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by brian
clean slate |
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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "mysys_priv.h" |
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#include "mysys_err.h" |
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/* My memory re allocator */
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/**
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@brief wrapper around realloc()
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@param oldpoint pointer to currently allocated area
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@param size new size requested, must be >0
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@param my_flags flags
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@note if size==0 realloc() may return NULL; my_realloc() treats this as an
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error which is not the intention of realloc()
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*/
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void* my_realloc(void* oldpoint, size_t size, myf my_flags) |
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{
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void *point; |
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DBUG_ENTER("my_realloc"); |
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DBUG_PRINT("my",("ptr: 0x%lx size: %lu my_flags: %d", (long) oldpoint, |
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(ulong) size, my_flags)); |
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DBUG_ASSERT(size > 0); |
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if (!oldpoint && (my_flags & MY_ALLOW_ZERO_PTR)) |
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DBUG_RETURN(my_malloc(size,my_flags)); |
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#ifdef USE_HALLOC
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if (!(point = malloc(size))) |
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{
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if (my_flags & MY_FREE_ON_ERROR) |
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my_free(oldpoint,my_flags); |
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if (my_flags & MY_HOLD_ON_ERROR) |
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DBUG_RETURN(oldpoint); |
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my_errno=errno; |
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if (my_flags & MY_FAE+MY_WME) |
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my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),size); |
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}
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else
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{
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memcpy(point,oldpoint,size); |
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free(oldpoint); |
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}
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#else
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if ((point= (uchar*) realloc(oldpoint,size)) == NULL) |
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{
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if (my_flags & MY_FREE_ON_ERROR) |
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my_free(oldpoint, my_flags); |
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if (my_flags & MY_HOLD_ON_ERROR) |
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DBUG_RETURN(oldpoint); |
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my_errno=errno; |
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if (my_flags & (MY_FAE+MY_WME)) |
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my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG), size); |
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}
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#endif
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DBUG_PRINT("exit",("ptr: 0x%lx", (long) point)); |
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DBUG_RETURN(point); |
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} /* my_realloc */ |