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/*
* Copyright (C) 2018 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 "perfetto/base/pipe.h"
#include <sys/types.h>
#include <unistd.h>
#include "perfetto/base/logging.h"
namespace perfetto {
namespace base {
Pipe::Pipe() = default;
Pipe::Pipe(Pipe&&) noexcept = default;
Pipe& Pipe::operator=(Pipe&&) = default;
Pipe Pipe::Create(Flags flags) {
int fds[2];
PERFETTO_CHECK(pipe(fds) == 0);
Pipe p;
p.rd.reset(fds[0]);
p.wr.reset(fds[1]);
PERFETTO_CHECK(fcntl(*p.rd, F_SETFD, FD_CLOEXEC) == 0);
PERFETTO_CHECK(fcntl(*p.wr, F_SETFD, FD_CLOEXEC) == 0);
if (flags == kBothNonBlock || flags == kRdNonBlock) {
int cur_flags = fcntl(*p.rd, F_GETFL, 0);
PERFETTO_CHECK(cur_flags >= 0);
PERFETTO_CHECK(fcntl(*p.rd, F_SETFL, cur_flags | O_NONBLOCK) == 0);
}
if (flags == kBothNonBlock || flags == kWrNonBlock) {
int cur_flags = fcntl(*p.wr, F_GETFL, 0);
PERFETTO_CHECK(cur_flags >= 0);
PERFETTO_CHECK(fcntl(*p.wr, F_SETFL, cur_flags | O_NONBLOCK) == 0);
}
return p;
}
} // namespace base
} // namespace perfetto
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