cd794127ff
No real changes, just make the header self-containing instead of relying on the file including it to include <fcntl.h> itself. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74344 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/unix/pipe.h
|
|
// Purpose: wxPipe class
|
|
// Author: Vadim Zeitlin
|
|
// Modified by:
|
|
// Created: 24.06.2003 (extracted from src/unix/utilsunx.cpp)
|
|
// RCS-ID: $Id$
|
|
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
|
|
// Licence: wxWindows licence
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_UNIX_PIPE_H_
|
|
#define _WX_UNIX_PIPE_H_
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "wx/log.h"
|
|
#include "wx/intl.h"
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxPipe: this class encapsulates pipe() system call
|
|
// ----------------------------------------------------------------------------
|
|
|
|
class wxPipe
|
|
{
|
|
public:
|
|
// the symbolic names for the pipe ends
|
|
enum Direction
|
|
{
|
|
Read,
|
|
Write
|
|
};
|
|
|
|
enum
|
|
{
|
|
INVALID_FD = -1
|
|
};
|
|
|
|
// default ctor doesn't do anything
|
|
wxPipe() { m_fds[Read] = m_fds[Write] = INVALID_FD; }
|
|
|
|
// create the pipe, return TRUE if ok, FALSE on error
|
|
bool Create()
|
|
{
|
|
if ( pipe(m_fds) == -1 )
|
|
{
|
|
wxLogSysError(_("Pipe creation failed"));
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// switch the given end of the pipe to non-blocking IO
|
|
bool MakeNonBlocking(Direction which)
|
|
{
|
|
const int flags = fcntl(m_fds[which], F_GETFL, 0);
|
|
if ( flags == -1 )
|
|
return false;
|
|
|
|
return fcntl(m_fds[which], F_SETFL, flags | O_NONBLOCK) == 0;
|
|
}
|
|
|
|
// return TRUE if we were created successfully
|
|
bool IsOk() const { return m_fds[Read] != INVALID_FD; }
|
|
|
|
// return the descriptor for one of the pipe ends
|
|
int operator[](Direction which) const { return m_fds[which]; }
|
|
|
|
// detach a descriptor, meaning that the pipe dtor won't close it, and
|
|
// return it
|
|
int Detach(Direction which)
|
|
{
|
|
int fd = m_fds[which];
|
|
m_fds[which] = INVALID_FD;
|
|
|
|
return fd;
|
|
}
|
|
|
|
// close the pipe descriptors
|
|
void Close()
|
|
{
|
|
for ( size_t n = 0; n < WXSIZEOF(m_fds); n++ )
|
|
{
|
|
if ( m_fds[n] != INVALID_FD )
|
|
{
|
|
close(m_fds[n]);
|
|
m_fds[n] = INVALID_FD;
|
|
}
|
|
}
|
|
}
|
|
|
|
// dtor closes the pipe descriptors
|
|
~wxPipe() { Close(); }
|
|
|
|
private:
|
|
int m_fds[2];
|
|
};
|
|
|
|
#endif // _WX_UNIX_PIPE_H_
|
|
|