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Diffstat (limited to '')
-rw-r--r-- | src/slibc-alloc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/slibc-alloc.c b/src/slibc-alloc.c index 2f51603..f93a4b5 100644 --- a/src/slibc-alloc.c +++ b/src/slibc-alloc.c @@ -58,15 +58,19 @@ * This function is identical to `free`, except it is guaranteed not to * override the memory segment with zeroes before freeing the allocation. * + * `errno` is guaranteed not to be set. + * * @param segment The memory segment to free. * * @since Always. */ void fast_free(void* segment) { + int saved_errno = errno; if (segment == NULL) return; munmap(PURE_ALLOC(segment), PURE_SIZE(segment)); + errno = saved_errno; } @@ -74,16 +78,20 @@ void fast_free(void* segment) * This function is identical to `free`, except it is guaranteed to * override the memory segment with zeroes before freeing the allocation. * + * `errno` is guaranteed not to be set. + * * @param segment The memory segment to free. * * @since Always. */ void secure_free(void* segment) { + int saved_errno = errno; if (segment == NULL) return; explicit_bzero(PURE_ALLOC(segment), PURE_SIZE(segment)); fast_free(segment); + errno = saved_errno; } |