my_realloc.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /* Copyright (C) 2000 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; 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 my_flags)
- {
- gptr point;
- DBUG_ENTER("my_realloc");
- DBUG_PRINT("my",("ptr: 0x%lx size: %u my_flags: %d",oldpoint, size,
- my_flags));
- if (!oldpoint && (my_flags & MY_ALLOW_ZERO_PTR))
- DBUG_RETURN(my_malloc(size,my_flags));
- #ifdef USE_HALLOC
- if (!(point = malloc(size)))
- {
- if (my_flags & MY_FREE_ON_ERROR)
- my_free(oldpoint,my_flags);
- if (my_flags & MY_HOLD_ON_ERROR)
- DBUG_RETURN(oldpoint);
- my_errno=errno;
- if (my_flags & MY_FAE+MY_WME)
- my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),size);
- }
- else
- {
- memcpy(point,oldpoint,size);
- free(oldpoint);
- }
- #else
- if ((point = (char*)realloc(oldpoint,size)) == NULL)
- {
- if (my_flags & MY_FREE_ON_ERROR)
- my_free(oldpoint,MyFLAGS);
- if (my_flags & MY_HOLD_ON_ERROR)
- DBUG_RETURN(oldpoint);
- my_errno=errno;
- if (my_flags & (MY_FAE+MY_WME))
- my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG), size);
- }
- #endif
- DBUG_PRINT("exit",("ptr: 0x%lx",point));
- DBUG_RETURN(point);
- } /* my_realloc */