[llvm-commits] CVS: llvm/lib/System/Unix/DynamicLibrary.cpp

[Reid Spencer]

Changes in directory llvm/lib/System/Unix:

DynamicLibrary.cpp added (r1.1)
---
Log message:

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.


---
Diffs of the changes:  (+47 -0)

Index: llvm/lib/System/Unix/DynamicLibrary.cpp
diff -c /dev/null llvm/lib/System/Unix/DynamicLibrary.cpp:1.1
*** /dev/null	Wed Nov 17 22:33:50 2004
--- llvm/lib/System/Unix/DynamicLibrary.cpp	Wed Nov 17 22:33:40 2004
***************
*** 0 ****
--- 1,47 ----
+ //===- Unix/DynamicLibrary.cpp - Generic UNIX Dynamic Library ---*- 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 implements the generic UNIX variant of DynamicLibrary
+ //
+ //===----------------------------------------------------------------------===//
+ 
+ #include "Unix.h"
+ 
+ namespace llvm {
+ using namespace sys;
+ 
+ 
+ DynamicLibrary::DynamicLibrary(const char *filename) {
+ #if defined (HAVE_DLOPEN)
+   if ((handle = dlopen (filename, RTLD_NOW | RTLD_GLOBAL)) == 0)
+     throw std::string( dlerror() );
+ #else
+   assert (!"Dynamic object linking not implemented for this platform");
+ #endif
+ }
+ 
+ DynamicLibrary::~DynamicLibrary() {
+   assert(handle != 0 && "Invalid DynamicLibrary handle");
+ #if defined (HAVE_DLOPEN)
+   dlclose(handle);
+ #else
+   assert (!"Dynamic object linking not implemented for this platform");
+ #endif
+ }
+ 
+ void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+   assert(handle != 0 && "Invalid DynamicLibrary handle");
+ #if defined(HAVE_DLOPEN)
+     return dlsym (handle, symbolName);
+ #else
+   assert (0 && "Dynamic symbol lookup not implemented for this platform");
+ #endif
+ }
+ 
+ }