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// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "emugl/common/shared_library.h"
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#ifndef _WIN32
#include <dlfcn.h>
#include <stdlib.h>
#endif
namespace emugl {
#ifdef _WIN32
// static
SharedLibrary* SharedLibrary::open(const char* libraryName) {
HMODULE lib = LoadLibrary(libraryName);
return lib ? new SharedLibrary(lib) : NULL;
}
SharedLibrary::SharedLibrary(HandleType lib) : mLib(lib) {}
SharedLibrary::~SharedLibrary() {
if (mLib) {
FreeLibrary(mLib);
}
}
SharedLibrary::FunctionPtr SharedLibrary::findSymbol(
const char* symbolName) {
if (!mLib || !symbolName) {
return NULL;
}
return reinterpret_cast<FunctionPtr>(
GetProcAddress(mLib, symbolName));
}
#else // !_WIN32
// static
SharedLibrary* SharedLibrary::open(const char* libraryName) {
const char* libPath = libraryName;
char* path = NULL;
const char* libBaseName = strrchr(libraryName, '/');
if (!libBaseName) {
libBaseName = libraryName;
}
if (!strchr(libBaseName, '.')) {
// There is no extension in this library name, so append one.
#ifdef __APPLE__
static const char kDllExtension[] = ".dylib";
#else
static const char kDllExtension[] = ".so";
#endif
size_t pathLen = strlen(libraryName) + sizeof(kDllExtension);
path = static_cast<char*>(malloc(pathLen));
snprintf(path, pathLen, "%s%s", libraryName, kDllExtension);
libPath = path;
}
#ifdef __APPLE__
// On OSX, some libraries don't include an extension (notably OpenGL)
// On OSX we try to open |libraryName| first. If that doesn't exist,
// we try |libraryName|.dylib
void* lib = dlopen(libraryName, RTLD_NOW);
if (lib == NULL) {
lib = dlopen(libPath, RTLD_NOW);
}
#else
void* lib = dlopen(libPath, RTLD_NOW);
#endif
if (path) {
free(path);
}
return lib ? new SharedLibrary(lib) : NULL;
}
SharedLibrary::SharedLibrary(HandleType lib) : mLib(lib) {}
SharedLibrary::~SharedLibrary() {
if (mLib) {
dlclose(mLib);
}
}
SharedLibrary::FunctionPtr SharedLibrary::findSymbol(
const char* symbolName) {
if (!mLib || !symbolName) {
return NULL;
}
return reinterpret_cast<FunctionPtr>(dlsym(mLib, symbolName));
}
#endif // !_WIN32
} // namespace emugl
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