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Current Path: /usr/src/contrib/llvm-project/lldb/source/Host/posix

usr / src / contrib / llvm-project / lldb / source / Host / posix /

📁 ..
📄 ConnectionFileDescriptorPosix.cpp(27.9 KB)
📄 DomainSocket.cpp(4.71 KB)
📄 FileSystemPosix.cpp(2.15 KB)
📄 HostInfoPosix.cpp(4.48 KB)
📄 HostProcessPosix.cpp(2.84 KB)
📄 HostThreadPosix.cpp(1.48 KB)
📄 LockFilePosix.cpp(1.66 KB)
📄 PipePosix.cpp(8.52 KB)
📄 ProcessLauncherPosixFork.cpp(6.85 KB)

Editing: LockFilePosix.cpp

//===-- LockFilePosix.cpp -------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "lldb/Host/posix/LockFilePosix.h"

#include "llvm/Support/Errno.h"

#include <fcntl.h>
#include <unistd.h>

using namespace lldb;
using namespace lldb_private;

namespace {

Status fileLock(int fd, int cmd, int lock_type, const uint64_t start,
                const uint64_t len) {
  struct flock fl;

fl.l_type = lock_type;
  fl.l_whence = SEEK_SET;
  fl.l_start = start;
  fl.l_len = len;
  fl.l_pid = ::getpid();

Status error;
  if (llvm::sys::RetryAfterSignal(-1, ::fcntl, fd, cmd, &fl) == -1)
    error.SetErrorToErrno();

return error;
}

} // namespace

LockFilePosix::LockFilePosix(int fd) : LockFileBase(fd) {}

LockFilePosix::~LockFilePosix() { Unlock(); }

Status LockFilePosix::DoWriteLock(const uint64_t start, const uint64_t len) {
  return fileLock(m_fd, F_SETLKW, F_WRLCK, start, len);
}

Status LockFilePosix::DoTryWriteLock(const uint64_t start, const uint64_t len) {
  return fileLock(m_fd, F_SETLK, F_WRLCK, start, len);
}

Status LockFilePosix::DoReadLock(const uint64_t start, const uint64_t len) {
  return fileLock(m_fd, F_SETLKW, F_RDLCK, start, len);
}

Status LockFilePosix::DoTryReadLock(const uint64_t start, const uint64_t len) {
  return fileLock(m_fd, F_SETLK, F_RDLCK, start, len);
}

Status LockFilePosix::DoUnlock() {
  return fileLock(m_fd, F_SETLK, F_UNLCK, m_start, m_len);
}

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Editing: LockFilePosix.cpp

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