From c151774911b4ea658410cc6593dd40390862a168 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Mon, 16 Mar 2020 17:19:24 +0300
Subject: DbgHelp: start fixing the API

---
 include/pdb/dbghelp.hpp | 31 +++++++++++++++++++++++++------
 include/pdb/repo.hpp    |  2 +-
 2 files changed, 26 insertions(+), 7 deletions(-)

(limited to 'include')

diff --git a/include/pdb/dbghelp.hpp b/include/pdb/dbghelp.hpp
index af10789..328df2d 100644
--- a/include/pdb/dbghelp.hpp
+++ b/include/pdb/dbghelp.hpp
@@ -18,10 +18,14 @@ namespace pdb {
 
 class DbgHelp {
 public:
-    DbgHelp(bool invade_current_process = false);
-    ~DbgHelp();
+    static DbgHelp current_process() { return DbgHelp{true}; }
+    static DbgHelp post_mortem() { return DbgHelp{false}; }
 
-    void close();
+    void swap(DbgHelp& other) noexcept;
+
+    DbgHelp(DbgHelp&& other) noexcept;
+    DbgHelp& operator=(DbgHelp) noexcept;
+    ~DbgHelp();
 
     ModuleInfo load_pdb(const std::string& path) const;
 
@@ -43,11 +47,26 @@ public:
     LineInfo resolve_line(Address) const;
 
 private:
-    const HANDLE id = GetCurrentProcess();
-    bool closed = false;
+    explicit DbgHelp(bool invade_current_process);
+
+    void close();
+
+    HANDLE id = GetCurrentProcess();
 
     DbgHelp(const DbgHelp&) = delete;
-    DbgHelp& operator=(const DbgHelp&) = delete;
 };
 
+inline void swap(DbgHelp& a, DbgHelp& b) noexcept {
+    a.swap(b);
+}
+
 } // namespace pdb
+
+namespace std {
+
+template <>
+inline void swap(pdb::DbgHelp& a, pdb::DbgHelp& b) noexcept {
+    a.swap(b);
+}
+
+} // namespace std
diff --git a/include/pdb/repo.hpp b/include/pdb/repo.hpp
index 8bc5596..74a86a8 100644
--- a/include/pdb/repo.hpp
+++ b/include/pdb/repo.hpp
@@ -47,7 +47,7 @@ private:
     Address address_offline_to_online(Address) const;
     Address address_online_to_offline(Address) const;
 
-    const DbgHelp dbghelp;
+    const DbgHelp dbghelp{DbgHelp::post_mortem()};
 
     std::unordered_set<file::ID> file_ids;
     std::map<Address, Module> online_bases;
-- 
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