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filedescriptor.cpp
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#include "simppl/filedescriptor.h"
#include <cassert>
namespace {
int noop(int)
{
// NOOP
return 0;
}
}
// ---------------------------------------------------------------------
namespace simppl
{
namespace dbus
{
FileDescriptor::FileDescriptor()
: fd_(-1)
, destructor_(&close)
{
// NOOP
}
FileDescriptor::FileDescriptor(int fd)
: fd_(fd)
, destructor_(&close)
{
assert(fd >= 0);
}
FileDescriptor::FileDescriptor(std::reference_wrapper<int> fd)
: fd_(fd)
, destructor_(&noop)
{
assert(fd >= 0);
}
FileDescriptor::~FileDescriptor()
{
if (fd_ != -1)
(*destructor_)(fd_);
}
FileDescriptor::FileDescriptor(const FileDescriptor& rhs)
: fd_(-1)
, destructor_(rhs.destructor_)
{
if (rhs.fd_ != -1)
{
if (destructor_ == &noop)
fd_ = rhs.fd_;
else
fd_ = dup(rhs.fd_);
}
}
FileDescriptor& FileDescriptor::operator=(const FileDescriptor& rhs)
{
if (this != &rhs)
{
if (fd_ != -1)
(*destructor_)(fd_);
if (rhs.fd_ != -1)
{
if (rhs.destructor_ == &noop)
fd_ = rhs.fd_;
else
fd_ = dup(rhs.fd_);
}
else
fd_ = -1;
destructor_ = rhs.destructor_;
}
return *this;
}
FileDescriptor::FileDescriptor(FileDescriptor&& rhs)
: fd_(rhs.fd_)
, destructor_(rhs.destructor_)
{
rhs.fd_ = -1;
}
FileDescriptor& FileDescriptor::operator=(int fd)
{
if (fd_ != -1)
(*destructor_)(fd_);
fd_ = fd;
if (fd_ < 0)
fd_ = -1;
return *this;
}
FileDescriptor& FileDescriptor::operator=(FileDescriptor&& rhs)
{
if (fd_ != -1)
(*destructor_)(fd_);
fd_ = rhs.fd_;
rhs.fd_ = -1;
destructor_ = rhs.destructor_;
return *this;
}
int FileDescriptor::native_handle() const
{
return fd_;
}
int FileDescriptor::release()
{
int fd = fd_;
fd_ = -1;
return fd;
}
/*static*/
void FileDescriptorCodec::encode(DBusMessageIter& iter, const FileDescriptor& fd)
{
int _fd = fd.native_handle();
dbus_message_iter_append_basic(&iter, DBUS_TYPE_UNIX_FD, &_fd);
}
/*static*/
void FileDescriptorCodec::decode(DBusMessageIter& iter, FileDescriptor& fd)
{
int _fd;
simppl_dbus_message_iter_get_basic(&iter, &_fd, DBUS_TYPE_UNIX_FD);
fd = _fd;
}
/*static*/
std::ostream& FileDescriptorCodec::make_type_signature(std::ostream& os)
{
return os << DBUS_TYPE_UNIX_FD_AS_STRING;
}
} // namespace dbus
} // namespace simppl