mem.h

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/*
 * mem.h -- CoAP memory handling
 *
 * Copyright (C) 2010-2011,2014-2015 Olaf Bergmann <bergmann@tzi.org>
 *
 * This file is part of the CoAP library libcoap. Please see README for terms
 * of use.
 */

#ifndef _COAP_MEM_H_
#define _COAP_MEM_H_

#include <stdlib.h>

#ifndef WITH_LWIP

void coap_memory_init(void);
#endif /* WITH_LWIP */

typedef enum {
  COAP_STRING,
  COAP_ATTRIBUTE_NAME,
  COAP_ATTRIBUTE_VALUE,
  COAP_PACKET,
  COAP_NODE,
  COAP_CONTEXT,
  COAP_ENDPOINT,
  COAP_PDU,
  COAP_PDU_BUF,
  COAP_RESOURCE,
  COAP_RESOURCEATTR
} coap_memory_tag_t;

#ifndef WITH_LWIP

void *coap_malloc_type(coap_memory_tag_t type, size_t size);

void coap_free_type(coap_memory_tag_t type, void *p);

static inline void *coap_malloc(size_t size) {
  return coap_malloc_type(COAP_STRING, size);
}

static inline void coap_free(void *object) {
  coap_free_type(COAP_STRING, object);
}

#endif /* not WITH_LWIP */

#ifdef WITH_LWIP

#include <lwip/memp.h>

/* no initialization needed with lwip (or, more precisely: lwip must be
 * completely initialized anyway by the time coap gets active)  */
static inline void coap_memory_init(void) {}

/* It would be nice to check that size equals the size given at the memp
 * declaration, but i currently don't see a standard way to check that without
 * sourcing the custom memp pools and becoming dependent of its syntax
 */
#define coap_malloc_type(type, size) memp_malloc(MEMP_ ## type)
#define coap_free_type(type, p) memp_free(MEMP_ ## type, p)

/* Those are just here to make uri.c happy where string allocation has not been
 * made conditional.
 */
static inline void *coap_malloc(size_t size) {
  LWIP_ASSERT("coap_malloc must not be used in lwIP", 0);
}

static inline void coap_free(void *pointer) {
  LWIP_ASSERT("coap_free must not be used in lwIP", 0);
}

#endif /* WITH_LWIP */

#endif /* _COAP_MEM_H_ */