ftmemory.h

这是osg的第三方插件库

/***************************************************************************/
/*                                                                         */
/*  ftmemory.h                                                             */
/*                                                                         */
/*    The FreeType memory management macros (specification).               */
/*                                                                         */
/*  Copyright 1996-2001, 2002, 2004 by                                     */
/*  David Turner, Robert Wilhelm, and Werner Lemberg                       */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#ifndef __FTMEMORY_H__
#define __FTMEMORY_H__


#include <ft2build.h>
#include FT_CONFIG_CONFIG_H
#include FT_TYPES_H


FT_BEGIN_HEADER


  /*************************************************************************/
  /*                                                                       */
  /* <Macro>                                                               */
  /*    FT_SET_ERROR                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This macro is used to set an implicit `error' variable to a given  */
  /*    expression's value (usually a function call), and convert it to a  */
  /*    boolean which is set whenever the value is != 0.                   */
  /*                                                                       */
#undef  FT_SET_ERROR
#define FT_SET_ERROR( expression ) \
          ( ( error = (expression) ) != 0 )


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /****                                                                 ****/
  /****                                                                 ****/
  /****                           M E M O R Y                           ****/
  /****                                                                 ****/
  /****                                                                 ****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/

#ifdef FT_DEBUG_MEMORY

  FT_BASE( FT_Error )
  FT_Alloc_Debug( FT_Memory    memory,
                  FT_Long      size,
                  void*       *P,
                  const char*  file_name,
                  FT_Long      line_no );

  FT_BASE( FT_Error )
  FT_QAlloc_Debug( FT_Memory    memory,
                   FT_Long      size,
                   void*       *P,
                   const char*  file_name,
                   FT_Long      line_no );

  FT_BASE( FT_Error )
  FT_Realloc_Debug( FT_Memory    memory,
                    FT_Long      current,
                    FT_Long      size,
                    void*       *P,
                    const char*  file_name,
                    FT_Long      line_no );

  FT_BASE( FT_Error )
  FT_QRealloc_Debug( FT_Memory    memory,
                     FT_Long      current,
                     FT_Long      size,
                     void*       *P,
                     const char*  file_name,
                     FT_Long      line_no );

  FT_BASE( void )
  FT_Free_Debug( FT_Memory    memory,
                 FT_Pointer   block,
                 const char*  file_name,
                 FT_Long      line_no );

#endif


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Alloc                                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Allocates a new block of memory.  The returned area is always      */
  /*    zero-filled; this is a strong convention in many FreeType parts.   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory :: A handle to a given `memory object' which handles        */
  /*              allocation.                                              */
  /*                                                                       */
  /*    size   :: The size in bytes of the block to allocate.              */
  /*                                                                       */
  /* <Output>                                                              */
  /*    P      :: A pointer to the fresh new block.  It should be set to   */
  /*              NULL if `size' is 0, or in case of error.                */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  FT_BASE( FT_Error )
  FT_Alloc( FT_Memory  memory,
            FT_Long    size,
            void*     *P );


  FT_BASE( FT_Error )
  FT_QAlloc( FT_Memory  memory,
             FT_Long    size,
             void*     *p );


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Realloc                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Reallocates a block of memory pointed to by `*P' to `Size' bytes   */
  /*    from the heap, possibly changing `*P'.                             */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory  :: A handle to a given `memory object' which handles       */
  /*               reallocation.                                           */
  /*                                                                       */
  /*    current :: The current block size in bytes.                        */
  /*                                                                       */
  /*    size    :: The new block size in bytes.                            */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    P       :: A pointer to the fresh new block.  It should be set to  */
  /*               NULL if `size' is 0, or in case of error.               */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    All callers of FT_Realloc() _must_ provide the current block size  */
  /*    as well as the new one.                                            */
  /*                                                                       */
  FT_BASE( FT_Error )
  FT_Realloc( FT_Memory  memory,
              FT_Long    current,
              FT_Long    size,
              void*     *P );


  FT_BASE( FT_Error )
  FT_QRealloc( FT_Memory  memory,
               FT_Long    current,
               FT_Long    size,
               void*     *p );


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Free                                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Releases a given block of memory allocated through FT_Alloc().     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory :: A handle to a given `memory object' which handles        */