62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* fdb_c_shim.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if (defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__))
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#define DLLEXPORT __attribute__((visibility("default")))
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#include "foundationdb/fdb_c_shim.h"
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#include <dlfcn.h>
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#include <string>
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namespace {
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const char* FDB_LOCAL_CLIENT_LIBRARY_PATH_ENVVAR = "FDB_LOCAL_CLIENT_LIBRARY_PATH";
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std::string g_fdbLocalClientLibraryPath;
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} // namespace
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extern "C" DLLEXPORT void fdb_shim_set_local_client_library_path(const char* filePath) {
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g_fdbLocalClientLibraryPath = filePath;
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}
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/* The callback of the fdb_c_shim layer that determines the path
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of the fdb_c library to be dynamically loaded
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*/
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extern "C" void* fdb_shim_dlopen_callback(const char* libName) {
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std::string libPath;
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if (!g_fdbLocalClientLibraryPath.empty()) {
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libPath = g_fdbLocalClientLibraryPath;
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} else {
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char* val = getenv(FDB_LOCAL_CLIENT_LIBRARY_PATH_ENVVAR);
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if (val) {
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libPath = val;
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} else {
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libPath = libName;
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}
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}
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return dlopen(libPath.c_str(), RTLD_LAZY | RTLD_GLOBAL);
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}
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#else
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#error Port me!
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#endif
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