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Diffstat (limited to 'ace/Pagefile_Memory_Pool.h')
| -rw-r--r-- | ace/Pagefile_Memory_Pool.h | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/ace/Pagefile_Memory_Pool.h b/ace/Pagefile_Memory_Pool.h deleted file mode 100644 index eab04d23849..00000000000 --- a/ace/Pagefile_Memory_Pool.h +++ /dev/null @@ -1,201 +0,0 @@ -// -*- C++ -*- - -//============================================================================= -/** - * @file Pagefile_Memory_Pool.h - * - * $Id$ - * - * @author Dougls C. Schmidt <schmidt@cs.wustl.edu> - * @author Prashant Jain <pjain@cs.wustl.edu> - */ -//============================================================================= - -#ifndef ACE_PAGEFILE_MEMORY_POOL_H -#define ACE_PAGEFILE_MEMORY_POOL_H - -#include /**/ "ace/pre.h" - -#include "ace/ACE_export.h" - -#if !defined (ACE_LACKS_PRAGMA_ONCE) -# pragma once -#endif /* ACE_LACKS_PRAGMA_ONCE */ - -#if defined (ACE_WIN32) - -#include "ace/ACE.h" -#include "ace/os_include/sys/os_mman.h" - -ACE_BEGIN_VERSIONED_NAMESPACE_DECL - -/** - * @class ACE_Pagefile_Memory_Pool_Options - * - * @brief Helper class for Pagefile Memory Pool constructor options. - * - * This should be a nested class, but that breaks too many - * compilers. - */ -class ACE_Export ACE_Pagefile_Memory_Pool_Options -{ -public: - /// Initialization method. - ACE_Pagefile_Memory_Pool_Options ( - void *base_addr = ACE_DEFAULT_PAGEFILE_POOL_BASE, - size_t max_size = ACE_DEFAULT_PAGEFILE_POOL_SIZE); - - /// Base address of the memory-mapped backing store. - void *base_addr_; - - /// Maximum size the pool may grow. - size_t max_size_; -}; - -/** - * @class ACE_Pagefile_Memory_Pool - * - * @brief Make a memory pool that is based on "anonymous" memory - * regions allocated from the Win32 page file. - */ -class ACE_Export ACE_Pagefile_Memory_Pool -{ -public: - typedef ACE_Pagefile_Memory_Pool_Options OPTIONS; - - /// Initialize the pool. - ACE_Pagefile_Memory_Pool (const ACE_TCHAR *backing_store_name = 0, - const OPTIONS *options = 0); - - /// Ask system for initial chunk of shared memory. - void *init_acquire (size_t nbytes, - size_t &rounded_bytes, - int &first_time); - - /// Acquire at least <nbytes> from the memory pool. <rounded_bytes> - /// is the actual number of bytes allocated. - void *acquire (size_t nbytes, - size_t &rounded_bytes); - - /// Instruct the memory pool to release all of its resources. - int release (int destroy = 1); - - /** - * Win32 Structural exception selector. The return value decides - * how to handle memory pool related structural exceptions. Returns - * 1, 0, or , -1. - */ - virtual int seh_selector (void *); - - /** - * Try to extend the virtual address space so that <addr> is now - * covered by the address mapping. The method succeeds and returns - * 0 if the backing store has adequate memory to cover this address. - * Otherwise, it returns -1. This method is typically called by an - * exception handler for a Win32 structured exception when another - * process has grown the backing store (and its mapping) and our - * process now incurs a fault because our mapping isn't in range - * (yet). - */ - int remap (void *addr); - - /// Round up to system page size. - size_t round_to_page_size (size_t nbytes); - - /// Round up to the chunk size required by the operation system - size_t round_to_chunk_size (size_t nbytes); - - // = Don't need this methods here ... - int sync (ssize_t = -1, int = MS_SYNC); - int sync (void *, size_t, int = MS_SYNC); - int protect (ssize_t = -1, int = PROT_RDWR); - int protect (void *, size_t, int = PROT_RDWR); - - /// Return the base address of this memory pool, 0 if base_addr - /// never changes. - virtual void *base_addr (void) const; - - void dump (void) const {} - -protected: - - /** - * Map portions or the entire pool into the local virtual address - * space. To do this, we compute the new @c file_offset of the - * backing store and commit the memory. - */ - int map (int &firstTime, size_t appendBytes = 0); - - /// Release the mapping. - int unmap (void); - -private: - - /** - * @class Control_Block - * - * @brief Attributes that are meaningful in local storage only. - */ - class Control_Block - { - public: - /// Required base address - void *req_base_; - - /// Base address returned from system call - void *mapped_base_; - - /** - * @class Shared_Control_Block - * - * @brief Pool statistics - */ - class Shared_Control_Block - { - public: - /// Maximum size the pool may grow - size_t max_size_; - - /// Size of mapped shared memory segment - size_t mapped_size_; - - /// Offset to mapped but not yet acquired address space - ptrdiff_t free_offset_; - - /// Size of mapped but not yet acquired address space - size_t free_size_; - }; - - Shared_Control_Block sh_; - }; - - // Base of mapped region. If this has the value of 0 then the OS is - // free to select any address to map the file, otherwise this value - // is what the OS must try to use to mmap the file. - - /// Description of what our process mapped. - Control_Block local_cb_; - - /// Shared memory pool statistics. - Control_Block *shared_cb_; - - /// File mapping handle. - ACE_HANDLE object_handle_; - - /// System page size. - size_t page_size_; - - /// Name of the backing store where the shared memory pool is kept. - ACE_TCHAR backing_store_name_[MAXPATHLEN]; -}; - -ACE_END_VERSIONED_NAMESPACE_DECL - -#endif /* ACE_WIN32 */ - -#if defined (__ACE_INLINE__) -#include "ace/Pagefile_Memory_Pool.inl" -#endif /* __ACE_INLINE__ */ - -#include /**/ "ace/post.h" -#endif /* ACE_MEMORY_POOL_H */ |