Refactor shader cache (#2558)

* Fix a bug in Path::find

* Fix code formatting

* Fix LockFile and add LockFileGuard

* Add PersistentCache and unit test

* Replace file path dependency list with source file dependency list

* Add note on ordering in Module/FileDependencyList

* Remove old shader cache code

* Refactor shader cache implementation

* Temporarily skip unit tests reading/writing files

* Fix warning

* Reenable lock file test

* Rename shader cache tests and disable crashing test

* Testing

* Stop using Path::getCanonical

* Fix persistent cache lock and test

* Fix threading issues

* Move adding file dependency hashes to getEntryPointHash()

* Fix handling of #include files

* Allow specifying additional search paths for gfx testing device

* Work on shader cache tests

* Update project files

* Revive shader cache graphics tests

* Split graphics pipeline test

* Fix compilation

1 files changed, 25 insertions, 2 deletions

diff --git a/source/core/slang-io.h b/source/core/slang-io.h
index fc5cbfa9d..e766359ff 100644
--- a/source/core/slang-io.h
+++ b/source/core/slang-io.h
@@ -266,9 +266,9 @@ namespace Slang
 
     private:
         LockFile(const LockFile&) = delete;
-        LockFile(LockFile&) = delete;
+        LockFile(LockFile&&) = delete;
         LockFile& operator=(const LockFile&) = delete;
-        LockFile& operator=(const LockFile&&) = delete;
+        LockFile& operator=(LockFile&&) = delete;
 
 #if SLANG_WINDOWS_FAMILY
         void* m_fileHandle;
@@ -278,6 +278,29 @@ namespace Slang
         bool m_isOpen;
     };
 
+    class LockFileGuard
+    {
+    public:
+        LockFileGuard(LockFile& lockFile, LockFile::LockType lockType = LockFile::LockType::Exclusive)
+            : m_lockFile(lockFile)
+        {
+            m_lockFile.lock(lockType);
+        }
+
+        ~LockFileGuard()
+        {
+            m_lockFile.unlock();
+        }
+
+    private:
+        LockFileGuard(const LockFileGuard&) = delete;
+        LockFileGuard(LockFileGuard&&) = delete;
+        LockFileGuard& operator=(const LockFileGuard&) = delete;
+        LockFileGuard& operator=(LockFileGuard&&) = delete;
+
+        LockFile& m_lockFile;
+    };
+
 }
 
 #endif