Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 81 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Host/windows/ProcessRunLock.cpp b/gnu/llvm/lldb/source/Host/windows/ProcessRunLock.cpp
new file mode 100644
index 00000000000..85df7826f16
--- /dev/null
+++ b/gnu/llvm/lldb/source/Host/windows/ProcessRunLock.cpp
@@ -0,0 +1,81 @@
+//===-- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Host/ProcessRunLock.h"
+#include "lldb/Host/windows/windows.h"
+
+static PSRWLOCK GetLock(lldb::rwlock_t lock) {
+  return static_cast<PSRWLOCK>(lock);
+}
+
+static bool ReadLock(lldb::rwlock_t rwlock) {
+  ::AcquireSRWLockShared(GetLock(rwlock));
+  return true;
+}
+
+static bool ReadUnlock(lldb::rwlock_t rwlock) {
+  ::ReleaseSRWLockShared(GetLock(rwlock));
+  return true;
+}
+
+static bool WriteLock(lldb::rwlock_t rwlock) {
+  ::AcquireSRWLockExclusive(GetLock(rwlock));
+  return true;
+}
+
+static bool WriteTryLock(lldb::rwlock_t rwlock) {
+  return !!::TryAcquireSRWLockExclusive(GetLock(rwlock));
+}
+
+static bool WriteUnlock(lldb::rwlock_t rwlock) {
+  ::ReleaseSRWLockExclusive(GetLock(rwlock));
+  return true;
+}
+
+using namespace lldb_private;
+
+ProcessRunLock::ProcessRunLock() : m_running(false) {
+  m_rwlock = new SRWLOCK;
+  InitializeSRWLock(GetLock(m_rwlock));
+}
+
+ProcessRunLock::~ProcessRunLock() { delete static_cast<SRWLOCK *>(m_rwlock); }
+
+bool ProcessRunLock::ReadTryLock() {
+  ::ReadLock(m_rwlock);
+  if (m_running == false)
+    return true;
+  ::ReadUnlock(m_rwlock);
+  return false;
+}
+
+bool ProcessRunLock::ReadUnlock() { return ::ReadUnlock(m_rwlock); }
+
+bool ProcessRunLock::SetRunning() {
+  WriteLock(m_rwlock);
+  m_running = true;
+  WriteUnlock(m_rwlock);
+  return true;
+}
+
+bool ProcessRunLock::TrySetRunning() {
+  if (WriteTryLock(m_rwlock)) {
+    bool was_running = m_running;
+    m_running = true;
+    WriteUnlock(m_rwlock);
+    return !was_running;
+  }
+  return false;
+}
+
+bool ProcessRunLock::SetStopped() {
+  WriteLock(m_rwlock);
+  m_running = false;
+  WriteUnlock(m_rwlock);
+  return true;
+}