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| 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 #ifndef BASE_NATIVE_LIBRARY_H_ | |
| 6 #define BASE_NATIVE_LIBRARY_H_ | |
| 7 | |
| 8 // This file defines a cross-platform "NativeLibrary" type which represents | |
| 9 // a loadable module. | |
| 10 | |
| 11 #include <string> | |
| 12 | |
| 13 #include "base/base_export.h" | |
| 14 #include "base/compiler_specific.h" | |
| 15 #include "base/strings/string16.h" | |
| 16 #include "build/build_config.h" | |
| 17 | |
| 18 #if defined(OS_WIN) | |
| 19 #include <windows.h> | |
| 20 #elif defined(OS_MACOSX) | |
| 21 #import <CoreFoundation/CoreFoundation.h> | |
| 22 #endif // OS_* | |
| 23 | |
| 24 namespace base { | |
| 25 | |
| 26 class FilePath; | |
| 27 | |
| 28 #if defined(OS_WIN) | |
| 29 typedef HMODULE NativeLibrary; | |
| 30 #elif defined(OS_MACOSX) | |
| 31 enum NativeLibraryType { | |
| 32 BUNDLE, | |
| 33 DYNAMIC_LIB | |
| 34 }; | |
| 35 enum NativeLibraryObjCStatus { | |
| 36 OBJC_UNKNOWN, | |
| 37 OBJC_PRESENT, | |
| 38 OBJC_NOT_PRESENT, | |
| 39 }; | |
| 40 struct NativeLibraryStruct { | |
| 41 NativeLibraryType type; | |
| 42 CFBundleRefNum bundle_resource_ref; | |
| 43 NativeLibraryObjCStatus objc_status; | |
| 44 union { | |
| 45 CFBundleRef bundle; | |
| 46 void* dylib; | |
| 47 }; | |
| 48 }; | |
| 49 typedef NativeLibraryStruct* NativeLibrary; | |
| 50 #elif defined(OS_POSIX) | |
| 51 typedef void* NativeLibrary; | |
| 52 #endif // OS_* | |
| 53 | |
| 54 struct BASE_EXPORT NativeLibraryLoadError { | |
| 55 #if defined(OS_WIN) | |
| 56 NativeLibraryLoadError() : code(0) {} | |
| 57 #endif // OS_WIN | |
| 58 | |
| 59 // Returns a string representation of the load error. | |
| 60 std::string ToString() const; | |
| 61 | |
| 62 #if defined(OS_WIN) | |
| 63 DWORD code; | |
| 64 #else | |
| 65 std::string message; | |
| 66 #endif // OS_WIN | |
| 67 }; | |
| 68 | |
| 69 // Loads a native library from disk. Release it with UnloadNativeLibrary when | |
| 70 // you're done. Returns NULL on failure. | |
| 71 // If |error| is not NULL, it may be filled in on load error. | |
| 72 BASE_EXPORT NativeLibrary LoadNativeLibrary(const FilePath& library_path, | |
| 73 NativeLibraryLoadError* error); | |
| 74 | |
| 75 #if defined(OS_WIN) | |
| 76 // Loads a native library from disk. Release it with UnloadNativeLibrary when | |
| 77 // you're done. | |
| 78 // This function retrieves the LoadLibrary function exported from kernel32.dll | |
| 79 // and calls it instead of directly calling the LoadLibrary function via the | |
| 80 // import table. | |
| 81 BASE_EXPORT NativeLibrary LoadNativeLibraryDynamically( | |
| 82 const FilePath& library_path); | |
| 83 #endif // OS_WIN | |
| 84 | |
| 85 // Unloads a native library. | |
| 86 BASE_EXPORT void UnloadNativeLibrary(NativeLibrary library); | |
| 87 | |
| 88 // Gets a function pointer from a native library. | |
| 89 BASE_EXPORT void* GetFunctionPointerFromNativeLibrary(NativeLibrary library, | |
| 90 const char* name); | |
| 91 | |
| 92 // Returns the full platform specific name for a native library. | |
| 93 // For example: | |
| 94 // "mylib" returns "mylib.dll" on Windows, "libmylib.so" on Linux, | |
| 95 // "mylib.dylib" on Mac. | |
| 96 BASE_EXPORT string16 GetNativeLibraryName(const string16& name); | |
| 97 | |
| 98 } // namespace base | |
| 99 | |
| 100 #endif // BASE_NATIVE_LIBRARY_H_ | |
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