my_realloc.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:2k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA */
- #ifdef SAFEMALLOC /* We don't need SAFEMALLOC here */
- #undef SAFEMALLOC
- #endif
- #include "mysys_priv.h"
- #include "mysys_err.h"
- /* My memory re allocator */
- gptr my_realloc(gptr oldpoint, uint Size, myf MyFlags)
- {
- gptr point;
- DBUG_ENTER("my_realloc");
- DBUG_PRINT("my",("ptr: %lx Size: %u MyFlags: %d",oldpoint, Size, MyFlags));
- if (!oldpoint && (MyFlags & MY_ALLOW_ZERO_PTR))
- DBUG_RETURN(my_malloc(Size,MyFlags));
- #ifdef USE_HALLOC
- if (!(point = malloc(Size)))
- {
- if (MyFlags & MY_FREE_ON_ERROR)
- my_free(oldpoint,MyFlags);
- if (MyFlags & MY_HOLD_ON_ERROR)
- DBUG_RETURN(oldpoint);
- my_errno=errno;
- if (MyFlags & MY_FAE+MY_WME)
- my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),Size);
- }
- else
- {
- memcpy(point,oldpoint,Size);
- free(oldpoint);
- }
- #else
- if ((point = realloc(oldpoint,Size)) == NULL)
- {
- if (MyFlags & MY_FREE_ON_ERROR)
- my_free(oldpoint,MyFLAGS);
- if (MyFlags & MY_HOLD_ON_ERROR)
- DBUG_RETURN(oldpoint);
- my_errno=errno;
- if (MyFlags & (MY_FAE+MY_WME))
- my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG), Size);
- }
- #endif
- DBUG_PRINT("exit",("ptr: %lx",point));
- DBUG_RETURN(point);
- } /* my_realloc */