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      1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/native_library.h"
      6 
      7 #include <dlfcn.h>
      8 #import <Carbon/Carbon.h>
      9 
     10 #include "base/file_path.h"
     11 #include "base/file_util.h"
     12 #include "base/scoped_cftyperef.h"
     13 #include "base/string_util.h"
     14 
     15 namespace base {
     16 
     17 // static
     18 NativeLibrary LoadNativeLibrary(const FilePath& library_path) {
     19   if (library_path.Extension() == "dylib" ||
     20       !file_util::DirectoryExists(library_path)) {
     21     void* dylib = dlopen(library_path.value().c_str(), RTLD_LAZY);
     22     if (!dylib)
     23       return NULL;
     24     NativeLibrary native_lib = new NativeLibraryStruct();
     25     native_lib->type = DYNAMIC_LIB;
     26     native_lib->dylib = dylib;
     27     return native_lib;
     28   }
     29   scoped_cftyperef<CFURLRef> url(CFURLCreateFromFileSystemRepresentation(
     30       kCFAllocatorDefault,
     31       (const UInt8*)library_path.value().c_str(),
     32       library_path.value().length(),
     33       true));
     34   if (!url)
     35     return NULL;
     36   CFBundleRef bundle = CFBundleCreate(kCFAllocatorDefault, url.get());
     37   if (!bundle)
     38     return NULL;
     39 
     40   NativeLibrary native_lib = new NativeLibraryStruct();
     41   native_lib->type = BUNDLE;
     42   native_lib->bundle = bundle;
     43   native_lib->bundle_resource_ref = CFBundleOpenBundleResourceMap(bundle);
     44   return native_lib;
     45 }
     46 
     47 // static
     48 void UnloadNativeLibrary(NativeLibrary library) {
     49   if (library->type == BUNDLE) {
     50     CFBundleCloseBundleResourceMap(library->bundle,
     51                                    library->bundle_resource_ref);
     52     CFRelease(library->bundle);
     53   } else {
     54     dlclose(library->dylib);
     55   }
     56   delete library;
     57 }
     58 
     59 // static
     60 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
     61                                           const char* name) {
     62   if (library->type == BUNDLE) {
     63     scoped_cftyperef<CFStringRef> symbol_name(
     64         CFStringCreateWithCString(kCFAllocatorDefault, name,
     65                                   kCFStringEncodingUTF8));
     66     return CFBundleGetFunctionPointerForName(library->bundle, symbol_name);
     67   }
     68   return dlsym(library->dylib, name);
     69 }
     70 
     71 // static
     72 string16 GetNativeLibraryName(const string16& name) {
     73   return name + ASCIIToUTF16(".dylib");
     74 }
     75 
     76 }  // namespace base
     77