whesse@google.com
0e40002890
BUG= TEST=standalone/TestExtensionTest Review URL: https://chromiumcodereview.appspot.com//9430051 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@4529 260f80e4-7a28-3924-810f-c04153c831b5
46 lines
1.8 KiB
C++
46 lines
1.8 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include <stdio.h>
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#include <dlfcn.h>
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#include "include/dart_api.h"
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#include "platform/assert.h"
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#include "platform/globals.h"
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#include "bin/extensions.h"
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#include "bin/dartutils.h"
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Dart_Handle Extensions::LoadExtension(const char* extension_url,
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Dart_Handle parent_library) {
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// TODO(whesse): Consider making loading extensions lazy, so the
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// dynamic library is loaded only when first native function is called.
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ASSERT(DartUtils::IsDartExtensionSchemeURL(extension_url));
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const char* library_name =
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extension_url + strlen(DartUtils::kDartExtensionScheme);
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if (strchr(library_name, '/') != NULL) {
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return Dart_Error("path components not allowed in extension library name");
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}
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const int buffer_length = strlen(library_name) + strlen("./lib.so") + 1;
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char* library_path = new char[buffer_length];
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snprintf(library_path, buffer_length, "./lib%s.so", library_name);
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void* lib_handle = dlopen(library_path, RTLD_LAZY);
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if (!lib_handle) {
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delete[] library_path;
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return Dart_Error("cannot find extension library");
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}
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// Reuse library_path buffer for intialization function name.
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char* library_init_function = library_path;
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snprintf(library_init_function, buffer_length, "%s_Init", library_name);
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typedef Dart_Handle (*InitFunctionType)(Dart_Handle import_map);
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InitFunctionType fn = reinterpret_cast<InitFunctionType>(
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dlsym(lib_handle, library_init_function));
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delete[] library_path;
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char *error = dlerror();
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if (error != NULL) {
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return Dart_Error(error);
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}
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return (*fn)(parent_library);
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}
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