Dynamic Library abstraction. This makes the abstraction of a single dynamic

library (shared library/shared object) whose symbols can be looked up
dynamically. Used for plug-ins.

llvm-svn: 17940

1 files changed, 47 insertions, 0 deletions

diff --git a/llvm/lib/System/Win32/DynamicLibrary.cpp b/llvm/lib/System/Win32/DynamicLibrary.cpp
new file mode 100644
index 00000000000..15730d43a01
--- /dev/null
+++ b/llvm/lib/System/Win32/DynamicLibrary.cpp
@@ -0,0 +1,47 @@
+//===- Win32/DynamicLibrary.cpp - Win32 DL Implementation -------*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Reid Spencer and is distributed under the 
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file provides the Win32 specific implementation of the DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+#include "Win32.h"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code 
+//===          and must not be UNIX code
+//===----------------------------------------------------------------------===//
+
+DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
+  handle = LoadLibrary(filename);
+
+  if (handle == 0) {
+    char Buffer[100];
+    // FIXME: This should use FormatMessage
+    sprintf(Buffer, "Windows error code %d\n", GetLastError());
+    throw std::string(Buffer);
+  }
+}
+
+DynamicLibrary::~DynamicLibrary() {
+  if (handle)
+    FreeLibrary(handle);
+}
+
+void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+  assert(handle !=0 && "Invalid DynamicLibrary handle");
+  return GetProcAddress(handle, symbolName);
+}
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab