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| author | Thomas Haller <thaller@redhat.com> | 2020-04-27 08:02:40 +0200 |
|---|---|---|
| committer | Thomas Haller <thaller@redhat.com> | 2020-04-28 18:35:59 +0200 |
| commit | 32664c72a5a61e1b2a156436d9132cbbc928b9c0 (patch) | |
| tree | c89e417323d46c8d5b819e6a06104056889a6252 | |
| parent | 2a26562ec8c1d824dc0f64397b1e1b452baded50 (diff) | |
| download | NetworkManager-32664c72a5a61e1b2a156436d9132cbbc928b9c0.tar.gz | |
shared: add nm_gbytes_get_empty() singleton getter
| -rw-r--r-- | shared/nm-glib-aux/nm-shared-utils.c | 18 | ||||
| -rw-r--r-- | shared/nm-glib-aux/nm-shared-utils.h | 2 |
2 files changed, 20 insertions, 0 deletions
diff --git a/shared/nm-glib-aux/nm-shared-utils.c b/shared/nm-glib-aux/nm-shared-utils.c index 61e3e26716..5dd099a7c9 100644 --- a/shared/nm-glib-aux/nm-shared-utils.c +++ b/shared/nm-glib-aux/nm-shared-utils.c @@ -397,6 +397,24 @@ truncate: /*****************************************************************************/ +GBytes * +nm_gbytes_get_empty (void) +{ + static GBytes *bytes = NULL; + GBytes *b; + +again: + b = g_atomic_pointer_get (&bytes); + if (G_UNLIKELY (!b)) { + b = g_bytes_new_static ("", 0); + if (!g_atomic_pointer_compare_and_exchange (&bytes, NULL, b)) { + g_bytes_unref (b); + goto again; + } + } + return b; +} + /** * nm_utils_gbytes_equals: * @bytes: (allow-none): a #GBytes array to compare. Note that diff --git a/shared/nm-glib-aux/nm-shared-utils.h b/shared/nm-glib-aux/nm-shared-utils.h index 9200f80fdf..d5990c2d54 100644 --- a/shared/nm-glib-aux/nm-shared-utils.h +++ b/shared/nm-glib-aux/nm-shared-utils.h @@ -389,6 +389,8 @@ nm_utils_is_separator (const char c) /*****************************************************************************/ +GBytes *nm_gbytes_get_empty (void); + static inline gboolean nm_gbytes_equal0 (GBytes *a, GBytes *b) { |