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include/nuttx/mm/mm.h: Remove the assumption that one character equals eight bits.

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This commit is contained in:
Xiang Xiao 2019-11-03 19:54:23 -06:00 committed by Gregory Nutt
parent 9e3bafc7c6
commit 270b62bacc
1 changed files with 10 additions and 9 deletions
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19
include/nuttx/mm/mm.h
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@ -44,6 +44,7 @@
#include <sys/types.h>
#include <stdbool.h>
#include <string.h>
#include <semaphore.h>
/****************************************************************************
@ -131,8 +132,8 @@
* REVISIT: We could do better on machines with 16-bit addressing.
*/
# define MM_MIN_SHIFT 4 /* 16 bytes */
# define MM_MAX_SHIFT 15 /* 32 Kb */
# define MM_MIN_SHIFT B2C_SHIFT( 4) /* 16 bytes */
# define MM_MAX_SHIFT B2C_SHIFT(15) /* 32 Kb */
#elif defined(CONFIG_HAVE_LONG_LONG)
/* Four byte offsets; Pointers may be 4 or 8 bytes
@ -140,19 +141,19 @@
*/
# if UINTPTR_MAX <= UINT32_MAX
# define MM_MIN_SHIFT 4 /* 16 bytes */
# define MM_MIN_SHIFT B2C_SHIFT( 4) /* 16 bytes */
# elif UINTPTR_MAX <= UINT64_MAX
# define MM_MIN_SHIFT 5 /* 32 bytes */
# define MM_MIN_SHIFT B2C_SHIFT( 5) /* 32 bytes */
# endif
# define MM_MAX_SHIFT 22 /* 4 Mb */
# define MM_MAX_SHIFT B2C_SHIFT(22) /* 4 Mb */
#else
/* Four byte offsets; Pointers must be 4 bytes.
* sizeof(struct mm_freenode_s) is 16 bytes.
*/
# define MM_MIN_SHIFT 4 /* 16 bytes */
# define MM_MAX_SHIFT 22 /* 4 Mb */
# define MM_MIN_SHIFT B2C_SHIFT( 4) /* 16 bytes */
# define MM_MAX_SHIFT B2C_SHIFT(22) /* 4 Mb */
#endif
/* All other definitions derive from these two */
@ -205,9 +206,9 @@ struct mm_allocnode_s
/* What is the size of the allocnode? */
#ifdef CONFIG_MM_SMALL
# define SIZEOF_MM_ALLOCNODE 4
# define SIZEOF_MM_ALLOCNODE B2C(4)
#else
# define SIZEOF_MM_ALLOCNODE 8
# define SIZEOF_MM_ALLOCNODE B2C(8)
#endif
#define CHECK_ALLOCNODE_SIZE \