diff options
author | Simon Glass <sjg@chromium.org> | 2013-11-10 17:26:57 (GMT) |
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committer | Simon Glass <sjg@chromium.org> | 2014-01-09 00:24:19 (GMT) |
commit | 77595c6d9e2c1af9c3b143f496c4c47d0e95a458 (patch) | |
tree | fd18c5f9e08c1a556ad703eb1e9b1086164cf8f6 /include | |
parent | f4d8de48f5a2aa1885daa0d425b8c0568a2ccb69 (diff) | |
download | u-boot-77595c6d9e2c1af9c3b143f496c4c47d0e95a458.tar.xz |
sandbox: Improve/augment memory allocation functions
Implement realloc() and free() for sandbox, by adding a header to each
block which contains the block size.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Che-Liang Chiou <clchiou@chromium.org>
Reviewed-by: Hung-ying Tyan <tyanh@chromium.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/os.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/os.h b/include/os.h index 950433d..1575a96 100644 --- a/include/os.h +++ b/include/os.h @@ -107,6 +107,35 @@ void os_tty_raw(int fd); void *os_malloc(size_t length); /** + * Free memory previous allocated with os_malloc()/os_realloc() + * + * This returns the memory to the OS. + * + * \param ptr Pointer to memory block to free + */ +void *os_free(void *ptr); + +/** + * Reallocate previously-allocated memory to increase/decrease space + * + * This works in a similar way to the C library realloc() function. If + * length is 0, then ptr is freed. Otherwise the space used by ptr is + * expanded or reduced depending on whether length is larger or smaller + * than before. + * + * If ptr is NULL, then this is similar to calling os_malloc(). + * + * This function may need to move the memory block to make room for any + * extra space, in which case the new pointer is returned. + * + * \param ptr Pointer to memory block to reallocate + * \param length New length for memory block + * \return pointer to new memory block, or NULL on failure or if length + * is 0. + */ +void *os_realloc(void *ptr, size_t length); + +/** * Access to the usleep function of the os * * \param usec Time to sleep in micro seconds |