diff --git a/util/mutex.h b/util/mutex.h
index e2a8715..4031804 100644
--- a/util/mutex.h
+++ b/util/mutex.h
@@ -28,10 +28,10 @@
 #if defined(MUTEX_IS_WIN32_SRWLOCK)
 #include <windows.h>
 typedef SRWLOCK MutexType;
-#elif defined(MUTEX_IS_PTHREAD_RWLOCK)
-#include <pthread.h>
-#include <stdlib.h>
-typedef pthread_rwlock_t MutexType;
+// #elif defined(MUTEX_IS_PTHREAD_RWLOCK)
+// #include <pthread.h>
+// #include <stdlib.h>
+// typedef pthread_rwlock_t MutexType;
 #else
 #include <mutex>
 typedef std::mutex MutexType;
@@ -73,21 +73,21 @@ void Mutex::Unlock()       { ReleaseSRWLockExclusive(&mutex_); }
 void Mutex::ReaderLock()   { AcquireSRWLockShared(&mutex_); }
 void Mutex::ReaderUnlock() { ReleaseSRWLockShared(&mutex_); }
 
-#elif defined(MUTEX_IS_PTHREAD_RWLOCK)
+// #elif defined(MUTEX_IS_PTHREAD_RWLOCK)
 
-#define SAFE_PTHREAD(fncall)    \
-  do {                          \
-    if ((fncall) != 0) abort(); \
-  } while (0)
+// #define SAFE_PTHREAD(fncall)    \
+//   do {                          \
+//     if ((fncall) != 0) abort(); \
+//   } while (0)
 
-Mutex::Mutex()             { SAFE_PTHREAD(pthread_rwlock_init(&mutex_, NULL)); }
-Mutex::~Mutex()            { SAFE_PTHREAD(pthread_rwlock_destroy(&mutex_)); }
-void Mutex::Lock()         { SAFE_PTHREAD(pthread_rwlock_wrlock(&mutex_)); }
-void Mutex::Unlock()       { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
-void Mutex::ReaderLock()   { SAFE_PTHREAD(pthread_rwlock_rdlock(&mutex_)); }
-void Mutex::ReaderUnlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
+// Mutex::Mutex()             { SAFE_PTHREAD(pthread_rwlock_init(&mutex_, NULL)); }
+// Mutex::~Mutex()            { SAFE_PTHREAD(pthread_rwlock_destroy(&mutex_)); }
+// void Mutex::Lock()         { SAFE_PTHREAD(pthread_rwlock_wrlock(&mutex_)); }
+// void Mutex::Unlock()       { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
+// void Mutex::ReaderLock()   { SAFE_PTHREAD(pthread_rwlock_rdlock(&mutex_)); }
+// void Mutex::ReaderUnlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
 
-#undef SAFE_PTHREAD
+// #undef SAFE_PTHREAD
 
 #else