rfc3961: Add a kernel rfc3961 implementation

[openafs.git] / src / crypto / hcrypto / heim_threads.h

diff --git a/src/crypto/hcrypto/heim_threads.h b/src/crypto/hcrypto/heim_threads.h
index 9410897..fe85b5b 100644 (file)
--- a/src/crypto/hcrypto/heim_threads.h
+++ b/src/crypto/hcrypto/heim_threads.h
@@ -1,3 +1,4 @@
+#ifdef AFS_PTHREAD_ENV
 #include <pthread.h>
 
 #define HEIMDAL_MUTEX pthread_mutex_t
@@ -6,3 +7,17 @@
 #define HEIMDAL_MUTEX_lock(m) pthread_mutex_lock(m)
 #define HEIMDAL_MUTEX_unlock(m) pthread_mutex_unlock(m)
 #define HEIMDAL_MUTEX_destroy(m) pthread_mutex_destroy(m)
+#else
+/* The one location in hcrypto which uses mutexes is the PRNG
+ * code. As this code takes no locks, never yields, and does no
+ * I/O through the LWP IO Manager, it cannot be pre-empted, so
+ * it is safe to simply remove the locks in this case
+ */
+#define HEIMDAL_MUTEX int
+#define HEIMDAL_MUTEX_INITIALIZER 0
+#define HEIMDAL_MUTEX_init(m) do { (void)(m); } while(0)
+#define HEIMDAL_MUTEX_lock(m) do { (void)(m); } while(0)
+#define HEIMDAL_MUTEX_unlock(m) do { (void)(m); } while(0)
+#define HEIMDAL_MUTEX_destroy(m) do { (void)(m); } while(0)
+#endif
+