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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#if defined(__sun)
#include "mongo/platform/posix_fadvise.h"
#include <dlfcn.h>
#include "mongo/base/init.h"
#include "mongo/base/status.h"
namespace mongo {
namespace pal {
int posix_fadvise_emulation(int fd, off_t offset, off_t len, int advice) {
return 0;
}
typedef int (*PosixFadviseFunc)(int fd, off_t offset, off_t len, int advice);
static PosixFadviseFunc posix_fadvise_switcher = mongo::pal::posix_fadvise_emulation;
int posix_fadvise(int fd, off_t offset, off_t len, int advice) {
return posix_fadvise_switcher(fd, offset, len, advice);
}
} // namespace pal
// 'posix_fadvise()' on Solaris will call the emulation if the symbol is not found
//
MONGO_INITIALIZER_GENERAL(SolarisPosixFadvise, MONGO_NO_PREREQUISITES, ("default"))
(InitializerContext* context) {
void* functionAddress = dlsym(RTLD_DEFAULT, "posix_fadvise");
if (functionAddress != NULL) {
mongo::pal::posix_fadvise_switcher =
reinterpret_cast<mongo::pal::PosixFadviseFunc>(functionAddress);
}
return Status::OK();
}
} // namespace mongo
#endif // #if defined(__sun)
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