mirror of
https://github.com/gcc-mirror/gcc.git
synced 2024-11-21 13:40:47 +00:00
146 lines
3.3 KiB
C++
146 lines
3.3 KiB
C++
/* Connect implementation
|
|
Copyright (C) 2014-2024 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License as published by the Free
|
|
Software Foundation; either version 3, or (at your option) any later
|
|
version.
|
|
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GCC; see the file COPYING3. If not see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <cc1plugin-config.h>
|
|
#include <string>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include "marshall.hh"
|
|
#include "connection.hh"
|
|
#include "rpc.hh"
|
|
|
|
cc1_plugin::status
|
|
cc1_plugin::connection::send (char c)
|
|
{
|
|
if (write (m_fd, &c, 1) != 1)
|
|
return FAIL;
|
|
return OK;
|
|
}
|
|
|
|
cc1_plugin::status
|
|
cc1_plugin::connection::send (const void *buf, int len)
|
|
{
|
|
if (write (m_fd, buf, len) != len)
|
|
return FAIL;
|
|
return OK;
|
|
}
|
|
|
|
cc1_plugin::status
|
|
cc1_plugin::connection::require (char c)
|
|
{
|
|
char result;
|
|
|
|
if (read (m_fd, &result, 1) != 1
|
|
|| result != c)
|
|
return FAIL;
|
|
|
|
return OK;
|
|
}
|
|
|
|
cc1_plugin::status
|
|
cc1_plugin::connection::get (void *buf, int len)
|
|
{
|
|
if (read (m_fd, buf, len) != len)
|
|
return FAIL;
|
|
return OK;
|
|
}
|
|
|
|
cc1_plugin::status
|
|
cc1_plugin::connection::do_wait (bool want_result)
|
|
{
|
|
while (true)
|
|
{
|
|
char result;
|
|
fd_set read_set;
|
|
|
|
FD_ZERO (&read_set);
|
|
FD_SET (m_fd, &read_set);
|
|
if (m_aux_fd != -1)
|
|
FD_SET (m_aux_fd, &read_set);
|
|
|
|
int nfds = select (FD_SETSIZE, &read_set, NULL, NULL, NULL);
|
|
if (nfds == -1)
|
|
{
|
|
if (errno == EINTR)
|
|
continue;
|
|
return FAIL;
|
|
}
|
|
|
|
// We have to check the stderr fd first, to avoid a possible
|
|
// blocking scenario when do_wait is called reentrantly. In
|
|
// such a call, if we handle the primary fd first, then we may
|
|
// re-enter this function, read from gcc's stderr, causing the
|
|
// outer invocation of this function to block when trying to
|
|
// read.
|
|
if (m_aux_fd != -1 && FD_ISSET (m_aux_fd, &read_set))
|
|
{
|
|
char buf[1024];
|
|
int n = read (m_aux_fd, buf, sizeof (buf) - 1);
|
|
if (n < 0)
|
|
return FAIL;
|
|
if (n > 0)
|
|
{
|
|
buf[n] = '\0';
|
|
print (buf);
|
|
}
|
|
}
|
|
|
|
if (FD_ISSET (m_fd, &read_set))
|
|
{
|
|
int n = read (m_fd, &result, 1);
|
|
if (n == 0)
|
|
return want_result ? FAIL : OK;
|
|
if (n != 1)
|
|
return FAIL;
|
|
|
|
switch (result)
|
|
{
|
|
case 'R':
|
|
// The reply is ready; the caller will unmarshall it.
|
|
return want_result ? OK : FAIL;
|
|
|
|
case 'Q':
|
|
// While waiting for a reply, the other side made a method
|
|
// call.
|
|
{
|
|
// Use an argument_wrapper here to simplify management
|
|
// of the string's lifetime.
|
|
argument_wrapper<char *> method_name;
|
|
|
|
if (!method_name.unmarshall (this))
|
|
return FAIL;
|
|
|
|
callback_ftype *callback
|
|
= m_callbacks.find_callback (method_name.get ());
|
|
// The call to CALLBACK is where we may end up in a
|
|
// reentrant call.
|
|
if (callback == NULL || !callback (this))
|
|
return FAIL;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return FAIL;
|
|
}
|
|
}
|
|
}
|
|
}
|