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-rw-r--r--ace/Mem_Map.h203
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diff --git a/ace/Mem_Map.h b/ace/Mem_Map.h
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-/* -*- C++ -*- */
-// $Id$
-
-// ============================================================================
-//
-// = LIBRARY
-// ace
-//
-// = FILENAME
-// Mem_Map.h
-//
-// = AUTHOR
-// Doug Schmidt
-//
-// ============================================================================
-
-#if !defined (ACE_MEM_MAP_H)
-#define ACE_MEM_MAP_H
-
-#include "ace/ACE.h"
-
-class ACE_Export ACE_Mem_Map
-{
- // = TITLE
- // C++ interface OS memory mapping system call.
- //
- // = DESCRIPTION
- // This class works with both the mmap(2) UNIX system and the
- // Win32 family of memory mapping system calls.
-public:
- // = Initialization and termination methods.
-
- ACE_Mem_Map (void);
- // Default constructor.
-
- ACE_Mem_Map (ACE_HANDLE handle,
- int length = -1,
- int prot = PROT_RDWR,
- int share = ACE_MAP_PRIVATE,
- void *addr = 0,
- off_t pos = 0,
- LPSECURITY_ATTRIBUTES sa = 0);
- // Map a file from an open file descriptor <handle>. This function
- // will lookup the length of the file if it is not given.
-
- ACE_Mem_Map (LPCTSTR filename,
- int len = -1,
- int flags = O_RDWR | O_CREAT,
- int mode = ACE_DEFAULT_FILE_PERMS,
- int prot = PROT_RDWR,
- int share = ACE_MAP_PRIVATE,
- void *addr = 0,
- off_t pos = 0,
- LPSECURITY_ATTRIBUTES sa = 0);
- // Map a file specified by <file_name>.
-
- int map (ACE_HANDLE handle,
- int length = -1,
- int prot = PROT_RDWR,
- int share = ACE_MAP_PRIVATE,
- void *addr = 0,
- off_t pos = 0,
- LPSECURITY_ATTRIBUTES sa = 0);
- // Map a file from an open file descriptor <handle>. This function
- // will lookup the length of the file if it is not given.
-
- int map (int length = -1,
- int prot = PROT_RDWR,
- int share = ACE_MAP_PRIVATE,
- void *addr = 0,
- off_t pos = 0,
- LPSECURITY_ATTRIBUTES sa = 0);
- // Remap the file associated with <handle_>.
-
- int map (LPCTSTR filename,
- int len = -1,
- int flags = O_RDWR | O_CREAT,
- int mode = ACE_DEFAULT_FILE_PERMS,
- int prot = PROT_RDWR,
- int share = ACE_MAP_PRIVATE,
- void *addr = 0,
- off_t pos = 0,
- LPSECURITY_ATTRIBUTES sa = 0);
- // Map a file specified by <filename>.
-
- ~ACE_Mem_Map (void);
- // Destructor.
-
- int open (LPCTSTR filename,
- int flags = O_RDWR | O_CREAT,
- int mode = ACE_DEFAULT_FILE_PERMS,
- LPSECURITY_ATTRIBUTES sa = 0);
- // Open the file without mapping it.
-
- int close (void);
- // Close down the <handle_> if necessary and unmap the mapping.
-
- int close_handle (void);
- // Close down the <handle_> if necessary.
-
- int close_filemapping_handle (void);
- // Close down the internal <file_mapping_> if necessary. This is
- // mostly necessary on Win32, that has a different handle for
- // file-mapping kernel object.
-
- int operator () (void *&addr);
- // This operator passes back the starting address of the mapped
- // file.
-
- void *addr (void) const;
- // Return the base address.
-
- size_t size (void) const;
- // This function returns the number of bytes currently mapped in the
- // file.
-
- int unmap (int len = -1);
- // Unmap the region starting at <base_addr_>.
-
- int unmap (void *addr, int len);
- // Unmap the region starting at <addr_>.
-
- int sync (ssize_t len = -1, int flags = MS_SYNC);
- // Sync <len> bytes of the memory region to the backing store
- // starting at <base_addr_>. If <len> == -1 then sync the whole
- // region.
-
- int sync (void *addr, size_t len, int flags = MS_SYNC);
- // Sync <len> bytes of the memory region to the backing store
- // starting at <addr_>.
-
- int protect (ssize_t len = -1, int prot = PROT_RDWR);
- // Change the protection of the pages of the mapped region to <prot>
- // starting at <base_addr_> up to <len> bytes. If <len> == -1 then
- // change protection of all pages in the mapped region.
-
- int protect (void *addr, size_t len, int prot = PROT_RDWR);
- // Change the protection of the pages of the mapped region to <prot>
- // starting at <addr> up to <len> bytes.
-
- int remove (void);
- // Close down and remove the file from the file system.
-
- int advise (int behavior, int len = -1);
- // Hook into the underlying VM system.
-
- ACE_HANDLE handle (void) const;
- // Return the underlying <handle_>.
-
- const TCHAR *filename (void) const;
- // Return the name of file that is mapped (if any).
-
- void dump (void) const;
- // Dump the state of an object.
-
- ACE_ALLOC_HOOK_DECLARE;
- // Declare the dynamic allocation hooks.
-
-private:
- void *base_addr_;
- // Base address of the memory-mapped file.
-
- TCHAR filename_[MAXPATHLEN + 1];
- // Name of the file that is mapped.
-
- size_t length_;
- // Length of the mapping.
-
- ACE_HANDLE handle_;
- // HANDLE for the open file.
-
- ACE_HANDLE file_mapping_;
- // HANDLE for the open mapping.
-
-#if defined (__Lynx__)
- int write_enabled_;
- // Flag to indicate that PROT_WRITE has been enabled.
-#endif /* __Lynx__ */
-
- int close_handle_;
- // Keeps track of whether we need to close the handle. This is set
- // if we opened the file.
-
- int map_it (ACE_HANDLE handle,
- int len = -1,
- int prot = PROT_RDWR,
- int share = MAP_SHARED,
- void *addr = 0,
- off_t pos = 0,
- LPSECURITY_ATTRIBUTES sa = 0);
- // This method does the dirty work of actually calling ::mmap to map
- // the file into memory.
-
- // = Disallow copying and assignment.
- ACE_Mem_Map (const ACE_Mem_Map &);
- void operator = (const ACE_Mem_Map &);
-};
-
-#if defined (__ACE_INLINE__)
-#include "ace/Mem_Map.i"
-#endif /* __ACE_INLINE__ */
-
-#endif /* ACE_MEM_MAP_H */