Initial import of lldb

Change-Id: Ib244e837bee349effa12b2ff6ffffbe3d730e929

external/bsd/llvm/dist/lldb/source/Host/common/ProcessRunLock.cpp

@@ -0,0 +1,71 @@
+#ifndef _WIN32
+
+#include "lldb/Host/ProcessRunLock.h"
+
+namespace lldb_private {
+
+    ProcessRunLock::ProcessRunLock()
+        : m_running(false)
+    {
+        int err = ::pthread_rwlock_init(&m_rwlock, NULL); (void) err;
+        //#if LLDB_CONFIGURATION_DEBUG
+        //        assert(err == 0);
+        //#endif
+    }
+
+    ProcessRunLock::~ProcessRunLock()
+    {
+        int err = ::pthread_rwlock_destroy(&m_rwlock); (void) err;
+        //#if LLDB_CONFIGURATION_DEBUG
+        //        assert(err == 0);
+        //#endif
+    }
+
+    bool ProcessRunLock::ReadTryLock()
+    {
+        ::pthread_rwlock_rdlock(&m_rwlock);
+        if (m_running == false)
+        {
+            return true;
+        }
+        ::pthread_rwlock_unlock(&m_rwlock);
+        return false;
+    }
+
+    bool ProcessRunLock::ReadUnlock()
+    {
+        return ::pthread_rwlock_unlock(&m_rwlock) == 0;
+    }
+
+    bool ProcessRunLock::SetRunning()
+    {
+        ::pthread_rwlock_wrlock(&m_rwlock);
+        m_running = true;
+        ::pthread_rwlock_unlock(&m_rwlock);
+        return true;
+    }
+
+    bool ProcessRunLock::TrySetRunning()
+    {
+        bool r;
+
+        if (::pthread_rwlock_trywrlock(&m_rwlock) == 0)
+        {
+            r = !m_running;
+            m_running = true;
+            ::pthread_rwlock_unlock(&m_rwlock);
+            return r;
+        }
+        return false;
+    }
+
+    bool ProcessRunLock::SetStopped()
+    {
+        ::pthread_rwlock_wrlock(&m_rwlock);
+        m_running = false;
+        ::pthread_rwlock_unlock(&m_rwlock);
+        return true;
+    }
+}
+
+#endif