Signal handler with cleaner shutdown.

Window title and stuff.


git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@248 e378c898-3ddf-0310-93e7-cc216c733640

src/signal_handler.cc

@@ -0,0 +1,47 @@
+#include "config.h"
+
+#include <stdexcept>
+#include "signal_handler.h"
+
+SignalHandler::Slot SignalHandler::m_handlers[HIGHEST_SIGNAL];
+
+void
+SignalHandler::set_default(unsigned int signum) {
+  if (signum >= HIGHEST_SIGNAL)
+    throw std::logic_error("SignalHandler::clear(...) received invalid signal value");
+
+  signal(signum, SIG_DFL);
+  m_handlers[signum].disconnect();
+}
+
+void
+SignalHandler::set_ignore(unsigned int signum) {
+  if (signum >= HIGHEST_SIGNAL)
+    throw std::logic_error("SignalHandler::clear(...) received invalid signal value");
+
+  signal(signum, SIG_IGN);
+  m_handlers[signum].disconnect();
+}
+
+void
+SignalHandler::set_handler(unsigned int signum, Slot slot) {
+  if (signum >= HIGHEST_SIGNAL)
+    throw std::logic_error("SignalHandler::handle(...) received invalid signal value");
+
+  if (slot.empty())
+    throw std::logic_error("SignalHandler::handle(...) received an empty slot");
+
+  signal(signum, &SignalHandler::caught);
+  m_handlers[signum] = slot;
+}
+
+void
+SignalHandler::caught(int signum) {
+  if ((unsigned)signum >= HIGHEST_SIGNAL)
+    throw std::logic_error("SignalHandler::caught(...) received invalid signal from the kernel, bork bork bork");
+
+  if (m_handlers[signum].empty())
+    throw std::logic_error("SignalHandler::caught(...) received a signal we don't have a handler for");
+
+  m_handlers[signum]();
+}