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/*-------------------------------------------------------------------------
* Copyright (C) 1997 National Center for Supercomputing Applications.
* All rights reserved.
*
*-------------------------------------------------------------------------
*
* Created: H5MM.c
* Jul 10 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Memory management functions.
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
#include <H5private.h>
#include <H5MMprivate.h>
/*-------------------------------------------------------------------------
* Function: H5MM_xmalloc
*
* Purpose: Just like malloc(3) except it aborts on an error.
*
* Return: Success: Ptr to new memory.
*
* Failure: abort()
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
void *
H5MM_xmalloc (size_t size)
{
void *mem = HDmalloc (size);
assert (mem);
return mem;
}
/*-------------------------------------------------------------------------
* Function: H5MM_xcalloc
*
* Purpose: Just like calloc(3) except it aborts on an error.
*
* Return: Success: Ptr to memory.
*
* Failure: abort()
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
void *
H5MM_xcalloc (size_t n, size_t size)
{
void *mem = HDcalloc (n, size);
assert (mem);
return mem;
}
/*-------------------------------------------------------------------------
* Function: H5MM_xrealloc
*
* Purpose: Just like the POSIX version of realloc(3) exept it aborts
* on an error. Specifically, the following calls are
* equivalent
*
* H5MM_xrealloc (NULL, size) <==> H5MM_xmalloc (size)
* H5MM_xrealloc (ptr, 0) <==> H5MM_xfree (ptr)
* H5MM_xrealloc (NULL, 0) <==> NULL
*
* Return: Success: Ptr to new memory or NULL if the memory
* was freed.
*
* Failure: abort()
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
void *
H5MM_xrealloc (void *mem, size_t size)
{
if (!mem) {
if (0==size) return NULL;
mem = H5MM_xmalloc (size);
} else if (0==size) {
mem = H5MM_xfree (mem);
} else {
mem = HDrealloc (mem, size);
assert (mem);
}
return mem;
}
/*-------------------------------------------------------------------------
* Function: H5MM_strdup
*
* Purpose: Duplicates a string. If the string to be duplicated is the
* null pointer, then return null. If the string to be duplicated
* is the empty string then return a new empty string.
*
* Return: Success: Ptr to a new string (or null if no string).
*
* Failure: abort()
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
char *
H5MM_xstrdup (const char *s)
{
char *mem;
if (!s) return NULL;
mem = H5MM_xmalloc (HDstrlen (s)+1);
HDstrcpy (mem, s);
return mem;
}
/*-------------------------------------------------------------------------
* Function: H5MM_xfree
*
* Purpose: Just like free(3) except null pointers are allowed as
* arguments, and the return value (always NULL) can be
* assigned to the pointer whose memory was just freed:
*
* thing = H5MM_xfree (thing);
*
* Return: Success: NULL
*
* Failure: never fails
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
void *
H5MM_xfree (const void *mem)
{
/*
* free(3) takes a non-const pointer as an argument even though
* conceptually the argument could be a constant because by time
* free() mucks with it's contents, it should already be free :-)
* Instead of passing a const arg to free, which generates a
* compiler warning, we cast it to a non-const arg first. With
* gcc, this results in a warning only if -Wcast-qual is turned on.
*/
void *non_const_mem = mem;
if (mem) HDfree (non_const_mem);
return NULL;
}
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