base/native_library_mac.mm

   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