[UI] Loop thread to main thread WindowedAppContext

src/xenia/base/console_win.cc

@@ -0,0 +1,60 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2021 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <fcntl.h>
+#include <io.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "xenia/base/console.h"
+#include "xenia/base/platform_win.h"
+
+namespace xe {
+
+// TODO(Triang3l): Set the default depending on the actual subsystem. Currently
+// it inhibits message boxes.
+static bool has_console_attached_ = true;
+
+bool has_console_attached() { return has_console_attached_; }
+
+static bool has_shell_environment_variable() {
+  size_t size = 0;
+  // Check if SHELL exists
+  // If it doesn't, then we are in a Windows Terminal
+  auto error = getenv_s(&size, nullptr, 0, "SHELL");
+  if (error) {
+    return false;
+  }
+  return !!size;
+}
+
+void AttachConsole() {
+  bool has_console = ::AttachConsole(ATTACH_PARENT_PROCESS) == TRUE;
+  if (!has_console || !has_shell_environment_variable()) {
+    // We weren't launched from a console, so just return.
+    has_console_attached_ = false;
+    return;
+  }
+
+  AllocConsole();
+
+  has_console_attached_ = true;
+
+  auto std_handle = (intptr_t)GetStdHandle(STD_OUTPUT_HANDLE);
+  auto con_handle = _open_osfhandle(std_handle, _O_TEXT);
+  auto fp = _fdopen(con_handle, "w");
+  freopen_s(&fp, "CONOUT$", "w", stdout);
+
+  std_handle = (intptr_t)GetStdHandle(STD_ERROR_HANDLE);
+  con_handle = _open_osfhandle(std_handle, _O_TEXT);
+  fp = _fdopen(con_handle, "w");
+  freopen_s(&fp, "CONOUT$", "w", stderr);
+}
+
+}  // namespace xe