1 files changed, 64 insertions, 0 deletions

diff --git a/contrib/llvm-project/lldb/source/Host/common/ProcessRunLock.cpp b/contrib/llvm-project/lldb/source/Host/common/ProcessRunLock.cpp
new file mode 100644
index 000000000000..a931da718766
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Host/common/ProcessRunLock.cpp
@@ -0,0 +1,64 @@
+//===-- ProcessRunLock.cpp --------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _WIN32
+#include "lldb/Host/ProcessRunLock.h"
+
+namespace lldb_private {
+
+ProcessRunLock::ProcessRunLock() : m_running(false) {
+  int err = ::pthread_rwlock_init(&m_rwlock, nullptr);
+  (void)err;
+}
+
+ProcessRunLock::~ProcessRunLock() {
+  int err = ::pthread_rwlock_destroy(&m_rwlock);
+  (void)err;
+}
+
+bool ProcessRunLock::ReadTryLock() {
+  ::pthread_rwlock_rdlock(&m_rwlock);
+  if (!m_running) {
+    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