src/process.c

   1 #include <string.h>
   2 #include <stdlib.h>
   3
   4 #include "process.h"
   5 #include "err-check.h"
   6 #include "procfs.h"
   7 #include "appinfo-provider.h"
   8
   9 int process_get_memory_usage(struct process *proc, int *usage)
  10 {
  11         ON_NULL_RETURN_VAL(proc, -1);
  12         ON_NULL_RETURN_VAL(usage, -1);
  13
  14         *usage = proc->memory_used;
  15         return 0;
  16 }
  17
  18 int process_get_cpu_usage(struct process *proc, unsigned long long *usage)
  19 {
  20         ON_NULL_RETURN_VAL(proc, -1);
  21         ON_NULL_RETURN_VAL(usage, -1);
  22
  23         *usage = proc->frame_ticks_used;
  24         return 0;
  25 }
  26
  27 int process_update(struct process *proc)
  28 {
  29         struct procfs_process_stat info;
  30         unsigned long long ticks;
  31
  32         if (procfs_read_process_stat(proc->pid, &info) != 0) {
  33                 return -1;
  34         }
  35         ticks = info.stime + info.utime;
  36         proc->frame_ticks_used = ticks - proc->total_ticks_used;
  37         proc->total_ticks_used = ticks;
  38         proc->memory_used = info.rss * stats_get_page_size() / 1024;
  39
  40         return 0;
  41 }
  42
  43 void process_init(int pid, struct process *proc)
  44 {
  45         memset(proc, 0x0, sizeof(struct process));
  46         proc->pid = pid;
  47 }
  48
  49 int process_get_pid(const struct process *proc)
  50 {
  51         ON_NULL_RETURN_VAL(proc, -1);
  52         return proc->pid;
  53 }
  54
  55 const char *process_get_appid(struct process *proc)
  56 {
  57         ON_NULL_RETURN_VAL(proc, NULL);
  58
  59         if (!proc->appid) {
  60                 proc->appid = app_info_provider_find_app_id(proc->pid);
  61         }
  62         return proc->appid;
  63 }
  64
  65 const char *process_get_exe(struct process *proc)
  66 {
  67         ON_NULL_RETURN_VAL(proc, NULL);
  68
  69         if (!proc->exe) {
  70                 if (procfs_read_process_exe(proc->pid, &proc->exe) != 0)
  71                         return NULL;
  72         }
  73         return proc->exe;
  74 }
  75
  76 void process_shutdown(struct process *proc)
  77 {
  78         if (!proc) return;
  79         if (proc->appid) free(proc->appid);
  80         if (proc->exe) free(proc->exe);
  81 }
  82
  83 void process_move(struct process *dst, struct process *src)
  84 {
  85         process_shutdown(dst);
  86         memcpy(dst, src, sizeof(struct process));
  87         src->appid = NULL;
  88         src->exe = NULL;
  89 }