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* miscfuncs.cc (CreatePipeOverlapped): New function.

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(ReadPipeOverlapped): Ditto.
	(WritePipeOverlapped): Ditto.
	* miscfuncs.h: Declare new functions.
	* pinfo.cc (commune_process): Call WritePipeOverlapped instead of
	WriteFile.  Set timeout to 1 sec.
	(_pinfo::commune_request): Call ReadPipeOverlapped instead of ReadFile.
	Set timeout to 0.5 secs.
	* sigproc.cc (sig_send): Create pipe using CreatePipeOverlapped.
This commit is contained in:
Corinna Vinschen
2011-08-13 10:28:15 +00:00
parent 41178da533
commit f8b8b1be3c
5 changed files with 103 additions and 29 deletions
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51
winsup/cygwin/miscfuncs.cc
View File

@ -332,6 +332,57 @@ nice_to_winprio (int &nice)
return prio;
}
/* Minimal overlapped pipe I/O implementation for signal and commune stuff. */
BOOL WINAPI
CreatePipeOverlapped (PHANDLE hr, PHANDLE hw, LPSECURITY_ATTRIBUTES sa)
{
int ret = fhandler_pipe::create_selectable (sa, *hr, *hw, 0);
if (ret)
SetLastError (ret);
return ret == 0;
}
BOOL WINAPI
ReadPipeOverlapped (HANDLE h, PVOID buf, DWORD len, LPDWORD ret_len,
DWORD timeout)
{
OVERLAPPED ov;
BOOL ret;
memset (&ov, 0, sizeof ov);
ov.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
ret = ReadFile (h, buf, len, NULL, &ov);
if (ret || GetLastError () == ERROR_IO_PENDING)
{
if (!ret && WaitForSingleObject (ov.hEvent, timeout) != WAIT_OBJECT_0)
CancelIo (h);
ret = GetOverlappedResult (h, &ov, ret_len, FALSE);
}
CloseHandle (ov.hEvent);
return ret;
}
BOOL WINAPI
WritePipeOverlapped (HANDLE h, PCVOID buf, DWORD len, LPDWORD ret_len,
DWORD timeout)
{
OVERLAPPED ov;
BOOL ret;
memset (&ov, 0, sizeof ov);
ov.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
ret = WriteFile (h, buf, len, NULL, &ov);
if (ret || GetLastError () == ERROR_IO_PENDING)
{
if (!ret && WaitForSingleObject (ov.hEvent, timeout) != WAIT_OBJECT_0)
CancelIo (h);
ret = GetOverlappedResult (h, &ov, ret_len, FALSE);
}
CloseHandle (ov.hEvent);
return ret;
}
/* backslashify: Convert all forward slashes in src path to back slashes
in dst path. Add a trailing slash to dst when trailing_slash_p arg
is set to 1. */