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/*
* alloc.c
*
* memory allocation and deallocation
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2006 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "alloc.h"
#include "crypto_kernel.h"
/* the debug module for memory allocation */
debug_module_t mod_alloc = {
0, /* debugging is off by default */
"alloc" /* printable name for module */
};
/*
* Nota bene: the debugging statements for crypto_alloc() and
* crypto_free() have identical prefixes, which include the addresses
* of the memory locations on which they are operating. This fact can
* be used to locate memory leaks, by turning on memory debugging,
* grepping for 'alloc', then matching alloc and free calls by
* address.
*/
#ifdef SRTP_KERNEL_LINUX
#include <linux/interrupt.h>
void *
crypto_alloc(size_t size) {
void *ptr;
ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
if (ptr) {
debug_print(mod_alloc, "(location: %p) allocated", ptr);
} else
debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
return ptr;
}
void
crypto_free(void *ptr) {
debug_print(mod_alloc, "(location: %p) freed", ptr);
kfree(ptr);
}
#elif defined(HAVE_STDLIB_H)
void *
crypto_alloc(size_t size) {
void *ptr;
ptr = malloc(size);
if (ptr) {
debug_print(mod_alloc, "(location: %p) allocated", ptr);
} else
debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
return ptr;
}
void
crypto_free(void *ptr) {
debug_print(mod_alloc, "(location: %p) freed", ptr);
free(ptr);
}
#else /* we need to define our own memory allocation routines */
#error no memory allocation defined yet
#endif
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