1 files changed, 88 insertions, 0 deletions
diff --git a/src/process.h b/src/process.h
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+/**
+ *
+ * cpulimit - a cpu limiter for Linux
+ *
+ * Copyright (C) 2005-2008, by:  Angelo Marletta <marlonx80@hotmail.com>
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __PROCESS_H
+
+#define __PROCESS_H
+
+#include <sys/time.h>
+#include <unistd.h>
+#include <limits.h>
+
+//USER_HZ detection, from openssl code
+#ifndef HZ
+# if defined(_SC_CLK_TCK) \
+     && (!defined(OPENSSL_SYS_VMS) || __CTRL_VER >= 70000000)
+#  define HZ ((double)sysconf(_SC_CLK_TCK))
+# else
+#  ifndef CLK_TCK
+#   ifndef _BSD_CLK_TCK_ /* FreeBSD hack */
+#    define HZ  100.0
+#   else /* _BSD_CLK_TCK_ */
+#    define HZ ((double)_BSD_CLK_TCK_)
+#   endif
+#  else /* CLK_TCK */
+#   define HZ ((double)CLK_TCK)
+#  endif
+# endif
+#endif
+
+// process descriptor
+struct process {
+	//pid of the process
+	pid_t pid;
+	//pid of the process
+	pid_t ppid;
+	//start time
+	int starttime;
+	//is member of the family?
+	int member; //TODO: delete this field
+	//total number of jiffies used by the process at time last_sample
+	int last_jiffies;
+	//timestamp when last_jiffies and cpu_usage was calculated
+	struct timeval last_sample;
+	//actual cpu usage estimation (value in range 0-1)
+	double cpu_usage;
+	//1 if the process is zombie
+	int is_zombie;
+	//absolute path of the executable file
+	char command[PATH_MAX+1];
+
+	//system-dependent members
+//TODO: delete these members for the sake of portability?
+#ifdef __linux__
+	//preallocate buffers for performance
+	//name of /proc/PID/stat file
+	char stat_file[20];
+	//read buffer for /proc filesystem
+	char buffer[1024];
+#endif	
+};
+
+int get_proc_info(struct process *p, pid_t pid);
+
+int process_init(struct process *proc, pid_t pid);
+
+int process_monitor(struct process *proc);
+
+int process_close(struct process *proc);
+
+#endif