Create a HostThread abstraction.

This patch moves creates a thread abstraction that represents a
thread running inside the LLDB process.  This is a replacement for
otherwise using lldb::thread_t, and provides a platform agnostic
interface to managing these threads.

Differential Revision: http://reviews.llvm.org/D5198

Reviewed by: Jim Ingham

llvm-svn: 217460

1 files changed, 48 insertions, 0 deletions

diff --git a/lldb/source/Host/common/ThreadLauncher.cpp b/lldb/source/Host/common/ThreadLauncher.cpp
new file mode 100644
index 00000000000..350d4491b6c
--- /dev/null
+++ b/lldb/source/Host/common/ThreadLauncher.cpp
@@ -0,0 +1,48 @@
+//===-- ThreadLauncher.cpp ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// lldb Includes
+#include "lldb/Core/Log.h"
+#include "lldb/Host/HostNativeThread.h"
+#include "lldb/Host/HostThread.h"
+#include "lldb/Host/ThisThread.h"
+#include "lldb/Host/ThreadLauncher.h"
+
+#if defined(_WIN32)
+#include "lldb/Host/windows/windows.h"
+#endif
+
+using namespace lldb;
+using namespace lldb_private;
+
+HostThread
+ThreadLauncher::LaunchThread(llvm::StringRef name, lldb::thread_func_t thread_function, lldb::thread_arg_t thread_arg, Error *error_ptr)
+{
+    Error error;
+    if (error_ptr)
+        error_ptr->Clear();
+
+    // Host::ThreadCreateTrampoline will delete this pointer for us.
+    HostThreadCreateInfo *info_ptr = new HostThreadCreateInfo(name.data(), thread_function, thread_arg);
+    lldb::thread_t thread;
+#ifdef _WIN32
+    thread = (lldb::thread_t)::_beginthreadex(0, 0, HostNativeThread::ThreadCreateTrampoline, info_ptr, 0, NULL);
+    if (thread == (lldb::thread_t)(-1L))
+        error.SetError(::GetLastError(), eErrorTypeWin32);
+#else
+    int err = ::pthread_create(&thread, NULL, HostNativeThread::ThreadCreateTrampoline, info_ptr);
+    error.SetError(err, eErrorTypePOSIX);
+#endif
+    if (error_ptr)
+        *error_ptr = error;
+    if (!error.Success())
+        thread = LLDB_INVALID_HOST_THREAD;
+
+    return HostThread(thread);
+}