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Explain the errno use in g_aligned_alloc()

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Emmanuele Bassi 2022-01-07 17:29:06 +00:00 committed by Philip Withnall
parent b37c99c44e
commit 36449ef5f9
1 changed files with 8 additions and 0 deletions
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8
glib/gmem.c
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@ -595,6 +595,14 @@ g_aligned_alloc (gsize n_blocks,
return NULL; return NULL;
} }
/* We need to clear errno because posix_memalign() will use its return
* value in the same way memalign() and aligned_alloc() will set errno.
* Additionally, posix_memalign() will warn if its return value is left
* unassigned.
*
* We handle all possible return values (ENOMEM and EINVAL) with either
* precondition or postcondition checking.
*/
errno = 0; errno = 0;
#if defined(HAVE_POSIX_MEMALIGN) #if defined(HAVE_POSIX_MEMALIGN)