ENH: Cleanup DynamicLoader so that the symbols have more consistent names, start using dynamic loader from kwsys in CMake

1 files changed, 26 insertions, 240 deletions

diff --git a/Source/cmDynamicLoader.cxx b/Source/cmDynamicLoader.cxx
index 1a05060..d1b1510 100644
--- a/Source/cmDynamicLoader.cxx
+++ b/Source/cmDynamicLoader.cxx
@@ -9,34 +9,26 @@
   Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
   See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
 
-     This software is distributed WITHOUT ANY WARRANTY; without even 
-     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
      PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
 #include "cmDynamicLoader.h"
 
-// This file is actually several different implementations.
-// 1. HP machines which uses shl_load
-// 2. Mac OS X 10.2.x and earlier which uses NSLinkModule
-// 3. Windows which uses LoadLibrary
-// 4. Most unix systems (including Mac OS X 10.3 and later) which use dlopen (default)
-// Each part of the ifdef contains a complete implementation for
-// the static methods of cmDynamicLoader.  
-
-
-class cmDynamicLoaderCache 
+class cmDynamicLoaderCache
 {
 public:
   ~cmDynamicLoaderCache();
-  void CacheFile(const char* path, const cmLibHandle&);
-  bool GetCacheFile(const char* path, cmLibHandle&);
+  void CacheFile(const char* path,
+    const cmsys::DynamicLoader::LibraryHandle&);
+  bool GetCacheFile(const char* path, cmsys::DynamicLoader::LibraryHandle&);
   bool FlushCache(const char* path);
   void FlushCache();
   static cmDynamicLoaderCache* GetInstance();
 
 private:
-  std::map<cmStdString, cmLibHandle> CacheMap;
+  std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle> CacheMap;
   static cmDynamicLoaderCache* Instance;
 };
 
@@ -46,9 +38,10 @@ cmDynamicLoaderCache::~cmDynamicLoaderCache()
 {
 }
 
-void cmDynamicLoaderCache::CacheFile(const char* path, const cmLibHandle& p)
+void cmDynamicLoaderCache::CacheFile(const char* path,
+  const cmsys::DynamicLoader::LibraryHandle& p)
 {
-  cmLibHandle h;
+  cmsys::DynamicLoader::LibraryHandle h;
   if ( this->GetCacheFile(path, h) )
     {
     this->FlushCache(path);
@@ -56,9 +49,11 @@ void cmDynamicLoaderCache::CacheFile(const char* path, const cmLibHandle& p)
   this->CacheMap[path] = p;
 }
 
-bool cmDynamicLoaderCache::GetCacheFile(const char* path, cmLibHandle& p)
+bool cmDynamicLoaderCache::GetCacheFile(const char* path,
+  cmsys::DynamicLoader::LibraryHandle& p)
 {
-  std::map<cmStdString, cmLibHandle>::iterator it = this->CacheMap.find(path);
+  std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle>::iterator it
+    = this->CacheMap.find(path);
   if ( it != this->CacheMap.end() )
     {
     p = it->second;
@@ -69,11 +64,12 @@ bool cmDynamicLoaderCache::GetCacheFile(const char* path, cmLibHandle& p)
 
 bool cmDynamicLoaderCache::FlushCache(const char* path)
 {
-  std::map<cmStdString, cmLibHandle>::iterator it = this->CacheMap.find(path);
+  std::map<cmStdString, cmsys::DynamicLoader::LibraryHandle>::iterator it
+    = this->CacheMap.find(path);
   bool ret = false;
   if ( it != this->CacheMap.end() )
     {
-    cmDynamicLoader::CloseLibrary(it->second);
+    cmsys::DynamicLoader::CloseLibrary(it->second);
     this->CacheMap.erase(it);
     ret = true;
     }
@@ -82,10 +78,12 @@ bool cmDynamicLoaderCache::FlushCache(const char* path)
 
 void cmDynamicLoaderCache::FlushCache()
 {
-  for ( std::map<cmStdString, cmLibHandle>::iterator it = this->CacheMap.begin();
+  for ( std::map<cmStdString,
+    cmsys::DynamicLoader::LibraryHandle>::iterator it
+    = this->CacheMap.begin();
         it != this->CacheMap.end(); it++ )
     {
-    cmDynamicLoader::CloseLibrary(it->second);
+    cmsys::DynamicLoader::CloseLibrary(it->second);
     }
   delete cmDynamicLoaderCache::Instance;
   cmDynamicLoaderCache::Instance = 0;
@@ -100,231 +98,19 @@ cmDynamicLoaderCache* cmDynamicLoaderCache::GetInstance()
   return cmDynamicLoaderCache::Instance;
 }
 
-// ---------------------------------------------------------------
-// 1. Implementation for HPUX  machines
-#ifdef __hpux
-#define CMDYNAMICLOADER_DEFINED 1
-#include <dl.h>
-
-cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
+cmsys::DynamicLoader::LibraryHandle cmDynamicLoader::OpenLibrary(
+  const char* libname )
 {
-  cmLibHandle lh;
+  cmsys::DynamicLoader::LibraryHandle lh;
   if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
     {
     return lh;
     }
-  
-  lh = shl_load(libname, BIND_DEFERRED | DYNAMIC_PATH, 0L);
+  lh = cmsys::DynamicLoader::OpenLibrary(libname);
   cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
   return lh;
 }
 
