my_malloc.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"
- #include <m_string.h>
- /* My memory allocator */
- gptr my_malloc(unsigned int Size, myf MyFlags)
- {
- gptr point;
- DBUG_ENTER("my_malloc");
- DBUG_PRINT("my",("Size: %u MyFlags: %d",Size, MyFlags));
- if (!Size)
- Size=1; /* Safety */
- if ((point = malloc(Size)) == NULL)
- {
- my_errno=errno;
- if (MyFlags & MY_FAE)
- error_handler_hook=fatal_error_handler_hook;
- if (MyFlags & (MY_FAE+MY_WME))
- my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),Size);
- if (MyFlags & MY_FAE)
- exit(1);
- }
- else if (MyFlags & MY_ZEROFILL)
- bzero(point,Size);
- DBUG_PRINT("exit",("ptr: %lx",point));
- DBUG_RETURN(point);
- } /* my_malloc */
- /* Free memory allocated with my_malloc */
- /*ARGSUSED*/
- void my_no_flags_free(gptr ptr)
- {
- DBUG_ENTER("my_free");
- DBUG_PRINT("my",("ptr: %lx",ptr));
- if (ptr)
- free(ptr);
- DBUG_VOID_RETURN;
- } /* my_free */
- /* malloc and copy */
- gptr my_memdup(const byte *from, uint length, myf MyFlags)
- {
- gptr ptr;
- if ((ptr=my_malloc(length,MyFlags)) != 0)
- memcpy((byte*) ptr, (byte*) from,(size_t) length);
- return(ptr);
- }
- my_string my_strdup(const char *from, myf MyFlags)
- {
- gptr ptr;
- uint length=(uint) strlen(from)+1;
- if ((ptr=my_malloc(length,MyFlags)) != 0)
- memcpy((byte*) ptr, (byte*) from,(size_t) length);
- return((my_string) ptr);
- }