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53 lines
1.9 KiB
53 lines
1.9 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $NoKeywords: $ |
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//=============================================================================// |
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#ifndef VMPI_FILESYSTEM_H |
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#define VMPI_FILESYSTEM_H |
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#ifdef _WIN32 |
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#pragma once |
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#endif |
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#include "interface.h" |
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class IFileSystem; |
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class MessageBuffer; |
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// Use this to read virtual files. |
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#define VMPI_VIRTUAL_FILES_PATH_ID "VMPI_VIRTUAL_FILES_PATH_ID" |
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// When you hook the file system with VMPI and are a worker, it blocks on file reads |
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// and uses MPI to communicate with the master to transfer files it needs over. |
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// |
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// The filesystem, by default (and it maxFileSystemMemoryUsage is left at zero), |
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// keeps the contents of the files that get opened in memory. You can pass in a |
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// value here to put a cap on it, in which case it'll unload the least-recently-used |
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// files when it hits the limit. |
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IFileSystem* VMPI_FileSystem_Init( int maxFileSystemMemoryUsage, IFileSystem *pPassThru ); |
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// On the master machine, this really should be called before the app shuts down and |
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// global destructors are called. If it isn't, it might lock up waiting for a thread to exit. |
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// |
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// This returns the original filesystem you passed into VMPI_FileSystem_Init so you can uninitialize it. |
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IFileSystem* VMPI_FileSystem_Term(); |
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// Causes it to error out on any Open() calls. |
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void VMPI_FileSystem_DisableFileAccess(); |
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// Returns a factory that will hand out BASEFILESYSTEM_INTERFACE_VERSION when asked for it. |
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CreateInterfaceFn VMPI_FileSystem_GetFactory(); |
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// This function creates a virtual file that workers can then open and read out of. |
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// NOTE: when reading from the file, you must use VMPI_VIRTUAL_FILES_PATH_ID as the path ID |
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// or else it won't find the file. |
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void VMPI_FileSystem_CreateVirtualFile( const char *pFilename, const void *pData, unsigned long fileLength ); |
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#endif // VMPI_FILESYSTEM_H
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