cinelerra-5.0/cinelerra/fileserver.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2009 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "file.inc"
  23
  24 #ifdef USE_FILEFORK
  25
  26 #include "bcresources.h"
  27 #include "bcsignals.h"
  28 #include "filefork.h"
  29 #include "fileserver.h"
  30 #include "mutex.h"
  31
  32
  33 #include <unistd.h>
  34
  35
  36 FileServer::FileServer(Preferences *preferences) : ForkWrapper()
  37 {
  38         this->preferences = preferences;
  39         lock = new Mutex("FileServer::lock");
  40 }
  41
  42 FileServer::~FileServer()
  43 {
  44         stop();
  45         delete lock;
  46 }
  47
  48 void FileServer::init_child()
  49 {
  50         BC_WindowBase::get_resources()->vframe_shm = 1;
  51 //printf("FileServer::init_child %d %d\n", __LINE__, getpid());
  52 }
  53
  54 int FileServer::handle_command()
  55 {
  56         const int debug = 0;
  57         switch(command_token)
  58         {
  59                 case NEW_FILEFORK:
  60                 {
  61                         FileFork *file_fork = new FileFork(this);
  62                         file_fork->start();
  63                         unsigned char buffer[sizeof(FileFork*) + sizeof(int)];
  64                         FileFork **ffbfr = (FileFork **)buffer;
  65                         *ffbfr = file_fork;
  66                         int *ibfr = (int *)&ffbfr[1];
  67                         *ibfr = file_fork->pid;
  68
  69                         if(debug) printf("FileServer::handle_command NEW_FILEFORK %d parent_fd=%d file_fork=%p\n",
  70                                 __LINE__,
  71                                 file_fork->parent_fd,
  72                                 file_fork);
  73                         send_fd(file_fork->parent_fd);
  74                         send_result(0, buffer, sizeof(FileFork*) + sizeof(int));
  75                         break;
  76                 }
  77
  78                 case DELETE_FILEFORK:
  79                 {
  80                         FileFork **ffbfr = (FileFork **)command_data;
  81                         FileFork *file_fork = *ffbfr;
  82                         if(debug) printf("FileServer::handle_command DELETE_FILEFORK %d file_fork=%p\n",
  83                                 __LINE__,
  84                                 file_fork);
  85                         delete file_fork;
  86                         break;
  87                 }
  88         }
  89
  90         return 0;
  91 }
  92
  93 FileFork* FileServer::new_filefork()
  94 {
  95         lock->lock("FileServer::open_file");
  96         FileFork *dummy_fork = new FileFork(this);
  97 // Create real file fork on the server
  98         send_command(FileServer::NEW_FILEFORK, 0, 0);
  99
 100         int parent_fd = get_fd();
 101         read_result();
 102
 103 // Transfer fd to dummy file fork
 104         dummy_fork->start_dummy(parent_fd, *(int*)(result_data + sizeof(FileFork*)));
 105         dummy_fork->real_fork = *(FileFork**)result_data;
 106 // printf("FileServer::new_filefork %d parent_fd=%d real_fork=%p\n",
 107 // __LINE__,
 108 // parent_fd,
 109 // dummy_fork->real_fork);
 110         lock->unlock();
 111         return dummy_fork;
 112 }
 113
 114 void FileServer::delete_filefork(FileFork *file_fork)
 115 {
 116         lock->lock("FileServer::close_file");
 117 // Delete filefork on server
 118         unsigned char buffer[sizeof(FileFork*)];
 119         FileFork **ffbfr = (FileFork **)buffer;
 120         *ffbfr = file_fork;
 121         send_command(FileServer::DELETE_FILEFORK, buffer, sizeof(FileFork*));
 122         lock->unlock();
 123 }
 124
 125 #endif // USE_FILEFORK
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