src/monitor/LogOutput.cpp

   1 /** Aesalon, a tool to visualize program behaviour in real time.
   2         Copyright (C) 2009-2011, Aesalon development team.
   3
   4         Aesalon is distributed under the terms of the GNU GPLv3. See
   5         the included file LICENSE for more information.
   6
   7         @file src/monitor/LogOutput.cpp
   8 */
   9
  10 #include <fcntl.h>
  11 #include <errno.h>
  12 #include <cstring>
  13
  14 #include "monitor/LogOutput.h"
  15 #include "util/MessageSystem.h"
  16
  17 namespace Monitor {
  18
  19 LogOutput::LogOutput(std::string spec) {
  20         m_fd = open(spec.c_str(), O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
  21         if(m_fd == -1) {
  22                 Message(Fatal, "Could not open log file \"" << spec << "\": " << std::strerror(errno));
  23         }
  24         sem_init(&m_logSemaphore, 0, 1);
  25 }
  26
  27 LogOutput::~LogOutput() {
  28         close(m_fd);
  29 }
  30
  31 void LogOutput::output(Comm::Packet *packet) {
  32         sem_wait(&m_logSemaphore);
  33
  34         write(m_fd, &packet->header(), sizeof(packet->header()));
  35         write(m_fd, packet->data(), packet->header().dataSize);
  36
  37         sem_post(&m_logSemaphore);
  38 }
  39
  40 } // namespace Monitor