src/process.c

   1 /*
   2  * Copyright (c) 2018 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Flora License, Version 1.1 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://floralicense.org/license/
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <string.h>
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20
  21 #include "process.h"
  22 #include "clock.h"
  23 #include "sys-stats.h"
  24 #include "err-check.h"
  25 #include "procfs.h"
  26 #include "appinfo-provider.h"
  27 #include "json-schema-defs.h"
  28
  29 static struct sys_stats sys;
  30 static int pagesize;
  31 static float timescale;
  32
  33 int process_get_memory_usage(struct process *proc, int *usage)
  34 {
  35         ON_NULL_RETURN_VAL(proc, -1);
  36         ON_NULL_RETURN_VAL(usage, -1);
  37
  38         *usage = proc->memory_used;
  39         return 0;
  40 }
  41
  42 int process_get_cpu_usage(struct process *proc, unsigned long long *usage)
  43 {
  44         ON_NULL_RETURN_VAL(proc, -1);
  45         ON_NULL_RETURN_VAL(usage, -1);
  46
  47         *usage = proc->frame_ticks_used;
  48         return 0;
  49 }
  50
  51 int process_update(struct process *proc)
  52 {
  53         struct procfs_process_stat info;
  54         unsigned long long ticks;
  55
  56         if (procfs_read_process_stat(proc->pid, &info) != 0) {
  57                 return -1;
  58         }
  59         ticks = info.stime + info.utime;
  60         proc->frame_ticks_used = ticks - proc->total_ticks_used;
  61         proc->total_ticks_used = ticks;
  62         proc->memory_used = info.rss * pagesize / 1024;
  63         float now = clock_monotonic_get();
  64         proc->frame_time_inverted = 1.0f / (now - proc->update_time);
  65         proc->update_time = now;
  66
  67         return 0;
  68 }
  69
  70 void process_init_process(int pid, struct process *proc)
  71 {
  72         memset(proc, 0x0, sizeof(struct process));
  73         proc->pid = pid;
  74 }
  75
  76 int process_get_pid(const struct process *proc)
  77 {
  78         ON_NULL_RETURN_VAL(proc, -1);
  79         return proc->pid;
  80 }
  81
  82 const char *process_get_appid(struct process *proc)
  83 {
  84         ON_NULL_RETURN_VAL(proc, NULL);
  85
  86         if (!proc->appid) {
  87                 proc->appid = app_info_provider_find_app_id(proc->pid);
  88         }
  89         return proc->appid;
  90 }
  91
  92 const char *process_get_exe(struct process *proc)
  93 {
  94         ON_NULL_RETURN_VAL(proc, NULL);
  95
  96         if (!proc->exe) {
  97                 if (procfs_read_process_exe(proc->pid, &proc->exe) != 0)
  98                         return NULL;
  99         }
 100         return proc->exe;
 101 }
 102
 103 void process_shutdown(struct process *proc)
 104 {
 105         if (!proc) return;
 106         free(proc->appid);
 107         free(proc->exe);
 108         memset(proc, 0x0, sizeof(struct process));
 109 }
 110
 111 void process_move(struct process *dst, struct process *src)
 112 {
 113         memcpy(dst, src, sizeof(struct process));
 114         src->appid = NULL;
 115         src->exe = NULL;
 116 }
 117
 118 int process_get_cpu_usage_percentage(struct process *proc, float *usage)
 119 {
 120         ON_NULL_RETURN_VAL(proc, -1);
 121         ON_NULL_RETURN_VAL(usage, -1);
 122
 123         *usage = (float)proc->frame_ticks_used * proc->frame_time_inverted * timescale;
 124         return 0;
 125 }
 126
 127 int process_get_memory_usage_percentage(struct process *proc, float *usage)
 128 {
 129         ON_NULL_RETURN_VAL(proc, -1);
 130         ON_NULL_RETURN_VAL(usage, -1);
 131
 132         *usage = (float)proc->memory_used / sys.total_memory;
 133         return 0;
 134 }
 135
 136 int process_init()
 137 {
 138         if (sys_stats_update(&sys) != 0) {
 139                 ERR("stats_update_system_stats failed.");
 140                 return -1;
 141         }
 142         timescale = 1.0f / (float)sysconf(_SC_CLK_TCK);
 143         pagesize = getpagesize();
 144         return 0;
 145 }
 146
 147 void process_serialize(struct process *proc, JsonBuilder *builder)
 148 {
 149         ON_NULL_RETURN(proc);
 150
 151         float tmp;
 152         json_builder_begin_object(builder);
 153
 154         json_builder_set_member_name(builder, SCHEMA_RESULT_APP_ID);
 155         json_builder_add_string_value(builder, process_get_appid(proc));
 156         json_builder_set_member_name(builder, SCHEMA_RESULT_EXE);
 157         json_builder_add_string_value(builder, process_get_exe(proc));
 158         json_builder_set_member_name(builder, SCHEMA_RESULT_PID);
 159         json_builder_add_int_value(builder, process_get_pid(proc));
 160         json_builder_set_member_name(builder, SCHEMA_RESULT_CPU);
 161         process_get_cpu_usage_percentage(proc, &tmp);
 162         json_builder_add_double_value(builder, tmp);
 163         json_builder_set_member_name(builder, SCHEMA_RESULT_MEMORY);
 164         process_get_memory_usage_percentage(proc, &tmp);
 165         json_builder_add_double_value(builder, tmp);
 166
 167         json_builder_end_object(builder);
 168 }