initial version of powersensordaemon

[svn42.git] / powersensordaemon / command_queue.c

diff --git a/powersensordaemon/command_queue.c b/powersensordaemon/command_queue.c
new file mode 100644 (file)
index 0000000..09fea0b
--- /dev/null
+++ b/powersensordaemon/command_queue.c
@@ -0,0 +1,118 @@
+/*
+ *  powersensordaemon
+ *
+ *  Copyright (C) 2009 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of powersensordaemon.
+ *
+ *  powersensordaemon is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  powersensordaemon is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with powersensordaemon. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "command_queue.h"
+#include "datatypes.h"
+
+cmd_t* cmd_get_last(cmd_t* first)
+{
+  if(!first) 
+    return NULL;
+
+  while(first->next) {
+    first = first->next;
+  }
+
+  return first;
+}
+
+int cmd_push(cmd_t** first, int fd, cmd_id_t cmd, const char* param)
+{
+  if(!first)
+    return -1;
+
+  cmd_t* new_cmd = malloc(sizeof(cmd_t));
+  if(!new_cmd)
+    return -2;
+
+  new_cmd->fd = fd;
+  new_cmd->cmd = cmd;
+  if(param) {
+    new_cmd->param = strdup(param);
+    if(!new_cmd->param) {
+      free(new_cmd);
+      return -2;
+    }
+  }
+  else
+    new_cmd->param = NULL;
+  new_cmd->sent = 0;
+  new_cmd->tv_start.tv_sec = 0;
+  new_cmd->tv_start.tv_usec = 0;
+  new_cmd->next = NULL;
+
+  if(!(*first)) {
+    *first = new_cmd;
+    return 0;
+  }
+    
+  cmd_get_last(*first)->next = new_cmd;
+
+  return 0;
+}
+
+void cmd_sent(cmd_t* cmd)
+{
+  if(!cmd)
+    return;
+
+  cmd->sent = 1;
+  gettimeofday(&cmd->tv_start, NULL);
+}
+
+int cmd_has_expired(cmd_t cmd)
+{
+  struct timeval now;
+  timerclear(&now);
+  gettimeofday(&now, NULL);
+  cmd.tv_start.tv_sec++;
+
+  return timercmp(&cmd.tv_start, &now, <);
+}
+
+void cmd_pop(cmd_t** first)
+{
+  if(!first || !(*first)) 
+    return;
+
+  cmd_t* deletee = *first;
+  *first = (*first)->next;
+  if(deletee->param)
+    free(deletee->param);
+  free(deletee);
+}
+
+void cmd_clear(cmd_t** first)
+{
+  if(!first || !(*first)) 
+    return;
+
+  while(*first) {
+    cmd_t* deletee = *first;
+    *first = (*first)->next;
+    if(deletee->param)
+      free(deletee->param);
+    free(deletee);
+  }
+}