Initial Mangos Three Commit

dep/acelite/ace/Malloc_Base.h

@@ -0,0 +1,233 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file    Malloc_Base.h
+ *
+ *  @author Doug Schmidt and Irfan Pyarali
+ */
+//=============================================================================
+
+
+#ifndef ACE_MALLOC_BASE_H
+#define ACE_MALLOC_BASE_H
+#include /**/ "ace/pre.h"
+
+#include /**/ "ace/ACE_export.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ace/os_include/sys/os_types.h"
+#include "ace/os_include/sys/os_mman.h"
+#include "ace/os_include/sys/os_types.h"
+#include <limits>
+#include <new>
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+// 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:
+
+  /// Unsigned integer type used for specifying memory block lengths.
+  typedef size_t size_type;
+
+  // = 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 @a nbytes, but don't give them any initial value.
+  virtual void *malloc (size_type nbytes) = 0;
+
+  /// Allocate @a nbytes, giving them @a initial_value.
+  virtual void *calloc (size_type nbytes, char initial_value = '\0') = 0;
+
+  /// Allocate <n_elem> each of size @a elem_size, giving them
+  /// @a initial_value.
+  virtual void *calloc (size_type n_elem,
+                        size_type elem_size,
+                        char initial_value = '\0') = 0;
+
+  /// Free @a 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 @a name with @a pointer.  If @a duplicates == 0 then do
+   * not allow duplicate @a name/@a pointer associations, else if
+   * @a duplicates != 0 then allow duplicate @a name/@a pointer
+   * associations.  Returns 0 if successfully binds (1) a previously
+   * unbound @a name or (2) @a duplicates != 0, returns 1 if trying to
+   * bind a previously bound @a name and @a duplicates == 0, else
+   * returns -1 if a resource failure occurs.
+   */
+  virtual int bind (const char *name, void *pointer, int duplicates = 0) = 0;
+
+  /**
+   * Associate @a name with @a pointer.  Does not allow duplicate
+   * @a name/@a pointer associations.  Returns 0 if successfully binds
+   * (1) a previously unbound @a name, 1 if trying to bind a previously
+   * bound @a name, or returns -1 if a resource failure occurs.  When
+   * this call returns @a pointer's value will always reference the
+   * void * that @a name is associated with.  Thus, if the caller needs
+   * to use @a pointer (e.g., to free it) a copy must be maintained by
+   * the caller.
+   */
+  virtual int trybind (const char *name, void *&pointer) = 0;
+
+  /// Locate @a 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 @a len bytes of the memory region to the backing store
+   * starting at @c this->base_addr_.  If @a len == -1 then sync the
+   * whole region.
+   */
+  virtual int sync (ssize_t len = -1, int flags = MS_SYNC) = 0;
+
+  /// Sync @a len bytes of the memory region to the backing store
+  /// starting at @a addr.
+  virtual int sync (void *addr, size_type len, int flags = MS_SYNC) = 0;
+
+  /**
+   * Change the protection of the pages of the mapped region to @a prot
+   * starting at <this->base_addr_> up to @a len bytes.  If @a 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 @a prot
+  /// starting at @a addr up to @a len bytes.
+  virtual int protect (void *addr, size_type 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_;
+};
+
+/**
+ * @class ACE_Allocator_Std_Adapter
+ *
+ * @brief Model of std::allocator that forwards requests to
+#  ACE_Allocator::instance.  To be used with STL containers.
+ */
+
+template <typename T>
+class ACE_Export ACE_Allocator_Std_Adapter
+{
+public:
+  typedef T value_type;
+  typedef T* pointer;
+  typedef const T* const_pointer;
+  typedef T& reference;
+  typedef const T& const_reference;
+  typedef std::size_t size_type;
+  typedef std::ptrdiff_t difference_type;
+  template <typename U> struct rebind { typedef ACE_Allocator_Std_Adapter<U> other; };
+
+  ACE_Allocator_Std_Adapter() {}
+
+  template <typename U>
+  ACE_Allocator_Std_Adapter(const ACE_Allocator_Std_Adapter<U>&) {}
+
+  static T* allocate(std::size_t n)
+  {
+    void* raw_mem = ACE_Allocator::instance()->malloc(n * sizeof(T));
+    if (!raw_mem) throw std::bad_alloc();
+    return static_cast<T*>(raw_mem);
+  }
+
+  static void deallocate(T* ptr, std::size_t)
+  {
+    ACE_Allocator::instance()->free(ptr);
+  }
+
+  static void construct(T* ptr, const T& value)
+  {
+    new (static_cast<void*>(ptr)) T(value);
+  }
+
+  static void destroy(T* ptr)
+  {
+    ptr->~T();
+  }
+
+  static size_type max_size()
+  {
+    return (std::numeric_limits<size_type>::max)();
+  }
+};
+
+template <typename T, typename U>
+bool operator==(const ACE_Allocator_Std_Adapter<T>&, const ACE_Allocator_Std_Adapter<U>&)
+{
+  return true;
+}
+
+template <typename T, typename U>
+bool operator!=(const ACE_Allocator_Std_Adapter<T>&, const ACE_Allocator_Std_Adapter<U>&)
+{
+  return false;
+}
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#include /**/ "ace/post.h"
+#endif /* ACE_MALLOC_BASE_H */