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platform: pre-increment netlink sequence number and add comment

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Pre-increment. That allows to not explicitly initialize nlh_seq_next
in nm_linux_platform_init().
This commit is contained in:
Thomas Haller
2018-03-09 17:44:17 +01:00
committed by Beniamino Galvani
parent d6bbac1b7d
commit e81224824a
1 changed files with 4 additions and 3 deletions
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7
src/platform/nm-linux-platform.c
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@@ -3964,8 +3964,10 @@ cache_on_change (NMPlatform *platform,
static guint32
_nlh_seq_next_get (NMLinuxPlatformPrivate *priv)
{
/* generate a new sequence number, but skip zero. */
return priv->nlh_seq_next++ ?: priv->nlh_seq_next++;
/* generate a new sequence number, but never return zero.
* Wrapping numbers are not a problem, because we don't rely
* on strictly increasing sequence numbers. */
return (++priv->nlh_seq_next) ?: (++priv->nlh_seq_next);
}
/**
@@ -6932,7 +6934,6 @@ nm_linux_platform_init (NMLinuxPlatform *self)
{
NMLinuxPlatformPrivate *priv = NM_LINUX_PLATFORM_GET_PRIVATE (self);
priv->nlh_seq_next = 1;
priv->delayed_action.list_master_connected = g_ptr_array_new ();
priv->delayed_action.list_refresh_link = g_ptr_array_new ();
priv->delayed_action.list_wait_for_nl_response = g_array_new (FALSE, TRUE, sizeof (DelayedActionWaitForNlResponseData));