From b0b0ea07bb3a24aa336e0145482f37df358918d6 Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Mon, 29 Nov 2004 13:27:56 +0000
Subject: [PATCH] Add in some methods for use by the JIT.
 LoadLibraryPermanently brings the library into the address space permanently.
 SearchForAddressOfSymbol looks in all previously permanently loaded libraries
 and any currently open libraries for a symbol, instead of just one library
 like GetAddressOfSymbol

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18354 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/System/DynamicLibrary.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/include/llvm/System/DynamicLibrary.h b/include/llvm/System/DynamicLibrary.h
index d8535284eb9..6f1ebb59911 100644
--- a/include/llvm/System/DynamicLibrary.h
+++ b/include/llvm/System/DynamicLibrary.h
@@ -56,6 +56,31 @@ namespace sys {
       /// @brief Closes the DynamicLibrary
       ~DynamicLibrary();
 
+    /// @}
+    /// @name Functions
+    /// @{
+    public:
+      /// This function allows a library to be loaded without instantiating a
+      /// DynamicLibrary object. Consequently, it is marked as being permanent
+      /// and will only be unloaded when the program terminates.
+      /// @throws std::string on error.
+      /// @brief Open a dynamic library permanently.
+      static void LoadLibraryPermanently(const char* filename);
+
+      /// This function will search through all previously loaded dynamic
+      /// libraries for the symbol \p symbolName. If it is found, the addressof
+      /// that symbol is returned. If not, null is returned. Note that this will
+      /// search permanently loaded libraries (LoadLibraryPermanently) as well
+      /// as ephemerally loaded libraries (constructors).
+      /// @throws std::string on error.
+      /// @brief Search through libraries for address of a symbol
+      static void* SearchForAddressOfSymbol(const char* symbolName);
+
+      /// @brief Convenience function for C++ophiles.
+      static void* SearchForAddressOfSymbol(const std::string& symbolName) {
+        return SearchForAddressOfSymbol(symbolName.c_str());
+      }
+
     /// @}
     /// @name Accessors
     /// @{