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Diffstat (limited to 'apps/JAWS/server/JAWS_File.h')
| -rw-r--r-- | apps/JAWS/server/JAWS_File.h | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/apps/JAWS/server/JAWS_File.h b/apps/JAWS/server/JAWS_File.h deleted file mode 100644 index a327b57c444..00000000000 --- a/apps/JAWS/server/JAWS_File.h +++ /dev/null @@ -1,225 +0,0 @@ -/* -*- c++ -*- */ -// Hey, Emacs! This is a C++ file! -// $Id$ - -// ============================================================================ -// -// = LIBRARY -// apps -// -// = FILENAME -// JAWS_File.h -// -// = AUTHOR -// James Hu -// -// ============================================================================ - -#ifndef JAWS_FILE_H -#define JAWS_FILE_H - -#include "ace/Mem_Map.h" -#include "ace/Synch.h" - -class JAWS_File; -class JAWS_Virtual_Filesystem; - -class JAWS_File_Handle - // = TITLE - // Abstraction over a real file. This is meant to be the - // entry point into the Cached Virtual Filesystem. - // On creation, the cache is checked, and reference count is - // incremented. On destruction, reference count is decremented. - // If the reference count is 0, the file is removed from the cache. - - // E.g. 1, - // { - // JAWS_File_Handle foo("foo.html"); - // this->peer ().send (foo.address (), foo.size ()); - // } - - // E.g. 2, - // { - // JAWS_File_Handle foo("foo.html"); - // io->transmitfile (foo.handle (), this->peer ().handle ()); - // } - - // E.g. 3, - // { - // JAWS_File_Handle foo("foo.html", content_length); - // this->peer ().recv (foo.address (), content_length); - // } -{ -public: - - JAWS_File_Handle (const char * filename); - // query cache for file, and acquire it - // assumes the file is being opened for reading - - JAWS_File_Handle (const char * filename, int size); - // create new entry, and acquire it - // presence of SIZE assumes the file is being opened for writing - - ~JAWS_File_Handle (void); - // closes any open handles, release acquired file - - void * address (void) const; - // base address of memory mapped file - - ACE_HANDLE handle (void) const; - // a handle (e.g., UNIX file descriptor, or NT file handle) - - int error (void) const; - // any associated error in handle creation and acquisition - - size_t size (void) const; - // the size of the file - -protected: - - JAWS_File_Handle (void); - // Default do nothing constructor. Prevent it from being called. - - void init (void); - -private: - JAWS_File * file_; - ACE_HANDLE handle_; - - static JAWS_Virtual_Filesystem * vfs_; -}; - -class JAWS_Virtual_Filesystem - // = TITLE - // A hash table holding the information about - // entry point into the Cached Virtual Filesystem. - // On creation, the cache is checked, and reference count is - // incremented. On destruction, reference count is decremented. - // If the reference count is 0, the file is removed from the cache. -{ -public: - - static JAWS_Virtual_Filesystem * instance (void); - ~JAWS_Virtual_Filesystem (void); - - JAWS_File * fetch (const char * filename); - JAWS_File * remove (const char * filename); - JAWS_File * insert (JAWS_File * new_file); - JAWS_File * replace (JAWS_File * new_file); - -protected: - - JAWS_Virtual_Filesystem (void); - -private: - - int fetch_i (const char * filename); - JAWS_File * remove_i (int index); - JAWS_File * insert_i (JAWS_File * new_file); - -public: - - enum - { - DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE = 512, - // For this stupid implementation, use an array. Someday, use - // a balanced search tree. - - DEFAULT_VIRTUAL_FILESYSTEM_CACHE_SIZE = 10 - // This determines the highwater mark in megabytes for the cache. - // This will be ignored for now. - }; - -private: - - JAWS_File * table_[DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE]; - int size_; - - static JAWS_Virtual_Filesystem * cvf_; - static ACE_SYNCH_MUTEX lock_; -}; - -class JAWS_File - // = TITLE - // Abstraction over a real file. This is what the Virtual Filesystem - // contains. This class is not intended for general consumption. - // Please consult a physician before attempting to use this class. -{ -public: - - JAWS_File (const char * filename); - // creates a file for reading - - JAWS_File (const char * filename, int size); - // creates a file for writing - - ~JAWS_File (void); - // only if reference count is zero should this be called - - int acquire (void); - // increment the reference_count_ - - int release (void); - // decrement the reference_count_ - - int action (void) const; - int action (int action_value); - // action_ accessors - - int error (void) const; - int error (int error_value, const char * s = "JAWS_File"); - // error_ accessors - - const char * filename (void) const; - // filename_ accessor - - ACE_HANDLE handle (void) const; - // handle_ accessor - - void * address (void) const; - // base memory address for memory mapped file - - size_t size (void) const; - // size_ accessor - - int update (void) const; - // true if file on disk is newer than cached file - -protected: - - JAWS_File (void); - - void init (void); - -public: - - enum { IDLE = 0, READING = 1, WRITING = 2, WAITING = 4 }; - // action status indicators - // WAITING -- removed from Virtual Filesystem, but not deleted - - enum { OKIE_DOKIE = 0, - ACCESS_FAILED, - OPEN_FAILED, - COPY_FAILED, - STAT_FAILED, - MEMMAP_FAILED, - WRITE_FAILED }; - -private: - char * tempname_; - char filename_[MAXPATHLEN+1]; - - ACE_Mem_Map mmap_; - ACE_HANDLE handle_; - - struct stat stat_; - size_t size_; - - int action_; - int error_; - - int reference_count_; - ACE_SYNCH_MUTEX lock_; -}; - -#endif /* JAWS_FILE_H */ |