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Avoid a race condition if another thread happens to remove the error

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state at the same time.
This commit is contained in:
Richard Levitte 2000-07-25 16:56:39 +00:00
parent ccb9aae905
commit 34f0fe9de0
1 changed files with 8 additions and 5 deletions
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13
crypto/err/err.c
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@ -652,12 +652,15 @@ void ERR_remove_state(unsigned long pid)
pid=(unsigned long)CRYPTO_thread_id(); pid=(unsigned long)CRYPTO_thread_id();
tmp.pid=pid; tmp.pid=pid;
CRYPTO_w_lock(CRYPTO_LOCK_ERR); CRYPTO_w_lock(CRYPTO_LOCK_ERR);
p=(ERR_STATE *)lh_delete(thread_hash,&tmp); if (thread_hash)
if (lh_num_items(thread_hash) == 0)
{ {
/* make sure we don't leak memory */ p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
lh_free(thread_hash); if (lh_num_items(thread_hash) == 0)
thread_hash = NULL; {
/* make sure we don't leak memory */
lh_free(thread_hash);
thread_hash = NULL;
}
} }
CRYPTO_w_unlock(CRYPTO_LOCK_ERR); CRYPTO_w_unlock(CRYPTO_LOCK_ERR);