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gnrc_pktbuf_static: expose _align() function to be used for tests

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This commit is contained in:
Martine Lenders 2021-02-19 11:28:01 +01:00
parent de67719b59
commit ecba5fa1d0
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GPG Key ID: CCD317364F63286F
4 changed files with 65 additions and 13 deletions
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4
sys/Makefile.include
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@ -21,6 +21,10 @@ ifneq (,$(filter gnrc_pktbuf,$(USEMODULE)))
include $(RIOTBASE)/sys/net/gnrc/pktbuf/Makefile.include
endif
ifneq (,$(filter gnrc_pktbuf_static,$(USEMODULE)))
include $(RIOTBASE)/sys/net/gnrc/pktbuf_static/Makefile.include
endif
ifneq (,$(filter malloc_thread_safe,$(USEMODULE)))
include $(RIOTBASE)/sys/malloc_thread_safe/Makefile.include
endif

2
sys/net/gnrc/pktbuf_static/Makefile.include Normal file
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@ -0,0 +1,2 @@
USEMODULE_INCLUDES_gnrc_pktbuf_static := $(LAST_MAKEFILEDIR)/include
USEMODULE_INCLUDES += $(USEMODULE_INCLUDES_gnrc_pktbuf_static)

14
sys/net/gnrc/pktbuf_static/gnrc_pktbuf_static.c
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@ -31,17 +31,11 @@
#include "net/gnrc/pkt.h"
#include "pktbuf_internal.h"
#include "pktbuf_static.h"
#define ENABLE_DEBUG 0
#include "debug.h"
#define _ALIGNMENT_MASK (sizeof(_unused_t) - 1)
typedef struct _unused {
struct _unused *next;
unsigned int size;
} _unused_t;
/* The static buffer needs to be aligned to word size, so that its start
* address can be casted to `_unused_t *` safely. Just allocating an array of
* (word sized) uintptr_t is a trivial way to do this */
@ -59,12 +53,6 @@ static gnrc_pktsnip_t *_create_snip(gnrc_pktsnip_t *next, const void *data, size
gnrc_nettype_t type);
static void *_pktbuf_alloc(size_t size);
/* fits size to byte alignment */
static inline size_t _align(size_t size)
{
return (size + _ALIGNMENT_MASK) & ~(_ALIGNMENT_MASK);
}
static inline void _set_pktsnip(gnrc_pktsnip_t *pkt, gnrc_pktsnip_t *next,
void *data, size_t size, gnrc_nettype_t type)
{

58
sys/net/gnrc/pktbuf_static/include/pktbuf_static.h Normal file
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@ -0,0 +1,58 @@
/*
* Copyright (C) 2014-2015 Martine S. Lenders <m.lenders@fu-berlin.de>
* Copyright (C) 2014-2021 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup net_gnrc_pktbuf
* @brief Internal definitions of the static implementation of
* @ref net_gnrc_pktbuf
* @{
*
* @file
* @brief Definitions of types and their alignment for usage in tests
*
* @author Martine Lenders <m.lenders@fu-berlin.de>
*/
#ifndef PKTBUF_STATIC_H
#define PKTBUF_STATIC_H
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Mask to align packet buffer allocations with size of @ref _unused_t
*/
#define GNRC_PKTBUF_STATIC_ALIGN_MASK (sizeof(_unused_t) - 1)
/**
* @brief Marks an unused section of the packet buffer arena array
*/
typedef struct _unused {
struct _unused *next; /**< the next unused section */
unsigned int size; /**< the size of the unused section */
} _unused_t;
/**
* @brief Calculates the required space of a number of bytes including
* alignment to the size of @ref _unused_t
*/
static inline size_t _align(size_t size)
{
return (size + GNRC_PKTBUF_STATIC_ALIGN_MASK) &
~(GNRC_PKTBUF_STATIC_ALIGN_MASK);
}
#ifdef __cplusplus
}
#endif
#endif /* PKTBUF_STATIC_H */
/** @} */