93c1b3caf0
.. and reduce the scope of others. They don't follow llvm coding standards (which say they should be used only when the same effect cannot be achieved with the static keyword), and they set a bad example.
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
//===-- LockFilePosix.cpp -------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/posix/LockFilePosix.h"
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#include "llvm/Support/Errno.h"
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#include <fcntl.h>
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#include <unistd.h>
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using namespace lldb;
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using namespace lldb_private;
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static Status fileLock(int fd, int cmd, int lock_type, const uint64_t start,
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const uint64_t len) {
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struct flock fl;
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fl.l_type = lock_type;
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fl.l_whence = SEEK_SET;
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fl.l_start = start;
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fl.l_len = len;
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fl.l_pid = ::getpid();
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Status error;
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if (llvm::sys::RetryAfterSignal(-1, ::fcntl, fd, cmd, &fl) == -1)
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error.SetErrorToErrno();
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return error;
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}
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LockFilePosix::LockFilePosix(int fd) : LockFileBase(fd) {}
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LockFilePosix::~LockFilePosix() { Unlock(); }
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Status LockFilePosix::DoWriteLock(const uint64_t start, const uint64_t len) {
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return fileLock(m_fd, F_SETLKW, F_WRLCK, start, len);
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}
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Status LockFilePosix::DoTryWriteLock(const uint64_t start, const uint64_t len) {
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return fileLock(m_fd, F_SETLK, F_WRLCK, start, len);
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}
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Status LockFilePosix::DoReadLock(const uint64_t start, const uint64_t len) {
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return fileLock(m_fd, F_SETLKW, F_RDLCK, start, len);
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}
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Status LockFilePosix::DoTryReadLock(const uint64_t start, const uint64_t len) {
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return fileLock(m_fd, F_SETLK, F_RDLCK, start, len);
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}
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Status LockFilePosix::DoUnlock() {
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return fileLock(m_fd, F_SETLK, F_UNLCK, m_start, m_len);
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}
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