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-/* -*- C++ -*- */
-
-//=============================================================================
-/**
- * @file Malloc_Base.h
- *
- * $Id$
- *
- * @author Doug Schmidt and Irfan Pyarali
- */
-//=============================================================================
-
-
-#ifndef ACE_MALLOC_BASE_H
-#define ACE_MALLOC_BASE_H
-#include "ace/pre.h"
-
-#include "ace/OS.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-// The definition of this class is located in Malloc.cpp.
-
-/**
- * @class ACE_Allocator
- *
- * @brief Interface for a dynamic memory allocator that uses inheritance
- * and dynamic binding to provide extensible mechanisms for
- * allocating and deallocating memory.
- */
-class ACE_Export ACE_Allocator
-{
-public:
- // = Memory Management
-
- /// Get pointer to a default <ACE_Allocator>.
- static ACE_Allocator *instance (void);
-
- /// Set pointer to a process-wide <ACE_Allocator> and return existing
- /// pointer.
- static ACE_Allocator *instance (ACE_Allocator *);
-
- /// Delete the dynamically allocated Singleton
- static void close_singleton (void);
-
- /// "No-op" constructor (needed to make certain compilers happy).
- ACE_Allocator (void);
-
- /// Virtual destructor
- virtual ~ACE_Allocator (void);
-
- /// Allocate <nbytes>, but don't give them any initial value.
- virtual void *malloc (size_t nbytes) = 0;
-
- /// Allocate <nbytes>, giving them <initial_value>.
- virtual void *calloc (size_t nbytes, char initial_value = '\0') = 0;
-
- /// Allocate <n_elem> each of size <elem_size>, giving them
- /// <initial_value>.
- virtual void *calloc (size_t n_elem,
- size_t elem_size,
- char initial_value = '\0') = 0;
-
- /// Free <ptr> (must have been allocated by <ACE_Allocator::malloc>).
- virtual void free (void *ptr) = 0;
-
- /// Remove any resources associated with this memory manager.
- virtual int remove (void) = 0;
-
- // = Map manager like functions
-
- /**
- * Associate <name> with <pointer>. If <duplicates> == 0 then do
- * not allow duplicate <name>/<pointer> associations, else if
- * <duplicates> != 0 then allow duplicate <name>/<pointer>
- * assocations. Returns 0 if successfully binds (1) a previously
- * unbound <name> or (2) <duplicates> != 0, returns 1 if trying to
- * bind a previously bound <name> and <duplicates> == 0, else
- * returns -1 if a resource failure occurs.
- */
- virtual int bind (const char *name, void *pointer, int duplicates = 0) = 0;
-
- /**
- * Associate <name> with <pointer>. Does not allow duplicate
- * <name>/<pointer> associations. Returns 0 if successfully binds
- * (1) a previously unbound <name>, 1 if trying to bind a previously
- * bound <name>, or returns -1 if a resource failure occurs. When
- * this call returns <pointer>'s value will always reference the
- * void * that <name> is associated with. Thus, if the caller needs
- * to use <pointer> (e.g., to free it) a copy must be maintained by
- * the caller.
- */
- virtual int trybind (const char *name, void *&pointer) = 0;
-
- /// Locate <name> and pass out parameter via pointer. If found,
- /// return 0, Returns -1 if failure occurs.
- virtual int find (const char *name, void *&pointer) = 0;
-
- /// returns 0 if the name is in the mapping. -1, otherwise.
- virtual int find (const char *name) = 0;
-
- /// Unbind (remove) the name from the map. Don't return the pointer
- /// to the caller
- virtual int unbind (const char *name) = 0;
-
- /// Break any association of name. Returns the value of pointer in
- /// case the caller needs to deallocate memory.
- virtual int unbind (const char *name, void *&pointer) = 0;
-
- // = Protection and "sync" (i.e., flushing memory to persistent
- // backing store).
-
- /**
- * Sync <len> bytes of the memory region to the backing store
- * starting at <this->base_addr_>. If <len> == -1 then sync the
- * whole region.
- */
- virtual int sync (ssize_t len = -1, int flags = MS_SYNC) = 0;
-
- /// Sync <len> bytes of the memory region to the backing store
- /// starting at <addr_>.
- virtual int sync (void *addr, size_t len, int flags = MS_SYNC) = 0;
-
- /**
- * Change the protection of the pages of the mapped region to <prot>
- * starting at <this->base_addr_> up to <len> bytes. If <len> == -1
- * then change protection of all pages in the mapped region.
- */
- virtual int protect (ssize_t len = -1, int prot = PROT_RDWR) = 0;
-
- /// Change the protection of the pages of the mapped region to <prot>
- /// starting at <addr> up to <len> bytes.
- virtual int protect (void *addr, size_t len, int prot = PROT_RDWR) = 0;
-
-#if defined (ACE_HAS_MALLOC_STATS)
- /// Dump statistics of how malloc is behaving.
- virtual void print_stats (void) const = 0;
-#endif /* ACE_HAS_MALLOC_STATS */
-
- /// Dump the state of the object.
- virtual void dump (void) const = 0;
-private:
- // DO NOT ADD ANY STATE (DATA MEMBERS) TO THIS CLASS!!!! See the
- // <ACE_Allocator::instance> implementation for explanation.
-
- /// Pointer to a process-wide <ACE_Allocator> instance.
- static ACE_Allocator *allocator_;
-
- /// Must delete the <allocator_> if non-0.
- static int delete_allocator_;
-};
-
-#include "ace/post.h"
-#endif /* ACE_MALLOC_BASE_H */