lib/utils: X- versions for pthread_mutex_{lock,unlock}

Mutex lock/unlock should not fail if mutex was correctly initialized/used.

include/wendelin/utils.h

@@ -22,6 +22,7 @@
 
 #include <ccan/build_assert/build_assert.h>
 #include <stdlib.h>
+#include <pthread.h>
 
 
 /* compile-time exact ilog2(x); x must be 2^k */
@@ -79,4 +80,7 @@ void xsigaddset(sigset_t *set, int sig);
 int  xsigismember(const sigset_t *set, int sig);
 void xpthread_sigmask(int how, const sigset_t *set, sigset_t *oldset);
 
+void xpthread_mutex_lock(pthread_mutex_t *);
+void xpthread_mutex_unlock(pthread_mutex_t *);
+
 #endif

lib/utils.c

@@ -141,3 +141,21 @@ void xpthread_sigmask(int how, const sigset_t *set, sigset_t *oldset)
     if (err)
         BUGerr(err);
 }
+
+
+/* mutex lock/unlock should not fail if mutex was correctly initialized/used */
+void xpthread_mutex_lock(pthread_mutex_t *lock)
+{
+    int err;
+    err = pthread_mutex_lock(lock);
+    if (err)
+        BUGerr(err);
+}
+
+void xpthread_mutex_unlock(pthread_mutex_t *lock)
+{
+    int err;
+    err = pthread_mutex_unlock(lock);
+    if (err)
+        BUGerr(err);
+}