mirror of
https://github.com/Atmosphere-NX/Atmosphere
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50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
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/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "os_giant_lock.os.linux.hpp"
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#include <sys/syscall.h>
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#include <unistd.h>
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#include <fcntl.h>
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namespace ams::os::impl {
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#define AMS_OS_IMPL_GIANT_LOCK_FILE_PATH "/tmp/.ams_os_giant_lock"
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void GiantLockLinuxImpl::Lock() {
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m_fd = ::open(AMS_OS_IMPL_GIANT_LOCK_FILE_PATH, O_RDWR | O_CREAT | O_CLOEXEC, S_IRUSR | S_IWUSR);
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AMS_ABORT_UNLESS(m_fd >= 0);
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while (::lockf(m_fd, F_LOCK, 0) < 0) {
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AMS_ABORT_UNLESS(errno == EINTR);
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}
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}
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void GiantLockLinuxImpl::Unlock() {
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AMS_ASSERT(m_fd >= 0);
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while (::lockf(m_fd, F_ULOCK, 0) < 0) {
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AMS_ABORT_UNLESS(errno == EINTR);
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}
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while (::close(m_fd) < 0) {
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AMS_ABORT_UNLESS(errno == EINTR);
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}
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m_fd = os::InvalidNativeHandle;
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}
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}
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