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Annotation of embedaddon/mtr/packet/command_cygwin.h, revision 1.1

1.1     ! misho       1: /*
        !             2:     mtr  --  a network diagnostic tool
        !             3:     Copyright (C) 2016  Matt Kimball
        !             4: 
        !             5:     This program is free software; you can redistribute it and/or modify
        !             6:     it under the terms of the GNU General Public License version 2 as
        !             7:     published by the Free Software Foundation.
        !             8: 
        !             9:     This program is distributed in the hope that it will be useful,
        !            10:     but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            12:     GNU General Public License for more details.
        !            13: 
        !            14:     You should have received a copy of the GNU General Public License
        !            15:     along with this program; if not, write to the Free Software
        !            16:     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
        !            17: */
        !            18: 
        !            19: #ifndef COMMAND_CYGWIN_H
        !            20: #define COMMAND_CYGWIN_H
        !            21: 
        !            22: /*
        !            23:     Though Cygwin supports the usual Unix non-blocking reads on
        !            24:     the command stream, we've got to use Overlapped I/O instead because
        !            25:     ICMP.DLL's support for sending probes requires Overlapped I/O
        !            26:     and alertable waits for notification of replies.  Since we need
        !            27:     alertable waits, we can't use Cygwin's select to determine when
        !            28:     command stream data is available, but Overlapped I/O completion
        !            29:     will work.
        !            30: */
        !            31: 
        !            32: /*  Overlapped I/O manament for Windows command buffer reads  */
        !            33: struct command_buffer_platform_t {
        !            34:     /*  true if an overlapped I/O read is active  */
        !            35:     bool read_active;
        !            36: 
        !            37:     /*  true if the command pipe is still open  */
        !            38:     bool pipe_open;
        !            39: 
        !            40:     /*  Windows OVERLAPPED I/O data  */
        !            41:     OVERLAPPED overlapped;
        !            42: 
        !            43:     /*  The buffer which active OVERLAPPED reads read into  */
        !            44:     char overlapped_buffer[COMMAND_BUFFER_SIZE];
        !            45: };
        !            46: 
        !            47: struct command_buffer_t;
        !            48: 
        !            49: void start_read_command(
        !            50:     struct command_buffer_t *buffer);
        !            51: 
        !            52: #endif