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lib_pathbuffer.c:Determine whether to malloc from the heap by CONFIG_LIBC_PATHBUFFER_MALLOC

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Summary:
  If we disable LIB_PATHBUFFER_MALLOC, that when the path buffer is insufficient, NULL is returned to avoid applying for a buffer from the heap.

Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
This commit is contained in:
chenrun1 2024-08-20 14:14:22 +08:00 committed by Xiang Xiao
parent 16afee6f0c
commit 36a8ff0540
2 changed files with 16 additions and 2 deletions
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6
libs/libc/misc/Kconfig
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@ -120,3 +120,9 @@ config LIBC_MAX_PATHBUFFER
---help---
This value is the maximum size of the buffer that will hold the full
file path.
config LIBC_PATHBUFFER_MALLOC
bool "Enable malloc pathbuffer"
default y
---help---
Enable malloc path buffer from the heap when pathbuffer is insufficient.

12
libs/libc/misc/lib_pathbuffer.c
View file

@ -95,9 +95,15 @@ FAR char *lib_get_pathbuffer(void)
nxmutex_unlock(&g_pathbuffer.lock);
/* If no free buffer is found, allocate a new one */
/* If no free buffer is found, allocate a new one if
* CONFIG_LIBC_PATHBUFFER_MALLOC is enabled
*/
#ifdef CONFIG_LIBC_PATHBUFFER_MALLOC
return lib_malloc(PATH_MAX);
#else
return NULL;
#endif
}
/****************************************************************************
@ -134,5 +140,7 @@ void lib_put_pathbuffer(FAR char *buffer)
/* Free the buffer if it was dynamically allocated */
lib_free(buffer);
#ifdef CONFIG_LIBC_PATHBUFFER_MALLOC
return lib_free(buffer);
#endif
}