-/* $Id$
-
-This file is part of libmspio
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#ifndef WIN32
#include <fcntl.h>
#include <errno.h>
Pipe::Pipe()
{
#ifdef WIN32
- string name=format("\\\\.\\pipe\\%u.%p", GetCurrentProcessId(), this);
- handle[0]=CreateNamedPipe(name.c_str(), PIPE_ACCESS_INBOUND|FILE_FLAG_OVERLAPPED, PIPE_TYPE_BYTE, 1, 1024, 1024, 0, 0);
+ string name = format("\\\\.\\pipe\\%u.%p", GetCurrentProcessId(), this);
+ handle[0] = CreateNamedPipe(name.c_str(), PIPE_ACCESS_INBOUND|FILE_FLAG_OVERLAPPED, PIPE_TYPE_BYTE, 1, 1024, 1024, 0, 0);
if(handle[0]==INVALID_HANDLE_VALUE)
throw SystemError("Unable to create pipe", GetLastError());
- handle[1]=CreateFile(name.c_str(), GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
+ handle[1] = CreateFile(name.c_str(), GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
if(handle[1]==INVALID_HANDLE_VALUE)
{
- unsigned err=GetLastError();
+ unsigned err = GetLastError();
CloseHandle(handle[0]);
throw SystemError("Unable to create pipe", err);
}
- overlapped=0;
- event=CreateEvent(0, true, false, 0);
- buf_size=1024;
- buffer=new char[buf_size];
- buf_avail=0;
- buf_next=buffer;
+ overlapped = 0;
+ event = CreateEvent(0, true, false, 0);
+ buf_size = 1024;
+ buffer = new char[buf_size];
+ buf_avail = 0;
+ buf_next = buffer;
#else
if(pipe(handle)==-1)
throw SystemError("Unable to create pipe", errno);
set_events(P_INPUT);
}
-void Pipe::set_block(bool b)
+Pipe::~Pipe()
{
- mode=(mode&~M_NONBLOCK);
- if(b)
- mode=(mode|M_NONBLOCK);
-
-#ifndef WIN32
- int flags=fcntl(handle[0], F_GETFD);
- fcntl(handle[0], F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
- flags=fcntl(handle[1], F_GETFD);
- fcntl(handle[1], F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
-#endif
+ close();
}
void Pipe::close()
#endif
}
-Handle Pipe::get_event_handle()
+void Pipe::set_block(bool b)
{
-#ifdef WIN32
- if(!overlapped && !buf_avail)
- {
- overlapped=new OVERLAPPED;
- memset(overlapped, 0, sizeof(OVERLAPPED));
- overlapped->hEvent=event;
-
- DWORD ret;
- buf_next=buffer;
- if(!ReadFile(handle[0], buffer, buf_size, &ret, overlapped))
- {
- unsigned err=GetLastError();
- if(err!=ERROR_IO_PENDING)
- throw SystemError("Failed to start an overlapped read", err);
- }
- else
- {
- buf_avail=ret;
- delete overlapped;
- overlapped=0;
- SetEvent(event);
- }
- }
+ mode = (mode&~M_NONBLOCK);
+ if(b)
+ mode = (mode|M_NONBLOCK);
- return event;
-#else
- return handle[0];
+#ifndef WIN32
+ int flags = fcntl(handle[0], F_GETFD);
+ fcntl(handle[0], F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
+ flags = fcntl(handle[1], F_GETFD);
+ fcntl(handle[1], F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
#endif
}
-Pipe::~Pipe()
-{
- close();
-}
-
unsigned Pipe::do_write(const char *buf, unsigned size)
{
if(size==0)
if(!WriteFile(handle[1], buf, size, &ret, 0))
throw SystemError("Writing to pipe failed", GetLastError());
#else
- int ret=::write(handle[1], buf, size);
+ int ret = ::write(handle[1], buf, size);
if(ret==-1)
{
if(errno==EAGAIN)
throw SystemError("Reading from pipe failed", GetLastError());
else
{
- buf_avail+=ret;
+ buf_avail += ret;
delete overlapped;
- overlapped=0;
+ overlapped = 0;
}
}
- unsigned ret=min(buf_avail, size);
+ unsigned ret = min(buf_avail, size);
memcpy(buf, buf_next, ret);
- buf_next+=ret;
- buf_avail-=ret;
+ buf_next += ret;
+ buf_avail -= ret;
// Initiate another overlapped read in case someone is polling us
get_event_handle();
#else
- int ret=::read(handle[0], buf, size);
+ int ret = ::read(handle[0], buf, size);
if(ret==-1)
{
if(errno==EAGAIN)
if(ret==0)
{
- eof_flag=true;
+ eof_flag = true;
signal_end_of_file.emit();
}
return ret;
}
+Handle Pipe::get_event_handle()
+{
+#ifdef WIN32
+ if(!overlapped && !buf_avail)
+ {
+ overlapped = new OVERLAPPED;
+ memset(overlapped, 0, sizeof(OVERLAPPED));
+ overlapped->hEvent = event;
+
+ DWORD ret;
+ buf_next = buffer;
+ if(!ReadFile(handle[0], buffer, buf_size, &ret, overlapped))
+ {
+ unsigned err = GetLastError();
+ if(err!=ERROR_IO_PENDING)
+ throw SystemError("Failed to start an overlapped read", err);
+ }
+ else
+ {
+ buf_avail = ret;
+ delete overlapped;
+ overlapped = 0;
+ SetEvent(event);
+ }
+ }
+
+ return event;
+#else
+ return handle[0];
+#endif
+}
+
} // namespace IO
} // namespace Msp