1 // Copyright (c) 2011 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
9 #include "base/file_path.h"
10 #include "base/logging.h"
11 #include "base/threading/thread_restrictions.h"
12 #include "base/utf_string_conversions.h"
13
14 namespace base {
15
16 // static
LoadNativeLibrary(const FilePath & library_path,std::string * error)17 NativeLibrary LoadNativeLibrary(const FilePath& library_path,
18 std::string* error) {
19 // dlopen() opens the file off disk.
20 base::ThreadRestrictions::AssertIOAllowed();
21
22 // We deliberately do not use RTLD_DEEPBIND. For the history why, please
23 // refer to the bug tracker. Some useful bug reports to read include:
24 // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892,
25 // and http://crbug.com/40794.
26 void* dl = dlopen(library_path.value().c_str(), RTLD_LAZY);
27 if (!dl && error)
28 *error = dlerror();
29
30 return dl;
31 }
32
33 // static
UnloadNativeLibrary(NativeLibrary library)34 void UnloadNativeLibrary(NativeLibrary library) {
35 int ret = dlclose(library);
36 if (ret < 0) {
37 LOG(ERROR) << "dlclose failed: " << dlerror();
38 NOTREACHED();
39 }
40 }
41
42 // static
GetFunctionPointerFromNativeLibrary(NativeLibrary library,const char * name)43 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
44 const char* name) {
45 return dlsym(library, name);
46 }
47
48 // static
GetNativeLibraryName(const string16 & name)49 string16 GetNativeLibraryName(const string16& name) {
50 return ASCIIToUTF16("lib") + name + ASCIIToUTF16(".so");
51 }
52
53 } // namespace base
54