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| author | Mattias Andrée <maandree@kth.se> | 2022-02-17 17:23:57 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2022-02-17 17:23:57 +0100 |
| commit | 611f60b5fbc14f0c2ca31476e8f7ebd8cb442402 (patch) | |
| tree | 2f800da4309dc475e15100ac625ff252a1354d19 | |
| parent | Fix typo (diff) | |
| download | libblake-611f60b5fbc14f0c2ca31476e8f7ebd8cb442402.tar.gz libblake-611f60b5fbc14f0c2ca31476e8f7ebd8cb442402.tar.bz2 libblake-611f60b5fbc14f0c2ca31476e8f7ebd8cb442402.tar.xz | |
libblake_init: return before locking if already initialised (check-lock-check)
Signed-off-by: Mattias Andrée <maandree@kth.se>
| -rw-r--r-- | libblake_init.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libblake_init.c b/libblake_init.c index 84dd87e..0276cd2 100644 --- a/libblake_init.c +++ b/libblake_init.c @@ -15,6 +15,9 @@ libblake_init(void) static volatile int initialised = 0; static volatile atomic_flag spinlock = ATOMIC_FLAG_INIT; + if (initialised) + return; + while (atomic_flag_test_and_set(&spinlock)); if (!initialised) { |