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MySQL 5.1: mysql/src/5.1-dbg/libmysql/my_malloc.c Source File
mysql/src/5.1-dbg/libmysql/my_malloc.c

00001 /* Copyright (C) 2000 MySQL AB
00002 
00003    This program is free software; you can redistribute it and/or modify
00004    it under the terms of the GNU General Public License as published by
00005    the Free Software Foundation; either version 2 of the License, or
00006    (at your option) any later version.
00007 
00008    This program is distributed in the hope that it will be useful,
00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011    GNU General Public License for more details.
00012 
00013    You should have received a copy of the GNU General Public License
00014    along with this program; if not, write to the Free Software
00015    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
00016 
00017 #ifdef SAFEMALLOC                       /* We don't need SAFEMALLOC here */
00018 #undef SAFEMALLOC
00019 #endif
00020 
00021 #include "mysys_priv.h"
00022 #include "mysys_err.h"
00023 #include <m_string.h>
00024 
00025         /* My memory allocator */
00026 
00027 gptr my_malloc(unsigned int size, myf my_flags)
00028 {
00029   gptr point;
00030   DBUG_ENTER("my_malloc");
00031   DBUG_PRINT("my",("size: %u  my_flags: %d",size, my_flags));
00032 
00033   if (!size)
00034     size=1;                                     /* Safety */
00035   if ((point = (char*)malloc(size)) == NULL)
00036   {
00037     my_errno=errno;
00038     if (my_flags & MY_FAE)
00039       error_handler_hook=fatal_error_handler_hook;
00040     if (my_flags & (MY_FAE+MY_WME))
00041       my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),size);
00042     if (my_flags & MY_FAE)
00043       exit(1);
00044   }
00045   else if (my_flags & MY_ZEROFILL)
00046     bzero(point,size);
00047   DBUG_PRINT("exit",("ptr: 0x%lx",point));
00048   DBUG_RETURN(point);
00049 } /* my_malloc */
00050 
00051 
00052         /* Free memory allocated with my_malloc */
00053         /*ARGSUSED*/
00054 
00055 void my_no_flags_free(gptr ptr)
00056 {
00057   DBUG_ENTER("my_free");
00058   DBUG_PRINT("my",("ptr: 0x%lx",ptr));
00059   if (ptr)
00060     free(ptr);
00061   DBUG_VOID_RETURN;
00062 } /* my_free */
00063 
00064 
00065         /* malloc and copy */
00066 
00067 gptr my_memdup(const byte *from, uint length, myf my_flags)
00068 {
00069   gptr ptr;
00070   if ((ptr=my_malloc(length,my_flags)) != 0)
00071     memcpy((byte*) ptr, (byte*) from,(size_t) length);
00072   return(ptr);
00073 }
00074 
00075 
00076 char *my_strdup(const char *from, myf my_flags)
00077 {
00078   gptr ptr;
00079   uint length=(uint) strlen(from)+1;
00080   if ((ptr=my_malloc(length,my_flags)) != 0)
00081     memcpy((byte*) ptr, (byte*) from,(size_t) length);
00082   return((my_string) ptr);
00083 }
00084 
00085 
00086 char *my_strndup(const char *from, uint length, myf my_flags)
00087 {
00088   gptr ptr;
00089   if ((ptr=my_malloc(length+1,my_flags)) != 0)
00090   {
00091     memcpy((byte*) ptr, (byte*) from,(size_t) length);
00092     ((char*) ptr)[length]=0;
00093   }
00094   return((char*) ptr);
00095 }
Generated on Sat Sep 9 00:49:59 2006 for MySQL 5.1 by
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