-int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
-{
-  return !shl_unload(lib);
-}
-
-cmDynamicLoaderFunction
-cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
-{ 
-  void* addr;
-  int status;
-  
-  status = shl_findsym (&lib, sym, TYPE_PROCEDURE, &addr);
-  void* result = (status < 0) ? (void*)0 : addr;
-  
-  // Hack to cast pointer-to-data to pointer-to-function.
-  return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
-}
-
-
-const char* cmDynamicLoader::LastError()
-{
-  return 0;
-}
-#endif
-
-
-
-// ---------------------------------------------------------------
-// 2. Implementation for Mac OS X 10.2.x and earlier
-#ifdef __APPLE__
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-#define CMDYNAMICLOADER_DEFINED 1
-#include <mach-o/dyld.h>
-
-cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
-{
-  cmLibHandle lh;
-  if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
-    {
-    return lh;
-    }
-  
-  NSObjectFileImageReturnCode rc;
-  NSObjectFileImage image = 0;
-
-  rc = NSCreateObjectFileImageFromFile(libname, &image);
-  if(!image)
-    {
-    return 0;
-    }
-  lh = NSLinkModule(image, libname, NSLINKMODULE_OPTION_BINDNOW);
-  if(lh)
-    {
-    cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
-    }
-  return lh;
-}
-
-int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
-{
-  NSUnLinkModule((NSModule)lib, NSUNLINKMODULE_OPTION_NONE);
-  return 1;
-}
-
-cmDynamicLoaderFunction
-cmDynamicLoader::GetSymbolAddress(cmLibHandle /* lib */, const char* sym)
-{
-  void *result=0;
-  if(NSIsSymbolNameDefined(sym))
-    {
-    NSSymbol symbol= NSLookupAndBindSymbol(sym);
-    if(symbol)
-      {
-      result = NSAddressOfSymbol(symbol);
-      }
-    }
-  // Hack to cast pointer-to-data to pointer-to-function.
-  return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
-}
-
-const char* cmDynamicLoader::LastError()
-{
-  return 0;
-}
-
-#endif
-#endif
-
-
-
-
-// ---------------------------------------------------------------
-// 3. Implementation for Windows win32 code
-#ifdef _WIN32
-#include <windows.h>
-#define CMDYNAMICLOADER_DEFINED 1
-
-cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
-{
-  cmLibHandle lh;
-  if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
-    {
-    return lh;
-    }
-#ifdef UNICODE
-  wchar_t *libn = new wchar_t [mbstowcs(NULL, libname, 32000)];
-  mbstowcs(libn, libname, 32000);
-  cmLibHandle ret = LoadLibrary(libn);
-  delete [] libn;
-  lh = ret;
-#else
-  lh = LoadLibrary(libname);
-#endif
-  
-  cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
-  return lh;
-}
-
-int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
-{
-  return (int)FreeLibrary(lib);
-}
-
-cmDynamicLoaderFunction
-cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
-{ 
-#ifdef UNICODE
-  wchar_t *wsym = new wchar_t [mbstowcs(NULL, sym, 32000)];
-  mbstowcs(wsym, sym, 32000);
-  void *ret = GetProcAddress(lib, wsym);
-  delete [] wsym;
-  void* result = ret;
-#else
-  void* result = (void*)GetProcAddress(lib, sym);
-#endif
-  // Hack to cast pointer-to-data to pointer-to-function.
-  return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
-}
-
-
-const char* cmDynamicLoader::LastError()
-{
-  LPVOID lpMsgBuf;
-
-  FormatMessage( 
-                FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
-                NULL,
-                GetLastError(),
-                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
-                (LPTSTR) &lpMsgBuf,
-                0,
-                NULL 
-                );
-  
-  // Free the buffer.
- 
-  static char* str = 0;
-  delete [] str;
-  str = strcpy(new char[strlen((char*)lpMsgBuf)+1], (char*)lpMsgBuf); 
-  LocalFree( lpMsgBuf );
-  return str;
-}
-
-#endif
-
-// ---------------------------------------------------------------
-// 4. Implementation for default UNIX machines.
-// if nothing has been defined then use this
-#ifndef CMDYNAMICLOADER_DEFINED
-#define CMDYNAMICLOADER_DEFINED 1
-// Setup for most unix machines
-#include <dlfcn.h>
-
-cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
-{
-  cmLibHandle lh;
-  if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
-    {
-    return lh;
-    }
-  
-  lh = dlopen(libname, RTLD_LAZY);
-  cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
-  return lh;
-}
-
-int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
-{
-  return !(int)dlclose(lib);
-}
-
-cmDynamicLoaderFunction
-cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
-{ 
-  void* result = dlsym(lib, sym);
-  
-  // Hack to cast pointer-to-data to pointer-to-function.
-  return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
-}
-
-const char* cmDynamicLoader::LastError()
-{
-  return dlerror(); 
-}
-#endif
-
 void cmDynamicLoader::FlushCache()
 {
   cmDynamicLoaderCache::GetInstance()->FlushCache();
@@ -333,7 +119,7 @@ void cmDynamicLoader::FlushCache()
 // Stay consistent with the Modules/Platform directory as
 // to what the correct prefix and lib extension
 const char* cmDynamicLoader::LibPrefix()
-{ 
+{
   return CMAKE_SHARED_MODULE_PREFIX;
 }