1 files changed, 25 insertions, 0 deletions
diff --git a/src/w32-lock.c b/src/w32-lock.c
index 3aac1ae..8c086f9 100644
--- a/src/w32-lock.c
+++ b/src/w32-lock.c
@@ -72,6 +72,7 @@ _gpgrt_lock_init (gpgrt_lock_t *lockhd)
 
   InitializeCriticalSection (&lock->csec);
   lock->initdone = 1;
+  return 0;
 }
 
 
@@ -106,6 +107,30 @@ _gpgrt_lock_lock (gpgrt_lock_t *lockhd)
 
 
 gpg_err_code_t
+_gpgrt_lock_trylock (gpgrt_lock_t *lockhd)
+{
+  _gpgrt_lock_t *lock = get_lock_object (lockhd);
+
+  if (!lock->initdone)
+    {
+      if (!InterlockedIncrement (&lock->started))
+        {
+          gpgrt_lock_init (lockhd);
+        }
+      else
+        {
+          while (!lock->initdone)
+            Sleep (0);
+        }
+    }
+
+  if (!TryEnterCriticalSection (&lock->csec))
+    return GPG_ERR_EBUSY;
+  return 0;
+}
+
+
+gpg_err_code_t
 _gpgrt_lock_unlock (gpgrt_lock_t *lockhd)
 {
   _gpgrt_lock_t *lock = get_lock_object (lockhd);