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Diffstat (limited to 'src/process_iterator.h')
| -rw-r--r-- | src/process_iterator.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/process_iterator.h b/src/process_iterator.h new file mode 100644 index 0000000..82fadac --- /dev/null +++ b/src/process_iterator.h @@ -0,0 +1,95 @@ +/** + * + * cpulimit - a cpu limiter for Linux + * + * Copyright (C) 2005-2012, 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_ITERATOR_H + +#define __PROCESS_ITERATOR_H + +#include <unistd.h> +#include <limits.h> +#include <dirent.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 + +#ifdef __FreeBSD__ +#include <kvm.h> +#endif + +// process descriptor +struct process { + //pid of the process + pid_t pid; + //ppid of the process + pid_t ppid; + //start time (unix timestamp) + int starttime; + //cputime used by the process (in milliseconds) + int cputime; + //actual cpu usage estimation (value in range 0-1) + double cpu_usage; + //absolute path of the executable file + char command[PATH_MAX+1]; +}; + +struct process_filter { + int pid; + int include_children; + char program_name[PATH_MAX+1]; +}; + +struct process_iterator { +#ifdef __linux__ + DIR *dip; + int boot_time; +#elif defined __FreeBSD__ + kvm_t *kd; + struct kinfo_proc *procs; + int count; + int i; +#elif defined __APPLE__ + struct kinfo_proc *proclist; +#endif + struct process_filter *filter; +}; + +int init_process_iterator(struct process_iterator *i, struct process_filter *filter); + +int get_next_process(struct process_iterator *i, struct process *p); + +int close_process_iterator(struct process_iterator *i); + +#endif |