_Boolean OSD_CachedFileSystem::IsOpenIStream (const opencascade::std::shared_ptr<std::istream>& theStream) const
{
return OSD_FileSystem::DefaultFileSystem()->IsOpenIStream (theStream);
return myLinkedFS->IsOpenIStream (theStream);
}
//=======================================================================
@ -40,7 +50,7 @@ Standard_Boolean OSD_CachedFileSystem::IsOpenIStream (const opencascade::std::sh
//=======================================================================
Standard_Boolean OSD_CachedFileSystem::IsOpenOStream (const opencascade::std::shared_ptr<std::ostream>& theStream) const
{
return OSD_FileSystem::DefaultFileSystem()->IsOpenOStream (theStream);
return myLinkedFS->IsOpenOStream (theStream);
}
//=======================================================================
@ -57,7 +67,7 @@ opencascade::std::shared_ptr<std::istream> OSD_CachedFileSystem::OpenIStream (co
myStream.Url = theUrl;
myStream.Reset();
}
myStream.Stream = OSD_FileSystem::DefaultFileSystem()->OpenIStream (theUrl, theParams, theOffset, myStream.Stream);
myStream.Stream = myLinkedFS->OpenIStream (theUrl, theParams, theOffset, myStream.Stream);
return myStream.Stream;
}
@ -68,7 +78,7 @@ opencascade::std::shared_ptr<std::istream> OSD_CachedFileSystem::OpenIStream (co
opencascade::std::shared_ptr<std::ostream> OSD_CachedFileSystem::OpenOStream (const TCollection_AsciiString& theUrl,
const std::ios_base::openmode theMode)
{
return OSD_FileSystem::DefaultFileSystem()->OpenOStream (theUrl, theMode);
return myLinkedFS->OpenOStream (theUrl, theMode);
}
//=======================================================================
@ -82,13 +92,13 @@ opencascade::std::shared_ptr<std::streambuf> OSD_CachedFileSystem::OpenStreamBuf
{
if ((theMode & std::ios::out) == std::ios::out)
{
return OSD_FileSystem::DefaultFileSystem()->OpenStreamBuffer (theUrl, theMode, theOffset, theOutBufSize);
return myLinkedFS->OpenStreamBuffer (theUrl, theMode, theOffset, theOutBufSize);
}
if (myStream.Url != theUrl)
{
myStream.Url = theUrl;
myStream.Reset();
}
myStream.StreamBuf = OSD_FileSystem::DefaultFileSystem()->OpenStreamBuffer (theUrl, theMode, theOffset, theOutBufSize);
myStream.StreamBuf = myLinkedFS->OpenStreamBuffer (theUrl, theMode, theOffset, theOutBufSize);
return myStream.StreamBuf;
}

13
src/OSD/OSD_CachedFileSystem.hxx
View File

@ -16,7 +16,7 @@
#include <OSD_FileSystem.hxx>
//! File system keeping last stream created by OSD_FileSystem::DefaultFileSystem() to be reused for opening a stream with the same URL.
//! File system keeping last stream created by linked file system (OSD_FileSystem::DefaultFileSystem() by default) to be reused for opening a stream with the same URL.
//! Note that as file is kept in opened state, application will need destroying this object to ensure all files being closed.
//! This interface could be handy in context of reading numerous objects pointing to the same file (at different offset).
//! Make sure to create a dedicated OSD_CachedFileSystem for each working thread to avoid data races.
@ -26,7 +26,13 @@ class OSD_CachedFileSystem : public OSD_FileSystem
public:
//! Constructor.
OSD_CachedFileSystem() {}
Standard_EXPORT OSD_CachedFileSystem (const Handle(OSD_FileSystem)& theLinkedFileSystem = Handle(OSD_FileSystem)());
//! Return linked file system; initialized with OSD_FileSystem::DefaultFileSystem() by default.
const Handle(OSD_FileSystem)& LinkedFileSystem() const { return myLinkedFS; }
//! Sets linked file system.
void SetLinkedFileSystem (const Handle(OSD_FileSystem)& theLinkedFileSystem) { myLinkedFS = theLinkedFileSystem; }
//! Returns TRUE if URL defines a supported protocol.
Standard_EXPORT virtual Standard_Boolean IsSupportedPath (const TCollection_AsciiString& theUrl) const Standard_OVERRIDE;
@ -73,7 +79,8 @@ protected:
protected:
OSD_CachedStream myStream;
OSD_CachedStream myStream; //!< active cached stream
Handle(OSD_FileSystem) myLinkedFS; //!< linked file system to open files
};